1 //===- Strings.cpp -------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "lld/Common/Strings.h" 10 #include "lld/Common/ErrorHandler.h" 11 #include "lld/Common/LLVM.h" 12 #include "llvm/ADT/StringExtras.h" 13 #include "llvm/Support/FileSystem.h" 14 #include "llvm/Support/GlobPattern.h" 15 #include <algorithm> 16 #include <mutex> 17 #include <vector> 18 19 using namespace llvm; 20 using namespace lld; 21 22 SingleStringMatcher::SingleStringMatcher(StringRef Pattern) { 23 if (Pattern.size() > 2 && Pattern.starts_with("\"") && 24 Pattern.ends_with("\"")) { 25 ExactMatch = true; 26 ExactPattern = Pattern.substr(1, Pattern.size() - 2); 27 } else { 28 Expected<GlobPattern> Glob = GlobPattern::create(Pattern); 29 if (!Glob) { 30 error(toString(Glob.takeError())); 31 return; 32 } 33 ExactMatch = false; 34 GlobPatternMatcher = *Glob; 35 } 36 } 37 38 bool SingleStringMatcher::match(StringRef s) const { 39 return ExactMatch ? (ExactPattern == s) : GlobPatternMatcher.match(s); 40 } 41 42 bool StringMatcher::match(StringRef s) const { 43 for (const SingleStringMatcher &pat : patterns) 44 if (pat.match(s)) 45 return true; 46 return false; 47 } 48 49 // Converts a hex string (e.g. "deadbeef") to a vector. 50 SmallVector<uint8_t, 0> lld::parseHex(StringRef s) { 51 SmallVector<uint8_t, 0> hex; 52 while (!s.empty()) { 53 StringRef b = s.substr(0, 2); 54 s = s.substr(2); 55 uint8_t h; 56 if (!to_integer(b, h, 16)) { 57 error("not a hexadecimal value: " + b); 58 return {}; 59 } 60 hex.push_back(h); 61 } 62 return hex; 63 } 64 65 // Returns true if S is valid as a C language identifier. 66 bool lld::isValidCIdentifier(StringRef s) { 67 return !s.empty() && !isDigit(s[0]) && 68 llvm::all_of(s, [](char c) { return isAlnum(c) || c == '_'; }); 69 } 70 71 // Write the contents of the a buffer to a file 72 void lld::saveBuffer(StringRef buffer, const Twine &path) { 73 std::error_code ec; 74 raw_fd_ostream os(path.str(), ec, sys::fs::OpenFlags::OF_None); 75 if (ec) 76 error("cannot create " + path + ": " + ec.message()); 77 os << buffer; 78 } 79