/trunk/Lib/ocaml/std_string.i

/* -----------------------------------------------------------------------------
 * std_string.i
 *
 * SWIG typemaps for std::string
 * ----------------------------------------------------------------------------- */

// ------------------------------------------------------------------------
// std::string is typemapped by value
// This can prevent exporting methods which return a string
// in order for the user to modify it.
// However, I think I'll wait until someone asks for it...
// ------------------------------------------------------------------------

%{
#include <string>
#include <vector>
%}
  
%include <exception.i>
%include <std_vector.i>

namespace std {

%naturalvar string;
%naturalvar wstring;
  
class string;
class wstring;
  
/* Overloading check */
%typemap(in) string {
  /* %typemap(in) string */
  if (caml_ptr_check($input))
    $1.assign((char *)caml_ptr_val($input,0), caml_string_len($input));
  else
    SWIG_exception(SWIG_TypeError, "string expected");
}

%typemap(in) const string & (std::string temp) {
  /* %typemap(in) const string & */
  if (caml_ptr_check($input)) {
    temp.assign((char *)caml_ptr_val($input,0), caml_string_len($input));
    $1 = &temp;
  } else {
    SWIG_exception(SWIG_TypeError, "string expected");
  }
}

%typemap(in) string & (std::string temp) {
  /* %typemap(in) string & */
  if (caml_ptr_check($input)) {
    temp.assign((char *)caml_ptr_val($input,0), caml_string_len($input));
    $1 = &temp;
  } else {
    SWIG_exception(SWIG_TypeError, "string expected");
  }
}

%typemap(in) string * (std::string *temp) {
  /* %typemap(in) string * */
  if (caml_ptr_check($input)) {
    temp = new std::string((char *)caml_ptr_val($input,0), caml_string_len($input));
    $1 = temp;
  } else {
    SWIG_exception(SWIG_TypeError, "string expected");
  }
}

%typemap(free) string * (std::string *temp) {
  delete temp;
}

%typemap(argout) string & {
  /* %typemap(argout) string & */
  swig_result =	caml_list_append(swig_result,caml_val_string_len((*$1).c_str(), (*$1).size()));
}

%typemap(directorout) string {
  /* %typemap(directorout) string */
	$result.assign((char *)caml_ptr_val($input,0), caml_string_len($input));
}

%typemap(out) string {
  /* %typemap(out) string */
  $result = caml_val_string_len($1.c_str(),$1.size());
}

%typemap(out) string * {
  /* %typemap(out) string * */
	$result = caml_val_string_len((*$1).c_str(),(*$1).size());
}
}

#ifdef ENABLE_CHARPTR_ARRAY
char **c_charptr_array( const std::vector <std::string > &str_v );

%{
  SWIGEXT char **c_charptr_array( const std::vector <std::string > &str_v ) {
    char **out = new char *[str_v.size() + 1];
    out[str_v.size()] = 0;
    for( int i = 0; i < str_v.size(); i++ ) {
      out[i] = (char *)str_v[i].c_str();
    }
    return out;
  }
%}
#endif

#ifdef ENABLE_STRING_VECTOR
%template (StringVector) std::vector<std::string >;

%insert(ml) %{
  (* Some STL convenience items *)

  let string_array_to_vector sa = 
    let nv = _new_StringVector C_void in
      array_to_vector nv (fun x -> C_string x) sa ; nv
	
  let c_string_array ar = 
    _c_charptr_array (string_array_to_vector ar)
%}

%insert(mli) %{
  val c_string_array: string array -> c_obj
%}
#endif