include/iso9660.h

   1 /*
   2  * No copyright is claimed.  This code is in the public domain; do with
   3  * it what you wish.
   4  */
   5 #ifndef UTIL_LINUX_ISO_H
   6 #define UTIL_LINUX_ISO_H
   7
   8 #include <stdbool.h>
   9 #include <stdint.h>
  10
  11 #include "c.h"
  12
  13 static inline uint16_t isonum_721(const unsigned char *p)
  14 {
  15         return ((p[0] & 0xff)
  16                 | ((p[1] & 0xff) << 8));
  17 }
  18
  19 static inline uint16_t isonum_722(const unsigned char *p)
  20 {
  21         return ((p[1] & 0xff)
  22                 | ((p[0] & 0xff) << 8));
  23 }
  24
  25 static inline uint16_t isonum_723(const unsigned char *p, bool check_match)
  26 {
  27         uint16_t le = isonum_721(p);
  28         uint16_t be = isonum_722(p + 2);
  29
  30         if (check_match && le != be)
  31                 /* translation is useless */
  32                 warnx("723error: le=%d be=%d", le, be);
  33         return (le);
  34 }
  35
  36 static inline uint32_t isonum_731(const unsigned char *p)
  37 {
  38         return ((p[0] & 0xff)
  39                 | ((p[1] & 0xff) << 8)
  40                 | ((p[2] & 0xff) << 16)
  41                 | (((uint32_t) p[3] & 0xff) << 24));
  42 }
  43
  44 static inline uint32_t isonum_732(const unsigned char *p)
  45 {
  46         return ((p[3] & 0xff)
  47                 | ((p[2] & 0xff) << 8)
  48                 | ((p[1] & 0xff) << 16)
  49                 | (((uint32_t) p[0] & 0xff) << 24));
  50 }
  51
  52 static inline uint32_t isonum_733(const unsigned char *p, bool check_match)
  53 {
  54         uint32_t le = isonum_731(p);
  55         uint32_t be = isonum_732(p + 4);
  56
  57         if (check_match && le != be)
  58                 /* translation is useless */
  59                 warnx("733error: le=%d be=%d", le, be);
  60         return(le);
  61 }
  62
  63 #endif