#include "llvm/Support/MemoryBuffer.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallString.h"
+#include "llvm/Config/config.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Errno.h"
+#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include <sys/stat.h>
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
-#include <sys/uio.h>
#else
#include <io.h>
#endif
#include <fcntl.h>
using namespace llvm;
-namespace { const llvm::error_code success; }
-
//===----------------------------------------------------------------------===//
// MemoryBuffer implementation itself.
//===----------------------------------------------------------------------===//
OwningPtr<MemoryBuffer> &result,
int64_t FileSize,
bool RequiresNullTerminator) {
+ // First check that the "file" is not a directory
+ bool is_dir = false;
+ error_code err = sys::fs::is_directory(Filename, is_dir);
+ if (err)
+ return err;
+ if (is_dir)
+ return make_error_code(errc::is_a_directory);
+
int OpenFlags = O_RDONLY;
#ifdef O_BINARY
OpenFlags |= O_BINARY; // Open input file in binary mode on win32.
RealMapOffset)) {
result.reset(GetNamedBuffer<MemoryBufferMMapFile>(
StringRef(Pages + Delta, MapSize), Filename, RequiresNullTerminator));
- return success;
+ return error_code::success();
}
}
char *BufPtr = const_cast<char*>(SB->getBufferStart());
size_t BytesLeft = MapSize;
+#ifndef HAVE_PREAD
if (lseek(FD, Offset, SEEK_SET) == -1)
return error_code(errno, posix_category());
+#endif
while (BytesLeft) {
+#ifdef HAVE_PREAD
+ ssize_t NumRead = ::pread(FD, BufPtr, BytesLeft, MapSize-BytesLeft+Offset);
+#else
ssize_t NumRead = ::read(FD, BufPtr, BytesLeft);
+#endif
if (NumRead == -1) {
if (errno == EINTR)
continue;
// Error while reading.
return error_code(errno, posix_category());
- } else if (NumRead == 0) {
- // We hit EOF early, truncate and terminate buffer.
- Buf->BufferEnd = BufPtr;
- *BufPtr = 0;
- result.swap(SB);
- return success;
+ }
+ if (NumRead == 0) {
+ assert(0 && "We got inaccurate FileSize value or fstat reported an "
+ "invalid file size.");
+ *BufPtr = '\0'; // null-terminate at the actual size.
+ break;
}
BytesLeft -= NumRead;
BufPtr += NumRead;
}
result.swap(SB);
- return success;
+ return error_code::success();
}
//===----------------------------------------------------------------------===//
} while (ReadBytes != 0);
result.reset(getMemBufferCopy(Buffer, "<stdin>"));
- return success;
+ return error_code::success();
}