+Filename filename_from_str(const char *str)
+{
+ Filename ret;
+ Str255 tmp;
+
+ /* XXX This fails for filenames over 255 characters long. */
+ c2pstrcpy(tmp, str);
+ FSMakeFSSpec(0, 0, tmp, &ret.fss);
+ return ret;
+}
+
+/*
+ * Convert a filename to a string for display purposes.
+ * See pp 2-44--2-46 of IM:Files
+ *
+ * XXX static storage considered harmful
+ */
+const char *filename_to_str(const Filename *fn)
+{
+ CInfoPBRec pb;
+ Str255 dirname;
+ OSErr err;
+ static char *path = NULL;
+ char *newpath;
+
+ if (path != NULL) sfree(path);
+ path = smalloc(fn->fss.name[0]);
+ p2cstrcpy(path, fn->fss.name);
+ pb.dirInfo.ioNamePtr = dirname;
+ pb.dirInfo.ioVRefNum = fn->fss.vRefNum;
+ pb.dirInfo.ioDrParID = fn->fss.parID;
+ pb.dirInfo.ioFDirIndex = -1;
+ do {
+ pb.dirInfo.ioDrDirID = pb.dirInfo.ioDrParID;
+ err = PBGetCatInfoSync(&pb);
+
+ /* XXX Assume not A/UX */
+ newpath = smalloc(strlen(path) + dirname[0] + 2);
+ p2cstrcpy(newpath, dirname);
+ strcat(newpath, ":");
+ strcat(newpath, path);
+ sfree(path);
+ path = newpath;
+ } while (pb.dirInfo.ioDrDirID != fsRtDirID);
+ return path;
+}
+
+int filename_equal(Filename f1, Filename f2)
+{
+
+ return f1.fss.vRefNum == f2.fss.vRefNum &&
+ f1.fss.parID == f2.fss.parID &&
+ f1.fss.name[0] == f2.fss.name[0] &&
+ memcmp(f1.fss.name + 1, f2.fss.name + 1, f1.fss.name[0]) == 0;
+}
+
+int filename_is_null(Filename fn)
+{
+
+ return fn.fss.vRefNum == 0 && fn.fss.parID == 0 && fn.fss.name[0] == 0;
+}
+
+FILE *f_open(Filename fn, char const *mode)
+{
+ short savevol;
+ long savedir;
+ char tmp[256];
+ FILE *ret;
+
+ HGetVol(NULL, &savevol, &savedir);
+ if (HSetVol(NULL, fn.fss.vRefNum, fn.fss.parID) == noErr) {
+ p2cstrcpy(tmp, fn.fss.name);
+ ret = fopen(tmp, mode);
+ } else
+ ret = NULL;
+ HSetVol(NULL, savevol, savedir);
+ return ret;
+}
+