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Add From arguments to StringRef search functions, and tweak doxyments.

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Also, add unittests for find_first_of and find_first_not_of.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86770 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-11-11 00:28:53 +00:00
parent 253e9b2990
commit 64066bd8b5
3 changed files with 53 additions and 20 deletions
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33
lib/Support/StringRef.cpp
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@ -24,11 +24,11 @@ const size_t StringRef::npos;
///
/// \return - The index of the first occurence of \arg Str, or npos if not
/// found.
size_t StringRef::find(StringRef Str) const {
size_t StringRef::find(StringRef Str, size_t From) const {
size_t N = Str.size();
if (N > Length)
return npos;
for (size_t i = 0, e = Length - N + 1; i != e; ++i)
for (size_t e = Length - N + 1, i = std::min(From, e); i != e; ++i)
if (substr(i, N).equals(Str))
return i;
return npos;
@ -50,19 +50,34 @@ size_t StringRef::rfind(StringRef Str) const {
return npos;
}
/// find_first_of - Find the first character from the string 'Chars' in the
/// current string or return npos if not in string.
StringRef::size_type StringRef::find_first_of(StringRef Chars) const {
for (size_type i = 0, e = Length; i != e; ++i)
/// find_first_of - Find the first character in the string that is in \arg
/// Chars, or npos if not found.
///
/// Note: O(size() * Chars.size())
StringRef::size_type StringRef::find_first_of(StringRef Chars,
size_t From) const {
for (size_type i = std::min(From, Length), e = Length; i != e; ++i)
if (Chars.find(Data[i]) != npos)
return i;
return npos;
}
/// find_first_not_of - Find the first character in the string that is not
/// in the string 'Chars' or return npos if all are in string. Same as find.
StringRef::size_type StringRef::find_first_not_of(StringRef Chars) const {
for (size_type i = 0, e = Length; i != e; ++i)
/// \arg C or npos if not found.
StringRef::size_type StringRef::find_first_not_of(char C, size_t From) const {
for (size_type i = std::min(From, Length), e = Length; i != e; ++i)
if (Data[i] != C)
return i;
return npos;
}
/// find_first_not_of - Find the first character in the string that is not
/// in the string \arg Chars, or npos if not found.
///
/// Note: O(size() * Chars.size())
StringRef::size_type StringRef::find_first_not_of(StringRef Chars,
size_t From) const {
for (size_type i = std::min(From, Length), e = Length; i != e; ++i)
if (Chars.find(Data[i]) == npos)
return i;
return npos;