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
|
/* { dg-additional-options "-O3 -Wno-analyzer-too-complex" } */
/* TODO: reduce this; was triggering this assert:
gcc_assert (pruned_state != existing_state);
*/
typedef unsigned char Byte;
typedef unsigned int uInt;
typedef void *voidp;
typedef voidp (*alloc_func)(voidp opaque, uInt items, uInt size);
typedef struct z_stream_s {
alloc_func zalloc;
voidp opaque;
} z_stream;
typedef z_stream *z_streamp;
typedef struct inflate_huft_s inflate_huft;
struct inflate_huft_s {
struct {
Byte Exop;
Byte Bits;
} what;
uInt base;
};
static int huft_build(uInt *, uInt, uInt, const uInt *, const uInt *,
inflate_huft **, uInt *, inflate_huft *, uInt *, uInt *);
static int huft_build(uInt *b, uInt n, uInt s, const uInt *d, const uInt *e,
inflate_huft **t, uInt *m, inflate_huft *hp, uInt *hn,
uInt *v) {
uInt a;
uInt c[15 + 1];
uInt f;
int g;
int h;
register uInt i;
register uInt j;
register int k;
int l;
uInt mask;
register uInt *p;
inflate_huft *q;
struct inflate_huft_s r; /* { dg-message "region created on stack here" } */
inflate_huft *u[15];
register int w;
uInt x[15 + 1];
uInt *xp;
int y;
uInt z;
p = c;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
p = b;
i = n;
do {
c[*p++]++;
} while (--i);
if (c[0] == n) {
*t = (inflate_huft *)0;
*m = 0;
return 0;
}
l = *m;
for (j = 1; j <= 15; j++)
if (c[j])
break;
k = j;
if ((uInt)l < j)
l = j;
for (i = 15; i; i--)
if (c[i])
break;
g = i;
if ((uInt)l > i)
l = i;
*m = l;
for (y = 1 << j; j < i; j++, y <<= 1)
if ((y -= c[j]) < 0)
return (-3);
if ((y -= c[i]) < 0)
return (-3);
c[i] += y;
x[1] = j = 0;
p = c + 1;
xp = x + 2;
while (--i) {
*xp++ = (j += *p++);
}
p = b;
i = 0;
do {
if ((j = *p++) != 0)
v[x[j]++] = i;
} while (++i < n);
n = x[g];
x[0] = i = 0;
p = v;
h = -1;
w = -l;
u[0] = (inflate_huft *)0;
q = (inflate_huft *)0;
z = 0;
for (; k <= g; k++) {
a = c[k];
while (a--) {
while (k > w + l) {
h++;
w += l;
z = g - w;
z = z > (uInt)l ? l : z;
if ((f = 1 << (j = k - w)) > a + 1) {
f -= a + 1;
xp = c + k;
if (j < z)
while (++j < z) {
if ((f <<= 1) <= *++xp)
break;
f -= *xp;
}
}
z = 1 << j;
if (*hn + z > 1440)
return (-4);
u[h] = q = hp + *hn;
*hn += z;
if (h) {
x[h] = i;
r.what.Bits = (Byte)l;
r.what.Exop = (Byte)j;
j = i >> (w - l);
r.base = (uInt)(q - u[h - 1] - j);
u[h - 1][j] = r;
} else
*t = q;
}
r.what.Bits = (Byte)(k - w);
if (p >= v + n)
r.what.Exop = 128 + 64;
else if (*p < s) {
r.what.Exop = (Byte)(*p < 256 ? 0 : 32 + 64);
r.base = *p++;
} else {
r.what.Exop = (Byte)(e[*p - s] + 16 + 64);
r.base = d[*p++ - s];
}
f = 1 << (k - w);
for (j = i >> w; j < z; j += f)
q[j] = r; /* { dg-warning "use of uninitialized value 'r.base'" } */
mask = (1 << w) - 1;
/* The analyzer thinks that h can be -1 here.
This is probably a false positive. */
while ((i & mask) != x[h]) { /* { dg-bogus "under-read" "" { xfail *-*-* } } */
h--;
w -= l;
mask = (1 << w) - 1;
}
}
}
return y != 0 && g != 1 ? (-5) : 0;
}
extern const uInt cplens[31];
extern const uInt cplext[31];
extern const uInt cpdist[30];
extern const uInt cpdext[30];
int inflate_trees_dynamic(uInt nl, uInt nd, uInt *c, uInt *bl, uInt *bd,
inflate_huft **tl, inflate_huft **td,
inflate_huft *hp, z_streamp z) {
int r;
uInt hn = 0;
uInt *v;
if ((v = (uInt *)(*((z)->zalloc))((z)->opaque, (288), (sizeof(uInt)))) == 0)
return (-4);
r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
return 0;
}
|
