| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (nbio_orbis.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <file/nbio.h> |
| 24 | |
| 25 | #if defined(ORBIS) |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <orbisFile.h> |
| 29 | #include <unistd.h> |
| 30 | #include <sys/fcntl.h> |
| 31 | |
| 32 | struct nbio_orbis_t |
| 33 | { |
| 34 | void* data; |
| 35 | size_t progress; |
| 36 | size_t len; |
| 37 | int fd; |
| 38 | unsigned int mode; |
| 39 | /* |
| 40 | * possible values: |
| 41 | * NBIO_READ, NBIO_WRITE - obvious |
| 42 | * -1 - currently doing nothing |
| 43 | * -2 - the pointer was reallocated since the last operation |
| 44 | */ |
| 45 | signed char op; |
| 46 | }; |
| 47 | |
| 48 | static void *nbio_orbis_open(const char * filename, unsigned int mode) |
| 49 | { |
| 50 | static const int o_flags[] = { O_RDONLY, O_RDWR | O_CREAT | O_TRUNC, |
| 51 | O_RDWR, O_RDONLY, O_RDWR | O_CREAT | O_TRUNC }; |
| 52 | void *buf = NULL; |
| 53 | struct nbio_orbis_t* handle = NULL; |
| 54 | size_t len = 0; |
| 55 | int fd = orbisOpen(filename, o_flags[mode], 0644); |
| 56 | |
| 57 | if (fd < 0) |
| 58 | return NULL; |
| 59 | handle = (struct nbio_orbis_t*)malloc(sizeof(struct nbio_orbis_t)); |
| 60 | |
| 61 | if (!handle) |
| 62 | goto error; |
| 63 | |
| 64 | handle->fd = fd; |
| 65 | |
| 66 | switch (mode) |
| 67 | { |
| 68 | case NBIO_WRITE: |
| 69 | case BIO_WRITE: |
| 70 | break; |
| 71 | default: |
| 72 | len=orbisLseek(handle->fd, 0, SEEK_END); |
| 73 | orbisLseek(handle->fd, 0, SEEK_SET); |
| 74 | break; |
| 75 | } |
| 76 | |
| 77 | handle->mode = mode; |
| 78 | |
| 79 | if (len) |
| 80 | buf = malloc(len); |
| 81 | |
| 82 | if (len && !buf) |
| 83 | goto error; |
| 84 | |
| 85 | handle->data = buf; |
| 86 | handle->len = len; |
| 87 | handle->progress = handle->len; |
| 88 | handle->op = -2; |
| 89 | |
| 90 | return handle; |
| 91 | |
| 92 | error: |
| 93 | if (handle) |
| 94 | free(handle); |
| 95 | orbisClose(fd); |
| 96 | return NULL; |
| 97 | } |
| 98 | |
| 99 | static void nbio_orbis_begin_read(void *data) |
| 100 | { |
| 101 | |
| 102 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 103 | if (!handle) |
| 104 | return; |
| 105 | |
| 106 | if (handle->op >= 0) |
| 107 | return; |
| 108 | |
| 109 | orbisLseek(handle->fd, 0, SEEK_SET); |
| 110 | |
| 111 | handle->op = NBIO_READ; |
| 112 | handle->progress = 0; |
| 113 | } |
| 114 | |
| 115 | static void nbio_orbis_begin_write(void *data) |
| 116 | { |
| 117 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 118 | if (!handle) |
| 119 | return; |
| 120 | |
| 121 | if (handle->op >= 0) |
| 122 | return; |
| 123 | |
| 124 | orbisLseek(handle->fd, 0, SEEK_SET); |
| 125 | handle->op = NBIO_WRITE; |
| 126 | handle->progress = 0; |
| 127 | } |
| 128 | |
| 129 | static bool nbio_orbis_iterate(void *data) |
| 130 | { |
| 131 | size_t amount = 65536; |
| 132 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 133 | |
| 134 | if (!handle) |
| 135 | return false; |
| 136 | |
| 137 | if (amount > handle->len - handle->progress) |
| 138 | amount = handle->len - handle->progress; |
| 139 | |
| 140 | switch (handle->op) |
| 141 | { |
| 142 | case NBIO_READ: |
| 143 | if (handle->mode == BIO_READ) |
| 144 | amount = handle->len; |
| 145 | break; |
| 146 | case NBIO_WRITE: |
| 147 | if (handle->mode == BIO_WRITE) |
| 148 | { |
| 149 | size_t written = 0; |
| 150 | amount = handle->len; |
| 151 | written = orbisWrite(handle->fd, (char*)handle->data, amount); |
| 152 | |
| 153 | if (written != amount) |
| 154 | return false; |
| 155 | } |
| 156 | break; |
| 157 | } |
| 158 | |
| 159 | handle->progress += amount; |
| 160 | |
| 161 | if (handle->progress == handle->len) |
| 162 | handle->op = -1; |
| 163 | return (handle->op < 0); |
| 164 | } |
| 165 | |
| 166 | static void nbio_orbis_resize(void *data, size_t len) |
| 167 | { |
| 168 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 169 | if (!handle) |
| 170 | return; |
| 171 | |
| 172 | if (handle->op >= 0) |
| 173 | return; |
| 174 | if (len < handle->len) |
| 175 | return; |
| 176 | |
| 177 | handle->len = len; |
| 178 | handle->data = realloc(handle->data, handle->len); |
| 179 | handle->op = -1; |
| 180 | handle->progress = handle->len; |
| 181 | } |
| 182 | |
| 183 | static void *nbio_orbis_get_ptr(void *data, size_t* len) |
| 184 | { |
| 185 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 186 | if (!handle) |
| 187 | return NULL; |
| 188 | if (len) |
| 189 | *len = handle->len; |
| 190 | if (handle->op == -1) |
| 191 | return handle->data; |
| 192 | return NULL; |
| 193 | } |
| 194 | |
| 195 | static void nbio_orbis_cancel(void *data) |
| 196 | { |
| 197 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 198 | if (!handle) |
| 199 | return; |
| 200 | handle->op = -1; |
| 201 | handle->progress = handle->len; |
| 202 | } |
| 203 | |
| 204 | static void nbio_orbis_free(void *data) |
| 205 | { |
| 206 | struct nbio_orbis_t *handle = (struct nbio_orbis_t*)data; |
| 207 | if (!handle) |
| 208 | return; |
| 209 | |
| 210 | if (handle->op >= 0) |
| 211 | return; |
| 212 | |
| 213 | orbisClose(handle->fd); |
| 214 | free(handle->data); |
| 215 | |
| 216 | handle->data = NULL; |
| 217 | free(handle); |
| 218 | } |
| 219 | |
| 220 | nbio_intf_t nbio_orbis = { |
| 221 | nbio_orbis_open, |
| 222 | nbio_orbis_begin_read, |
| 223 | nbio_orbis_begin_write, |
| 224 | nbio_orbis_iterate, |
| 225 | nbio_orbis_resize, |
| 226 | nbio_orbis_get_ptr, |
| 227 | nbio_orbis_cancel, |
| 228 | nbio_orbis_free, |
| 229 | "nbio_orbis", |
| 230 | }; |
| 231 | #endif |