1 files changed, 105 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/menu/refstr.c b/contrib/syslinux-4.02/com32/menu/refstr.c
new file mode 100644
index 0000000..97ab1ed
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/menu/refstr.c
@@ -0,0 +1,105 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2008 H. Peter Anvin - All Rights Reserved
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ *   Boston MA 02110-1301, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * refstr.c
+ *
+ * Simple reference-counted strings
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "refstr.h"
+
+/* Allocate space for a refstring of len bytes, plus final null */
+/* The final null is inserted in the string; the rest is uninitialized. */
+char *refstr_alloc(size_t len)
+{
+    char *r = malloc(sizeof(unsigned int) + len + 1);
+    if (!r)
+	return NULL;
+    *(unsigned int *)r = 1;
+    r += sizeof(unsigned int);
+    r[len] = '\0';
+    return r;
+}
+
+const char *refstrndup(const char *str, size_t len)
+{
+    char *r;
+
+    if (!str)
+	return NULL;
+
+    len = strnlen(str, len);
+    r = refstr_alloc(len);
+    if (r)
+	memcpy(r, str, len);
+    return r;
+}
+
+const char *refstrdup(const char *str)
+{
+    char *r;
+    size_t len;
+
+    if (!str)
+	return NULL;
+
+    len = strlen(str);
+    r = refstr_alloc(len);
+    if (r)
+	memcpy(r, str, len);
+    return r;
+}
+
+int vrsprintf(const char **bufp, const char *fmt, va_list ap)
+{
+    va_list ap1;
+    int len;
+    char *p;
+
+    va_copy(ap1, ap);
+    len = vsnprintf(NULL, 0, fmt, ap1);
+    va_end(ap1);
+
+    *bufp = p = refstr_alloc(len);
+    if (!p)
+	return -1;
+
+    return vsnprintf(p, len + 1, fmt, ap);
+}
+
+int rsprintf(const char **bufp, const char *fmt, ...)
+{
+    int rv;
+    va_list ap;
+
+    va_start(ap, fmt);
+    rv = vrsprintf(bufp, fmt, ap);
+    va_end(ap);
+
+    return rv;
+}
+
+void refstr_put(const char *r)
+{
+    unsigned int *ref;
+
+    if (r) {
+	ref = (unsigned int *)r - 1;
+
+	if (!--*ref)
+	    free(ref);
+    }
+}