wt-status: use skip_prefix() to get rid of magic string length constants

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/wt-status.c b/wt-status.c
index ca6811118cbfdf1c1cdb8a46c95156080cb202f2..62383a27f93cf4594b0669a22fa14031931badcb 100644 (file)
--- a/wt-status.c
+++ b/wt-status.c
@@ -897,15 +897,15 @@ static void wt_status_print_verbose(struct wt_status *s)
 static void wt_status_print_tracking(struct wt_status *s)
 {
        struct strbuf sb = STRBUF_INIT;
-       const char *cp, *ep;
+       const char *cp, *ep, *branch_name;
        struct branch *branch;
        char comment_line_string[3];
        int i;
 
        assert(s->branch && !s->is_initial);
-       if (!starts_with(s->branch, "refs/heads/"))
+       if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
                return;
-       branch = branch_get(s->branch + 11);
+       branch = branch_get(branch_name);
        if (!format_tracking_info(branch, &sb))
                return;
 
@@ -1154,6 +1154,7 @@ static char *read_and_strip_branch(const char *path)
 {
        struct strbuf sb = STRBUF_INIT;
        unsigned char sha1[20];
+       const char *branch_name;
 
        if (strbuf_read_file(&sb, git_path("%s", path), 0) <= 0)
                goto got_nothing;
@@ -1162,8 +1163,8 @@ static char *read_and_strip_branch(const char *path)
                strbuf_setlen(&sb, sb.len - 1);
        if (!sb.len)
                goto got_nothing;
-       if (starts_with(sb.buf, "refs/heads/"))
-               strbuf_remove(&sb,0, strlen("refs/heads/"));
+       if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
+               strbuf_remove(&sb, 0, branch_name - sb.buf);
        else if (starts_with(sb.buf, "refs/"))
                ;
        else if (!get_sha1_hex(sb.buf, sha1)) {
@@ -1194,9 +1195,8 @@ static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
        struct grab_1st_switch_cbdata *cb = cb_data;
        const char *target = NULL, *end;
 
-       if (!starts_with(message, "checkout: moving from "))
+       if (!skip_prefix(message, "checkout: moving from ", &message))
                return 0;
-       message += strlen("checkout: moving from ");
        target = strstr(message, " to ");
        if (!target)
                return 0;
@@ -1228,14 +1228,10 @@ static void wt_status_get_detached_from(struct wt_status_state *state)
             /* perhaps sha1 is a tag, try to dereference to a commit */
             ((commit = lookup_commit_reference_gently(sha1, 1)) != NULL &&
              !hashcmp(cb.nsha1, commit->object.sha1)))) {
-               int ofs;
-               if (starts_with(ref, "refs/tags/"))
-                       ofs = strlen("refs/tags/");
-               else if (starts_with(ref, "refs/remotes/"))
-                       ofs = strlen("refs/remotes/");
-               else
-                       ofs = 0;
-               state->detached_from = xstrdup(ref + ofs);
+               const char *from = ref;
+               if (!skip_prefix(from, "refs/tags/", &from))
+                       skip_prefix(from, "refs/remotes/", &from);
+               state->detached_from = xstrdup(from);
        } else
                state->detached_from =
                        xstrdup(find_unique_abbrev(cb.nsha1, DEFAULT_ABBREV));
@@ -1322,9 +1318,7 @@ void wt_status_print(struct wt_status *s)
        if (s->branch) {
                const char *on_what = _("On branch ");
                const char *branch_name = s->branch;
-               if (starts_with(branch_name, "refs/heads/"))
-                       branch_name += 11;
-               else if (!strcmp(branch_name, "HEAD")) {
+               if (!strcmp(branch_name, "HEAD")) {
                        branch_status_color = color(WT_STATUS_NOBRANCH, s);
                        if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
                                on_what = _("rebase in progress; onto ");
@@ -1339,7 +1333,8 @@ void wt_status_print(struct wt_status *s)
                                branch_name = "";
                                on_what = _("Not currently on any branch.");
                        }
-               }
+               } else
+                       skip_prefix(branch_name, "refs/heads/", &branch_name);
                status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
                status_printf_more(s, branch_status_color, "%s", on_what);
                status_printf_more(s, branch_color, "%s\n", branch_name);
@@ -1530,8 +1525,7 @@ static void wt_shortstatus_print_tracking(struct wt_status *s)
                goto conclude;
        }
 
-       if (starts_with(branch_name, "refs/heads/"))
-               branch_name += 11;
+       skip_prefix(branch_name, "refs/heads/", &branch_name);
 
        branch = branch_get(branch_name);