use ssize_t and size_t for read- and write-like emacs_gnutls_* functions

* gnutls.c (emacs_gnutls_read): Adjust signature to be more read-like:
return ssize_t not "int", and use size_t as the buffer length.
(emacs_gnutls_write): Likewise, and make the buffer pointer "const".
* gnutls.h: Update declarations.
* process.c (read_process_output): Use ssize_t, to match.
(send_process): Likewise.

4 files changed, 26 insertions, 15 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index a1a5abe87c3..3eaf1e326b5 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,13 @@
+2011-04-10  Jim Meyering  <meyering@redhat.com>
+
+        use ssize_t and size_t for read- and write-like emacs_gnutls_* functions
+        * gnutls.c (emacs_gnutls_read): Adjust signature to be more read-like:
+        return ssize_t not "int", and use size_t as the buffer length.
+        (emacs_gnutls_write): Likewise, and make the buffer pointer "const".
+        * gnutls.h: Update declarations.
+        * process.c (read_process_output): Use ssize_t, to match.
+        (send_process): Likewise.
+
 2011-04-09  Chong Yidong  <cyd@stupidchicken.com>
 
         * image.c (Fimagemagick_types): Doc fix, and comment cleanup.
diff --git a/src/gnutls.c b/src/gnutls.c
index 3a461891e2e..d9e4dcec15a 100644
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -70,11 +70,12 @@ emacs_gnutls_handshake (struct Lisp_Process *proc)
     }
 }
 
-int
-emacs_gnutls_write (int fildes, struct Lisp_Process *proc, char *buf,
-                    unsigned int nbyte)
+ssize_t
+emacs_gnutls_write (int fildes, struct Lisp_Process *proc, const char *buf,
+                    size_t nbyte)
 {
-  register int rtnval, bytes_written;
+  ssize_t rtnval;
+  size_t bytes_written;
   gnutls_session_t state = proc->gnutls_state;
 
   if (proc->gnutls_initstage != GNUTLS_STAGE_READY) {
@@ -109,11 +110,11 @@ emacs_gnutls_write (int fildes, struct Lisp_Process *proc, char *buf,
   return (bytes_written);
 }
 
-int
+ssize_t
 emacs_gnutls_read (int fildes, struct Lisp_Process *proc, char *buf,
-                   unsigned int nbyte)
+                   size_t nbyte)
 {
-  register int rtnval;
+  ssize_t rtnval;
   gnutls_session_t state = proc->gnutls_state;
 
   if (proc->gnutls_initstage != GNUTLS_STAGE_READY)
diff --git a/src/gnutls.h b/src/gnutls.h
index 43a9eefce1b..b39131b6236 100644
--- a/src/gnutls.h
+++ b/src/gnutls.h
@@ -50,15 +50,15 @@ typedef enum
 
 #define GNUTLS_LOG2(level, max, string, extra) if (level <= max) { gnutls_log_function2 (level, "(Emacs) " string, extra); }
 
-int
-emacs_gnutls_write (int fildes, struct Lisp_Process *proc, char *buf,
-                    unsigned int nbyte);
-int
+ssize_t
+emacs_gnutls_write (int fildes, struct Lisp_Process *proc, const char *buf,
+                    size_t nbyte);
+ssize_t
 emacs_gnutls_read (int fildes, struct Lisp_Process *proc, char *buf,
-                   unsigned int nbyte);
+                   size_t nbyte);
 
 extern void syms_of_gnutls (void);
 
-#endif 
+#endif
 
 #endif
diff --git a/src/process.c b/src/process.c
index 6cddbf6d1a9..624610069d8 100644
--- a/src/process.c
+++ b/src/process.c
@@ -4898,7 +4898,7 @@ read_process_output_error_handler (Lisp_Object error_val)
 static int
 read_process_output (Lisp_Object proc, register int channel)
 {
-  register int nbytes;
+  register ssize_t nbytes;
   char *chars;
   register Lisp_Object outstream;
   register struct Lisp_Process *p = XPROCESS (proc);
@@ -5243,7 +5243,7 @@ send_process (volatile Lisp_Object proc, const char *volatile buf,
 {
   /* Use volatile to protect variables from being clobbered by longjmp.  */
   struct Lisp_Process *p = XPROCESS (proc);
-  EMACS_INT rv;
+  ssize_t rv;
   struct coding_system *coding;
   struct gcpro gcpro1;
   void (*volatile old_sigpipe) (int);