[590] | 1 | //vio.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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[590] | 35 | #include "libroar.h" |
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| 36 | |
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[591] | 37 | int roar_vio_init_calls (struct roar_vio_calls * calls) { |
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[1118] | 38 | if ( calls == NULL ) |
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[591] | 39 | return -1; |
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| 40 | |
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| 41 | memset((void*)calls, 0, sizeof(struct roar_vio_calls)); |
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| 42 | |
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[881] | 43 | /* |
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[597] | 44 | calls->read = (ssize_t (*)(int fd, void *buf, size_t count, void * inst))read; |
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| 45 | calls->write = (ssize_t (*)(int fd, void *buf, size_t count, void * inst))write; |
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| 46 | calls->lseek = (off_t (*)(int fildes, off_t offset, int whence, void * inst))lseek; |
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[881] | 47 | */ |
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| 48 | |
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[1118] | 49 | calls->read = roar_vio_basic_read; |
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| 50 | calls->write = roar_vio_basic_write; |
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| 51 | calls->lseek = roar_vio_basic_lseek; |
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| 52 | calls->nonblock = roar_vio_basic_nonblock; |
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| 53 | calls->sync = roar_vio_basic_sync; |
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[1241] | 54 | calls->close = roar_vio_basic_close; |
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[881] | 55 | |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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| 59 | int roar_vio_set_inst (struct roar_vio_calls * vio, void * inst) { |
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| 60 | if ( vio == NULL ) |
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| 61 | return -1; |
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| 62 | |
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| 63 | vio->inst = inst; |
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[591] | 64 | |
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| 65 | return 0; |
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| 66 | } |
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| 67 | |
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[881] | 68 | int roar_vio_set_fh (struct roar_vio_calls * vio, int fh) { |
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[989] | 69 | return roar_vio_set_inst(vio, (void*)(ROAR_INSTINT)(fh + 1)); |
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[881] | 70 | } |
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| 71 | |
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| 72 | int roar_vio_get_fh (struct roar_vio_calls * vio) { |
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| 73 | if ( vio == NULL ) |
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| 74 | return -1; |
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| 75 | |
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[989] | 76 | return ((int)(ROAR_INSTINT)vio->inst) - 1; |
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[881] | 77 | } |
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| 78 | |
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| 79 | |
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| 80 | ssize_t roar_vio_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 81 | if ( vio == NULL ) |
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| 82 | return -1; |
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| 83 | |
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| 84 | if ( vio->read == NULL ) |
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| 85 | return -1; |
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| 86 | |
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| 87 | return vio->read(vio, buf, count); |
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| 88 | } |
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| 89 | |
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| 90 | ssize_t roar_vio_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 91 | if ( vio == NULL ) |
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| 92 | return -1; |
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| 93 | |
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| 94 | if ( vio->write == NULL ) |
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| 95 | return -1; |
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| 96 | |
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| 97 | return vio->write(vio, buf, count); |
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| 98 | } |
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| 99 | |
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| 100 | off_t roar_vio_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 101 | if ( vio == NULL ) |
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| 102 | return -1; |
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| 103 | |
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| 104 | if ( vio->lseek == NULL ) |
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| 105 | return -1; |
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| 106 | |
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| 107 | return vio->lseek(vio, offset, whence); |
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| 108 | } |
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| 109 | |
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[1118] | 110 | int roar_vio_nonblock(struct roar_vio_calls * vio, int state) { |
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| 111 | if ( vio == NULL ) |
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| 112 | return -1; |
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| 113 | |
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| 114 | if ( vio->nonblock == NULL ) |
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| 115 | return -1; |
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| 116 | |
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| 117 | return vio->nonblock(vio, state); |
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| 118 | } |
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| 119 | |
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| 120 | int roar_vio_sync (struct roar_vio_calls * vio) { |
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| 121 | if ( vio == NULL ) |
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| 122 | return -1; |
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| 123 | |
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| 124 | if ( vio->sync == NULL ) |
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| 125 | return -1; |
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| 126 | |
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| 127 | return vio->sync(vio); |
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| 128 | } |
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| 129 | |
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[1140] | 130 | int roar_vio_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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| 131 | if ( vio == NULL ) |
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| 132 | return -1; |
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| 133 | |
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| 134 | if ( vio->ctl == NULL ) |
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| 135 | return -1; |
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| 136 | |
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| 137 | return vio->ctl(vio, cmd, data); |
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| 138 | } |
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| 139 | |
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[1241] | 140 | int roar_vio_close (struct roar_vio_calls * vio) { |
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| 141 | if ( vio == NULL ) |
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| 142 | return -1; |
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| 143 | |
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[1258] | 144 | if ( vio->close == NULL ) |
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[1241] | 145 | return -1; |
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| 146 | |
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| 147 | return vio->close(vio); |
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| 148 | } |
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| 149 | |
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[1252] | 150 | // converters: |
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| 151 | int roar_vio_open_file (struct roar_vio_calls * calls, char * filename, int flags, mode_t mode) { |
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| 152 | int fh; |
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| 153 | |
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| 154 | if ( calls == NULL || filename == NULL ) |
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| 155 | return -1; |
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| 156 | |
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| 157 | if ( (fh = open(filename, flags, mode)) == -1 ) |
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| 158 | return -1; |
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| 159 | |
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| 160 | if ( roar_vio_open_fh(calls, fh) == -1 ) { |
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| 161 | close(fh); |
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| 162 | return -1; |
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| 163 | } |
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| 164 | |
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| 165 | return 0; |
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| 166 | } |
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| 167 | |
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| 168 | int roar_vio_open_fh (struct roar_vio_calls * calls, int fh) { |
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| 169 | if ( calls == NULL ) |
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| 170 | return -1; |
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| 171 | |
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| 172 | if ( roar_vio_init_calls(calls) == -1 ) |
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| 173 | return -1; |
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| 174 | |
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| 175 | return roar_vio_set_fh(calls, fh); |
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| 176 | } |
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| 177 | |
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| 178 | int roar_vio_open_stdio (struct roar_vio_calls * calls, FILE * dst) { |
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| 179 | if ( calls == NULL || dst == NULL ) |
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| 180 | return -1; |
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| 181 | |
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[1253] | 182 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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| 183 | |
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| 184 | calls->read = roar_vio_stdio_read; |
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| 185 | calls->write = roar_vio_stdio_write; |
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| 186 | calls->lseek = roar_vio_stdio_lseek; |
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| 187 | calls->sync = roar_vio_stdio_sync; |
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| 188 | calls->close = roar_vio_stdio_close; |
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| 189 | |
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| 190 | calls->inst = dst; |
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| 191 | |
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| 192 | return 0; |
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[1252] | 193 | } |
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| 194 | |
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| 195 | FILE * roar_vio_to_stdio (struct roar_vio_calls * calls, int flags) { |
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| 196 | #ifdef ROAR_HAVE_FOPENCOOKIE |
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| 197 | cookie_io_functions_t foc_funcs; |
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| 198 | #endif |
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| 199 | |
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| 200 | if ( calls == NULL ) |
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| 201 | return NULL; |
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| 202 | |
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| 203 | #if defined(ROAR_HAVE_FOPENCOOKIE) |
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| 204 | memset(&foc_funcs, 0, sizeof(cookie_io_functions_t)); |
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| 205 | |
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| 206 | return fopencookie((void*) calls, "rw", foc_funcs); |
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| 207 | #elif defined(ROAR_HAVE_FUNOPEN) |
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| 208 | return funopen((void*) calls, NULL /* read */, NULL /* write */, NULL /* lseek */, NULL /* close */); |
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| 209 | #else |
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| 210 | return NULL; |
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| 211 | #endif |
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| 212 | } |
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| 213 | |
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[886] | 214 | // VIOs: |
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[881] | 215 | |
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[886] | 216 | // basic |
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[881] | 217 | ssize_t roar_vio_basic_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 218 | return read(roar_vio_get_fh(vio), buf, count); |
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| 219 | } |
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| 220 | |
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| 221 | ssize_t roar_vio_basic_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 222 | return write(roar_vio_get_fh(vio), buf, count); |
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| 223 | } |
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| 224 | |
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| 225 | off_t roar_vio_basic_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 226 | return lseek(roar_vio_get_fh(vio), offset, whence); |
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| 227 | } |
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| 228 | |
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[1118] | 229 | int roar_vio_basic_nonblock(struct roar_vio_calls * vio, int state) { |
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| 230 | if ( roar_socket_nonblock(roar_vio_get_fh(vio), state) == -1 ) |
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| 231 | return -1; |
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| 232 | |
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| 233 | if ( state == ROAR_SOCKET_NONBLOCK ) |
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| 234 | return 0; |
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| 235 | |
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[1125] | 236 | roar_vio_sync(vio); |
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| 237 | |
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| 238 | return 0; |
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[1118] | 239 | } |
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| 240 | |
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| 241 | int roar_vio_basic_sync (struct roar_vio_calls * vio) { |
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[1171] | 242 | return ROAR_FDATASYNC(roar_vio_get_fh(vio)); |
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[1118] | 243 | } |
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| 244 | |
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[1241] | 245 | int roar_vio_basic_close (struct roar_vio_calls * vio) { |
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| 246 | return close(roar_vio_get_fh(vio)); |
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| 247 | } |
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| 248 | |
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[943] | 249 | // null |
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| 250 | ssize_t roar_vio_null_rw (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 251 | if ( vio == NULL || buf == NULL ) |
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| 252 | return -1; |
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| 253 | |
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| 254 | return 0; |
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| 255 | } |
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| 256 | |
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[886] | 257 | // pass |
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[1247] | 258 | int roar_vio_open_pass (struct roar_vio_calls * calls, struct roar_vio_calls * dst) { |
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| 259 | if ( calls == NULL ) |
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| 260 | return -1; |
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| 261 | |
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| 262 | memset((void*)calls, 0, sizeof(struct roar_vio_calls)); |
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| 263 | |
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| 264 | calls->read = roar_vio_pass_read; |
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| 265 | calls->write = roar_vio_pass_write; |
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| 266 | calls->lseek = roar_vio_pass_lseek; |
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| 267 | calls->nonblock = roar_vio_pass_nonblock; |
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| 268 | calls->sync = roar_vio_pass_sync; |
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| 269 | calls->close = roar_vio_pass_close; |
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| 270 | |
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| 271 | calls->inst = dst; |
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| 272 | |
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| 273 | return 0; |
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| 274 | } |
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| 275 | |
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[886] | 276 | ssize_t roar_vio_pass_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 277 | return roar_vio_read((struct roar_vio_calls *) vio->inst, buf, count); |
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| 278 | } |
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| 279 | |
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| 280 | ssize_t roar_vio_pass_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 281 | return roar_vio_write((struct roar_vio_calls *) vio->inst, buf, count); |
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| 282 | } |
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| 283 | |
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| 284 | off_t roar_vio_pass_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 285 | return roar_vio_lseek((struct roar_vio_calls *) vio->inst, offset, whence); |
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| 286 | } |
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| 287 | |
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[1241] | 288 | int roar_vio_pass_nonblock(struct roar_vio_calls * vio, int state) { |
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| 289 | return roar_vio_nonblock((struct roar_vio_calls *) vio->inst, state); |
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| 290 | } |
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| 291 | |
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| 292 | int roar_vio_pass_sync (struct roar_vio_calls * vio) { |
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| 293 | return roar_vio_sync((struct roar_vio_calls *) vio->inst); |
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| 294 | } |
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| 295 | |
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| 296 | int roar_vio_pass_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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| 297 | return roar_vio_ctl((struct roar_vio_calls *) vio->inst, cmd, data); |
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| 298 | } |
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| 299 | |
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| 300 | int roar_vio_pass_close (struct roar_vio_calls * vio) { |
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| 301 | return roar_vio_close((struct roar_vio_calls *) vio->inst); |
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| 302 | } |
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| 303 | |
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[886] | 304 | |
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| 305 | // re |
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[1247] | 306 | int roar_vio_open_re (struct roar_vio_calls * calls, struct roar_vio_calls * dst) { |
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| 307 | if ( roar_vio_open_pass(calls, dst) == -1 ) |
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| 308 | return -1; |
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| 309 | |
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| 310 | calls->read = roar_vio_re_read; |
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| 311 | calls->write = roar_vio_re_write; |
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| 312 | calls->lseek = roar_vio_re_lseek; |
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| 313 | |
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| 314 | return 0; |
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| 315 | } |
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[886] | 316 | ssize_t roar_vio_re_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 317 | size_t len = 0; |
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| 318 | ssize_t r = -1; |
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| 319 | |
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| 320 | if ( vio == NULL ) |
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| 321 | return -1; |
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| 322 | |
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| 323 | if ( vio->inst == NULL ) |
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| 324 | return -1; |
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| 325 | |
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| 326 | errno = 0; |
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| 327 | |
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| 328 | while ( (r = roar_vio_read((struct roar_vio_calls *) vio->inst, buf, count)) > 0 ) { |
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| 329 | len += r; |
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| 330 | buf += r; |
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| 331 | count -= r; |
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| 332 | if ( count == 0 ) |
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| 333 | break; |
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| 334 | } |
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| 335 | |
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| 336 | if ( len == 0 && r == -1 ) |
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| 337 | return -1; |
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| 338 | |
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| 339 | return len; |
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| 340 | } |
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| 341 | |
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| 342 | ssize_t roar_vio_re_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 343 | size_t len = 0; |
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| 344 | ssize_t r = -1; |
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| 345 | |
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| 346 | if ( vio == NULL ) |
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| 347 | return -1; |
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| 348 | |
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| 349 | if ( vio->inst == NULL ) |
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| 350 | return -1; |
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| 351 | |
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| 352 | errno = 0; |
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| 353 | |
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| 354 | while ( (r = roar_vio_write((struct roar_vio_calls *) vio->inst, buf, count)) > 0 ) { |
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| 355 | len += r; |
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| 356 | buf += r; |
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| 357 | count -= r; |
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| 358 | if ( count == 0 ) |
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| 359 | break; |
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| 360 | } |
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| 361 | |
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| 362 | if ( len == 0 && r == -1 ) |
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| 363 | return -1; |
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| 364 | |
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| 365 | return len; |
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| 366 | } |
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| 367 | |
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[1247] | 368 | // TODO: we should do a some more intelgent thing here. |
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[886] | 369 | off_t roar_vio_re_lseek(struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 370 | return roar_vio_lseek((struct roar_vio_calls *) vio->inst, offset, whence); |
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| 371 | } |
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| 372 | |
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[1253] | 373 | // stdio: |
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| 374 | ssize_t roar_vio_stdio_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 375 | return fread(buf, 1, count, (FILE*)(vio->inst)); |
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| 376 | } |
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| 377 | |
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| 378 | ssize_t roar_vio_stdio_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 379 | return fwrite(buf, 1, count, (FILE*)(vio->inst)); |
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| 380 | } |
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| 381 | |
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| 382 | off_t roar_vio_stdio_lseek (struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 383 | if ( fseek((FILE*)(vio->inst), offset, whence) == -1 ) |
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| 384 | return -1; |
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| 385 | |
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| 386 | return ftell((FILE*)(vio->inst)); |
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| 387 | } |
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| 388 | |
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| 389 | int roar_vio_stdio_sync (struct roar_vio_calls * vio) { |
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| 390 | return fflush((FILE*)(vio->inst)); |
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| 391 | } |
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| 392 | |
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| 393 | int roar_vio_stdio_close (struct roar_vio_calls * vio) { |
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| 394 | return fclose((FILE*)(vio->inst)); |
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| 395 | } |
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[886] | 396 | |
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[590] | 397 | //ll |
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