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/*
* These routines are helpers - note that this file gets linked into all the
* zip-access variants that refer to <zzip/format.h>. On the x86 platform the
* actual definitions will be empty - fetching is done on native machine-level
*
* Author:
* Guido Draheim <guidod@gmx.de>
*
* Copyright (c) 2004,2005,2006 Guido Draheim
* All rights reserved,
* use under the restrictions of the
* Lesser GNU General Public License
* or alternatively the restrictions
* of the Mozilla Public License 1.1
*/
#include <zzip/fetch.h>
/* ------------------------- fetch helpers --------------------------------- */
/**
* Make 32 bit value in host byteorder from little-endian mapped octet-data
* (works also on machines which SIGBUS on misaligned data access (eg. 68000))
*/
uint32_t
__zzip_get32(unsigned char *s)
{
#if defined __ZZIP_GET32
return __ZZIP_GET32(s);
#else
return ((uint32_t) s[3] << 24) | ((uint32_t) s[2] << 16)
| ((uint32_t) s[1] << 8) | ((uint32_t) s[0]);
#endif
}
/** => __zzip_get32
* This function does the same for a 16 bit value.
*/
uint16_t
__zzip_get16(unsigned char *s)
{
#if defined __ZZIP_GET16
return __ZZIP_GET16(s);
#else
return ((uint16_t) s[1] << 8) | ((uint16_t) s[0]);
#endif
}
/** => __zzip_get32
* This function does the same for an off64_t value.
*/
uint64_t
__zzip_get64(unsigned char *s)
{
#ifdef __GNUC__
/* *INDENT-OFF* */
register uint64_t v
= s[7]; v <<= 8;
v |= s[6]; v <<= 8;
v |= s[5]; v <<= 8;
v |= s[4]; v <<= 8;
v |= s[3]; v <<= 8;
v |= s[2]; v <<= 8;
v |= s[1]; v <<= 8;
v |= s[0]; return v;
/* *INDENT-ON* */
#else
return ((uint64_t) s[7] << 56) | ((uint64_t) s[6] << 48)
| ((uint64_t) s[5] << 40) | ((uint64_t) s[4] << 32)
| ((uint64_t) s[3] << 24) | ((uint64_t) s[2] << 16)
| ((uint64_t) s[1] << 8) | ((uint64_t) s[0]);
#endif
}
/** => __zzip_get32
* This function pushes a 32bit value at the specified address
*/
void
__zzip_set32(unsigned char *s, uint32_t v)
{
#if defined __ZZIP_SET32
return __ZZIP_SET32(s, v);
#else
/* *INDENT-OFF* */
s[0] = (unsigned char) (v); v >>= 8;
s[1] = (unsigned char) (v); v >>= 8;
s[2] = (unsigned char) (v); v >>= 8;
s[3] = (unsigned char) (v);
/* *INDENT-ON* */
#endif
}
/** => __zzip_get32
* This function does the same for a 16 bit value.
*/
void
__zzip_set16(unsigned char *s, uint16_t v)
{
#if defined __ZZIP_SET16
return __ZZIP_SET16(s, v);
#else
/* *INDENT-OFF* */
s[0] = (unsigned char) (v); v >>= 8;
s[1] = (unsigned char) (v);
/* *INDENT-ON* */
#endif
}
/** => __zzip_get32
* This function pushes a off64_t value at the specified address
*/
void
__zzip_set64(unsigned char *s, uint64_t v)
{
/* *INDENT-OFF* */
s[0] = (unsigned char) (v); v >>= 8;
s[1] = (unsigned char) (v); v >>= 8;
s[2] = (unsigned char) (v); v >>= 8;
s[3] = (unsigned char) (v); v >>= 8;
s[4] = (unsigned char) (v); v >>= 8;
s[5] = (unsigned char) (v); v >>= 8;
s[6] = (unsigned char) (v); v >>= 8;
s[7] = (unsigned char) (v);
/* *INDENT-ON* */
}
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