1 files changed, 144 insertions, 0 deletions
diff --git a/xmalloc.c b/xmalloc.c
new file mode 100644
index 00000000..6bf63bef
--- /dev/null
+++ b/xmalloc.c
@@ -0,0 +1,144 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2004 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+
+#include <errno.h>
+#include <libgen.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+char *
+xstrdup(const char *s)
+{
+	void	*ptr;
+	size_t	 len;
+
+	len = strlen(s) + 1;
+	ptr = xmalloc(len);
+
+        return (strncpy(ptr, s, len));
+}
+
+void *
+xcalloc(size_t nmemb, size_t size)
+{
+        void	*ptr;
+
+        if (size == 0 || nmemb == 0)
+		fatalx("zero size");
+        if (SIZE_MAX / nmemb < size)
+                fatalx("nmemb * size > SIZE_MAX");
+        if ((ptr = calloc(nmemb, size)) == NULL)
+		fatal("xcalloc failed");
+
+        return (ptr);
+}
+
+void *
+xmalloc(size_t size)
+{
+	void	*ptr;
+
+        if (size == 0)
+                fatalx("zero size");
+        if ((ptr = malloc(size)) == NULL)
+		fatal("xmalloc failed");
+
+        return (ptr);
+}
+
+void *
+xrealloc(void *oldptr, size_t nmemb, size_t size)
+{
+	size_t	 newsize = nmemb * size;
+	void	*newptr;
+
+	if (newsize == 0)
+                fatalx("zero size");
+        if (SIZE_MAX / nmemb < size)
+                fatalx("nmemb * size > SIZE_MAX");
+        if ((newptr = realloc(oldptr, newsize)) == NULL)
+		fatal("xrealloc failed");
+
+        return (newptr);
+}
+
+void
+xfree(void *ptr)
+{
+	if (ptr == NULL)
+		fatalx("null pointer");
+	free(ptr);
+}
+
+int printflike2
+xasprintf(char **ret, const char *fmt, ...)
+{
+        va_list ap;
+        int	i;
+
+        va_start(ap, fmt);
+        i = xvasprintf(ret, fmt, ap);
+        va_end(ap);
+
+	return (i);
+}
+
+int
+xvasprintf(char **ret, const char *fmt, va_list ap)
+{
+	int	i;
+
+	i = vasprintf(ret, fmt, ap);
+        if (i < 0 || *ret == NULL)
+                fatal("xvasprintf failed");
+
+        return (i);
+}
+
+int printflike3
+xsnprintf(char *buf, size_t len, const char *fmt, ...)
+{
+        va_list ap;
+        int	i;
+
+        va_start(ap, fmt);
+        i = xvsnprintf(buf, len, fmt, ap);
+        va_end(ap);
+
+	return (i);
+}
+
+int
+xvsnprintf(char *buf, size_t len, const char *fmt, va_list ap)
+{
+	int	i;
+
+	if (len > INT_MAX)
+		fatalx("len > INT_MAX");
+
+	i = vsnprintf(buf, len, fmt, ap);
+        if (i < 0)
+                fatal("vsnprintf failed");
+
+        return (i);
+}