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Implement ConstantArray::isString

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10851 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-14 17:06:38 +00:00
parent 9b0a5ee5bb
commit 13cfdea1ef
1 changed files with 16 additions and 3 deletions
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19
lib/VMCore/Constants.cpp
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@ -754,14 +754,27 @@ ConstantArray *ConstantArray::get(const std::string &Str) {
return ConstantArray::get(ATy, ElementVals);
}
/// isString - This method returns true if the array is an array of sbyte or
/// ubyte, and if the elements of the array are all ConstantInt's.
bool ConstantArray::isString() const {
// Check the element type for sbyte or ubyte...
if (getType()->getElementType() != Type::UByteTy ||
getType()->getElementType() != Type::SByteTy)
return false;
// Check the elements to make sure they are all integers, not constant
// expressions.
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
if (!isa<ConstantInt>(getOperand(i)))
return false;
return true;
}
// getAsString - If the sub-element type of this array is either sbyte or ubyte,
// then this method converts the array to an std::string and returns it.
// Otherwise, it asserts out.
//
std::string ConstantArray::getAsString() const {
assert((getType()->getElementType() == Type::UByteTy ||
getType()->getElementType() == Type::SByteTy) && "Not a string!");
assert(isString() && "Not a string!");
std::string Result;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
Result += (char)cast<ConstantInt>(getOperand(i))->getRawValue();