diff options
Diffstat (limited to 'Build/source/libs/zziplib/zziplib-src/zzip/fetch.c')
-rw-r--r-- | Build/source/libs/zziplib/zziplib-src/zzip/fetch.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/Build/source/libs/zziplib/zziplib-src/zzip/fetch.c b/Build/source/libs/zziplib/zziplib-src/zzip/fetch.c new file mode 100644 index 00000000000..bd1958483ff --- /dev/null +++ b/Build/source/libs/zziplib/zziplib-src/zzip/fetch.c @@ -0,0 +1,126 @@ + +/* + * 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* */ +} |