mirror of
https://git.code.sf.net/p/libpng/code.git
synced 2025-07-10 18:04:09 +02:00
Imported from pngcrush-1.6.2.tar
This commit is contained in:
Glenn Randers-Pehrson
132
zutil.c
132
zutil.c
@@ -1,19 +1,17 @@
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/* zutil.c -- target dependent utility functions for the compression library
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* Copyright (C) 1995-1998 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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* Copyright (C) 1995-2005 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* @(#) $Id$ */
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#include "zutil.h"
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#ifndef NO_DUMMY_DECL
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struct internal_state {int dummy;}; /* for buggy compilers */
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#ifndef STDC
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extern void exit OF((int));
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#endif
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const char *z_errmsg[10] = {
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const char * const z_errmsg[10] = {
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"need dictionary", /* Z_NEED_DICT 2 */
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"stream end", /* Z_STREAM_END 1 */
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"", /* Z_OK 0 */
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@@ -31,6 +29,89 @@ const char * ZEXPORT zlibVersion()
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return ZLIB_VERSION;
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}
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uLong ZEXPORT zlibCompileFlags()
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{
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uLong flags;
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flags = 0;
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switch (sizeof(uInt)) {
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case 2: break;
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case 4: flags += 1; break;
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case 8: flags += 2; break;
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default: flags += 3;
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}
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switch (sizeof(uLong)) {
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case 2: break;
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case 4: flags += 1 << 2; break;
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case 8: flags += 2 << 2; break;
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default: flags += 3 << 2;
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}
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switch (sizeof(voidpf)) {
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case 2: break;
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case 4: flags += 1 << 4; break;
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case 8: flags += 2 << 4; break;
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default: flags += 3 << 4;
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}
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switch (sizeof(z_off_t)) {
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case 2: break;
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case 4: flags += 1 << 6; break;
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case 8: flags += 2 << 6; break;
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default: flags += 3 << 6;
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}
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#ifdef DEBUG
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flags += 1 << 8;
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#endif
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#if defined(ASMV) || defined(ASMINF)
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flags += 1 << 9;
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#endif
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#ifdef ZLIB_WINAPI
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flags += 1 << 10;
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#endif
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#ifdef BUILDFIXED
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flags += 1 << 12;
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#endif
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#ifdef DYNAMIC_CRC_TABLE
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flags += 1 << 13;
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#endif
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#ifdef NO_GZCOMPRESS
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flags += 1L << 16;
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#endif
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#ifdef NO_GZIP
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flags += 1L << 17;
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#endif
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#ifdef PKZIP_BUG_WORKAROUND
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flags += 1L << 20;
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#endif
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#ifdef FASTEST
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flags += 1L << 21;
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#endif
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#ifdef STDC
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# ifdef NO_vsnprintf
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flags += 1L << 25;
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# ifdef HAS_vsprintf_void
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flags += 1L << 26;
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# endif
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# else
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# ifdef HAS_vsnprintf_void
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flags += 1L << 26;
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# endif
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# endif
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#else
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flags += 1L << 24;
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# ifdef NO_snprintf
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flags += 1L << 25;
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# ifdef HAS_sprintf_void
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flags += 1L << 26;
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# endif
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# else
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# ifdef HAS_snprintf_void
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flags += 1L << 26;
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# endif
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# endif
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#endif
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return flags;
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}
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#ifdef DEBUG
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# ifndef verbose
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@@ -55,6 +136,13 @@ const char * ZEXPORT zError(err)
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return ERR_MSG(err);
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}
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#if defined(_WIN32_WCE)
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/* The Microsoft C Run-Time Library for Windows CE doesn't have
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* errno. We define it as a global variable to simplify porting.
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* Its value is always 0 and should not be used.
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*/
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int errno = 0;
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#endif
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#ifndef HAVE_MEMCPY
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@@ -93,11 +181,12 @@ void zmemzero(dest, len)
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}
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#endif
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#ifdef SYS16BIT
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#ifdef __TURBOC__
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#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
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/* Small and medium model in Turbo C are for now limited to near allocation
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* with reduced MAX_WBITS and MAX_MEM_LEVEL
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*/
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/* Turbo C in 16-bit mode */
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# define MY_ZCALLOC
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/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
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@@ -169,11 +258,11 @@ void zcfree (voidpf opaque, voidpf ptr)
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ptr = opaque; /* just to make some compilers happy */
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Assert(0, "zcfree: ptr not found");
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}
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#endif
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#endif /* __TURBOC__ */
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#if defined(M_I86) && !defined(__32BIT__)
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#ifdef M_I86
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/* Microsoft C in 16-bit mode */
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# define MY_ZCALLOC
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@@ -195,14 +284,16 @@ void zcfree (voidpf opaque, voidpf ptr)
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_hfree(ptr);
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}
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#endif /* MSC */
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#endif /* M_I86 */
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#endif /* SYS16BIT */
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#ifndef MY_ZCALLOC /* Any system without a special alloc function */
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#ifndef STDC
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extern voidp malloc OF((uInt size));
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extern voidp calloc OF((uInt items, uInt size));
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extern voidp malloc OF((uInt items));
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extern void free OF((voidpf ptr));
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#endif
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@@ -212,17 +303,8 @@ voidpf zcalloc (opaque, items, size)
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unsigned size;
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{
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if (opaque) items += size - size; /* make compiler happy */
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return (voidpf)calloc(items, size);
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}
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/* added to version 1.1.3pc -- glennrp */
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voidpf zmalloc (opaque, items, size)
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voidpf opaque;
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unsigned items;
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unsigned size;
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{
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if (opaque) items += size - size; /* make compiler happy */
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return (voidpf)malloc(items * size);
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return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
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(voidpf)calloc(items, size);
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}
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void zcfree (opaque, ptr)
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