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Use fileutilities instead of mmap directly

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13865 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-28 00:31:36 +00:00
parent fb777c270b
commit 531b802e13
1 changed files with 2 additions and 16 deletions
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18
utils/fpcmp/fpcmp.cpp
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@ -37,25 +37,11 @@ namespace {
/// 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) {