100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/* buffer.h
|
|
*
|
|
* Copyright (C) 2010-2011 Henrik Hautakoski <henrik@fiktivkod.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef BUFFER_H
|
|
#define BUFFER_H
|
|
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
|
|
struct buffer {
|
|
unsigned char *block;
|
|
size_t len;
|
|
size_t size;
|
|
};
|
|
|
|
extern unsigned char buffer_null;
|
|
|
|
#define BUFFER_INIT { &buffer_null, 0, 0 }
|
|
|
|
void buffer_init(struct buffer *b);
|
|
|
|
static inline size_t buffer_avail(struct buffer *b) {
|
|
|
|
return b->size ? b->size - (b->len + 1) : 0;
|
|
}
|
|
|
|
void buffer_expand(struct buffer *b, size_t len);
|
|
|
|
static inline void buffer_setlen(struct buffer *b, size_t len) {
|
|
|
|
if (!b->size)
|
|
return;
|
|
|
|
if (len >= b->size)
|
|
len = b->size - 1;
|
|
b->len = len;
|
|
}
|
|
|
|
static inline void buffer_reduce(struct buffer *b, size_t len) {
|
|
|
|
if (len > b->len)
|
|
len = b->len;
|
|
|
|
buffer_setlen(b, b->len - len);
|
|
}
|
|
|
|
char* buffer_cstr(struct buffer *b);
|
|
|
|
char* buffer_cstr_release(struct buffer *b);
|
|
|
|
void buffer_free(struct buffer *b);
|
|
|
|
void buffer_attach(struct buffer *b, void *str, size_t len, size_t size);
|
|
|
|
void buffer_append(struct buffer *b, const void *ptr, size_t len);
|
|
|
|
static inline void buffer_append_str(struct buffer *b, const char *str) {
|
|
|
|
buffer_append(b, str, strlen(str));
|
|
}
|
|
|
|
static inline void buffer_append_ch(struct buffer *b, char ch) {
|
|
|
|
buffer_expand(b, 1);
|
|
b->block[b->len++] = ch;
|
|
}
|
|
|
|
static inline void buffer_append_repeat(struct buffer *b, char ch, size_t len) {
|
|
|
|
buffer_expand(b, len);
|
|
memset(b->block + b->len, ch, len);
|
|
buffer_setlen(b, b->len + len);
|
|
}
|
|
|
|
static inline void buffer_str_term(struct buffer *b, char ch) {
|
|
|
|
if (b->block[b->len - 1] != ch)
|
|
buffer_append_ch(b, ch);
|
|
}
|
|
|
|
int buffer_write(struct buffer *b, const char *filename);
|
|
|
|
#endif /* BUFFER_H */
|