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fs/nls/nls_utf8.c
1.19 KB
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/* * Module for handling utf8 just like any other charset. * By Urban Widmark 2000 */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/nls.h> #include <linux/errno.h> static unsigned char identity[256]; static int uni2char(wchar_t uni, unsigned char *out, int boundlen) { int n; |
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if (boundlen <= 0) return -ENAMETOOLONG; n = utf32_to_utf8(uni, out, boundlen); if (n < 0) { |
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*out = '?'; return -EINVAL; } return n; } static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni) { int n; |
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unicode_t u; |
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n = utf8_to_utf32(rawstring, boundlen, &u); if (n < 0 || u > MAX_WCHAR_T) { |
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*uni = 0x003f; /* ? */ |
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return -EINVAL; |
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} |
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*uni = (wchar_t) u; |
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return n; } static struct nls_table table = { .charset = "utf8", .uni2char = uni2char, .char2uni = char2uni, .charset2lower = identity, /* no conversion */ .charset2upper = identity, |
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}; static int __init init_nls_utf8(void) { int i; for (i=0; i<256; i++) identity[i] = i; return register_nls(&table); } static void __exit exit_nls_utf8(void) { unregister_nls(&table); } module_init(init_nls_utf8) module_exit(exit_nls_utf8) MODULE_LICENSE("Dual BSD/GPL"); |