From 9d1f51c483578c66d401a59f59ad18add0e1a52f Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Sun, 10 Jan 2021 00:12:09 -0800
Subject: Simplified grammars using intrusive linked lists instead of dynamic
 arrays

---
 utils.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'utils.c')

diff --git a/utils.c b/utils.c
index cac2c7d..c18ef9e 100644
--- a/utils.c
+++ b/utils.c
@@ -3,6 +3,7 @@
  */
 
 #include <ctype.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 #include "utils.h"
@@ -186,6 +187,9 @@ size_t unescape_string(char *dest, const char *src, size_t bufsize)
 #undef PUT
 }
 
+/*
+ * Fail and exit if a memory value is NULL
+ */
 void *memcheck(void *p)
 {
     if (p == NULL) {
@@ -195,7 +199,9 @@ void *memcheck(void *p)
     return p;
 }
 
-
+/*
+ * Case-insensitive memory comparison
+ */
 int memicmp(const void *v1, const void *v2, size_t n)
 {
     int result = 0;
@@ -205,4 +211,13 @@ int memicmp(const void *v1, const void *v2, size_t n)
     return result;
 }
 
+/*
+ * Free memory, but also set the pointer to NULL for safety
+ */
+void xfree(void **p)
+{
+    free(*p);
+    p = NULL;
+}
+
 // vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
-- 
cgit v1.2.3