dtc: Move some functions to util.[ch]

Now that we have a util.[ch] file shared between dtc and
convert-dtsv0, move some functions which are currently duplicated in
the two to util files.  Specifically we move the die(), xmalloc() and
xrealloc() functions.

While we're at it, add standard double-include protection to util.h

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 35 insertions, 0 deletions

diff --git a/util.h b/util.h
index 1fa78eb..0fb60fe 100644
--- a/util.h
+++ b/util.h
@@ -1,3 +1,6 @@
+#ifndef _UTIL_H
+#define _UTIL_H
+
 /*
  * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
  *
@@ -17,4 +20,36 @@
  *                                                                   USA
  */
 
+static inline void __attribute__((noreturn)) die(char * str, ...)
+{
+	va_list ap;
+
+	va_start(ap, str);
+	fprintf(stderr, "FATAL ERROR: ");
+	vfprintf(stderr, str, ap);
+	exit(1);
+}
+
+static inline void *xmalloc(size_t len)
+{
+	void *new = malloc(len);
+
+	if (!new)
+		die("malloc() failed\n");
+
+	return new;
+}
+
+static inline void *xrealloc(void *p, size_t len)
+{
+	void *new = realloc(p, len);
+
+	if (!new)
+		die("realloc() failed (len=%d)\n", len);
+
+	return new;
+}
+
 extern char *xstrdup(const char *s);
+
+#endif /* _UTIL_H */