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#include "std/base.toc", base;
#include "std/mem.toc", mem;
str_to_cstr ::= fn(s: []char) []char {
ret := mem.news(char, s.len+1);
mem.mem_copy(&ret[0], &s[0], s.len);
return ret;
}
// @TODO(eventually): enum
FileError ::= int;
FILE_ERR_OK ::= 0;
FILE_ERR_MISC ::= 1;
// @TODO: more of these
/*
the raw file interface:
raw_stdout - standard output
raw_stderr - standard error
raw_file_write - write to a raw file
raw_file_open_write - open a raw file for writing
raw_file_close - flush and close a raw file
*/
#if base.PLATFORM_IS_UNIX {
// @TODO: use syscall instead (it'll allow other functions called write)
write ::= #foreign("write", base.libc) fn(#C int, #C &"const void", #C size_t) #C long;
open ::= #foreign("open", base.libc) fn (#C &"const char", #C int, #C unsigned) #C int;
close ::= #foreign("close", base.libc) fn (#C int) #C int;
DEFAULT_MODE ::= 0o644;
O_RDONLY ::= 0x00;
O_WRONLY ::= 0x01;
O_CREAT ::= 0x40;
RawFile ::= int;
raw_file_write ::= fn(file: RawFile, buf: &void, size: int) bool {
while size > 0 {
bytes_written := write(file as #C int, buf, size as #C size_t);
if bytes_written < 0 {
return false;
}
size -= bytes_written;
buf += bytes_written;
}
return true;
}
raw_stdout ::= fn() RawFile {
return 1;
}
raw_stderr ::= fn() RawFile {
return 2;
}
raw_file_open_write ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK {
cstr := str_to_cstr(name);
defer mem.dels(cstr);
// @TODO: switch to bitwise or when that exists
f = open(&cstr[0], (O_WRONLY + O_CREAT) as #C int, DEFAULT_MODE as #C unsigned) as RawFile;
if f == -1 {
err = FILE_ERR_MISC; // @TODO
}
}
raw_file_close ::= fn(f: RawFile) err := FILE_ERR_OK {
if close(f as #C int) == -1 {
err = FILE_ERR_MISC; // @TODO
}
}
} else {
// @TODO: on windows, use WriteFile
fwrite ::= #foreign("fwrite", base.libc) fn(#C &"const void", #C size_t, #C size_t, &void) #C size_t;
RawFile ::= &void;
raw_file_write ::= fn(file: RawFile, buf: &void, size: int) bool {
bytes_written := fwrite(buf, 1, size, file) as int;
return bytes_written == size;
}
raw_stdout ::= fn() RawFile {
return #builtin("stdout");
}
raw_stderr ::= fn() RawFile {
return #builtin("stderr");
}
raw_file_open_write ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK {
cstr := base.str_to_cstr(name);
defer mem.dels(cstr);
mode := "w\0";
f = fopen(&cstr[0], &mode[0]);
if f == null {
err = FILE_ERR_MISC; // @TODO
}
}
raw_file_close ::= fn(f: RawFile) err := FILE_ERR_OK {
if fclose(f) != 0 {
err = FILE_ERR_MISC; // @TODO
}
}
}
File ::= struct {
BUFSZ ::= 4096;
raw : RawFile;
buffer_used : int; // ranges from 0 to FILE_BUFSZ-1
nobuffer : bool; // if true, flush after every write
buffer : [BUFSZ]char;
}
raw_file_to_file ::= fn(raw : RawFile, f: &File) {
f.raw = raw;
}
std_out, std_err : File;
fopen_write ::= fn(name: []char) f: &File, error: FileError {
raw : RawFile;
raw, error = raw_file_open_write(name);
if !error {
f = mem.new(File);
raw_file_to_file(raw, f);
}
}
flush ::= fn(use f: &File) {
raw_file_write(raw, &buffer[0], buffer_used);
buffer_used = 0;
}
fclose ::= fn(f: &File) err: FileError {
err = raw_file_close(f.raw);
mem.del(f);
}
fwrites ::= fn(use f: &File, s : []char) {
if f.nobuffer {
raw_file_write(raw, &s[0], s.len);
return;
}
if buffer_used + s.len > BUFSZ {
flush(f);
if s.len > BUFSZ {
raw_file_write(raw, &s[0], s.len);
} else {
mem.mem_copy(&buffer[0], &s[0], s.len);
buffer_used = s.len;
}
} else {
mem.mem_copy(&buffer[buffer_used], &s[0], s.len);
buffer_used += s.len;
}
}
fputs ::= fn(f: &File, s: []char) {
fwrites(f, s);
fwrites(f, "\n");
}
puts ::= fn(s: []char) {
fputs(&std_out, s);
}
io_init ::= fn() {
raw_file_to_file(raw_stdout(), &std_out);
std_out.nobuffer = true;
raw_file_to_file(raw_stderr(), &std_err);
std_err.nobuffer = true;
}
#init io_init();
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