Frontend: Add support for reading named pipes as the main file.
- The whole {File,Source}Manager is built around wanting to pre-determine the
size of files, so we can't fit this in naturally. Instead, we handle it like
we do STDIN, where we just replace the main file contents upfront.
llvm-svn: 167419
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index c6c5fb5..b858322 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -610,6 +610,19 @@
return false;
}
SourceMgr.createMainFileID(File, Kind);
+
+ // The natural SourceManager infrastructure can't currently handle named
+ // pipes, but we would at least like to accept them for the main
+ // file. Detect them here, read them with the more generic MemoryBuffer
+ // function, and simply override their contents as we do for STDIN.
+ if (File->isNamedPipe()) {
+ OwningPtr<llvm::MemoryBuffer> MB;
+ if (llvm::error_code ec = llvm::MemoryBuffer::getFile(InputFile, MB)) {
+ Diags.Report(diag::err_cannot_open_file) << InputFile << ec.message();
+ return false;
+ }
+ SourceMgr.overrideFileContents(File, MB.take());
+ }
} else {
OwningPtr<llvm::MemoryBuffer> SB;
if (llvm::MemoryBuffer::getSTDIN(SB)) {