aboutsummaryrefslogtreecommitdiff
path: root/gcc/m2/mc/mcPretty.mod
blob: ca0f0bacd87b2bd04c09d5759019c45e740807f1 (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
(* Copyright (C) 2015-2025 Free Software Foundation, Inc.  *)
(* This file is part of GNU Modula-2.

GNU Modula-2 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 3, or (at your option) any later
version.

GNU Modula-2 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

IMPLEMENTATION MODULE mcPretty ;

FROM DynamicStrings IMPORT String, InitString, KillString, Length, char ;
FROM Storage IMPORT ALLOCATE, DEALLOCATE ;


TYPE
   pretty = POINTER TO RECORD
                          write      : writeProc ;
			  writeln    : writeLnProc ;
                          needsSpace,
                          needsIndent: BOOLEAN ;
			  seekPos,
			  curLine,
                          curPos,
		          indent     : CARDINAL ;
			  stacked    : pretty ;
                       END ;


(*
   initPretty - initialise a pretty print data structure.
*)

PROCEDURE initPretty (w: writeProc; l: writeLnProc) : pretty ;
VAR
   p: pretty ;
BEGIN
   NEW (p) ;
   WITH p^ DO
      write := w ;
      writeln := l ;
      needsSpace := FALSE ;
      needsIndent := FALSE ;
      curPos := 0 ;
      curLine := 0 ;
      seekPos := 0 ;
      indent := 0 ;
      stacked := NIL
   END ;
   RETURN p
END initPretty ;


(*
   dupPretty - duplicate a pretty print data structure.
*)

PROCEDURE dupPretty (p: pretty) : pretty ;
VAR
   q: pretty ;
BEGIN
   NEW (q) ;
   q^ := p^ ;
   RETURN q
END dupPretty ;


(*
   killPretty - destroy a pretty print data structure.
                Post condition:  p is assigned to NIL.
*)

PROCEDURE killPretty (VAR p: pretty) ;
BEGIN
   p := NIL ;
   RETURN ;
   DISPOSE (p) ;
   p := NIL
END killPretty ;


(*
   pushPretty - duplicate, p.  Push, p, and return the duplicate.
*)

PROCEDURE pushPretty (p: pretty) : pretty ;
VAR
   q: pretty ;
BEGIN
   q := dupPretty (p) ;
   q^.stacked := p ;
   RETURN q
END pushPretty ;


(*
   popPretty - pops the pretty object from the stack.
*)

PROCEDURE popPretty (p: pretty) : pretty ;
VAR
   q: pretty ;
BEGIN
   q := p^.stacked ;
   q^.needsIndent := p^.needsIndent ;
   q^.needsSpace := p^.needsSpace ;
   q^.curPos := p^.curPos ;
   q^.seekPos := p^.seekPos ;
   q^.curLine := p^.curLine ;
   killPretty (p) ;
   RETURN q
END popPretty ;


(*
   getindent - returns the current indent value.
*)

PROCEDURE getindent (p: pretty) : CARDINAL ;
BEGIN
   RETURN p^.indent
END getindent ;


(*
   setindent - sets the current indent to, n.
*)

PROCEDURE setindent (p: pretty; n: CARDINAL) ;
BEGIN
   p^.indent := n
END setindent ;


(*
   getcurpos - returns the current cursor position.
*)

PROCEDURE getcurpos (s: pretty) : CARDINAL ;
BEGIN
   IF s^.needsSpace
   THEN
      RETURN s^.curPos+1
   ELSE
      RETURN s^.curPos
   END
END getcurpos ;


(*
   getcurline - returns the current line number.
*)

PROCEDURE getcurline (s: pretty) : CARDINAL ;
BEGIN
   RETURN s^.curLine
END getcurline ;


(*
   getseekpos - returns the seek position.
*)

PROCEDURE getseekpos (s: pretty) : CARDINAL ;
BEGIN
   RETURN s^.seekPos
END getseekpos ;


(*
   setneedSpace - sets needSpace flag to TRUE.
*)

PROCEDURE setNeedSpace (s: pretty) ;
BEGIN
   s^.needsSpace := TRUE
END setNeedSpace ;


(*
   noSpace - unset needsSpace.
*)

PROCEDURE noSpace (s: pretty) ;
BEGIN
   s^.needsSpace := FALSE
END noSpace ;


(*
   flushSpace -
*)

PROCEDURE flushSpace (p: pretty) ;
BEGIN
   IF p^.needsSpace
   THEN
      p^.write (' ') ;
      p^.needsSpace := FALSE ;
      INC (p^.curPos) ;
      INC (p^.seekPos)
   END
END flushSpace ;


(*
   flushIndent -
*)

PROCEDURE flushIndent (p: pretty) ;
VAR
   i: CARDINAL ;
BEGIN
   flushSpace (p) ;
   IF p^.needsIndent
   THEN
      WHILE p^.curPos<p^.indent DO
         p^.write (' ') ;
         INC (p^.curPos) ;
         INC (p^.seekPos)
      END ;
      p^.needsIndent := FALSE
   END
END flushIndent ;


(*
   print - print a string using, p.
*)

PROCEDURE print (p: pretty; a: ARRAY OF CHAR) ;
VAR
   s: String ;
BEGIN
   s := InitString (a) ;
   prints (p, s) ;
   s := KillString (s)
END print ;


(*
   prints - print a string using, p.
*)

PROCEDURE prints (p: pretty; s: String) ;
VAR
   l, i: CARDINAL ;
BEGIN
   l := Length (s) ;
   i := 0 ;
   flushSpace (p) ;
   WHILE i<l DO
      IF (i+2<=l) AND (char (s, i)='\') AND (char (s, i+1)='n')
      THEN
         p^.needsIndent := TRUE ;
         p^.needsSpace := FALSE ;
         p^.curPos := 0 ;
         p^.writeln ;
         INC (p^.seekPos) ;
         INC (p^.curLine) ;
         INC (i)
      ELSE
         flushIndent (p) ;
         p^.write (char (s, i)) ;
         INC (p^.curPos) ;
         INC (p^.seekPos)
      END ;
      INC (i)
   END
END prints ;


(*
   raw - print out string, s, without any translation of
         escape sequences.
*)

PROCEDURE raw (p: pretty; s: String) ;
VAR
   l, i: CARDINAL ;
BEGIN
   l := Length (s) ;
   i := 0 ;
   flushSpace (p) ;
   flushIndent (p) ;
   WHILE i < l DO
      p^.write (char (s, i)) ;
      INC (p^.curPos) ;
      INC (p^.seekPos) ;
      INC (i)
   END
END raw ;


END mcPretty.