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154 lines
5.3 KiB
154 lines
5.3 KiB
/* |
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Copyright (c) 2012, Broadcom Europe Ltd |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of the copyright holder nor the |
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names of its contributors may be used to endorse or promote products |
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derived from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <stdlib.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include <limits.h> |
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#include "containers/containers.h" |
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#include "containers/core/containers_common.h" |
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#include "containers/core/containers_io.h" |
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#include "containers/core/containers_uri.h" |
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typedef struct VC_CONTAINER_IO_MODULE_T |
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{ |
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FILE *stream; |
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} VC_CONTAINER_IO_MODULE_T; |
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VC_CONTAINER_STATUS_T vc_container_io_file_open( VC_CONTAINER_IO_T *, const char *, |
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VC_CONTAINER_IO_MODE_T ); |
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/*****************************************************************************/ |
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static VC_CONTAINER_STATUS_T io_file_close( VC_CONTAINER_IO_T *p_ctx ) |
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{ |
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VC_CONTAINER_IO_MODULE_T *module = p_ctx->module; |
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fclose(module->stream); |
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free(module); |
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return VC_CONTAINER_SUCCESS; |
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} |
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/*****************************************************************************/ |
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static size_t io_file_read(VC_CONTAINER_IO_T *p_ctx, void *buffer, size_t size) |
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{ |
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size_t ret = fread(buffer, 1, size, p_ctx->module->stream); |
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if(ret != size) |
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{ |
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/* Sanity check return value. Some platforms (e.g. Android) can return -1 */ |
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if( ((int)ret) < 0 ) ret = 0; |
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if( feof(p_ctx->module->stream) ) p_ctx->status = VC_CONTAINER_ERROR_EOS; |
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else p_ctx->status = VC_CONTAINER_ERROR_FAILED; |
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} |
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return ret; |
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} |
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/*****************************************************************************/ |
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static size_t io_file_write(VC_CONTAINER_IO_T *p_ctx, const void *buffer, size_t size) |
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{ |
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return fwrite(buffer, 1, size, p_ctx->module->stream); |
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} |
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/*****************************************************************************/ |
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static VC_CONTAINER_STATUS_T io_file_seek(VC_CONTAINER_IO_T *p_ctx, int64_t offset) |
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{ |
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VC_CONTAINER_STATUS_T status = VC_CONTAINER_SUCCESS; |
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int ret; |
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//FIXME: large file support |
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#ifdef _VIDEOCORE |
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extern int fseek64(FILE *fp, int64_t offset, int whence); |
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ret = fseek64(p_ctx->module->stream, offset, SEEK_SET); |
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#else |
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if (offset > (int64_t)UINT_MAX) |
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{ |
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p_ctx->status = VC_CONTAINER_ERROR_EOS; |
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return VC_CONTAINER_ERROR_EOS; |
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} |
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ret = fseek(p_ctx->module->stream, (long)offset, SEEK_SET); |
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#endif |
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if(ret) |
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{ |
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if( feof(p_ctx->module->stream) ) status = VC_CONTAINER_ERROR_EOS; |
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else status = VC_CONTAINER_ERROR_FAILED; |
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} |
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p_ctx->status = status; |
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return status; |
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} |
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/*****************************************************************************/ |
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VC_CONTAINER_STATUS_T vc_container_io_file_open( VC_CONTAINER_IO_T *p_ctx, |
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const char *unused, VC_CONTAINER_IO_MODE_T mode ) |
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{ |
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VC_CONTAINER_STATUS_T status = VC_CONTAINER_SUCCESS; |
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VC_CONTAINER_IO_MODULE_T *module = 0; |
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const char *psz_mode = mode == VC_CONTAINER_IO_MODE_WRITE ? "wb+" : "rb"; |
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const char *uri = p_ctx->uri; |
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FILE *stream = 0; |
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VC_CONTAINER_PARAM_UNUSED(unused); |
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if(vc_uri_path(p_ctx->uri_parts)) |
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uri = vc_uri_path(p_ctx->uri_parts); |
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stream = fopen(uri, psz_mode); |
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if(!stream) { status = VC_CONTAINER_ERROR_URI_NOT_FOUND; goto error; } |
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/* Turn off buffering. The container layer will provide its own cache */ |
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setvbuf(stream, NULL, _IONBF, 0); |
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module = malloc( sizeof(*module) ); |
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if(!module) { status = VC_CONTAINER_ERROR_OUT_OF_MEMORY; goto error; } |
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memset(module, 0, sizeof(*module)); |
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p_ctx->module = module; |
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module->stream = stream; |
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p_ctx->pf_close = io_file_close; |
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p_ctx->pf_read = io_file_read; |
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p_ctx->pf_write = io_file_write; |
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p_ctx->pf_seek = io_file_seek; |
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if(mode == VC_CONTAINER_IO_MODE_WRITE) |
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{ |
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p_ctx->max_size = (1UL<<31)-1; /* For now limit to 2GB */ |
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} |
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else |
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{ |
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//FIXME: large file support, platform-specific file size |
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fseek(p_ctx->module->stream, 0, SEEK_END); |
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p_ctx->size = ftell(p_ctx->module->stream); |
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fseek(p_ctx->module->stream, 0, SEEK_SET); |
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} |
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p_ctx->capabilities = VC_CONTAINER_IO_CAPS_NO_CACHING; |
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return VC_CONTAINER_SUCCESS; |
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error: |
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if(stream) fclose(stream); |
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return status; |
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}
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