diff options
Diffstat (limited to 'std')
| -rw-r--r-- | std/io.toc | 90 |
1 files changed, 80 insertions, 10 deletions
@@ -42,7 +42,7 @@ raw_file_close - close a raw file O_CREAT ::= 0x40; RawFile ::= int; - raw_file_write ::= fn(file: RawFile, buf: &void, size: int) err := FILE_ERR_OK { + raw_file_write ::= fn(file: RawFile, buf: &void, size: int) err : FileError { while size > 0 { bytes_written := write(file as #C int, buf, size as #C size_t); if bytes_written < 0 { @@ -53,7 +53,7 @@ raw_file_close - close a raw file buf += bytes_written; } } - raw_file_read ::= fn(file: RawFile, buf: &void, size: int) n: int, err := FILE_ERR_OK { + raw_file_read ::= fn(file: RawFile, buf: &void, size: int) n: int, err : FileError { bytes_read := read(file as #C int, buf, size as #C size_t); if bytes_read < 0 { err = FILE_ERR_MISC; @@ -70,7 +70,7 @@ raw_file_close - close a raw file raw_stdin ::= fn() RawFile { return 0; } - raw_file_open_write ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK { + raw_file_open_write ::= fn(name: []char) f: RawFile, err : FileError { cstr := str_to_cstr(name); defer mem.dels(cstr); // @TODO: switch to bitwise or when that exists @@ -79,7 +79,7 @@ raw_file_close - close a raw file err = FILE_ERR_MISC; // @TODO } } - raw_file_open_read ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK { + raw_file_open_read ::= fn(name: []char) f: RawFile, err : FileError { cstr := str_to_cstr(name); defer mem.dels(cstr); f = open(&cstr[0], O_RDONLY as #C int, 0) as RawFile; @@ -87,7 +87,7 @@ raw_file_close - close a raw file err = FILE_ERR_MISC; // @TODO } } - raw_file_close ::= fn(f: RawFile) err := FILE_ERR_OK { + raw_file_close ::= fn(f: RawFile) err : FileError { if close(f as #C int) == -1 { err = FILE_ERR_MISC; // @TODO } @@ -117,7 +117,7 @@ raw_file_close - close a raw file raw_stdin ::= fn() RawFile { return #builtin("stdin"); } - raw_file_open_write ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK { + raw_file_open_write ::= fn(name: []char) f: RawFile, err : FileError { cstr := base.str_to_cstr(name); defer mem.dels(cstr); mode := "wb\0"; @@ -126,7 +126,7 @@ raw_file_close - close a raw file err = FILE_ERR_MISC; // @TODO } } - raw_file_open_read ::= fn(name: []char) f: RawFile, err := FILE_ERR_OK { + raw_file_open_read ::= fn(name: []char) f: RawFile, err : FileError { cstr := base.str_to_cstr(name); defer mem.dels(cstr); mode := "rb\0"; @@ -135,7 +135,7 @@ raw_file_close - close a raw file err = FILE_ERR_MISC; // @TODO } } - raw_file_close ::= fn(f: RawFile) err := FILE_ERR_OK { + raw_file_close ::= fn(f: RawFile) err : FileError { if fclose(f) != 0 { err = FILE_ERR_MISC; // @TODO } @@ -206,9 +206,17 @@ fclose ::= fn(f: &File) err: FileError { mem.del(f); } +can_write ::= fn(mode: FileMode) bool { + return mode == MODE_WRITE; +} + +can_read ::= fn(mode: FileMode) bool { + return mode == MODE_READ; +} + fwrites ::= fn(use f: &File, s : []char) FileError { #if IO_DEBUG { - if mode != MODE_WRITE { + if !can_write(mode) { base.error("Writing to file which wasn't opened for writing."); } } @@ -247,10 +255,72 @@ puts ::= fn(s: []char) FileError { return fputs(&std_out, s); } +fwritei ::= fn(use f: &File, x: int) err : FileError { + #if IO_DEBUG { + if !can_write(mode) { + base.error("Writing to file which wasn't opened for writing."); + } + } + max_int_len ::= 20; // maximum length of a 64-bit integer, converted to a string + if buffer_used > BUFSZ - max_int_len { + err = flush(f); + if err { return; } + } + + out := &buffer[buffer_used]; + start := out; + + defer buffer_used = out - start; + + // flush at end if file is not buffered + defer if nobuffer { + err = flush(f); + } + + + x_unsigned : u64; + + if x > 0 { + x_unsigned = x as u64; + } elif x < 0 { + *out = '-'; + out += 1; + // get the absolute value of x in a u64. this complicated stuff is needed because -INT_MIN doesn't fit in a 64-bit signed integer + x_unsigned = (x as u64) - 18446744073709551615 - 1; + } else { + *out = '0'; + out += 1; + return; + } + + scan_digit : u64 = 1000000000000000000; + started := false; + while scan_digit > 0 { + digit := (x_unsigned / scan_digit) % 10; + if digit > 0 { started = true; } + if started { + *out = (('0' as u64) + digit) as char; + out += 1; + } + scan_digit /= 10; + } +} + +writei ::= fn(x: int) FileError { + return fwritei(&std_out, x); +} + +puti ::= fn(x: int) err : FileError { + err = writei(x); + if !err { + err = writes("\n"); + } +} + // read into out, set its length appropriately fread ::= fn(use f: &File, out: &[]char) FileError { #if IO_DEBUG { - if mode != MODE_READ { + if !can_read(mode) { base.error("Reading from file which wasn't opened for reading."); } } |