zutil.cc File Reference

#include "zutil.h"

Go to the source code of this file.

Data Structures
struct	internal_state
Functions
void exit	OF ((int))
const char *ZEXPORT	zlibVersion ()
uLong ZEXPORT	zlibCompileFlags ()
const char *ZEXPORT	zError (int err)
void	zmemcpy (Bytef *dest, const Bytef *source, uInt len)
int	zmemcmp (const Bytef *s1, const Bytef *s2, uInt len)
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
const char *const	z_errmsg [10]

---

Function Documentation

void free OF

(

(voidpf ptr)

)

voidp calloc OF

(

(uInt items, uInt size)

)

voidp malloc OF

(

(uInt size)

)

void exit OF

(

(int)

)

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

Definition at line 291 of file zutil.cc.

Referenced by deflateInit2_().

{
    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
	)

Definition at line 298 of file zutil.cc.

Referenced by deflateInit2_().

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

const char* ZEXPORT zError

(

int

err

)

Definition at line 136 of file zutil.cc.

{
    return ERR_MSG(err);
}

uLong ZEXPORT zlibCompileFlags

(

)

Definition at line 36 of file zutil.cc.

{
    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 += 1 << 16;
#endif
#ifdef NO_GZIP
    flags += 1 << 17;
#endif
#ifdef PKZIP_BUG_WORKAROUND
    flags += 1 << 20;
#endif
#ifdef FASTEST
    flags += 1 << 21;
#endif
#ifdef STDC
#  ifdef NO_vsnprintf
        flags += 1 << 25;
#    ifdef HAS_vsprintf_void
        flags += 1 << 26;
#    endif
#  else
#    ifdef HAS_vsnprintf_void
        flags += 1 << 26;
#    endif
#  endif
#else
        flags += 1 << 24;
#  ifdef NO_snprintf
        flags += 1 << 25;
#    ifdef HAS_sprintf_void
        flags += 1 << 26;
#    endif
#  else
#    ifdef HAS_snprintf_void
        flags += 1 << 26;
#    endif
#  endif
#endif
    return flags;
}

const char* ZEXPORT zlibVersion

(

)

Definition at line 31 of file zutil.cc.

{
    return ZLIB_VERSION;
}

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

Definition at line 156 of file zutil.cc.

{
    uInt j;

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

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

Definition at line 148 of file zutil.cc.

Referenced by deflateCopy(), deflateSetDictionary(), fill_window(), flush_pending(), and read_buf().

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

void zmemzero	(	Bytef *	dest,
		uInt	len
	)

Definition at line 166 of file zutil.cc.

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

---

Variable Documentation

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 18 of file zutil.cc.

---