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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
//===-- StringExtras.cpp - Implement the StringExtras header --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 "llvm/ADT/SmallVector.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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/// StrInStrNoCase - Portable version of strcasestr. Locates the first
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/// occurrence of string 's1' in string 's2', ignoring case. Returns
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/// the offset of s2 in s1 or npos if s2 cannot be found.
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StringRef::size_type llvm::StrInStrNoCase(StringRef s1, StringRef s2) {
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size_t N = s2.size(), M = s1.size();
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if (N > M)
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return StringRef::npos;
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for (size_t i = 0, e = M - N + 1; i != e; ++i)
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if (s1.substr(i, N).equals_lower(s2))
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return i;
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return StringRef::npos;
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}
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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 function returns a pair containing the extracted token and the
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/// remaining tail string.
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std::pair<StringRef, StringRef> llvm::getToken(StringRef Source,
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StringRef Delimiters) {
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// Figure out where the token starts.
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StringRef::size_type Start = Source.find_first_not_of(Delimiters);
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// Find the next occurrence of the delimiter.
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StringRef::size_type End = Source.find_first_of(Delimiters, Start);
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return std::make_pair(Source.slice(Start, End), Source.substr(End));
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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(StringRef Source,
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SmallVectorImpl<StringRef> &OutFragments,
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StringRef Delimiters) {
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std::pair<StringRef, StringRef> S = getToken(Source, Delimiters);
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while (!S.first.empty()) {
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OutFragments.push_back(S.first);
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S = getToken(S.second, Delimiters);
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}
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}
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void llvm::printEscapedString(StringRef Name, raw_ostream &Out) {
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for (unsigned i = 0, e = Name.size(); i != e; ++i) {
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unsigned char C = Name[i];
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if (isPrint(C) && C != '\\' && C != '"')
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Out << C;
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else
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Out << '\\' << hexdigit(C >> 4) << hexdigit(C & 0x0F);
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}
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}
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void llvm::printHTMLEscaped(StringRef String, raw_ostream &Out) {
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for (char C : String) {
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if (C == '&')
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Out << "&";
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else if (C == '<')
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Out << "<";
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else if (C == '>')
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Out << ">";
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else if (C == '\"')
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Out << """;
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else if (C == '\'')
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Out << "'";
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else
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Out << C;
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}
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}
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void llvm::printLowerCase(StringRef String, raw_ostream &Out) {
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for (const char C : String)
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Out << toLower(C);
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}
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