146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/* Utility functions definitions */
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#ifndef SYSTEM_H_
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#define SYSTEM_H_
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#include <stddef.h>
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#include <stdio.h>
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#include <limits.h>
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#include <stdint.h>
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#include <string.h>
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#ifdef __cplusplus
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#define SYSTEM_H_BEGIN_ extern "C" {
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#define SYSTEM_H_END_ }
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#else
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#define SYSTEM_H_BEGIN_
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#define SYSTEM_H_END_
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#endif
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SYSTEM_H_BEGIN_
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#ifndef __MINGW32__
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#define DGEN_BASEDIR ".dgen"
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#define DGEN_RC "dgenrc"
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#define DGEN_AUTORC "dgenrc.auto"
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#define DGEN_DIRSEP "/"
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#else
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#define DGEN_BASEDIR "DGen"
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#define DGEN_RC "dgen.cfg"
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#define DGEN_AUTORC "dgen_auto.cfg"
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#define DGEN_DIRSEP "\\/"
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#endif
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#define elemof(a) (sizeof(a) / sizeof((a)[0]))
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#define containerof(p, s, m) (s *)((uintptr_t)(p) - offsetof(s, m))
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#define BITS_TO_BYTES(v) ((((v) + 7u) & ~7u) >> 3)
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#define DGEN_READ 0x1
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#define DGEN_WRITE 0x2
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#define DGEN_APPEND 0x4
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#define DGEN_CURRENT 0x8
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#define DGEN_TEXT 0x10
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#define dgen_fopen_rc(mode) dgen_fopen(NULL, DGEN_RC, ((mode) | DGEN_TEXT))
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#define dgen_fopen_autorc(mode) \
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dgen_fopen(NULL, DGEN_AUTORC, ((mode) | DGEN_TEXT))
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extern FILE *dgen_fopen(const char *relative, const char *file,
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unsigned int mode);
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extern FILE *dgen_freopen(const char *relative, const char *file,
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unsigned int mode, FILE *f);
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extern const char *dgen_basename(const char *path);
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extern char *dgen_dir(char *buf, size_t *size, const char *sub);
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extern char *dgen_userdir(char *buf, size_t *size);
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#define le2h16(v) h2le16(v)
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static inline uint16_t h2le16(uint16_t v)
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{
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#ifdef WORDS_BIGENDIAN
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return ((v >> 8) | (v << 8));
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#else
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return v;
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#endif
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}
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#define be2h16(v) h2be16(v)
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static inline uint16_t h2be16(uint16_t v)
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{
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#ifdef WORDS_BIGENDIAN
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return v;
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#else
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return ((v >> 8) | (v << 8));
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#endif
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}
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#define le2h32(v) h2le32(v)
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static inline uint32_t h2le32(uint32_t v)
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{
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#ifdef WORDS_BIGENDIAN
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return (((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >> 8) |
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((v & 0x0000ff00) << 8) | ((v & 0x000000ff) << 24));
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#else
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return v;
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#endif
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}
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#define be2h32(v) h2be32(v)
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static inline uint32_t h2be32(uint32_t v)
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{
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#ifdef WORDS_BIGENDIAN
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return v;
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#else
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return (((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >> 8) |
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((v & 0x0000ff00) << 8) | ((v & 0x000000ff) << 24));
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#endif
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}
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typedef uint8_t uint24_t[3];
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static inline uint24_t *u24cpy(uint24_t *dst, const uint24_t *src)
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{
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/* memcpy() is sometimes faster. */
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#ifdef U24CPY_MEMCPY
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memcpy(*dst, *src, sizeof(*dst));
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#else
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(*dst)[0] = (*src)[0];
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(*dst)[1] = (*src)[1];
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(*dst)[2] = (*src)[2];
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#endif
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return dst;
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}
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extern uint8_t *load(void **context,
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size_t *file_size, FILE *file, size_t max_size);
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extern void load_finish(void **context);
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extern void unload(uint8_t *data);
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extern char **complete_path(const char *prefix, size_t len,
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const char *relative);
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extern void complete_path_free(char **cp);
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static inline size_t strcommon(const char *s1, const char *s2)
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{
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size_t i;
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for (i = 0; ((s1[i] != '\0') && (s2[i] != '\0')); ++i)
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if (s1[i] != s2[i])
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break;
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return i;
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}
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#define BACKSLASHIFY_NOQUOTES 0x0001
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extern char *backslashify(const uint8_t *src, size_t size, unsigned int flags,
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size_t *pos);
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extern size_t utf8u32(uint32_t *u32, const uint8_t *u8);
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extern size_t utf32u8(uint8_t *u8, uint32_t u32);
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extern int prefix_casematch(const char *str, const char *argv[]);
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extern size_t prefix_getuint(const char *str, unsigned int *num);
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SYSTEM_H_END_
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#endif /* SYSTEM_H_ */
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