From 24f08a61e6456fb2bdf1382000a0b4b3bf910d45 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 17 Sep 2020 23:31:28 +0000
Subject:  Add stralloc_readyplus_tuned, fix overflow on stralloc_readyplus

---
 src/libstddjb/stralloc_readyplus_tuned.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 src/libstddjb/stralloc_readyplus_tuned.c

(limited to 'src/libstddjb')

diff --git a/src/libstddjb/stralloc_readyplus_tuned.c b/src/libstddjb/stralloc_readyplus_tuned.c
new file mode 100644
index 0000000..f00813f
--- /dev/null
+++ b/src/libstddjb/stralloc_readyplus_tuned.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/stralloc.h>
+
+int stralloc_readyplus_tuned (stralloc *sa, size_t n, size_t base, size_t a, size_t b)
+{
+  size_t newlen = sa->len + n ;
+  return newlen < sa->len ?
+    (errno = ERANGE, 0) :
+    stralloc_ready_tuned(sa, newlen, base, a, b) ;
+}
-- 
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