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ruby/localeinit.c

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/**********************************************************************
localeinit.c -
$Author$
created at: Thu Jul 11 22:09:57 JST 2013
Copyright (C) 2013 Yukihiro Matsumoto
**********************************************************************/
#include "ruby/encoding.h"
#include "internal.h"
#include "encindex.h"
#ifdef __CYGWIN__
#include <windows.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#if defined _WIN32 || defined __CYGWIN__
#define SIZEOF_CP_NAME ((sizeof(UINT) * 8 / 3) + 4)
#define CP_FORMAT(buf, codepage) snprintf(buf, sizeof(buf), "CP%u", (codepage))
extern UINT ruby_w32_codepage[2];
#endif
#ifndef NO_LOCALE_CHARMAP
# if defined _WIN32 || defined __CYGWIN__ || defined HAVE_LANGINFO_H
# define NO_LOCALE_CHARMAP 0
# else
# define NO_LOCALE_CHARMAP 1
# endif
#endif
#if !NO_LOCALE_CHARMAP
static VALUE
locale_charmap(VALUE (*conv)(const char *))
{
const char *codeset = 0;
#if defined _WIN32 || defined __CYGWIN__
char cp[SIZEOF_CP_NAME];
# ifdef __CYGWIN__
const char *nl_langinfo_codeset(void);
codeset = nl_langinfo_codeset();
# endif
if (!codeset) {
UINT codepage = ruby_w32_codepage[0];
if (!codepage) codepage = GetConsoleCP();
if (!codepage) codepage = GetACP();
CP_FORMAT(cp, codepage);
codeset = cp;
}
#elif defined HAVE_LANGINFO_H
codeset = nl_langinfo(CODESET);
ASSUME(codeset);
#else
# error locale_charmap() is not implemented
#endif
return (*conv)(codeset);
}
#endif
/*
* call-seq:
* Encoding.locale_charmap -> string
*
* Returns the locale charmap name.
* It returns nil if no appropriate information.
*
* Debian GNU/Linux
* LANG=C
* Encoding.locale_charmap #=> "ANSI_X3.4-1968"
* LANG=ja_JP.EUC-JP
* Encoding.locale_charmap #=> "EUC-JP"
*
* SunOS 5
* LANG=C
* Encoding.locale_charmap #=> "646"
* LANG=ja
* Encoding.locale_charmap #=> "eucJP"
*
* The result is highly platform dependent.
* So Encoding.find(Encoding.locale_charmap) may cause an error.
* If you need some encoding object even for unknown locale,
* Encoding.find("locale") can be used.
*
*/
VALUE
rb_locale_charmap(VALUE klass)
{
#if NO_LOCALE_CHARMAP
return rb_usascii_str_new_cstr("US-ASCII");
#else
return locale_charmap(rb_usascii_str_new_cstr);
#endif
}
#if !NO_LOCALE_CHARMAP
static VALUE
enc_find_index(const char *name)
{
return (VALUE)rb_enc_find_index(name);
}
#endif
int
rb_locale_charmap_index(void)
{
#if NO_LOCALE_CHARMAP
return ENCINDEX_US_ASCII;
#else
return (int)locale_charmap(enc_find_index);
#endif
}
int
Init_enc_set_filesystem_encoding(void)
{
int idx;
#if NO_LOCALE_CHARMAP
idx = ENCINDEX_US_ASCII;
#elif defined _WIN32
char cp[SIZEOF_CP_NAME];
const UINT codepage = ruby_w32_codepage[1];
if (!codepage) return ENCINDEX_UTF_8;
/* for debugging */
CP_FORMAT(cp, codepage);
idx = rb_enc_find_index(cp);
if (idx < 0) idx = ENCINDEX_ASCII_8BIT;
#elif defined __CYGWIN__
idx = ENCINDEX_UTF_8;
#else
idx = rb_enc_to_index(rb_default_external_encoding());
#endif
return idx;
}