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/*
* include/common/chunk.h
* Chunk management definitions, macros and inline functions.
*
* Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _TYPES_CHUNK_H
#define _TYPES_CHUNK_H
#include <stdlib.h>
#include <string.h>
#include <common/config.h>
/* describes a chunk of string */
struct chunk {
char *str; /* beginning of the string itself. Might not be 0-terminated */
int size; /* total size of the buffer, 0 if the *str is read-only */
int len; /* current size of the string from first to last char. <0 = uninit. */
};
/* function prototypes */
int chunk_printf(struct chunk *chk, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
int chunk_appendf(struct chunk *chk, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
int chunk_htmlencode(struct chunk *dst, struct chunk *src);
int chunk_asciiencode(struct chunk *dst, struct chunk *src, char qc);
int chunk_strcmp(const struct chunk *chk, const char *str);
int chunk_strcasecmp(const struct chunk *chk, const char *str);
int alloc_trash_buffers(int bufsize);
struct chunk *get_trash_chunk(void);
static inline void chunk_reset(struct chunk *chk)
{
chk->len = 0;
}
static inline void chunk_init(struct chunk *chk, char *str, size_t size)
{
chk->str = str;
chk->len = 0;
chk->size = size;
}
/* report 0 in case of error, 1 if OK. */
static inline int chunk_initlen(struct chunk *chk, char *str, size_t size, int len)
{
if (size && len > size)
return 0;
chk->str = str;
chk->len = len;
chk->size = size;
return 1;
}
static inline void chunk_initstr(struct chunk *chk, char *str)
{
chk->str = str;
chk->len = strlen(str);
chk->size = 0; /* mark it read-only */
}
static inline int chunk_strcpy(struct chunk *chk, const char *str)
{
size_t len;
len = strlen(str);
if (unlikely(len > chk->size))
return 0;
chk->len = len;
memcpy(chk->str, str, len);
return 1;
}
static inline void chunk_drop(struct chunk *chk)
{
chk->str = NULL;
chk->len = -1;
chk->size = 0;
}
static inline void chunk_destroy(struct chunk *chk)
{
if (!chk->size)
return;
free(chk->str);
chunk_drop(chk);
}
/*
* frees the destination chunk if already allocated, allocates a new string,
* and copies the source into it. The pointer to the destination string is
* returned, or NULL if the allocation fails or if any pointer is NULL..
*/
static inline char *chunk_dup(struct chunk *dst, const struct chunk *src)
{
if (!dst || !src || !src->str)
return NULL;
if (dst->str)
free(dst->str);
dst->len = src->len;
dst->str = (char *)malloc(dst->len);
memcpy(dst->str, src->str, dst->len);
return dst->str;
}
#endif /* _TYPES_CHUNK_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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