Rocco Rutte:

[apps/madmutt.git] / pager.c

diff --git a/pager.c b/pager.c
index 9d5444c..da23902 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -878,6 +878,24 @@ static int grok_ansi (unsigned char *buf, int pos, ansi_attr * a)
   return pos;
 }
 
+/* trim tail of buf so that it contains complete multibyte characters */
+static int trim_incomplete_mbyte(unsigned char *buf, size_t len) {
+  mbstate_t mbstate;
+  size_t k;
+
+  memset (&mbstate, 0, sizeof (mbstate));
+  for (; len > 0; buf += k, len -= k) {
+    k = mbrtowc (NULL, (char *) buf, len, &mbstate);
+    if (k == -2) 
+      break; 
+    else if (k == -1 || k == 0) 
+      k = 1;
+  }
+  *buf = '\0';
+
+  return len;
+}
+
 static int
 fill_buffer (FILE * f, long *last_pos, long offset, unsigned char *buf,
              unsigned char *fmt, size_t blen, int *buf_ready)
@@ -897,6 +915,11 @@ fill_buffer (FILE * f, long *last_pos, long offset, unsigned char *buf,
     b_read = (int) (*last_pos - offset);
     *buf_ready = 1;
 
+    /* incomplete mbyte characters trigger a segfault in regex processing for
+     * certain versions of glibc. Trim them if necessary. */
+    if (b_read == blen - 2)
+      b_read -= trim_incomplete_mbyte(buf, b_read);
+
     /* copy "buf" to "fmt", but without bold and underline controls */
     p = buf;
     while (*p) {