63dab8eed9
The upcoming geom_compress module (a read-only gzip/ulzma translation layer, similar to what geom_uzip does) will leverage parts of this.
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/*
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* Private includes and definitions for userspace use of XZ Embedded
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*
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* Author: Lasse Collin <lasse.collin@tukaani.org>
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*
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* This file has been put into the public domain.
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* You can do whatever you want with this file.
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*/
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#ifndef XZ_CONFIG_H
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#define XZ_CONFIG_H
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/* Uncomment as needed to enable BCJ filter decoders. */
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/* #define XZ_DEC_X86 */
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/* #define XZ_DEC_POWERPC */
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/* #define XZ_DEC_IA64 */
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/* #define XZ_DEC_ARM */
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/* #define XZ_DEC_ARMTHUMB */
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/* #define XZ_DEC_SPARC */
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "xz.h"
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#define kmalloc(size, flags) malloc(size)
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#define kfree(ptr) free(ptr)
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#define vmalloc(size) malloc(size)
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#define vfree(ptr) free(ptr)
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#define memeq(a, b, size) (memcmp(a, b, size) == 0)
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#define memzero(buf, size) memset(buf, 0, size)
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#ifndef min
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# define min(x, y) ((x) < (y) ? (x) : (y))
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#endif
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#define min_t(type, x, y) min(x, y)
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/*
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* Some functions have been marked with __always_inline to keep the
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* performance reasonable even when the compiler is optimizing for
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* small code size. You may be able to save a few bytes by #defining
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* __always_inline to plain inline, but don't complain if the code
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* becomes slow.
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*
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* NOTE: System headers on GNU/Linux may #define this macro already,
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* so if you want to change it, you need to #undef it first.
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*/
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#ifndef __always_inline
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# ifdef __GNUC__
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# define __always_inline \
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inline __attribute__((__always_inline__))
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# else
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# define __always_inline inline
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# endif
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#endif
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/* Inline functions to access unaligned unsigned 32-bit integers */
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#ifndef get_unaligned_le32
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static inline uint32_t get_unaligned_le32(const uint8_t *buf)
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{
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return (uint32_t)buf[0]
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| ((uint32_t)buf[1] << 8)
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| ((uint32_t)buf[2] << 16)
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| ((uint32_t)buf[3] << 24);
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}
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#endif
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#ifndef get_unaligned_be32
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static inline uint32_t get_unaligned_be32(const uint8_t *buf)
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{
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return (uint32_t)(buf[0] << 24)
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| ((uint32_t)buf[1] << 16)
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| ((uint32_t)buf[2] << 8)
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| (uint32_t)buf[3];
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}
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#endif
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#ifndef put_unaligned_le32
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static inline void put_unaligned_le32(uint32_t val, uint8_t *buf)
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{
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buf[0] = (uint8_t)val;
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buf[1] = (uint8_t)(val >> 8);
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buf[2] = (uint8_t)(val >> 16);
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buf[3] = (uint8_t)(val >> 24);
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}
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#endif
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#ifndef put_unaligned_be32
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static inline void put_unaligned_be32(uint32_t val, uint8_t *buf)
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{
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buf[0] = (uint8_t)(val >> 24);
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buf[1] = (uint8_t)(val >> 16);
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buf[2] = (uint8_t)(val >> 8);
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buf[3] = (uint8_t)val;
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}
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#endif
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/*
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* Use get_unaligned_le32() also for aligned access for simplicity. On
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* little endian systems, #define get_le32(ptr) (*(const uint32_t *)(ptr))
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* could save a few bytes in code size.
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*/
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#ifndef get_le32
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# define get_le32 get_unaligned_le32
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#endif
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#endif
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