[Support] Add a function to check if a file resides locally.
Differential Revision: https://reviews.llvm.org/D30010
llvm-svn: 295768
diff --git a/llvm/lib/Support/MemoryBuffer.cpp b/llvm/lib/Support/MemoryBuffer.cpp
index a3a18c9..227e792 100644
--- a/llvm/lib/Support/MemoryBuffer.cpp
+++ b/llvm/lib/Support/MemoryBuffer.cpp
@@ -103,7 +103,7 @@
static ErrorOr<std::unique_ptr<MemoryBuffer>>
getFileAux(const Twine &Filename, int64_t FileSize, uint64_t MapSize,
- uint64_t Offset, bool RequiresNullTerminator, bool IsVolatileSize);
+ uint64_t Offset, bool RequiresNullTerminator, bool IsVolatile);
std::unique_ptr<MemoryBuffer>
MemoryBuffer::getMemBuffer(StringRef InputData, StringRef BufferName,
@@ -178,8 +178,8 @@
ErrorOr<std::unique_ptr<MemoryBuffer>>
MemoryBuffer::getFileSlice(const Twine &FilePath, uint64_t MapSize,
- uint64_t Offset) {
- return getFileAux(FilePath, -1, MapSize, Offset, false, false);
+ uint64_t Offset, bool IsVolatile) {
+ return getFileAux(FilePath, -1, MapSize, Offset, false, IsVolatile);
}
@@ -254,19 +254,19 @@
ErrorOr<std::unique_ptr<MemoryBuffer>>
MemoryBuffer::getFile(const Twine &Filename, int64_t FileSize,
- bool RequiresNullTerminator, bool IsVolatileSize) {
+ bool RequiresNullTerminator, bool IsVolatile) {
return getFileAux(Filename, FileSize, FileSize, 0,
- RequiresNullTerminator, IsVolatileSize);
+ RequiresNullTerminator, IsVolatile);
}
static ErrorOr<std::unique_ptr<MemoryBuffer>>
getOpenFileImpl(int FD, const Twine &Filename, uint64_t FileSize,
uint64_t MapSize, int64_t Offset, bool RequiresNullTerminator,
- bool IsVolatileSize);
+ bool IsVolatile);
static ErrorOr<std::unique_ptr<MemoryBuffer>>
getFileAux(const Twine &Filename, int64_t FileSize, uint64_t MapSize,
- uint64_t Offset, bool RequiresNullTerminator, bool IsVolatileSize) {
+ uint64_t Offset, bool RequiresNullTerminator, bool IsVolatile) {
int FD;
std::error_code EC = sys::fs::openFileForRead(Filename, FD);
if (EC)
@@ -274,7 +274,7 @@
ErrorOr<std::unique_ptr<MemoryBuffer>> Ret =
getOpenFileImpl(FD, Filename, FileSize, MapSize, Offset,
- RequiresNullTerminator, IsVolatileSize);
+ RequiresNullTerminator, IsVolatile);
close(FD);
return Ret;
}
@@ -285,11 +285,11 @@
off_t Offset,
bool RequiresNullTerminator,
int PageSize,
- bool IsVolatileSize) {
+ bool IsVolatile) {
// mmap may leave the buffer without null terminator if the file size changed
// by the time the last page is mapped in, so avoid it if the file size is
// likely to change.
- if (IsVolatileSize)
+ if (IsVolatile)
return false;
// We don't use mmap for small files because this can severely fragment our
@@ -300,7 +300,6 @@
if (!RequiresNullTerminator)
return true;
-
// 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.
// FIXME: this chunk of code is duplicated, but it avoids a fstat when
@@ -338,7 +337,7 @@
static ErrorOr<std::unique_ptr<MemoryBuffer>>
getOpenFileImpl(int FD, const Twine &Filename, uint64_t FileSize,
uint64_t MapSize, int64_t Offset, bool RequiresNullTerminator,
- bool IsVolatileSize) {
+ bool IsVolatile) {
static int PageSize = sys::Process::getPageSize();
// Default is to map the full file.
@@ -365,7 +364,7 @@
}
if (shouldUseMmap(FD, FileSize, MapSize, Offset, RequiresNullTerminator,
- PageSize, IsVolatileSize)) {
+ PageSize, IsVolatile)) {
std::error_code EC;
std::unique_ptr<MemoryBuffer> Result(
new (NamedBufferAlloc(Filename))
@@ -415,17 +414,16 @@
ErrorOr<std::unique_ptr<MemoryBuffer>>
MemoryBuffer::getOpenFile(int FD, const Twine &Filename, uint64_t FileSize,
- bool RequiresNullTerminator, bool IsVolatileSize) {
+ bool RequiresNullTerminator, bool IsVolatile) {
return getOpenFileImpl(FD, Filename, FileSize, FileSize, 0,
- RequiresNullTerminator, IsVolatileSize);
+ RequiresNullTerminator, IsVolatile);
}
ErrorOr<std::unique_ptr<MemoryBuffer>>
MemoryBuffer::getOpenFileSlice(int FD, const Twine &Filename, uint64_t MapSize,
- int64_t Offset) {
+ int64_t Offset, bool IsVolatile) {
assert(MapSize != uint64_t(-1));
- return getOpenFileImpl(FD, Filename, -1, MapSize, Offset, false,
- /*IsVolatileSize*/ false);
+ return getOpenFileImpl(FD, Filename, -1, MapSize, Offset, false, IsVolatile);
}
ErrorOr<std::unique_ptr<MemoryBuffer>> MemoryBuffer::getSTDIN() {