mirror of https://github.com/bsnes-emu/bsnes.git
44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
#ifdef NALL_STRING_INTERNAL_HPP
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namespace nall {
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struct UTF8 {
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unsigned size; //size of encoded codepoint
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uint64_t data; //encoded codepoint
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unsigned codepoint; //decoded codepoint
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};
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inline UTF8 utf8_read(const char *s) {
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UTF8 utf8;
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if((*s & 0xfe) == 0xfc) utf8.size = 6;
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else if((*s & 0xfc) == 0xf8) utf8.size = 5;
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else if((*s & 0xf8) == 0xf0) utf8.size = 4;
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else if((*s & 0xf0) == 0xe0) utf8.size = 3;
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else if((*s & 0xe0) == 0xc0) utf8.size = 2;
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else utf8.size = 1;
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utf8.data = 0;
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for(unsigned n = 0; n < utf8.size; n++) {
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utf8.data = (utf8.data << 8) | (uint8_t)s[n];
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}
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static uint8_t mask[] = { 0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
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utf8.codepoint = s[0] & mask[utf8.size];
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for(unsigned n = 1; n < utf8.size; n++) {
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utf8.codepoint = (utf8.codepoint << 6) | (s[n] & 0x3f);
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}
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return utf8;
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}
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inline void utf8_write(char *s, const UTF8 &utf8) {
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for(signed n = utf8.size - 1, shift = 0; n >= 0; n--, shift += 8) {
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s[n] = utf8.data >> shift;
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}
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}
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}
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#endif
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