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--- mp3gain.c.old	2004-12-23 15:47:04.000000000 -0500
+++ mp3gain.c	2006-03-13 22:15:28.000000000 -0500
@@ -46,7 +46,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <math.h>
+#include <math.h>
+#include <ctype.h>
 #include "apetag.h"
 
 #ifndef WIN32
@@ -1181,10 +1182,11 @@
 static
 void errUsage(char *progname) {
 	showVersion(progname);
-	fprintf(stderr,"copyright(c) 2001-2004 by Glen Sawyer\n");
+	fprintf(stderr,"copyright(c) 2001-2004 by Glen Sawyer\n");
+        fprintf(stderr,"portions copyright(c) 2006 by Stephan Sokolow\n");
 	fprintf(stderr,"uses mpglib, which can be found at http://www.mpg123.de\n");
 	fprintf(stderr,"Usage: %s [options] <infile> [<infile 2> ...]\n",progname);
-	fprintf(stderr,"  --use %c? or %ch for a full list of options\n",SWITCH_CHAR,SWITCH_CHAR);
+	fprintf(stderr,"  --use %c?, %ch, or --help for a full list of options\n",SWITCH_CHAR,SWITCH_CHAR);
     fclose(stdout);
     fclose(stderr);
 	exit(1);
@@ -1195,7 +1197,8 @@
 static
 void fullUsage(char *progname) {
 		showVersion(progname);
-		fprintf(stderr,"copyright(c) 2001-2004 by Glen Sawyer\n");
+		fprintf(stderr,"copyright(c) 2001-2004 by Glen Sawyer\n");
+                fprintf(stderr,"portions copyright(c) 2006 by Stephan Sokolow\n");
 		fprintf(stderr,"uses mpglib, which can be found at http://www.mpg123.de\n");
 		fprintf(stderr,"Usage: %s [options] <infile> [<infile 2> ...]\n",progname);
 		fprintf(stderr,"options:\n");
@@ -1227,9 +1230,14 @@
 		fprintf(stderr,"\t%cs d - delete stored tag info (no other processing)\n",SWITCH_CHAR);
 		fprintf(stderr,"\t%cs s - skip (ignore) stored tag info (do not read or write tags)\n",SWITCH_CHAR);
 		fprintf(stderr,"\t%cs r - force re-calculation (do not read tag info)\n",SWITCH_CHAR);
-		fprintf(stderr,"\t%cu - undo changes made by mp3gain (based on stored tag info)\n",SWITCH_CHAR);
-        fprintf(stderr,"\t%cw - \"wrap\" gain change if gain+change > 255 or gain+change < 0\n",SWITCH_CHAR);
-        fprintf(stderr,"\t      (use \"%c? wrap\" switch for a complete explanation)\n",SWITCH_CHAR);
+		fprintf(stderr,"\t%cu - undo changes made by mp3gain (based on stored tag info)\n",SWITCH_CHAR);
+                fprintf(stderr,"\t%cw - \"wrap\" gain change if gain+change > 255 or gain+change < 0\n",SWITCH_CHAR);
+                fprintf(stderr,"\t      (use \"%c? wrap\" switch for a complete explanation)\n",SWITCH_CHAR);
+                fprintf(stderr,"\t-- - force everything beyond this point to be treated as arguments.\n");
+                fprintf(stderr,"long options:\n");
+                fprintf(stderr,"\t--auto - same as %cr %ck %cp\n", SWITCH_CHAR, SWITCH_CHAR, SWITCH_CHAR);
+                fprintf(stderr,"\t--help - show this message\n");
+                fprintf(stderr,"\t--recursive - TODO\n");
 		fprintf(stderr,"If you specify %cr and %ca, only the second one will work\n",SWITCH_CHAR,SWITCH_CHAR);
 		fprintf(stderr,"If you do not specify %cc, the program will stop and ask before\n     applying gain change to a file that might clip\n",SWITCH_CHAR);
         fclose(stdout);
@@ -1245,7 +1253,20 @@
   fprintf(stderr, "haveTrackPeak       %d  trackPeak %f\n",info->haveTrackPeak, info->trackPeak);
   fprintf(stderr, "haveMinMaxGain      %d  min %d  max %d\n",info->haveMinMaxGain, info->minGain, info->maxGain);
 }
-
+
+void showHelp(int argc, char **argv, int i) {
+    if ((argv[i][2] == 'w')||(argv[i][2] == 'W')) {
+        wrapExplanation();
+    } else {
+        if (i+1 < argc) {
+            if ((argv[i+1][0] == 'w')||(argv[i+1][0] =='W'))
+                wrapExplanation();
+        } else {
+            fullUsage(argv[0]);
+        }
+    }
+    fullUsage(argv[0]);
+}
 
 #ifdef WIN32
 int __cdecl main(int argc, char **argv) { /*make sure this one is standard C declaration*/
@@ -1282,7 +1303,7 @@
 	int fileStart;
 	int numFiles;
 	int databaseFormat = 0;
-	int i;
+	int i, j;
 	int *fileok;
 	int goAhead;
 	int directGain = 0;
@@ -1303,7 +1324,10 @@
 	double curAlbumPeak = 0;
 	unsigned char curAlbumMinGain = 0;
 	unsigned char curAlbumMaxGain = 0;
-	char chtmp;
+	char chtmp;
+        
+        /* Variables used in the improved option parser */
+        int parseOptions = !0;
 
     gSuccess = 1;
 
@@ -1316,28 +1340,28 @@
 	fileStart = 1;
 	numFiles = 0;
 
-	for (i = 1; i < argc; i++) {
-#ifdef WIN32
-		if ((argv[i][0] == '/')||((argv[i][0] == '-') && (strlen(argv[i])==2))) { /* don't need to force single-character command parameters */
-#else
-		if (((argv[i][0] == '/')||(argv[i][0] == '-'))&&
-		    (strlen(argv[i])==2)) {
-#endif
-			fileStart++;
-			switch(argv[i][1]) {
-				case 'a':
-				case 'A':
+	for (i = 1; i < argc; i++) {
+            /* 
+            TODO: Implement support for:
+                - consider including the glob-parsing support from vorbisgain's so-called recursive support.
+            */
+                if ((parseOptions) && (argv[i][0] == SWITCH_CHAR) && (strlen(argv[i]) >= 2) ) {
+			fileStart++;
+                        
+                        if (!strcmp(argv[i],"--")) { /* Support for the standard "--" option to force the end of the option parsing. */
+                            parseOptions = 0;
+                            continue;
+                        } else if (argv[i][1] != '-') { /* Ensure that this isn't a long option. */
+                            for (j = 1; j < strlen(argv[i]); j++) {
+                                switch(tolower(argv[i][j])) {
+                                    case 'a':
 					applyTrack = 0;
 					applyAlbum = !0;
 					break;
-
-                case 'c':
-				case 'C':
+                                    case 'c':
 					ignoreClipWarning = !0;
 					break;
-
-				case 'd':
-				case 'D':
+                                    case 'd':
 					if (argv[i][2] != '\0') {
 						dBGainMod = atof(argv[i]+2);
 					}
@@ -1352,14 +1376,10 @@
 						}
 					}
 					break;
-
-				case 'f':
-				case 'F':
+                                    case 'f':
 					Reckless = 1;
 					break;
-
-				case 'g':
-				case 'G':
+                                    case 'g':
 					directGain = !0;
 					directSingleChannelGain = 0;
 					if (argv[i][2] != '\0') {
@@ -1376,32 +1396,14 @@
 						}
 					}
 					break;
-
-				case 'h':
-				case 'H':
-				case '?':
-					if ((argv[i][2] == 'w')||(argv[i][2] == 'W')) {
-						wrapExplanation();
-					}
-					else {
-						if (i+1 < argc) {
-							if ((argv[i+1][0] == 'w')||(argv[i+1][0] =='W'))
-                                wrapExplanation();
-						}
-						else {
-							fullUsage(argv[0]);
-						}
-					}
-					fullUsage(argv[0]);
-					break;
-
-                case 'k':
-                case 'K':
-                    autoClip = !0;
-                    break;
-
-				case 'l':
-				case 'L':
+                                    case 'h':
+                                    case '?':
+                                        showHelp(argc, argv, i);
+                                        break;
+                                    case 'k':
+                                        autoClip = !0;
+                                        break;
+                                    case 'l':
 					directSingleChannelGain = !0;
 					directGain = 0;
 					if (argv[i][2] != '\0') {
@@ -1429,9 +1431,7 @@
 						}
 					}
 					break;
-
-				case 'm':
-				case 'M':
+                                    case 'm':
 					if (argv[i][2] != '\0') {
 						mp3GainMod = atoi(argv[i]+2);
 					}
@@ -1446,30 +1446,20 @@
 						}
 					}
 					break;
-
-				case 'o':
-				case 'O':
+                                    case 'o':
 					databaseFormat = !0;
 					break;
-
-				case 'p':
-				case 'P':
+                                    case 'p':
 					saveTime = !0;
 					break;
-
-				case 'q':
-				case 'Q':
+                                    case 'q':
 					QuietMode = !0;
 					break;
-
-				case 'r':
-				case 'R':
+                                    case 'r':
 					applyTrack = !0;
 					applyAlbum = 0;
 					break;
-
-                case 's':
-                case 'S':
+                                    case 's':
 					chtmp = 0;
 					if (argv[i][2] == '\0') {
 						if (i+1 < argc) {
@@ -1482,59 +1472,56 @@
 					} else {
 						chtmp = argv[i][2];
 					}
-		            switch (chtmp) {
-                        case 'c':
-                        case 'C':
-                            checkTagOnly = !0;
-                            break;
-                        case 'd':
-                        case 'D':
-                            deleteTag = !0;
-                            break;
-                        case 's':
-                        case 'S':
-                            skipTag = !0;
-                            break;
-                        case 'r':
-                        case 'R':
-                            forceRecalculateTag = !0;
-                            break;
-						default:
-							errUsage(argv[0]);
-                    }
-
-                    break;
-
-				case 't':
-				case 'T':
+                                        switch (tolower(chtmp)) {
+                                            case 'c':
+                                                checkTagOnly = !0;
+                                                break;
+                                            case 'd':
+                                                deleteTag = !0;
+                                                break;
+                                            case 's':
+                                                skipTag = !0;
+                                                break;
+                                            case 'r':
+                                                forceRecalculateTag = !0;
+                                                break;
+                                            default:
+                                                errUsage(argv[0]);
+                                        }
+                                        break;
+                                    case 't':
 					UsingTemp = !0;
 					break;
-
-				case 'u':
-				case 'U':
+                                    case 'u':
 					undoChanges = !0;
 					break;
-
-				case 'v':
-				case 'V':
+                                    case 'v':
 					showVersion(argv[0]);
-                    fclose(stdout);
-                    fclose(stderr);
+                                        fclose(stdout);
+                                        fclose(stderr);
 					exit(0);
-					
-				case 'w':
-				case 'W':
+                                    case 'w':
 					wrapGain = !0;
 					break;
-
-				case 'x':
-				case 'X':
+                                    case 'x':
 					maxAmpOnly = !0;
 					break;
-
-				default:
-					fprintf(stderr,"I don't recognize option %s\n",argv[i]);
-			}
+                                    default:
+					fprintf(stderr,"I don't recognize option %s\n",argv[i]);
+                                }
+                            }
+			} else if (!strncmp(argv[i],"--",2)) { /* This is a long option and must be parsed as such */
+                            if (!strcasecmp(argv[i],"--auto")) {
+                                autoClip = !0;   /* -k */
+                                saveTime = !0;   /* -p */
+                                applyTrack = !0; /* -r */
+                                applyAlbum = 0;  /* -r */
+                            } else if (!strcasecmp(argv[i],"--help")) {
+                                showHelp(argc, argv, i);
+                            } else if (!strcasecmp(argv[i],"--recursive")) {
+                                fprintf(stderr,"Sorry, --recursive has not been implemented yet.\n\t However, the following command seems to be equivalent:\n\t`find /path/to/mp3s -iname \"*.mp3\" -exec mp3gain -r {} \\;`\n\tThe use of --auto in place of -r is recommended.\n");
+                            }
+                        }
 		}
 	}
 	/* now stored in tagInfo---  maxsample = malloc(sizeof(Float_t) * argc); */