klibc/zlib/zutil.c

/* zutil.c -- target dependent utility functions for the compression library
 * Copyright (C) 1995-2005 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

/* @(#) $Id: zutil.c,v 1.1 2007-09-01 22:44:22 niro Exp $ */

#include "zutil.h"

#ifndef NO_DUMMY_DECL
struct internal_state      {int dummy;}; /* for buggy compilers */
#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 += 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
#    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)
    /* 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;
    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 */
1	niro	532	/* zutil.c -- target dependent utility functions for the compression library
2			* Copyright (C) 1995-2005 Jean-loup Gailly.
3			* For conditions of distribution and use, see copyright notice in zlib.h
4			*/
5
6			/* @(#) $Id: zutil.c,v 1.1 2007-09-01 22:44:22 niro Exp $ */
7
8			#include "zutil.h"
9
10			#ifndef NO_DUMMY_DECL
11			struct internal_state {int dummy;}; /* for buggy compilers */
12			#endif
13
14			const char * const z_errmsg[10] = {
15			"need dictionary", /* Z_NEED_DICT 2 */
16			"stream end", /* Z_STREAM_END 1 */
17			"", /* Z_OK 0 */
18			"file error", /* Z_ERRNO (-1) */
19			"stream error", /* Z_STREAM_ERROR (-2) */
20			"data error", /* Z_DATA_ERROR (-3) */
21			"insufficient memory", /* Z_MEM_ERROR (-4) */
22			"buffer error", /* Z_BUF_ERROR (-5) */
23			"incompatible version",/* Z_VERSION_ERROR (-6) */
24			""};
25
26
27			const char * ZEXPORT zlibVersion()
28			{
29			return ZLIB_VERSION;
30			}
31
32			uLong ZEXPORT zlibCompileFlags()
33			{
34			uLong flags;
35
36			flags = 0;
37			switch (sizeof(uInt)) {
38			case 2: break;
39			case 4: flags += 1; break;
40			case 8: flags += 2; break;
41			default: flags += 3;
42			}
43			switch (sizeof(uLong)) {
44			case 2: break;
45			case 4: flags += 1 << 2; break;
46			case 8: flags += 2 << 2; break;
47			default: flags += 3 << 2;
48			}
49			switch (sizeof(voidpf)) {
50			case 2: break;
51			case 4: flags += 1 << 4; break;
52			case 8: flags += 2 << 4; break;
53			default: flags += 3 << 4;
54			}
55			switch (sizeof(z_off_t)) {
56			case 2: break;
57			case 4: flags += 1 << 6; break;
58			case 8: flags += 2 << 6; break;
59			default: flags += 3 << 6;
60			}
61			#ifdef DEBUG
62			flags += 1 << 8;
63			#endif
64			#if defined(ASMV) \|\| defined(ASMINF)
65			flags += 1 << 9;
66			#endif
67			#ifdef ZLIB_WINAPI
68			flags += 1 << 10;
69			#endif
70			#ifdef BUILDFIXED
71			flags += 1 << 12;
72			#endif
73			#ifdef DYNAMIC_CRC_TABLE
74			flags += 1 << 13;
75			#endif
76			#ifdef NO_GZCOMPRESS
77			flags += 1L << 16;
78			#endif
79			#ifdef NO_GZIP
80			flags += 1L << 17;
81			#endif
82			#ifdef PKZIP_BUG_WORKAROUND
83			flags += 1L << 20;
84			#endif
85			#ifdef FASTEST
86			flags += 1L << 21;
87			#endif
88			#ifdef STDC
89			# ifdef NO_vsnprintf
90			flags += 1L << 25;
91			# ifdef HAS_vsprintf_void
92			flags += 1L << 26;
93			# endif
94			# else
95			# ifdef HAS_vsnprintf_void
96			flags += 1L << 26;
97			# endif
98			# endif
99			#else
100			flags += 1L << 24;
101			# ifdef NO_snprintf
102			flags += 1L << 25;
103			# ifdef HAS_sprintf_void
104			flags += 1L << 26;
105			# endif
106			# else
107			# ifdef HAS_snprintf_void
108			flags += 1L << 26;
109			# endif
110			# endif
111			#endif
112			return flags;
113			}
114
115			#ifdef DEBUG
116
117			# ifndef verbose
118			# define verbose 0
119			# endif
120			int z_verbose = verbose;
121
122			void z_error (m)
123			char *m;
124			{
125			fprintf(stderr, "%s\n", m);
126			exit(1);
127			}
128			#endif
129
130			/* exported to allow conversion of error code to string for compress() and
131			* uncompress()
132			*/
133			const char * ZEXPORT zError(err)
134			int err;
135			{
136			return ERR_MSG(err);
137			}
138
139			#if defined(_WIN32_WCE)
140			/* The Microsoft C Run-Time Library for Windows CE doesn't have
141			* errno. We define it as a global variable to simplify porting.
142			* Its value is always 0 and should not be used.
143			*/
144			int errno = 0;
145			#endif
146
147			#ifndef HAVE_MEMCPY
148
149			void zmemcpy(dest, source, len)
150			Bytef* dest;
151			const Bytef* source;
152			uInt len;
153			{
154			if (len == 0) return;
155			do {
156			dest++ = source++; /* ??? to be unrolled */
157			} while (--len != 0);
158			}
159
160			int zmemcmp(s1, s2, len)
161			const Bytef* s1;
162			const Bytef* s2;
163			uInt len;
164			{
165			uInt j;
166
167			for (j = 0; j < len; j++) {
168			if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
169			}
170			return 0;
171			}
172
173			void zmemzero(dest, len)
174			Bytef* dest;
175			uInt len;
176			{
177			if (len == 0) return;
178			do {
179			dest++ = 0; / ??? to be unrolled */
180			} while (--len != 0);
181			}
182			#endif
183
184
185			#ifdef SYS16BIT
186
187			#ifdef __TURBOC__
188			/* Turbo C in 16-bit mode */
189
190			# define MY_ZCALLOC
191
192			/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
193			* and farmalloc(64K) returns a pointer with an offset of 8, so we
194			* must fix the pointer. Warning: the pointer must be put back to its
195			* original form in order to free it, use zcfree().
196			*/
197
198			#define MAX_PTR 10
199			/* 1064K = 640K /
200
201			local int next_ptr = 0;
202
203			typedef struct ptr_table_s {
204			voidpf org_ptr;
205			voidpf new_ptr;
206			} ptr_table;
207
208			local ptr_table table[MAX_PTR];
209			/* This table is used to remember the original form of pointers
210			* to large buffers (64K). Such pointers are normalized with a zero offset.
211			* Since MSDOS is not a preemptive multitasking OS, this table is not
212			* protected from concurrent access. This hack doesn't work anyway on
213			* a protected system like OS/2. Use Microsoft C instead.
214			*/
215
216			voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
217			{
218			voidpf buf = opaque; /* just to make some compilers happy */
219			ulg bsize = (ulg)items*size;
220
221			/* If we allocate less than 65520 bytes, we assume that farmalloc
222			* will return a usable pointer which doesn't have to be normalized.
223			*/
224			if (bsize < 65520L) {
225			buf = farmalloc(bsize);
226			if ((ush)&buf != 0) return buf;
227			} else {
228			buf = farmalloc(bsize + 16L);
229			}
230			if (buf == NULL \|\| next_ptr >= MAX_PTR) return NULL;
231			table[next_ptr].org_ptr = buf;
232
233			/* Normalize the pointer to seg:0 */
234			((ush)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
235			(ush)&buf = 0;
236			table[next_ptr++].new_ptr = buf;
237			return buf;
238			}
239
240			void zcfree (voidpf opaque, voidpf ptr)
241			{
242			int n;
243			if ((ush)&ptr != 0) { /* object < 64K */
244			farfree(ptr);
245			return;
246			}
247			/* Find the original pointer */
248			for (n = 0; n < next_ptr; n++) {
249			if (ptr != table[n].new_ptr) continue;
250
251			farfree(table[n].org_ptr);
252			while (++n < next_ptr) {
253			table[n-1] = table[n];
254			}
255			next_ptr--;
256			return;
257			}
258			ptr = opaque; /* just to make some compilers happy */
259			Assert(0, "zcfree: ptr not found");
260			}
261
262			#endif /* __TURBOC__ */
263
264
265			#ifdef M_I86
266			/* Microsoft C in 16-bit mode */
267
268			# define MY_ZCALLOC
269
270			#if (!defined(_MSC_VER) \|\| (_MSC_VER <= 600))
271			# define _halloc halloc
272			# define _hfree hfree
273			#endif
274
275			voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
276			{
277			if (opaque) opaque = 0; /* to make compiler happy */
278			return _halloc((long)items, size);
279			}
280
281			void zcfree (voidpf opaque, voidpf ptr)
282			{
283			if (opaque) opaque = 0; /* to make compiler happy */
284			_hfree(ptr);
285			}
286
287			#endif /* M_I86 */
288
289			#endif /* SYS16BIT */
290
291
292			#ifndef MY_ZCALLOC /* Any system without a special alloc function */
293
294			#ifndef STDC
295			extern voidp malloc OF((uInt size));
296			extern voidp calloc OF((uInt items, uInt size));
297			extern void free OF((voidpf ptr));
298			#endif
299
300			voidpf zcalloc (opaque, items, size)
301			voidpf opaque;
302			unsigned items;
303			unsigned size;
304			{
305			if (opaque) items += size - size; /* make compiler happy */
306			return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
307			(voidpf)calloc(items, size);
308			}
309
310			void zcfree (opaque, ptr)
311			voidpf opaque;
312			voidpf ptr;
313			{
314			free(ptr);
315			if (opaque) return; /* make compiler happy */
316			}
317
318			#endif /* MY_ZCALLOC */