470 static char const kStampName[] = "STAMP";
478 /** Hash the data to create the stamp. */
496 /** Check if the stamp matches the stamp in the cache directory. */
498     char* stamp = cat3(dir, "/", kStampName);  in stamp_check()  local
504     if (stamp == NULL)  in stamp_check()
506     if (!UTIL_isRegularFile(stamp)) {  in stamp_check()
507         fprintf(stderr, "stamp does not exist: recreating the data cache\n");  in stamp_check()
511     stampfile = fopen(stamp, "rb");  in stamp_check()
513         fprintf(stderr, "could not open stamp: recreating the data cache\n");  in stamp_check()
519         fprintf(stderr, "invalid stamp: recreating the data cache\n");  in stamp_check()
525         fprintf(stderr, "stamp matches: reusing the cached data\n");  in stamp_check()
527         fprintf(stderr, "stamp does not match: recreating the data cache\n");  in stamp_check()
530     free(stamp);  in stamp_check()
536 /** On success write a new stamp, on failure delete the old stamp. */
539     char* stamp = cat3(dir, "/", kStampName);  in stamp_write()  local
543     if (stamp == NULL)  in stamp_write()
554     stampfile = fopen(stamp, "wb");  in stamp_write()
564         unlink(stamp);  in stamp_write()
565     free(stamp);  in stamp_write()
591     /* If the stamp matches then we are good to go.  in data_init()
593      * After this point, we MUST call stamp_write() to update the STAMP,  in data_init()