* sound.c: Don't assume sizes fit in 'int'.

(struct sound_device.period_size, alsa_period_size):
Return size_t, not int.
(struct sound_device.write, vox_write, alsa_write):
Accept size_t, not int.
(wav_play, au_play): Use size_t to store sizes, and ssize_t to
record read return values.

2 files changed, 23 insertions, 14 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 211625ee446..6b0e575e36d 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,13 @@
+2011-04-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+        * sound.c: Don't assume sizes fit in 'int'.
+        (struct sound_device.period_size, alsa_period_size):
+        Return size_t, not int.
+        (struct sound_device.write, vox_write, alsa_write):
+        Accept size_t, not int.
+        (wav_play, au_play): Use size_t to store sizes, and ssize_t to
+        record read return values.
+
 2011-04-12  Andreas Schwab  <schwab@linux-m68k.org>
 
         * charset.c (Fclear_charset_maps): Use xfree instead of free.
diff --git a/src/sound.c b/src/sound.c
index 7d7317e71b3..c0741f27ff6 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -235,11 +235,11 @@ struct sound_device
 
   /* Return a preferred data size in bytes to be sent to write (below)
      each time.  2048 is used if this is NULL.  */
-  int (* period_size) (struct sound_device *sd);
+  size_t (* period_size) (struct sound_device *sd);
 
   /* Write NYBTES bytes from BUFFER to device SD.  */
   void (* write) (struct sound_device *sd, const char *buffer,
-                  int nbytes);
+                  size_t nbytes);
 
   /* A place for devices to store additional data.  */
   void *data;
@@ -291,7 +291,7 @@ static void vox_configure (struct sound_device *);
 static void vox_close (struct sound_device *sd);
 static void vox_choose_format (struct sound_device *, struct sound *);
 static int vox_init (struct sound_device *);
-static void vox_write (struct sound_device *, const char *, int);
+static void vox_write (struct sound_device *, const char *, size_t);
 static void find_sound_type (struct sound *);
 static u_int32_t le2hl (u_int32_t);
 static u_int16_t le2hs (u_int16_t);
@@ -600,9 +600,9 @@ wav_play (struct sound *s, struct sound_device *sd)
   else
     {
       char *buffer;
-      int nbytes = 0;
-      int blksize = sd->period_size ? sd->period_size (sd) : 2048;
-      int data_left = header->data_length;
+      ssize_t nbytes = 0;
+      size_t blksize = sd->period_size ? sd->period_size (sd) : 2048;
+      size_t data_left = header->data_length;
 
       buffer = (char *) alloca (blksize);
       lseek (s->fd, sizeof *header, SEEK_SET);
@@ -690,9 +690,9 @@ au_play (struct sound *s, struct sound_device *sd)
                SBYTES (s->data) - header->data_offset);
   else
     {
-      int blksize = sd->period_size ? sd->period_size (sd) : 2048;
+      size_t blksize = sd->period_size ? sd->period_size (sd) : 2048;
       char *buffer;
-      int nbytes;
+      ssize_t nbytes;
 
       /* Seek */
       lseek (s->fd, header->data_offset, SEEK_SET);
@@ -895,10 +895,9 @@ vox_init (struct sound_device *sd)
 /* Write NBYTES bytes from BUFFER to device SD.  */
 
 static void
-vox_write (struct sound_device *sd, const char *buffer, int nbytes)
+vox_write (struct sound_device *sd, const char *buffer, size_t nbytes)
 {
-  ssize_t nwritten = emacs_write (sd->fd, buffer, nbytes);
-  if (nwritten < 0)
+  if (emacs_write (sd->fd, buffer, nbytes) != nbytes)
     sound_perror ("Error writing to sound device");
 }
 
@@ -953,7 +952,7 @@ alsa_open (struct sound_device *sd)
     alsa_sound_perror (file, err);
 }
 
-static int
+static size_t
 alsa_period_size (struct sound_device *sd)
 {
   struct alsa_params *p = (struct alsa_params *) sd->data;
@@ -1156,13 +1155,13 @@ alsa_choose_format (struct sound_device *sd, struct sound *s)
 /* Write NBYTES bytes from BUFFER to device SD.  */
 
 static void
-alsa_write (struct sound_device *sd, const char *buffer, int nbytes)
+alsa_write (struct sound_device *sd, const char *buffer, size_t nbytes)
 {
   struct alsa_params *p = (struct alsa_params *) sd->data;
 
   /* The the third parameter to snd_pcm_writei is frames, not bytes. */
   int fact = snd_pcm_format_size (sd->format, 1) * sd->channels;
-  int nwritten = 0;
+  size_t nwritten = 0;
   int err;
 
   while (nwritten < nbytes)