src/include/str_utils.h

   1 #ifndef STR_UTILS_H
   2 #define STR_UTILS_H
   3
   4 #include "gliv.h"
   5
   6 /*
   7  * The magic to find a '\0' in a long int is taken from the glibc.
   8  * See sysdeps/generic/strlen.c in the glibc sources to have the
   9  * explanation.
  10  * Actually it also finds 0x80, that's why we double check when
  11  * HAS_ZERO() finds something.
  12  */
  13 #define INIT_MAGIC()                                                \
  14     do {                                                            \
  15         himagic = 0x80808080L;                                      \
  16         lomagic = 0x01010101L;                                      \
  17                                                                     \
  18         if (sizeof(gulong) > 4) {                                   \
  19             /* 64-bit */                                            \
  20             himagic = ((himagic << 16) << 16) | himagic;            \
  21             lomagic = ((lomagic << 16) << 16) | lomagic;            \
  22             magic_bits = ((0x7efefefeL << 16) << 16) | 0xfefefeffL; \
  23         } else                                                      \
  24             magic_bits = 0x7efefeffL;                               \
  25     } while (0)
  26
  27 #define HAS_ZERO(longint) ((((longint) + magic_bits) ^ ~longint) & ~magic_bits)
  28
  29 const gchar *filename_to_utf8(const gchar * str);
  30 gchar *clean_filename(const gchar * filename);
  31
  32 #endif