#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.
//===----------------------------------------------------------------------===//
/// GetNamedBuffer - Allocates a new MemoryBuffer with Name copied after it.
template <typename T>
-static T* GetNamedBuffer(StringRef Buffer, StringRef Name,
+static T *GetNamedBuffer(StringRef Buffer, StringRef Name,
bool RequiresNullTerminator) {
char *Mem = static_cast<char*>(operator new(sizeof(T) + Name.size() + 1));
CopyStringRef(Mem + sizeof(T), Name);
// The name is stored after the class itself.
return reinterpret_cast<const char*>(this + 1);
}
+
+ virtual BufferKind getBufferKind() const {
+ return MemoryBuffer_Malloc;
+ }
};
}
/// getMemBuffer - Open the specified memory range as a MemoryBuffer. Note
-/// that EndPtr[0] must be a null byte and be accessible!
+/// that InputData must be a null terminated if RequiresNullTerminator is true!
MemoryBuffer *MemoryBuffer::getMemBuffer(StringRef InputData,
StringRef BufferName,
bool RequiresNullTerminator) {
sys::Path::UnMapFilePages(reinterpret_cast<const char*>(RealStart),
RealSize);
}
+
+ virtual BufferKind getBufferKind() const {
+ return MemoryBuffer_MMap;
+ }
};
}
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.
#endif
int FD = ::open(Filename, OpenFlags);
- if (FD == -1) {
+ if (FD == -1)
return error_code(errno, posix_category());
- }
+
error_code ret = getOpenFile(FD, Filename, result, FileSize, FileSize,
0, RequiresNullTerminator);
close(FD);
error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
OwningPtr<MemoryBuffer> &result,
- size_t FileSize, size_t MapSize,
- off_t Offset,
+ uint64_t FileSize, uint64_t MapSize,
+ int64_t Offset,
bool RequiresNullTerminator) {
static int PageSize = sys::Process::GetPageSize();
// Default is to map the full file.
- if (MapSize == size_t(-1)) {
+ if (MapSize == uint64_t(-1)) {
// If we don't know the file size, use fstat to find out. fstat on an open
// file descriptor is cheaper than stat on a random path.
- if (FileSize == size_t(-1)) {
+ if (FileSize == uint64_t(-1)) {
struct stat FileInfo;
// TODO: This should use fstat64 when available.
if (fstat(FD, &FileInfo) == -1) {
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();
}