X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=zutil.c;h=dcab28a0d5177a5f9c051cf33b11b257e9c1c7fe;hb=deb44b57429b05d4ad5b4f793c969e58a9328f06;hp=9fd4ecc658f5801fb882348c94694a2ce3b298b3;hpb=913afb9174bb474104049906c1382dec81826424;p=zlib.git

diff --git a/zutil.c b/zutil.c
index 9fd4ecc..dcab28a 100644
--- a/zutil.c
+++ b/zutil.c
@@ -1,62 +1,194 @@
 /* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h 
+ * Copyright (C) 1995-2017 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
-/* $Id: zutil.c,v 1.5 1995/04/14 21:30:23 jloup Exp $ */
-
-#include <stdio.h>
+/* @(#) $Id$ */
 
 #include "zutil.h"
+#ifndef Z_SOLO
+#  include "gzguts.h"
+#endif
 
-extern void exit __P((int));
-
-char *zlib_version = ZLIB_VERSION;
+z_const char * const z_errmsg[10] = {
+    (z_const char *)"need dictionary",     /* Z_NEED_DICT       2  */
+    (z_const char *)"stream end",          /* Z_STREAM_END      1  */
+    (z_const char *)"",                    /* Z_OK              0  */
+    (z_const char *)"file error",          /* Z_ERRNO         (-1) */
+    (z_const char *)"stream error",        /* Z_STREAM_ERROR  (-2) */
+    (z_const char *)"data error",          /* Z_DATA_ERROR    (-3) */
+    (z_const char *)"insufficient memory", /* Z_MEM_ERROR     (-4) */
+    (z_const char *)"buffer error",        /* Z_BUF_ERROR     (-5) */
+    (z_const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
+    (z_const char *)""
+};
+
+
+const char * ZEXPORT zlibVersion()
+{
+    return ZLIB_VERSION;
+}
 
-char *z_errmsg[] = {
-"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) */
-""};
+uLong ZEXPORT zlibCompileFlags()
+{
+    uLong flags;
+
+    flags = 0;
+    switch ((int)(sizeof(uInt))) {
+    case 2:     break;
+    case 4:     flags += 1;     break;
+    case 8:     flags += 2;     break;
+    default:    flags += 3;
+    }
+    switch ((int)(sizeof(uLong))) {
+    case 2:     break;
+    case 4:     flags += 1 << 2;        break;
+    case 8:     flags += 2 << 2;        break;
+    default:    flags += 3 << 2;
+    }
+    switch ((int)(sizeof(voidpf))) {
+    case 2:     break;
+    case 4:     flags += 1 << 4;        break;
+    case 8:     flags += 2 << 4;        break;
+    default:    flags += 3 << 4;
+    }
+    switch ((int)(sizeof(z_off_t))) {
+    case 2:     break;
+    case 4:     flags += 1 << 6;        break;
+    case 8:     flags += 2 << 6;        break;
+    default:    flags += 3 << 6;
+    }
+#ifdef ZLIB_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
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)
+#  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 ZLIB_DEBUG
+#include <stdlib.h>
+#  ifndef verbose
+#    define verbose 0
+#  endif
+int ZLIB_INTERNAL z_verbose = verbose;
 
-void z_error (m)
+void ZLIB_INTERNAL 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) && _WIN32_WCE < 0x800
+    /* The older 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)
-    Byte* dest;
-    Byte* source;
+void ZLIB_INTERNAL zmemcpy(dest, source, len)
+    Bytef* dest;
+    const Bytef* source;
     uInt  len;
 {
     if (len == 0) return;
     do {
-	*dest++ = *source++; /* ??? to be unrolled */
+        *dest++ = *source++; /* ??? to be unrolled */
     } while (--len != 0);
 }
 
-void zmemzero(dest, len)
-    Byte* dest;
+int ZLIB_INTERNAL 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 ZLIB_INTERNAL zmemzero(dest, len)
+    Bytef* dest;
     uInt  len;
 {
     if (len == 0) return;
     do {
-	*dest++ = 0;  /* ??? to be unrolled */
+        *dest++ = 0;  /* ??? to be unrolled */
     } while (--len != 0);
 }
 #endif
 
-#if defined(MSDOS) && !defined(USE_CALLOC)
-#  ifdef __TURBOC__
+#ifndef Z_SOLO
+
+#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
@@ -70,8 +202,8 @@ void zmemzero(dest, len)
 local int next_ptr = 0;
 
 typedef struct ptr_table_s {
-    voidp org_ptr;
-    voidp new_ptr;
+    voidpf org_ptr;
+    voidpf new_ptr;
 } ptr_table;
 
 local ptr_table table[MAX_PTR];
@@ -82,16 +214,21 @@ local ptr_table table[MAX_PTR];
  * a protected system like OS/2. Use Microsoft C instead.
  */
 
-voidp zcalloc (voidp opaque, unsigned items, unsigned size)
+voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size)
 {
-    voidp buf;
+    voidpf buf;
     ulg bsize = (ulg)items*size;
 
-    if (bsize < 65536L) {
-	buf = farmalloc(bsize);
-	if (*(ush*)&buf != 0) return buf;
+    (void)opaque;
+
+    /* 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);
+        buf = farmalloc(bsize + 16L);
     }
     if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
     table[next_ptr].org_ptr = buf;
@@ -103,64 +240,86 @@ voidp zcalloc (voidp opaque, unsigned items, unsigned size)
     return buf;
 }
 
-void  zcfree (voidp opaque, voidp ptr)
+void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
 {
     int n;
+
+    (void)opaque;
+
     if (*(ush*)&ptr != 0) { /* object < 64K */
-	farfree(ptr);
-	return;
+        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;
+        if (ptr != table[n].new_ptr) continue;
+
+        farfree(table[n].org_ptr);
+        while (++n < next_ptr) {
+            table[n-1] = table[n];
+        }
+        next_ptr--;
+        return;
     }
-    z_error("zcfree: ptr not found");
+    Assert(0, "zcfree: ptr not found");
 }
 
-#  else /* MSC */
+#endif /* __TURBOC__ */
+
+
+#ifdef M_I86
+/* Microsoft C in 16-bit mode */
 
-#if (!defined(_MSC_VER) || (_MSC_VER < 600))
+#  define MY_ZCALLOC
+
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
 #  define _halloc  halloc
 #  define _hfree   hfree
 #endif
 
-voidp zcalloc (voidp opaque, unsigned items, unsigned size)
+voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size)
 {
+    (void)opaque;
     return _halloc((long)items, size);
 }
 
-void  zcfree (voidp opaque, voidp ptr)
+void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
 {
+    (void)opaque;
     _hfree(ptr);
 }
 
-#  endif /* __TURBOC__ ? */
+#endif /* M_I86 */
+
+#endif /* SYS16BIT */
 
-#else /* !MSDOS */
 
-extern voidp calloc __P((uInt items, uInt size));
-extern void  free   __P((voidp ptr));
+#ifndef MY_ZCALLOC /* Any system without a special alloc function */
 
-voidp zcalloc (opaque, items, size)
-    voidp opaque;
+#ifndef STDC
+extern voidp  malloc OF((uInt size));
+extern voidp  calloc OF((uInt items, uInt size));
+extern void   free   OF((voidpf ptr));
+#endif
+
+voidpf ZLIB_INTERNAL zcalloc (opaque, items, size)
+    voidpf opaque;
     unsigned items;
     unsigned size;
 {
-    return calloc(items, size);
+    (void)opaque;
+    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+                              (voidpf)calloc(items, size);
 }
 
-void  zcfree (opaque, ptr)
-    voidp opaque;
-    voidp ptr;
+void ZLIB_INTERNAL zcfree (opaque, ptr)
+    voidpf opaque;
+    voidpf ptr;
 {
+    (void)opaque;
     free(ptr);
 }
 
-#endif /* MSDOS */
+#endif /* MY_ZCALLOC */
+
+#endif /* !Z_SOLO */