1 files changed, 131 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/ConvertUTFWrapper.cpp b/contrib/llvm/lib/Support/ConvertUTFWrapper.cpp
new file mode 100644
index 0000000..e45335d
--- /dev/null
+++ b/contrib/llvm/lib/Support/ConvertUTFWrapper.cpp
@@ -0,0 +1,131 @@
+//===-- ConvertUTFWrapper.cpp - Wrap ConvertUTF.h with clang data types -----===
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/ConvertUTF.h"
+#include "llvm/Support/SwapByteOrder.h"
+#include <string>
+#include <vector>
+
+namespace llvm {
+
+bool ConvertUTF8toWide(unsigned WideCharWidth, llvm::StringRef Source,
+                       char *&ResultPtr, const UTF8 *&ErrorPtr) {
+  assert(WideCharWidth == 1 || WideCharWidth == 2 || WideCharWidth == 4);
+  ConversionResult result = conversionOK;
+  // Copy the character span over.
+  if (WideCharWidth == 1) {
+    const UTF8 *Pos = reinterpret_cast<const UTF8*>(Source.begin());
+    if (!isLegalUTF8String(&Pos, reinterpret_cast<const UTF8*>(Source.end()))) {
+      result = sourceIllegal;
+      ErrorPtr = Pos;
+    } else {
+      memcpy(ResultPtr, Source.data(), Source.size());
+      ResultPtr += Source.size();
+    }
+  } else if (WideCharWidth == 2) {
+    const UTF8 *sourceStart = (const UTF8*)Source.data();
+    // FIXME: Make the type of the result buffer correct instead of
+    // using reinterpret_cast.
+    UTF16 *targetStart = reinterpret_cast<UTF16*>(ResultPtr);
+    ConversionFlags flags = strictConversion;
+    result = ConvertUTF8toUTF16(
+        &sourceStart, sourceStart + Source.size(),
+        &targetStart, targetStart + 2*Source.size(), flags);
+    if (result == conversionOK)
+      ResultPtr = reinterpret_cast<char*>(targetStart);
+    else
+      ErrorPtr = sourceStart;
+  } else if (WideCharWidth == 4) {
+    const UTF8 *sourceStart = (const UTF8*)Source.data();
+    // FIXME: Make the type of the result buffer correct instead of
+    // using reinterpret_cast.
+    UTF32 *targetStart = reinterpret_cast<UTF32*>(ResultPtr);
+    ConversionFlags flags = strictConversion;
+    result = ConvertUTF8toUTF32(
+        &sourceStart, sourceStart + Source.size(),
+        &targetStart, targetStart + 4*Source.size(), flags);
+    if (result == conversionOK)
+      ResultPtr = reinterpret_cast<char*>(targetStart);
+    else
+      ErrorPtr = sourceStart;
+  }
+  assert((result != targetExhausted)
+         && "ConvertUTF8toUTFXX exhausted target buffer");
+  return result == conversionOK;
+}
+
+bool ConvertCodePointToUTF8(unsigned Source, char *&ResultPtr) {
+  const UTF32 *SourceStart = &Source;
+  const UTF32 *SourceEnd = SourceStart + 1;
+  UTF8 *TargetStart = reinterpret_cast<UTF8 *>(ResultPtr);
+  UTF8 *TargetEnd = TargetStart + 4;
+  ConversionResult CR = ConvertUTF32toUTF8(&SourceStart, SourceEnd,
+                                           &TargetStart, TargetEnd,
+                                           strictConversion);
+  if (CR != conversionOK)
+    return false;
+
+  ResultPtr = reinterpret_cast<char*>(TargetStart);
+  return true;
+}
+
+bool hasUTF16ByteOrderMark(ArrayRef<char> S) {
+  return (S.size() >= 2 &&
+          ((S[0] == '\xff' && S[1] == '\xfe') ||
+           (S[0] == '\xfe' && S[1] == '\xff')));
+}
+
+bool convertUTF16ToUTF8String(ArrayRef<char> SrcBytes, std::string &Out) {
+  assert(Out.empty());
+
+  // Error out on an uneven byte count.
+  if (SrcBytes.size() % 2)
+    return false;
+
+  // Avoid OOB by returning early on empty input.
+  if (SrcBytes.empty())
+    return true;
+
+  const UTF16 *Src = reinterpret_cast<const UTF16 *>(SrcBytes.begin());
+  const UTF16 *SrcEnd = reinterpret_cast<const UTF16 *>(SrcBytes.end());
+
+  // Byteswap if necessary.
+  std::vector<UTF16> ByteSwapped;
+  if (Src[0] == UNI_UTF16_BYTE_ORDER_MARK_SWAPPED) {
+    ByteSwapped.insert(ByteSwapped.end(), Src, SrcEnd);
+    for (unsigned I = 0, E = ByteSwapped.size(); I != E; ++I)
+      ByteSwapped[I] = llvm::sys::SwapByteOrder_16(ByteSwapped[I]);
+    Src = &ByteSwapped[0];
+    SrcEnd = &ByteSwapped[ByteSwapped.size() - 1] + 1;
+  }
+
+  // Skip the BOM for conversion.
+  if (Src[0] == UNI_UTF16_BYTE_ORDER_MARK_NATIVE)
+    Src++;
+
+  // Just allocate enough space up front.  We'll shrink it later.
+  Out.resize(SrcBytes.size() * UNI_MAX_UTF8_BYTES_PER_CODE_POINT);
+  UTF8 *Dst = reinterpret_cast<UTF8 *>(&Out[0]);
+  UTF8 *DstEnd = Dst + Out.size();
+
+  ConversionResult CR =
+      ConvertUTF16toUTF8(&Src, SrcEnd, &Dst, DstEnd, strictConversion);
+  assert(CR != targetExhausted);
+
+  if (CR != conversionOK) {
+    Out.clear();
+    return false;
+  }
+
+  Out.resize(reinterpret_cast<char *>(Dst) - &Out[0]);
+  return true;
+}
+
+} // end namespace llvm
+