mirror of
https://github.com/MaskRay/ccls.git
synced 2024-11-27 01:51:57 +00:00
372 lines
9.8 KiB
C++
372 lines
9.8 KiB
C++
#include "utils.h"
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#include "platform.h"
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#include <tinydir.h>
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#include <loguru/loguru.hpp>
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#include <algorithm>
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#include <cassert>
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#include <cctype>
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#include <fstream>
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#include <functional>
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#include <iostream>
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#include <locale>
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#include <sstream>
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#include <unordered_map>
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#if !defined(__APPLE__)
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#include <sparsepp/spp_memory.h>
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#endif
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// See http://stackoverflow.com/a/217605
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void TrimStart(std::string& s) {
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s.erase(s.begin(),
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std::find_if(s.begin(), s.end(),
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std::not1(std::ptr_fun<int, int>(std::isspace))));
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}
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void TrimEnd(std::string& s) {
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s.erase(std::find_if(s.rbegin(), s.rend(),
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std::not1(std::ptr_fun<int, int>(std::isspace)))
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.base(),
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s.end());
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}
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void Trim(std::string& s) {
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TrimStart(s);
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TrimEnd(s);
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}
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// See http://stackoverflow.com/a/2072890
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bool EndsWith(const std::string& value, const std::string& ending) {
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if (ending.size() > value.size())
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return false;
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return std::equal(ending.rbegin(), ending.rend(), value.rbegin());
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}
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bool StartsWith(const std::string& value, const std::string& start) {
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if (start.size() > value.size())
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return false;
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return std::equal(start.begin(), start.end(), value.begin());
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}
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bool AnyStartsWith(const std::vector<std::string>& values,
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const std::string& start) {
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return std::any_of(
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std::begin(values), std::end(values),
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[&start](const std::string& value) { return StartsWith(value, start); });
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}
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bool StartsWithAny(const std::string& value,
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const std::vector<std::string>& startings) {
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return std::any_of(std::begin(startings), std::end(startings),
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[&value](const std::string& starting) {
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return StartsWith(value, starting);
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});
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}
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bool EndsWithAny(const std::string& value,
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const std::vector<std::string>& endings) {
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return std::any_of(
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std::begin(endings), std::end(endings),
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[&value](const std::string& ending) { return EndsWith(value, ending); });
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}
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// See http://stackoverflow.com/a/29752943
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std::string ReplaceAll(const std::string& source,
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const std::string& from,
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const std::string& to) {
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std::string result;
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result.reserve(source.length()); // avoids a few memory allocations
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std::string::size_type last_pos = 0;
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std::string::size_type find_pos;
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while (std::string::npos != (find_pos = source.find(from, last_pos))) {
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result.append(source, last_pos, find_pos - last_pos);
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result += to;
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last_pos = find_pos + from.length();
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}
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// Care for the rest after last occurrence
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result += source.substr(last_pos);
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return result;
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}
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std::vector<std::string> SplitString(const std::string& str,
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const std::string& delimiter) {
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// http://stackoverflow.com/a/13172514
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std::vector<std::string> strings;
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std::string::size_type pos = 0;
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std::string::size_type prev = 0;
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while ((pos = str.find(delimiter, prev)) != std::string::npos) {
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strings.push_back(str.substr(prev, pos - prev));
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prev = pos + 1;
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}
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// To get the last substring (or only, if delimiter is not found)
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strings.push_back(str.substr(prev));
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return strings;
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}
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std::string LowerPathIfCaseInsensitive(const std::string& path) {
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std::string result = path;
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#if defined(_WIN32)
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for (size_t i = 0; i < result.size(); ++i)
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result[i] = (char)tolower(result[i]);
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#endif
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return result;
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}
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static void GetFilesInFolderHelper(
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std::string folder,
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bool recursive,
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std::string output_prefix,
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const std::function<void(const std::string&)>& handler) {
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tinydir_dir dir;
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if (tinydir_open(&dir, folder.c_str()) == -1) {
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// perror("Error opening file");
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goto bail;
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}
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while (dir.has_next) {
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tinydir_file file;
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if (tinydir_readfile(&dir, &file) == -1) {
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// perror("Error getting file");
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goto bail;
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}
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// Skip all dot files.
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//
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// The nested ifs are intentional, branching order is subtle here.
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//
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// Note that in the future if we do support dot directories/files, we must
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// always ignore the '.' and '..' directories otherwise this will loop
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// infinitely.
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if (file.name[0] != '.') {
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if (file.is_dir) {
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if (recursive) {
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std::string child_dir = output_prefix + file.name + "/";
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if (!IsSymLink(child_dir))
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GetFilesInFolderHelper(file.path, true /*recursive*/, child_dir,
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handler);
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}
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} else {
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handler(output_prefix + file.name);
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}
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}
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if (tinydir_next(&dir) == -1) {
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perror("Error getting next file");
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goto bail;
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}
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}
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bail:
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tinydir_close(&dir);
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}
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std::vector<std::string> GetFilesInFolder(std::string folder,
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bool recursive,
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bool add_folder_to_path) {
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EnsureEndsInSlash(folder);
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std::vector<std::string> result;
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GetFilesInFolderHelper(
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folder, recursive, add_folder_to_path ? folder : "",
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[&result](const std::string& path) { result.push_back(path); });
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return result;
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}
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void GetFilesInFolder(std::string folder,
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bool recursive,
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bool add_folder_to_path,
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const std::function<void(const std::string&)>& handler) {
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EnsureEndsInSlash(folder);
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GetFilesInFolderHelper(folder, recursive, add_folder_to_path ? folder : "",
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handler);
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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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// http://stackoverflow.com/a/6089413
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std::istream& SafeGetline(std::istream& is, std::string& t) {
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t.clear();
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// The characters in the stream are read one-by-one using a std::streambuf.
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// That is faster than reading them one-by-one using the std::istream. Code
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// that uses streambuf this way must be guarded by a sentry object. The sentry
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// object performs various tasks, such as thread synchronization and updating
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// the stream state.
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std::istream::sentry se(is, true);
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std::streambuf* sb = is.rdbuf();
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for (;;) {
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bool had_r = false;
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int c = sb->sbumpc();
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switch (c) {
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case '\r':
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had_r = true;
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break;
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case '\n':
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return is;
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case EOF:
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// Also handle the case when the last line has no line ending
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if (t.empty())
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is.setstate(std::ios::eofbit);
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return is;
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default:
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if (had_r) {
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t += '\r';
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had_r = false;
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}
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t += (char)c;
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}
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}
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}
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optional<std::string> ReadContent(const std::string& filename) {
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std::ifstream cache;
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cache.open(filename);
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try {
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return std::string(std::istreambuf_iterator<char>(cache),
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std::istreambuf_iterator<char>());
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} catch (std::ios_base::failure&) {
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return nullopt;
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}
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}
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std::vector<std::string> ReadLines(std::string filename) {
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std::vector<std::string> result;
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std::ifstream input(filename);
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for (std::string line; SafeGetline(input, line);)
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result.push_back(line);
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return result;
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}
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std::vector<std::string> ToLines(const std::string& content,
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bool trim_whitespace) {
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std::vector<std::string> result;
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std::istringstream lines(content);
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std::string line;
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while (getline(lines, line)) {
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if (trim_whitespace)
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Trim(line);
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result.push_back(line);
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}
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return result;
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}
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std::unordered_map<std::string, std::string> ParseTestExpectation(
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std::string filename) {
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bool in_output = false;
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#if false
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#include "bar.h"
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void foo();
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/*
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// if no name is given assume to be this file name
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// no output section means we don't check that index.
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OUTPUT: bar.cc
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{}
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OUTPUT: bar.h
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{}
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*/
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#endif
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std::unordered_map<std::string, std::string> result;
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std::string active_output_filename;
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std::string active_output_contents;
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for (std::string line : ReadLines(filename)) {
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if (line == "*/")
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break;
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if (StartsWith(line, "OUTPUT:")) {
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if (in_output) {
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result[active_output_filename] = active_output_contents;
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}
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if (line.size() > 7)
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active_output_filename = line.substr(8);
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else
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active_output_filename = filename;
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active_output_contents = "";
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in_output = true;
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} else if (in_output)
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active_output_contents += line + "\r\n";
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}
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if (in_output)
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result[active_output_filename] = active_output_contents;
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return result;
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}
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void UpdateTestExpectation(const std::string& filename,
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const std::string& expectation,
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const std::string& actual) {
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// Read the entire file into a string.
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std::ifstream in(filename);
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std::string str;
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str.assign(std::istreambuf_iterator<char>(in),
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std::istreambuf_iterator<char>());
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in.close();
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// Replace expectation
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auto it = str.find(expectation);
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assert(it != std::string::npos);
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str.replace(it, expectation.size(), actual);
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// Write it back out.
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std::ofstream of(filename, std::ios::out | std::ios::trunc);
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of.write(str.c_str(), str.size());
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of.close();
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}
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void Fail(const std::string& message) {
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LOG_S(FATAL) << "Fatal error: " << message;
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std::exit(1);
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}
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void WriteToFile(const std::string& filename, const std::string& content) {
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std::ofstream file(filename);
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file << content;
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}
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float GetProcessMemoryUsedInMb() {
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#if defined(__APPLE__)
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return 0.f;
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#else
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const float kBytesToMb = 1000000;
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uint64_t memory_after = spp::GetProcessMemoryUsed();
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return memory_after / kBytesToMb;
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#endif
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}
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std::string FormatMicroseconds(long long microseconds) {
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long long milliseconds = microseconds / 1000;
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long long remaining = microseconds - milliseconds;
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// Only show two digits after the dot.
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while (remaining >= 100)
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remaining /= 10;
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return std::to_string(milliseconds) + "." + std::to_string(remaining) + "ms";
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}
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