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authorJeff King <peff@peff.net>2014-06-18 15:47:50 -0400
committerJunio C Hamano <gitster@pobox.com>2014-06-20 10:44:45 -0700
commitae021d87911da4328157273df24779892cb51277 (patch)
treeaede96cb37d98c5675cd3f31322d4fb50f14d6e9 /http-backend.c
parent21a2d4ada52132e6b0b67f8e28aa4bcda416f7f2 (diff)
downloadgit-ae021d87911da4328157273df24779892cb51277.tar.gz
use skip_prefix to avoid magic numbers
It's a common idiom to match a prefix and then skip past it with a magic number, like: if (starts_with(foo, "bar")) foo += 3; This is easy to get wrong, since you have to count the prefix string yourself, and there's no compiler check if the string changes. We can use skip_prefix to avoid the magic numbers here. Note that some of these conversions could be much shorter. For example: if (starts_with(arg, "--foo=")) { bar = arg + 6; continue; } could become: if (skip_prefix(arg, "--foo=", &bar)) continue; However, I have left it as: if (skip_prefix(arg, "--foo=", &v)) { bar = v; continue; } to visually match nearby cases which need to actually process the string. Like: if (skip_prefix(arg, "--foo=", &v)) { bar = atoi(v); continue; } Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'http-backend.c')
-rw-r--r--http-backend.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/http-backend.c b/http-backend.c
index d2c0a625ce..57290d9bda 100644
--- a/http-backend.c
+++ b/http-backend.c
@@ -221,17 +221,19 @@ static void get_idx_file(char *name)
static int http_config(const char *var, const char *value, void *cb)
{
+ const char *p;
+
if (!strcmp(var, "http.getanyfile")) {
getanyfile = git_config_bool(var, value);
return 0;
}
- if (starts_with(var, "http.")) {
+ if (skip_prefix(var, "http.", &p)) {
int i;
for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
struct rpc_service *svc = &rpc_service[i];
- if (!strcmp(var + 5, svc->config_name)) {
+ if (!strcmp(p, svc->config_name)) {
svc->enabled = git_config_bool(var, value);
return 0;
}
@@ -244,15 +246,16 @@ static int http_config(const char *var, const char *value, void *cb)
static struct rpc_service *select_service(const char *name)
{
+ const char *svc_name;
struct rpc_service *svc = NULL;
int i;
- if (!starts_with(name, "git-"))
+ if (!skip_prefix(name, "git-", &svc_name))
forbidden("Unsupported service: '%s'", name);
for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
struct rpc_service *s = &rpc_service[i];
- if (!strcmp(s->name, name + 4)) {
+ if (!strcmp(s->name, svc_name)) {
svc = s;
break;
}