diff options
Diffstat (limited to 'src/utilfuns/zlib/inffast.c')
| -rw-r--r-- | src/utilfuns/zlib/inffast.c | 196 |
1 files changed, 98 insertions, 98 deletions
diff --git a/src/utilfuns/zlib/inffast.c b/src/utilfuns/zlib/inffast.c index aa7f1d4..a7ebc64 100644 --- a/src/utilfuns/zlib/inffast.c +++ b/src/utilfuns/zlib/inffast.c @@ -44,7 +44,7 @@ z_streamp z; uInt md; /* mask for distance tree */ uInt c; /* bytes to copy */ uInt d; /* distance back to copy from */ - Bytef *r; /* copy source pointer */ + unsigned long csp; /* copy source pointer */ /* load input, output, bit values */ LOAD @@ -59,107 +59,107 @@ z_streamp z; GRABBITS(20) /* max bits for literal/length code */ if ((e = (t = tl + ((uInt)b & ml))->exop) == 0) { - DUMPBITS(t->bits) - Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ? - "inflate: * literal '%c'\n" : - "inflate: * literal 0x%02x\n", t->base)); - *q++ = (Byte)t->base; - m--; - continue; + DUMPBITS(t->bits) + Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ? + "inflate: * literal '%c'\n" : + "inflate: * literal 0x%02x\n", t->base)); + *q++ = (Byte)t->base; + m--; + continue; } do { - DUMPBITS(t->bits) - if (e & 16) - { - /* get extra bits for length */ - e &= 15; - c = t->base + ((uInt)b & inflate_mask[e]); - DUMPBITS(e) - Tracevv((stderr, "inflate: * length %u\n", c)); + DUMPBITS(t->bits) + if (e & 16) + { + /* get extra bits for length */ + e &= 15; + c = t->base + ((uInt)b & inflate_mask[e]); + DUMPBITS(e) + Tracevv((stderr, "inflate: * length %u\n", c)); - /* decode distance base of block to copy */ - GRABBITS(15); /* max bits for distance code */ - e = (t = td + ((uInt)b & md))->exop; - do { - DUMPBITS(t->bits) - if (e & 16) - { - /* get extra bits to add to distance base */ - e &= 15; - GRABBITS(e) /* get extra bits (up to 13) */ - d = t->base + ((uInt)b & inflate_mask[e]); - DUMPBITS(e) - Tracevv((stderr, "inflate: * distance %u\n", d)); + /* decode distance base of block to copy */ + GRABBITS(15); /* max bits for distance code */ + e = (t = td + ((uInt)b & md))->exop; + do { + DUMPBITS(t->bits) + if (e & 16) + { + /* get extra bits to add to distance base */ + e &= 15; + GRABBITS(e) /* get extra bits (up to 13) */ + d = t->base + ((uInt)b & inflate_mask[e]); + DUMPBITS(e) + Tracevv((stderr, "inflate: * distance %u\n", d)); - /* do the copy */ - m -= c; - r = q - d; - if (r < s->window) /* wrap if needed */ - { - do { - r += s->end - s->window; /* force pointer in window */ - } while (r < s->window); /* covers invalid distances */ - e = s->end - r; - if (c > e) - { - c -= e; /* wrapped copy */ - do { - *q++ = *r++; - } while (--e); - r = s->window; - do { - *q++ = *r++; - } while (--c); - } - else /* normal copy */ - { - *q++ = *r++; c--; - *q++ = *r++; c--; - do { - *q++ = *r++; - } while (--c); - } - } - else /* normal copy */ - { - *q++ = *r++; c--; - *q++ = *r++; c--; - do { - *q++ = *r++; - } while (--c); - } - break; - } - else if ((e & 64) == 0) - { - t += t->base; - e = (t += ((uInt)b & inflate_mask[e]))->exop; - } - else - { - z->msg = (char*)"invalid distance code"; - UNGRAB - UPDATE - return Z_DATA_ERROR; - } - } while (1); - break; - } - if ((e & 64) == 0) - { - t += t->base; - if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0) - { - DUMPBITS(t->bits) - Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ? - "inflate: * literal '%c'\n" : - "inflate: * literal 0x%02x\n", t->base)); - *q++ = (Byte)t->base; - m--; - break; - } - } - else if (e & 32) + /* do the copy */ + m -= c; + csp = (unsigned long)q - d; + if (csp < (unsigned long)s->window) /* wrap if needed */ + { + do { + csp += (unsigned long)(s->end - s->window); /* force pointer in window */ + } while (csp < (unsigned long)s->window); /* covers invalid distances */ + e = (unsigned long)s->end - csp; + if (c > e) + { + c -= e; /* wrapped copy */ + do { + *q++ = *(Bytef *)csp++; + } while (--e); + csp = s->window; + do { + *q++ = *(Bytef *)csp++; + } while (--c); + } + else /* normal copy */ + { + *q++ = *(Bytef *)csp++; c--; + *q++ = *(Bytef *)csp++; c--; + do { + *q++ = *(Bytef *)csp++; + } while (--c); + } + } + else /* normal copy */ + { + *q++ = *(Bytef *)csp++; c--; + *q++ = *(Bytef *)csp++; c--; + do { + *q++ = *(Bytef *)csp++; + } while (--c); + } + break; + } + else if ((e & 64) == 0) + { + t += t->base; + e = (t += ((uInt)b & inflate_mask[e]))->exop; + } + else + { + z->msg = (char*)"invalid distance code"; + UNGRAB + UPDATE + return Z_DATA_ERROR; + } + } while (1); + break; + } + if ((e & 64) == 0) + { + t += t->base; + if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0) + { + DUMPBITS(t->bits) + Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ? + "inflate: * literal '%c'\n" : + "inflate: * literal 0x%02x\n", t->base)); + *q++ = (Byte)t->base; + m--; + break; + } + } + else if (e & 32) { Tracevv((stderr, "inflate: * end of block\n")); UNGRAB |