ui-ssdiff: ban strcat()

Git upstream bans strcat() with commit:

  banned.h: mark strcat() as banned
  1b11b64b815db62f93a04242e4aed5687a448748

Signed-off-by: Christian Hesse <mail@eworm.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index a3dd059..c456033 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -117,6 +117,7 @@ static char *replace_tabs(char *line)
         int n_tabs = 0;
         int i;
         char *result;
+        int result_len;
 
         if (linelen == 0) {
                 result = xmalloc(1);
@@ -128,13 +129,14 @@ static char *replace_tabs(char *line)
                 if (line[i] == '\t')
                         n_tabs += 1;
         }
-        result = xmalloc(linelen + n_tabs * 8 + 1);
+        result_len = linelen + n_tabs * 8;
+        result = xmalloc(result_len + 1);
         result[0] = '\0';
 
         for (;;) {
                 cur_buf = strchr(prev_buf, '\t');
                 if (!cur_buf) {
-                        strcat(result, prev_buf);
+                        strncat(result, prev_buf, result_len);
                         break;
                 } else {
                         strncat(result, prev_buf, cur_buf - prev_buf);