Resolves: rhbz#918938 crash in danish thesaurus/spell interaction

Change-Id: I911fc382a8e4b895262dcd5ae5c67c4a81e6aad4
Reviewed-on: https://gerrit.libreoffice.org/2710Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>
Reviewed-on: https://gerrit.libreoffice.org/2720Reviewed-by: Michael Stahl <mstahl@redhat.com>

hunspell/UnpackedTarball_hunspell.mk

@@ -19,6 +19,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,hunspell,\
 	hunspell/hunspell-1.3.2-nullptr.patch \
 	hunspell/hunspell-1.3.2-literal.patch \
 	hunspell/hunspell-1.3.2-compound.patch \
+	hunspell/hunspell.rhbz918938.patch \
 ))
 
 ifeq ($(COM),MSC)

hunspell/hunspell.rhbz918938.patch

+--- misc/hunspell-1.3.2/src/hunspell/hunspell.cxx	2011-02-02 12:04:29.000000000 +0000
++++ misc/build/hunspell-1.3.2/src/hunspell/hunspell.cxx	2013-03-13 16:50:50.667928521 +0000
+@@ -12,6 +12,8 @@
+ #endif
+ #include "csutil.hxx"
+ 
++#include <string>
++
+ Hunspell::Hunspell(const char * affpath, const char * dpath, const char * key)
+ {
+     encoding = NULL;
+@@ -1710,6 +1712,19 @@
+     return n;
+ }
+ 
++namespace
++{
++    void myrep(std::string& str, const std::string& search, const std::string& replace)
++    {
++        size_t pos = 0;
++        while ((pos = str.find(search, pos)) != std::string::npos)
++        {
++           str.replace(pos, search.length(), replace);
++           pos += replace.length();
++        }
++    }
++}
++
+ int Hunspell::spellml(char*** slst, const char * word)
+ {
+   char *q, *q2;
+@@ -1721,26 +1736,26 @@
+   q2 = strstr(q2, "<word");
+   if (!q2) return 0; // bad XML input
+   if (check_xml_par(q, "type=", "analyze")) {
+-      int n = 0, s = 0;
++      int n = 0;
+       if (get_xml_par(cw, strchr(q2, '>'), MAXWORDUTF8LEN - 10)) n = analyze(slst, cw);
+       if (n == 0) return 0;
+       // convert the result to <code><a>ana1</a><a>ana2</a></code> format
+-      for (int i = 0; i < n; i++) s+= strlen((*slst)[i]);
+-      char * r = (char *) malloc(6 + 5 * s + 7 * n + 7 + 1); // XXX 5*s->&->&amp;
+-      if (!r) return 0;
+-      strcpy(r, "<code>");
++      std::string r;
++      r.append("<code>");
+       for (int i = 0; i < n; i++) {
+-        int l = strlen(r);
+-        strcpy(r + l, "<a>");
+-        strcpy(r + l + 3, (*slst)[i]);
+-        mystrrep(r + l + 3, "\t", " ");
+-        mystrrep(r + l + 3, "<", "&lt;");
+-        mystrrep(r + l + 3, "&", "&amp;");
+-        strcat(r, "</a>");
++        r.append("<a>");
++
++        std::string entry((*slst)[i]);
+         free((*slst)[i]);
++        myrep(entry, "\t", " ");
++        myrep(entry, "&", "&amp;");
++        myrep(entry, "<", "&lt;");
++        r.append(entry);
++
++        r.append("</a>");
+       }
+-      strcat(r, "</code>");
+-      (*slst)[0] = r;
++      r.append("</code>");
++      (*slst)[0] = mystrdup(r.c_str());
+       return 1;
+   } else if (check_xml_par(q, "type=", "stem")) {
+       if (get_xml_par(cw, strchr(q2, '>'), MAXWORDUTF8LEN - 1)) return stem(slst, cw);