forked from OSchip/llvm-project
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
//===-- ConvertUTFWrapper.cpp - Wrap ConvertUTF.h with clang data types -----===
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/ConvertUTF.h"
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namespace llvm {
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bool ConvertUTF8toWide(unsigned WideCharWidth, llvm::StringRef Source,
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char *&ResultPtr, const UTF8 *&ErrorPtr) {
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assert(WideCharWidth == 1 || WideCharWidth == 2 || WideCharWidth == 4);
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ConversionResult result = conversionOK;
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// Copy the character span over.
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if (WideCharWidth == 1) {
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const UTF8 *Pos = reinterpret_cast<const UTF8*>(Source.begin());
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if (!isLegalUTF8String(&Pos, reinterpret_cast<const UTF8*>(Source.end()))) {
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result = sourceIllegal;
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ErrorPtr = Pos;
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} else {
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memcpy(ResultPtr, Source.data(), Source.size());
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ResultPtr += Source.size();
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}
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} else if (WideCharWidth == 2) {
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const UTF8 *sourceStart = (const UTF8*)Source.data();
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// FIXME: Make the type of the result buffer correct instead of
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// using reinterpret_cast.
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UTF16 *targetStart = reinterpret_cast<UTF16*>(ResultPtr);
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ConversionFlags flags = strictConversion;
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result = ConvertUTF8toUTF16(
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&sourceStart, sourceStart + Source.size(),
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&targetStart, targetStart + 2*Source.size(), flags);
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if (result == conversionOK)
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ResultPtr = reinterpret_cast<char*>(targetStart);
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else
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ErrorPtr = sourceStart;
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} else if (WideCharWidth == 4) {
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const UTF8 *sourceStart = (const UTF8*)Source.data();
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// FIXME: Make the type of the result buffer correct instead of
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// using reinterpret_cast.
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UTF32 *targetStart = reinterpret_cast<UTF32*>(ResultPtr);
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ConversionFlags flags = strictConversion;
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result = ConvertUTF8toUTF32(
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&sourceStart, sourceStart + Source.size(),
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&targetStart, targetStart + 4*Source.size(), flags);
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if (result == conversionOK)
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ResultPtr = reinterpret_cast<char*>(targetStart);
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else
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ErrorPtr = sourceStart;
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}
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assert((result != targetExhausted)
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&& "ConvertUTF8toUTFXX exhausted target buffer");
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return result == conversionOK;
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}
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bool ConvertCodePointToUTF8(unsigned Source, char *&ResultPtr) {
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const UTF32 *SourceStart = &Source;
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const UTF32 *SourceEnd = SourceStart + 1;
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UTF8 *TargetStart = reinterpret_cast<UTF8 *>(ResultPtr);
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UTF8 *TargetEnd = TargetStart + 4;
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ConversionResult CR = ConvertUTF32toUTF8(&SourceStart, SourceEnd,
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&TargetStart, TargetEnd,
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strictConversion);
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if (CR != conversionOK)
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return false;
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ResultPtr = reinterpret_cast<char*>(TargetStart);
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return true;
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}
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} // end namespace llvm
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