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