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mmap of a zero length file returns null on some platforms, so hack around it.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2004-04-23 17:38:17 +00:00
parent b61fc83ecb
commit 6893eadc95
1 changed files with 6 additions and 0 deletions
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6
utils/fpcmp/fpcmp.cpp
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@ -50,6 +50,12 @@ static void OpenFile(const std::string &Filename, unsigned &Len, char* &BufPtr){
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) {