git_config_bool_or_int()

This new function can be used by config parsers to tell if a variable
is simply set, set to 1, or set to "true".

Signed-off-by: Junio C Hamano <gitster@pobox.com>

cache.h

@@ -692,6 +692,7 @@ extern int git_parse_long(const char *, long *);
 extern int git_parse_ulong(const char *, unsigned long *);
 extern int git_config_int(const char *, const char *);
 extern unsigned long git_config_ulong(const char *, const char *);
+extern int git_config_bool_or_int(const char *, const char *, int *);
 extern int git_config_bool(const char *, const char *);
 extern int git_config_string(const char **, const char *, const char *);
 extern int git_config_set(const char *, const char *);

config.c

@@ -303,8 +303,9 @@ unsigned long git_config_ulong(const char *name, const char *value)
 	return ret;
 }
 
-int git_config_bool(const char *name, const char *value)
+int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 {
+	*is_bool = 1;
 	if (!value)
 		return 1;
 	if (!*value)
@@ -313,9 +314,16 @@ int git_config_bool(const char *name, const char *value)
 		return 1;
 	if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
 		return 0;
+	*is_bool = 0;
 	return git_config_int(name, value) != 0;
 }
 
+int git_config_bool(const char *name, const char *value)
+{
+	int discard;
+	return git_config_bool_or_int(name, value, &discard);
+}
+
 int git_config_string(const char **dest, const char *var, const char *value)
 {
 	if (!value)