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buffer.h
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buffer.h
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/*
* Copyright (c) 2008, Natacha Porté
* Copyright (c) 2011, Vicent Martí
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef BUFFER_H__
#define BUFFER_H__
#include <stddef.h>
#include <stdarg.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_MSC_VER)
#define __attribute__(x)
#define inline
#endif
typedef enum {
BUF_OK = 0,
BUF_ENOMEM = -1,
} buferror_t;
/* struct buf: character array buffer */
struct buf {
uint8_t *data; /* actual character data */
size_t size; /* size of the string */
size_t asize; /* allocated size (0 = volatile buffer) */
size_t unit; /* reallocation unit size (0 = read-only buffer) */
};
/* CONST_BUF: global buffer from a string litteral */
#define BUF_STATIC(string) \
{ (uint8_t *)string, sizeof string -1, sizeof string, 0, 0 }
/* VOLATILE_BUF: macro for creating a volatile buffer on the stack */
#define BUF_VOLATILE(strname) \
{ (uint8_t *)strname, strlen(strname), 0, 0, 0 }
/* BUFPUTSL: optimized bufputs of a string litteral */
#define BUFPUTSL(output, literal) \
bufput(output, literal, sizeof literal - 1)
/* bufgrow: increasing the allocated size to the given value */
int bufgrow(struct buf *, size_t);
/* bufnew: allocation of a new buffer */
struct buf *bufnew(size_t) __attribute__ ((malloc));
/* bufnullterm: NUL-termination of the string array (making a C-string) */
const char *bufcstr(struct buf *);
/* bufprefix: compare the beginning of a buffer with a string */
int bufprefix(const struct buf *buf, const char *prefix);
/* bufput: appends raw data to a buffer */
void bufput(struct buf *, const void *, size_t);
/* bufputs: appends a NUL-terminated string to a buffer */
void bufputs(struct buf *, const char *);
/* bufputc: appends a single char to a buffer */
void bufputc(struct buf *, int);
/* bufrelease: decrease the reference count and free the buffer if needed */
void bufrelease(struct buf *);
/* bufreset: frees internal data of the buffer */
void bufreset(struct buf *);
/* bufslurp: removes a given number of bytes from the head of the array */
void bufslurp(struct buf *, size_t);
/* bufprintf: formatted printing to a buffer */
void bufprintf(struct buf *, const char *, ...) __attribute__ ((format (printf, 2, 3)));
#ifdef __cplusplus
}
#endif
#endif