Use fileutilities instead of mmap directly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13865 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/fpcmp/fpcmp.cpp b/utils/fpcmp/fpcmp.cpp
index 7e472d4..e7e318e 100644
--- a/utils/fpcmp/fpcmp.cpp
+++ b/utils/fpcmp/fpcmp.cpp
@@ -37,25 +37,11 @@
/// OpenFile - mmap the specified file into the address space for reading, and
/// return the length and address of the buffer.
static void OpenFile(const std::string &Filename, unsigned &Len, char* &BufPtr){
- int FD = open(Filename.c_str(), O_RDONLY);
- if (FD == -1 || (Len = getFileSize(Filename)) == ~0U) {
+ BufPtr = (char*)ReadFileIntoAddressSpace(Filename, Len);
+ if (BufPtr == 0) {
std::cerr << "Error: cannot open file '" << Filename << "'\n";
exit(2);
}
-
- // mmap in the file all at once...
- BufPtr = (char*)mmap(0, Len, PROT_READ, MAP_PRIVATE, FD, 0);
-
- if (BufPtr == (char*)MAP_FAILED) {
- std::cerr << "Error: cannot open file '" << Filename << "'\n";
- exit(2);
- }
-
- // If mmap decided that the files were empty, it might have returned a
- // null pointer. If so, make a new, fake pointer -- it shouldn't matter
- // what it contains, because Len is 0, and it should never be read.
- if (BufPtr == 0 && Len == 0)
- BufPtr = new char[1];
}
static bool isNumberChar(char C) {