zutil.c File Reference

#include "zutil.h"
#include "gzguts.h"

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 (Bytef *s1, const Bytef *s2, uInt len) const
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
z_const char *const	z_errmsg [10]

Function Documentation

zlibVersion()

const char* ZEXPORT zlibVersion

(

)

{
    return ZLIB_VERSION;
}

zlibCompileFlags()

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;
}

zError()

const char* ZEXPORT zError

(

int

err

)

{
    return ERR_MSG(err);
}

zmemcpy()

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

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

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zmemcmp()

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

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

zmemzero()

void ZLIB_INTERNAL zmemzero	(	Bytef*	dest,
		uInt	len
	)

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

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OF() [1/3]

voidp malloc OF

(

(uInt size)

)

OF() [2/3]

voidp calloc OF

(

(uInt items, uInt size)

)

OF() [3/3]

void free OF

(

(voidpf ptr)

)

zcalloc()

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

{
    (void)opaque;
    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
	)

{
    (void)opaque;
    free(ptr);
}

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Variable Documentation

z_errmsg

z_const char* const z_errmsg[10]

Initial value:

= {
    (z_const char *)"need dictionary",     
    (z_const char *)"stream end",          
    (z_const char *)"",                    
    (z_const char *)"file error",          
    (z_const char *)"stream error",        
    (z_const char *)"data error",          
    (z_const char *)"insufficient memory", 
    (z_const char *)"buffer error",        
    (z_const char *)"incompatible version",
    (z_const char *)""
}