[PATCH 1/3] parse_config_key: use skip_prefix instead of starts_with

[Jeff King]

This saves us having to repeatedly add in "section_len" (and
also avoids walking over the first part of the string
multiple times for a strlen() and strrchr()).

Signed-off-by: Jeff King <p...@peff.net>
---
 config.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/config.c b/config.c
index c6b874a7b..1b08a75a7 100644
--- a/config.c
+++ b/config.c
@@ -2536,11 +2536,10 @@ int parse_config_key(const char *var,
                     const char **subsection, int *subsection_len,
                     const char **key)
 {
-       int section_len = strlen(section);
        const char *dot;
 
        /* Does it start with "section." ? */
-       if (!starts_with(var, section) || var[section_len] != '.')
+       if (!skip_prefix(var, section, &var) || *var != '.')
                return -1;
 
        /*
@@ -2552,12 +2551,12 @@ int parse_config_key(const char *var,
        *key = dot + 1;
 
        /* Did we have a subsection at all? */
-       if (dot == var + section_len) {
+       if (dot == var) {
                *subsection = NULL;
                *subsection_len = 0;
        }
        else {
-               *subsection = var + section_len + 1;
+               *subsection = var + 1;
                *subsection_len = dot - *subsection;
        }
 
-- 
2.12.0.616.g5f622f3b1