zutil.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "misc/util/abc_global.h"
#include "zutil.h"

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Classes
struct	internal_state

Functions
const char *ZEXPORT	zlibVersion ()
uLong ZEXPORT	zlibCompileFlags ()
const char *ZEXPORT	zError (int err)
void ZLIB_INTERNAL	zmemcpy (Bytef *dest, const Bytef *source, uInt len)
int ZLIB_INTERNAL	zmemcmp (const Bytef *s1, const Bytef *s2, uInt len)
void ZLIB_INTERNAL	zmemzero (Bytef *dest, uInt len)
voidp malloc	OF ((uInt size))
voidp calloc	OF ((uInt items, uInt size))
void free	OF ((voidpf ptr))
voidpf ZLIB_INTERNAL	zcalloc (voidpf opaque, unsigned items, unsigned size)
void ZLIB_INTERNAL	zcfree (voidpf opaque, voidpf ptr)

Variables
const char *const	z_errmsg [10]

Function Documentation

OF() [1/3]

voidp calloc OF ( (uInt items, uInt size) )

extern

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OF() [2/3]

voidp malloc OF ( (uInt size) )

extern

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OF() [3/3]

void free OF ( (voidpf ptr) )

extern

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zcalloc()

voidpf ZLIB_INTERNAL zcalloc	(	voidpf	opaque,
		unsigned	items,
		unsigned	size )

Definition at line 300 of file zutil.c.

{
    if (opaque) items += size - size; /* make compiler happy */
    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
                              (voidpf)calloc(items, size);
}

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zcfree()

void ZLIB_INTERNAL zcfree	(	voidpf	opaque,
		voidpf	ptr )

Definition at line 307 of file zutil.c.

{
    free(ptr);
    if (opaque) return; /* make compiler happy */
}

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zError()

const char *ZEXPORT zError

(

int

err

)

Definition at line 142 of file zutil.c.

{
    return ERR_MSG(err);
}

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zlibCompileFlags()

uLong ZEXPORT zlibCompileFlags

(

)

Definition at line 41 of file zutil.c.

{
    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 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;
}

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zlibVersion()

const char *ZEXPORT zlibVersion

(

)

Definition at line 36 of file zutil.c.

{
    return ZLIB_VERSION;
}

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zmemcmp()

int ZLIB_INTERNAL zmemcmp	(	const Bytef *	s1,
		const Bytef *	s2,
		uInt	len )

Definition at line 165 of file zutil.c.

{
    uInt j;
 
    for (j = 0; j < len; j++) {
        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
    }
    return 0;
}

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zmemcpy()

void ZLIB_INTERNAL zmemcpy	(	Bytef *	dest,
		const Bytef *	source,
		uInt	len )

Definition at line 157 of file zutil.c.

{
    if (len == 0) return;
    do {
        *dest++ = *source++; /* ??? to be unrolled */
    } while (--len != 0);
}

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zmemzero()

void ZLIB_INTERNAL zmemzero	(	Bytef *	dest,
		uInt	len )

Definition at line 175 of file zutil.c.

{
    if (len == 0) return;
    do {
        *dest++ = 0;  /* ??? to be unrolled */
    } while (--len != 0);
}

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Variable Documentation

z_errmsg

const char* const z_errmsg[10]

Initial value:

= {
"need dictionary",     
"stream end",          
"",                    
"file error",          
"stream error",        
"data error",          
"insufficient memory", 
"buffer error",        
"incompatible version",
""}

Definition at line 23 of file zutil.c.

                                  {
"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) */
""};