CF_PRIVATE CFIndex __CFStringEncodingPlatformUnicodeToBytes(uint32_t encoding, uint32_t flags, const UniChar *characters, CFIndex numChars, CFIndex *usedCharLen, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
#if DEPLOYMENT_TARGET_WINDOWS
WORD dwFlags = 0;
CFIndex usedLen;
if ((kCFStringEncodingUTF7 != encoding) && (kCFStringEncodingGB_18030_2000 != encoding) && (0x0800 != (encoding & 0x0F00))) { // not UTF-7/GB18030/ISO-2022-*
dwFlags |= (flags & (kCFStringEncodingAllowLossyConversion|kCFStringEncodingSubstituteCombinings) ? WC_DEFAULTCHAR : 0);
dwFlags |= (flags & kCFStringEncodingComposeCombinings ? WC_COMPOSITECHECK : 0);
dwFlags |= (flags & kCFStringEncodingIgnoreCombinings ? WC_DISCARDNS : 0);
}
if ((usedLen = WideCharToMultiByte(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCWSTR)characters, numChars, (LPSTR)bytes, maxByteLen, NULL, NULL)) == 0) {
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
CPINFO cpInfo;
if (!GetCPInfo(CFStringConvertEncodingToWindowsCodepage(encoding), &cpInfo)) {
cpInfo.MaxCharSize = 1; // Is this right ???
}
if (cpInfo.MaxCharSize == 1) {
numChars = maxByteLen;
} else {
usedLen = WideCharToMultiByte(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCWSTR)characters, numChars, NULL, 0, NULL, NULL);
usedLen -= maxByteLen;
numChars = (numChars > usedLen ? numChars - usedLen : 1);
}
if (WideCharToMultiByte(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCWSTR)characters, numChars, (LPSTR)bytes, maxByteLen, NULL, NULL) == 0) {
if (usedCharLen) *usedCharLen = 0;
if (usedByteLen) *usedByteLen = 0;
} else {
CFIndex lastUsedLen = 0;
while ((usedLen = WideCharToMultiByte(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCWSTR)characters, ++numChars, (LPSTR)bytes, maxByteLen, NULL, NULL))) lastUsedLen = usedLen;
if (usedCharLen) *usedCharLen = (numChars - 1);
if (usedByteLen) *usedByteLen = lastUsedLen;
}
return kCFStringEncodingInsufficientOutputBufferLength;
} else {
return kCFStringEncodingInvalidInputStream;
}
} else {
if (usedCharLen) *usedCharLen = numChars;
if (usedByteLen) *usedByteLen = usedLen;
return kCFStringEncodingConversionSuccess;
}
#endif /* DEPLOYMENT_TARGET_WINDOWS */
return kCFStringEncodingConverterUnavailable;
}
CF_INLINE bool __CFIsPlatformConverterAvailable(int encoding) {
#if DEPLOYMENT_TARGET_WINDOWS
return (IsValidCodePage(CFStringConvertEncodingToWindowsCodepage(encoding)) ? true : false);
#else
return false;
#endif
}
CF_PRIVATE CFIndex __CFStringEncodingPlatformBytesToUnicode(uint32_t encoding, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, CFIndex *usedByteLen, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
#if DEPLOYMENT_TARGET_WINDOWS
WORD dwFlags = 0;
CFIndex usedLen;
if ((kCFStringEncodingUTF7 != encoding) && (kCFStringEncodingGB_18030_2000 != encoding) && (0x0800 != (encoding & 0x0F00))) { // not UTF-7/GB18030/ISO-2022-*
dwFlags |= (flags & (kCFStringEncodingAllowLossyConversion|kCFStringEncodingSubstituteCombinings) ? 0 : MB_ERR_INVALID_CHARS);
dwFlags |= (flags & (kCFStringEncodingUseCanonical|kCFStringEncodingUseHFSPlusCanonical) ? MB_COMPOSITE : MB_PRECOMPOSED);
}
if ((usedLen = MultiByteToWideChar(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCSTR)bytes, numBytes, (LPWSTR)characters, maxCharLen)) == 0) {
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
CPINFO cpInfo;
if (!GetCPInfo(CFStringConvertEncodingToWindowsCodepage(encoding), &cpInfo)) {
cpInfo.MaxCharSize = 1; // Is this right ???
}
if (cpInfo.MaxCharSize == 1) {
numBytes = maxCharLen;
} else {
usedLen = MultiByteToWideChar(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCSTR)bytes, numBytes, (LPWSTR)characters, maxCharLen);
usedLen -= maxCharLen;
numBytes = (numBytes > usedLen ? numBytes - usedLen : 1);
}
while ((usedLen = MultiByteToWideChar(CFStringConvertEncodingToWindowsCodepage(encoding), dwFlags, (LPCSTR)bytes, numBytes, (LPWSTR)characters, maxCharLen)) == 0) {
if ((--numBytes) == 0) break;
}
if (usedCharLen) *usedCharLen = usedLen;
if (usedByteLen) *usedByteLen = numBytes;
return kCFStringEncodingInsufficientOutputBufferLength;
} else {
return kCFStringEncodingInvalidInputStream;
}
} else {
if (usedCharLen) *usedCharLen = usedLen;
if (usedByteLen) *usedByteLen = numBytes;
return kCFStringEncodingConversionSuccess;
}
#endif /* DEPLOYMENT_TARGET_WINDOWS */
return kCFStringEncodingConverterUnavailable;
}
