[hackers] [slock][PATCH] Improve option parsing routine

[Klemens Nanni]

This reduces the amount of strcmp() calls and comparisons in general to
a minimum.
---
 slock.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/slock.c b/slock.c
index 283b04e..e9b050a 100644
--- a/slock.c
+++ b/slock.c
@@ -298,15 +298,14 @@ main(int argc, char *argv[]) {
        Display *dpy;
        int s, nlocks, nscreens;
 
-       if (argc > 1 && !strncmp("-", argv[1], 1)) {
-               if ((argc == 2 && !strcmp("-v", argv[1])) ||
-                   (argc == 3 && !strcmp("-v", argv[1]) && !strcmp("--", 
argv[2]))) {
+       if (argv[1] && argv[1][0] == '-') {
+               if (argv[1][1] == 'v' && argv[1][2] == '\0' &&
+                   (argc == 2 || (argc == 3 && !strcmp(argv[2], "--")))) {
                        fputs("slock-"VERSION"\n", stderr);
                        return 0;
-               } else if (!strcmp("--", argv[1])) {
-                       --argc;
-                       ++argv;
-               } else
+               } else if (argv[1][1] == '-' && argv[1][2] == '\0')
+                       --argc, ++argv;
+               else
                        die("usage: slock [-v] [cmd [arg ...]]\n");
        }
 
-- 
2.8.3