Update to xalloc.

3 files changed, 13 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index fddd2879..bf1461d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2014-11-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Port to systems where malloc (0) and/or realloc(P, 0) returns NULL.
+	* gawkmisc.c (xmalloc):
+	* xalloc.h (realloc):
+	Do not fail if malloc(0) or realloc(P, 0) returns NULL.
+	Fail only when the allocator returns null when attempting to
+	allocate a nonzero number of bytes.
+
 2014-11-19         Arnold D. Robbins     <arnold@skeeve.com>
 
 	Infrastructure upgrades:
diff --git a/gawkmisc.c b/gawkmisc.c
index a729d88d..fff5cc56 100644
--- a/gawkmisc.c
+++ b/gawkmisc.c
@@ -51,7 +51,8 @@ extern pointer xmalloc(size_t bytes);	/* get rid of gcc warning */
 pointer
 xmalloc(size_t bytes)
 {
-	pointer p;
-	emalloc(p, pointer, bytes, "xmalloc");
+	pointer p = malloc(bytes);
+	if (!p && bytes)
+		xalloc_die ();	  
 	return p;
 }
diff --git a/xalloc.h b/xalloc.h
index 0d169cf9..5ee45164 100644
--- a/xalloc.h
+++ b/xalloc.h
@@ -156,7 +156,7 @@ void *
 xrealloc(void *p, size_t size)
 {
    void *new_p = realloc(p, size);
-   if (new_p ==  0)
+   if (!new_p && size)
      xalloc_die ();
 
    return new_p;