lib/pnd_pathiter.h

   1
   2 #ifndef h_pnd_pathiter_h
   3 #define h_png_pathiter_h
   4
   5 // man don'y you wish it was python, perl or c++ right about now?
   6 // perl: foreach i ( split ( ':', path ) ) would be sauce right now
   7
   8 // this really should be replaced by a function pair .. one to
   9 // start a new search and one to go to next, bailing when done. Maybe
  10 // a state struct. Like we have time. OR perhaps just a single
  11 // func with a callback. Whatever.
  12
  13 #define SEARCHPATH_PRE                            \
  14   char *end, *colon;                              \
  15   char *head = searchpath;                        \
  16   char buffer [ FILENAME_MAX ];                   \
  17                                                   \
  18   while ( 1 ) {                                   \
  19     colon = strchr ( head, ':' );                 \
  20     end = strchr ( head, '\0' );                  \
  21                                                   \
  22     if ( colon && colon < end ) {                 \
  23       memset ( buffer, '\0', FILENAME_MAX );      \
  24       strncpy ( buffer, head, colon - head );     \
  25     } else {                                      \
  26       strncpy ( buffer, head, FILENAME_MAX - 1 ); \
  27     }                                             \
  28                                                   \
  29     //printf ( "Path to search: '%s'\n", buffer );
  30
  31 #define SEARCHPATH_POST                           \
  32     /* next search path */                        \
  33     if ( colon && colon < end ) {                 \
  34       head = colon + 1;                           \
  35     } else {                                      \
  36       break; /* done! */                          \
  37     }                                             \
  38                                                   \
  39   } // while
  40
  41 #endif