upfdated to the typemaps to support std:strings with '\0' in them, and to add a typemap for SWIGTYPE** OUTPUT

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9221 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/CHANGES.current

@@ -1,5 +1,9 @@
 Version 1.3.30 (in progress)
 ============================
+07/21/2006: mgossage
+	    Bugfix #1526022 pdated std::string to support strings with '\0' inside them
+	    updated typemaps.i to add support for pointer to pointers
+
 07/19/2006: mutandiz
 	    [allegrocl]
 	    - Add std_string.i support.

SWIG/Lib/lua/std_string.i

@@ -14,6 +14,9 @@
 Only std::string and const std::string& are typemaped
 they are converted to the Lua strings automatically
 
+std::string& and std::string* are not
+they must be explicitly managed (see below)
+
 eg.
 
 std::string test_value(std::string x) {
@@ -30,20 +33,35 @@ assert(s==s2)
 
 %naturalvar std::string;
 
-%typemap(in,checkfn="lua_isstring") std::string
-%{$1 = (char*)lua_tostring(L, $input);%}
+/*
+Bug report #1526022 by neomantra
+Lua strings and std::string can contain embeded zero's
+Therefore a standard out typemap should not be:
+  lua_pushstring(L,$1.c_str());
+but
+  lua_pushlstring(L,$1.data(),$1.size());
 
+Similarly for getting the string
+  $1 = (char*)lua_tostring(L, $input);
+becomes
+  $1.assign(lua_tostring(L,$input),lua_strlen(L,$input));
+  
+Not using: lua_tolstring() as this is only found in Lua 5.1 & not 5.0.2
+*/
+
+%typemap(in,checkfn="lua_isstring") std::string
+%{$1.assign(lua_tostring(L,$input),lua_strlen(L,$input));%}
 %typemap(out) std::string
-%{  lua_pushstring(L,$1.c_str()); SWIG_arg++;%}
+%{ lua_pushlstring(L,$1.data(),$1.size()); SWIG_arg++;%}
 
 %typemap(in,checkfn="lua_isstring")	const std::string& (std::string temp)
-%{temp=(char*)lua_tostring(L, $input); $1=&temp;%}
+%{temp.assign(lua_tostring(L,$input),lua_strlen(L,$input)); $1=&temp;%}
+
 %typemap(out) const std::string&
-%{  lua_pushstring(L,$1->c_str()); SWIG_arg++;%}
+%{ lua_pushlstring(L,$1->data(),$1->size()); SWIG_arg++;%}
 
 %typemap(throws) std::string,const std::string&
-%{lua_pushstring(L,$1.c_str());
-SWIG_fail; %}
+%{ lua_pushlstring(L,$1.data(),$1.size()); SWIG_fail;%}
 
 // and the typechecks
 %typecheck(SWIG_TYPECHECK_STRING) std::string,const std::string& {
@@ -68,7 +86,7 @@ typemaps to tell SWIG what to do.
 %typemap(in, numinputs=0) std::string &OUTPUT (std::string temp)
 %{ $1 = &temp; %}
 %typemap(argout) std::string &OUTPUT
-%{  lua_pushstring(L,$1.c_str()); SWIG_arg++;%}
+%{ lua_pushlstring(L,$1->data(),$1->size()); SWIG_arg++;%}
 %typemap(in) std::string &INOUT =const std::string &;
 %typemap(argout) std::string &INOUT = std::string &OUTPUT;
 

SWIG/Lib/lua/typemaps.i

@@ -491,3 +491,37 @@ void SWIG_write_ptr_array(lua_State* L,void **array,int size,swig_type_info *typ
 %{	SWIG_write_ptr_array(L,(void**)$1,$2,$*1_descriptor,0); SWIG_arg++; %}
 %typemap(freearg) (SWIGTYPE**INOUT,int)=(SWIGTYPE**INPUT,int);
 
+/* -----------------------------------------------------------------------------
+ *                          Pointer-Pointer typemaps
+ * ----------------------------------------------------------------------------- */
+/*
+This code is to deal with the issue for pointer-pointer's
+In particular for factory methods.
+
+for example take the following code segment:
+
+struct iMath;    // some structure
+int Create_Math(iMath** pptr); // its factory (assume it mallocs)
+
+to use it you might have the following C code:
+
+iMath* ptr;
+int ok;
+ok=Create_Math(&ptr);
+// do things with ptr
+//...
+free(ptr);
+
+With the following SWIG code
+%apply SWIGTYPE** OUTPUT{iMath **pptr };
+
+You can get natural wrappering in Lua as follows:
+ok,ptr=Create_Math() -- ptr is a iMath* which is returned with the int
+ptr=nil -- the iMath* will be GC'ed as normal
+*/
+
+%typemap(in,numinputs=0) SWIGTYPE** OUTPUT ($*ltype temp)
+%{  $1 = &temp; %}
+%typemap(argout) SWIGTYPE** OUTPUT
+%{SWIG_NewPointerObj(L,*$1,$*descriptor,1); SWIG_arg++; %}
+