[0] | 1 | //buffer.c: |
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| 2 | |
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[690] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | * NOTE for everyone want's to change something and send patches: |
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| 24 | * read README and HACKING! There a addition information on |
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| 25 | * the license of this document you need to read before you send |
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| 26 | * any patches. |
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| 27 | * |
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| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 29 | * or libpulse*: |
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| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 31 | * and are therefore GPL. Because of this it may be illigal to use |
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| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 33 | */ |
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| 34 | |
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[0] | 35 | #include "libroar.h" |
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| 36 | |
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| 37 | int roar_buffer_new (struct roar_buffer ** buf, size_t len) { |
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| 38 | struct roar_buffer * new; |
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| 39 | |
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| 40 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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| 41 | |
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| 42 | if ((new = malloc(sizeof(struct roar_buffer))) == NULL) { |
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| 43 | *buf = NULL; |
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| 44 | return -1; |
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| 45 | } |
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| 46 | |
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| 47 | if ((new->data = malloc(len)) == NULL) { |
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| 48 | free(new); |
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| 49 | *buf = NULL; |
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| 50 | return -1; |
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| 51 | } |
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| 52 | |
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| 53 | new->user_data = new->data; |
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| 54 | |
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| 55 | new->next = NULL; |
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| 56 | |
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| 57 | new->len = len; |
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| 58 | new->user_len = len; |
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| 59 | *buf = new; |
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| 60 | |
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| 61 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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| 62 | |
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| 63 | return 0; |
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| 64 | } |
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| 65 | |
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| 66 | int roar_buffer_free (struct roar_buffer * buf) { |
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| 67 | struct roar_buffer * next; |
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| 68 | |
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| 69 | if ( buf == NULL ) |
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| 70 | return -1; |
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| 71 | |
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| 72 | while ((next = buf->next)) { |
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| 73 | free(buf->data); |
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| 74 | free(buf); |
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| 75 | buf = next; |
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| 76 | } |
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| 77 | |
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| 78 | free(buf->data); |
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| 79 | free(buf); |
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| 80 | |
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| 81 | return 0; |
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| 82 | } |
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| 83 | |
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| 84 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 85 | if ( buf == NULL ) { |
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| 86 | if ( next != NULL ) |
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| 87 | *next = NULL; |
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| 88 | return -1; |
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| 89 | } |
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| 90 | |
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| 91 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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| 92 | |
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| 93 | if ( next != NULL ) |
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| 94 | *next = buf->next; |
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| 95 | |
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| 96 | free(buf->data); |
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| 97 | free(buf); |
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| 98 | |
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| 99 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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| 100 | return 0; |
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| 101 | } |
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| 102 | |
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| 103 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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| 104 | if ( buf == NULL ) |
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| 105 | return -1; |
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| 106 | |
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| 107 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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| 108 | |
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| 109 | while ( buf->next != NULL ) { |
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[302] | 110 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 111 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 112 | buf = buf->next; |
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| 113 | } |
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| 114 | |
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| 115 | buf->next = next; |
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| 116 | |
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| 117 | return 0; |
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| 118 | } |
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| 119 | |
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| 120 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 121 | if ( buf == NULL ) |
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| 122 | return -1; |
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| 123 | |
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| 124 | *next = buf->next; |
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| 125 | |
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| 126 | return 0; |
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| 127 | } |
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| 128 | |
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| 129 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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| 130 | if ( buf == NULL ) |
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| 131 | return -1; |
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| 132 | |
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| 133 | *data = buf->user_data; |
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| 134 | |
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| 135 | return 0; |
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| 136 | } |
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| 137 | |
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| 138 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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| 139 | if ( buf == NULL ) |
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| 140 | return -1; |
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| 141 | |
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| 142 | buf->user_len -= off; |
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| 143 | buf->user_data += off; |
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| 144 | |
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| 145 | return 0; |
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| 146 | } |
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| 147 | |
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[904] | 148 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 149 | size_t todo, cl; |
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| 150 | struct roar_buffer * cur; |
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| 151 | void * cd; |
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| 152 | |
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[996] | 153 | if ( len == NULL || buf == NULL || data == NULL ) { |
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| 154 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid input", buf, data, (unsigned long)len); |
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[904] | 155 | return -1; |
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[996] | 156 | } |
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[904] | 157 | |
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[996] | 158 | if ( *buf == NULL ) { |
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| 159 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid pointer to buffer ring", buf, data, (unsigned long)len); |
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[904] | 160 | return -1; |
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[996] | 161 | } |
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[904] | 162 | |
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| 163 | todo = *len; |
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| 164 | cur = *buf; |
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| 165 | |
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| 166 | *len = 0; |
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| 167 | |
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| 168 | while (todo) { |
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| 169 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 170 | |
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| 171 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 172 | return -1; |
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| 173 | |
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| 174 | if ( cl > todo ) { |
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| 175 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 176 | return -1; |
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| 177 | |
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| 178 | cl = todo; |
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| 179 | |
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| 180 | memcpy(data, cd, cl); |
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| 181 | todo -= cl; |
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| 182 | data += cl; |
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| 183 | *len += cl; |
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| 184 | |
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| 185 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 186 | return -1; |
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| 187 | } else { |
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| 188 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 189 | return -1; |
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| 190 | |
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| 191 | memcpy(data, cd, cl); |
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| 192 | todo -= cl; |
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| 193 | data += cl; |
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| 194 | *len += cl; |
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| 195 | |
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| 196 | if ( roar_buffer_next(&cur) == -1 ) |
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| 197 | return -1; |
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| 198 | } |
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| 199 | |
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| 200 | /* |
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| 201 | if ( cur == NULL ) |
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| 202 | break; |
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| 203 | */ |
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| 204 | } |
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| 205 | |
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| 206 | *buf = cur; |
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| 207 | |
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[996] | 208 | return 0; |
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[904] | 209 | } |
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| 210 | |
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[0] | 211 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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| 212 | if ( buf == NULL ) |
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| 213 | return -1; |
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| 214 | |
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| 215 | buf->meta = meta; |
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| 216 | |
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| 217 | return 0; |
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| 218 | } |
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| 219 | |
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| 220 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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| 221 | if ( buf == NULL ) |
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| 222 | return -1; |
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| 223 | |
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| 224 | *meta = buf->meta; |
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| 225 | |
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| 226 | return 0; |
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| 227 | } |
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| 228 | |
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| 229 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
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| 230 | if ( buf == NULL ) |
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| 231 | return -1; |
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| 232 | |
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| 233 | buf->user_len = len; |
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| 234 | |
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| 235 | return 0; |
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| 236 | } |
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| 237 | |
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| 238 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
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| 239 | if ( buf == NULL ) |
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| 240 | return -1; |
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| 241 | |
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| 242 | *len = buf->user_len; |
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| 243 | |
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| 244 | return 0; |
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| 245 | } |
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| 246 | |
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[46] | 247 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
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| 248 | struct roar_buffer * cur = buf; |
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| 249 | struct roar_buffer * new; |
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[48] | 250 | void * od, * nd; |
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[46] | 251 | |
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| 252 | *copy = NULL; |
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| 253 | |
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| 254 | while (cur) { |
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| 255 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
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| 256 | roar_buffer_free(*copy); |
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| 257 | return -1; |
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| 258 | } |
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| 259 | |
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| 260 | if ( *copy == NULL ) |
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| 261 | *copy = new; |
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| 262 | |
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[48] | 263 | roar_buffer_get_data(cur, &od); |
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| 264 | roar_buffer_get_data(new, &nd); |
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| 265 | memcpy(nd, od, cur->user_len); |
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| 266 | |
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[46] | 267 | roar_buffer_add(*copy, new); |
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| 268 | |
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| 269 | cur = cur->next; |
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| 270 | } |
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| 271 | return 0; |
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| 272 | } |
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| 273 | |
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[7] | 274 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
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| 275 | if ( buf == NULL ) |
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| 276 | return -1; |
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| 277 | |
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| 278 | stats->parts = 0; |
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| 279 | stats->bytes = 0; |
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| 280 | stats->memory_usage = 0; |
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| 281 | |
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| 282 | while (buf) { |
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| 283 | stats->parts++; |
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| 284 | stats->bytes += buf->user_len; |
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| 285 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
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| 286 | buf = buf->next; |
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| 287 | } |
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| 288 | |
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| 289 | return 0; |
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| 290 | } |
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| 291 | |
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[0] | 292 | //ll |
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