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unicode: add system charset detection

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2023-09-15 15:32:14 +02:00
parent bffb48c87d
commit fea0ed7754
1 changed files with 27 additions and 1 deletions
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28
include/stdex/unicode.hpp
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@ -1,4 +1,4 @@
/*
/*
SPDX-License-Identifier: MIT
Copyright © 2023 Amebis
*/
@ -329,6 +329,32 @@ namespace stdex
#endif
}
static charset_id system_charset()
{
#ifdef _WIN32
return static_cast<charset_id>(GetACP());
#else
const char* lctype = nl_langinfo(LC_CTYPE);
if (strcmp(lctype, "UTF-8") == 0) return charset_id::utf8;
if (strcmp(lctype, "UTF-16") == 0) return charset_id::utf16;
#if BYTE_ORDER == BIG_ENDIAN
if (strcmp(lctype, "UTF-16BE") == 0) return charset_id::utf16;
#else
if (strcmp(lctype, "UTF-16LE") == 0) return charset_id::utf16;
#endif
if (strcmp(lctype, "UTF-32") == 0) return charset_id::utf32;
#if BYTE_ORDER == BIG_ENDIAN
if (strcmp(lctype, "UTF-32BE") == 0) return charset_id::utf32;
#else
if (strcmp(lctype, "UTF-32LE") == 0) return charset_id::utf32;
#endif
if (strcmp(lctype, "CP1250") == 0) return charset_id::windows1250;
if (strcmp(lctype, "CP1251") == 0) return charset_id::windows1251;
if (strcmp(lctype, "CP1252") == 0) return charset_id::windows1252;
return charset_id::system;
#endif
}
#ifdef _WIN32
protected:
static UINT to_encoding(_In_ charset_id charset)