zutil.c File Reference

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

Include dependency graph for zutil.c:

Go to the source code of this file.

Classes
struct	internal_state

Functions
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)
const char *ZEXPORT	zError (int err)
uLong ZEXPORT	zlibCompileFlags ()
const char *ZEXPORT	zlibVersion ()
int ZLIB_INTERNAL	zmemcmp (Bytef *s1, const Bytef *s2, uInt len) const
void ZLIB_INTERNAL	zmemcpy (Bytef *dest, const Bytef *source, uInt len)
void ZLIB_INTERNAL	zmemzero (Bytef *dest, uInt len)

Variables
z_const char *const	z_errmsg [10]

Function Documentation

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
	)

Definition at line 304 of file zutil.c.

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

void ZLIB_INTERNAL zcfree	(	voidpf	opaque,
		voidpf	ptr
	)

Definition at line 314 of file zutil.c.

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

const char* ZEXPORT zError

(

int

err

)

Definition at line 136 of file zutil.c.

{
    return ERR_MSG(err);
}

uLong ZEXPORT zlibCompileFlags

(

)

Definition at line 35 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
#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 zlibVersion

(

)

Definition at line 30 of file zutil.c.

{
    return ZLIB_VERSION;
}

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

Definition at line 163 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;
}

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

Definition at line 152 of file zutil.c.

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

void ZLIB_INTERNAL zmemzero	(	Bytef*	dest,
		uInt	len
	)

Definition at line 176 of file zutil.c.

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

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",
""}

Definition at line 17 of file zutil.c.