zutil.c File Reference

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

Include dependency graph for zutil.c:

Classes
struct	internal_state

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

Variables
z_const char *const	z_errmsg [10]

Function Documentation

const char* ZEXPORT zlibVersion

(

)

{
    return ZLIB_VERSION;
}

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 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;
}

const char* ZEXPORT zError

(

int

err

)

{
    return ERR_MSG(err);
}

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

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

int 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;
}

void zmemzero	(	Bytef*	dest,
		uInt	len
	)

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

voidp malloc OF

(

(uInt size)

)

voidp calloc OF

(

(uInt items, uInt size)

)

void free OF

(

(voidpf ptr)

)

voidpf zcalloc	(	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	(	voidpf	opaque,
		voidpf	ptr
	)

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

Variable Documentation

z_const char* const z_errmsg[10]

Initial value:

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