mirror of
https://github.com/MaskRay/ccls.git
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134 lines
3.6 KiB
C++
134 lines
3.6 KiB
C++
/* Copyright 2017-2018 ccls Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include "utils.hh"
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#include "log.hh"
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#include "platform.hh"
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#include <siphash.h>
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#include <llvm/ADT/StringRef.h>
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#include <llvm/Support/FileSystem.h>
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#include <llvm/Support/Path.h>
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using namespace llvm;
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#include <algorithm>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <functional>
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#include <string.h>
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#include <unordered_map>
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namespace ccls {
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uint64_t HashUsr(llvm::StringRef s) {
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union {
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uint64_t ret;
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uint8_t out[8];
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};
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// k is an arbitrary key. Don't change it.
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const uint8_t k[16] = {0xd0, 0xe5, 0x4d, 0x61, 0x74, 0x63, 0x68, 0x52,
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0x61, 0x79, 0xea, 0x70, 0xca, 0x70, 0xf0, 0x0d};
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(void)siphash(reinterpret_cast<const uint8_t *>(s.data()), s.size(), k, out,
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8);
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return ret;
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}
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std::string LowerPathIfInsensitive(const std::string &path) {
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#if defined(_WIN32)
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std::string ret = path;
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for (char &c : ret)
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c = tolower(c);
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return ret;
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#else
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return path;
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#endif
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}
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void EnsureEndsInSlash(std::string &path) {
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if (path.empty() || path[path.size() - 1] != '/')
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path += '/';
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}
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std::string EscapeFileName(std::string path) {
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bool slash = path.size() && path.back() == '/';
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for (char &c : path)
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if (c == '\\' || c == '/' || c == ':')
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c = '@';
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if (slash)
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path += '/';
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return path;
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}
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std::string ResolveIfRelative(const std::string &directory,
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const std::string &path) {
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if (sys::path::is_absolute(path))
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return path;
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SmallString<256> Ret;
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sys::path::append(Ret, directory, path);
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return NormalizePath(Ret.str());
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}
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std::optional<int64_t> LastWriteTime(const std::string &path) {
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sys::fs::file_status Status;
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if (sys::fs::status(path, Status))
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return {};
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return sys::toTimeT(Status.getLastModificationTime());
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}
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std::optional<std::string> ReadContent(const std::string &filename) {
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char buf[4096];
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std::string ret;
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FILE *f = fopen(filename.c_str(), "rb");
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if (!f)
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return {};
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size_t n;
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while ((n = fread(buf, 1, sizeof buf, f)) > 0)
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ret.append(buf, n);
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fclose(f);
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return ret;
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}
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void WriteToFile(const std::string &filename, const std::string &content) {
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FILE *f = fopen(filename.c_str(), "wb");
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if (!f ||
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(content.size() && fwrite(content.c_str(), content.size(), 1, f) != 1)) {
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LOG_S(ERROR) << "failed to write to " << filename << ' ' << strerror(errno);
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return;
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}
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fclose(f);
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}
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// Find discontinous |search| in |content|.
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// Return |found| and the count of skipped chars before found.
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int ReverseSubseqMatch(std::string_view pat, std::string_view text,
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int case_sensitivity) {
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if (case_sensitivity == 1)
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case_sensitivity = std::any_of(pat.begin(), pat.end(), isupper) ? 2 : 0;
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int j = pat.size();
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if (!j)
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return text.size();
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for (int i = text.size(); i--;)
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if ((case_sensitivity ? text[i] == pat[j - 1]
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: tolower(text[i]) == tolower(pat[j - 1])) &&
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!--j)
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return i;
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return -1;
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}
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std::string GetDefaultResourceDirectory() { return DEFAULT_RESOURCE_DIRECTORY; }
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}
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