diff --check: do not get confused by new blank lines in the middle

diff --git a/ws.c b/ws.c
index 522f646ed7f492a91ea288d03aabfcf5db69c196..7a7ff130a34942506e6068105ac5946c9404bf18 100644 (file)
--- a/ws.c
+++ b/ws.c
@@ -117,9 +117,9 @@ char *whitespace_error_string(unsigned ws)
 }
 
 /* If stream is non-NULL, emits the line after checking. */
-unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
-                            FILE *stream, const char *set,
-                            const char *reset, const char *ws)
+static unsigned ws_check_emit_1(const char *line, int len, unsigned ws_rule,
+                               FILE *stream, const char *set,
+                               const char *reset, const char *ws)
 {
        unsigned result = 0;
        int written = 0;
@@ -213,6 +213,33 @@ unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
        return result;
 }
 
+void ws_check_emit(const char *line, int len, unsigned ws_rule,
+                  FILE *stream, const char *set,
+                  const char *reset, const char *ws)
+{
+       (void)ws_check_emit_1(line, len, ws_rule, stream, set, reset, ws);
+}
+
+unsigned ws_check(const char *line, int len, unsigned ws_rule)
+{
+       return ws_check_emit_1(line, len, ws_rule, NULL, NULL, NULL, NULL);
+}
+
+int ws_blank_line(const char *line, int len, unsigned ws_rule)
+{
+       /*
+        * We _might_ want to treat CR differently from other
+        * whitespace characters when ws_rule has WS_CR_AT_EOL, but
+        * for now we just use this stupid definition.
+        */
+       while (len-- > 0) {
+               if (!isspace(*line))
+                       return 0;
+               line++;
+       }
+       return 1;
+}
+
 /* Copy the line to the buffer while fixing whitespaces */
 int ws_fix_copy(char *dst, const char *src, int len, unsigned ws_rule, int *error_count)
 {
@@ -234,7 +261,7 @@ int ws_fix_copy(char *dst, const char *src, int len, unsigned ws_rule, int *erro
         * Strip trailing whitespace
         */
        if ((ws_rule & WS_TRAILING_SPACE) &&
-           (2 < len && isspace(src[len-2]))) {
+           (2 <= len && isspace(src[len-2]))) {
                if (src[len - 1] == '\n') {
                        add_nl_to_tail = 1;
                        len--;