diff options
Diffstat (limited to 'clang/lib/Basic/SourceManager.cpp')
| -rw-r--r-- | clang/lib/Basic/SourceManager.cpp | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/clang/lib/Basic/SourceManager.cpp b/clang/lib/Basic/SourceManager.cpp index 58b9528..5f457d6 100644 --- a/clang/lib/Basic/SourceManager.cpp +++ b/clang/lib/Basic/SourceManager.cpp @@ -95,6 +95,29 @@ void ContentCache::replaceBuffer(const llvm::MemoryBuffer *B, bool DoNotFree) { Buffer.setInt((B && DoNotFree) ? DoNotFreeFlag : 0); } +const char *ContentCache::getInvalidBOM(StringRef BufStr) { + // If the buffer is valid, check to see if it has a UTF Byte Order Mark + // (BOM). We only support UTF-8 with and without a BOM right now. See + // http://en.wikipedia.org/wiki/Byte_order_mark for more information. + const char *InvalidBOM = + llvm::StringSwitch<const char *>(BufStr) + .StartsWith(llvm::StringLiteral::withInnerNUL("\x00\x00\xFE\xFF"), + "UTF-32 (BE)") + .StartsWith(llvm::StringLiteral::withInnerNUL("\xFF\xFE\x00\x00"), + "UTF-32 (LE)") + .StartsWith("\xFE\xFF", "UTF-16 (BE)") + .StartsWith("\xFF\xFE", "UTF-16 (LE)") + .StartsWith("\x2B\x2F\x76", "UTF-7") + .StartsWith("\xF7\x64\x4C", "UTF-1") + .StartsWith("\xDD\x73\x66\x73", "UTF-EBCDIC") + .StartsWith("\x0E\xFE\xFF", "SCSU") + .StartsWith("\xFB\xEE\x28", "BOCU-1") + .StartsWith("\x84\x31\x95\x33", "GB-18030") + .Default(nullptr); + + return InvalidBOM; +} + const llvm::MemoryBuffer *ContentCache::getBuffer(DiagnosticsEngine &Diag, FileManager &FM, SourceLocation Loc, @@ -190,20 +213,7 @@ const llvm::MemoryBuffer *ContentCache::getBuffer(DiagnosticsEngine &Diag, // (BOM). We only support UTF-8 with and without a BOM right now. See // http://en.wikipedia.org/wiki/Byte_order_mark for more information. StringRef BufStr = Buffer.getPointer()->getBuffer(); - const char *InvalidBOM = llvm::StringSwitch<const char *>(BufStr) - .StartsWith(llvm::StringLiteral::withInnerNUL("\x00\x00\xFE\xFF"), - "UTF-32 (BE)") - .StartsWith(llvm::StringLiteral::withInnerNUL("\xFF\xFE\x00\x00"), - "UTF-32 (LE)") - .StartsWith("\xFE\xFF", "UTF-16 (BE)") - .StartsWith("\xFF\xFE", "UTF-16 (LE)") - .StartsWith("\x2B\x2F\x76", "UTF-7") - .StartsWith("\xF7\x64\x4C", "UTF-1") - .StartsWith("\xDD\x73\x66\x73", "UTF-EBCDIC") - .StartsWith("\x0E\xFE\xFF", "SCSU") - .StartsWith("\xFB\xEE\x28", "BOCU-1") - .StartsWith("\x84\x31\x95\x33", "GB-18030") - .Default(nullptr); + const char *InvalidBOM = getInvalidBOM(BufStr); if (InvalidBOM) { Diag.Report(Loc, diag::err_unsupported_bom) |