Ruby: localeinit.c Source File

Ruby 3.4.9p82 (2026-03-11 revision 76cca827ab52ab1d346a728f068d5b8da3e2952b)

localeinit.c
1/**********************************************************************
2
3 localeinit.c -
4
5 $Author$
6 created at: Thu Jul 11 22:09:57 JST 2013
7
8 Copyright (C) 2013 Yukihiro Matsumoto
9
10**********************************************************************/
11
12#include "ruby/encoding.h"
13#include "internal.h"
14#include "encindex.h"
15#ifdef __CYGWIN__
16#include <windows.h>
17#endif
18#ifdef HAVE_LANGINFO_H
19#include <langinfo.h>
20#endif
21
22#if defined _WIN32 || defined __CYGWIN__
23#define SIZEOF_CP_NAME ((sizeof(UINT) * 8 / 3) + 4)
24#define CP_FORMAT(buf, codepage) snprintf(buf, sizeof(buf), "CP%u", (codepage))
25
26extern UINT ruby_w32_codepage[2];
27#endif
28
29#ifndef NO_LOCALE_CHARMAP
30# if defined _WIN32 || defined __CYGWIN__ || defined HAVE_LANGINFO_H
31# define NO_LOCALE_CHARMAP 0
32# else
33# define NO_LOCALE_CHARMAP 1
34# endif
35#endif
36
37#if !NO_LOCALE_CHARMAP
38static VALUE
39locale_charmap(VALUE (*conv)(const char *))
40{
41 const char *codeset = 0;
42#if defined _WIN32 || defined __CYGWIN__
43 char cp[SIZEOF_CP_NAME];
44# ifdef __CYGWIN__
45 const char *nl_langinfo_codeset(void);
46 codeset = nl_langinfo_codeset();
47# endif
48 if (!codeset) {
49 UINT codepage = ruby_w32_codepage[0];
50 if (!codepage) codepage = GetConsoleCP();
51 if (!codepage) codepage = GetACP();
52 CP_FORMAT(cp, codepage);
53 codeset = cp;
54 }
55#elif defined HAVE_LANGINFO_H
56 codeset = nl_langinfo(CODESET);
57 ASSUME(codeset);
58#else
59# error locale_charmap() is not implemented
60#endif
61 return (*conv)(codeset);
62}
63#endif
64
65/*
66 * call-seq:
67 * Encoding.locale_charmap -> string
68 *
69 * Returns the locale charmap name.
70 * It returns nil if no appropriate information.
71 *
72 * Debian GNU/Linux
73 * LANG=C
74 * Encoding.locale_charmap #=> "ANSI_X3.4-1968"
75 * LANG=ja_JP.EUC-JP
76 * Encoding.locale_charmap #=> "EUC-JP"
77 *
78 * SunOS 5
79 * LANG=C
80 * Encoding.locale_charmap #=> "646"
81 * LANG=ja
82 * Encoding.locale_charmap #=> "eucJP"
83 *
84 * The result is highly platform dependent.
85 * So Encoding.find(Encoding.locale_charmap) may cause an error.
86 * If you need some encoding object even for unknown locale,
87 * Encoding.find("locale") can be used.
88 *
89 */
90 VALUE
91rb_locale_charmap(VALUE klass)
92{
93#if NO_LOCALE_CHARMAP
94 return rb_usascii_str_new_cstr("US-ASCII");
95#else
96 return locale_charmap(rb_usascii_str_new_cstr);
97#endif
98}
99
100#if !NO_LOCALE_CHARMAP
101static VALUE
102enc_find_index(const char *name)
103{
104 return (VALUE)rb_enc_find_index(name);
105}
106#endif
107
108int
109rb_locale_charmap_index(void)
110{
111#if NO_LOCALE_CHARMAP
112 return ENCINDEX_US_ASCII;
113#else
114 return (int)locale_charmap(enc_find_index);
115#endif
116}
117
118int
119Init_enc_set_filesystem_encoding(void)
120{
121 int idx;
122#if NO_LOCALE_CHARMAP
123 idx = ENCINDEX_US_ASCII;
124#elif defined _WIN32
125 char cp[SIZEOF_CP_NAME];
126 const UINT codepage = ruby_w32_codepage[1];
127 if (!codepage) return ENCINDEX_UTF_8;
128 /* for debugging */
129 CP_FORMAT(cp, codepage);
130 idx = rb_enc_find_index(cp);
131 if (idx < 0) idx = ENCINDEX_ASCII_8BIT;
132#elif defined __CYGWIN__
133 idx = ENCINDEX_UTF_8;
134#else
135 idx = rb_enc_to_index(rb_default_external_encoding());
136#endif
137 return idx;
138}
ASSUME
#define ASSUME
Old name of RBIMPL_ASSUME.
Definition assume.h:27
encoding.h
Encoding relates APIs.
rb_locale_charmap
VALUE rb_locale_charmap(VALUE klass)
Returns a platform-depended "charmap" of the current locale.
Definition localeinit.c:91
rb_default_external_encoding
rb_encoding * rb_default_external_encoding(void)
Queries the "default external" encoding.
Definition encoding.c:1589
rb_usascii_str_new_cstr
#define rb_usascii_str_new_cstr(str)
Identical to rb_str_new_cstr, except it generates a string of "US ASCII" encoding.
Definition string.h:1567
VALUE
uintptr_t VALUE
Type that represents a Ruby object.
Definition value.h:40