* term.c (tty_write_glyphs): Use size_t; this avoids overflow warning.

2 files changed, 6 insertions, 5 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 89946731630..30a45692ea6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,7 @@
 2011-04-01  Paul Eggert  <eggert@cs.ucla.edu>
 
+        * term.c (tty_write_glyphs): Use size_t; this avoids overflow warning.
+
         * coding.c: Remove vars that are set but not used.
         (DECODE_COMPOSITION_RULE): Remove 2nd arg, which is unused.
         All callers changed.
diff --git a/src/term.c b/src/term.c
index fc7726298c5..fc07c2b8d06 100644
--- a/src/term.c
+++ b/src/term.c
@@ -707,6 +707,7 @@ tty_write_glyphs (struct frame *f, struct glyph *string, int len)
 {
   unsigned char *conversion_buffer;
   struct coding_system *coding;
+  size_t n, stringlen;
 
   struct tty_display_info *tty = FRAME_TTY (f);
 
@@ -734,13 +735,12 @@ tty_write_glyphs (struct frame *f, struct glyph *string, int len)
      the tail.  */
   coding->mode &= ~CODING_MODE_LAST_BLOCK;
 
-  while (len > 0)
+  for (stringlen = len; stringlen != 0; stringlen -= n)
     {
       /* Identify a run of glyphs with the same face.  */
       int face_id = string->face_id;
-      int n;
 
-      for (n = 1; n < len; ++n)
+      for (n = 1; n < stringlen; ++n)
         if (string[n].face_id != face_id)
           break;
 
@@ -748,7 +748,7 @@ tty_write_glyphs (struct frame *f, struct glyph *string, int len)
       tty_highlight_if_desired (tty);
       turn_on_face (f, face_id);
 
-      if (n == len)
+      if (n == stringlen)
         /* This is the last run.  */
         coding->mode |= CODING_MODE_LAST_BLOCK;
       conversion_buffer = encode_terminal_code (string, n, coding);
@@ -762,7 +762,6 @@ tty_write_glyphs (struct frame *f, struct glyph *string, int len)
             fwrite (conversion_buffer, 1, coding->produced, tty->termscript);
           UNBLOCK_INPUT;
         }
-      len -= n;
       string += n;
 
       /* Turn appearance modes off.  */