blob: 41cbbf36f38cb0d2833f5701394846cb77288a6d [file] [log] [blame]
//===- Strings.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lld/Common/Strings.h"
#include "lld/Common/ErrorHandler.h"
#include "lld/Common/LLVM.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/GlobPattern.h"
#include <algorithm>
#include <mutex>
#include <vector>
using namespace llvm;
using namespace lld;
SingleStringMatcher::SingleStringMatcher(StringRef Pattern) {
if (Pattern.size() > 2 && Pattern.starts_with("\"") &&
Pattern.ends_with("\"")) {
ExactMatch = true;
ExactPattern = Pattern.substr(1, Pattern.size() - 2);
} else {
Expected<GlobPattern> Glob = GlobPattern::create(Pattern);
if (!Glob) {
error(toString(Glob.takeError()) + ": " + Pattern);
return;
}
ExactMatch = false;
GlobPatternMatcher = *Glob;
}
}
bool SingleStringMatcher::match(StringRef s) const {
return ExactMatch ? (ExactPattern == s) : GlobPatternMatcher.match(s);
}
bool StringMatcher::match(StringRef s) const {
for (const SingleStringMatcher &pat : patterns)
if (pat.match(s))
return true;
return false;
}
// Converts a hex string (e.g. "deadbeef") to a vector.
SmallVector<uint8_t, 0> lld::parseHex(StringRef s) {
SmallVector<uint8_t, 0> hex;
while (!s.empty()) {
StringRef b = s.substr(0, 2);
s = s.substr(2);
uint8_t h;
if (!to_integer(b, h, 16)) {
error("not a hexadecimal value: " + b);
return {};
}
hex.push_back(h);
}
return hex;
}
// Returns true if S is valid as a C language identifier.
bool lld::isValidCIdentifier(StringRef s) {
return !s.empty() && !isDigit(s[0]) &&
llvm::all_of(s, [](char c) { return isAlnum(c) || c == '_'; });
}
// Write the contents of the a buffer to a file
void lld::saveBuffer(StringRef buffer, const Twine &path) {
std::error_code ec;
raw_fd_ostream os(path.str(), ec, sys::fs::OpenFlags::OF_None);
if (ec)
error("cannot create " + path + ": " + ec.message());
os << buffer;
}