810 lines
15 KiB
Go
810 lines
15 KiB
Go
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module os
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#include <sys/stat.h>
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#include <signal.h>
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#include <errno.h>
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//#include <execinfo.h> // for backtrace_symbols_fd
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/*
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struct dirent {
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d_ino int
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d_off int
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d_reclen u16
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d_type byte
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d_name [256]byte
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}
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*/
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struct C.dirent {
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d_name byteptr
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}
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fn C.readdir(voidptr) C.dirent
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const (
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args = []string
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MAX_PATH = 4096
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)
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struct C.FILE {
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}
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struct File {
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cfile *FILE
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}
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struct FileInfo {
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name string
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size int
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}
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import const (
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SEEK_SET
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SEEK_END
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SA_SIGINFO
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S_IFMT
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S_IFDIR
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SIGABRT
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SIGFPE
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SIGILL
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SIGINT
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SIGSEGV
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SIGTERM
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)
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struct C.stat {
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st_size int
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st_mode int
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st_mtime int
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}
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struct C.DIR {
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}
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//struct C.dirent {
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//d_name byteptr
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//}
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struct C.sigaction {
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mut:
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sa_mask int
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sa_sigaction int
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sa_flags int
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}
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fn C.getline(voidptr, voidptr, voidptr) int
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fn C.ftell(fp voidptr) int
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fn C.getenv(byteptr) byteptr
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fn C.sigaction(int, voidptr, int)
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fn todo_remove(){}
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fn init_os_args(argc int, argv *byteptr) []string {
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mut args := []string
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$if windows {
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mut args_list := &voidptr(0)
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mut args_count := 0
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args_list = C.CommandLineToArgvW(C.GetCommandLine(), &args_count)
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for i := 0; i < args_count; i++ {
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args << string_from_wide(&u16(args_list[i]))
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}
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C.LocalFree(args_list)
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} $else {
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for i := 0; i < argc; i++ {
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args << string(argv[i])
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}
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}
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return args
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}
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fn parse_windows_cmd_line(cmd byteptr) []string {
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s := string(cmd)
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return s.split(' ')
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}
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// read_file reads the file in `path` and returns the contents.
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pub fn read_file(path string) ?string {
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mode := 'rb'
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mut fp := &C.FILE{}
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$if windows {
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fp = C._wfopen(path.to_wide(), mode.to_wide())
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} $else {
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cpath := path.str
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fp = C.fopen(cpath, mode.str)
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}
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if isnil(fp) {
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return error('failed to open file "$path"')
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}
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C.fseek(fp, 0, SEEK_END)
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fsize := C.ftell(fp)
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// C.fseek(fp, 0, SEEK_SET) // same as `C.rewind(fp)` below
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C.rewind(fp)
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mut str := malloc(fsize + 1)
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C.fread(str, fsize, 1, fp)
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C.fclose(fp)
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str[fsize] = 0
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return string(str, fsize)
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}
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// file_size returns the size of the file located in `path`.
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pub fn file_size(path string) int {
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mut s := C.stat{}
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$if windows {
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C._wstat(path.to_wide(), &s)
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} $else {
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C.stat(path.str, &s)
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}
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return s.st_size
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}
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pub fn mv(old, new string) {
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$if windows {
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C._wrename(old.to_wide(), new.to_wide())
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} $else {
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C.rename(old.str, new.str)
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}
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}
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// read_lines reads the file in `path` into an array of lines.
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// TODO return `?[]string` TODO implement `?[]` support
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pub fn read_lines(path string) []string {
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mut res := []string
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mut buf_len := 1024
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mut buf := malloc(buf_len)
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mode := 'rb'
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mut fp := &C.FILE{}
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$if windows {
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fp = C._wfopen(path.to_wide(), mode.to_wide())
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} $else {
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fp = C.fopen(path.str, mode.str)
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}
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if isnil(fp) {
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// TODO
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// return error('failed to open file "$path"')
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return res
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}
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mut buf_index := 0
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for C.fgets(buf + buf_index, buf_len - buf_index, fp) != 0 {
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len := C.strlen(buf)
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if len == buf_len - 1 && buf[len - 1] != 10 {
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buf_len *= 2
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buf = C.realloc(buf, buf_len)
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if isnil(buf) {
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panic('Could not reallocate the read buffer')
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}
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buf_index = len
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continue
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}
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if buf[len - 1] == 10 || buf[len - 1] == 13 {
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buf[len - 1] = `\0`
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}
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if len > 1 && buf[len - 2] == 13 {
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buf[len - 2] = `\0`
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}
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res << tos_clone(buf)
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buf_index = 0
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}
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C.fclose(fp)
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return res
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}
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fn read_ulines(path string) []ustring {
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lines := read_lines(path)
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// mut ulines := new_array(0, lines.len, sizeof(ustring))
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mut ulines := []ustring
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for myline in lines {
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// ulines[i] = ustr
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ulines << myline.ustring()
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}
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return ulines
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}
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pub fn open(path string) ?File {
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mut file := File{}
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$if windows {
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wpath := path.to_wide()
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mode := 'rb'
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file = File {
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cfile: C._wfopen(wpath, mode.to_wide())
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}
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} $else {
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cpath := path.str
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file = File {
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cfile: C.fopen(cpath, 'rb')
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}
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}
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if isnil(file.cfile) {
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return error('failed to open file "$path"')
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}
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return file
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}
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// create creates a file at a specified location and returns a writable `File` object.
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pub fn create(path string) ?File {
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mut file := File{}
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$if windows {
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wpath := path.replace('/', '\\').to_wide()
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mode := 'wb'
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file = File {
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cfile: C._wfopen(wpath, mode.to_wide())
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}
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} $else {
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cpath := path.str
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file = File {
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cfile: C.fopen(cpath, 'wb')
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}
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}
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if isnil(file.cfile) {
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return error('failed to create file "$path"')
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}
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return file
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}
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pub fn open_append(path string) ?File {
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mut file := File{}
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$if windows {
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wpath := path.replace('/', '\\').to_wide()
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mode := 'ab'
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file = File {
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cfile: C._wfopen(wpath, mode.to_wide())
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}
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} $else {
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cpath := path.str
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file = File {
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cfile: C.fopen(cpath, 'ab')
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}
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}
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if isnil(file.cfile) {
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return error('failed to create(append) file "$path"')
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}
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return file
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}
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pub fn (f File) write(s string) {
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C.fputs(s.str, f.cfile)
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// C.fwrite(s.str, 1, s.len, f.cfile)
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}
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// convert any value to []byte (LittleEndian) and write it
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// for example if we have write(7, 4), "07 00 00 00" gets written
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// write(0x1234, 2) => "34 12"
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pub fn (f File) write_bytes(data voidptr, size int) {
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C.fwrite(data, 1, size, f.cfile)
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}
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pub fn (f File) write_bytes_at(data voidptr, size, pos int) {
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C.fseek(f.cfile, pos, SEEK_SET)
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C.fwrite(data, 1, size, f.cfile)
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C.fseek(f.cfile, 0, SEEK_END)
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}
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pub fn (f File) writeln(s string) {
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// C.fwrite(s.str, 1, s.len, f.cfile)
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// ss := s.clone()
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// TODO perf
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C.fputs(s.str, f.cfile)
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// ss.free()
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C.fputs('\n', f.cfile)
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}
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pub fn (f File) flush() {
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C.fflush(f.cfile)
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}
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pub fn (f File) close() {
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C.fclose(f.cfile)
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}
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// system starts the specified command, waits for it to complete, and returns its code.
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fn popen(path string) *FILE {
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$if windows {
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mode := 'rb'
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wpath := path.to_wide()
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return C._wpopen(wpath, mode.to_wide())
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}
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$else {
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cpath := path.str
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return C.popen(cpath, 'r')
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}
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}
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fn pclose(f *FILE) int {
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$if windows {
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return C._pclose(f)
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}
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$else {
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return C.pclose(f)
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}
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}
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struct Result {
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pub:
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exit_code int
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output string
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//stderr string // TODO
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}
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// exec starts the specified command, waits for it to complete, and returns its output.
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pub fn exec(cmd string) ?Result {
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pcmd := '$cmd 2>&1'
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f := popen(pcmd)
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if isnil(f) {
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return error('exec("$cmd") failed')
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}
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buf := [1000]byte
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mut res := ''
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for C.fgets(buf, 1000, f) != 0 {
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res += tos(buf, strlen(buf))
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}
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res = res.trim_space()
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exit_code := pclose(f)/256
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//if exit_code != 0 {
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//return error(res)
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//}
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return Result {
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output: res
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exit_code: exit_code
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}
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}
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pub fn system(cmd string) int {
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mut ret := int(0)
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$if windows {
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ret = C._wsystem(cmd.to_wide())
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} $else {
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ret = C.system(cmd.str)
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}
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if ret == -1 {
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os.print_c_errno()
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}
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return ret
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}
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// `getenv` returns the value of the environment variable named by the key.
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pub fn getenv(key string) string {
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$if windows {
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s := C._wgetenv(key.to_wide())
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if isnil(s) {
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return ''
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}
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return string_from_wide(s)
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} $else {
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s := C.getenv(key.str)
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if isnil(s) {
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return ''
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}
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return string(s)
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}
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}
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pub fn setenv(name string, value string, overwrite bool) int {
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$if windows {
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format := '$name=$value'
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if overwrite {
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return C._putenv(format.str)
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}
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return -1
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}
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$else {
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return C.setenv(name.str, value.str, overwrite)
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}
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}
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pub fn unsetenv(name string) int {
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$if windows {
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format := '${name}='
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return C._putenv(format.str)
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}
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$else {
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return C.unsetenv(name.str)
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}
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}
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// file_exists returns true if `path` exists.
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pub fn file_exists(_path string) bool {
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$if windows {
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path := _path.replace('/', '\\')
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return C._waccess(path.to_wide(), 0) != -1
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} $else {
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return C.access(_path.str, 0 ) != -1
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}
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}
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// rm removes file in `path`.
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pub fn rm(path string) {
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$if windows {
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C._wremove(path.to_wide())
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}
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$else {
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C.remove(path.str)
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}
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// C.unlink(path.cstr())
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}
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// rmdir removes a specified directory.
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pub fn rmdir(path string) {
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$if !windows {
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C.rmdir(path.str)
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}
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$else {
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C.RemoveDirectory(path.to_wide())
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}
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}
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fn print_c_errno() {
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//C.printf('errno=%d err="%s"\n', errno, C.strerror(errno))
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}
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pub fn ext(path string) string {
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pos := path.last_index('.')
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if pos == -1 {
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return ''
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}
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return path.right(pos)
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}
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// dir returns all but the last element of path, typically the path's directory.
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pub fn dir(path string) string {
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if path == '.' {
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return getwd()
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}
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pos := path.last_index(PathSeparator)
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if pos == -1 {
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return '.'
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}
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return path.left(pos)
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}
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fn path_sans_ext(path string) string {
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pos := path.last_index('.')
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if pos == -1 {
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return path
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}
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return path.left(pos)
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}
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pub fn basedir(path string) string {
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pos := path.last_index('/')
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if pos == -1 {
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return path
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}
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return path.left(pos + 1)
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}
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pub fn filename(path string) string {
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return path.all_after('/')
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}
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// get_line returns a one-line string from stdin
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pub fn get_line() string {
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str := get_raw_line()
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$if windows {
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return str.trim_right('\r\n')
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}
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$else {
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return str.trim_right('\n')
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}
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}
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// get_raw_line returns a one-line string from stdin along with '\n' if there is any
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pub fn get_raw_line() string {
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$if windows {
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max := 512 // MAX_PATH * sizeof(wchar_t)
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buf := &u16(malloc(max*2))
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h_input := C.GetStdHandle(STD_INPUT_HANDLE)
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if h_input == INVALID_HANDLE_VALUE {
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panic('get_raw_line() error getting input handle.')
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}
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mut nr_chars := 0
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C.ReadConsole(h_input, buf, max, &nr_chars, 0)
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if nr_chars == 0 {
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return ''
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}
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return string_from_wide2(buf, nr_chars)
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}
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$else {
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//u64 is used because C.getline needs a size_t as second argument
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//Otherwise, it would cause a valgrind warning and may be dangerous
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//Malloc takes an int as argument so a cast has to be made
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max := u64(256)
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buf := malloc(int(max))
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nr_chars := C.getline(&buf, &max, stdin)
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if nr_chars == 0 {
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return ''
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}
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return string(buf, nr_chars)
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}
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}
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pub fn get_lines() []string {
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mut line := ''
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mut inputstr := []string
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for {
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line = get_line()
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if(line.len <= 0) {
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break
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}
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line = line.trim_space()
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inputstr << line
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}
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return inputstr
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}
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pub fn get_lines_joined() string {
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mut line := ''
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mut inputstr := ''
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for {
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line = get_line()
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if(line.len <= 0) {
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break
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}
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line = line.trim_space()
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inputstr += line
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}
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return inputstr
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}
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pub fn user_os() string {
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$if linux {
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return 'linux'
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}
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$if mac {
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return 'mac'
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}
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$if windows {
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return 'windows'
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}
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$if freebsd {
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return 'freebsd'
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}
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$if openbsd {
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return 'openbsd'
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}
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$if netbsd {
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return 'netbsd'
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}
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$if dragonfly {
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return 'dragonfly'
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}
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$if msvc {
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return 'windows'
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}
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return 'unknown'
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}
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// home_dir returns path to user's home directory.
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pub fn home_dir() string {
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mut home := os.getenv('HOME')
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$if windows {
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home = os.getenv('HOMEDRIVE')
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if home.len == 0 {
|
|
home = os.getenv('SYSTEMDRIVE')
|
|
}
|
|
mut homepath := os.getenv('HOMEPATH')
|
|
if homepath.len == 0 {
|
|
homepath = '\\Users\\' + os.getenv('USERNAME')
|
|
}
|
|
home += homepath
|
|
}
|
|
home += '/'
|
|
return home
|
|
}
|
|
|
|
// write_file writes `text` data to a file in `path`.
|
|
pub fn write_file(path, text string) {
|
|
f := os.create(path) or {
|
|
return
|
|
}
|
|
f.write(text)
|
|
f.close()
|
|
}
|
|
|
|
pub fn clear() {
|
|
C.printf('\x1b[2J')
|
|
C.printf('\x1b[H')
|
|
}
|
|
|
|
fn on_segfault(f voidptr) {
|
|
$if windows {
|
|
return
|
|
}
|
|
$if mac {
|
|
mut sa := C.sigaction{}
|
|
C.memset(&sa, 0, sizeof(sigaction))
|
|
C.sigemptyset(&sa.sa_mask)
|
|
sa.sa_sigaction = f
|
|
sa.sa_flags = SA_SIGINFO
|
|
C.sigaction(SIGSEGV, &sa, 0)
|
|
}
|
|
}
|
|
|
|
pub fn executable() string {
|
|
$if linux {
|
|
mut result := malloc(MAX_PATH)
|
|
count := int(C.readlink('/proc/self/exe', result, MAX_PATH ))
|
|
if count < 0 {
|
|
panic('error reading /proc/self/exe to get exe path')
|
|
}
|
|
return string(result, count)
|
|
}
|
|
$if windows {
|
|
max := 512
|
|
mut result := &u16(malloc(max*2)) // MAX_PATH * sizeof(wchar_t)
|
|
len := int(C.GetModuleFileName( 0, result, max ))
|
|
return string_from_wide2(result, len)
|
|
}
|
|
$if mac {
|
|
mut result := malloc(MAX_PATH)
|
|
pid := C.getpid()
|
|
ret := C.proc_pidpath (pid, result, MAX_PATH)
|
|
if ret <= 0 {
|
|
println('os.executable() failed')
|
|
return '.'
|
|
}
|
|
return string(result)
|
|
}
|
|
$if freebsd {
|
|
mut result := malloc(MAX_PATH)
|
|
mib := [1 /* CTL_KERN */, 14 /* KERN_PROC */, 12 /* KERN_PROC_PATHNAME */, -1]
|
|
size := MAX_PATH
|
|
C.sysctl(mib.data, 4, result, &size, 0, 0)
|
|
return string(result)
|
|
}
|
|
$if openbsd {
|
|
// "Sadly there is no way to get the full path of the executed file in OpenBSD."
|
|
// lol
|
|
return os.args[0]
|
|
}
|
|
$if netbsd {
|
|
mut result := malloc(MAX_PATH)
|
|
count := int(C.readlink('/proc/curproc/exe', result, MAX_PATH ))
|
|
if count < 0 {
|
|
panic('error reading /proc/curproc/exe to get exe path')
|
|
}
|
|
return string(result, count)
|
|
}
|
|
$if dragonfly {
|
|
mut result := malloc(MAX_PATH)
|
|
count := int(C.readlink('/proc/curproc/file', result, MAX_PATH ))
|
|
if count < 0 {
|
|
panic('error reading /proc/curproc/file to get exe path')
|
|
}
|
|
return string(result, count)
|
|
}
|
|
return '.'
|
|
}
|
|
|
|
pub fn is_dir(path string) bool {
|
|
$if windows {
|
|
return dir_exists(path)
|
|
//val := int(C.GetFileAttributes(path.to_wide()))
|
|
// Note: this return is broke (wrong). we have dir_exists already how will this differ?
|
|
//return (val &FILE_ATTRIBUTE_DIRECTORY) > 0
|
|
}
|
|
$else {
|
|
statbuf := C.stat{}
|
|
cstr := path.str
|
|
if C.stat(cstr, &statbuf) != 0 {
|
|
return false
|
|
}
|
|
// ref: https://code.woboq.org/gcc/include/sys/stat.h.html
|
|
return (statbuf.st_mode & S_IFMT) == S_IFDIR
|
|
}
|
|
}
|
|
|
|
pub fn chdir(path string) {
|
|
$if windows {
|
|
C._wchdir(path.to_wide())
|
|
}
|
|
$else {
|
|
C.chdir(path.str)
|
|
}
|
|
}
|
|
|
|
pub fn getwd() string {
|
|
$if windows {
|
|
max := 512 // MAX_PATH * sizeof(wchar_t)
|
|
buf := &u16(malloc(max*2))
|
|
if C._wgetcwd(buf, max) == 0 {
|
|
return ''
|
|
}
|
|
return string_from_wide(buf)
|
|
}
|
|
$else {
|
|
buf := malloc(512)
|
|
if C.getcwd(buf, 512) == 0 {
|
|
return ''
|
|
}
|
|
return string(buf)
|
|
}
|
|
}
|
|
|
|
// walk_ext returns a recursive list of all file paths ending with `ext`.
|
|
pub fn walk_ext(path, ext string) []string {
|
|
if !os.is_dir(path) {
|
|
return []string
|
|
}
|
|
mut files := os.ls(path)
|
|
mut res := []string
|
|
for i, file in files {
|
|
if file.starts_with('.') {
|
|
continue
|
|
}
|
|
p := path + '/' + file
|
|
if os.is_dir(p) {
|
|
res << walk_ext(p, ext)
|
|
}
|
|
else if file.ends_with(ext) {
|
|
res << p
|
|
}
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn signal(signum int, handler voidptr) {
|
|
C.signal(signum, handler)
|
|
}
|
|
|
|
pub fn fork() int {
|
|
$if !windows {
|
|
pid := C.fork()
|
|
return pid
|
|
}
|
|
panic('os.fork not supported in windows') // TODO
|
|
}
|
|
|
|
pub fn wait() int {
|
|
$if !windows {
|
|
pid := C.wait(0)
|
|
return pid
|
|
}
|
|
panic('os.wait not supported in windows') // TODO
|
|
}
|
|
|
|
pub fn file_last_mod_unix(path string) int {
|
|
attr := C.stat{}
|
|
//# struct stat attr;
|
|
C.stat(path.str, &attr)
|
|
//# stat(path.str, &attr);
|
|
return attr.st_mtime
|
|
//# return attr.st_mtime ;
|
|
}
|
|
|
|
|
|
fn log(s string) {
|
|
}
|
|
|
|
pub fn flush_stdout() {
|
|
C.fflush(stdout)
|
|
}
|
|
|
|
pub fn print_backtrace() {
|
|
/*
|
|
# void *buffer[100];
|
|
nptrs := 0
|
|
# nptrs = backtrace(buffer, 100);
|
|
# printf("%d!!\n", nptrs);
|
|
# backtrace_symbols_fd(buffer, nptrs, STDOUT_FILENO) ;
|
|
*/
|
|
}
|