config: provide a function to reverse-lookup mapped cvars
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diff --git a/src/config.c b/src/config.c
index 1400b95..77cf573 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1194,6 +1194,26 @@ fail_parse:
return -1;
}
+int git_config_lookup_map_enum(git_cvar_t *type_out, const char **str_out,
+ const git_cvar_map *maps, size_t map_n, int enum_val)
+{
+ size_t i;
+
+ for (i = 0; i < map_n; i++) {
+ const git_cvar_map *m = &maps[i];
+
+ if (m->map_value != enum_val)
+ continue;
+
+ *type_out = m->cvar_type;
+ *str_out = m->str_match;
+ return 0;
+ }
+
+ giterr_set(GITERR_CONFIG, "invalid enum value");
+ return GIT_ENOTFOUND;
+}
+
int git_config_parse_bool(int *out, const char *value)
{
if (git__parse_bool(out, value) == 0)
diff --git a/src/config.h b/src/config.h
index 691868b..f257cc9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -82,4 +82,10 @@ extern int git_config__get_int_force(
extern int git_config__cvar(
int *out, git_config *config, git_cvar_cached cvar);
+/**
+ * The opposite of git_config_lookup_map_value, we take an enum value
+ * and map it to the string or bool value on the config.
+ */
+int git_config_lookup_map_enum(git_cvar_t *type_out, const char **str_out,
+ const git_cvar_map *maps, size_t map_n, int enum_val);
#endif