[4824] | 1 | //vio_misc.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011 |
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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, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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| 38 | static ssize_t roar_vio_misc_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 39 | struct roar_vio_misc * self = vio->inst; |
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| 40 | |
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| 41 | if ( self->read == NULL ) |
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| 42 | return -1; |
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| 43 | |
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| 44 | return self->read(buf, count, vio, self); |
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| 45 | } |
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| 46 | |
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| 47 | static ssize_t roar_vio_misc_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 48 | struct roar_vio_misc * self = vio->inst; |
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| 49 | |
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| 50 | if ( self->write == NULL ) |
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| 51 | return -1; |
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| 52 | |
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| 53 | return self->write(buf, count, vio, self); |
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| 54 | } |
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| 55 | |
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| 56 | static off_t roar_vio_misc_lseek (struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 57 | return 0; |
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| 58 | } |
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| 59 | |
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| 60 | static int roar_vio_misc_nonblock(struct roar_vio_calls * vio, int state) { |
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| 61 | struct roar_vio_misc * self = vio->inst; |
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| 62 | |
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| 63 | if ( self->support_nonblocking ) |
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| 64 | return 0; |
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| 65 | |
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| 66 | if ( state == ROAR_SOCKET_BLOCK ) |
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| 67 | return 0; |
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| 68 | |
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| 69 | return -1; |
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| 70 | } |
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| 71 | |
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| 72 | static int roar_vio_misc_sync (struct roar_vio_calls * vio) { |
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| 73 | return 0; |
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| 74 | } |
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| 75 | |
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| 76 | static int roar_vio_misc_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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[4826] | 77 | struct roar_vio_misc * self = vio->inst; |
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| 78 | |
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| 79 | if ( vio == NULL || cmd == -1 ) |
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| 80 | return -1; |
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| 81 | |
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| 82 | switch (cmd) { |
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| 83 | case ROAR_VIO_CTL_GET_NAME: |
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| 84 | if ( data == NULL ) |
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| 85 | return -1; |
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| 86 | |
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| 87 | *(const char**)data = self->name; |
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| 88 | return 0; |
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| 89 | break; |
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| 90 | case ROAR_VIO_CTL_SET_NOSYNC: |
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| 91 | vio->sync = NULL; |
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| 92 | return 0; |
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| 93 | break; |
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| 94 | } |
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| 95 | |
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[4824] | 96 | return -1; |
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| 97 | } |
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| 98 | |
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| 99 | static int roar_vio_misc_close (struct roar_vio_calls * vio) { |
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| 100 | return 0; |
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| 101 | } |
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| 102 | |
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| 103 | int roar_vio_open_misc (struct roar_vio_calls * calls, const struct roar_vio_misc * callbacks) { |
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| 104 | if ( calls == NULL || callbacks == NULL ) |
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| 105 | return -1; |
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| 106 | |
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| 107 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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| 108 | calls->read = roar_vio_misc_read; |
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| 109 | calls->write = roar_vio_misc_write; |
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| 110 | calls->lseek = roar_vio_misc_lseek; |
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| 111 | calls->nonblock = roar_vio_misc_nonblock; |
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| 112 | calls->sync = roar_vio_misc_sync; |
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| 113 | calls->ctl = roar_vio_misc_ctl; |
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| 114 | calls->close = roar_vio_misc_close; |
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| 115 | calls->inst = (void*)callbacks; |
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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 | static ssize_t roar_vio_misc_op_return_len (void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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| 121 | return len; |
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| 122 | } |
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| 123 | |
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| 124 | static ssize_t roar_vio_misc_op_return_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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| 125 | return 0; |
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| 126 | } |
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| 127 | |
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| 128 | static ssize_t roar_vio_misc_op_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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| 129 | memset(buf, 0, len); |
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| 130 | return len; |
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| 131 | } |
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| 132 | |
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[4876] | 133 | static ssize_t roar_vio_misc_op_full(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) |
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| 134 | { |
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| 135 | roar_err_set(ROAR_ERROR_NOSPC); |
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| 136 | return -1; |
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| 137 | } |
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| 138 | |
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[4824] | 139 | static ssize_t roar_vio_misc_op_random_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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| 140 | if ( roar_random_gen_nonce(buf, len) == -1 ) |
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| 141 | return -1; |
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| 142 | |
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| 143 | return len; |
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| 144 | } |
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| 145 | |
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| 146 | static ssize_t roar_vio_misc_op_random_salt_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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| 147 | if ( roar_random_salt_nonce(buf, len) == -1 ) |
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| 148 | return -1; |
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| 149 | |
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| 150 | return len; |
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| 151 | } |
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| 152 | |
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| 153 | static const struct roar_vio_misc libroar_vio_miscs[] = { |
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| 154 | {.name = "null", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_return_len}, |
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[4876] | 155 | {.name = "full", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_full}, |
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[4824] | 156 | {.name = "zero", .support_nonblocking = 1, .read = roar_vio_misc_op_zero, .write = roar_vio_misc_op_return_len}, |
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| 157 | {.name = "nrandom", .support_nonblocking = 1, |
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| 158 | .read = roar_vio_misc_op_random_nonce, .write = roar_vio_misc_op_random_salt_nonce} |
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| 159 | }; |
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| 160 | |
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| 161 | int roar_vio_open_misc_by_name(struct roar_vio_calls * calls, const char * name) { |
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| 162 | size_t i; |
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| 163 | |
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| 164 | if ( calls == NULL || name == NULL ) |
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| 165 | return -1; |
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| 166 | |
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| 167 | for (i = 0; i < (sizeof(libroar_vio_miscs)/sizeof(*libroar_vio_miscs)); i++) |
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| 168 | if ( !strcasecmp(name, libroar_vio_miscs[i].name) ) |
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| 169 | return roar_vio_open_misc(calls, &(libroar_vio_miscs[i])); |
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| 170 | |
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| 171 | return -1; |
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| 172 | } |
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| 173 | |
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| 174 | //ll |
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