62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
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// utf by pietro gagliardi (andlabs) — https://github.com/andlabs/utf/
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// 10 november 2016
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <stdint.h>
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// if nElem == 0, assume the buffer has no upper limit and is '\0' terminated
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// otherwise, assume buffer is NOT '\0' terminated but is bounded by nElem *elements*
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extern size_t utf8EncodeRune(uint32_t rune, char *encoded);
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extern const char *utf8DecodeRune(const char *s, size_t nElem, uint32_t *rune);
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extern size_t utf16EncodeRune(uint32_t rune, uint16_t *encoded);
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extern const uint16_t *utf16DecodeRune(const uint16_t *s, size_t nElem, uint32_t *rune);
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extern size_t utf8RuneCount(const char *s, size_t nElem);
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extern size_t utf8UTF16Count(const char *s, size_t nElem);
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extern size_t utf16RuneCount(const uint16_t *s, size_t nElem);
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extern size_t utf16UTF8Count(const uint16_t *s, size_t nElem);
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#ifdef __cplusplus
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}
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// Provide overloads on Windows for using these functions with wchar_t and WCHAR when wchar_t is a keyword in C++ mode (the default).
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// Otherwise, you'd need to cast to pass a wchar_t pointer, WCHAR pointer, or equivalent to these functions.
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// We use __wchar_t to be independent of the setting; see https://blogs.msdn.microsoft.com/oldnewthing/20161201-00/?p=94836 (ironically posted one day after I initially wrote this code!).
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// TODO check this on MinGW-w64
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// TODO check this under /Wall
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// TODO C-style casts enough? or will that fail in /Wall?
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// TODO same for UniChar/unichar on Mac? if both are unsigned then we have nothing to worry about
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#if defined(_MSC_VER)
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inline size_t utf16EncodeRune(uint32_t rune, __wchar_t *encoded)
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{
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return utf16EncodeRune(rune, reinterpret_cast<uint16_t *>(encoded));
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}
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inline const __wchar_t *utf16DecodeRune(const __wchar_t *s, size_t nElem, uint32_t *rune)
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{
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const uint16_t *ret;
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ret = utf16DecodeRune(reinterpret_cast<const uint16_t *>(s), nElem, rune);
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return reinterpret_cast<const __wchar_t *>(ret);
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}
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inline size_t utf16RuneCount(const __wchar_t *s, size_t nElem)
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{
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return utf16RuneCount(reinterpret_cast<const uint16_t *>(s), nElem);
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}
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inline size_t utf16UTF8Count(const __wchar_t *s, size_t nElem)
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{
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return utf16UTF8Count(reinterpret_cast<const uint16_t *>(s), nElem);
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}
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#endif
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#endif
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