code: buf.c annotate

annotate buf.c @ 127:e00bc8f7eabf

Fixed buf printf

author	David Demelier <markand@malikania.fr>
date	Wed, 07 Mar 2012 10:22:18 +0100
parents	911201e7574f
children	7e72d4008f6d

rev	line source
125 b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	1 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	2 * buf.c -- easy way to manipulate strings
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	3 *
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	4 * Copyright (c) 2011, 2012, David Demelier <markand@malikania.fr>
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	5 *
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	6 * Permission to use, copy, modify, and/or distribute this software for any
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	7 * purpose with or without fee is hereby granted, provided that the above
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	8 * copyright notice and this permission notice appear in all copies.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	9 *
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	17 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	18
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	19 #include <stdio.h>
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	20 #include <stdlib.h>
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	21 #include <string.h>
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	22
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	23 #include "buf.h"
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	24
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	25 #define BUF_AVAIL(buf) ((buf)->alsize - (buf)->length - 1)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	26 #define BUF_SAFE(buf) (!((buf)->flags & BUF_UNSAFE))
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	27 #define BUF_FIXED(buf) ((buf)->flags & BUF_FIXED)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	28 #define BUF_AUTO(buf) (buf->flags == 0)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	29
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	30 static void copy(struct buf , const void , size_t);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	31 static int grow(struct buf *, size_t);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	32
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	33 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	34 buf_init(struct buf *buf)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	35 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	36 /* Set defaults if needed */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	37 buf->bsize = (buf->bsize <= 0) ? BUF_DEFAULT_BSIZE : buf->bsize;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	38 buf->alsize = buf->bsize + 1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	39 buf->malloc = (buf->malloc == NULL) ? &malloc : buf->malloc;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	40 buf->realloc = (buf->realloc == NULL) ? &realloc : buf->realloc;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	41
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	42 if ((buf->text = buf->malloc(buf->alsize)) == NULL)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	43 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	44
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	45 memset(buf->text, 0, buf->alsize);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	46
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	47 return 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	48 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	49
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	50 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	51 * This function appends not more than max characters from str.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	52 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	53
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	54 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	55 buf_ncat(struct buf buf, const char str, size_t max)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	56 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	57 size_t tocopy = max;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	58
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	59 for (tocopy = 0; str[tocopy] != '\0' && tocopy < max; ++tocopy)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	60 continue;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	61
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	62 if (BUF_AVAIL(buf) < tocopy) {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	63 /* Can't add more */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	64 if (BUF_SAFE(buf) && BUF_FIXED(buf))
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	65 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	66
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	67 if (BUF_AUTO(buf)) {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	68 if (grow(buf, tocopy) < 0)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	69 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	70 } else {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	71 /* String is unsafe, truncate to the available size */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	72 tocopy = BUF_AVAIL(buf);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	73 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	74 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	75
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	76 copy(buf, str, tocopy);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	77
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	78 return 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	79 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	80
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	81 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	82 * Append the string str to the end of the string buffer.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	83 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	84
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	85 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	86 buf_cat(struct buf buf, const char str)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	87 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	88 return buf_ncat(buf, str, strlen(str));
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	89 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	90
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	91 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	92 * Copy at most max character from str to string buffer.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	93 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	94
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	95 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	96 buf_ncopy(struct buf buf, const char str, size_t max)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	97 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	98 buf_clear(buf);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	99
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	100 return buf_ncat(buf, str, max);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	101 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	102
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	103 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	104 * Copy the string str to the string buffer.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	105 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	106
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	107 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	108 buf_copy(struct buf buf, const char str)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	109 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	110 return buf_ncopy(buf, str, strlen(str));
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	111 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	112
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	113 /*
127 e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	114 * Concatenate the printf(3) like call to the string buffer, this function
125 b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	115 * returns -1 on fixed safe buffer, otherwise 0 is returned if there
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	116 * is no allocation failure.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	117 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	118
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	119 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	120 buf_vprintf(struct buf buf, const char fmt, va_list ap)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	121 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	122 int copied, done = 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	123
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	124 if (BUF_FIXED(buf) && BUF_SAFE(buf))
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	125 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	126
127 e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	127 do {
e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	128 copied = vsnprintf(&buf->text[buf->length],
e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	129 BUF_AVAIL(buf), fmt, ap);
125 b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	130
127 e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	131 buf->length = strlen(buf->text);
125 b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	132
127 e00bc8f7eabf Fixed buf printf David Demelier <markand@malikania.fr> parents: 126 diff changeset	133 if (copied >= (signed int)BUF_AVAIL(buf) \|\| copied == -1) {
125 b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	134 if (BUF_FIXED(buf))
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	135 done = 1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	136
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	137 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	138 * vsnprintf returns -1 on windows, we need to grow
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	139 * the buffer by block size.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	140 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	141 if (grow(buf, buf->alsize + buf->bsize) < 0)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	142 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	143 } else {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	144 done = 1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	145 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	146 } while (!done);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	147
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	148 return 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	149 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	150
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	151 int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	152 buf_printf(struct buf buf, const char fmt, ...)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	153 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	154 va_list ap;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	155 int rv;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	156
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	157 va_start(ap, fmt);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	158 rv = buf_vprintf(buf, fmt, ap);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	159 va_end(ap);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	160
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	161 return rv;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	162 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	163
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	164 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	165 * Clear the string buffer.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	166 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	167
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	168 void
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	169 buf_clear(struct buf *buf)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	170 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	171 memset(buf->text, 0, buf->alsize);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	172
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	173 buf->length = 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	174 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	175
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	176 void
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	177 buf_free(struct buf *buf)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	178 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	179 buf_clear(buf);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	180
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	181 free(buf->text);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	182 buf->text = NULL;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	183 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	184
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	185 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	186 * Valid options that can be set for a buffer :
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	187 * l -> optional buf block size of type int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	188 * m -> malloc function that must matches void * (*malloc)(size_t)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	189 * r -> realloc function that must matches void * (realloc)(void , size_t)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	190 * f -> buffer flags that are OR'ed
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	191 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	192
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	193 void
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	194 buf_set(struct buf buf, const char fmt, ...)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	195 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	196 va_list ap;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	197 const char *p;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	198
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	199 va_start(ap, fmt);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	200 for (p = fmt; *p != '\0'; ++p)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	201 switch (*p) {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	202 case 'l':
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	203 buf->bsize = va_arg(ap, int);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	204 break;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	205 case 'm':
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	206 buf->malloc = va_arg(ap, void ()(size_t));
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	207 break;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	208 case 'r':
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	209 buf->realloc = va_arg(ap, void ()(void *, size_t));
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	210 break;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	211 case 'f':
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	212 case 't':
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	213 buf->flags = va_arg(ap, int);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	214 break;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	215 default:
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	216 break;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	217 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	218 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	219
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	220 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	221 * Append to the end of buffer the void ptr of count size.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	222 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	223
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	224 static void
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	225 copy(struct buf buf, const void ptr, size_t count)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	226 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	227 memcpy(buf->text + buf->length, ptr, count);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	228
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	229 buf->text[buf->length + count] = '\0';
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	230 buf->length += count;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	231 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	232
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	233 /*
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	234 * Grow the text buffer until the available size fit the needed
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	235 * size. This function may return -1 on allocation failure.
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	236 */
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	237
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	238 static int
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	239 grow(struct buf *buf, size_t needed)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	240 {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	241 while (BUF_AVAIL(buf) <= needed) {
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	242 buf->text = buf->realloc(buf->text, buf->alsize + buf->bsize);
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	243
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	244 if (buf->text == NULL)
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	245 return -1;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	246
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	247 buf->alsize += buf->bsize;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	248 }
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	249
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	250 return 0;
b9723c197038 Add brand new string buffer David Demelier <markand@malikania.fr> parents: diff changeset	251 }

Mercurial > code

annotate buf.c @ 127:e00bc8f7eabf