| 1 | //===- Strings.cpp -------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "lld/Common/Strings.h" |
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| 10 | #include "lld/Common/ErrorHandler.h" |
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| 11 | #include "lld/Common/LLVM.h" |
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| 12 | #include "llvm/ADT/StringExtras.h" |
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| 13 | #include "llvm/Support/FileSystem.h" |
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| 14 | #include "llvm/Support/GlobPattern.h" |
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| 15 | #include <algorithm> |
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| 16 | #include <mutex> |
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| 17 | #include <vector> |
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| 18 | |
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| 19 | using namespace llvm; |
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| 20 | using namespace lld; |
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| 21 | |
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| 22 | static bool isExact(StringRef Pattern) { |
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| 23 | return Pattern.size() > 2 && Pattern.starts_with(Prefix: "\"" ) && |
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| 24 | Pattern.ends_with(Suffix: "\"" ); |
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| 25 | } |
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| 26 | |
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| 27 | SingleStringMatcher::SingleStringMatcher(StringRef Pattern) |
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| 28 | : ExactMatch(isExact(Pattern)) { |
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| 29 | if (ExactMatch) { |
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| 30 | ExactPattern = Pattern.substr(Start: 1, N: Pattern.size() - 2); |
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| 31 | } else { |
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| 32 | Expected<GlobPattern> Glob = GlobPattern::create(Pat: Pattern); |
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| 33 | if (!Glob) { |
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| 34 | error(msg: toString(E: Glob.takeError()) + ": " + Pattern); |
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| 35 | return; |
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| 36 | } |
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| 37 | GlobPatternMatcher = *Glob; |
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| 38 | } |
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| 39 | } |
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| 40 | |
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| 41 | bool SingleStringMatcher::match(StringRef s) const { |
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| 42 | return ExactMatch ? (ExactPattern == s) : GlobPatternMatcher.match(S: s); |
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| 43 | } |
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| 44 | |
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| 45 | bool StringMatcher::match(StringRef s) const { |
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| 46 | for (const SingleStringMatcher &pat : patterns) |
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| 47 | if (pat.match(s)) |
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| 48 | return true; |
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| 49 | return false; |
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| 50 | } |
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| 51 | |
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| 52 | // Converts a hex string (e.g. "deadbeef") to a vector. |
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| 53 | SmallVector<uint8_t, 0> lld::parseHex(StringRef s) { |
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| 54 | SmallVector<uint8_t, 0> hex; |
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| 55 | while (!s.empty()) { |
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| 56 | StringRef b = s.substr(Start: 0, N: 2); |
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| 57 | s = s.substr(Start: 2); |
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| 58 | uint8_t h; |
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| 59 | if (!to_integer(S: b, Num&: h, Base: 16)) { |
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| 60 | error(msg: "not a hexadecimal value: " + b); |
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| 61 | return {}; |
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| 62 | } |
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| 63 | hex.push_back(Elt: h); |
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| 64 | } |
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| 65 | return hex; |
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| 66 | } |
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| 67 | |
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| 68 | // Returns true if S is valid as a C language identifier. |
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| 69 | bool lld::isValidCIdentifier(StringRef s) { |
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| 70 | return !s.empty() && !isDigit(C: s[0]) && |
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| 71 | llvm::all_of(Range&: s, P: [](char c) { return isAlnum(C: c) || c == '_'; }); |
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| 72 | } |
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| 73 | |
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| 74 | // Write the contents of the a buffer to a file |
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| 75 | void lld::saveBuffer(StringRef buffer, const Twine &path) { |
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| 76 | std::error_code ec; |
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| 77 | raw_fd_ostream os(path.str(), ec, sys::fs::OpenFlags::OF_None); |
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| 78 | if (ec) |
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| 79 | error(msg: "cannot create " + path + ": " + ec.message()); |
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| 80 | os << buffer; |
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| 81 | } |
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| 82 | |
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