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.

1 files changed, 8 insertions, 7 deletions

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)