config: use utf8_bom[] from utf.[ch] in git_parse_source()

Because the function reads one character at the time, unfortunately
we cannot use the easier skip_utf8_bom() helper, but at least we do
not have to duplicate the constant string this way.

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

diff --git a/config.c b/config.c
index 752e2e227f56edfb7b2ad168798c110c14a2c5e8..9618aa443dee975c639a31a4ae2b3d55eed06d6e 100644 (file)
--- a/config.c
+++ b/config.c
@@ -12,6 +12,7 @@
 #include "quote.h"
 #include "hashmap.h"
 #include "string-list.h"
+#include "utf8.h"
 
 struct config_source {
        struct config_source *prev;
@@ -412,8 +413,7 @@ static int git_parse_source(config_fn_t fn, void *data)
        struct strbuf *var = &cf->var;
 
        /* U+FEFF Byte Order Mark in UTF8 */
-       static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
-       const unsigned char *bomptr = utf8_bom;
+       const char *bomptr = utf8_bom;
 
        for (;;) {
                int c = get_next_char();
@@ -421,7 +421,7 @@ static int git_parse_source(config_fn_t fn, void *data)
                        /* We are at the file beginning; skip UTF8-encoded BOM
                         * if present. Sane editors won't put this in on their
                         * own, but e.g. Windows Notepad will do it happily. */
-                       if ((unsigned char) c == *bomptr) {
+                       if (c == (*bomptr & 0377)) {
                                bomptr++;
                                continue;
                        } else {