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90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
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#include <inttypes.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fstream>
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#include <iterator>
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#include <string>
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#ifdef __APPLE__
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#include <mach-o/dyld.h>
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#endif
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include "file_util.h"
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namespace deno {
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bool ReadFileToString(const char* fn, std::string* contents) {
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std::ifstream file(fn, std::ios::binary);
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if (file.fail()) {
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return false;
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}
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contents->assign(std::istreambuf_iterator<char>{file}, {});
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return !file.fail();
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}
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std::string Basename(std::string const& filename) {
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for (auto it = filename.rbegin(); it != filename.rend(); ++it) {
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char ch = *it;
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if (ch == '\\' || ch == '/') {
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return std::string(it.base(), filename.end());
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}
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}
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return filename;
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}
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// Returns the directory component from a filename. The returned path always
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// ends with a slash. This function does not understand Windows drive letters.
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std::string Dirname(std::string const& filename) {
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for (auto it = filename.rbegin(); it != filename.rend(); ++it) {
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char ch = *it;
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if (ch == '\\' || ch == '/') {
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return std::string(filename.begin(), it.base());
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}
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}
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return std::string("./");
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}
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// Returns the full path the currently running executable.
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// This implementation is very basic. Caveats:
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// * OS X: fails if buffer is too small, does not retry with a bigger buffer.
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// * Windows: ANSI only, no unicode. Fails if path is longer than 260 chars.
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bool ExePath(std::string* path) {
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#ifdef _WIN32
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// Windows only.
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char exe_buf[MAX_PATH];
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DWORD len = GetModuleFileNameA(NULL, exe_buf, sizeof exe_buf);
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if (len == 0 || len == sizeof exe_buf) {
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return false;
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}
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#else
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#ifdef __APPLE__
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// OS X only.
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char link_buf[PATH_MAX * 2]; // Exe may be longer than MAX_PATH, says Apple.
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uint32_t len = sizeof link_buf;
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if (_NSGetExecutablePath(link_buf, &len) < 0) {
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return false;
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}
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#else
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// Linux only.
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static const char* link_buf = "/proc/self/exe";
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#endif
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// Linux and OS X.
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char exe_buf[PATH_MAX];
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char* r = realpath(link_buf, exe_buf);
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if (r == NULL) {
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return false;
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}
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#endif
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// All platforms.
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path->assign(exe_buf);
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return true;
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}
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} // namespace deno
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