From 54ec927d886b895b1ec7bbe62c143b052970fdf6 Mon Sep 17 00:00:00 2001
From: Dimitri van Heesch <doxygen@gmail.com>
Date: Mon, 23 Dec 2019 14:03:44 +0100
Subject: Fix for use of non portable strnstr function

---
 src/markdown.cpp |  3 ++-
 src/portable.cpp | 15 +++++++++++++++
 src/portable.h   |  1 +
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/markdown.cpp b/src/markdown.cpp
index 0a71aae..8594a15 100644
--- a/src/markdown.cpp
+++ b/src/markdown.cpp
@@ -51,6 +51,7 @@
 #include "config.h"
 #include "section.h"
 #include "message.h"
+#include "portable.h"
 
 //-----------
 
@@ -1031,7 +1032,7 @@ static int processCodeSpan(GrowBuf &out, const char *data, int /*offset*/, int s
 
 static void addStrEscapeUtf8Nbsp(GrowBuf &out,const char *s,int len)
 {
-  if (strnstr(s,g_doxy_nsbp,len)==0) // no escape needed -> fast
+  if (Portable::strnstr(s,g_doxy_nsbp,len)==0) // no escape needed -> fast
   {
     out.addStr(s,len);
   }
diff --git a/src/portable.cpp b/src/portable.cpp
index 1134351..9927c45 100644
--- a/src/portable.cpp
+++ b/src/portable.cpp
@@ -475,3 +475,18 @@ void Portable::setShortDir(void)
   delete [] buffer;
 #endif
 }
+
+
+char *Portable::strnstr(const char *haystack, const char *needle, size_t haystack_len)
+{
+  size_t needle_len = strnlen(needle, haystack_len);
+  if (needle_len < haystack_len || !needle[needle_len]) 
+  {
+    char *x = static_cast<char*>(memmem(haystack, haystack_len, needle, needle_len));
+    if (x && !memchr(haystack, 0, x - haystack))
+    {
+      return x;
+    }
+  }
+  return 0;
+}
diff --git a/src/portable.h b/src/portable.h
index 27b7052..be73435 100644
--- a/src/portable.h
+++ b/src/portable.h
@@ -42,6 +42,7 @@ namespace Portable
   bool           isAbsolutePath(const char *fileName);
   void           correct_path(void);
   void           setShortDir(void);
+  char *         strnstr(const char *haystack, const char *needle, size_t haystack_len);
 }
 
 
-- 
cgit v0.12