setup_revisions(): handle -n<n> and -<n> internally.

This moves the handling of max-count shorthand from the internal
implementation of "git log" to setup_revisions() so other users
of setup_revisions() can use it.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git.c

@@ -264,20 +264,7 @@ static int cmd_log(int argc, char **argv, char **envp)
 	argc = setup_revisions(argc, argv, &rev, "HEAD");
 	while (1 < argc) {
 		char *arg = argv[1];
-		/* accept -<digit>, like traditilnal "head" */
-		if ((*arg == '-') && isdigit(arg[1])) {
-			rev.max_count = atoi(arg + 1);
-		}
-		else if (!strcmp(arg, "-n")) {
-			if (argc < 2)
-				die("-n requires an argument");
-			rev.max_count = atoi(argv[2]);
-			argc--; argv++;
-		}
-		else if (!strncmp(arg,"-n",2)) {
-			rev.max_count = atoi(arg + 2);
-		}
-		else if (!strncmp(arg, "--pretty", 8)) {
+		if (!strncmp(arg, "--pretty", 8)) {
 			commit_format = get_commit_format(arg + 8);
 			if (commit_format == CMIT_FMT_ONELINE)
 				commit_prefix = "";

revision.c

@@ -482,6 +482,21 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
 				revs->max_count = atoi(arg + 12);
 				continue;
 			}
+			/* accept -<digit>, like traditilnal "head" */
+			if ((*arg == '-') && isdigit(arg[1])) {
+				revs->max_count = atoi(arg + 1);
+				continue;
+			}
+			if (!strcmp(arg, "-n")) {
+				if (argc <= i + 1)
+					die("-n requires an argument");
+				revs->max_count = atoi(argv[++i]);
+				continue;
+			}
+			if (!strncmp(arg,"-n",2)) {
+				revs->max_count = atoi(arg + 2);
+				continue;
+			}
 			if (!strncmp(arg, "--max-age=", 10)) {
 				revs->max_age = atoi(arg + 10);
 				revs->limited = 1;