reusing existing API

[wxWidgets.git] / src / zlib / zutil.c

diff --git a/src/zlib/zutil.c b/src/zlib/zutil.c
index 5a3fe6e0a5d6c2d716d6d441a9219bf89f496b64..d55f5948a37f181c003dd4572b660727132eaba1 100644 (file)
--- a/src/zlib/zutil.c
+++ b/src/zlib/zutil.c
@@ -1,19 +1,17 @@
 /* zutil.c -- target dependent utility functions for the compression library
 /* zutil.c -- target dependent utility functions for the compression library

- * Copyright (C) 1995-1998 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h 
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h

  */
 
 /* @(#) $Id$ */
 
 #include "zutil.h"
 
  */
 
 /* @(#) $Id$ */
 
 #include "zutil.h"
 

+#ifndef NO_DUMMY_DECL

 struct internal_state      {int dummy;}; /* for buggy compilers */
 struct internal_state      {int dummy;}; /* for buggy compilers */

-
-#ifndef STDC
-extern void exit OF((int));

 #endif
 
 #endif
 

-const char *z_errmsg[10] = {
+const char * const z_errmsg[10] = {

 "need dictionary",     /* Z_NEED_DICT       2  */
 "stream end",          /* Z_STREAM_END      1  */
 "",                    /* Z_OK              0  */
 "need dictionary",     /* Z_NEED_DICT       2  */
 "stream end",          /* Z_STREAM_END      1  */
 "",                    /* Z_OK              0  */


@@ -31,6 +29,89 @@ const char * ZEXPORT zlibVersion()
     return ZLIB_VERSION;
 }
 
     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 += 1L << 16;
+#endif
+#ifdef NO_GZIP
+    flags += 1L << 17;
+#endif
+#ifdef PKZIP_BUG_WORKAROUND
+    flags += 1L << 20;
+#endif
+#ifdef FASTEST
+    flags += 1L << 21;
+#endif
+#ifdef STDC
+#  ifdef NO_vsnprintf
+        flags += 1L << 25;
+#    ifdef HAS_vsprintf_void
+        flags += 1L << 26;
+#    endif
+#  else
+#    ifdef HAS_vsnprintf_void
+        flags += 1L << 26;
+#    endif
+#  endif
+#else
+        flags += 1L << 24;
+#  ifdef NO_snprintf
+        flags += 1L << 25;
+#    ifdef HAS_sprintf_void
+        flags += 1L << 26;
+#    endif
+#  else
+#    ifdef HAS_snprintf_void
+        flags += 1L << 26;
+#    endif
+#  endif
+#endif
+    return flags;
+}
+

 #ifdef DEBUG
 
 #  ifndef verbose
 #ifdef DEBUG
 
 #  ifndef verbose


@@ -55,12 +136,19 @@ const char * ZEXPORT zError(err)
     return ERR_MSG(err);
 }
 
     return ERR_MSG(err);
 }
 

+#if defined(_WIN32_WCE)
+    /* The Microsoft C Run-Time Library for Windows CE doesn't have
+     * errno.  We define it as a global variable to simplify porting.
+     * Its value is always 0 and should not be used.
+     */
+    int errno = 0;
+#endif

 
 #ifndef HAVE_MEMCPY
 
 void zmemcpy(dest, source, len)
     Bytef* dest;
 
 #ifndef HAVE_MEMCPY
 
 void zmemcpy(dest, source, len)
     Bytef* dest;

-    Bytef* source;
+    const Bytef* source;

     uInt  len;
 {
     if (len == 0) return;
     uInt  len;
 {
     if (len == 0) return;


@@ -70,8 +158,8 @@ void zmemcpy(dest, source, len)
 }
 
 int zmemcmp(s1, s2, len)
 }
 
 int zmemcmp(s1, s2, len)

-    Bytef* s1;
-    Bytef* s2;
+    const Bytef* s1;
+    const Bytef* s2;

     uInt  len;
 {
     uInt j;
     uInt  len;
 {
     uInt j;


@@ -93,11 +181,12 @@ void zmemzero(dest, len)
 }
 #endif
 
 }
 #endif
 

+
+#ifdef SYS16BIT
+

 #ifdef __TURBOC__
 #ifdef __TURBOC__

-#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
-/* Small and medium model in Turbo C are for now limited to near allocation
- * with reduced MAX_WBITS and MAX_MEM_LEVEL
- */
+/* Turbo C in 16-bit mode */
+

 #  define MY_ZCALLOC
 
 /* Turbo C malloc() does not allow dynamic allocation of 64K bytes
 #  define MY_ZCALLOC
 
 /* Turbo C malloc() does not allow dynamic allocation of 64K bytes


@@ -169,16 +258,16 @@ void  zcfree (voidpf opaque, voidpf ptr)
     ptr = opaque; /* just to make some compilers happy */
     Assert(0, "zcfree: ptr not found");
 }
     ptr = opaque; /* just to make some compilers happy */
     Assert(0, "zcfree: ptr not found");
 }

-#endif
+

 #endif /* __TURBOC__ */
 
 
 #endif /* __TURBOC__ */
 
 

-#if defined(M_I86) && !defined(__32BIT__)
+#ifdef M_I86

 /* Microsoft C in 16-bit mode */
 
 #  define MY_ZCALLOC
 
 /* Microsoft C in 16-bit mode */
 
 #  define MY_ZCALLOC
 

-#if (!defined(_MSC_VER) || (_MSC_VER < 600))
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))

 #  define _halloc  halloc
 #  define _hfree   hfree
 #endif
 #  define _halloc  halloc
 #  define _hfree   hfree
 #endif


@@ -195,12 +284,15 @@ void  zcfree (voidpf opaque, voidpf ptr)
     _hfree(ptr);
 }
 
     _hfree(ptr);
 }
 

-#endif /* MSC */
+#endif /* M_I86 */
+
+#endif /* SYS16BIT */

 
 
 #ifndef MY_ZCALLOC /* Any system without a special alloc function */
 
 #ifndef STDC
 
 
 #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
 extern voidp  calloc OF((uInt items, uInt size));
 extern void   free   OF((voidpf ptr));
 #endif


@@ -211,7 +303,8 @@ voidpf zcalloc (opaque, items, size)
     unsigned size;
 {
     if (opaque) items += size - size; /* make compiler happy */
     unsigned size;
 {
     if (opaque) items += size - size; /* make compiler happy */

-    return (voidpf)calloc(items, size);
+    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+                              (voidpf)calloc(items, size);

 }
 
 void  zcfree (opaque, ptr)
 }
 
 void  zcfree (opaque, ptr)