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Fix fpcmp infinite loop when comparing "29-266" with "29-268".

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46455 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lauro Ramos Venancio 2008-01-28 18:23:23 +00:00
parent 349c72a35d
commit 599ddf9a76
1 changed files with 21 additions and 5 deletions
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26
lib/Support/FileUtilities.cpp
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@ -20,11 +20,15 @@
#include <cctype>
using namespace llvm;
static bool isNumberChar(char C) {
static bool isSignedChar(char C) {
if (C == '+' || C == '-')
return true;
else
return false;
}
static bool isExpoentChar(char C) {
switch (C) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '.': case '+': case '-':
case 'D': // Strange exponential notation.
case 'd': // Strange exponential notation.
case 'e':
@ -33,13 +37,25 @@ static bool isNumberChar(char C) {
}
}
static bool isNumberChar(char C) {
switch (C) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '.': return true;
default: return isSignedChar(C) || isExpoentChar(C);
}
}
static char *BackupNumber(char *Pos, char *FirstChar) {
// If we didn't stop in the middle of a number, don't backup.
if (!isNumberChar(*Pos)) return Pos;
// Otherwise, return to the start of the number.
while (Pos > FirstChar && isNumberChar(Pos[-1]))
while (Pos > FirstChar && isNumberChar(Pos[-1])) {
--Pos;
if (Pos > FirstChar && isSignedChar(Pos[0]) && !isExpoentChar(Pos[-1]))
break;
}
return Pos;
}