serial_write: change prototype to take a void-pointer buffer.

While remote.c works with "char *" buffers most of the time, other
remote targets have binary-ish-er protocols, and choose to use
"unsigned char" throughout, like e.g., remote-mips.c or
remote-m32r-sdi.c.  That results in -Wpointer-sign warnings in those
targets, unless we add casts in calls to serial_write.  Since
serial_write is only concerned about sending raw host bytes out, and
serial_ops->write_prim already works with "void *"/"size_t", a similar
interface to the "write" or "send" system calls, I find it natural to
change serial_write's prototype accordingly, avoiding the need for
casts.

Tested on x86_64 Fedora 17, and also by building x86_64-mingw32
and DJGPP/go32 -hosted gdbs.

gdb/
2013-04-19  Pedro Alves  <palves@redhat.com>

	* ser-base.c (ser_base_write): Change prototype -- take 'void *'
	buffer and size_t size.  Adjust.
	* ser-base.h (ser_base_write): Adjust.
	* ser-go32.c (cnts): Change type to size_t.
	(dos_write): Change prototype -- take 'void *'
	buffer and size_t size.  Adjust.
	(dos_info): Print elements of 'cnts' as unsigned long.
	* serial.c (serial_write): Likewise.
	* serial.h (serial_write): Adjust.
	(struct serial_ops) <write>: Change prototype -- take 'void *'
	buffer and size_t size.  Adjust.

1 files changed, 5 insertions, 4 deletions

diff --git a/gdb/ser-base.c b/gdb/ser-base.c
index c602650b2ec..52c57264931 100644
--- a/gdb/ser-base.c
+++ b/gdb/ser-base.c
@@ -440,17 +440,18 @@ ser_base_readchar (struct serial *scb, int timeout)
 }
 
 int
-ser_base_write (struct serial *scb, const char *str, int len)
+ser_base_write (struct serial *scb, const void *buf, size_t count)
 {
+  const char *str = buf;
   int cc;
 
-  while (len > 0)
+  while (count > 0)
     {
-      cc = scb->ops->write_prim (scb, str, len); 
+      cc = scb->ops->write_prim (scb, str, count);
 
       if (cc < 0)
 	return 1;
-      len -= cc;
+      count -= cc;
       str += cc;
     }
   return 0;