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annotate buffer.h @ 63:d78c4d9fad13

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Move to port/ code that I didn't write
author David Demelier <markand@malikania.fr>
date Wed, 09 Nov 2011 19:30:33 +0100
parents cda80ba48029
children f773c76b1f3c
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1 /*
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2 * buffer.h -- safe unlimited size string
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3 *
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4 * Copyright (c) 2011, David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #ifndef _BUFFER_H_
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20 #define _BUFFER_H_
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22 #define BUFFER_DEFAULT_BSIZE 512
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24 #include <stdarg.h>
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26 /*
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27 * Some useful attributes with gcc or clang.
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28 */
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29
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30 #if defined(__GNUC__)
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31 # pragma GCC diagnostic warning "-Wnonnull"
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32 # pragma GCC diagnostic warning "-Wformat"
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33 # define __at_malloc __attribute__ ((malloc))
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34 # define __at_nonnull __attribute__ ((nonnull(1)))
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35 # define __at_printf(...) __attribute__ ((format(printf, __VA_ARGS__)))
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36 #else
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37 # define __at_malloc
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38 # define __at_nonnull
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39 # define __at_printf(...)
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40 #endif
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41
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42 enum buffer_type {
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43 BUFFER_FIXED = 0,
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44 BUFFER_AUTO = 1
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45 };
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47 struct buffer {
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48 enum buffer_type type; /* buffer type (default AUTO) */
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49 char *text; /* string buffer */
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50 size_t length; /* string's real length */
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51 size_t size; /* current allocated size */
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52 int bsize; /* initial length */
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53 };
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55 struct buffer *buffer_new(enum buffer_type, int) __at_malloc;
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56 int buffer_strcat(struct buffer *, const char *) __at_nonnull;
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57 int buffer_putc(struct buffer *buf, char) __at_nonnull;
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58 int buffer_bcat(struct buffer *, const void *, size_t) __at_nonnull;
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59 int buffer_vprintf(struct buffer *, const char *, va_list) __at_nonnull;
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60 int buffer_printf(struct buffer *, const char *, ...) __at_printf(2, 3);
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61 int buffer_shrink(struct buffer *) __at_nonnull;
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62 char *buffer_end(struct buffer *) __at_nonnull;
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63 void buffer_clear(struct buffer *) __at_nonnull;
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64 void buffer_free(struct buffer *) __at_nonnull;
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66 #endif /* _BUFFER_H_ */