Re: A couple of uses of xmalloc and xfree in a couple of .y files

[Pedro Alves <pedro at codesourcery dot com>]

On Monday 27 October 2008 11:48:00, Pedro Alves wrote:
> Ok, I think that makes for: one "funny we don't do it", one "got mildly
> tickled by the inconsistency, although doesn't care that much, but
> wrote the patch anyway", one "non-silent don't care", a bunch of
> silent don't care's, and one "it's useful".
> 
> I believe that's a positive balance.  :-)
> 
> Checked in.
> 

Grrrrr, things are never that simple...

Somehow, I missed rebuilding this file (.y.c doesn't depend on
Makefile.in), so I missed this breakage:

 cp-name-parser.c.tmp: In function 'cpname_parse':
 cp-name-parser.c.tmp:1990: warning: implicit declaration of function 'xfree'

The fix is to include "defs.h" instead of "config.h" directly, as the
other .y files do.  While doing that, I hit the fact that there's an
external parse_escape function in utils.c, declared in defs.h that now
colides with the static cp-name-parse.y:parse_escape.  They're mostly the
same, but this file it also buildable as a standalone program, so I just
renamed the one in cp-name-parser.y.  The xfree issue is described in the
patch itself.

Phew, hope the attached (already commited) settles it.  I made sure
that `make test-cp-name-parser' still links the standalone
test program.

-- 
Pedro Alves

2008-10-27  Pedro Alves  <pedro@codesourcery.com>

	* cp-name-parser.y: Include defs.h instead of config.h.
	(parse_escape): Rename to ...
	(cp_parse_escape): ... this.
	(yylex): Update.
	(xfree) [TEST_CPNAMES]: New.

---
 gdb/cp-name-parser.y |   18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

Index: src/gdb/cp-name-parser.y
===================================================================
--- src.orig/gdb/cp-name-parser.y	2008-10-27 18:40:25.000000000 +0000
+++ src/gdb/cp-name-parser.y	2008-10-27 19:16:47.000000000 +0000
@@ -31,7 +31,7 @@ Boston, MA 02110-1301, USA.  */
 
 %{
 
-#include "config.h"
+#include "defs.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -1462,7 +1462,7 @@ c_parse_backslash (int host_char, int *t
    after the zeros.  A value of 0 does not mean end of string.  */
 
 static int
-parse_escape (const char **string_ptr)
+cp_parse_escape (const char **string_ptr)
 {
   int target_char;
   int c = *(*string_ptr)++;
@@ -1483,7 +1483,7 @@ parse_escape (const char **string_ptr)
 	  if (c == '?')
 	    return 0177;
 	  else if (c == '\\')
-	    target_char = parse_escape (string_ptr);
+	    target_char = cp_parse_escape (string_ptr);
 	  else
 	    target_char = c;
 
@@ -1581,7 +1581,7 @@ yylex (void)
       lexptr++;
       c = *lexptr++;
       if (c == '\\')
-	c = parse_escape (&lexptr);
+	c = cp_parse_escape (&lexptr);
       else if (c == '\'')
 	{
 	  yyerror ("empty character constant");
@@ -2084,6 +2084,16 @@ trim_chars (char *lexptr, char **extra_c
   return c;
 }
 
+/* When this file is built as a standalone program, xmalloc comes from
+   libiberty --- in which case we have to provide xfree ourselves.  */
+
+void
+xfree (void *ptr)
+{
+  if (ptr != NULL)
+    free (ptr);
+}
+
 int
 main (int argc, char **argv)
 {