Lib/go/std_string.i

/* -----------------------------------------------------------------------------
 * std_string.i
 *
 * Typemaps for std::string and const std::string&
 * These are mapped to a Go string and are passed around by value.
 *
 * To use non-const std::string references use the following %apply.  Note 
 * that they are passed by value.
 * %apply const std::string & {std::string &};
 * ----------------------------------------------------------------------------- */

%{
#include <string>
%}

namespace std {

%naturalvar string;

class string;

%typemap(gotype) string, const string & "string"

%typemap(in) string
%{ $1.assign($input.p, $input.n); %}

%typemap(godirectorout) string
%{
  {
    p := Swig_malloc(len($input))
    s := (*[1<<30]byte)(unsafe.Pointer(p))[:len($input)]
    copy(s, $input)
    $result = *(*string)(unsafe.Pointer(&s))
  }
%}

%typemap(directorout) string
%{
  $result.assign($input.p, $input.n);
  free($input.p);
%}

%typemap(out,fragment="AllocateString") string
%{ $result = Swig_AllocateString($1.data(), $1.length()); %}

%typemap(goout,fragment="CopyString") string
%{ $result = swigCopyString($1) %}

%typemap(directorin,fragment="AllocateString") string
%{ $input = Swig_AllocateString($1.data(), $1.length()); %}

%typemap(godirectorin,fragment="CopyString") string
%{ $result = swigCopyString($input) %}

%typemap(throws) string
%{ _swig_gopanic($1.c_str()); %}

%typemap(in) const string &
%{
  $*1_ltype $1_str($input.p, $input.n);
  $1 = &$1_str;
%}

%typemap(godirectorout) const string &
%{
  {
    p := Swig_malloc(len($input))
    s := (*[1<<30]byte)(unsafe.Pointer(p))[:len($input)]
    copy(s, $input)
    $result = *(*string)(unsafe.Pointer(&s))
  }
%}

%typemap(directorout,warning=SWIGWARN_TYPEMAP_THREAD_UNSAFE_MSG) const string &
%{
  static $*1_ltype $1_str;
  $1_str.assign($input.p, $input.n);
  free($input.p);
  $result = &$1_str;
%}

%typemap(out,fragment="AllocateString") const string &
%{ $result = Swig_AllocateString((*$1).data(), (*$1).length()); %}

%typemap(goout,fragment="CopyString") const string &
%{ $result = swigCopyString($1) %}

%typemap(directorin,fragment="AllocateString") const string &
%{ $input = Swig_AllocateString($1.data(), $1.length()); %}

%typemap(godirectorin,fragment="CopyString") const string &
%{ $result = swigCopyString($input) %}

%typemap(throws) const string &
%{ _swig_gopanic($1.c_str()); %}


%typemap(gotype) string * "*string"

%typemap(in) string * (string temp)
%{
  if ($input) {
    temp.assign($input->p, $input->n);
    $1 = &temp;
  } else
    $1 = 0;
%}

%typemap(godirectorout) string *
%{
  if $input != nil {
    p := Swig_malloc(len(*$input))
    s := (*[1<<30]byte)(unsafe.Pointer(p))[:len(*$input)]
    copy(s, *$input)
    $result = (*string)(unsafe.Pointer(&s))
  } else {
    $result = nil
  }
%}

%typemap(directorout) string * (string temp)
%{
  temp.assign($input->p, $input->n);
  $result = &temp;
  free($input.p);
%}

%typemap(out,fragment="AllocateString") string * (_gostring_ temp)
%{
  temp = Swig_AllocateString($1->data(), $1->length());
  $result = &temp;
%}

%typemap(goout,fragment="CopyString") string *
%{ *$result = swigCopyString(*$1) %}

%typemap(directorin,fragment="AllocateString") string * (_gostring_ temp)
%{
  if ($1) {
    temp = Swig_AllocateString($1->data(), $1->length());
    $input = &temp;
  } else
    $input = 0;
%}

%typemap(godirectorin,fragment="CopyString") string *
%{ *$result = swigCopyString(*$input); %}

%typemap(argout,fragment="AllocateString") string *
%{
  if ($1)
    *$input = Swig_AllocateString($1->data(), $1->length());
%}

%typemap(goargout,fragment="CopyString") string *
%{
  if $input != nil {
    *$1 = swigCopyString(*$input)
  }
%}

}