From 4c2e5d7ebf200b32711b6b6a1d4fd94287fc2394 Mon Sep 17 00:00:00 2001
From: "Wolfgang (Blub) Bumiller" <blub@speed.at>
Date: Sun, 18 Nov 2012 14:39:24 +0100
Subject: [PATCH] update old_string after a recursive preprocess call so we
 don't reset to a free'd vector; add recursion header/footer pragmas

---
 ftepp.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/ftepp.c b/ftepp.c
index ad5e7c7..f0c34e4 100644
--- a/ftepp.c
+++ b/ftepp.c
@@ -483,6 +483,16 @@ static void ftepp_stringify(ftepp_t *ftepp, macroparam *param)
     ftepp_out(ftepp, "\"", false);
 }
 
+static void ftepp_recursion_header(ftepp_t *ftepp)
+{
+    ftepp_out(ftepp, "\n#pragma push(line)\n", false);
+}
+
+static void ftepp_recursion_footer(ftepp_t *ftepp)
+{
+    ftepp_out(ftepp, "\n#pragma pop(line)\n", false);
+}
+
 static bool ftepp_preprocess(ftepp_t *ftepp);
 static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *params)
 {
@@ -560,11 +570,14 @@ static bool ftepp_macro_expand(ftepp_t *ftepp, ppmacro *macro, macroparam *param
     }
     ftepp->output_string = old_string;
     ftepp->lex = inlex;
+    ftepp_recursion_header(ftepp);
     if (!ftepp_preprocess(ftepp)) {
         lex_close(ftepp->lex);
         retval = false;
         goto cleanup;
     }
+    ftepp_recursion_footer(ftepp);
+    old_string = ftepp->output_string;
 
 cleanup:
     ftepp->lex           = old_lexer;