mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
473 lines
8.8 KiB
Go
473 lines
8.8 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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const (
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args = []string
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)
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struct 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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)
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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 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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# char** argv = (char**) _argv;
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for i := 0; i < argc; i++ {
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arg := ''
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//arg := tos(argv[i], strlen(argv[i]))
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# arg = tos((char**)(argv[i]), strlen((char**)(argv[i])));
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args << arg
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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 := tos2(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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mut res := ''
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cpath := path.cstr()
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fp := C.fopen(cpath, 'r')
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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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res = tos(str, fsize)
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return res
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}
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/*
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// TODO
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fn (f File) read_rune() string {
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# if (!f.cfile) return tos("", 0);
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c := malloc(1)
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C.fread(c, 1, 1, f.cfile)
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return tos(c, 1)
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}
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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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# struct stat s;
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# stat(path.str, &s);
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// # if (S_ISLNK(s.st_mode)) return -1;
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# return s.st_size;
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// //////////////////////
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# FILE *f = fopen(path.str, "r");
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# if (!f) return 0;
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# fseek(f, 0, SEEK_END);
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# long fsize = ftell(f);
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// # fseek(f, 0, SEEK_SET); //same as rewind(f);
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# rewind(f);
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# return fsize;
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return 0
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}
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pub fn mv(old, new string) {
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C.rename(old.cstr(), new.cstr())
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}
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/*
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pub fn file_last_mod_unix(path string) int {
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# struct stat attr;
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# stat(path.str, &attr);
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# return attr.st_mtime ;
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return 0
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}
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pub fn file_last_mod_time(path string) time.Time {
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return time.now()
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q := C.tm{}
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# struct stat attr;
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# stat(path.str, &attr);
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// # q = attr.st_mtime;
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# struct tm * now = localtime(&attr.st_mtime);
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# q = *now;
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# printf("Last modified time: %s", ctime(&attr.st_mtime));
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return time.convert_ctime(q)
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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 := [1000]byte
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cpath := path.cstr()
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fp := C.fopen(cpath, 'rb')
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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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for C.fgets(buf, 1000, fp) != 0 {
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mut val := ''
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buf[C.strlen(buf) - 1] = `\0` // eat the newline fgets() stores
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$if windows {
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if buf[strlen(buf)-2] == 13 {
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buf[strlen(buf) - 2] = `\0`
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}
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}
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res << tos_clone(buf)
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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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/*
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struct Reader {
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fp *FILE
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}
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*/
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// fn open(file string) File? {
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// return open_file(file)
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// }
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pub fn open(path string) File {
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return open_file(path)
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}
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fn open_file(file string) File {
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return create_file2(file, 'r')
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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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return create_file(path)
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}
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pub fn open_append(path string) File {
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return create_file(path)
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}
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// TODO remove
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fn create_file(file string) File {
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return create_file2(file, 'w')
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}
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fn create_file_a(file string) File {
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return create_file2(file, 'a')
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}
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fn open_file_a(file string) File {
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return create_file2(file, 'a')
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}
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fn create_file2(file, mode string) File {
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res := File {
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cfile: C.fopen(file.cstr(), mode.cstr())
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}
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if isnil(res.cfile) {
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println('coudlnt create file "$file"')
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}
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return res
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}
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fn (f File) append(s string) {
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ss := s.clone()
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C.fputs(ss.cstr(), f.cfile)
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// ss.free()
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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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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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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) appendln(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.cstr(), 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) close() {
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C.fclose(f.cfile)
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}
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fn close_file(fp *FILE) {
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$if windows {
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}
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# if (fp)
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C.fclose(fp)
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}
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// system starts the specified command, waits for it to complete, and returns its code.
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pub fn system(cmd string) int {
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ret := C.system(cmd.cstr())
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if ret == -1 {
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os.print_c_errno()
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}
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return ret
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}
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fn popen(path string) *FILE {
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cpath := path.cstr()
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$if windows {
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return C._popen(cpath, 'r')
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}
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$else {
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return C.popen(cpath, 'r')
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}
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}
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// exec starts the specified command, waits for it to complete, and returns its output.
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pub fn exec(cmd string) string {
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cmd = '$cmd 2>&1'
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f := popen(cmd)
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if isnil(f) {
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// TODO optional or error code
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println('popen $cmd failed')
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return ''
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}
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buf := [1000]byte
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mut res := ''
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for C.fgets(buf, 1000, f) != 0 {
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res += tos(buf, strlen(buf))
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}
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return res.trim_space()
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}
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/*
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// TODO
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fn system_into_lines(s string) []string {
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mut res := []string
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cmd := '$s 2>&1'
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max := 5000
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$if windows {
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# FILE* f = _popen(cmd.str, "r");
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}
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$else {
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# FILE* f = popen(cmd.str, "r");
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}
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# char * buf = malloc(sizeof(char) * max);
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# while (fgets(buf, max, f) != NULL)
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{
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val := ''
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# buf[strlen(buf) - 1] = '\0'; // eat the newline fgets() stores
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# val=tos_clone(buf);
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res << val
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}
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return res
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}
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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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s := C.getenv(key.cstr())
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if isnil(s) {
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return ''
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}
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return tos2(s)
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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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res := false
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$if windows {
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# res = _access( path.str, 0 ) != -1 ;
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}
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$else {
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# res = access( path.str, 0 ) != -1 ;
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}
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return res
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}
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pub fn dir_exists(path string) bool {
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dir := C.opendir(path.cstr())
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res := !isnil(dir)
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if res {
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C.closedir(dir)
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}
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return res
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}
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// `mkdir` creates a new directory with the specified path.
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pub fn mkdir(path string) {
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$if windows {
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path = path.replace('/', '\\')
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C.CreateDirectory(path.cstr(), 0)
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}
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$else {
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C.mkdir(path.cstr(), 511)// S_IRWXU | S_IRWXG | S_IRWXO
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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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// os.system2('del /f $path')
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}
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$else {
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C.remove(path.cstr())
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}
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// C.unlink(path.cstr())
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}
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/*
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// TODO
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fn rmdir(path, guard string) {
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if !path.contains(guard) {
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println('rmdir canceled because the path doesnt contain $guard')
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return
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}
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$if !windows {
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}
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$else {
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}
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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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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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max := 256
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buf := malloc(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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if buf[nr_chars - 1] == `\n` /* newline */ {
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return tos(buf, nr_chars - 1)
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}
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/* To prevent cutting end of line if no newline */
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return tos(buf, nr_chars)
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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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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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$if windows {
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home = os.getenv('HOMEDRIVE')
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home += os.getenv('HOMEPATH')
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}
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home += '/'
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return home
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}
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// write_file writes text data to a file in `path`.
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pub fn write_file(path, text string) {
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f := os.create(path)
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f.appendln(text)
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f.close()
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}
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pub fn clear() {
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C.printf('\x1b[2J')
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C.printf('\x1b[H')
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}
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fn on_segfault(f voidptr) {
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$if windows {
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return
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}
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$if mac {
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# struct sigaction sa;
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# memset(&sa, 0, sizeof(struct sigaction));
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# sigemptyset(&sa.sa_mask);
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# sa.sa_sigaction = f;
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# sa.sa_flags = SA_SIGINFO;
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# sigaction(SIGSEGV, &sa, 0);
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}
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} |