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/*
* Rjb - Ruby <-> Java Bridge
* Copyright(c) 2004 Kuwashima
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* $Id: riconv.c 117 2010-06-04 12:16:25Z arton $
*/
#include "ruby.h"
#include "extconf.h"
#if defined _WIN32 || defined __CYGWIN__
#include <windows.h>
#endif
#if defined HAVE_NL_LANGINFO
#include <langinfo.h>
static const char* const NL_EUC_TABLE[] = { "EUC-JISX0213", "EUC-JP", "EUC-JP-MS" };
static const char* const NL_SJIS_TABLE[] = { "SHIFT_JIS", "SHIFT_JISX0213", "WINDOWS-31J" };
#endif
#if defined HAVE_SETLOCALE
#include <locale.h>
#endif
static const char* const LOCALE_EUC_TABLE[] = { "japanese", "ja_JP.eucJP", "japanese.euc", "ja_JP", "ja_JP.ujis" };
static const char* const LOCALE_SJIS_TABLE[] = { "japanese.sjis", "ja_JP.SJIS" };
static const char* const LOCALE_UTF8_TABLE[] = { "ja_JP.UTF-8", "ja_JP.utf8" };
#include "riconv.h"
static const char* const CS_EUCJP = "EUC-JP";
static const char* const CS_CP932 = "CP932";
static const char* const CS_SJIS = "SHIFT_JIS";
static const char* const CS_UTF8 = "UTF-8";
#if RJB_RUBY_VERSION_CODE < 190
static VALUE objIconvJ2R;
static VALUE objIconvR2J;
static const char* charcode; //is this necessary?
static char Kcode = '\0';
static int find_table(const char* const str, const char* const table[])
{
int i;
int size = sizeof(table) / sizeof(table[0]);
for (i = 0; i < size; ++i)
{
if (strstr(str, table[i])) return 1;
}
return 0;
}
#endif
#if RJB_RUBY_VERSION_CODE < 190
static const char* get_charcode_name_by_locale(const char* const name)
{
if (find_table(name, LOCALE_UTF8_TABLE))
return NULL;
else if (find_table(name, LOCALE_EUC_TABLE))
return CS_EUCJP;
else if (find_table(name, LOCALE_SJIS_TABLE))
return CS_SJIS;
else
return NULL;
}
/*
* Get better charcode name.
*/
static const char* get_charcode_name()
{
const char* result = NULL;
const char* lang = NULL;
switch(Kcode)
{
case 'E':
result = CS_EUCJP;
break;
case 'S':
#if defined _WIN32 || defined __CYGWIN__
result = CS_CP932;
#else
result = CS_SJIS;
#endif
break;
case 'U':
//as is.
break;
case 'N':
default:
#if defined _WIN32 || defined __CYGWIN__
if (932 == GetACP()) result = CS_CP932;
#elif defined HAVE_NL_LANGINFO
setlocale(LC_ALL, "C"); //initialize
lang = nl_langinfo(CODESET);
if (find_table(lang, NL_EUC_TABLE))
result = CS_EUCJP;
else if (find_table(lang, NL_SJIS_TABLE))
result = CS_SJIS;
#elif defined HAVE_SETLOCALE
setlocale(LC_ALL, "C"); //initialize
result = get_charcode_name_by_locale(setlocale(LC_ALL, NULL));
#elif defined HAVE_GETENV
if (result = get_charcode_name_by_locale(getenv("LC_ALL")))
;
else if (result = get_charcode_name_by_locale(getenv("LC_CTYPE")))
;
else if (result = get_charcode_name_by_locale(getenv("LANG")))
;
#endif
break;
}
return result;
}
#endif
#if RJB_RUBY_VERSION_CODE < 190
static void reinit()
{
charcode = get_charcode_name();
if (charcode)
{
VALUE rb_iconv_klass = rb_const_get(rb_cObject, rb_intern("Iconv"));
if (RTEST(rb_iconv_klass)) {
ID sym_new = rb_intern("new");
rb_gc_unregister_address(&objIconvR2J);
objIconvR2J = rb_funcall(rb_iconv_klass, sym_new, 2, rb_str_new2(CS_UTF8), rb_str_new2(charcode));
rb_gc_register_address(&objIconvR2J);
rb_gc_unregister_address(&objIconvJ2R);
objIconvJ2R = rb_funcall(rb_iconv_klass, sym_new, 2, rb_str_new2(charcode), rb_str_new2(CS_UTF8));
rb_gc_register_address(&objIconvJ2R);
}
}
else
{
objIconvR2J = objIconvJ2R = Qnil;
}
}
#endif
#if RJB_RUBY_VERSION_CODE < 190
static void check_kcode()
{
VALUE rb_iconv_klass = rb_const_get(rb_cObject, rb_intern("Iconv"));
VALUE kcode = rb_gv_get("$KCODE");
if (RTEST(rb_iconv_klass) && TYPE(kcode) == T_STRING) {
char* kcodep = StringValuePtr(kcode);
char upper_kcode = toupper(*kcodep);
if (Kcode != upper_kcode)
{
Kcode = upper_kcode;
reinit();
}
}
else
{
objIconvR2J = objIconvJ2R = Qnil;
}
}
#endif
#if defined(DEBUG)
static void debug_out(VALUE v)
{
char* p = StringValuePtr(v);
printf("-- %d, %d, %s\n", rb_num2long(rb_funcall(v, rb_intern("size"), 0)),
strlen(p), p);
fflush(stdout);
}
#endif
VALUE exticonv_local_to_utf8(VALUE local_string)
{
#if RJB_RUBY_VERSION_CODE < 190
check_kcode();
if(RTEST(objIconvR2J))
{
return rb_funcall(objIconvR2J, rb_intern("iconv"), 1, local_string);
}
else
{
return local_string;
}
#else
VALUE cEncoding, encoding, utf8;
cEncoding = rb_const_get(rb_cObject, rb_intern("Encoding"));
encoding = rb_funcall(local_string, rb_intern("encoding"), 0);
utf8 = rb_const_get(cEncoding, rb_intern("UTF_8"));
if (encoding != utf8)
{
VALUE ret = rb_funcall(local_string, rb_intern("encode"), 2, utf8, encoding);
#if defined(DEBUG)
debug_out(local_string);
debug_out(ret);
#endif
return ret;
}
else
{
return local_string;
}
#endif
}
VALUE exticonv_utf8_to_local(VALUE utf8_string)
{
#if RJB_RUBY_VERSION_CODE < 190
check_kcode();
if(RTEST(objIconvR2J))
{
return rb_funcall(objIconvJ2R, rb_intern("iconv"), 1, utf8_string);
}
else
{
return utf8_string;
}
#else
return rb_funcall(utf8_string, rb_intern("force_encoding"), 1, rb_const_get(rb_cEncoding, rb_intern("UTF_8")));
#endif
}
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