aboutsummaryrefslogtreecommitdiff
path: root/libiberty/cp-demangle.c
blob: 8caa733c91f54fade968021e82ab9fe74d95877d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
/* Demangler for IA64 / g++ V3 ABI.
   Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
   Written by Alex Samuel <samuel@codesourcery.com>. 

   This file is part of the libiberty library, which is part of GCC.

   This file is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   In addition to the permissions in the GNU General Public License, the
   Free Software Foundation gives you unlimited permission to link the
   compiled version of this file into combinations with other programs,
   and to distribute those combinations without any restriction coming
   from the use of this file.  (The General Public License restrictions
   do apply in other respects; for example, they cover modification of
   the file, and distribution when not linked into a combined
   executable.)

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
*/

/* This file implements demangling of C++ names mangled according to
   the IA64 / g++ V3 ABI.  Use the cp_demangle function to
   demangle a mangled name, or compile with the preprocessor macro
   STANDALONE_DEMANGLER defined to create a demangling filter
   executable (functionally similar to c++filt, but includes this
   demangler only).  */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/types.h>

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#include <stdio.h>

#ifdef HAVE_STRING_H
#include <string.h>
#endif

#include <ctype.h>

#include "ansidecl.h"
#include "libiberty.h"
#include "dyn-string.h"
#include "demangle.h"

/* If CP_DEMANGLE_DEBUG is defined, a trace of the grammar evaluation,
   and other debugging output, will be generated. */
#ifdef CP_DEMANGLE_DEBUG
#define DEMANGLE_TRACE(PRODUCTION, DM)                                  \
  fprintf (stderr, " -> %-24s at position %3d\n",                       \
           (PRODUCTION), current_position (DM));
#else
#define DEMANGLE_TRACE(PRODUCTION, DM)
#endif

/* Don't include <ctype.h>, to prevent additional unresolved symbols
   from being dragged into the C++ runtime library.  */
#define IS_DIGIT(CHAR) ((CHAR) >= '0' && (CHAR) <= '9')
#define IS_ALPHA(CHAR)                                                  \
  (((CHAR) >= 'a' && (CHAR) <= 'z')                                     \
   || ((CHAR) >= 'A' && (CHAR) <= 'Z'))

/* The prefix prepended by GCC to an identifier represnting the
   anonymous namespace.  */
#define ANONYMOUS_NAMESPACE_PREFIX "_GLOBAL_"

/* Character(s) to use for namespace separation in demangled output */
#define NAMESPACE_SEPARATOR (dm->style == DMGL_JAVA ? "." : "::")

/* If flag_verbose is zero, some simplifications will be made to the
   output to make it easier to read and supress details that are
   generally not of interest to the average C++ programmer.
   Otherwise, the demangled representation will attempt to convey as
   much information as the mangled form.  */
static int flag_verbose;

/* If flag_strict is non-zero, demangle strictly according to the
   specification -- don't demangle special g++ manglings.  */
static int flag_strict;

/* String_list_t is an extended form of dyn_string_t which provides a
   link field and a caret position for additions to the string.  A
   string_list_t may safely be cast to and used as a dyn_string_t.  */

struct string_list_def
{
  /* The dyn_string; must be first.  */
  struct dyn_string string;

  /* The position at which additional text is added to this string
     (using the result_add* macros).  This value is an offset from the
     end of the string, not the beginning (and should be
     non-positive).  */
  int caret_position;

  /* The next string in the list.  */
  struct string_list_def *next;
};

typedef struct string_list_def *string_list_t;

/* Data structure representing a potential substitution.  */

struct substitution_def
{
  /* The demangled text of the substitution.  */
  dyn_string_t text;

  /* Whether this substitution represents a template item.  */
  int template_p : 1;
};

/* Data structure representing a template argument list.  */

struct template_arg_list_def
{
  /* The next (lower) template argument list in the stack of currently
     active template arguments.  */
  struct template_arg_list_def *next;

  /* The first element in the list of template arguments in
     left-to-right order.  */
  string_list_t first_argument;

  /* The last element in the arguments lists.  */
  string_list_t last_argument;
};

typedef struct template_arg_list_def *template_arg_list_t;

/* Data structure to maintain the state of the current demangling.  */

struct demangling_def
{
  /* The full mangled name being mangled.  */
  const char *name;

  /* Pointer into name at the current position.  */
  const char *next;

  /* Stack for strings containing demangled result generated so far.
     Text is emitted to the topmost (first) string.  */
  string_list_t result;

  /* The number of presently available substitutions.  */
  int num_substitutions;

  /* The allocated size of the substitutions array.  */
  int substitutions_allocated;

  /* An array of available substitutions.  The number of elements in
     the array is given by num_substitions, and the allocated array
     size in substitutions_size.  

     The most recent substition is at the end, so

       - `S_'  corresponds to substititutions[num_substitutions - 1] 
       - `S0_' corresponds to substititutions[num_substitutions - 2]

     etc. */
  struct substitution_def *substitutions;

  /* The stack of template argument lists.  */
  template_arg_list_t template_arg_lists;

  /* The most recently demangled source-name.  */
  dyn_string_t last_source_name;
  
  /* Language style to use for demangled output. */
  int style;

  /* Set to non-zero iff this name is a constructor.  The actual value
     indicates what sort of constructor this is; see demangle.h.  */
  enum gnu_v3_ctor_kinds is_constructor;

  /* Set to non-zero iff this name is a destructor.  The actual value
     indicates what sort of destructor this is; see demangle.h.  */
  enum gnu_v3_dtor_kinds is_destructor;

};

typedef struct demangling_def *demangling_t;

/* This type is the standard return code from most functions.  Values
   other than STATUS_OK contain descriptive messages.  */
typedef const char *status_t;

/* Special values that can be used as a status_t.  */
#define STATUS_OK                       NULL
#define STATUS_ERROR                    "Error."
#define STATUS_UNIMPLEMENTED            "Unimplemented."
#define STATUS_INTERNAL_ERROR           "Internal error."

/* This status code indicates a failure in malloc or realloc.  */
static const char *const status_allocation_failed = "Allocation failed.";
#define STATUS_ALLOCATION_FAILED        status_allocation_failed

/* Non-zero if STATUS indicates that no error has occurred.  */
#define STATUS_NO_ERROR(STATUS)         ((STATUS) == STATUS_OK)

/* Evaluate EXPR, which must produce a status_t.  If the status code
   indicates an error, return from the current function with that
   status code.  */
#define RETURN_IF_ERROR(EXPR)                                           \
  do                                                                    \
    {                                                                   \
      status_t s = EXPR;                                                \
      if (!STATUS_NO_ERROR (s))                                         \
	return s;                                                       \
    }                                                                   \
  while (0)

static status_t int_to_dyn_string 
  PARAMS ((int, dyn_string_t));
static string_list_t string_list_new
  PARAMS ((int));
static void string_list_delete
  PARAMS ((string_list_t));
static status_t result_add_separated_char
  PARAMS ((demangling_t, int));
static status_t result_push
  PARAMS ((demangling_t));
static string_list_t result_pop
  PARAMS ((demangling_t));
static int substitution_start
  PARAMS ((demangling_t));
static status_t substitution_add
  PARAMS ((demangling_t, int, int));
static dyn_string_t substitution_get
  PARAMS ((demangling_t, int, int *));
#ifdef CP_DEMANGLE_DEBUG
static void substitutions_print 
  PARAMS ((demangling_t, FILE *));
#endif
static template_arg_list_t template_arg_list_new
  PARAMS ((void));
static void template_arg_list_delete
  PARAMS ((template_arg_list_t));
static void template_arg_list_add_arg 
  PARAMS ((template_arg_list_t, string_list_t));
static string_list_t template_arg_list_get_arg
  PARAMS ((template_arg_list_t, int));
static void push_template_arg_list
  PARAMS ((demangling_t, template_arg_list_t));
static void pop_to_template_arg_list
  PARAMS ((demangling_t, template_arg_list_t));
#ifdef CP_DEMANGLE_DEBUG
static void template_arg_list_print
  PARAMS ((template_arg_list_t, FILE *));
#endif
static template_arg_list_t current_template_arg_list
  PARAMS ((demangling_t));
static demangling_t demangling_new
  PARAMS ((const char *, int));
static void demangling_delete 
  PARAMS ((demangling_t));

/* The last character of DS.  Warning: DS is evaluated twice.  */
#define dyn_string_last_char(DS)                                        \
  (dyn_string_buf (DS)[dyn_string_length (DS) - 1])

/* Append a space character (` ') to DS if it does not already end
   with one.  Evaluates to 1 on success, or 0 on allocation failure.  */
#define dyn_string_append_space(DS)                                     \
      ((dyn_string_length (DS) > 0                                      \
        && dyn_string_last_char (DS) != ' ')                            \
       ? dyn_string_append_char ((DS), ' ')                             \
       : 1)

/* Returns the index of the current position in the mangled name.  */
#define current_position(DM)    ((DM)->next - (DM)->name)

/* Returns the character at the current position of the mangled name.  */
#define peek_char(DM)           (*((DM)->next))

/* Returns the character one past the current position of the mangled
   name.  */
#define peek_char_next(DM)                                              \
  (peek_char (DM) == '\0' ? '\0' : (*((DM)->next + 1)))

/* Returns the character at the current position, and advances the
   current position to the next character.  */
#define next_char(DM)           (*((DM)->next)++)

/* Returns non-zero if the current position is the end of the mangled
   name, i.e. one past the last character.  */
#define end_of_name_p(DM)       (peek_char (DM) == '\0')

/* Advances the current position by one character.  */
#define advance_char(DM)        (++(DM)->next)

/* Returns the string containing the current demangled result.  */
#define result_string(DM)       (&(DM)->result->string)

/* Returns the position at which new text is inserted into the
   demangled result.  */
#define result_caret_pos(DM)                                            \
  (result_length (DM) +                                                 \
   ((string_list_t) result_string (DM))->caret_position)

/* Adds a dyn_string_t to the demangled result.  */
#define result_add_string(DM, STRING)                                   \
  (dyn_string_insert (&(DM)->result->string,                            \
		      result_caret_pos (DM), (STRING))                  \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* Adds NUL-terminated string CSTR to the demangled result.    */
#define result_add(DM, CSTR)                                            \
  (dyn_string_insert_cstr (&(DM)->result->string,                       \
			   result_caret_pos (DM), (CSTR))               \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* Adds character CHAR to the demangled result.  */
#define result_add_char(DM, CHAR)                                       \
  (dyn_string_insert_char (&(DM)->result->string,                       \
			   result_caret_pos (DM), (CHAR))               \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* Inserts a dyn_string_t to the demangled result at position POS.  */
#define result_insert_string(DM, POS, STRING)                           \
  (dyn_string_insert (&(DM)->result->string, (POS), (STRING))           \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* Inserts NUL-terminated string CSTR to the demangled result at
   position POS.  */
#define result_insert(DM, POS, CSTR)                                    \
  (dyn_string_insert_cstr (&(DM)->result->string, (POS), (CSTR))        \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* Inserts character CHAR to the demangled result at position POS.  */
#define result_insert_char(DM, POS, CHAR)                               \
  (dyn_string_insert_char (&(DM)->result->string, (POS), (CHAR))        \
   ? STATUS_OK : STATUS_ALLOCATION_FAILED)

/* The length of the current demangled result.  */
#define result_length(DM)                                               \
  dyn_string_length (&(DM)->result->string)

/* Appends a (less-than, greater-than) character to the result in DM
   to (open, close) a template argument or parameter list.  Appends a
   space first if necessary to prevent spurious elision of angle
   brackets with the previous character.  */
#define result_open_template_list(DM) result_add_separated_char(DM, '<')
#define result_close_template_list(DM) result_add_separated_char(DM, '>')

/* Appends a base 10 representation of VALUE to DS.  STATUS_OK on
   success.  On failure, deletes DS and returns an error code.  */

static status_t
int_to_dyn_string (value, ds)
     int value;
     dyn_string_t ds;
{
  int i;
  int mask = 1;

  /* Handle zero up front.  */
  if (value == 0)
    {
      if (!dyn_string_append_char (ds, '0'))
	return STATUS_ALLOCATION_FAILED;
      return STATUS_OK;
    }

  /* For negative numbers, emit a minus sign.  */
  if (value < 0)
    {
      if (!dyn_string_append_char (ds, '-'))
	return STATUS_ALLOCATION_FAILED;
      value = -value;
    }
  
  /* Find the power of 10 of the first digit.  */
  i = value;
  while (i > 9)
    {
      mask *= 10;
      i /= 10;
    }

  /* Write the digits.  */
  while (mask > 0)
    {
      int digit = value / mask;

      if (!dyn_string_append_char (ds, '0' + digit))
	return STATUS_ALLOCATION_FAILED;

      value -= digit * mask;
      mask /= 10;
    }

  return STATUS_OK;
}

/* Creates a new string list node.  The contents of the string are
   empty, but the initial buffer allocation is LENGTH.  The string
   list node should be deleted with string_list_delete.  Returns NULL
   if allocation fails.  */

static string_list_t 
string_list_new (length)
     int length;
{
  string_list_t s = (string_list_t) malloc (sizeof (struct string_list_def));
  s->caret_position = 0;
  if (s == NULL)
    return NULL;
  if (!dyn_string_init ((dyn_string_t) s, length))
    return NULL;
  return s;
}  

/* Deletes the entire string list starting at NODE.  */

static void
string_list_delete (node)
     string_list_t node;
{
  while (node != NULL)
    {
      string_list_t next = node->next;
      dyn_string_delete ((dyn_string_t) node);
      node = next;
    }
}

/* Appends CHARACTER to the demangled result.  If the current trailing
   character of the result is CHARACTER, a space is inserted first.  */

static status_t
result_add_separated_char (dm, character)
     demangling_t dm;
     int character;
{
  char *result = dyn_string_buf (result_string (dm));
  int caret_pos = result_caret_pos (dm);

  /* Add a space if the last character is already the character we
     want to add.  */
  if (caret_pos > 0 && result[caret_pos - 1] == character)
    RETURN_IF_ERROR (result_add_char (dm, ' '));
  /* Add the character.  */
  RETURN_IF_ERROR (result_add_char (dm, character));

  return STATUS_OK;
}

/* Allocates and pushes a new string onto the demangled results stack
   for DM.  Subsequent demangling with DM will emit to the new string.
   Returns STATUS_OK on success, STATUS_ALLOCATION_FAILED on
   allocation failure.  */

static status_t
result_push (dm)
     demangling_t dm;
{
  string_list_t new_string = string_list_new (0);
  if (new_string == NULL)
    /* Allocation failed.  */
    return STATUS_ALLOCATION_FAILED;

  /* Link the new string to the front of the list of result strings.  */
  new_string->next = (string_list_t) dm->result;
  dm->result = new_string;
  return STATUS_OK;
}

/* Removes and returns the topmost element on the demangled results
   stack for DM.  The caller assumes ownership for the returned
   string.  */

static string_list_t
result_pop (dm)
     demangling_t dm;
{
  string_list_t top = dm->result;
  dm->result = top->next;
  return top;
}

/* Returns the current value of the caret for the result string.  The
   value is an offet from the end of the result string.  */

static int
result_get_caret (dm)
     demangling_t dm;
{
  return ((string_list_t) result_string (dm))->caret_position;
}

/* Sets the value of the caret for the result string, counted as an
   offet from the end of the result string.  */

static void
result_set_caret (dm, position)
     demangling_t dm;
     int position;
{
  ((string_list_t) result_string (dm))->caret_position = position;
}

/* Shifts the position of the next addition to the result by
   POSITION_OFFSET.  A negative value shifts the caret to the left.  */

static void
result_shift_caret (dm, position_offset)
     demangling_t dm;
     int position_offset;
{
  ((string_list_t) result_string (dm))->caret_position += position_offset;
}

/* Returns non-zero if the character that comes right before the place
   where text will be added to the result is a space.  In this case,
   the caller should supress adding another space.  */

static int
result_previous_char_is_space (dm)
     demangling_t dm;
{
  char *result = dyn_string_buf (result_string (dm));
  int pos = result_caret_pos (dm);
  return pos > 0 && result[pos - 1] == ' ';
}

/* Returns the start position of a fragment of the demangled result
   that will be a substitution candidate.  Should be called at the
   start of productions that can add substitutions.  */

static int
substitution_start (dm)
     demangling_t dm;
{
  return result_caret_pos (dm);
}

/* Adds the suffix of the current demangled result of DM starting at
   START_POSITION as a potential substitution.  If TEMPLATE_P is
   non-zero, this potential substitution is a template-id.  */

static status_t
substitution_add (dm, start_position, template_p)
     demangling_t dm;
     int start_position;
     int template_p;
{
  dyn_string_t result = result_string (dm);
  dyn_string_t substitution = dyn_string_new (0);
  int i;

  if (substitution == NULL)
    return STATUS_ALLOCATION_FAILED;

  /* Extract the substring of the current demangling result that
     represents the subsitution candidate.  */
  if (!dyn_string_substring (substitution, 
			     result, start_position, result_caret_pos (dm)))
    {
      dyn_string_delete (substitution);
      return STATUS_ALLOCATION_FAILED;
    }

  /* If there's no room for the new entry, grow the array.  */
  if (dm->substitutions_allocated == dm->num_substitutions)
    {
      size_t new_array_size;
      if (dm->substitutions_allocated > 0)
	dm->substitutions_allocated *= 2;
      else
	dm->substitutions_allocated = 2;
      new_array_size = 
	sizeof (struct substitution_def) * dm->substitutions_allocated;

      dm->substitutions = (struct substitution_def *)
	realloc (dm->substitutions, new_array_size);
      if (dm->substitutions == NULL)
	/* Realloc failed.  */
	{
	  dyn_string_delete (substitution);
	  return STATUS_ALLOCATION_FAILED;
	}
    }

  /* Add the substitution to the array.  */
  i = dm->num_substitutions++;
  dm->substitutions[i].text = substitution;
  dm->substitutions[i].template_p = template_p;

#ifdef CP_DEMANGLE_DEBUG
  substitutions_print (dm, stderr);
#endif

  return STATUS_OK;
}

/* Returns the Nth-most-recent substitution.  Sets *TEMPLATE_P to
   non-zero if the substitution is a template-id, zero otherwise.  
   N is numbered from zero.  DM retains ownership of the returned
   string.  If N is negative, or equal to or greater than the current
   number of substitution candidates, returns NULL.  */

static dyn_string_t
substitution_get (dm, n, template_p)
     demangling_t dm;
     int n;
     int *template_p;
{
  struct substitution_def *sub;

  /* Make sure N is in the valid range.  */
  if (n < 0 || n >= dm->num_substitutions)
    return NULL;

  sub = &(dm->substitutions[n]);
  *template_p = sub->template_p;
  return sub->text;
}

#ifdef CP_DEMANGLE_DEBUG
/* Debugging routine to print the current substitutions to FP.  */

static void
substitutions_print (dm, fp)
     demangling_t dm;
     FILE *fp;
{
  int seq_id;
  int num = dm->num_substitutions;

  fprintf (fp, "SUBSTITUTIONS:\n");
  for (seq_id = -1; seq_id < num - 1; ++seq_id)
    {
      int template_p;
      dyn_string_t text = substitution_get (dm, seq_id + 1, &template_p);

      if (seq_id == -1)
	fprintf (fp, " S_ ");
      else
	fprintf (fp, " S%d_", seq_id);
      fprintf (fp, " %c: %s\n", template_p ? '*' : ' ', dyn_string_buf (text));
    }
}

#endif /* CP_DEMANGLE_DEBUG */

/* Creates a new template argument list.  Returns NULL if allocation
   fails.  */

static template_arg_list_t
template_arg_list_new ()
{
  template_arg_list_t new_list =
    (template_arg_list_t) malloc (sizeof (struct template_arg_list_def));
  if (new_list == NULL)
    return NULL;
  /* Initialize the new list to have no arguments.  */
  new_list->first_argument = NULL;
  new_list->last_argument = NULL;
  /* Return the new list.  */
  return new_list;
}

/* Deletes a template argument list and the template arguments it
   contains.  */

static void
template_arg_list_delete (list)
     template_arg_list_t list;
{
  /* If there are any arguments on LIST, delete them.  */
  if (list->first_argument != NULL)
    string_list_delete (list->first_argument);
  /* Delete LIST.  */
  free (list);
}

/* Adds ARG to the template argument list ARG_LIST.  */

static void 
template_arg_list_add_arg (arg_list, arg)
     template_arg_list_t arg_list;
     string_list_t arg;
{
  if (arg_list->first_argument == NULL)
    /* If there were no arguments before, ARG is the first one.  */
    arg_list->first_argument = arg;
  else
    /* Make ARG the last argument on the list.  */
    arg_list->last_argument->next = arg;
  /* Make ARG the last on the list.  */
  arg_list->last_argument = arg;
  arg->next = NULL;
}

/* Returns the template arugment at position INDEX in template
   argument list ARG_LIST.  */

static string_list_t
template_arg_list_get_arg (arg_list, index)
     template_arg_list_t arg_list;
     int index;
{
  string_list_t arg = arg_list->first_argument;
  /* Scan down the list of arguments to find the one at position
     INDEX.  */
  while (index--)
    {
      arg = arg->next;
      if (arg == NULL)
	/* Ran out of arguments before INDEX hit zero.  That's an
	   error.  */
	return NULL;
    }
  /* Return the argument at position INDEX.  */
  return arg;
}

/* Pushes ARG_LIST onto the top of the template argument list stack.  */

static void
push_template_arg_list (dm, arg_list)
     demangling_t dm;
     template_arg_list_t arg_list;
{
  arg_list->next = dm->template_arg_lists;
  dm->template_arg_lists = arg_list;
#ifdef CP_DEMANGLE_DEBUG
  fprintf (stderr, " ** pushing template arg list\n");
  template_arg_list_print (arg_list, stderr);
#endif 
}

/* Pops and deletes elements on the template argument list stack until
   arg_list is the topmost element.  If arg_list is NULL, all elements
   are popped and deleted.  */

static void
pop_to_template_arg_list (dm, arg_list)
     demangling_t dm;
     template_arg_list_t arg_list;
{
  while (dm->template_arg_lists != arg_list)
    {
      template_arg_list_t top = dm->template_arg_lists;
      /* Disconnect the topmost element from the list.  */
      dm->template_arg_lists = top->next;
      /* Delete the popped element.  */
      template_arg_list_delete (top);
#ifdef CP_DEMANGLE_DEBUG
      fprintf (stderr, " ** removing template arg list\n");
#endif
    }
}

#ifdef CP_DEMANGLE_DEBUG

/* Prints the contents of ARG_LIST to FP.  */

static void
template_arg_list_print (arg_list, fp)
  template_arg_list_t arg_list;
  FILE *fp;
{
  string_list_t arg;
  int index = -1;

  fprintf (fp, "TEMPLATE ARGUMENT LIST:\n");
  for (arg = arg_list->first_argument; arg != NULL; arg = arg->next)
    {
      if (index == -1)
	fprintf (fp, " T_  : ");
      else
	fprintf (fp, " T%d_ : ", index);
      ++index;
      fprintf (fp, "%s\n", dyn_string_buf ((dyn_string_t) arg));
    }
}

#endif /* CP_DEMANGLE_DEBUG */

/* Returns the topmost element on the stack of template argument
   lists.  If there is no list of template arguments, returns NULL.  */

static template_arg_list_t
current_template_arg_list (dm)
     demangling_t dm;
{
  return dm->template_arg_lists;
}

/* Allocates a demangling_t object for demangling mangled NAME.  A new
   result must be pushed before the returned object can be used.
   Returns NULL if allocation fails.  */

static demangling_t
demangling_new (name, style)
     const char *name;
     int style;
{
  demangling_t dm;
  dm = (demangling_t) malloc (sizeof (struct demangling_def));
  if (dm == NULL)
    return NULL;

  dm->name = name;
  dm->next = name;
  dm->result = NULL;
  dm->num_substitutions = 0;
  dm->substitutions_allocated = 10;
  dm->template_arg_lists = NULL;
  dm->last_source_name = dyn_string_new (0);
  if (dm->last_source_name == NULL)
    return NULL;
  dm->substitutions = (struct substitution_def *)
    malloc (dm->substitutions_allocated * sizeof (struct substitution_def));
  if (dm->substitutions == NULL)
    {
      dyn_string_delete (dm->last_source_name);
      return NULL;
    }
  dm->style = style;
  dm->is_constructor = (enum gnu_v3_ctor_kinds) 0;
  dm->is_destructor = (enum gnu_v3_dtor_kinds) 0;

  return dm;
}

/* Deallocates a demangling_t object and all memory associated with
   it.  */

static void
demangling_delete (dm)
     demangling_t dm;
{
  int i;
  template_arg_list_t arg_list = dm->template_arg_lists;

  /* Delete the stack of template argument lists.  */
  while (arg_list != NULL)
    {
      template_arg_list_t next = arg_list->next;
      template_arg_list_delete (arg_list);
      arg_list = next;
    }
  /* Delete the list of substitutions.  */
  for (i = dm->num_substitutions; --i >= 0; )
    dyn_string_delete (dm->substitutions[i].text);
  free (dm->substitutions);
  /* Delete the demangled result.  */
  string_list_delete (dm->result);
  /* Delete the stored identifier name.  */
  dyn_string_delete (dm->last_source_name);
  /* Delete the context object itself.  */
  free (dm);
}

/* These functions demangle an alternative of the corresponding
   production in the mangling spec.  The first argument of each is a
   demangling context structure for the current demangling
   operation.  Most emit demangled text directly to the topmost result
   string on the result string stack in the demangling context
   structure.  */

static status_t demangle_char
  PARAMS ((demangling_t, int));
static status_t demangle_mangled_name 
  PARAMS ((demangling_t));
static status_t demangle_encoding
  PARAMS ((demangling_t));
static status_t demangle_name
  PARAMS ((demangling_t, int *));
static status_t demangle_nested_name
  PARAMS ((demangling_t, int *));
static status_t demangle_prefix
  PARAMS ((demangling_t, int *));
static status_t demangle_unqualified_name
  PARAMS ((demangling_t, int *));
static status_t demangle_source_name
  PARAMS ((demangling_t));
static status_t demangle_number
  PARAMS ((demangling_t, int *, int, int));
static status_t demangle_number_literally
  PARAMS ((demangling_t, dyn_string_t, int, int));
static status_t demangle_identifier
  PARAMS ((demangling_t, int, dyn_string_t));
static status_t demangle_operator_name
  PARAMS ((demangling_t, int, int *, int *));
static status_t demangle_nv_offset
  PARAMS ((demangling_t));
static status_t demangle_v_offset
  PARAMS ((demangling_t));
static status_t demangle_call_offset
  PARAMS ((demangling_t));
static status_t demangle_special_name
  PARAMS ((demangling_t));
static status_t demangle_ctor_dtor_name
  PARAMS ((demangling_t));
static status_t demangle_type_ptr
  PARAMS ((demangling_t, int *, int));
static status_t demangle_type
  PARAMS ((demangling_t));
static status_t demangle_CV_qualifiers
  PARAMS ((demangling_t, dyn_string_t));
static status_t demangle_builtin_type
  PARAMS ((demangling_t));
static status_t demangle_function_type
  PARAMS ((demangling_t, int *));
static status_t demangle_bare_function_type
  PARAMS ((demangling_t, int *));
static status_t demangle_class_enum_type
  PARAMS ((demangling_t, int *));
static status_t demangle_array_type
  PARAMS ((demangling_t, int *));
static status_t demangle_template_param
  PARAMS ((demangling_t));
static status_t demangle_template_args
  PARAMS ((demangling_t));
static status_t demangle_literal
  PARAMS ((demangling_t));
static status_t demangle_template_arg
  PARAMS ((demangling_t));
static status_t demangle_expression
  PARAMS ((demangling_t));
static status_t demangle_scope_expression
  PARAMS ((demangling_t));
static status_t demangle_expr_primary
  PARAMS ((demangling_t));
static status_t demangle_substitution
  PARAMS ((demangling_t, int *));
static status_t demangle_local_name
  PARAMS ((demangling_t));
static status_t demangle_discriminator 
  PARAMS ((demangling_t, int));
static status_t cp_demangle
  PARAMS ((const char *, dyn_string_t, int));
static status_t cp_demangle_type
  PARAMS ((const char*, dyn_string_t));

/* When passed to demangle_bare_function_type, indicates that the
   function's return type is not encoded before its parameter types.  */
#define BFT_NO_RETURN_TYPE    NULL

/* Check that the next character is C.  If so, consume it.  If not,
   return an error.  */

static status_t
demangle_char (dm, c)
     demangling_t dm;
     int c;
{
  static char *error_message = NULL;

  if (peek_char (dm) == c)
    {
      advance_char (dm);
      return STATUS_OK;
    }
  else
    {
      if (error_message == NULL)
	error_message = (char *) strdup ("Expected ?");
      error_message[9] = c;
      return error_message;
    }
}

/* Demangles and emits a <mangled-name>.  

    <mangled-name>      ::= _Z <encoding>  */

static status_t
demangle_mangled_name (dm)
     demangling_t dm;
{
  DEMANGLE_TRACE ("mangled-name", dm);
  RETURN_IF_ERROR (demangle_char (dm, '_'));
  RETURN_IF_ERROR (demangle_char (dm, 'Z'));
  RETURN_IF_ERROR (demangle_encoding (dm));
  return STATUS_OK;
}

/* Demangles and emits an <encoding>.  

    <encoding>		::= <function name> <bare-function-type>
			::= <data name>
			::= <special-name>  */

static status_t
demangle_encoding (dm)
     demangling_t dm;
{
  int encode_return_type;
  int start_position;
  template_arg_list_t old_arg_list = current_template_arg_list (dm);
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("encoding", dm);
  
  /* Remember where the name starts.  If it turns out to be a template
     function, we'll have to insert the return type here.  */
  start_position = result_caret_pos (dm);

  if (peek == 'G' || peek == 'T')
    RETURN_IF_ERROR (demangle_special_name (dm));
  else
    {
      /* Now demangle the name.  */
      RETURN_IF_ERROR (demangle_name (dm, &encode_return_type));

      /* If there's anything left, the name was a function name, with
	 maybe its return type, and its parameter types, following.  */
      if (!end_of_name_p (dm) 
	  && peek_char (dm) != 'E')
	{
	  if (encode_return_type)
	    /* Template functions have their return type encoded.  The
	       return type should be inserted at start_position.  */
	    RETURN_IF_ERROR 
	      (demangle_bare_function_type (dm, &start_position));
	  else
	    /* Non-template functions don't have their return type
	       encoded.  */
	    RETURN_IF_ERROR 
	      (demangle_bare_function_type (dm, BFT_NO_RETURN_TYPE)); 
	}
    }

  /* Pop off template argument lists that were built during the
     mangling of this name, to restore the old template context.  */
  pop_to_template_arg_list (dm, old_arg_list);

  return STATUS_OK;
}

/* Demangles and emits a <name>.

    <name>              ::= <unscoped-name>
                        ::= <unscoped-template-name> <template-args>
			::= <nested-name>
                        ::= <local-name>

    <unscoped-name>     ::= <unqualified-name>
			::= St <unqualified-name>   # ::std::

    <unscoped-template-name>    
                        ::= <unscoped-name>
                        ::= <substitution>  */

static status_t
demangle_name (dm, encode_return_type)
     demangling_t dm;
     int *encode_return_type;
{
  int start = substitution_start (dm);
  char peek = peek_char (dm);
  int is_std_substitution = 0;

  /* Generally, the return type is encoded if the function is a
     template-id, and suppressed otherwise.  There are a few cases,
     though, in which the return type is not encoded even for a
     templated function.  In these cases, this flag is set.  */
  int suppress_return_type = 0;

  DEMANGLE_TRACE ("name", dm);

  switch (peek)
    {
    case 'N':
      /* This is a <nested-name>.  */
      RETURN_IF_ERROR (demangle_nested_name (dm, encode_return_type));
      break;

    case 'Z':
      RETURN_IF_ERROR (demangle_local_name (dm));
      *encode_return_type = 0;
      break;

    case 'S':
      /* The `St' substitution allows a name nested in std:: to appear
	 without being enclosed in a nested name.  */
      if (peek_char_next (dm) == 't') 
	{
	  (void) next_char (dm);
	  (void) next_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "std::"));
	  RETURN_IF_ERROR 
	    (demangle_unqualified_name (dm, &suppress_return_type));
	  is_std_substitution = 1;
	}
      else
	RETURN_IF_ERROR (demangle_substitution (dm, encode_return_type));
      /* Check if a template argument list immediately follows.
	 If so, then we just demangled an <unqualified-template-name>.  */
      if (peek_char (dm) == 'I') 
	{
	  /* A template name of the form std::<unqualified-name> is a
             substitution candidate.  */
	  if (is_std_substitution)
	    RETURN_IF_ERROR (substitution_add (dm, start, 0));
	  /* Demangle the <template-args> here.  */
	  RETURN_IF_ERROR (demangle_template_args (dm));
	  *encode_return_type = !suppress_return_type;
	}
      else
	*encode_return_type = 0;

      break;

    default:
      /* This is an <unscoped-name> or <unscoped-template-name>.  */
      RETURN_IF_ERROR (demangle_unqualified_name (dm, &suppress_return_type));

      /* If the <unqualified-name> is followed by template args, this
	 is an <unscoped-template-name>.  */
      if (peek_char (dm) == 'I')
	{
	  /* Add a substitution for the unqualified template name.  */
	  RETURN_IF_ERROR (substitution_add (dm, start, 0));

	  RETURN_IF_ERROR (demangle_template_args (dm));
	  *encode_return_type = !suppress_return_type;
	}
      else
	*encode_return_type = 0;

      break;
    }

  return STATUS_OK;
}

/* Demangles and emits a <nested-name>. 

    <nested-name>     ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E  */

static status_t
demangle_nested_name (dm, encode_return_type)
     demangling_t dm;
     int *encode_return_type;
{
  char peek;

  DEMANGLE_TRACE ("nested-name", dm);

  RETURN_IF_ERROR (demangle_char (dm, 'N'));

  peek = peek_char (dm);
  if (peek == 'r' || peek == 'V' || peek == 'K')
    {
      dyn_string_t cv_qualifiers;
      status_t status;

      /* Snarf up CV qualifiers.  */
      cv_qualifiers = dyn_string_new (24);
      if (cv_qualifiers == NULL)
	return STATUS_ALLOCATION_FAILED;
      demangle_CV_qualifiers (dm, cv_qualifiers);

      /* Emit them, preceded by a space.  */
      status = result_add_char (dm, ' ');
      if (STATUS_NO_ERROR (status)) 
	status = result_add_string (dm, cv_qualifiers);
      /* The CV qualifiers that occur in a <nested-name> will be
	 qualifiers for member functions.  These are placed at the end
	 of the function.  Therefore, shift the caret to the left by
	 the length of the qualifiers, so other text is inserted
	 before them and they stay at the end.  */
      result_shift_caret (dm, -dyn_string_length (cv_qualifiers) - 1);
      /* Clean up.  */
      dyn_string_delete (cv_qualifiers);
      RETURN_IF_ERROR (status);
    }

  RETURN_IF_ERROR (demangle_prefix (dm, encode_return_type));
  /* No need to demangle the final <unqualified-name>; demangle_prefix
     will handle it.  */
  RETURN_IF_ERROR (demangle_char (dm, 'E'));

  return STATUS_OK;
}

/* Demangles and emits a <prefix>.

    <prefix>            ::= <prefix> <unqualified-name>
                        ::= <template-prefix> <template-args>
			::= # empty
			::= <substitution>

    <template-prefix>   ::= <prefix>
                        ::= <substitution>  */

static status_t
demangle_prefix (dm, encode_return_type)
     demangling_t dm;
     int *encode_return_type;
{
  int start = substitution_start (dm);
  int nested = 0;

  /* ENCODE_RETURN_TYPE is updated as we decend the nesting chain.
     After <template-args>, it is set to non-zero; after everything
     else it is set to zero.  */

  /* Generally, the return type is encoded if the function is a
     template-id, and suppressed otherwise.  There are a few cases,
     though, in which the return type is not encoded even for a
     templated function.  In these cases, this flag is set.  */
  int suppress_return_type = 0;

  DEMANGLE_TRACE ("prefix", dm);

  while (1)
    {
      char peek;

      if (end_of_name_p (dm))
	return "Unexpected end of name in <compound-name>.";

      peek = peek_char (dm);
      
      /* We'll initialize suppress_return_type to false, and set it to true
	 if we end up demangling a constructor name.  However, make
	 sure we're not actually about to demangle template arguments
	 -- if so, this is the <template-args> following a
	 <template-prefix>, so we'll want the previous flag value
	 around.  */
      if (peek != 'I')
	suppress_return_type = 0;

      if (IS_DIGIT ((unsigned char) peek)
	  || (peek >= 'a' && peek <= 'z')
	  || peek == 'C' || peek == 'D'
	  || peek == 'S')
	{
	  /* We have another level of scope qualification.  */
	  if (nested)
	    RETURN_IF_ERROR (result_add (dm, NAMESPACE_SEPARATOR));
	  else
	    nested = 1;

	  if (peek == 'S')
	    /* The substitution determines whether this is a
	       template-id.  */
	    RETURN_IF_ERROR (demangle_substitution (dm, encode_return_type));
	  else
	    {
	      /* It's just a name.  */
	      RETURN_IF_ERROR 
		(demangle_unqualified_name (dm, &suppress_return_type));
	      *encode_return_type = 0;
	    }
	}
      else if (peek == 'Z')
	RETURN_IF_ERROR (demangle_local_name (dm));
      else if (peek == 'I')
	{
	  RETURN_IF_ERROR (demangle_template_args (dm));

	  /* Now we want to indicate to the caller that we've
	     demangled template arguments, thus the prefix was a
	     <template-prefix>.  That's so that the caller knows to
	     demangle the function's return type, if this turns out to
	     be a function name.  But, if it's a member template
	     constructor or a templated conversion operator, report it
	     as untemplated.  Those never get encoded return types.  */
	  *encode_return_type = !suppress_return_type;
	}
      else if (peek == 'E')
	/* All done.  */
	return STATUS_OK;
      else
	return "Unexpected character in <compound-name>.";

      if (peek != 'S'
	  && peek_char (dm) != 'E')
	/* Add a new substitution for the prefix thus far.  */
	RETURN_IF_ERROR (substitution_add (dm, start, *encode_return_type));
    }
}

/* Demangles and emits an <unqualified-name>.  If this
   <unqualified-name> is for a special function type that should never
   have its return type encoded (particularly, a constructor or
   conversion operator), *SUPPRESS_RETURN_TYPE is set to 1; otherwise,
   it is set to zero.

    <unqualified-name>  ::= <operator-name>
			::= <special-name>  
			::= <source-name>  */

static status_t
demangle_unqualified_name (dm, suppress_return_type)
     demangling_t dm;
     int *suppress_return_type;
{
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("unqualified-name", dm);

  /* By default, don't force suppression of the return type (though
     non-template functions still don't get a return type encoded).  */ 
  *suppress_return_type = 0;

  if (IS_DIGIT ((unsigned char) peek))
    RETURN_IF_ERROR (demangle_source_name (dm));
  else if (peek >= 'a' && peek <= 'z')
    {
      int num_args;

      /* Conversion operators never have a return type encoded.  */
      if (peek == 'c' && peek_char_next (dm) == 'v')
	*suppress_return_type = 1;

      RETURN_IF_ERROR (demangle_operator_name (dm, 0, &num_args, NULL));
    }
  else if (peek == 'C' || peek == 'D')
    {
      /* Constructors never have a return type encoded.  */
      if (peek == 'C')
	*suppress_return_type = 1;

      RETURN_IF_ERROR (demangle_ctor_dtor_name (dm));
    }
  else
    return "Unexpected character in <unqualified-name>.";

  return STATUS_OK;
}

/* Demangles and emits <source-name>.  

    <source-name> ::= <length number> <identifier>  */

static status_t
demangle_source_name (dm)
     demangling_t dm;
{
  int length;

  DEMANGLE_TRACE ("source-name", dm);

  /* Decode the length of the identifier.  */
  RETURN_IF_ERROR (demangle_number (dm, &length, 10, 0));
  if (length == 0)
    return "Zero length in <source-name>.";

  /* Now the identifier itself.  It's placed into last_source_name,
     where it can be used to build a constructor or destructor name.  */
  RETURN_IF_ERROR (demangle_identifier (dm, length, 
					dm->last_source_name));

  /* Emit it.  */
  RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));

  return STATUS_OK;
}

/* Demangles a number, either a <number> or a <positive-number> at the
   current position, consuming all consecutive digit characters.  Sets
   *VALUE to the resulting numberand returns STATUS_OK.  The number is
   interpreted as BASE, which must be either 10 or 36.  If IS_SIGNED
   is non-zero, negative numbers -- prefixed with `n' -- are accepted.

    <number> ::= [n] <positive-number>

    <positive-number> ::= <decimal integer>  */

static status_t
demangle_number (dm, value, base, is_signed)
     demangling_t dm;
     int *value;
     int base;
     int is_signed;
{
  dyn_string_t number = dyn_string_new (10);

  DEMANGLE_TRACE ("number", dm);

  if (number == NULL)
    return STATUS_ALLOCATION_FAILED;

  demangle_number_literally (dm, number, base, is_signed);
  *value = strtol (dyn_string_buf (number), NULL, base);
  dyn_string_delete (number);

  return STATUS_OK;
}

/* Demangles a number at the current position.  The digits (and minus
   sign, if present) that make up the number are appended to STR.
   Only base-BASE digits are accepted; BASE must be either 10 or 36.
   If IS_SIGNED, negative numbers -- prefixed with `n' -- are
   accepted.  Does not consume a trailing underscore or other
   terminating character.  */

static status_t
demangle_number_literally (dm, str, base, is_signed)
     demangling_t dm;
     dyn_string_t str;
     int base;
     int is_signed;
{
  DEMANGLE_TRACE ("number*", dm);

  if (base != 10 && base != 36)
    return STATUS_INTERNAL_ERROR;

  /* An `n' denotes a negative number.  */
  if (is_signed && peek_char (dm) == 'n')
    {
      /* Skip past the n.  */
      advance_char (dm);
      /* The normal way to write a negative number is with a minus
	 sign.  */
      if (!dyn_string_append_char (str, '-'))
	return STATUS_ALLOCATION_FAILED;
    }

  /* Loop until we hit a non-digit.  */
  while (1)
    {
      char peek = peek_char (dm);
      if (IS_DIGIT ((unsigned char) peek)
	  || (base == 36 && peek >= 'A' && peek <= 'Z'))
	{
	  /* Accumulate digits.  */
	  if (!dyn_string_append_char (str, next_char (dm)))
	    return STATUS_ALLOCATION_FAILED;
	}
      else
	/* Not a digit?  All done.  */
	break;
    }

  return STATUS_OK;
}

/* Demangles an identifier at the current position of LENGTH
   characters and places it in IDENTIFIER.  */

static status_t
demangle_identifier (dm, length, identifier)
     demangling_t dm;
     int length;
     dyn_string_t identifier;
{
  DEMANGLE_TRACE ("identifier", dm);

  dyn_string_clear (identifier);
  if (!dyn_string_resize (identifier, length))
    return STATUS_ALLOCATION_FAILED;

  while (length-- > 0)
    {
      int ch;
      if (end_of_name_p (dm))
	return "Unexpected end of name in <identifier>.";
      ch = next_char (dm);

      /* Handle extended Unicode characters.  We encode them as __U{hex}_,
         where {hex} omits leading 0's.  For instance, '$' is encoded as
         "__U24_".  */
      if (ch == '_'
	  && peek_char (dm) == '_'
	  && peek_char_next (dm) == 'U')
	{
	  char buf[10];
	  int pos = 0;
	  advance_char (dm); advance_char (dm); length -= 2;
	  while (length-- > 0)
	    {
	      ch = next_char (dm);
	      if (!isxdigit (ch))
		break;
	      buf[pos++] = ch;
	    }
	  if (ch != '_' || length < 0)
	    return STATUS_ERROR;
	  if (pos == 0)
	    {
	      /* __U_ just means __U.  */
	      if (!dyn_string_append_cstr (identifier, "__U"))
		return STATUS_ALLOCATION_FAILED;
	      continue;
	    }
	  else
	    {
	      buf[pos] = '\0';
	      ch = strtol (buf, 0, 16);
	    }
	}

      if (!dyn_string_append_char (identifier, ch))
	return STATUS_ALLOCATION_FAILED;
    }

  /* GCC encodes anonymous namespaces using a `_GLOBAL_[_.$]N.'
     followed by the source file name and some random characters.
     Unless we're in strict mode, decipher these names appropriately.  */
  if (!flag_strict)
    {
      char *name = dyn_string_buf (identifier);
      int prefix_length = strlen (ANONYMOUS_NAMESPACE_PREFIX);

      /* Compare the first, fixed part.  */
      if (strncmp (name, ANONYMOUS_NAMESPACE_PREFIX, prefix_length) == 0)
        {
	  name += prefix_length;
	  /* The next character might be a period, an underscore, or
	     dollar sign, depending on the target architecture's
	     assembler's capabilities.  After that comes an `N'.  */
	  if ((*name == '.' || *name == '_' || *name == '$')
	      && *(name + 1) == 'N')
	    /* This looks like the anonymous namespace identifier.
	       Replace it with something comprehensible.  */
	    dyn_string_copy_cstr (identifier, "(anonymous namespace)");
	}
    }

  return STATUS_OK;
}

/* Demangles and emits an <operator-name>.  If SHORT_NAME is non-zero,
   the short form is emitted; otherwise the full source form
   (`operator +' etc.) is emitted.  *NUM_ARGS is set to the number of
   operands that the operator takes.  If TYPE_ARG is non-NULL,
   *TYPE_ARG is set to 1 if the first argument is a type and 0
   otherwise.

    <operator-name>
                  ::= nw        # new           
                  ::= na        # new[]
                  ::= dl        # delete        
                  ::= da        # delete[]      
		  ::= ps        # + (unary)
                  ::= ng        # - (unary)     
                  ::= ad        # & (unary)     
                  ::= de        # * (unary)     
                  ::= co        # ~             
                  ::= pl        # +             
                  ::= mi        # -             
                  ::= ml        # *             
                  ::= dv        # /             
                  ::= rm        # %             
                  ::= an        # &             
                  ::= or        # |             
                  ::= eo        # ^             
                  ::= aS        # =             
                  ::= pL        # +=            
                  ::= mI        # -=            
                  ::= mL        # *=            
                  ::= dV        # /=            
                  ::= rM        # %=            
                  ::= aN        # &=            
                  ::= oR        # |=            
                  ::= eO        # ^=            
                  ::= ls        # <<            
                  ::= rs        # >>            
                  ::= lS        # <<=           
                  ::= rS        # >>=           
                  ::= eq        # ==            
                  ::= ne        # !=            
                  ::= lt        # <             
                  ::= gt        # >             
                  ::= le        # <=            
                  ::= ge        # >=            
                  ::= nt        # !             
                  ::= aa        # &&            
                  ::= oo        # ||            
                  ::= pp        # ++            
                  ::= mm        # --            
                  ::= cm        # ,             
                  ::= pm        # ->*           
                  ::= pt        # ->            
                  ::= cl        # ()            
                  ::= ix        # []            
                  ::= qu        # ?
		  ::= st        # sizeof (a type)
                  ::= sz        # sizeof (an expression)
                  ::= cv <type> # cast        
		  ::= v [0-9] <source-name>  # vendor extended operator  */

static status_t
demangle_operator_name (dm, short_name, num_args, type_arg)
     demangling_t dm;
     int short_name;
     int *num_args;
     int *type_arg;
{
  struct operator_code
  {
    /* The mangled code for this operator.  */
    const char *const code;
    /* The source name of this operator.  */
    const char *const name;
    /* The number of arguments this operator takes.  */
    const int num_args;
  };

  static const struct operator_code operators[] = 
  {
    { "aN", "&="       , 2 },
    { "aS", "="        , 2 },
    { "aa", "&&"       , 2 },
    { "ad", "&"        , 1 },
    { "an", "&"        , 2 },
    { "cl", "()"       , 0 },
    { "cm", ","        , 2 },
    { "co", "~"        , 1 },
    { "dV", "/="       , 2 },
    { "da", " delete[]", 1 },
    { "de", "*"        , 1 },
    { "dl", " delete"  , 1 },
    { "dv", "/"        , 2 },
    { "eO", "^="       , 2 },
    { "eo", "^"        , 2 },
    { "eq", "=="       , 2 },
    { "ge", ">="       , 2 },
    { "gt", ">"        , 2 },
    { "ix", "[]"       , 2 },
    { "lS", "<<="      , 2 },
    { "le", "<="       , 2 },
    { "ls", "<<"       , 2 },
    { "lt", "<"        , 2 },
    { "mI", "-="       , 2 },
    { "mL", "*="       , 2 },
    { "mi", "-"        , 2 },
    { "ml", "*"        , 2 },
    { "mm", "--"       , 1 },
    { "na", " new[]"   , 1 },
    { "ne", "!="       , 2 },
    { "ng", "-"        , 1 },
    { "nt", "!"        , 1 },
    { "nw", " new"     , 1 },
    { "oR", "|="       , 2 },
    { "oo", "||"       , 2 },
    { "or", "|"        , 2 },
    { "pL", "+="       , 2 },
    { "pl", "+"        , 2 },
    { "pm", "->*"      , 2 },
    { "pp", "++"       , 1 },
    { "ps", "+"        , 1 },
    { "pt", "->"       , 2 },
    { "qu", "?"        , 3 },
    { "rM", "%="       , 2 },
    { "rS", ">>="      , 2 },
    { "rm", "%"        , 2 },
    { "rs", ">>"       , 2 },
    { "sz", "sizeof"  , 1 }
  };

  const int num_operators = 
    sizeof (operators) / sizeof (struct operator_code);

  int c0 = next_char (dm);
  int c1 = next_char (dm);
  const struct operator_code* p1 = operators;
  const struct operator_code* p2 = operators + num_operators;

  DEMANGLE_TRACE ("operator-name", dm);

  /* Assume the first argument is not a type.  */
  if (type_arg)
    *type_arg = 0;

  /* Is this a vendor-extended operator?  */
  if (c0 == 'v' && IS_DIGIT (c1))
    {
      RETURN_IF_ERROR (result_add (dm, "operator "));
      RETURN_IF_ERROR (demangle_source_name (dm));
      *num_args = 0;
      return STATUS_OK;
    }

  /* Is this a conversion operator?  */
  if (c0 == 'c' && c1 == 'v')
    {
      RETURN_IF_ERROR (result_add (dm, "operator "));
      /* Demangle the converted-to type.  */
      RETURN_IF_ERROR (demangle_type (dm));
      *num_args = 0;
      return STATUS_OK;
    }

  /* Is it the sizeof variant that takes a type?  */
  if (c0 == 's' && c1 == 't')
    {
      RETURN_IF_ERROR (result_add (dm, " sizeof"));
      *num_args = 1;
      if (type_arg)
	*type_arg = 1;
      return STATUS_OK;
    }

  /* Perform a binary search for the operator code.  */
  while (1)
    {
      const struct operator_code* p = p1 + (p2 - p1) / 2;
      char match0 = p->code[0];
      char match1 = p->code[1];

      if (c0 == match0 && c1 == match1)
	/* Found it.  */
	{
	  if (!short_name)
	    RETURN_IF_ERROR (result_add (dm, "operator"));
	  RETURN_IF_ERROR (result_add (dm, p->name));
	  *num_args = p->num_args;

	  return STATUS_OK;
	}

      if (p == p1)
	/* Couldn't find it.  */
	return "Unknown code in <operator-name>.";

      /* Try again.  */
      if (c0 < match0 || (c0 == match0 && c1 < match1))
	p2 = p;
      else
	p1 = p;
    }
}

/* Demangles and omits an <nv-offset>.

    <nv-offset> ::= <offset number>   # non-virtual base override  */

static status_t
demangle_nv_offset (dm)
     demangling_t dm;
{
  dyn_string_t number;
  status_t status = STATUS_OK;

  DEMANGLE_TRACE ("h-offset", dm);

  /* Demangle the offset.  */
  number = dyn_string_new (4);
  if (number == NULL)
    return STATUS_ALLOCATION_FAILED;
  demangle_number_literally (dm, number, 10, 1);

  /* Don't display the offset unless in verbose mode.  */
  if (flag_verbose)
    {
      status = result_add (dm, " [nv:");
      if (STATUS_NO_ERROR (status))
	status = result_add_string (dm, number);
      if (STATUS_NO_ERROR (status))
	status = result_add_char (dm, ']');
    }

  /* Clean up.  */
  dyn_string_delete (number);
  RETURN_IF_ERROR (status);
  return STATUS_OK;
}

/* Demangles and emits a <v-offset>. 

    <v-offset>  ::= <offset number> _ <virtual offset number>
			# virtual base override, with vcall offset  */

static status_t
demangle_v_offset (dm)
     demangling_t dm;
{
  dyn_string_t number;
  status_t status = STATUS_OK;

  DEMANGLE_TRACE ("v-offset", dm);

  /* Demangle the offset.  */
  number = dyn_string_new (4);
  if (number == NULL)
    return STATUS_ALLOCATION_FAILED;
  demangle_number_literally (dm, number, 10, 1);

  /* Don't display the offset unless in verbose mode.  */
  if (flag_verbose)
    {
      status = result_add (dm, " [v:");
      if (STATUS_NO_ERROR (status))
	status = result_add_string (dm, number);
      if (STATUS_NO_ERROR (status))
	result_add_char (dm, ',');
    }
  dyn_string_delete (number);
  RETURN_IF_ERROR (status);

  /* Demangle the separator.  */
  RETURN_IF_ERROR (demangle_char (dm, '_'));

  /* Demangle the vcall offset.  */
  number = dyn_string_new (4);
  if (number == NULL)
    return STATUS_ALLOCATION_FAILED;
  demangle_number_literally (dm, number, 10, 1);

  /* Don't display the vcall offset unless in verbose mode.  */
  if (flag_verbose)
    {
      status = result_add_string (dm, number);
      if (STATUS_NO_ERROR (status))
	status = result_add_char (dm, ']');
    }
  dyn_string_delete (number);
  RETURN_IF_ERROR (status);

  return STATUS_OK;
}

/* Demangles and emits a <call-offset>.

    <call-offset> ::= h <nv-offset> _
		  ::= v <v-offset> _  */

static status_t
demangle_call_offset (dm)
     demangling_t dm;
{
  DEMANGLE_TRACE ("call-offset", dm);

  switch (peek_char (dm))
    {
    case 'h':
      advance_char (dm);
      /* Demangle the offset.  */
      RETURN_IF_ERROR (demangle_nv_offset (dm));
      /* Demangle the separator.  */
      RETURN_IF_ERROR (demangle_char (dm, '_'));
      break;

    case 'v':
      advance_char (dm);
      /* Demangle the offset.  */
      RETURN_IF_ERROR (demangle_v_offset (dm));
      /* Demangle the separator.  */
      RETURN_IF_ERROR (demangle_char (dm, '_'));
      break;

    default:
      return "Unrecognized <call-offset>.";
    }

  return STATUS_OK;
}

/* Demangles and emits a <special-name>.  

    <special-name> ::= GV <object name>   # Guard variable
                   ::= TV <type>          # virtual table
                   ::= TT <type>          # VTT
                   ::= TI <type>          # typeinfo structure
		   ::= TS <type>          # typeinfo name  

   Other relevant productions include thunks:

    <special-name> ::= T <call-offset> <base encoding>
 			 # base is the nominal target function of thunk

    <special-name> ::= Tc <call-offset> <call-offset> <base encoding>
			 # base is the nominal target function of thunk
			 # first call-offset is 'this' adjustment
			 # second call-offset is result adjustment

   where

    <call-offset>  ::= h <nv-offset> _
		   ::= v <v-offset> _

   Also demangles the special g++ manglings,

    <special-name> ::= TC <type> <offset number> _ <base type>
                                          # construction vtable
		   ::= TF <type>	  # typeinfo function (old ABI only)
		   ::= TJ <type>	  # java Class structure  */

static status_t
demangle_special_name (dm)
     demangling_t dm;
{
  dyn_string_t number;
  int unused;
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("special-name", dm);

  if (peek == 'G')
    {
      /* Consume the G.  */
      advance_char (dm);
      switch (peek_char (dm))
	{
	case 'V':
	  /* A guard variable name.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "guard variable for "));
	  RETURN_IF_ERROR (demangle_name (dm, &unused));
	  break;

	case 'R':
	  /* A reference temporary.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "reference temporary for "));
	  RETURN_IF_ERROR (demangle_name (dm, &unused));
	  break;
	  
	default:
	  return "Unrecognized <special-name>.";
	}
    }
  else if (peek == 'T')
    {
      status_t status = STATUS_OK;

      /* Other C++ implementation miscellania.  Consume the T.  */
      advance_char (dm);

      switch (peek_char (dm))
	{
	case 'V':
	  /* Virtual table.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "vtable for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'T':
	  /* VTT structure.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "VTT for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'I':
	  /* Typeinfo structure.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "typeinfo for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'F':
	  /* Typeinfo function.  Used only in old ABI with new mangling.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "typeinfo fn for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'S':
	  /* Character string containing type name, used in typeinfo. */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "typeinfo name for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'J':
	  /* The java Class variable corresponding to a C++ class.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "java Class for "));
	  RETURN_IF_ERROR (demangle_type (dm));
	  break;

	case 'h':
	  /* Non-virtual thunk.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "non-virtual thunk"));
	  RETURN_IF_ERROR (demangle_nv_offset (dm));
	  /* Demangle the separator.  */
	  RETURN_IF_ERROR (demangle_char (dm, '_'));
	  /* Demangle and emit the target name and function type.  */
	  RETURN_IF_ERROR (result_add (dm, " to "));
	  RETURN_IF_ERROR (demangle_encoding (dm));
	  break;

	case 'v':
	  /* Virtual thunk.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "virtual thunk"));
	  RETURN_IF_ERROR (demangle_v_offset (dm));
	  /* Demangle the separator.  */
	  RETURN_IF_ERROR (demangle_char (dm, '_'));
	  /* Demangle and emit the target function.  */
	  RETURN_IF_ERROR (result_add (dm, " to "));
	  RETURN_IF_ERROR (demangle_encoding (dm));
	  break;

	case 'c':
	  /* Covariant return thunk.  */
	  advance_char (dm);
	  RETURN_IF_ERROR (result_add (dm, "covariant return thunk"));
	  RETURN_IF_ERROR (demangle_call_offset (dm));
	  RETURN_IF_ERROR (demangle_call_offset (dm));
	  /* Demangle and emit the target function.  */
	  RETURN_IF_ERROR (result_add (dm, " to "));
	  RETURN_IF_ERROR (demangle_encoding (dm));
	  break;

	case 'C':
	  /* TC is a special g++ mangling for a construction vtable. */
	  if (!flag_strict)
	    {
	      dyn_string_t derived_type;

	      advance_char (dm);
	      RETURN_IF_ERROR (result_add (dm, "construction vtable for "));

	      /* Demangle the derived type off to the side.  */
	      RETURN_IF_ERROR (result_push (dm));
	      RETURN_IF_ERROR (demangle_type (dm));
	      derived_type = (dyn_string_t) result_pop (dm);

	      /* Demangle the offset.  */
	      number = dyn_string_new (4);
	      if (number == NULL)
		{
		  dyn_string_delete (derived_type);
		  return STATUS_ALLOCATION_FAILED;
		}
	      demangle_number_literally (dm, number, 10, 1);
	      /* Demangle the underscore separator.  */
	      status = demangle_char (dm, '_');

	      /* Demangle the base type.  */
	      if (STATUS_NO_ERROR (status))
		status = demangle_type (dm);

	      /* Emit the derived type.  */
	      if (STATUS_NO_ERROR (status))
		status = result_add (dm, "-in-");
	      if (STATUS_NO_ERROR (status))
		status = result_add_string (dm, derived_type);
	      dyn_string_delete (derived_type);

	      /* Don't display the offset unless in verbose mode.  */
	      if (flag_verbose)
		{
		  status = result_add_char (dm, ' ');
		  if (STATUS_NO_ERROR (status))
		    result_add_string (dm, number);
		}
	      dyn_string_delete (number);
	      RETURN_IF_ERROR (status);
	      break;
	    }
	  /* If flag_strict, fall through.  */

	default:
	  return "Unrecognized <special-name>.";
	}
    }
  else
    return STATUS_ERROR;

  return STATUS_OK;
}

/* Demangles and emits a <ctor-dtor-name>.  
   
    <ctor-dtor-name>
                   ::= C1  # complete object (in-charge) ctor
                   ::= C2  # base object (not-in-charge) ctor
                   ::= C3  # complete object (in-charge) allocating ctor
                   ::= D0  # deleting (in-charge) dtor
                   ::= D1  # complete object (in-charge) dtor
                   ::= D2  # base object (not-in-charge) dtor  */

static status_t
demangle_ctor_dtor_name (dm)
     demangling_t dm;
{
  static const char *const ctor_flavors[] = 
  {
    "in-charge",
    "not-in-charge",
    "allocating"
  };
  static const char *const dtor_flavors[] = 
  {
    "in-charge deleting",
    "in-charge",
    "not-in-charge"
  };

  int flavor;
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("ctor-dtor-name", dm);
  
  if (peek == 'C')
    {
      /* A constructor name.  Consume the C.  */
      advance_char (dm);
      flavor = next_char (dm);
      if (flavor < '1' || flavor > '3')
	return "Unrecognized constructor.";
      RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));
      switch (flavor)
	{
	case '1': dm->is_constructor = gnu_v3_complete_object_ctor;
	  break;
	case '2': dm->is_constructor = gnu_v3_base_object_ctor;
	  break;
	case '3': dm->is_constructor = gnu_v3_complete_object_allocating_ctor;
	  break;
	}
      /* Print the flavor of the constructor if in verbose mode.  */
      if (flag_verbose)
	{
	  RETURN_IF_ERROR (result_add (dm, "["));
	  RETURN_IF_ERROR (result_add (dm, ctor_flavors[flavor - '1']));
	  RETURN_IF_ERROR (result_add_char (dm, ']'));
	}
    }
  else if (peek == 'D')
    {
      /* A destructor name.  Consume the D.  */
      advance_char (dm);
      flavor = next_char (dm);
      if (flavor < '0' || flavor > '2')
	return "Unrecognized destructor.";
      RETURN_IF_ERROR (result_add_char (dm, '~'));
      RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));
      switch (flavor)
	{
	case '0': dm->is_destructor = gnu_v3_deleting_dtor;
	  break;
	case '1': dm->is_destructor = gnu_v3_complete_object_dtor;
	  break;
	case '2': dm->is_destructor = gnu_v3_base_object_dtor;
	  break;
	}
      /* Print the flavor of the destructor if in verbose mode.  */
      if (flag_verbose)
	{
	  RETURN_IF_ERROR (result_add (dm, " ["));
	  RETURN_IF_ERROR (result_add (dm, dtor_flavors[flavor - '0']));
	  RETURN_IF_ERROR (result_add_char (dm, ']'));
	}
    }
  else
    return STATUS_ERROR;

  return STATUS_OK;
}

/* Handle pointer, reference, and pointer-to-member cases for
   demangle_type.  All consecutive `P's, `R's, and 'M's are joined to
   build a pointer/reference type.  We snarf all these, plus the
   following <type>, all at once since we need to know whether we have
   a pointer to data or pointer to function to construct the right
   output syntax.  C++'s pointer syntax is hairy.  

   This function adds substitution candidates for every nested
   pointer/reference type it processes, including the outermost, final
   type, assuming the substitution starts at SUBSTITUTION_START in the
   demangling result.  For example, if this function demangles
   `PP3Foo', it will add a substitution for `Foo', `Foo*', and
   `Foo**', in that order.

   *INSERT_POS is a quantity used internally, when this function calls
   itself recursively, to figure out where to insert pointer
   punctuation on the way up.  On entry to this function, INSERT_POS
   should point to a temporary value, but that value need not be
   initialized.

     <type> ::= P <type>
            ::= R <type>
            ::= <pointer-to-member-type>

     <pointer-to-member-type> ::= M </class/ type> </member/ type>  */

static status_t
demangle_type_ptr (dm, insert_pos, substitution_start)
     demangling_t dm;
     int *insert_pos;
     int substitution_start;
{
  status_t status;
  int is_substitution_candidate = 1;

  DEMANGLE_TRACE ("type*", dm);

  /* Scan forward, collecting pointers and references into symbols,
     until we hit something else.  Then emit the type.  */
  switch (peek_char (dm))
    {
    case 'P':
      /* A pointer.  Snarf the `P'.  */
      advance_char (dm);
      /* Demangle the underlying type.  */
      RETURN_IF_ERROR (demangle_type_ptr (dm, insert_pos, 
					  substitution_start));
      /* Insert an asterisk where we're told to; it doesn't
	 necessarily go at the end.  If we're doing Java style output, 
	 there is no pointer symbol.  */
      if (dm->style != DMGL_JAVA)
	RETURN_IF_ERROR (result_insert_char (dm, *insert_pos, '*'));
      /* The next (outermost) pointer or reference character should go
	 after this one.  */
      ++(*insert_pos);
      break;

    case 'R':
      /* A reference.  Snarf the `R'.  */
      advance_char (dm);
      /* Demangle the underlying type.  */
      RETURN_IF_ERROR (demangle_type_ptr (dm, insert_pos, 
					  substitution_start));
      /* Insert an ampersand where we're told to; it doesn't
	 necessarily go at the end.  */
      RETURN_IF_ERROR (result_insert_char (dm, *insert_pos, '&'));
      /* The next (outermost) pointer or reference character should go
	 after this one.  */
      ++(*insert_pos);
      break;

    case 'M':
    {
      /* A pointer-to-member.  */
      dyn_string_t class_type;
      char peek;
      int reset_caret = 0;
      int old_caret_position;
      
      /* Eat the 'M'.  */
      advance_char (dm);
      
      /* Capture the type of which this is a pointer-to-member.  */
      RETURN_IF_ERROR (result_push (dm));
      RETURN_IF_ERROR (demangle_type (dm));
      class_type = (dyn_string_t) result_pop (dm);
      
      peek = peek_char (dm);
      old_caret_position = result_get_caret (dm);
      if (peek == 'r' || peek == 'V' || peek == 'K')
	{
	  dyn_string_t cv_qualifiers = dyn_string_new (24);
	  status_t status;

	  if (cv_qualifiers == NULL)
	    return STATUS_ALLOCATION_FAILED;

	  /* Decode all adjacent CV qualifiers.  */
	  demangle_CV_qualifiers (dm, cv_qualifiers);

	  /* Emit them, and shift the caret left so that the
	     underlying type will be emitted before the
	     qualifiers.  */
	  status = result_add_string (dm, cv_qualifiers);
	  result_shift_caret (dm, -dyn_string_length (cv_qualifiers));

	  dyn_string_delete (cv_qualifiers);
	  RETURN_IF_ERROR (status);
	  /* Prepend a blank.  */
	  RETURN_IF_ERROR (result_add_char (dm, ' '));
	  result_shift_caret (dm, -1);

	  peek = peek_char (dm);
	  reset_caret = 1;
	}

      if (peek == 'F')
	/* A pointer-to-member function.  We want output along the
	   lines of `void (C::*) (int, int)'.  Demangle the function
	   type, which would in this case give `void () (int, int)'
	   and set *insert_pos to the spot between the first
	   parentheses.  */
	status = demangle_type_ptr (dm, insert_pos, substitution_start);
      else if (peek == 'A')
	/* A pointer-to-member array variable.  We want output that
	   looks like `int (Klass::*) [10]'.  Demangle the array type
	   as `int () [10]', and set *insert_pos to the spot between
	   the parentheses.  */
	status = demangle_array_type (dm, insert_pos);
      else
        {
	  /* A pointer-to-member variable.  Demangle the type of the
             pointed-to member.  */
	  status = demangle_type (dm);
	  /* Make it pretty.  */
	  if (STATUS_NO_ERROR (status)
	      && !result_previous_char_is_space (dm))
	    status = result_add_char (dm, ' ');
	  /* The pointer-to-member notation (e.g. `C::*') follows the
             member's type.  */
	  *insert_pos = result_caret_pos (dm);
	}

      /* Build the pointer-to-member notation.  */
      if (STATUS_NO_ERROR (status))
	status = result_insert (dm, *insert_pos, "::*");
      if (STATUS_NO_ERROR (status))
	status = result_insert_string (dm, *insert_pos, class_type);
      /* There may be additional levels of (pointer or reference)
	 indirection in this type.  If so, the `*' and `&' should be
	 added after the pointer-to-member notation (e.g. `C::*&' for
	 a reference to a pointer-to-member of class C).  */
      *insert_pos += dyn_string_length (class_type) + 3;

      /* Clean up. */
      dyn_string_delete (class_type);

      if (reset_caret)
	result_set_caret (dm, old_caret_position);

      RETURN_IF_ERROR (status);
    }
    break;

    case 'F':
      /* Ooh, tricky, a pointer-to-function.  When we demangle the
	 function type, the return type should go at the very
	 beginning.  */
      *insert_pos = result_caret_pos (dm);
      /* The parentheses indicate this is a function pointer or
	 reference type.  */
      RETURN_IF_ERROR (result_add (dm, "()"));
      /* Now demangle the function type.  The return type will be
	 inserted before the `()', and the argument list will go after
	 it.  */
      RETURN_IF_ERROR (demangle_function_type (dm, insert_pos));
      /* We should now have something along the lines of 
	 `void () (int, int)'.  The pointer or reference characters
	 have to inside the first set of parentheses.  *insert_pos has
	 already been updated to point past the end of the return
	 type.  Move it one character over so it points inside the
	 `()'.  */
      ++(*insert_pos);
      break;

    case 'A':
      /* An array pointer or reference.  demangle_array_type will figure
	 out where the asterisks and ampersands go.  */
      RETURN_IF_ERROR (demangle_array_type (dm, insert_pos));
      break;

    case 'r':
    case 'V':
    case 'K':
      /* Qualified base type.  Pick up the qualifiers.  */
      {
	dyn_string_t cv_qualifiers = dyn_string_new (24);

	if (cv_qualifiers == NULL)
	  return STATUS_ALLOCATION_FAILED;

	/* Pick up all adjacent CV qualifiers.  */
	demangle_CV_qualifiers (dm, cv_qualifiers);

	/* Demangle the underlying type.  */
	status = demangle_type_ptr (dm, insert_pos, substitution_start);

	/* Insert the qualifiers where we're told to.  */
	if (STATUS_NO_ERROR (status))
	  {
	    status = result_insert_char (dm, *insert_pos, ' ');
	    ++(*insert_pos);
	    if (STATUS_NO_ERROR (status))
	      status = result_insert_string (dm, *insert_pos, cv_qualifiers);
	  }

	/* The next character should go after the qualifiers.  */
	*insert_pos += dyn_string_length (cv_qualifiers);

	dyn_string_delete (cv_qualifiers);
	RETURN_IF_ERROR (status);
      }
      break;

    default:
      /* No more pointer or reference tokens; this is therefore a
	 pointer to data.  Finish up by demangling the underlying
	 type.  */
      RETURN_IF_ERROR (demangle_type (dm));
      /* The pointer or reference characters follow the underlying
	 type, as in `int*&'.  */
      *insert_pos = result_caret_pos (dm);
      /* Because of the production <type> ::= <substitution>,
	 demangle_type will already have added the underlying type as
	 a substitution candidate.  Don't do it again.  */
      is_substitution_candidate = 0;
      break;
    }
  
  if (is_substitution_candidate)
    RETURN_IF_ERROR (substitution_add (dm, substitution_start, 0));
  
  return STATUS_OK;
}

/* Demangles and emits a <type>.  

    <type> ::= <builtin-type>
	   ::= <function-type>
	   ::= <class-enum-type>
	   ::= <array-type>
	   ::= <pointer-to-member-type>
	   ::= <template-param>
	   ::= <template-template-param> <template-args>
           ::= <CV-qualifiers> <type>
	   ::= P <type>   # pointer-to
	   ::= R <type>   # reference-to
	   ::= C <type>   # complex pair (C 2000)
	   ::= G <type>   # imaginary (C 2000)
	   ::= U <source-name> <type>     # vendor extended type qualifier
	   ::= <substitution>  */

static status_t
demangle_type (dm)
     demangling_t dm;
{
  int start = substitution_start (dm);
  char peek = peek_char (dm);
  char peek_next;
  int encode_return_type = 0;
  template_arg_list_t old_arg_list = current_template_arg_list (dm);
  int insert_pos;

  /* A <type> can be a <substitution>; therefore, this <type> is a
     substitution candidate unless a special condition holds (see
     below).  */
  int is_substitution_candidate = 1;

  DEMANGLE_TRACE ("type", dm);

  /* A <class-enum-type> can start with a digit (a <source-name>), an
     N (a <nested-name>), or a Z (a <local-name>).  */
  if (IS_DIGIT ((unsigned char) peek) || peek == 'N' || peek == 'Z')
    RETURN_IF_ERROR (demangle_class_enum_type (dm, &encode_return_type));
  /* Lower-case letters begin <builtin-type>s, except for `r', which
     denotes restrict.  */
  else if (peek >= 'a' && peek <= 'z' && peek != 'r')
    {
      RETURN_IF_ERROR (demangle_builtin_type (dm));
      /* Built-in types are not substitution candidates.  */
      is_substitution_candidate = 0;
    }
  else
    switch (peek)
      {
      case 'r':
      case 'V':
      case 'K':
	/* CV-qualifiers (including restrict).  We have to demangle
	   them off to the side, since C++ syntax puts them in a funny
	   place for qualified pointer and reference types.  */
	{
	  status_t status;
	  dyn_string_t cv_qualifiers = dyn_string_new (24);
	  int old_caret_position = result_get_caret (dm);

	  if (cv_qualifiers == NULL)
	    return STATUS_ALLOCATION_FAILED;

	  /* Decode all adjacent CV qualifiers.  */
	  demangle_CV_qualifiers (dm, cv_qualifiers);

	  /* If the underlying type is a pointer or reference type, we
	     need to call demangle_type_ptr to find out where to put
	     the qualifiers.  */
	  peek = peek_char (dm);
	  if (peek == 'P' || peek == 'R' || peek == 'M')
	    {
	      status = demangle_type_ptr (dm, &insert_pos,
					  substitution_start (dm));
	      if (STATUS_NO_ERROR (status))
		{
		  status = result_insert_char (dm, insert_pos, ' ');
		  if (STATUS_NO_ERROR (status))
		    status = result_insert_string (dm, insert_pos + 1,
						   cv_qualifiers);
		}
	      dyn_string_delete (cv_qualifiers);
	      RETURN_IF_ERROR (status);
	    }
	  else
	    {
	      /* Emit the qualifiers, and shift the caret left so that
		 the underlying type will be emitted first.  */
	      status = result_add_string (dm, cv_qualifiers);
	      result_shift_caret (dm, -dyn_string_length (cv_qualifiers));
	      /* Clean up.  */
	      dyn_string_delete (cv_qualifiers);
	      RETURN_IF_ERROR (status);
	      /* Also prepend a blank, if needed.  */
	      RETURN_IF_ERROR (result_add_char (dm, ' '));
	      result_shift_caret (dm, -1);

	      /* Demangle the underlying type.  It will be emitted before
		 the CV qualifiers, since we moved the caret.  */
	      RETURN_IF_ERROR (demangle_type (dm));

	      /* Put the caret back where it was previously.  */
	      result_set_caret (dm, old_caret_position);
	    }
	}
	break;

      case 'F':
	/* The return type should go at the current position.  */
	insert_pos = result_caret_pos (dm);
	/* Put in parentheses to indicate that this is a function.  */
	RETURN_IF_ERROR (result_add (dm, "()"));
	/* Demangle the function type.  The return type will be
	   inserted before the '()', and the argument list will go
	   after it.  */
	RETURN_IF_ERROR (demangle_function_type (dm, &insert_pos));
	break;

      case 'A':
	RETURN_IF_ERROR (demangle_array_type (dm, NULL));
	break;

      case 'T':
	/* It's either a <template-param> or a
	   <template-template-param>.  In either case, demangle the
	   `T' token first.  */
	RETURN_IF_ERROR (demangle_template_param (dm));

	/* Check for a template argument list; if one is found, it's a
	     <template-template-param> ::= <template-param>
                                       ::= <substitution>  */
	if (peek_char (dm) == 'I')
	  {
	    /* Add a substitution candidate.  The template parameter
	       `T' token is a substitution candidate by itself,
	       without the template argument list.  */
	    RETURN_IF_ERROR (substitution_add (dm, start, encode_return_type));

	    /* Now demangle the template argument list.  */
	    RETURN_IF_ERROR (demangle_template_args (dm));
	    /* The entire type, including the template template
	       parameter and its argument list, will be added as a
	       substitution candidate below.  */
	  }

	break;

      case 'S':
	/* First check if this is a special substitution.  If it is,
	   this is a <class-enum-type>.  Special substitutions have a
	   lower-case letter following the `S'; other substitutions
	   have a digit, upper-case letter, or underscore.  */
	peek_next = peek_char_next (dm);
	if (IS_DIGIT (peek_next) 
	    || (peek_next >= 'A' && peek_next <= 'Z')
	    || peek_next == '_')
	  {
	    RETURN_IF_ERROR (demangle_substitution (dm, &encode_return_type));
	    
	    /* The substituted name may have been a template name.
	       Check if template arguments follow, and if so, demangle
	       them.  */
	    if (peek_char (dm) == 'I')
	      RETURN_IF_ERROR (demangle_template_args (dm));
	    else
	      /* A substitution token is not itself a substitution
		 candidate.  (However, if the substituted template is
		 instantiated, the resulting type is.)  */
	      is_substitution_candidate = 0;
	  }
	else
	  {
	    /* Now some trickiness.  We have a special substitution
	       here.  Often, the special substitution provides the
	       name of a template that's subsequently instantiated,
	       for instance `SaIcE' => std::allocator<char>.  In these
	       cases we need to add a substitution candidate for the
	       entire <class-enum-type> and thus don't want to clear
	       the is_substitution_candidate flag.

	       However, it's possible that what we have here is a
	       substitution token representing an entire type, such as
	       `Ss' => std::string.  In this case, we mustn't add a
	       new substitution candidate for this substitution token.
	       To detect this case, remember where the start of the
	       substitution token is.  */
 	    const char *next = dm->next;
	    /* Now demangle the <class-enum-type>.  */
	    RETURN_IF_ERROR 
	      (demangle_class_enum_type (dm, &encode_return_type));
	    /* If all that was just demangled is the two-character
	       special substitution token, supress the addition of a
	       new candidate for it.  */
	    if (dm->next == next + 2)
	      is_substitution_candidate = 0;
	  }

	break;

      case 'P':
      case 'R':
      case 'M':
	RETURN_IF_ERROR (demangle_type_ptr (dm, &insert_pos, start));
	/* demangle_type_ptr adds all applicable substitution
	   candidates.  */
	is_substitution_candidate = 0;
	break;

      case 'C':
	/* A C99 complex type.  */
	RETURN_IF_ERROR (result_add (dm, "complex "));
	advance_char (dm);
	RETURN_IF_ERROR (demangle_type (dm));
	break;

      case 'G':
	/* A C99 imaginary type.  */
	RETURN_IF_ERROR (result_add (dm, "imaginary "));
	advance_char (dm);
	RETURN_IF_ERROR (demangle_type (dm));
	break;

      case 'U':
	/* Vendor-extended type qualifier.  */
	advance_char (dm);
	RETURN_IF_ERROR (demangle_source_name (dm));
	RETURN_IF_ERROR (result_add_char (dm, ' '));
	RETURN_IF_ERROR (demangle_type (dm));
	break;

      default:
	return "Unexpected character in <type>.";
      }

  if (is_substitution_candidate)
    /* Add a new substitution for the type. If this type was a
       <template-param>, pass its index since from the point of
       substitutions; a <template-param> token is a substitution
       candidate distinct from the type that is substituted for it.  */
    RETURN_IF_ERROR (substitution_add (dm, start, encode_return_type));

  /* Pop off template argument lists added during mangling of this
     type.  */
  pop_to_template_arg_list (dm, old_arg_list);

  return STATUS_OK;
}

/* C++ source names of builtin types, indexed by the mangled code
   letter's position in the alphabet ('a' -> 0, 'b' -> 1, etc).  */
static const char *const builtin_type_names[26] = 
{
  "signed char",              /* a */
  "bool",                     /* b */
  "char",                     /* c */
  "double",                   /* d */
  "long double",              /* e */
  "float",                    /* f */
  "__float128",               /* g */
  "unsigned char",            /* h */
  "int",                      /* i */
  "unsigned",                 /* j */
  NULL,                       /* k */
  "long",                     /* l */
  "unsigned long",            /* m */
  "__int128",                 /* n */
  "unsigned __int128",        /* o */
  NULL,                       /* p */
  NULL,                       /* q */
  NULL,                       /* r */
  "short",                    /* s */
  "unsigned short",           /* t */
  NULL,                       /* u */
  "void",                     /* v */
  "wchar_t",                  /* w */
  "long long",                /* x */
  "unsigned long long",       /* y */
  "..."                       /* z */
};

/* Java source names of builtin types.  Types that arn't valid in Java
   are also included here - we don't fail if someone attempts to demangle a 
   C++ symbol in Java style. */
static const char *const java_builtin_type_names[26] = 
{
  "signed char",                /* a */
  "boolean", /* C++ "bool" */   /* b */
  "byte", /* C++ "char" */      /* c */
  "double",                     /* d */
  "long double",                /* e */
  "float",                      /* f */
  "__float128",                 /* g */
  "unsigned char",              /* h */
  "int",                        /* i */
  "unsigned",                   /* j */
  NULL,                         /* k */
  "long",                       /* l */
  "unsigned long",              /* m */
  "__int128",                   /* n */
  "unsigned __int128",          /* o */
  NULL,                         /* p */
  NULL,                         /* q */
  NULL,                         /* r */
  "short",                      /* s */
  "unsigned short",             /* t */
  NULL,                         /* u */
  "void",                       /* v */
  "char", /* C++ "wchar_t" */   /* w */
  "long", /* C++ "long long" */ /* x */
  "unsigned long long",         /* y */
  "..."                         /* z */
};

/* Demangles and emits a <builtin-type>.  

    <builtin-type> ::= v  # void
		   ::= w  # wchar_t
		   ::= b  # bool
		   ::= c  # char
		   ::= a  # signed char
		   ::= h  # unsigned char
		   ::= s  # short
		   ::= t  # unsigned short
		   ::= i  # int
		   ::= j  # unsigned int
		   ::= l  # long
		   ::= m  # unsigned long
		   ::= x  # long long, __int64
		   ::= y  # unsigned long long, __int64
		   ::= n  # __int128
		   ::= o  # unsigned __int128
		   ::= f  # float
		   ::= d  # double
		   ::= e  # long double, __float80
		   ::= g  # __float128
		   ::= z  # ellipsis
		   ::= u <source-name>    # vendor extended type  */

static status_t
demangle_builtin_type (dm)
     demangling_t dm;
{

  char code = peek_char (dm);

  DEMANGLE_TRACE ("builtin-type", dm);

  if (code == 'u')
    {
      advance_char (dm);
      RETURN_IF_ERROR (demangle_source_name (dm));
      return STATUS_OK;
    }
  else if (code >= 'a' && code <= 'z')
    {
      const char *type_name;
      /* Java uses different names for some built-in types. */
      if (dm->style == DMGL_JAVA)
        type_name = java_builtin_type_names[code - 'a'];
      else
        type_name = builtin_type_names[code - 'a'];
      if (type_name == NULL)
	return "Unrecognized <builtin-type> code.";

      RETURN_IF_ERROR (result_add (dm, type_name));
      advance_char (dm);
      return STATUS_OK;
    }
  else
    return "Non-alphabetic <builtin-type> code.";
}

/* Demangles all consecutive CV-qualifiers (const, volatile, and
   restrict) at the current position.  The qualifiers are appended to
   QUALIFIERS.  Returns STATUS_OK.  */

static status_t
demangle_CV_qualifiers (dm, qualifiers)
     demangling_t dm;
     dyn_string_t qualifiers;
{
  DEMANGLE_TRACE ("CV-qualifiers", dm);

  while (1)
    {
      switch (peek_char (dm))
	{
	case 'r':
	  if (!dyn_string_append_space (qualifiers))
	    return STATUS_ALLOCATION_FAILED;
	  if (!dyn_string_append_cstr (qualifiers, "restrict"))
	    return STATUS_ALLOCATION_FAILED;
	  break;

	case 'V':
	  if (!dyn_string_append_space (qualifiers))
	    return STATUS_ALLOCATION_FAILED;
	  if (!dyn_string_append_cstr (qualifiers, "volatile"))
	    return STATUS_ALLOCATION_FAILED;
	  break;

	case 'K':
	  if (!dyn_string_append_space (qualifiers))
	    return STATUS_ALLOCATION_FAILED;
	  if (!dyn_string_append_cstr (qualifiers, "const"))
	    return STATUS_ALLOCATION_FAILED;
	  break;

	default:
	  return STATUS_OK;
	}

      advance_char (dm);
    }
}

/* Demangles and emits a <function-type>.  *FUNCTION_NAME_POS is the
   position in the result string of the start of the function
   identifier, at which the function's return type will be inserted;
   *FUNCTION_NAME_POS is updated to position past the end of the
   function's return type.

    <function-type> ::= F [Y] <bare-function-type> E  */

static status_t
demangle_function_type (dm, function_name_pos)
     demangling_t dm;
     int *function_name_pos;
{
  DEMANGLE_TRACE ("function-type", dm);
  RETURN_IF_ERROR (demangle_char (dm, 'F'));  
  if (peek_char (dm) == 'Y')
    {
      /* Indicate this function has C linkage if in verbose mode.  */
      if (flag_verbose)
	RETURN_IF_ERROR (result_add (dm, " [extern \"C\"] "));
      advance_char (dm);
    }
  RETURN_IF_ERROR (demangle_bare_function_type (dm, function_name_pos));
  RETURN_IF_ERROR (demangle_char (dm, 'E'));
  return STATUS_OK;
}

/* Demangles and emits a <bare-function-type>.  RETURN_TYPE_POS is the
   position in the result string at which the function return type
   should be inserted.  If RETURN_TYPE_POS is BFT_NO_RETURN_TYPE, the
   function's return type is assumed not to be encoded.  

    <bare-function-type> ::= <signature type>+  */

static status_t
demangle_bare_function_type (dm, return_type_pos)
     demangling_t dm;
     int *return_type_pos;
{
  /* Sequence is the index of the current function parameter, counting
     from zero.  The value -1 denotes the return type.  */
  int sequence = 
    (return_type_pos == BFT_NO_RETURN_TYPE ? 0 : -1);

  DEMANGLE_TRACE ("bare-function-type", dm);

  RETURN_IF_ERROR (result_add_char (dm, '('));
  while (!end_of_name_p (dm) && peek_char (dm) != 'E')
    {
      if (sequence == -1)
	/* We're decoding the function's return type.  */
	{
	  dyn_string_t return_type;
	  status_t status = STATUS_OK;

	  /* Decode the return type off to the side.  */
	  RETURN_IF_ERROR (result_push (dm));
	  RETURN_IF_ERROR (demangle_type (dm));
	  return_type = (dyn_string_t) result_pop (dm);

	  /* Add a space to the end of the type.  Insert the return
             type where we've been asked to. */
	  if (!dyn_string_append_space (return_type))
	    status = STATUS_ALLOCATION_FAILED;
	  if (STATUS_NO_ERROR (status))
	    {
	      if (!dyn_string_insert (result_string (dm), *return_type_pos, 
				      return_type))
		status = STATUS_ALLOCATION_FAILED;
	      else
		*return_type_pos += dyn_string_length (return_type);
	    }

	  dyn_string_delete (return_type);
	  RETURN_IF_ERROR (status);
	}
      else 
	{
	  /* Skip `void' parameter types.  One should only occur as
	     the only type in a parameter list; in that case, we want
	     to print `foo ()' instead of `foo (void)'.  */
	  if (peek_char (dm) == 'v')
	    /* Consume the v.  */
	    advance_char (dm);
	  else
	    {
	      /* Separate parameter types by commas.  */
	      if (sequence > 0)
		RETURN_IF_ERROR (result_add (dm, ", "));
	      /* Demangle the type.  */
	      RETURN_IF_ERROR (demangle_type (dm));
	    }
	}

      ++sequence;
    }
  RETURN_IF_ERROR (result_add_char (dm, ')'));

  /* We should have demangled at least one parameter type (which would
     be void, for a function that takes no parameters), plus the
     return type, if we were supposed to demangle that.  */
  if (sequence == -1)
    return "Missing function return type.";
  else if (sequence == 0)
    return "Missing function parameter.";

  return STATUS_OK;
}

/* Demangles and emits a <class-enum-type>.  *ENCODE_RETURN_TYPE is set to
   non-zero if the type is a template-id, zero otherwise.  

    <class-enum-type> ::= <name>  */

static status_t
demangle_class_enum_type (dm, encode_return_type)
     demangling_t dm;
     int *encode_return_type;
{
  DEMANGLE_TRACE ("class-enum-type", dm);

  RETURN_IF_ERROR (demangle_name (dm, encode_return_type));
  return STATUS_OK;
}

/* Demangles and emits an <array-type>.  

   If PTR_INSERT_POS is not NULL, the array type is formatted as a
   pointer or reference to an array, except that asterisk and
   ampersand punctuation is omitted (since it's not know at this
   point).  *PTR_INSERT_POS is set to the position in the demangled
   name at which this punctuation should be inserted.  For example,
   `A10_i' is demangled to `int () [10]' and *PTR_INSERT_POS points
   between the parentheses.

   If PTR_INSERT_POS is NULL, the array type is assumed not to be
   pointer- or reference-qualified.  Then, for example, `A10_i' is
   demangled simply as `int[10]'.  

    <array-type> ::= A [<dimension number>] _ <element type>  
                 ::= A <dimension expression> _ <element type>  */

static status_t
demangle_array_type (dm, ptr_insert_pos)
     demangling_t dm;
     int *ptr_insert_pos;
{
  status_t status = STATUS_OK;
  dyn_string_t array_size = NULL;
  char peek;

  DEMANGLE_TRACE ("array-type", dm);

  RETURN_IF_ERROR (demangle_char (dm, 'A'));

  /* Demangle the array size into array_size.  */
  peek = peek_char (dm);
  if (peek == '_')
    /* Array bound is omitted.  This is a C99-style VLA.  */
    ;
  else if (IS_DIGIT (peek_char (dm))) 
    {
      /* It looks like a constant array bound.  */
      array_size = dyn_string_new (10);
      if (array_size == NULL)
	return STATUS_ALLOCATION_FAILED;
      status = demangle_number_literally (dm, array_size, 10, 0);
    }
  else
    {
      /* Anything is must be an expression for a nont-constant array
	 bound.  This happens if the array type occurs in a template
	 and the array bound references a template parameter.  */
      RETURN_IF_ERROR (result_push (dm));
      RETURN_IF_ERROR (demangle_expression (dm));
      array_size = (dyn_string_t) result_pop (dm);
    }
  /* array_size may have been allocated by now, so we can't use
     RETURN_IF_ERROR until it's been deallocated.  */

  /* Demangle the base type of the array.  */
  if (STATUS_NO_ERROR (status))
    status = demangle_char (dm, '_');
  if (STATUS_NO_ERROR (status))
    status = demangle_type (dm);

  if (ptr_insert_pos != NULL)
    {
      /* This array is actually part of an pointer- or
	 reference-to-array type.  Format appropriately, except we
	 don't know which and how much punctuation to use.  */
      if (STATUS_NO_ERROR (status))
	status = result_add (dm, " () ");
      /* Let the caller know where to insert the punctuation.  */
      *ptr_insert_pos = result_caret_pos (dm) - 2;
    }

  /* Emit the array dimension syntax.  */
  if (STATUS_NO_ERROR (status))
    status = result_add_char (dm, '[');
  if (STATUS_NO_ERROR (status) && array_size != NULL)
    status = result_add_string (dm, array_size);
  if (STATUS_NO_ERROR (status))
    status = result_add_char (dm, ']');
  if (array_size != NULL)
    dyn_string_delete (array_size);
  
  RETURN_IF_ERROR (status);

  return STATUS_OK;
}

/* Demangles and emits a <template-param>.  

    <template-param> ::= T_       # first template parameter
                     ::= T <parameter-2 number> _  */

static status_t
demangle_template_param (dm)
     demangling_t dm;
{
  int parm_number;
  template_arg_list_t current_arg_list = current_template_arg_list (dm);
  string_list_t arg;

  DEMANGLE_TRACE ("template-param", dm);

  /* Make sure there is a template argmust list in which to look up
     this parameter reference.  */
  if (current_arg_list == NULL)
    return "Template parameter outside of template.";

  RETURN_IF_ERROR (demangle_char (dm, 'T'));
  if (peek_char (dm) == '_')
    parm_number = 0;
  else
    {
      RETURN_IF_ERROR (demangle_number (dm, &parm_number, 10, 0));
      ++parm_number;
    }
  RETURN_IF_ERROR (demangle_char (dm, '_'));

  arg = template_arg_list_get_arg (current_arg_list, parm_number);
  if (arg == NULL)
    /* parm_number exceeded the number of arguments in the current
       template argument list.  */
    return "Template parameter number out of bounds.";
  RETURN_IF_ERROR (result_add_string (dm, (dyn_string_t) arg));

  return STATUS_OK;
}

/* Demangles and emits a <template-args>.  

    <template-args> ::= I <template-arg>+ E  */

static status_t
demangle_template_args (dm)
     demangling_t dm;
{
  int first = 1;
  dyn_string_t old_last_source_name;
  template_arg_list_t arg_list = template_arg_list_new ();

  if (arg_list == NULL)
    return STATUS_ALLOCATION_FAILED;

  /* Preserve the most recently demangled source name.  */
  old_last_source_name = dm->last_source_name;
  dm->last_source_name = dyn_string_new (0);

  DEMANGLE_TRACE ("template-args", dm);

  if (dm->last_source_name == NULL)
    return STATUS_ALLOCATION_FAILED;

  RETURN_IF_ERROR (demangle_char (dm, 'I'));
  RETURN_IF_ERROR (result_open_template_list (dm));
  do
    {
      string_list_t arg;

      if (first)
	first = 0;
      else
	RETURN_IF_ERROR (result_add (dm, ", "));

      /* Capture the template arg.  */
      RETURN_IF_ERROR (result_push (dm));
      RETURN_IF_ERROR (demangle_template_arg (dm));
      arg = result_pop (dm);

      /* Emit it in the demangled name.  */
      RETURN_IF_ERROR (result_add_string (dm, (dyn_string_t) arg));

      /* Save it for use in expanding <template-param>s.  */
      template_arg_list_add_arg (arg_list, arg);
    }
  while (peek_char (dm) != 'E');
  /* Append the '>'.  */
  RETURN_IF_ERROR (result_close_template_list (dm));

  /* Consume the 'E'.  */
  advance_char (dm);

  /* Restore the most recent demangled source name.  */
  dyn_string_delete (dm->last_source_name);
  dm->last_source_name = old_last_source_name;

  /* Push the list onto the top of the stack of template argument
     lists, so that arguments from it are used from now on when
     expanding <template-param>s.  */
  push_template_arg_list (dm, arg_list);

  return STATUS_OK;
}

/* This function, which does not correspond to a production in the
   mangling spec, handles the `literal' production for both
   <template-arg> and <expr-primary>.  It does not expect or consume
   the initial `L' or final `E'.  The demangling is given by:

     <literal> ::= <type> </value/ number>

   and the emitted output is `(type)number'.  */

static status_t
demangle_literal (dm)
     demangling_t dm;
{
  char peek = peek_char (dm);
  dyn_string_t value_string;
  status_t status;

  DEMANGLE_TRACE ("literal", dm);

  if (!flag_verbose && peek >= 'a' && peek <= 'z')
    {
      /* If not in verbose mode and this is a builtin type, see if we
	 can produce simpler numerical output.  In particular, for
	 integer types shorter than `long', just write the number
	 without type information; for bools, write `true' or `false'.
	 Other refinements could be made here too.  */

      /* This constant string is used to map from <builtin-type> codes
	 (26 letters of the alphabet) to codes that determine how the 
	 value will be displayed.  The codes are:
	   b: display as bool
	   i: display as int
           l: display as long
	 A space means the value will be represented using cast
	 notation. */
      static const char *const code_map = "ibi    iii ll     ii  i  ";

      char code = code_map[peek - 'a'];
      /* FIXME: Implement demangling of floats and doubles.  */
      if (code == 'u')
	return STATUS_UNIMPLEMENTED;
      if (code == 'b')
	{
	  /* It's a boolean.  */
	  char value;

	  /* Consume the b.  */
	  advance_char (dm);
	  /* Look at the next character.  It should be 0 or 1,
	     corresponding to false or true, respectively.  */
	  value = peek_char (dm);
	  if (value == '0')
	    RETURN_IF_ERROR (result_add (dm, "false"));
	  else if (value == '1')
	    RETURN_IF_ERROR (result_add (dm, "true"));
	  else
	    return "Unrecognized bool constant.";
	  /* Consume the 0 or 1.  */
	  advance_char (dm);
	  return STATUS_OK;
	}
      else if (code == 'i' || code == 'l')
	{
	  /* It's an integer or long.  */

	  /* Consume the type character.  */
	  advance_char (dm);

	  /* Demangle the number and write it out.  */
	  value_string = dyn_string_new (0);
	  status = demangle_number_literally (dm, value_string, 10, 1);
	  if (STATUS_NO_ERROR (status))
	    status = result_add_string (dm, value_string);
	  /* For long integers, append an l.  */
	  if (code == 'l' && STATUS_NO_ERROR (status))
	    status = result_add_char (dm, code);
	  dyn_string_delete (value_string);

	  RETURN_IF_ERROR (status);
	  return STATUS_OK;
	}
      /* ...else code == ' ', so fall through to represent this
	 literal's type explicitly using cast syntax.  */
    }

  RETURN_IF_ERROR (result_add_char (dm, '('));
  RETURN_IF_ERROR (demangle_type (dm));
  RETURN_IF_ERROR (result_add_char (dm, ')'));

  value_string = dyn_string_new (0);
  if (value_string == NULL)
    return STATUS_ALLOCATION_FAILED;

  status = demangle_number_literally (dm, value_string, 10, 1);
  if (STATUS_NO_ERROR (status))
    status = result_add_string (dm, value_string);
  dyn_string_delete (value_string);
  RETURN_IF_ERROR (status);

  return STATUS_OK;
}

/* Demangles and emits a <template-arg>.  

    <template-arg> ::= <type>                     # type
                   ::= L <type> <value number> E  # literal
                   ::= LZ <encoding> E            # external name
                   ::= X <expression> E           # expression  */

static status_t
demangle_template_arg (dm)
     demangling_t dm;
{
  DEMANGLE_TRACE ("template-arg", dm);

  switch (peek_char (dm))
    {
    case 'L':
      advance_char (dm);

      if (peek_char (dm) == 'Z')
	{
	  /* External name.  */
	  advance_char (dm);
	  /* FIXME: Standard is contradictory here.  */
	  RETURN_IF_ERROR (demangle_encoding (dm));
	}
      else
	RETURN_IF_ERROR (demangle_literal (dm));
      RETURN_IF_ERROR (demangle_char (dm, 'E'));
      break;

    case 'X':
      /* Expression.  */
      advance_char (dm);
      RETURN_IF_ERROR (demangle_expression (dm));
      RETURN_IF_ERROR (demangle_char (dm, 'E'));
      break;

    default:
      RETURN_IF_ERROR (demangle_type (dm));
      break;
    }

  return STATUS_OK;
}

/* Demangles and emits an <expression>.

    <expression> ::= <unary operator-name> <expression>
		 ::= <binary operator-name> <expression> <expression>
		 ::= <expr-primary>  
                 ::= <scope-expression>  */

static status_t
demangle_expression (dm)
     demangling_t dm;
{
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("expression", dm);

  if (peek == 'L' || peek == 'T')
    RETURN_IF_ERROR (demangle_expr_primary (dm));
  else if (peek == 's' && peek_char_next (dm) == 'r')
    RETURN_IF_ERROR (demangle_scope_expression (dm));
  else
    /* An operator expression.  */
    {
      int num_args;
      int type_arg;
      status_t status = STATUS_OK;
      dyn_string_t operator_name;

      /* We have an operator name.  Since we want to output binary
	 operations in infix notation, capture the operator name
	 first.  */
      RETURN_IF_ERROR (result_push (dm));
      RETURN_IF_ERROR (demangle_operator_name (dm, 1, &num_args,
					       &type_arg));
      operator_name = (dyn_string_t) result_pop (dm);

      /* If it's binary, do an operand first.  */
      if (num_args > 1)
	{
	  status = result_add_char (dm, '(');
	  if (STATUS_NO_ERROR (status))
	    status = demangle_expression (dm);
	  if (STATUS_NO_ERROR (status))
	    status = result_add_char (dm, ')');
	}

      /* Emit the operator.  */  
      if (STATUS_NO_ERROR (status))
	status = result_add_string (dm, operator_name);
      dyn_string_delete (operator_name);
      RETURN_IF_ERROR (status);
      
      /* Emit its second (if binary) or only (if unary) operand.  */
      RETURN_IF_ERROR (result_add_char (dm, '('));
      if (type_arg)
	RETURN_IF_ERROR (demangle_type (dm));
      else
	RETURN_IF_ERROR (demangle_expression (dm));
      RETURN_IF_ERROR (result_add_char (dm, ')'));

      /* The ternary operator takes a third operand.  */
      if (num_args == 3)
	{
	  RETURN_IF_ERROR (result_add (dm, ":("));
	  RETURN_IF_ERROR (demangle_expression (dm));
	  RETURN_IF_ERROR (result_add_char (dm, ')'));
	}
    }

  return STATUS_OK;
}

/* Demangles and emits a <scope-expression>.  

    <scope-expression> ::= sr <qualifying type> <source-name>
                       ::= sr <qualifying type> <encoding>  */

static status_t
demangle_scope_expression (dm)
     demangling_t dm;
{
  RETURN_IF_ERROR (demangle_char (dm, 's'));
  RETURN_IF_ERROR (demangle_char (dm, 'r'));
  RETURN_IF_ERROR (demangle_type (dm));
  RETURN_IF_ERROR (result_add (dm, "::"));
  RETURN_IF_ERROR (demangle_encoding (dm));
  return STATUS_OK;
}

/* Demangles and emits an <expr-primary>.  

    <expr-primary> ::= <template-param>
		   ::= L <type> <value number> E  # literal
		   ::= L <mangled-name> E         # external name  */

static status_t
demangle_expr_primary (dm)
     demangling_t dm;
{
  char peek = peek_char (dm);

  DEMANGLE_TRACE ("expr-primary", dm);

  if (peek == 'T')
    RETURN_IF_ERROR (demangle_template_param (dm));
  else if (peek == 'L')
    {
      /* Consume the `L'.  */
      advance_char (dm);
      peek = peek_char (dm);

      if (peek == '_')
	RETURN_IF_ERROR (demangle_mangled_name (dm));
      else
	RETURN_IF_ERROR (demangle_literal (dm));

      RETURN_IF_ERROR (demangle_char (dm, 'E'));
    }
  else
    return STATUS_ERROR;

  return STATUS_OK;
}

/* Demangles and emits a <substitution>.  Sets *TEMPLATE_P to non-zero
   if the substitution is the name of a template, zero otherwise. 

     <substitution> ::= S <seq-id> _
                    ::= S_

                    ::= St   # ::std::
                    ::= Sa   # ::std::allocator
                    ::= Sb   # ::std::basic_string
                    ::= Ss   # ::std::basic_string<char,
				    		   ::std::char_traits<char>,
						   ::std::allocator<char> >
                    ::= Si   # ::std::basic_istream<char,  
                                                    std::char_traits<char> >
                    ::= So   # ::std::basic_ostream<char,  
                                                    std::char_traits<char> >
                    ::= Sd   # ::std::basic_iostream<char, 
                                                    std::char_traits<char> >
*/

static status_t
demangle_substitution (dm, template_p)
     demangling_t dm;
     int *template_p;
{
  int seq_id;
  int peek;
  dyn_string_t text;

  DEMANGLE_TRACE ("substitution", dm);

  RETURN_IF_ERROR (demangle_char (dm, 'S'));

  /* Scan the substitution sequence index.  A missing number denotes
     the first index.  */
  peek = peek_char (dm);
  if (peek == '_')
    seq_id = -1;
  /* If the following character is 0-9 or a capital letter, interpret
     the sequence up to the next underscore as a base-36 substitution
     index.  */
  else if (IS_DIGIT ((unsigned char) peek) 
	   || (peek >= 'A' && peek <= 'Z'))
    RETURN_IF_ERROR (demangle_number (dm, &seq_id, 36, 0));
  else 
    {
      const char *new_last_source_name = NULL;

      switch (peek)
	{
	case 't':
	  RETURN_IF_ERROR (result_add (dm, "std"));
	  break;

	case 'a':
	  RETURN_IF_ERROR (result_add (dm, "std::allocator"));
	  new_last_source_name = "allocator";
	  *template_p = 1;
	  break;

	case 'b':
	  RETURN_IF_ERROR (result_add (dm, "std::basic_string"));
	  new_last_source_name = "basic_string";
	  *template_p = 1;
	  break;
	  
	case 's':
	  if (!flag_verbose)
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::string"));
	      new_last_source_name = "string";
	    }
	  else
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::basic_string<char, std::char_traits<char>, std::allocator<char> >"));
	      new_last_source_name = "basic_string";
	    }
	  *template_p = 0;
	  break;

	case 'i':
	  if (!flag_verbose)
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::istream"));
	      new_last_source_name = "istream";
	    }
	  else
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::basic_istream<char, std::char_traits<char> >"));
	      new_last_source_name = "basic_istream";
	    }
	  *template_p = 0;
	  break;

	case 'o':
	  if (!flag_verbose)
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::ostream"));
	      new_last_source_name = "ostream";
	    }
	  else
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::basic_ostream<char, std::char_traits<char> >"));
	      new_last_source_name = "basic_ostream";
	    }
	  *template_p = 0;
	  break;

	case 'd':
	  if (!flag_verbose) 
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::iostream"));
	      new_last_source_name = "iostream";
	    }
	  else
	    {
	      RETURN_IF_ERROR (result_add (dm, "std::basic_iostream<char, std::char_traits<char> >"));
	      new_last_source_name = "basic_iostream";
	    }
	  *template_p = 0;
	  break;

	default:
	  return "Unrecognized <substitution>.";
	}
      
      /* Consume the character we just processed.  */
      advance_char (dm);

      if (new_last_source_name != NULL)
	{
	  if (!dyn_string_copy_cstr (dm->last_source_name, 
				     new_last_source_name))
	    return STATUS_ALLOCATION_FAILED;
	}

      return STATUS_OK;
    }

  /* Look up the substitution text.  Since `S_' is the most recent
     substitution, `S0_' is the second-most-recent, etc., shift the
     numbering by one.  */
  text = substitution_get (dm, seq_id + 1, template_p);
  if (text == NULL) 
    return "Substitution number out of range.";

  /* Emit the substitution text.  */
  RETURN_IF_ERROR (result_add_string (dm, text));

  RETURN_IF_ERROR (demangle_char (dm, '_'));
  return STATUS_OK;
}

/* Demangles and emits a <local-name>.  

    <local-name> := Z <function encoding> E <entity name> [<discriminator>]
                 := Z <function encoding> E s [<discriminator>]  */

static status_t
demangle_local_name (dm)
     demangling_t dm;
{
  int old_caret_position = result_get_caret (dm);

  DEMANGLE_TRACE ("local-name", dm);

  RETURN_IF_ERROR (demangle_char (dm, 'Z'));
  RETURN_IF_ERROR (demangle_encoding (dm));

  /* Restore the caret to avoid being confused by any qualifiers we
     may have found during the encoding.  */
  result_set_caret (dm, old_caret_position);

  RETURN_IF_ERROR (demangle_char (dm, 'E'));
  RETURN_IF_ERROR (result_add (dm, "::"));

  if (peek_char (dm) == 's')
    {
      /* Local character string literal.  */
      RETURN_IF_ERROR (result_add (dm, "string literal"));
      /* Consume the s.  */
      advance_char (dm);
      RETURN_IF_ERROR (demangle_discriminator (dm, 0));
    }
  else
    {
      int unused;
      /* Local name for some other entity.  Demangle its name.  */
      RETURN_IF_ERROR (demangle_name (dm, &unused));
      RETURN_IF_ERROR (demangle_discriminator (dm, 1));
     }

   return STATUS_OK;
 }

 /* Optimonally demangles and emits a <discriminator>.  If there is no
    <discriminator> at the current position in the mangled string, the
    descriminator is assumed to be zero.  Emit the discriminator number
    in parentheses, unless SUPPRESS_FIRST is non-zero and the
    discriminator is zero.  

     <discriminator> ::= _ <number>  */

static status_t
demangle_discriminator (dm, suppress_first)
     demangling_t dm;
     int suppress_first;
{
  /* Output for <discriminator>s to the demangled name is completely
     suppressed if not in verbose mode.  */

  if (peek_char (dm) == '_')
    {
      /* Consume the underscore.  */
      advance_char (dm);
      if (flag_verbose)
	RETURN_IF_ERROR (result_add (dm, " [#"));
      /* Check if there's a number following the underscore.  */
      if (IS_DIGIT ((unsigned char) peek_char (dm)))
	{
	  int discriminator;
	  /* Demangle the number.  */
	  RETURN_IF_ERROR (demangle_number (dm, &discriminator, 10, 0));
	  if (flag_verbose)
	    /* Write the discriminator.  The mangled number is two
	       less than the discriminator ordinal, counting from
	       zero.  */
	    RETURN_IF_ERROR (int_to_dyn_string (discriminator + 1,
						(dyn_string_t) dm->result));
	}
      else
	return STATUS_ERROR;
      if (flag_verbose)
	RETURN_IF_ERROR (result_add_char (dm, ']'));
    }
  else if (!suppress_first)
    {
      if (flag_verbose)
	RETURN_IF_ERROR (result_add (dm, " [#0]"));
    }

  return STATUS_OK;
}

/* Demangle NAME into RESULT, which must be an initialized
   dyn_string_t.  On success, returns STATUS_OK.  On failure, returns
   an error message, and the contents of RESULT are unchanged.  */

static status_t
cp_demangle (name, result, style)
     const char *name;
     dyn_string_t result;
     int style;
{
  status_t status;
  int length = strlen (name);

  if (length > 2 && name[0] == '_' && name[1] == 'Z')
    {
      demangling_t dm = demangling_new (name, style);
      if (dm == NULL)
	return STATUS_ALLOCATION_FAILED;

      status = result_push (dm);
      if (status != STATUS_OK)
	{
	  demangling_delete (dm);
	  return status;
	}

      status = demangle_mangled_name (dm);
      if (STATUS_NO_ERROR (status))
	{
	  dyn_string_t demangled = (dyn_string_t) result_pop (dm);
	  if (!dyn_string_copy (result, demangled))
	    return STATUS_ALLOCATION_FAILED;
	  dyn_string_delete (demangled);
	}
      
      demangling_delete (dm);
    }
  else
    {
      /* It's evidently not a mangled C++ name.  It could be the name
	 of something with C linkage, though, so just copy NAME into
	 RESULT.  */
      if (!dyn_string_copy_cstr (result, name))
	return STATUS_ALLOCATION_FAILED;
      status = STATUS_OK;
    }

  return status; 
}

/* Demangle TYPE_NAME into RESULT, which must be an initialized
   dyn_string_t.  On success, returns STATUS_OK.  On failiure, returns
   an error message, and the contents of RESULT are unchanged.  */

static status_t
cp_demangle_type (type_name, result)
     const char* type_name;
     dyn_string_t result;
{
  status_t status;
  demangling_t dm = demangling_new (type_name, DMGL_GNU_V3);
  
  if (dm == NULL)
    return STATUS_ALLOCATION_FAILED;

  /* Demangle the type name.  The demangled name is stored in dm.  */
  status = result_push (dm);
  if (status != STATUS_OK)
    {
      demangling_delete (dm);
      return status;
    }

  status = demangle_type (dm);

  if (STATUS_NO_ERROR (status))
    {
      /* The demangling succeeded.  Pop the result out of dm and copy
	 it into RESULT.  */
      dyn_string_t demangled = (dyn_string_t) result_pop (dm);
      if (!dyn_string_copy (result, demangled))
	return STATUS_ALLOCATION_FAILED;
      dyn_string_delete (demangled);
    }

  /* Clean up.  */
  demangling_delete (dm);

  return status;
}

#if defined(IN_LIBGCC2) || defined(IN_GLIBCPP_V3)
extern char *__cxa_demangle PARAMS ((const char *, char *, size_t *, int *));

/* ia64 ABI-mandated entry point in the C++ runtime library for performing
   demangling.  MANGLED_NAME is a NUL-terminated character string
   containing the name to be demangled.  

   OUTPUT_BUFFER is a region of memory, allocated with malloc, of
   *LENGTH bytes, into which the demangled name is stored.  If
   OUTPUT_BUFFER is not long enough, it is expanded using realloc.
   OUTPUT_BUFFER may instead be NULL; in that case, the demangled name
   is placed in a region of memory allocated with malloc.  

   If LENGTH is non-NULL, the length of the buffer conaining the
   demangled name, is placed in *LENGTH.  

   The return value is a pointer to the start of the NUL-terminated
   demangled name, or NULL if the demangling fails.  The caller is
   responsible for deallocating this memory using free.  

   *STATUS is set to one of the following values:
      0: The demangling operation succeeded.
     -1: A memory allocation failiure occurred.
     -2: MANGLED_NAME is not a valid name under the C++ ABI mangling rules.
     -3: One of the arguments is invalid.

   The demagling is performed using the C++ ABI mangling rules, with
   GNU extensions.  */

char *
__cxa_demangle (mangled_name, output_buffer, length, status)
     const char *mangled_name;
     char *output_buffer;
     size_t *length;
     int *status;
{
  struct dyn_string demangled_name;
  status_t result;

  if (status == NULL)
    return NULL;

  if (mangled_name == NULL) {
    *status = -3;
    return NULL;
  }

  /* Did the caller provide a buffer for the demangled name?  */
  if (output_buffer == NULL) {
    /* No; dyn_string will malloc a buffer for us.  */
    if (!dyn_string_init (&demangled_name, 0)) 
      {
	*status = -1;
	return NULL;
      }
  }
  else {
    /* Yes.  Check that the length was provided.  */
    if (length == NULL) {
      *status = -3;
      return NULL;
    }
    /* Install the buffer into a dyn_string.  */
    demangled_name.allocated = *length;
    demangled_name.length = 0;
    demangled_name.s = output_buffer;
  }

  if (mangled_name[0] == '_' && mangled_name[1] == 'Z')
    /* MANGLED_NAME apprears to be a function or variable name.
       Demangle it accordingly.  */
    result = cp_demangle (mangled_name, &demangled_name, 0);
  else
    /* Try to demangled MANGLED_NAME as the name of a type.  */
    result = cp_demangle_type (mangled_name, &demangled_name);

  if (result == STATUS_OK) 
    /* The demangling succeeded.  */
    {
      /* If LENGTH isn't NULL, store the allocated buffer length
	 there; the buffer may have been realloced by dyn_string
	 functions.  */
      if (length != NULL)
	*length = demangled_name.allocated;
      /* The operation was a success.  */
      *status = 0;
      return dyn_string_buf (&demangled_name);
    }
  else if (result == STATUS_ALLOCATION_FAILED)
    /* A call to malloc or realloc failed during the demangling
       operation.  */
    {
      *status = -1;
      return NULL;
    }
  else
    /* The demangling failed for another reason, most probably because
       MANGLED_NAME isn't a valid mangled name.  */
    {
      /* If the buffer containing the demangled name wasn't provided
	 by the caller, free it.  */
      if (output_buffer == NULL)
	free (dyn_string_buf (&demangled_name));
      *status = -2;
      return NULL;
    }
}

#else /* ! (IN_LIBGCC2 || IN_GLIBCPP_V3) */

/* Variant entry point for integration with the existing cplus-dem
   demangler.  Attempts to demangle MANGLED.  If the demangling
   succeeds, returns a buffer, allocated with malloc, containing the
   demangled name.  The caller must deallocate the buffer using free.
   If the demangling failes, returns NULL.  */

char *
cplus_demangle_v3 (mangled, options)
     const char* mangled;
     int options;
{
  dyn_string_t demangled;
  status_t status;
  int type = !!(options & DMGL_TYPES);

  if (mangled[0] == '_' && mangled[1] == 'Z')
    /* It is not a type.  */
    type = 0;
  else
    {
      /* It is a type. Stop if we don't want to demangle types. */
      if (!type)
	return NULL;
    }

  flag_verbose = !!(options & DMGL_VERBOSE);

  /* Create a dyn_string to hold the demangled name.  */
  demangled = dyn_string_new (0);
  /* Attempt the demangling.  */
  if (!type)
    /* Appears to be a function or variable name.  */
    status = cp_demangle (mangled, demangled, 0);
  else
    /* Try to demangle it as the name of a type.  */
    status = cp_demangle_type (mangled, demangled);

  if (STATUS_NO_ERROR (status))
    /* Demangling succeeded.  */
    {
      /* Grab the demangled result from the dyn_string.  It was
	 allocated with malloc, so we can return it directly.  */
      char *return_value = dyn_string_release (demangled);
      /* Hand back the demangled name.  */
      return return_value;
    }
  else if (status == STATUS_ALLOCATION_FAILED)
    {
      fprintf (stderr, "Memory allocation failed.\n");
      abort ();
    }
  else
    /* Demangling failed.  */
    {
      dyn_string_delete (demangled);
      return NULL;
    }
}

/* Demangle a Java symbol.  Java uses a subset of the V3 ABI C++ mangling 
   conventions, but the output formatting is a little different.
   This instructs the C++ demangler not to emit pointer characters ("*"), and 
   to use Java's namespace separator symbol ("." instead of "::").  It then 
   does an additional pass over the demangled output to replace instances 
   of JArray<TYPE> with TYPE[].  */

char *
java_demangle_v3 (mangled)
     const char* mangled;
{
  dyn_string_t demangled;
  char *next;
  char *end;
  int len;
  status_t status;
  int nesting = 0;
  char *cplus_demangled;
  char *return_value;
    
  /* Create a dyn_string to hold the demangled name.  */
  demangled = dyn_string_new (0);

  /* Attempt the demangling.  */
  status = cp_demangle ((char *) mangled, demangled, DMGL_JAVA);

  if (STATUS_NO_ERROR (status))
    /* Demangling succeeded.  */
    {
      /* Grab the demangled result from the dyn_string. */
      cplus_demangled = dyn_string_release (demangled);
    }
  else if (status == STATUS_ALLOCATION_FAILED)
    {
      fprintf (stderr, "Memory allocation failed.\n");
      abort ();
    }
  else
    /* Demangling failed.  */
    {
      dyn_string_delete (demangled);
      return NULL;
    }
  
  len = strlen (cplus_demangled);
  next = cplus_demangled;
  end = next + len;
  demangled = NULL;

  /* Replace occurances of JArray<TYPE> with TYPE[]. */
  while (next < end)
    {
      char *open_str = strstr (next, "JArray<");
      char *close_str = NULL;
      if (nesting > 0)
	close_str = strchr (next, '>');
    
      if (open_str != NULL && (close_str == NULL || close_str > open_str))
        {
	  ++nesting;
	  
	  if (!demangled)
	    demangled = dyn_string_new(len);

          /* Copy prepending symbols, if any. */
	  if (open_str > next)
	    {
	      open_str[0] = 0;
	      dyn_string_append_cstr (demangled, next);
	    }	  
	  next = open_str + 7;
	}
      else if (close_str != NULL)
        {
	  --nesting;
	  
          /* Copy prepending type symbol, if any. Squash any spurious 
	     whitespace. */
	  if (close_str > next && next[0] != ' ')
	    {
	      close_str[0] = 0;
	      dyn_string_append_cstr (demangled, next);
	    }
	  dyn_string_append_cstr (demangled, "[]");	  
	  next = close_str + 1;
	}
      else
        {
	  /* There are no more arrays. Copy the rest of the symbol, or
	     simply return the original symbol if no changes were made. */
	  if (next == cplus_demangled)
	    return cplus_demangled;

          dyn_string_append_cstr (demangled, next);
	  next = end;
	}
    }

  free (cplus_demangled);
  
  if (demangled)
    return_value = dyn_string_release (demangled);
  else
    return_value = NULL;

  return return_value;
}

#endif /* IN_LIBGCC2 || IN_GLIBCPP_V3 */


#ifndef IN_GLIBCPP_V3
/* Demangle NAME in the G++ V3 ABI demangling style, and return either
   zero, indicating that some error occurred, or a demangling_t
   holding the results.  */
static demangling_t
demangle_v3_with_details (name)
     const char *name;
{
  demangling_t dm;
  status_t status;

  if (strncmp (name, "_Z", 2))
    return 0;

  dm = demangling_new (name, DMGL_GNU_V3);
  if (dm == NULL)
    {
      fprintf (stderr, "Memory allocation failed.\n");
      abort ();
    }

  status = result_push (dm);
  if (! STATUS_NO_ERROR (status))
    {
      demangling_delete (dm);
      fprintf (stderr, "%s\n", status);
      abort ();
    }

  status = demangle_mangled_name (dm);
  if (STATUS_NO_ERROR (status))
    return dm;

  demangling_delete (dm);
  return 0;
}


/* Return non-zero iff NAME is the mangled form of a constructor name
   in the G++ V3 ABI demangling style.  Specifically, return:
   - '1' if NAME is a complete object constructor,
   - '2' if NAME is a base object constructor, or
   - '3' if NAME is a complete object allocating constructor.  */
enum gnu_v3_ctor_kinds
is_gnu_v3_mangled_ctor (name)
     const char *name;
{
  demangling_t dm = demangle_v3_with_details (name);

  if (dm)
    {
      enum gnu_v3_ctor_kinds result = dm->is_constructor;
      demangling_delete (dm);
      return result;
    }
  else
    return (enum gnu_v3_ctor_kinds) 0;
}


/* Return non-zero iff NAME is the mangled form of a destructor name
   in the G++ V3 ABI demangling style.  Specifically, return:
   - '0' if NAME is a deleting destructor,
   - '1' if NAME is a complete object destructor, or
   - '2' if NAME is a base object destructor.  */
enum gnu_v3_dtor_kinds
is_gnu_v3_mangled_dtor (name)
     const char *name;
{
  demangling_t dm = demangle_v3_with_details (name);

  if (dm)
    {
      enum gnu_v3_dtor_kinds result = dm->is_destructor;
      demangling_delete (dm);
      return result;
    }
  else
    return (enum gnu_v3_dtor_kinds) 0;
}
#endif /* IN_GLIBCPP_V3 */


#ifdef STANDALONE_DEMANGLER

#include "getopt.h"

static void print_usage
  PARAMS ((FILE* fp, int exit_value));

/* Non-zero if CHAR is a character than can occur in a mangled name.  */
#define is_mangled_char(CHAR)                                           \
  (IS_ALPHA (CHAR) || IS_DIGIT (CHAR)                                   \
   || (CHAR) == '_' || (CHAR) == '.' || (CHAR) == '$')

/* The name of this program, as invoked.  */
const char* program_name;

/* Prints usage summary to FP and then exits with EXIT_VALUE.  */

static void
print_usage (fp, exit_value)
     FILE* fp;
     int exit_value;
{
  fprintf (fp, "Usage: %s [options] [names ...]\n", program_name);
  fprintf (fp, "Options:\n");
  fprintf (fp, "  -h,--help       Display this message.\n");
  fprintf (fp, "  -s,--strict     Demangle standard names only.\n");
  fprintf (fp, "  -v,--verbose    Produce verbose demanglings.\n");
  fprintf (fp, "If names are provided, they are demangled.  Otherwise filters standard input.\n");

  exit (exit_value);
}

/* Option specification for getopt_long.  */
static const struct option long_options[] = 
{
  { "help",    no_argument, NULL, 'h' },
  { "strict",  no_argument, NULL, 's' },
  { "verbose", no_argument, NULL, 'v' },
  { NULL,      no_argument, NULL, 0   },
};

/* Main entry for a demangling filter executable.  It will demangle
   its command line arguments, if any.  If none are provided, it will
   filter stdin to stdout, replacing any recognized mangled C++ names
   with their demangled equivalents.  */

int
main (argc, argv)
     int argc;
     char *argv[];
{
  status_t status;
  int i;
  int opt_char;

  /* Use the program name of this program, as invoked.  */
  program_name = argv[0];

  /* Parse options.  */
  do 
    {
      opt_char = getopt_long (argc, argv, "hsv", long_options, NULL);
      switch (opt_char)
	{
	case '?':  /* Unrecognized option.  */
	  print_usage (stderr, 1);
	  break;

	case 'h':
	  print_usage (stdout, 0);
	  break;

	case 's':
	  flag_strict = 1;
	  break;

	case 'v':
	  flag_verbose = 1;
	  break;
	}
    }
  while (opt_char != -1);

  if (optind == argc) 
    /* No command line arguments were provided.  Filter stdin.  */
    {
      dyn_string_t mangled = dyn_string_new (3);
      dyn_string_t demangled = dyn_string_new (0);
      status_t status;

      /* Read all of input.  */
      while (!feof (stdin))
	{
	  char c = getchar ();

	  /* The first character of a mangled name is an underscore.  */
	  if (feof (stdin))
	    break;
	  if (c != '_')
	    {
	      /* It's not a mangled name.  Print the character and go
		 on.  */
	      putchar (c);
	      continue;
	    }
	  c = getchar ();
	  
	  /* The second character of a mangled name is a capital `Z'.  */
	  if (feof (stdin))
	    break;
	  if (c != 'Z')
	    {
	      /* It's not a mangled name.  Print the previous
		 underscore, the `Z', and go on.  */
	      putchar ('_');
	      putchar (c);
	      continue;
	    }

	  /* Start keeping track of the candidate mangled name.  */
	  dyn_string_append_char (mangled, '_');
	  dyn_string_append_char (mangled, 'Z');

	  /* Pile characters into mangled until we hit one that can't
	     occur in a mangled name.  */
	  c = getchar ();
	  while (!feof (stdin) && is_mangled_char (c))
	    {
	      dyn_string_append_char (mangled, c);
	      if (feof (stdin))
		break;
	      c = getchar ();
	    }

	  /* Attempt to demangle the name.  */
	  status = cp_demangle (dyn_string_buf (mangled), demangled, 0);

	  /* If the demangling succeeded, great!  Print out the
	     demangled version.  */
	  if (STATUS_NO_ERROR (status))
	    fputs (dyn_string_buf (demangled), stdout);
	  /* Abort on allocation failures.  */
	  else if (status == STATUS_ALLOCATION_FAILED)
	    {
	      fprintf (stderr, "Memory allocation failed.\n");
	      abort ();
	    }
	  /* Otherwise, it might not have been a mangled name.  Just
	     print out the original text.  */
	  else
	    fputs (dyn_string_buf (mangled), stdout);

	  /* If we haven't hit EOF yet, we've read one character that
	     can't occur in a mangled name, so print it out.  */
	  if (!feof (stdin))
	    putchar (c);

	  /* Clear the candidate mangled name, to start afresh next
	     time we hit a `_Z'.  */
	  dyn_string_clear (mangled);
	}

      dyn_string_delete (mangled);
      dyn_string_delete (demangled);
    }
  else
    /* Demangle command line arguments.  */
    {
      dyn_string_t result = dyn_string_new (0);

      /* Loop over command line arguments.  */
      for (i = optind; i < argc; ++i)
	{
	  /* Attempt to demangle.  */
	  status = cp_demangle (argv[i], result, 0);

	  /* If it worked, print the demangled name.  */
	  if (STATUS_NO_ERROR (status))
	    printf ("%s\n", dyn_string_buf (result));
	  /* Abort on allocaiton failures.  */
	  else if (status == STATUS_ALLOCATION_FAILED)
	    {
	      fprintf (stderr, "Memory allocation failed.\n");
	      abort ();
	    }
	  /* If not, print the error message to stderr instead.  */
	  else 
	    fprintf (stderr, "%s\n", status);
	}
      dyn_string_delete (result);
    }

  return 0;
}

#endif /* STANDALONE_DEMANGLER */