From 5da821a8a3cfffc18f5a656852d98e69cff5dd8f Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Wed, 13 Aug 2014 10:31:31 -0400
Subject: [PATCH] Add a simple coccinelle script to replace malloc->calloc

Coccinelle is a semantic patching tool that can automatically change
C code via semantic patching.

This script also replaces realloc with reallocarray as appropriate.
---
 scripts/coccinelle/calloc.cocci | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 scripts/coccinelle/calloc.cocci

diff --git a/scripts/coccinelle/calloc.cocci b/scripts/coccinelle/calloc.cocci
new file mode 100644
index 0000000000..8a295eb4fd
--- /dev/null
+++ b/scripts/coccinelle/calloc.cocci
@@ -0,0 +1,20 @@
+// Use calloc or realloc as appropriate instead of multiply-and-alloc
+
+@malloc_to_calloc@
+expression a,b;
+@@
+- tor_malloc(a * b)
++ tor_calloc(a, b)
+
+@malloc_zero_to_calloc@
+expression a, b;
+@@
+- tor_malloc_zero(a * b)
++ tor_calloc(a, b)
+
+@realloc_to_reallocarray@
+expression a, b;
+expression p;
+@@
+- tor_realloc(p, a * b)
++ tor_reallocarray(p, a, b)
-- 
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