dovecot/core-2.2: src/lib/buffer.c annotate

annotate src/lib/buffer.c @ 805:5ac361acb316 HEAD

Marked all non-trivial buffer modifications with @UNSAFE tag. Several cleanups and a couple of minor bugfixes.

author	Timo Sirainen <tss@iki.fi>
date	Wed, 18 Dec 2002 17:15:41 +0200
parents	553f050c8313
children	27774d0493dd

rev	line source
765 553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	1 /*
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	2 Copyright (c) 2002 Timo Sirainen
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	3
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	4 Permission is hereby granted, free of charge, to any person obtaining
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	5 a copy of this software and associated documentation files (the
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	6 "Software"), to deal in the Software without restriction, including
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	7 without limitation the rights to use, copy, modify, merge, publish,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	8 distribute, sublicense, and/or sell copies of the Software, and to
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	9 permit persons to whom the Software is furnished to do so, subject to
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	10 the following conditions:
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	11
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	12 The above copyright notice and this permission notice shall be
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	13 included in all copies or substantial portions of the Software.
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	14
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	16 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	18 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	19 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	20 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	21 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	22 */
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	23
805 5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	24 /* @UNSAFE: whole file */
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	25
765 553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	26 #include "lib.h"
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	27 #include "buffer.h"
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	28
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	29 struct _Buffer {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	30 Pool pool;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	31
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	32 const unsigned char *r_buffer;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	33 unsigned char *w_buffer;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	34 size_t used, alloc, max_alloc, limit, start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	35
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	36 unsigned int alloced:1;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	37 unsigned int readonly:1;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	38 unsigned int hard:1;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	39 };
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	40
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	41 static void buffer_alloc(Buffer *buf, size_t min_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	42 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	43 if (min_size == 0)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	44 return;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	45
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	46 buf->alloc = min_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	47 if (buf->w_buffer == NULL)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	48 buf->w_buffer = p_malloc(buf->pool, buf->alloc);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	49 else
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	50 buf->w_buffer = p_realloc(buf->pool, buf->w_buffer, buf->alloc);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	51 buf->r_buffer = buf->w_buffer;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	52 buf->alloced = TRUE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	53 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	54
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	55 static int buffer_check_read(const Buffer buf, size_t pos, size_t *data_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	56 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	57 size_t used_size, max_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	58
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	59 used_size = I_MIN(buf->used, buf->limit);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	60 if (*pos >= used_size - buf->start_pos)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	61 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	62
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	63 *pos += buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	64 max_size = used_size - *pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	65 if (*data_size > max_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	66 *data_size = max_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	67 return TRUE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	68 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	69
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	70 static int buffer_check_write(Buffer buf, size_t pos, size_t *data_size,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	71 int accept_partial)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	72 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	73 size_t max_size, new_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	74
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	75 if (buf->readonly)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	76 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	77
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	78 /* check that we don't overflow size_t */
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	79 max_size = (size_t)-1 - *pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	80 if (buf->start_pos >= max_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	81 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	82 *pos += buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	83
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	84 if (*data_size <= max_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	85 new_size = pos + data_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	86 else {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	87 new_size = *pos + max_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	88 if (new_size <= *pos \|\| !accept_partial)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	89 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	90 *data_size = max_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	91 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	92
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	93 /* see if we need to grow the buffer */
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	94 if (new_size > buf->alloc) {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	95 if (new_size > buf->limit) {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	96 if (buf->hard) {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	97 i_panic("Buffer full (%"PRIuSIZE_T" > "
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	98 "%"PRIuSIZE_T")", new_size, buf->limit);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	99 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	100
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	101 if (!accept_partial)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	102 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	103
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	104 new_size = buf->limit;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	105 if (new_size == buf->alloc \|\| new_size <= *pos)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	106 return FALSE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	107
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	108 data_size = new_size - pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	109 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	110
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	111 buffer_alloc(buf, new_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	112 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	113
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	114 if (new_size > buf->used)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	115 buf->used = new_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	116 return TRUE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	117 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	118
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	119 Buffer *buffer_create_static(Pool pool, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	120 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	121 Buffer *buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	122
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	123 buf = p_new(pool, Buffer, 1);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	124 buf->pool = pool;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	125 buf->max_alloc = buf->limit = size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	126 buffer_alloc(buf, size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	127 return buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	128 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	129
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	130 Buffer *buffer_create_static_hard(Pool pool, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	131 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	132 Buffer *buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	133
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	134 buf = buffer_create_static(pool, size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	135 buf->hard = TRUE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	136 return buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	137 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	138
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	139 Buffer buffer_create_data(Pool pool, void data, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	140 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	141 Buffer *buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	142
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	143 buf = p_new(pool, Buffer, 1);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	144 buf->pool = pool;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	145 buf->max_alloc = buf->limit = size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	146 buf->r_buffer = buf->w_buffer = data;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	147 return buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	148 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	149
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	150 Buffer buffer_create_const_data(Pool pool, const void data, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	151 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	152 Buffer *buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	153
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	154 buf = p_new(pool, Buffer, 1);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	155 buf->pool = pool;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	156 buf->used = buf->max_alloc = buf->limit = size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	157 buf->r_buffer = data;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	158 buf->readonly = TRUE;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	159 return buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	160 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	161
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	162 Buffer *buffer_create_dynamic(Pool pool, size_t init_size, size_t max_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	163 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	164 Buffer *buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	165
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	166 buf = p_new(pool, Buffer, 1);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	167 buf->pool = pool;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	168 buf->max_alloc = buf->limit = max_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	169 buffer_alloc(buf, init_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	170 return buf;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	171 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	172
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	173 void buffer_free(Buffer *buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	174 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	175 if (buf->alloced)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	176 p_free(buf->pool, buf->w_buffer);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	177 p_free(buf->pool, buf);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	178 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	179
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	180 void buffer_free_without_data(Buffer buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	181 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	182 void *data;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	183
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	184 data = buf->w_buffer;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	185 p_free(buf->pool, buf);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	186 return data;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	187 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	188
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	189 size_t buffer_write(Buffer *buf, size_t pos,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	190 const void *data, size_t data_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	191 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	192 if (!buffer_check_write(buf, &pos, &data_size, TRUE))
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	193 return 0;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	194
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	195 memcpy(buf->w_buffer + pos, data, data_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	196 return data_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	197 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	198
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	199 size_t buffer_append(Buffer buf, const void data, size_t data_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	200 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	201 return buffer_write(buf, buf->used - buf->start_pos, data, data_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	202 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	203
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	204 size_t buffer_append_c(Buffer *buf, char chr)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	205 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	206 size_t pos, data_size = 1;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	207
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	208 pos = buf->used - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	209 if (!buffer_check_write(buf, &pos, &data_size, TRUE))
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	210 return 0;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	211
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	212 if (data_size == 1)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	213 buf->w_buffer[pos] = chr;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	214 return data_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	215 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	216
805 5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	217 size_t buffer_insert(Buffer *buf, size_t pos,
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	218 const void *data, size_t data_size)
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	219 {
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	220 size_t move_size, size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	221
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	222 move_size = buf->used - buf->start_pos;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	223 i_assert(pos <= move_size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	224 move_size -= pos;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	225
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	226 if (data_size < (size_t)-1 - move_size)
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	227 size = data_size + move_size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	228 else
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	229 size = (size_t)-1;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	230
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	231 if (!buffer_check_write(buf, &pos, &size, TRUE))
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	232 return 0;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	233
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	234 i_assert(size >= move_size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	235 size -= move_size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	236
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	237 memmove(buf->w_buffer + pos + size, buf->w_buffer + pos, move_size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	238 memcpy(buf->w_buffer + pos, data, size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	239 return size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	240 }
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	241
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	242 size_t buffer_delete(Buffer *buf, size_t pos, size_t size)
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	243 {
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	244 size_t end_size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	245
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	246 if (buf->readonly)
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	247 return 0;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	248
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	249 end_size = buf->used - buf->start_pos;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	250 i_assert(pos <= end_size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	251 end_size -= pos;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	252
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	253 if (size < end_size) {
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	254 /* delete from between */
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	255 memmove(buf->w_buffer + buf->start_pos + pos,
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	256 buf->w_buffer + buf->start_pos + pos + size,
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	257 end_size - size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	258 end_size = size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	259 } else {
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	260 /* delete the rest of the buffer */
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	261 size = end_size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	262 end_size = 0;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	263 }
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	264
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	265 buffer_set_used_size(buf, pos + end_size);
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	266 return size;
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	267 }
5ac361acb316 Marked all non-trivial buffer modifications with @UNSAFE tag. Several Timo Sirainen <tss@iki.fi> parents: 765 diff changeset	268
765 553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	269 size_t buffer_copy(Buffer *dest, size_t dest_pos,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	270 const Buffer *src, size_t src_pos, size_t copy_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	271 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	272 if (!buffer_check_read(src, &src_pos, &copy_size))
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	273 return 0;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	274
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	275 if (!buffer_check_write(dest, &dest_pos, &copy_size, TRUE))
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	276 return 0;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	277
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	278 if (src == dest) {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	279 memmove(dest->w_buffer + dest_pos,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	280 src->r_buffer + src_pos, copy_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	281 } else {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	282 memcpy(dest->w_buffer + dest_pos,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	283 src->r_buffer + src_pos, copy_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	284 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	285 return copy_size;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	286 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	287
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	288 size_t buffer_append_buf(Buffer dest, const Buffer src,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	289 size_t src_pos, size_t copy_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	290 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	291 return buffer_copy(dest, dest->used - dest->start_pos,
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	292 src, src_pos, copy_size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	293 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	294
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	295 void buffer_get_space(Buffer buf, size_t pos, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	296 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	297 if (!buffer_check_write(buf, &pos, &size, FALSE))
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	298 return 0;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	299
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	300 return buf->w_buffer + pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	301 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	302
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	303 void buffer_append_space(Buffer buf, size_t size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	304 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	305 return buffer_get_space(buf, buf->used - buf->start_pos, size);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	306 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	307
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	308 const void buffer_get_data(const Buffer buf, size_t *used_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	309 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	310 if (used_size != NULL)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	311 *used_size = I_MIN(buf->used, buf->limit) - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	312 return buf->r_buffer + buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	313 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	314
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	315 void buffer_get_modifyable_data(const Buffer buf, size_t *used_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	316 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	317 if (used_size != NULL)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	318 *used_size = I_MIN(buf->used, buf->limit) - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	319 return buf->w_buffer + buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	320 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	321
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	322 void buffer_set_used_size(Buffer *buf, size_t used_size)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	323 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	324 i_assert(used_size <= I_MIN(buf->alloc, buf->limit) - buf->start_pos);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	325
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	326 buf->used = used_size + buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	327 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	328
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	329 size_t buffer_get_used_size(const Buffer *buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	330 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	331 return I_MIN(buf->used, buf->limit) - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	332 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	333
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	334 size_t buffer_set_start_pos(Buffer *buf, size_t abs_pos)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	335 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	336 size_t old = buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	337
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	338 i_assert(abs_pos <= I_MIN(buf->used, buf->limit));
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	339
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	340 buf->start_pos = abs_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	341 return old;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	342 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	343
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	344 size_t buffer_get_start_pos(const Buffer *buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	345 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	346 return buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	347 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	348
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	349 size_t buffer_set_limit(Buffer *buf, size_t limit)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	350 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	351 size_t old = buf->limit;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	352
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	353 if (limit > (size_t)-1 - buf->start_pos)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	354 limit = (size_t)-1;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	355 else
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	356 limit += buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	357
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	358 buf->limit = I_MIN(limit, buf->max_alloc);
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	359 return old;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	360 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	361
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	362 size_t buffer_get_limit(const Buffer *buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	363 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	364 return buf->limit - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	365 }
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	366
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	367 size_t buffer_get_size(const Buffer *buf)
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	368 {
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	369 return buf->alloc - buf->start_pos;
553f050c8313 Added buffer API. Point is to hide all buffer writing behind this API which Timo Sirainen <tss@iki.fi> parents: diff changeset	370 }

Mercurial > dovecot > core-2.2

annotate src/lib/buffer.c @ 805:5ac361acb316 HEAD