71 lines
1.2 KiB
V
71 lines
1.2 KiB
V
// Copyright (c) 2019-2020 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 strings
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pub struct Builder {
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mut:
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buf []byte
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pub mut:
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len int
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initial_size int=1
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}
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pub fn new_builder(initial_size int) Builder {
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return Builder{
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buf: make(0, initial_size, 1)
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initial_size: initial_size
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}
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}
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pub fn (b mut Builder) write_bytes(bytes byteptr, howmany int) {
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b.buf.push_many(bytes, howmany)
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b.len += howmany
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}
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pub fn (b mut Builder) write_b(data byte) {
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b.buf << data
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b.len++
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}
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pub fn (b mut Builder) write(s string) {
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if s == '' {
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return
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}
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b.buf.push_many(s.str, s.len)
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// for c in s {
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// b.buf << c
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// }
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// b.buf << []byte(s) // TODO
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b.len += s.len
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}
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pub fn (b mut Builder) go_back(n int) {
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b.buf.trim(b.buf.len-n)
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b.len -= n
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}
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pub fn (b mut Builder) writeln(s string) {
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// for c in s {
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// b.buf << c
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// }
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b.buf.push_many(s.str, s.len)
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// b.buf << []byte(s) // TODO
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b.buf << `\n`
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b.len += s.len + 1
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}
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pub fn (b mut Builder) str() string {
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b.buf << `\0`
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return string(b.buf,b.len)
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}
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pub fn (b mut Builder) free() {
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unsafe{
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free(b.buf.data)
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}
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b.buf = make(0, b.initial_size, 1)
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b.len = 0
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}
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