diff options
Diffstat (limited to 'lib/Basic/SourceManager.cpp')
| -rw-r--r-- | lib/Basic/SourceManager.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp index 053cfe333d..c76624139a 100644 --- a/lib/Basic/SourceManager.cpp +++ b/lib/Basic/SourceManager.cpp @@ -119,6 +119,41 @@ const llvm::MemoryBuffer *ContentCache::getBuffer(Diagnostic &Diag, Buffer.setInt(true); #endif } + + // If the buffer is valid, check to see if it has a UTF Byte Order Mark + // (BOM). We only support UTF-8 without a BOM right now. See + // http://en.wikipedia.org/wiki/Byte_order_mark for more information. + if (!Buffer.getInt()) { + llvm::StringRef BufStr = Buffer.getPointer()->getBuffer(); + const char *BOM = 0; + if (BufStr.startswith("\xFE\xBB\xBF")) + BOM = "UTF-8"; + else if (BufStr.startswith("\xFE\xFF")) + BOM = "UTF-16 (BE)"; + else if (BufStr.startswith("\xFF\xFE")) + BOM = "UTF-16 (LE)"; + else if (BufStr.startswith(llvm::StringRef("\x00\x00\xFE\xFF", 4))) + BOM = "UTF-32 (BE)"; + else if (BufStr.startswith(llvm::StringRef("\xFF\xFE\x00\x00", 4))) + BOM = "UTF-32 (LE)"; + else if (BufStr.startswith("\x2B\x2F\x76")) + BOM = "UTF-7"; + else if (BufStr.startswith("\xF7\x64\x4C")) + BOM = "UTF-1"; + else if (BufStr.startswith("\xDD\x73\x66\x73")) + BOM = "UTF-EBCDIC"; + else if (BufStr.startswith("\x0E\xFE\xFF")) + BOM = "SDSU"; + else if (BufStr.startswith("\xFB\xEE\x28")) + BOM = "BOCU-1"; + else if (BufStr.startswith("\x84\x31\x95\x33")) + BOM = "BOCU-1"; + + if (BOM) { + Diag.Report(diag::err_unsupported_bom) << BOM << Entry->getName(); + Buffer.setInt(1); + } + } } if (Invalid) |