mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
//===-- StringExtras.cpp - Implement the StringExtras header --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the StringExtras.h header
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
using namespace llvm;
|
|
|
|
/// StrInStrNoCase - Portable version of strcasestr. Locates the first
|
|
/// occurrence of string 's1' in string 's2', ignoring case. Returns
|
|
/// the offset of s2 in s1 or npos if s2 cannot be found.
|
|
StringRef::size_type llvm::StrInStrNoCase(StringRef s1, StringRef s2) {
|
|
size_t N = s2.size(), M = s1.size();
|
|
if (N > M)
|
|
return StringRef::npos;
|
|
for (size_t i = 0, e = M - N + 1; i != e; ++i)
|
|
if (s1.substr(i, N).equals_lower(s2))
|
|
return i;
|
|
return StringRef::npos;
|
|
}
|
|
|
|
/// getToken - This function extracts one token from source, ignoring any
|
|
/// leading characters that appear in the Delimiters string, and ending the
|
|
/// token at any of the characters that appear in the Delimiters string. If
|
|
/// there are no tokens in the source string, an empty string is returned.
|
|
/// The function returns a pair containing the extracted token and the
|
|
/// remaining tail string.
|
|
std::pair<StringRef, StringRef> llvm::getToken(StringRef Source,
|
|
StringRef Delimiters) {
|
|
// Figure out where the token starts.
|
|
StringRef::size_type Start = Source.find_first_not_of(Delimiters);
|
|
|
|
// Find the next occurrence of the delimiter.
|
|
StringRef::size_type End = Source.find_first_of(Delimiters, Start);
|
|
|
|
return std::make_pair(Source.slice(Start, End), Source.substr(End));
|
|
}
|
|
|
|
/// SplitString - Split up the specified string according to the specified
|
|
/// delimiters, appending the result fragments to the output list.
|
|
void llvm::SplitString(StringRef Source,
|
|
SmallVectorImpl<StringRef> &OutFragments,
|
|
StringRef Delimiters) {
|
|
std::pair<StringRef, StringRef> S = getToken(Source, Delimiters);
|
|
while (!S.first.empty()) {
|
|
OutFragments.push_back(S.first);
|
|
S = getToken(S.second, Delimiters);
|
|
}
|
|
}
|