5220e42038
lifting a portion of the strbuf api/implementation found in archived. This will serve as a base for an generic buffer api.
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/* strbuf.h
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*
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* Copyright (C) 2010-2011 Henrik Hautakoski <henrik@fiktivkod.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __STRBUF_H
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#define __STRBUF_H
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#include <string.h>
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#include <stddef.h>
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typedef struct {
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char *buf;
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size_t len;
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size_t size;
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} strbuf_t;
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extern char strbuf_null;
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#define STRBUF_INIT { &strbuf_null, 0, 0 }
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void strbuf_init(strbuf_t *s);
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static inline size_t strbuf_avail(strbuf_t *s) {
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return s->size ? s->size - (s->len + 1) : 0;
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}
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void strbuf_expand(strbuf_t *s, size_t len);
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static inline void strbuf_setlen(strbuf_t *s, size_t len) {
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if (!s->size)
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return;
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if (len >= s->size)
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len = s->size - 1;
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s->len = len;
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s->buf[s->len] = '\0';
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}
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static inline void strbuf_reduce(strbuf_t *s, size_t len) {
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if (len > s->len)
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len = s->len;
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strbuf_setlen(s, s->len - len);
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}
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char* strbuf_release(strbuf_t *s);
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void strbuf_free(strbuf_t *s);
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void strbuf_attach(strbuf_t *s, void *str, size_t len, size_t size);
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void strbuf_append(strbuf_t *s, const void *ptr, size_t len);
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static inline void strbuf_append_str(strbuf_t *s, const char *str) {
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strbuf_append(s, str, strlen(str));
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}
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static inline void strbuf_append_ch(strbuf_t *s, char ch) {
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strbuf_expand(s, 1);
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s->buf[s->len++] = ch;
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s->buf[s->len] = '\0';
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}
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static inline void strbuf_append_repeat(strbuf_t *s, char ch, size_t len) {
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strbuf_expand(s, len);
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memset(s->buf + s->len, ch, len);
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strbuf_setlen(s, s->len + len);
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}
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static inline void strbuf_term(strbuf_t *s, char ch) {
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if (s->buf[s->len-1] != ch)
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strbuf_append_ch(s, ch);
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}
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#endif /* __STRBUF_H */
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