diff options
Diffstat (limited to 'src/zlib/zutil.c')
| -rw-r--r-- | src/zlib/zutil.c | 638 |
1 files changed, 319 insertions, 319 deletions
diff --git a/src/zlib/zutil.c b/src/zlib/zutil.c index a94cdb80c..0ef4f99f5 100644 --- a/src/zlib/zutil.c +++ b/src/zlib/zutil.c @@ -1,319 +1,319 @@ -/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#include "zutil.h"
-
-#ifndef NO_DUMMY_DECL
-struct internal_state {int dummy;}; /* for buggy compilers */
-#endif
-
-#ifndef STDC
-extern void exit OF((int));
-#endif
-
-const char * const z_errmsg[10] = {
-"need dictionary", /* Z_NEED_DICT 2 */
-"stream end", /* Z_STREAM_END 1 */
-"", /* Z_OK 0 */
-"file error", /* Z_ERRNO (-1) */
-"stream error", /* Z_STREAM_ERROR (-2) */
-"data error", /* Z_DATA_ERROR (-3) */
-"insufficient memory", /* Z_MEM_ERROR (-4) */
-"buffer error", /* Z_BUF_ERROR (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
-""};
-
-
-const char * ZEXPORT zlibVersion()
-{
- return ZLIB_VERSION;
-}
-
-uLong ZEXPORT zlibCompileFlags()
-{
- uLong flags;
-
- flags = 0;
- switch (sizeof(uInt)) {
- case 2: break;
- case 4: flags += 1; break;
- case 8: flags += 2; break;
- default: flags += 3;
- }
- switch (sizeof(uLong)) {
- case 2: break;
- case 4: flags += 1 << 2; break;
- case 8: flags += 2 << 2; break;
- default: flags += 3 << 2;
- }
- switch (sizeof(voidpf)) {
- case 2: break;
- case 4: flags += 1 << 4; break;
- case 8: flags += 2 << 4; break;
- default: flags += 3 << 4;
- }
- switch (sizeof(z_off_t)) {
- case 2: break;
- case 4: flags += 1 << 6; break;
- case 8: flags += 2 << 6; break;
- default: flags += 3 << 6;
- }
-#ifdef DEBUG
- flags += 1 << 8;
-#endif
-#if defined(ASMV) || defined(ASMINF)
- flags += 1 << 9;
-#endif
-#ifdef ZLIB_WINAPI
- flags += 1 << 10;
-#endif
-#ifdef BUILDFIXED
- flags += 1 << 12;
-#endif
-#ifdef DYNAMIC_CRC_TABLE
- flags += 1 << 13;
-#endif
-#ifdef NO_GZCOMPRESS
- flags += 1 << 16;
-#endif
-#ifdef NO_GZIP
- flags += 1 << 17;
-#endif
-#ifdef PKZIP_BUG_WORKAROUND
- flags += 1 << 20;
-#endif
-#ifdef FASTEST
- flags += 1 << 21;
-#endif
-#ifdef STDC
-# ifdef NO_vsnprintf
- flags += 1 << 25;
-# ifdef HAS_vsprintf_void
- flags += 1 << 26;
-# endif
-# else
-# ifdef HAS_vsnprintf_void
- flags += 1 << 26;
-# endif
-# endif
-#else
- flags += 1 << 24;
-# ifdef NO_snprintf
- flags += 1 << 25;
-# ifdef HAS_sprintf_void
- flags += 1 << 26;
-# endif
-# else
-# ifdef HAS_snprintf_void
- flags += 1 << 26;
-# endif
-# endif
-#endif
- return flags;
-}
-
-#ifdef DEBUG
-
-# ifndef verbose
-# define verbose 0
-# endif
-int z_verbose = verbose;
-
-void z_error (m)
- char *m;
-{
- fprintf(stderr, "%s\n", m);
- exit(1);
-}
-#endif
-
-/* exported to allow conversion of error code to string for compress() and
- * uncompress()
- */
-const char * ZEXPORT zError(err)
- int err;
-{
- return ERR_MSG(err);
-}
-
-#if defined(_WIN32_WCE)
- /* does not exist on WCE */
- int errno = 0;
-#endif
-
-#ifndef HAVE_MEMCPY
-
-void zmemcpy(dest, source, len)
- Bytef* dest;
- const Bytef* source;
- uInt len;
-{
- if (len == 0) return;
- do {
- *dest++ = *source++; /* ??? to be unrolled */
- } while (--len != 0);
-}
-
-int zmemcmp(s1, s2, len)
- const Bytef* s1;
- const Bytef* s2;
- uInt len;
-{
- uInt j;
-
- for (j = 0; j < len; j++) {
- if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
- }
- return 0;
-}
-
-void zmemzero(dest, len)
- Bytef* dest;
- uInt len;
-{
- if (len == 0) return;
- do {
- *dest++ = 0; /* ??? to be unrolled */
- } while (--len != 0);
-}
-#endif
-
-
-#ifdef SYS16BIT
-
-#ifdef __TURBOC__
-/* Turbo C in 16-bit mode */
-
-# define MY_ZCALLOC
-
-/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
- * and farmalloc(64K) returns a pointer with an offset of 8, so we
- * must fix the pointer. Warning: the pointer must be put back to its
- * original form in order to free it, use zcfree().
- */
-
-#define MAX_PTR 10
-/* 10*64K = 640K */
-
-local int next_ptr = 0;
-
-typedef struct ptr_table_s {
- voidpf org_ptr;
- voidpf new_ptr;
-} ptr_table;
-
-local ptr_table table[MAX_PTR];
-/* This table is used to remember the original form of pointers
- * to large buffers (64K). Such pointers are normalized with a zero offset.
- * Since MSDOS is not a preemptive multitasking OS, this table is not
- * protected from concurrent access. This hack doesn't work anyway on
- * a protected system like OS/2. Use Microsoft C instead.
- */
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
- voidpf buf = opaque; /* just to make some compilers happy */
- ulg bsize = (ulg)items*size;
-
- /* If we allocate less than 65520 bytes, we assume that farmalloc
- * will return a usable pointer which doesn't have to be normalized.
- */
- if (bsize < 65520L) {
- buf = farmalloc(bsize);
- if (*(ush*)&buf != 0) return buf;
- } else {
- buf = farmalloc(bsize + 16L);
- }
- if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
- table[next_ptr].org_ptr = buf;
-
- /* Normalize the pointer to seg:0 */
- *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
- *(ush*)&buf = 0;
- table[next_ptr++].new_ptr = buf;
- return buf;
-}
-
-void zcfree (voidpf opaque, voidpf ptr)
-{
- int n;
- if (*(ush*)&ptr != 0) { /* object < 64K */
- farfree(ptr);
- return;
- }
- /* Find the original pointer */
- for (n = 0; n < next_ptr; n++) {
- if (ptr != table[n].new_ptr) continue;
-
- farfree(table[n].org_ptr);
- while (++n < next_ptr) {
- table[n-1] = table[n];
- }
- next_ptr--;
- return;
- }
- ptr = opaque; /* just to make some compilers happy */
- Assert(0, "zcfree: ptr not found");
-}
-
-#endif /* __TURBOC__ */
-
-
-#ifdef M_I86
-/* Microsoft C in 16-bit mode */
-
-# define MY_ZCALLOC
-
-#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
-# define _halloc halloc
-# define _hfree hfree
-#endif
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
- if (opaque) opaque = 0; /* to make compiler happy */
- return _halloc((long)items, size);
-}
-
-void zcfree (voidpf opaque, voidpf ptr)
-{
- if (opaque) opaque = 0; /* to make compiler happy */
- _hfree(ptr);
-}
-
-#endif /* M_I86 */
-
-#endif /* SYS16BIT */
-
-
-#ifndef MY_ZCALLOC /* Any system without a special alloc function */
-
-#ifndef STDC
-extern voidp malloc OF((uInt size));
-extern voidp calloc OF((uInt items, uInt size));
-extern void free OF((voidpf ptr));
-#endif
-
-voidpf zcalloc (opaque, items, size)
- voidpf opaque;
- unsigned items;
- unsigned size;
-{
- if (opaque) items += size - size; /* make compiler happy */
- return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
- (voidpf)calloc(items, size);
-}
-
-void zcfree (opaque, ptr)
- voidpf opaque;
- voidpf ptr;
-{
- free(ptr);
- if (opaque) return; /* make compiler happy */
-}
-
-#endif /* MY_ZCALLOC */
+/* zutil.c -- target dependent utility functions for the compression library + * Copyright (C) 1995-2003 Jean-loup Gailly. + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* @(#) $Id$ */ + +#include "zutil.h" + +#ifndef NO_DUMMY_DECL +struct internal_state {int dummy;}; /* for buggy compilers */ +#endif + +#ifndef STDC +extern void exit OF((int)); +#endif + +const char * const z_errmsg[10] = { +"need dictionary", /* Z_NEED_DICT 2 */ +"stream end", /* Z_STREAM_END 1 */ +"", /* Z_OK 0 */ +"file error", /* Z_ERRNO (-1) */ +"stream error", /* Z_STREAM_ERROR (-2) */ +"data error", /* Z_DATA_ERROR (-3) */ +"insufficient memory", /* Z_MEM_ERROR (-4) */ +"buffer error", /* Z_BUF_ERROR (-5) */ +"incompatible version",/* Z_VERSION_ERROR (-6) */ +""}; + + +const char * ZEXPORT zlibVersion() +{ + return ZLIB_VERSION; +} + +uLong ZEXPORT zlibCompileFlags() +{ + uLong flags; + + flags = 0; + switch (sizeof(uInt)) { + case 2: break; + case 4: flags += 1; break; + case 8: flags += 2; break; + default: flags += 3; + } + switch (sizeof(uLong)) { + case 2: break; + case 4: flags += 1 << 2; break; + case 8: flags += 2 << 2; break; + default: flags += 3 << 2; + } + switch (sizeof(voidpf)) { + case 2: break; + case 4: flags += 1 << 4; break; + case 8: flags += 2 << 4; break; + default: flags += 3 << 4; + } + switch (sizeof(z_off_t)) { + case 2: break; + case 4: flags += 1 << 6; break; + case 8: flags += 2 << 6; break; + default: flags += 3 << 6; + } +#ifdef DEBUG + flags += 1 << 8; +#endif +#if defined(ASMV) || defined(ASMINF) + flags += 1 << 9; +#endif +#ifdef ZLIB_WINAPI + flags += 1 << 10; +#endif +#ifdef BUILDFIXED + flags += 1 << 12; +#endif +#ifdef DYNAMIC_CRC_TABLE + flags += 1 << 13; +#endif +#ifdef NO_GZCOMPRESS + flags += 1 << 16; +#endif +#ifdef NO_GZIP + flags += 1 << 17; +#endif +#ifdef PKZIP_BUG_WORKAROUND + flags += 1 << 20; +#endif +#ifdef FASTEST + flags += 1 << 21; +#endif +#ifdef STDC +# ifdef NO_vsnprintf + flags += 1 << 25; +# ifdef HAS_vsprintf_void + flags += 1 << 26; +# endif +# else +# ifdef HAS_vsnprintf_void + flags += 1 << 26; +# endif +# endif +#else + flags += 1 << 24; +# ifdef NO_snprintf + flags += 1 << 25; +# ifdef HAS_sprintf_void + flags += 1 << 26; +# endif +# else +# ifdef HAS_snprintf_void + flags += 1 << 26; +# endif +# endif +#endif + return flags; +} + +#ifdef DEBUG + +# ifndef verbose +# define verbose 0 +# endif +int z_verbose = verbose; + +void z_error (m) + char *m; +{ + fprintf(stderr, "%s\n", m); + exit(1); +} +#endif + +/* exported to allow conversion of error code to string for compress() and + * uncompress() + */ +const char * ZEXPORT zError(err) + int err; +{ + return ERR_MSG(err); +} + +#if defined(_WIN32_WCE) + /* does not exist on WCE */ + int errno = 0; +#endif + +#ifndef HAVE_MEMCPY + +void zmemcpy(dest, source, len) + Bytef* dest; + const Bytef* source; + uInt len; +{ + if (len == 0) return; + do { + *dest++ = *source++; /* ??? to be unrolled */ + } while (--len != 0); +} + +int zmemcmp(s1, s2, len) + const Bytef* s1; + const Bytef* s2; + uInt len; +{ + uInt j; + + for (j = 0; j < len; j++) { + if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1; + } + return 0; +} + +void zmemzero(dest, len) + Bytef* dest; + uInt len; +{ + if (len == 0) return; + do { + *dest++ = 0; /* ??? to be unrolled */ + } while (--len != 0); +} +#endif + + +#ifdef SYS16BIT + +#ifdef __TURBOC__ +/* Turbo C in 16-bit mode */ + +# define MY_ZCALLOC + +/* Turbo C malloc() does not allow dynamic allocation of 64K bytes + * and farmalloc(64K) returns a pointer with an offset of 8, so we + * must fix the pointer. Warning: the pointer must be put back to its + * original form in order to free it, use zcfree(). + */ + +#define MAX_PTR 10 +/* 10*64K = 640K */ + +local int next_ptr = 0; + +typedef struct ptr_table_s { + voidpf org_ptr; + voidpf new_ptr; +} ptr_table; + +local ptr_table table[MAX_PTR]; +/* This table is used to remember the original form of pointers + * to large buffers (64K). Such pointers are normalized with a zero offset. + * Since MSDOS is not a preemptive multitasking OS, this table is not + * protected from concurrent access. This hack doesn't work anyway on + * a protected system like OS/2. Use Microsoft C instead. + */ + +voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) +{ + voidpf buf = opaque; /* just to make some compilers happy */ + ulg bsize = (ulg)items*size; + + /* If we allocate less than 65520 bytes, we assume that farmalloc + * will return a usable pointer which doesn't have to be normalized. + */ + if (bsize < 65520L) { + buf = farmalloc(bsize); + if (*(ush*)&buf != 0) return buf; + } else { + buf = farmalloc(bsize + 16L); + } + if (buf == NULL || next_ptr >= MAX_PTR) return NULL; + table[next_ptr].org_ptr = buf; + + /* Normalize the pointer to seg:0 */ + *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4; + *(ush*)&buf = 0; + table[next_ptr++].new_ptr = buf; + return buf; +} + +void zcfree (voidpf opaque, voidpf ptr) +{ + int n; + if (*(ush*)&ptr != 0) { /* object < 64K */ + farfree(ptr); + return; + } + /* Find the original pointer */ + for (n = 0; n < next_ptr; n++) { + if (ptr != table[n].new_ptr) continue; + + farfree(table[n].org_ptr); + while (++n < next_ptr) { + table[n-1] = table[n]; + } + next_ptr--; + return; + } + ptr = opaque; /* just to make some compilers happy */ + Assert(0, "zcfree: ptr not found"); +} + +#endif /* __TURBOC__ */ + + +#ifdef M_I86 +/* Microsoft C in 16-bit mode */ + +# define MY_ZCALLOC + +#if (!defined(_MSC_VER) || (_MSC_VER <= 600)) +# define _halloc halloc +# define _hfree hfree +#endif + +voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) +{ + if (opaque) opaque = 0; /* to make compiler happy */ + return _halloc((long)items, size); +} + +void zcfree (voidpf opaque, voidpf ptr) +{ + if (opaque) opaque = 0; /* to make compiler happy */ + _hfree(ptr); +} + +#endif /* M_I86 */ + +#endif /* SYS16BIT */ + + +#ifndef MY_ZCALLOC /* Any system without a special alloc function */ + +#ifndef STDC +extern voidp malloc OF((uInt size)); +extern voidp calloc OF((uInt items, uInt size)); +extern void free OF((voidpf ptr)); +#endif + +voidpf zcalloc (opaque, items, size) + voidpf opaque; + unsigned items; + unsigned size; +{ + if (opaque) items += size - size; /* make compiler happy */ + return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) : + (voidpf)calloc(items, size); +} + +void zcfree (opaque, ptr) + voidpf opaque; + voidpf ptr; +{ + free(ptr); + if (opaque) return; /* make compiler happy */ +} + +#endif /* MY_ZCALLOC */ |