Use standrad isxdigit instead of custom helper function. (#814)

Standard function available and on most platforms uses a lookup table and not
a check with 3 ranges.

1 files changed, 2 insertions, 9 deletions

diff --git a/sds.c b/sds.c
index 6cf7584..e8b996a 100644
--- a/sds.c
+++ b/sds.c
@@ -889,13 +889,6 @@ sds sdscatrepr(sds s, const char *p, size_t len) {
     return sdscatlen(s,"\"",1);
 }
 
-/* Helper function for sdssplitargs() that returns non zero if 'c'
- * is a valid hex digit. */
-int is_hex_digit(char c) {
-    return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
-           (c >= 'A' && c <= 'F');
-}
-
 /* Helper function for sdssplitargs() that converts a hex digit into an
  * integer from 0 to 15 */
 int hex_digit_to_int(char c) {
@@ -958,8 +951,8 @@ sds *sdssplitargs(const char *line, int *argc) {
             while(!done) {
                 if (inq) {
                     if (*p == '\\' && *(p+1) == 'x' &&
-                                             is_hex_digit(*(p+2)) &&
-                                             is_hex_digit(*(p+3)))
+                                             isxdigit(*(p+2)) &&
+                                             isxdigit(*(p+3)))
                     {
                         unsigned char byte;