forked from OSchip/llvm-project
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
//===-- StringExtras.cpp - Implement the StringExtras header --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the StringExtras.h header
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringExtras.h"
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#include <cstring>
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using namespace llvm;
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/// getToken - This function extracts one token from source, ignoring any
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/// leading characters that appear in the Delimiters string, and ending the
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/// token at any of the characters that appear in the Delimiters string. If
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/// there are no tokens in the source string, an empty string is returned.
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/// The Source source string is updated in place to remove the returned string
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/// and any delimiter prefix from it.
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std::string llvm::getToken(std::string &Source, const char *Delimiters) {
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size_t NumDelimiters = std::strlen(Delimiters);
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// Figure out where the token starts.
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std::string::size_type Start =
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Source.find_first_not_of(Delimiters, 0, NumDelimiters);
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if (Start == std::string::npos) Start = Source.size();
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// Find the next occurance of the delimiter.
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std::string::size_type End =
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Source.find_first_of(Delimiters, Start, NumDelimiters);
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if (End == std::string::npos) End = Source.size();
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// Create the return token.
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std::string Result = std::string(Source.begin()+Start, Source.begin()+End);
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// Erase the token that we read in.
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Source.erase(Source.begin(), Source.begin()+End);
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return Result;
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}
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/// SplitString - Split up the specified string according to the specified
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/// delimiters, appending the result fragments to the output list.
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void llvm::SplitString(const std::string &Source,
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std::vector<std::string> &OutFragments,
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const char *Delimiters) {
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std::string S = Source;
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std::string S2 = getToken(S, Delimiters);
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while (!S2.empty()) {
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OutFragments.push_back(S2);
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S2 = getToken(S, Delimiters);
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}
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}
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