v/vlib/strings/builder.v

44 lines
788 B
V
Raw Normal View History

2019-06-23 04:21:30 +02:00
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module strings
2019-06-22 20:20:28 +02:00
struct Builder {
mut:
2019-06-22 20:20:28 +02:00
buf []byte
2019-08-01 15:01:03 +02:00
pub:
2019-06-22 20:20:28 +02:00
len int
}
pub fn new_builder(initial_size int) Builder {
return Builder {
buf: _make(0, initial_size, sizeof(byte))
2019-06-22 20:20:28 +02:00
}
}
pub fn (b mut Builder) write(s string) {
2019-06-22 20:20:28 +02:00
b.buf._push_many(s.str, s.len)
//b.buf << []byte(s) // TODO
2019-06-22 20:20:28 +02:00
b.len += s.len
}
pub fn (b mut Builder) writeln(s string) {
2019-06-22 20:20:28 +02:00
b.buf._push_many(s.str, s.len)
//b.buf << []byte(s) // TODO
2019-06-22 20:20:28 +02:00
b.buf << `\n`
b.len += s.len + 1
}
pub fn (b Builder) str() string {
return string(b.buf, b.len)
2019-06-22 20:20:28 +02:00
}
2019-08-06 18:13:04 +02:00
pub fn (b mut Builder) cut(n int) {
2019-06-22 20:20:28 +02:00
b.len -= n
}
pub fn (b mut Builder) free() {
2019-07-21 12:22:41 +02:00
free(b.buf.data)
2019-06-24 22:34:21 +02:00
}