Fix write-region and its subroutines for buffers > 2GB.

 src/fileio.c (a_write, e_write): Modify declaration of arguments and
 local variables to support buffers larger than 2GB.
 (Fcopy_file): Use EMACS_INT for return value of emacs_read.
 src/sysdep.c (emacs_write, emacs_read): Use ssize_t for last
 argument, local variables, and return value.
 src/lisp.h: Update prototypes of emacs_write and emacs_read.
 src/sound.c (vox_write): Use ssize_t for return value of emacs_write.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index f4f767dac3f..37c9f73dba9 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -1825,10 +1825,10 @@ emacs_close (int fd)
   return rtnval;
 }
 
-int
-emacs_read (int fildes, char *buf, unsigned int nbyte)
+ssize_t
+emacs_read (int fildes, char *buf, ssize_t nbyte)
 {
-  register int rtnval;
+  register ssize_t rtnval;
 
   while ((rtnval = read (fildes, buf, nbyte)) == -1
          && (errno == EINTR))
@@ -1836,10 +1836,10 @@ emacs_read (int fildes, char *buf, unsigned int nbyte)
   return (rtnval);
 }
 
-int
-emacs_write (int fildes, const char *buf, unsigned int nbyte)
+ssize_t
+emacs_write (int fildes, const char *buf, ssize_t nbyte)
 {
-  register int rtnval, bytes_written;
+  register ssize_t rtnval, bytes_written;
 
   bytes_written = 0;