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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** FileX Component */ |
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/** */ |
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/** File */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define FX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "fx_api.h" |
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#include "fx_system.h" |
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#include "fx_file.h" |
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#include "fx_directory.h" |
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#include "fx_utility.h" |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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#include "fx_fault_tolerant.h" |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_file_write PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* William E. Lamie, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function writes the specified number of bytes into the file's */ |
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/* data area. The status of the write operation is returned to the */ |
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/* caller. In addition, various internal file pointers in the file */ |
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/* control block are also updated. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* file_ptr File control block pointer */ |
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/* buffer_ptr Buffer pointer */ |
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/* size Number of bytes to write */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* return status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _fx_directory_entry_write Update the file's size */ |
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/* _fx_utility_FAT_entry_read Read a FAT entry */ |
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/* _fx_utility_FAT_entry_write Write a FAT entry */ |
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/* _fx_utility_FAT_flush Flush written FAT entries */ |
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/* _fx_utility_logical_sector_flush Flush written logical sectors */ |
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/* _fx_utility_logical_sector_read Read a logical sector */ |
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/* _fx_utility_logical_sector_write Write a logical sector */ |
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/* _fx_utility_memory_copy Fast memory copy routine */ |
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/* _fx_fault_tolerant_transaction_start Start fault tolerant */ |
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/* transaction */ |
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/* _fx_fault_tolerant_transaction_end End fault tolerant transaction*/ |
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/* _fx_fault_tolerant_recover Recover FAT chain */ |
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/* _fx_fault_tolerant_reset_log_file Reset the log file */ |
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/* _fx_fault_tolerant_set_FAT_chain Set data of FAT chain */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */ |
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/* 09-30-2020 William E. Lamie Modified comment(s), verified */ |
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/* memcpy usage, */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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599766 |
UINT _fx_file_write(FX_FILE *file_ptr, VOID *buffer_ptr, ULONG size) |
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{ |
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UINT status; |
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ULONG64 bytes_remaining; |
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ULONG i; |
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ULONG copy_bytes; |
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ULONG bytes_per_cluster; |
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UCHAR *source_ptr; |
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ULONG first_new_cluster; |
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ULONG last_cluster; |
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ULONG cluster, next_cluster; |
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ULONG FAT_index; |
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ULONG FAT_value; |
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ULONG clusters; |
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ULONG total_clusters; |
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UINT sectors; |
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FX_MEDIA *media_ptr; |
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#ifdef FX_FAULT_TOLERANT_DATA |
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FX_INT_SAVE_AREA |
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#endif |
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#ifndef FX_DONT_UPDATE_OPEN_FILES |
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ULONG open_count; |
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FX_FILE *search_ptr; |
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#endif |
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#ifdef TX_ENABLE_EVENT_TRACE |
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TX_TRACE_BUFFER_ENTRY *trace_event; |
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ULONG trace_timestamp; |
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#endif |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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UCHAR data_append = FX_FALSE; /* Whether or not new data would extend beyond the size of the original file. |
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Operations such as append or overwrite could cause the new file to exceed its |
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original size, resulting in data-appending operation. */ |
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ULONG copy_head_cluster = 0; /* The first cluster of the original chain that needs to be replaced. */ |
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ULONG copy_tail_cluster = 0; /* The last cluster of the original chain that needs to be replaced. */ |
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ULONG insertion_back; /* The insertion point (back) */ |
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ULONG insertion_front = 0; /* The insertion point (front) */ |
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ULONG replace_clusters = 0; /* The number of clusters to be replaced. */ |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* First, determine if the file is still open. */ |
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✓✓ |
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if (file_ptr -> fx_file_id != FX_FILE_ID) |
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{ |
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/* Return the file not open error status. */ |
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return(FX_NOT_OPEN); |
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} |
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/* Setup pointer to media structure. */ |
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media_ptr = file_ptr -> fx_file_media_ptr; |
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#ifndef FX_MEDIA_STATISTICS_DISABLE |
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/* Increment the number of times this service has been called. */ |
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media_ptr -> fx_media_file_writes++; |
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#endif |
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✓✓ |
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if (file_ptr -> fx_file_current_file_offset + size > 0xFFFFFFFFULL) |
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{ |
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/* Return the no more space error, since the new file size would be larger than |
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the 32-bit field to represent it in the file's directory entry. */ |
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return(FX_NO_MORE_SPACE); |
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} |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Initialize next cluster of tail. */ |
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insertion_back = media_ptr -> fx_media_fat_last; |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_WRITE, file_ptr, buffer_ptr, size, 0, FX_TRACE_FILE_EVENTS, &trace_event, &trace_timestamp) |
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/* Protect against other threads accessing the media. */ |
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FX_PROTECT |
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/* Check for write protect at the media level (set by driver). */ |
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✓✓ |
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if (media_ptr -> fx_media_driver_write_protect) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return write protect error. */ |
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return(FX_WRITE_PROTECT); |
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} |
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/* Make sure this file is open for writing. */ |
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✓✓ |
599763 |
if (file_ptr -> fx_file_open_mode != FX_OPEN_FOR_WRITE) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the access error exception - a write was attempted from |
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a file opened for reading! */ |
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return(FX_ACCESS_ERROR); |
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} |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Start transaction. */ |
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_fx_fault_tolerant_transaction_start(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Calculate the number of bytes per cluster. */ |
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bytes_per_cluster = ((ULONG)media_ptr -> fx_media_bytes_per_sector) * |
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((ULONG)media_ptr -> fx_media_sectors_per_cluster); |
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/* Check for invalid value. */ |
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✓✓ |
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if (bytes_per_cluster == 0) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Invalid media, return error. */ |
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return(FX_MEDIA_INVALID); |
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} |
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/* Initialized first new cluster. */ |
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first_new_cluster = 0; |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Calculate clusters need to be replaced when fault tolerant is enabled. */ |
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if (media_ptr -> fx_media_fault_tolerant_enabled) |
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{ |
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if (file_ptr -> fx_file_current_file_offset == file_ptr -> fx_file_current_file_size) |
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{ |
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/* Appending data. No need to replace existing clusters. */ |
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replace_clusters = 0; |
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} |
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else if (file_ptr -> fx_file_current_file_offset == file_ptr -> fx_file_maximum_size_used) |
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{ |
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/* Similar to append data. No actual data after fx_file_maximum_size_used. |
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* No need to replace existing clusters. */ |
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replace_clusters = 0; |
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} |
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else if (((file_ptr -> fx_file_current_file_offset / media_ptr -> fx_media_bytes_per_sector) == |
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((file_ptr -> fx_file_current_file_offset + size - 1) / media_ptr -> fx_media_bytes_per_sector)) && |
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((file_ptr -> fx_file_current_file_offset + size) <= file_ptr -> fx_file_current_file_size)) |
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{ |
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/* Overwriting data in one sector. No need to replace existing clusters. */ |
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replace_clusters = 0; |
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} |
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else if ((file_ptr -> fx_file_current_available_size - file_ptr -> fx_file_current_file_offset) < size) |
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{ |
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/* Replace all clusters from current_cluster. */ |
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replace_clusters = (UINT)(file_ptr -> fx_file_total_clusters - file_ptr -> fx_file_current_relative_cluster); |
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copy_head_cluster = file_ptr -> fx_file_current_physical_cluster; |
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data_append = FX_TRUE; |
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} |
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else |
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{ |
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/* Replace clusters from current_cluster to the end of written cluster. */ |
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replace_clusters = (UINT)((file_ptr -> fx_file_current_file_offset + size + bytes_per_cluster - 1) / bytes_per_cluster - |
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file_ptr -> fx_file_current_relative_cluster); |
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copy_head_cluster = file_ptr -> fx_file_current_physical_cluster; |
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data_append = FX_FALSE; |
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} |
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} |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Next, determine if there is enough room to write the specified number of |
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bytes to the clusters already allocated to this file. */ |
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✓✓ |
599761 |
if (((file_ptr -> fx_file_current_available_size - file_ptr -> fx_file_current_file_offset) < size) |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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|| (replace_clusters) |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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) |
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{ |
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/* The new request will not fit within the currently allocated clusters. */ |
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/* Calculate the number of additional clusters that must be allocated for this |
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write request. */ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Find the number of clusters that need to be replaced. */ |
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if (media_ptr -> fx_media_fault_tolerant_enabled) |
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{ |
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/* Mark the recovery phase. */ |
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media_ptr -> fx_media_fault_tolerant_state |= FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN; |
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bytes_remaining = file_ptr -> fx_file_current_file_offset + size; |
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if (replace_clusters > 0) |
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{ |
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/* Find previous cluster of copy head cluster. */ |
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/* The previous cluster is not initialized. Find it. */ |
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if (copy_head_cluster != file_ptr -> fx_file_first_physical_cluster) |
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{ |
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/* The copy head cluster is not the first cluster of file. */ |
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/* Copy head is not the first cluster of file. */ |
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if (file_ptr -> fx_file_current_relative_cluster < file_ptr -> fx_file_consecutive_cluster) |
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{ |
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/* Clusters before current cluster are consecutive. */ |
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insertion_front = copy_head_cluster - 1; |
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bytes_remaining -= file_ptr -> fx_file_current_relative_cluster * bytes_per_cluster; |
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} |
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else |
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{ |
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/* Skip consecutive clusters first. */ |
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cluster = file_ptr -> fx_file_first_physical_cluster; |
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/* Loop the link of FAT to find the previous cluster. */ |
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while ((cluster >= FX_FAT_ENTRY_START) && (cluster < media_ptr -> fx_media_fat_reserved)) |
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{ |
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/* Reduce remaining bytes. */ |
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bytes_remaining -= bytes_per_cluster; |
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329 |
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/* Read the current cluster entry from the FAT. */ |
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status = _fx_utility_FAT_entry_read(media_ptr, cluster, &FAT_value); |
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/* Check the return value. */ |
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if (status != FX_SUCCESS) |
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{ |
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336 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the error status. */ |
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return(status); |
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} |
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if (FAT_value == copy_head_cluster) |
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{ |
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break; |
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} |
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350 |
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/* Move to next cluster. */ |
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cluster = FAT_value; |
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} |
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if ((cluster >= FX_FAT_ENTRY_START) && (cluster < media_ptr -> fx_media_fat_reserved)) |
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{ |
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/* Find the previous cluster. */ |
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insertion_front = cluster; |
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} |
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else |
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{ |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the error status. */ |
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return(FX_NOT_FOUND); |
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} |
371 |
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} |
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} |
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374 |
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/* Find copy tail cluster. */ |
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if (bytes_remaining <= bytes_per_cluster) |
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{ |
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/* Only one cluster is modified. */ |
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copy_tail_cluster = copy_head_cluster; |
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} |
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else if (data_append == FX_FALSE) |
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{ |
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/* Search from copy head cluster. */ |
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cluster = copy_head_cluster; |
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FAT_value = FX_FAT_ENTRY_START; |
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388 |
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/* Loop the link of FAT to find the previous cluster. */ |
389 |
|
|
while ((cluster >= FX_FAT_ENTRY_START) && (cluster < media_ptr -> fx_media_fat_reserved)) |
390 |
|
|
{ |
391 |
|
|
|
392 |
|
|
if (bytes_remaining <= bytes_per_cluster) |
393 |
|
|
{ |
394 |
|
|
break; |
395 |
|
|
} |
396 |
|
|
|
397 |
|
|
/* Reduce remaining bytes. */ |
398 |
|
|
bytes_remaining -= bytes_per_cluster; |
399 |
|
|
|
400 |
|
|
/* Read the current cluster entry from the FAT. */ |
401 |
|
|
status = _fx_utility_FAT_entry_read(media_ptr, cluster, &FAT_value); |
402 |
|
|
|
403 |
|
|
/* Check the return value. */ |
404 |
|
|
if (status != FX_SUCCESS) |
405 |
|
|
{ |
406 |
|
|
|
407 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
408 |
|
|
|
409 |
|
|
/* Release media protection. */ |
410 |
|
|
FX_UNPROTECT |
411 |
|
|
|
412 |
|
|
/* Return the error status. */ |
413 |
|
|
return(status); |
414 |
|
|
} |
415 |
|
|
|
416 |
|
|
/* Move to next cluster. */ |
417 |
|
|
cluster = FAT_value; |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
/* Find the previous cluster. */ |
421 |
|
|
copy_tail_cluster = FAT_value; |
422 |
|
|
} |
423 |
|
|
|
424 |
|
|
/* Get the cluster next to copy tail. */ |
425 |
|
|
if (data_append == FX_FALSE) |
426 |
|
|
{ |
427 |
|
|
|
428 |
|
|
/* Read FAT entry. */ |
429 |
|
|
status = _fx_utility_FAT_entry_read(media_ptr, copy_tail_cluster, &insertion_back); |
430 |
|
|
|
431 |
|
|
/* Check for a bad status. */ |
432 |
|
|
if (status != FX_SUCCESS) |
433 |
|
|
{ |
434 |
|
|
|
435 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
436 |
|
|
|
437 |
|
|
/* Release media protection. */ |
438 |
|
|
FX_UNPROTECT |
439 |
|
|
|
440 |
|
|
/* Return the bad status. */ |
441 |
|
|
return(status); |
442 |
|
|
} |
443 |
|
|
} |
444 |
|
|
else |
445 |
|
|
{ |
446 |
|
|
insertion_back = media_ptr -> fx_media_fat_last; |
447 |
|
|
} |
448 |
|
|
} |
449 |
|
|
else |
450 |
|
|
{ |
451 |
|
|
insertion_back = media_ptr -> fx_media_fat_last; |
452 |
|
|
} |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
if (file_ptr -> fx_file_current_available_size - file_ptr -> fx_file_current_file_offset < size) |
456 |
|
|
{ |
457 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
458 |
|
|
/* Calculate clusters that are needed for data append except ones overwritten. */ |
459 |
|
59282 |
clusters = (UINT)((size + (bytes_per_cluster - 1) - |
460 |
|
59282 |
(file_ptr -> fx_file_current_available_size - file_ptr -> fx_file_current_file_offset)) / |
461 |
|
|
bytes_per_cluster); |
462 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
463 |
|
|
} |
464 |
|
|
else |
465 |
|
|
{ |
466 |
|
|
clusters = 0; |
467 |
|
|
} |
468 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
469 |
|
|
|
470 |
|
|
/* Determine if we have enough space left. */ |
471 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
472 |
|
|
if (clusters + replace_clusters > media_ptr -> fx_media_available_clusters) |
473 |
|
|
#else |
474 |
✓✓ |
59282 |
if (clusters > media_ptr -> fx_media_available_clusters) |
475 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
476 |
|
|
{ |
477 |
|
|
|
478 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
479 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
480 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
481 |
|
|
|
482 |
|
|
/* Release media protection. */ |
483 |
|
2 |
FX_UNPROTECT |
484 |
|
|
|
485 |
|
|
/* Out of disk space. */ |
486 |
|
2 |
return(FX_NO_MORE_SPACE); |
487 |
|
|
} |
488 |
|
|
|
489 |
|
|
/* Update the file total cluster count. */ |
490 |
|
59280 |
file_ptr -> fx_file_total_clusters = file_ptr -> fx_file_total_clusters + clusters; |
491 |
|
|
|
492 |
|
|
/* Check for wrap-around when updating the available size. */ |
493 |
✓✓ |
59280 |
if (file_ptr -> fx_file_current_available_size + (ULONG64)bytes_per_cluster * (ULONG64)clusters > 0xFFFFFFFFULL) |
494 |
|
|
{ |
495 |
|
|
|
496 |
|
|
/* 32-bit wrap around condition is present. Just set the available file size to all ones, which is |
497 |
|
|
the maximum file size. */ |
498 |
|
1 |
file_ptr -> fx_file_current_available_size = 0xFFFFFFFFULL; |
499 |
|
|
} |
500 |
|
|
else |
501 |
|
|
{ |
502 |
|
|
|
503 |
|
|
/* Normal condition, update the available size. */ |
504 |
|
59279 |
file_ptr -> fx_file_current_available_size = |
505 |
|
59279 |
file_ptr -> fx_file_current_available_size + (ULONG64)bytes_per_cluster * (ULONG64)clusters; |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
509 |
|
|
/* Account for newly allocated clusters. */ |
510 |
|
|
clusters += replace_clusters; |
511 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
512 |
|
|
|
513 |
|
|
/* Decrease the available clusters in the media control block. */ |
514 |
|
59280 |
media_ptr -> fx_media_available_clusters = media_ptr -> fx_media_available_clusters - clusters; |
515 |
|
|
|
516 |
|
|
|
517 |
|
|
/* Search for the additional clusters we need. */ |
518 |
|
59280 |
total_clusters = media_ptr -> fx_media_total_clusters; |
519 |
|
|
|
520 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
521 |
|
|
if (replace_clusters > 0) |
522 |
|
|
{ |
523 |
|
|
|
524 |
|
|
/* Reset consecutive cluster. */ |
525 |
|
|
file_ptr -> fx_file_consecutive_cluster = 1; |
526 |
|
|
|
527 |
|
|
last_cluster = insertion_front; |
528 |
|
|
|
529 |
|
|
} |
530 |
|
|
else |
531 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
532 |
|
|
{ |
533 |
|
59280 |
last_cluster = file_ptr -> fx_file_last_physical_cluster; |
534 |
|
|
} |
535 |
|
|
|
536 |
|
59280 |
FAT_index = media_ptr -> fx_media_cluster_search_start; |
537 |
|
|
|
538 |
|
|
/* Loop to find the needed clusters. */ |
539 |
✓✓ |
122137 |
while (clusters) |
540 |
|
|
{ |
541 |
|
|
|
542 |
|
|
/* Decrease the cluster count. */ |
543 |
|
65756 |
clusters--; |
544 |
|
|
|
545 |
|
|
/* Loop to find the first available cluster. */ |
546 |
|
|
do |
547 |
|
|
{ |
548 |
|
|
|
549 |
|
|
/* Make sure we stop looking after one pass through the FAT table. */ |
550 |
✓✓ |
68736 |
if (!total_clusters) |
551 |
|
|
{ |
552 |
|
|
|
553 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
554 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
555 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
556 |
|
|
|
557 |
|
|
/* Release media protection. */ |
558 |
|
1 |
FX_UNPROTECT |
559 |
|
|
|
560 |
|
|
/* Something is wrong with the media - the desired clusters were |
561 |
|
|
not found in the FAT table. */ |
562 |
|
1 |
return(FX_NO_MORE_SPACE); |
563 |
|
|
} |
564 |
|
|
|
565 |
|
|
/* Read FAT entry. */ |
566 |
|
68735 |
status = _fx_utility_FAT_entry_read(media_ptr, FAT_index, &FAT_value); |
567 |
|
|
|
568 |
|
|
/* Check for a bad status. */ |
569 |
✓✓ |
68735 |
if (status != FX_SUCCESS) |
570 |
|
|
{ |
571 |
|
|
|
572 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
573 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
574 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
575 |
|
|
|
576 |
|
|
/* Release media protection. */ |
577 |
|
2897 |
FX_UNPROTECT |
578 |
|
|
|
579 |
|
|
/* Return the bad status. */ |
580 |
|
2897 |
return(status); |
581 |
|
|
} |
582 |
|
|
|
583 |
|
|
/* Decrement the total cluster count. */ |
584 |
|
65838 |
total_clusters--; |
585 |
|
|
|
586 |
|
|
/* Determine if the FAT entry is free. */ |
587 |
✓✓ |
65838 |
if (FAT_value == FX_FREE_CLUSTER) |
588 |
|
|
{ |
589 |
|
|
|
590 |
|
|
/* Move cluster search pointer forward. */ |
591 |
|
62858 |
media_ptr -> fx_media_cluster_search_start = FAT_index + 1; |
592 |
|
|
|
593 |
|
|
/* Determine if this needs to be wrapped. */ |
594 |
✓✓ |
62858 |
if (media_ptr -> fx_media_cluster_search_start >= (media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START)) |
595 |
|
|
{ |
596 |
|
|
|
597 |
|
|
/* Wrap the search to the beginning FAT entry. */ |
598 |
|
17 |
media_ptr -> fx_media_cluster_search_start = FX_FAT_ENTRY_START; |
599 |
|
|
} |
600 |
|
|
|
601 |
|
|
/* Break this loop. */ |
602 |
|
62858 |
break; |
603 |
|
|
} |
604 |
|
|
else |
605 |
|
|
{ |
606 |
|
|
|
607 |
|
|
/* FAT entry is not free... Advance the FAT index. */ |
608 |
|
2980 |
FAT_index++; |
609 |
|
|
|
610 |
|
|
/* Determine if we need to wrap the FAT index around. */ |
611 |
✓✓ |
2980 |
if (FAT_index >= (media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START)) |
612 |
|
|
{ |
613 |
|
|
|
614 |
|
|
/* Wrap the search to the beginning FAT entry. */ |
615 |
|
1 |
FAT_index = FX_FAT_ENTRY_START; |
616 |
|
|
} |
617 |
|
|
} |
618 |
|
|
} while (FX_TRUE); |
619 |
|
|
|
620 |
|
|
/* Determine if we have found the first new cluster yet. */ |
621 |
✓✓ |
62858 |
if (first_new_cluster == 0) |
622 |
|
|
{ |
623 |
|
|
|
624 |
|
|
/* Remember the first new cluster. */ |
625 |
|
56382 |
first_new_cluster = FAT_index; |
626 |
|
|
|
627 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
628 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
629 |
|
|
{ |
630 |
|
|
|
631 |
|
|
/* Set the undo log now. */ |
632 |
|
|
if (copy_head_cluster == 0) |
633 |
|
|
{ |
634 |
|
|
status = _fx_fault_tolerant_set_FAT_chain(media_ptr, FX_FALSE, file_ptr -> fx_file_current_physical_cluster, |
635 |
|
|
first_new_cluster, media_ptr -> fx_media_fat_last, media_ptr -> fx_media_fat_last); |
636 |
|
|
} |
637 |
|
|
else |
638 |
|
|
{ |
639 |
|
|
|
640 |
|
|
status = _fx_fault_tolerant_set_FAT_chain(media_ptr, FX_FALSE, insertion_front, first_new_cluster, |
641 |
|
|
copy_head_cluster, insertion_back); |
642 |
|
|
} |
643 |
|
|
|
644 |
|
|
/* Check for good completion status. */ |
645 |
|
|
if (status != FX_SUCCESS) |
646 |
|
|
{ |
647 |
|
|
|
648 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
649 |
|
|
|
650 |
|
|
/* Release media protection. */ |
651 |
|
|
FX_UNPROTECT |
652 |
|
|
|
653 |
|
|
/* Return the error status. */ |
654 |
|
|
return(status); |
655 |
|
|
} |
656 |
|
|
} |
657 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
658 |
|
|
} |
659 |
|
|
|
660 |
|
|
/* Make a quick check to see if an empty, cluster-less file |
661 |
|
|
is being written to for the first time. */ |
662 |
✓✓ |
62858 |
if (last_cluster) |
663 |
|
|
{ |
664 |
|
|
|
665 |
|
|
/* Check for the file's cluster. We won't perform this link until the |
666 |
|
|
entire FAT chain is built. */ |
667 |
✓✓ |
56680 |
if (last_cluster != file_ptr -> fx_file_last_physical_cluster) |
668 |
|
|
{ |
669 |
|
|
|
670 |
|
|
/* Normal condition - link the last cluster with the new |
671 |
|
|
found cluster. */ |
672 |
|
6476 |
status = _fx_utility_FAT_entry_write(media_ptr, last_cluster, FAT_index); |
673 |
|
|
} |
674 |
|
|
|
675 |
|
|
/* Check for a bad FAT write status. */ |
676 |
✓✓ |
56680 |
if (status != FX_SUCCESS) |
677 |
|
|
{ |
678 |
|
|
|
679 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
680 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
681 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
682 |
|
|
|
683 |
|
|
/* Release media protection. */ |
684 |
|
1 |
FX_UNPROTECT |
685 |
|
|
|
686 |
|
|
/* Return the bad status. */ |
687 |
|
1 |
return(status); |
688 |
|
|
} |
689 |
|
|
|
690 |
|
|
/* Determine if we are adding a sector after a write filled the previously |
691 |
|
|
allocated cluster exactly. */ |
692 |
|
56679 |
if ((file_ptr -> fx_file_current_relative_sector >= |
693 |
✓✓ |
56679 |
(media_ptr -> fx_media_sectors_per_cluster - 1)) && |
694 |
|
56586 |
(file_ptr -> fx_file_current_logical_offset >= |
695 |
✓✓ |
56586 |
media_ptr -> fx_media_bytes_per_sector)) |
696 |
|
|
{ |
697 |
|
|
|
698 |
|
|
/* Yes, we need to adjust all of the pertinent file parameters for |
699 |
|
|
writing into this newly allocated cluster. */ |
700 |
|
36865 |
file_ptr -> fx_file_current_physical_cluster = FAT_index; |
701 |
|
36865 |
file_ptr -> fx_file_current_relative_cluster++; |
702 |
|
36865 |
file_ptr -> fx_file_current_relative_sector = 0; |
703 |
|
36865 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
704 |
|
36865 |
(((ULONG64)(FAT_index - FX_FAT_ENTRY_START)) * |
705 |
|
36865 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
706 |
|
36865 |
file_ptr -> fx_file_current_logical_offset = 0; |
707 |
|
|
} |
708 |
|
|
} |
709 |
|
|
else |
710 |
|
|
{ |
711 |
|
|
|
712 |
|
|
/* This is the first cluster allocated for the file. Just |
713 |
|
|
remember it as being the first and setup the other file |
714 |
|
|
pointers accordingly. */ |
715 |
|
6178 |
file_ptr -> fx_file_first_physical_cluster = FAT_index; |
716 |
|
6178 |
file_ptr -> fx_file_current_physical_cluster = FAT_index; |
717 |
|
6178 |
file_ptr -> fx_file_current_relative_cluster = 0; |
718 |
|
6178 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
719 |
|
6178 |
(((ULONG64)(FAT_index - FX_FAT_ENTRY_START)) * |
720 |
|
6178 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
721 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
722 |
|
|
if (file_ptr -> fx_file_last_physical_cluster == 0) |
723 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
724 |
|
|
{ |
725 |
|
6178 |
file_ptr -> fx_file_current_logical_offset = 0; |
726 |
|
6178 |
file_ptr -> fx_file_current_file_offset = 0; |
727 |
|
|
} |
728 |
|
|
|
729 |
|
|
/* Also remember this as the first cluster in the directory |
730 |
|
|
entry. */ |
731 |
|
6178 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster = FAT_index; |
732 |
|
|
} |
733 |
|
|
|
734 |
|
|
/* Otherwise, remember the new FAT index as the last. */ |
735 |
|
62857 |
last_cluster = FAT_index; |
736 |
|
|
|
737 |
|
|
/* Move to the next FAT entry. */ |
738 |
|
62857 |
FAT_index = media_ptr -> fx_media_cluster_search_start; |
739 |
|
|
} |
740 |
|
|
|
741 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
742 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
743 |
|
|
{ |
744 |
|
|
|
745 |
|
|
/* Link the last cluster back to original FAT. */ |
746 |
|
|
status = _fx_utility_FAT_entry_write(media_ptr, last_cluster, insertion_back); |
747 |
|
|
} |
748 |
|
|
else |
749 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
750 |
|
|
{ |
751 |
|
|
|
752 |
|
|
/* Place an end-of-file marker on the last cluster. */ |
753 |
|
56381 |
status = _fx_utility_FAT_entry_write(media_ptr, last_cluster, media_ptr -> fx_media_fat_last); |
754 |
|
|
} |
755 |
|
|
|
756 |
|
|
/* Check for a bad FAT write status. */ |
757 |
✓✓ |
56381 |
if (status != FX_SUCCESS) |
758 |
|
|
{ |
759 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
760 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
761 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
762 |
|
|
|
763 |
|
|
/* Release media protection. */ |
764 |
|
1 |
FX_UNPROTECT |
765 |
|
|
|
766 |
|
|
/* Return the bad status. */ |
767 |
|
1 |
return(status); |
768 |
|
|
} |
769 |
|
|
|
770 |
|
|
|
771 |
|
|
/* Determine if the file already had clusters. */ |
772 |
✓✓ |
56380 |
if (file_ptr -> fx_file_last_physical_cluster) |
773 |
|
|
{ |
774 |
|
|
|
775 |
|
|
/* Now, link the file's old last cluster to the first cluster of the new chain. */ |
776 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
777 |
|
|
if (insertion_front) |
778 |
|
|
{ |
779 |
|
|
status = _fx_utility_FAT_entry_write(media_ptr, insertion_front, first_new_cluster); |
780 |
|
|
} |
781 |
|
|
else if ((media_ptr -> fx_media_fault_tolerant_enabled == FX_FALSE) || |
782 |
|
|
((replace_clusters == 0) && (first_new_cluster))) |
783 |
|
|
{ |
784 |
|
|
status = _fx_utility_FAT_entry_write(media_ptr, file_ptr -> fx_file_last_physical_cluster, first_new_cluster); |
785 |
|
|
} |
786 |
|
|
#else |
787 |
|
50204 |
status = _fx_utility_FAT_entry_write(media_ptr, file_ptr -> fx_file_last_physical_cluster, first_new_cluster); |
788 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
789 |
|
|
|
790 |
|
|
/* Check for a bad FAT write status. */ |
791 |
✓✓ |
50204 |
if (status != FX_SUCCESS) |
792 |
|
|
{ |
793 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
794 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
795 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
796 |
|
|
|
797 |
|
|
/* Release media protection. */ |
798 |
|
1 |
FX_UNPROTECT |
799 |
|
|
|
800 |
|
|
/* Return the bad status. */ |
801 |
|
1 |
return(status); |
802 |
|
|
} |
803 |
|
|
} |
804 |
|
|
|
805 |
|
|
#ifdef FX_FAULT_TOLERANT |
806 |
|
|
|
807 |
|
|
|
808 |
|
|
/* Ensure the new FAT chain is properly written to the media. */ |
809 |
|
|
|
810 |
|
|
/* Flush the cached individual FAT entries */ |
811 |
|
|
_fx_utility_FAT_flush(media_ptr); |
812 |
|
|
#endif |
813 |
|
|
|
814 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
815 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
816 |
|
|
{ |
817 |
|
|
|
818 |
|
|
/* Clear undo phase. */ |
819 |
|
|
media_ptr -> fx_media_fault_tolerant_state &= (UCHAR)(~FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN & 0xff); |
820 |
|
|
|
821 |
|
|
/* Update the last cluster? */ |
822 |
|
|
if (insertion_back == media_ptr -> fx_media_fat_last) |
823 |
|
|
{ |
824 |
|
|
|
825 |
|
|
/* Yes. Update the file control block with the last physical cluster. */ |
826 |
|
|
file_ptr -> fx_file_last_physical_cluster = last_cluster; |
827 |
|
|
} |
828 |
|
|
} |
829 |
|
|
else |
830 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
831 |
|
|
{ |
832 |
|
|
|
833 |
|
|
/* Update the file control block with the last physical cluster. */ |
834 |
|
56379 |
file_ptr -> fx_file_last_physical_cluster = last_cluster; |
835 |
|
|
} |
836 |
|
|
} |
837 |
|
|
|
838 |
|
|
/* Check for a need to increment to the next sector within a previously |
839 |
|
|
allocated cluster. */ |
840 |
|
596858 |
if (file_ptr -> fx_file_current_logical_offset >= |
841 |
✓✓ |
596858 |
media_ptr -> fx_media_bytes_per_sector) |
842 |
|
|
{ |
843 |
|
|
|
844 |
|
|
/* Update the sector specific file parameters to start at the |
845 |
|
|
next logical sector. */ |
846 |
|
4675 |
file_ptr -> fx_file_current_logical_sector++; |
847 |
|
4675 |
file_ptr -> fx_file_current_relative_sector++; |
848 |
|
4675 |
file_ptr -> fx_file_current_logical_offset = 0; |
849 |
|
|
} |
850 |
|
|
|
851 |
|
|
/* At this point there is enough room to perform the file write operation. */ |
852 |
|
|
|
853 |
|
|
/* Setup local buffer pointer. */ |
854 |
|
596858 |
source_ptr = (UCHAR *)buffer_ptr; |
855 |
|
|
|
856 |
|
|
/* Setup the remaining number of bytes to write. */ |
857 |
|
596858 |
bytes_remaining = size; |
858 |
|
|
|
859 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
860 |
|
|
if (replace_clusters > 0) |
861 |
|
|
{ |
862 |
|
|
|
863 |
|
|
/* Force update current cluster and sector. */ |
864 |
|
|
file_ptr -> fx_file_current_physical_cluster = first_new_cluster; |
865 |
|
|
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
866 |
|
|
(((ULONG64)(first_new_cluster - FX_FAT_ENTRY_START)) * |
867 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + |
868 |
|
|
file_ptr -> fx_file_current_relative_sector; |
869 |
|
|
|
870 |
|
|
/* Copy sectors in replaced cluster but not overwritten at the front. */ |
871 |
|
|
for (i = 0; i < file_ptr -> fx_file_current_relative_sector; i++) |
872 |
|
|
{ |
873 |
|
|
status = _fx_utility_logical_sector_read(media_ptr, |
874 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
875 |
|
|
(((ULONG)(copy_head_cluster - FX_FAT_ENTRY_START)) * |
876 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + i, |
877 |
|
|
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
878 |
|
|
|
879 |
|
|
/* Check for good completion status. */ |
880 |
|
|
if (status != FX_SUCCESS) |
881 |
|
|
{ |
882 |
|
|
|
883 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
884 |
|
|
|
885 |
|
|
/* Release media protection. */ |
886 |
|
|
FX_UNPROTECT |
887 |
|
|
|
888 |
|
|
/* Return the error status. */ |
889 |
|
|
return(status); |
890 |
|
|
} |
891 |
|
|
|
892 |
|
|
/* Write back the current logical sector. */ |
893 |
|
|
status = _fx_utility_logical_sector_write(media_ptr, |
894 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
895 |
|
|
(((ULONG)(file_ptr -> fx_file_current_physical_cluster - FX_FAT_ENTRY_START)) * |
896 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + i, |
897 |
|
|
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
898 |
|
|
|
899 |
|
|
/* Check for good completion status. */ |
900 |
|
|
if (status != FX_SUCCESS) |
901 |
|
|
{ |
902 |
|
|
|
903 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
904 |
|
|
|
905 |
|
|
/* Release media protection. */ |
906 |
|
|
FX_UNPROTECT |
907 |
|
|
|
908 |
|
|
/* Return the error status. */ |
909 |
|
|
return(status); |
910 |
|
|
} |
911 |
|
|
} |
912 |
|
|
} |
913 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
914 |
|
|
|
915 |
|
|
/* Loop to write all of the bytes. */ |
916 |
✓✓ |
1152964 |
while (bytes_remaining) |
917 |
|
|
{ |
918 |
|
|
|
919 |
|
|
/* Determine if a beginning or ending partial write is required. */ |
920 |
✓✓ |
615983 |
if ((file_ptr -> fx_file_current_logical_offset) || |
921 |
✓✓ |
88327 |
(bytes_remaining < media_ptr -> fx_media_bytes_per_sector)) |
922 |
|
|
{ |
923 |
|
|
|
924 |
|
|
/* A partial sector write is required. */ |
925 |
|
|
|
926 |
|
|
/* Read the current logical sector. */ |
927 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
928 |
|
|
if (replace_clusters > 0) |
929 |
|
|
{ |
930 |
|
|
if (file_ptr -> fx_file_current_physical_cluster == first_new_cluster) |
931 |
|
|
{ |
932 |
|
|
|
933 |
|
|
/* It's at beginning. */ |
934 |
|
|
status = _fx_utility_logical_sector_read(media_ptr, |
935 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
936 |
|
|
(((ULONG)(copy_head_cluster - FX_FAT_ENTRY_START)) * |
937 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + |
938 |
|
|
file_ptr -> fx_file_current_relative_sector, |
939 |
|
|
media_ptr -> fx_media_memory_buffer, (ULONG)1, FX_DATA_SECTOR); |
940 |
|
|
} |
941 |
|
|
else if (data_append == FX_FALSE) |
942 |
|
|
{ |
943 |
|
|
|
944 |
|
|
/* It's at ending. */ |
945 |
|
|
status = _fx_utility_logical_sector_read(media_ptr, |
946 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
947 |
|
|
(((ULONG)(copy_tail_cluster - FX_FAT_ENTRY_START)) * |
948 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + |
949 |
|
|
file_ptr -> fx_file_current_relative_sector, |
950 |
|
|
media_ptr -> fx_media_memory_buffer, (ULONG)1, FX_DATA_SECTOR); |
951 |
|
|
} |
952 |
|
|
else |
953 |
|
|
{ |
954 |
|
|
|
955 |
|
|
/* It's at ending. */ |
956 |
|
|
status = _fx_utility_logical_sector_read(media_ptr, |
957 |
|
|
file_ptr -> fx_file_current_logical_sector, |
958 |
|
|
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
959 |
|
|
} |
960 |
|
|
} |
961 |
|
|
else |
962 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
963 |
|
|
{ |
964 |
|
582290 |
status = _fx_utility_logical_sector_read(media_ptr, |
965 |
|
|
file_ptr -> fx_file_current_logical_sector, |
966 |
|
582290 |
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
967 |
|
|
} |
968 |
|
|
|
969 |
|
|
/* Check for good completion status. */ |
970 |
✓✓ |
582290 |
if (status != FX_SUCCESS) |
971 |
|
|
{ |
972 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
973 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
974 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
975 |
|
|
|
976 |
|
|
/* Release media protection. */ |
977 |
|
13365 |
FX_UNPROTECT |
978 |
|
|
|
979 |
|
|
/* Return the error status. */ |
980 |
|
13365 |
return(status); |
981 |
|
|
} |
982 |
|
|
|
983 |
|
|
/* Copy the appropriate number of bytes into the destination buffer. */ |
984 |
|
568925 |
copy_bytes = media_ptr -> fx_media_bytes_per_sector - |
985 |
|
568925 |
file_ptr -> fx_file_current_logical_offset; |
986 |
|
|
|
987 |
|
|
/* Check to see if only a portion of the sector needs to be |
988 |
|
|
copied. */ |
989 |
✓✓ |
568925 |
if (copy_bytes > bytes_remaining) |
990 |
|
|
{ |
991 |
|
|
|
992 |
|
|
/* Adjust the number of bytes to copy. */ |
993 |
|
524833 |
copy_bytes = (ULONG)bytes_remaining; |
994 |
|
|
} |
995 |
|
|
|
996 |
|
|
/* Actually perform the memory copy. */ |
997 |
|
568925 |
_fx_utility_memory_copy(source_ptr, ((UCHAR *)media_ptr -> fx_media_memory_buffer) + /* Use case of memcpy is verified. */ |
998 |
|
568925 |
file_ptr -> fx_file_current_logical_offset, |
999 |
|
|
copy_bytes); |
1000 |
|
|
|
1001 |
|
|
/* Write back the current logical sector. */ |
1002 |
|
568925 |
status = _fx_utility_logical_sector_write(media_ptr, file_ptr -> fx_file_current_logical_sector, |
1003 |
|
568925 |
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
1004 |
|
|
|
1005 |
|
|
/* Check for good completion status. */ |
1006 |
✓✓ |
568925 |
if (status != FX_SUCCESS) |
1007 |
|
|
{ |
1008 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1009 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1010 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1011 |
|
|
|
1012 |
|
|
/* Release media protection. */ |
1013 |
|
4153 |
FX_UNPROTECT |
1014 |
|
|
|
1015 |
|
|
/* Return the error status. */ |
1016 |
|
4153 |
return(status); |
1017 |
|
|
} |
1018 |
|
|
|
1019 |
|
|
|
1020 |
|
|
/* Increment the logical sector byte offset. */ |
1021 |
|
564772 |
file_ptr -> fx_file_current_logical_offset = |
1022 |
|
564772 |
file_ptr -> fx_file_current_logical_offset + copy_bytes; |
1023 |
|
|
|
1024 |
|
|
/* Adjust the remaining bytes to read. */ |
1025 |
|
564772 |
bytes_remaining = bytes_remaining - copy_bytes; |
1026 |
|
|
|
1027 |
|
|
/* Adjust the pointer to the source buffer. */ |
1028 |
|
564772 |
source_ptr = source_ptr + copy_bytes; |
1029 |
|
|
} |
1030 |
|
|
else |
1031 |
|
|
{ |
1032 |
|
|
|
1033 |
|
|
/* Attempt to write multiple sectors directly to the media. */ |
1034 |
|
|
|
1035 |
|
|
/* Calculate the number of whole sectors to write. */ |
1036 |
|
33693 |
sectors = (UINT)(bytes_remaining / media_ptr -> fx_media_bytes_per_sector); |
1037 |
|
|
|
1038 |
|
33693 |
next_cluster = cluster = file_ptr -> fx_file_current_physical_cluster; |
1039 |
|
|
|
1040 |
|
33693 |
for (i = (media_ptr -> fx_media_sectors_per_cluster - |
1041 |
✓✓ |
34204 |
file_ptr -> fx_file_current_relative_sector); i < sectors; i += media_ptr -> fx_media_sectors_per_cluster) |
1042 |
|
|
{ |
1043 |
|
848 |
status = _fx_utility_FAT_entry_read(media_ptr, cluster, &next_cluster); |
1044 |
|
|
|
1045 |
|
|
/* Determine if an error is present. */ |
1046 |
✓✓✓✓
|
848 |
if ((status != FX_SUCCESS) || (next_cluster < FX_FAT_ENTRY_START) || |
1047 |
✓✓ |
673 |
(next_cluster > media_ptr -> fx_media_fat_reserved)) |
1048 |
|
|
{ |
1049 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1050 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1051 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1052 |
|
|
|
1053 |
|
|
/* Release media protection. */ |
1054 |
|
335 |
FX_UNPROTECT |
1055 |
|
|
|
1056 |
|
|
/* Send error message back to caller. */ |
1057 |
✓✓ |
335 |
if (status != FX_SUCCESS) |
1058 |
|
|
{ |
1059 |
|
174 |
return(status); |
1060 |
|
|
} |
1061 |
|
|
else |
1062 |
|
|
{ |
1063 |
|
161 |
return(FX_FILE_CORRUPT); |
1064 |
|
|
} |
1065 |
|
|
} |
1066 |
|
|
|
1067 |
✓✓ |
513 |
if (next_cluster != cluster + 1) |
1068 |
|
|
{ |
1069 |
|
2 |
break; |
1070 |
|
|
} |
1071 |
|
|
else |
1072 |
|
|
{ |
1073 |
|
511 |
cluster = next_cluster; |
1074 |
|
|
} |
1075 |
|
|
} |
1076 |
|
|
|
1077 |
✓✓ |
33358 |
if (i < sectors) |
1078 |
|
|
{ |
1079 |
|
2 |
sectors = i; |
1080 |
|
|
} |
1081 |
|
|
|
1082 |
|
|
/* Perform the data write directly from the user's buffer of |
1083 |
|
|
the appropriate number of sectors. */ |
1084 |
|
33358 |
status = _fx_utility_logical_sector_write(media_ptr, file_ptr -> fx_file_current_logical_sector, |
1085 |
|
|
source_ptr, (ULONG) sectors, FX_DATA_SECTOR); |
1086 |
|
|
|
1087 |
|
|
/* Check for good completion status. */ |
1088 |
✓✓ |
33358 |
if (status != FX_SUCCESS) |
1089 |
|
|
{ |
1090 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1091 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1092 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1093 |
|
|
|
1094 |
|
|
/* Release media protection. */ |
1095 |
|
435 |
FX_UNPROTECT |
1096 |
|
|
|
1097 |
|
|
/* Return the error status. */ |
1098 |
|
435 |
return(status); |
1099 |
|
|
} |
1100 |
|
|
|
1101 |
|
|
/* Now adjust the various file pointers. */ |
1102 |
|
|
|
1103 |
|
|
/* Increment the current logical sector. Subtract one from |
1104 |
|
|
the sector count because we are going to use the logical |
1105 |
|
|
offset to do additional sector/cluster arithmetic below. */ |
1106 |
|
32923 |
file_ptr -> fx_file_current_logical_sector = |
1107 |
|
32923 |
file_ptr -> fx_file_current_logical_sector + |
1108 |
|
32923 |
(sectors - 1); |
1109 |
|
|
|
1110 |
|
|
/* Move the relative cluster and sector as well. */ |
1111 |
|
32923 |
file_ptr -> fx_file_current_relative_cluster = file_ptr -> fx_file_current_relative_cluster + |
1112 |
|
32923 |
(file_ptr -> fx_file_current_relative_sector + (sectors - 1)) / |
1113 |
|
32923 |
media_ptr -> fx_media_sectors_per_cluster; |
1114 |
|
|
|
1115 |
|
32923 |
file_ptr -> fx_file_current_relative_sector = |
1116 |
|
32923 |
(file_ptr -> fx_file_current_relative_sector + (sectors - 1)) % |
1117 |
|
32923 |
media_ptr -> fx_media_sectors_per_cluster; |
1118 |
|
|
|
1119 |
|
|
/* Increment the logical sector byte offset. */ |
1120 |
|
32923 |
file_ptr -> fx_file_current_logical_offset = |
1121 |
|
32923 |
media_ptr -> fx_media_bytes_per_sector; |
1122 |
|
|
|
1123 |
|
32923 |
file_ptr -> fx_file_current_physical_cluster = cluster; |
1124 |
|
|
|
1125 |
|
|
/* Adjust the remaining bytes. */ |
1126 |
|
32923 |
bytes_remaining = bytes_remaining - |
1127 |
|
32923 |
(((ULONG)media_ptr -> fx_media_bytes_per_sector) * sectors); |
1128 |
|
|
|
1129 |
|
|
/* Adjust the pointer to the source buffer. */ |
1130 |
|
32923 |
source_ptr = source_ptr + |
1131 |
|
32923 |
(((ULONG)media_ptr -> fx_media_bytes_per_sector) * sectors); |
1132 |
|
|
} |
1133 |
|
|
|
1134 |
|
|
/* At this point, we have either written a partial sector or have successfully |
1135 |
|
|
written one or more whole sectors. Determine if we are at the end of |
1136 |
|
|
the current logical sector. */ |
1137 |
|
597695 |
if (file_ptr -> fx_file_current_logical_offset >= |
1138 |
✓✓ |
597695 |
media_ptr -> fx_media_bytes_per_sector) |
1139 |
|
|
{ |
1140 |
|
|
|
1141 |
|
|
/* Determine if we are at the exact physical end of the file. */ |
1142 |
✓✓ |
76022 |
if ((bytes_remaining == 0) && |
1143 |
|
55700 |
((file_ptr -> fx_file_current_file_offset + size) >= |
1144 |
✓✓ |
55700 |
file_ptr -> fx_file_current_available_size)) |
1145 |
|
|
{ |
1146 |
|
|
|
1147 |
|
|
/* Skip the following file parameter adjustments. The next write will |
1148 |
|
|
detect the logical offset out of the range of the sector and reset |
1149 |
|
|
all of the pertinent information. */ |
1150 |
|
37229 |
break; |
1151 |
|
|
} |
1152 |
|
|
|
1153 |
|
|
/* We need to move to the next logical sector, but first |
1154 |
|
|
determine if the next logical sector is within the same |
1155 |
|
|
cluster. */ |
1156 |
|
|
|
1157 |
|
|
/* Increment the current relative sector in the cluster. */ |
1158 |
|
38793 |
file_ptr -> fx_file_current_relative_sector++; |
1159 |
|
|
|
1160 |
|
|
/* Determine if this is in a new cluster. */ |
1161 |
|
38793 |
if (file_ptr -> fx_file_current_relative_sector >= |
1162 |
✓✓ |
38793 |
media_ptr -> fx_media_sectors_per_cluster) |
1163 |
|
|
{ |
1164 |
|
|
|
1165 |
|
|
/* Yes, we need to move to the next cluster. */ |
1166 |
|
|
|
1167 |
|
|
/* Read the FAT entry of the current cluster to find |
1168 |
|
|
the next cluster. */ |
1169 |
|
24692 |
status = _fx_utility_FAT_entry_read(media_ptr, |
1170 |
|
|
file_ptr -> fx_file_current_physical_cluster, &next_cluster); |
1171 |
|
|
|
1172 |
|
|
/* Determine if an error is present. */ |
1173 |
✓✓✓✓
|
24692 |
if ((status != FX_SUCCESS) || (next_cluster < FX_FAT_ENTRY_START) || |
1174 |
✓✓ |
23907 |
(next_cluster > media_ptr -> fx_media_fat_reserved)) |
1175 |
|
|
{ |
1176 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1177 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1178 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1179 |
|
|
|
1180 |
|
|
/* Release media protection. */ |
1181 |
|
4360 |
FX_UNPROTECT |
1182 |
|
|
|
1183 |
|
|
/* Send error message back to caller. */ |
1184 |
✓✓ |
4360 |
if (status != FX_SUCCESS) |
1185 |
|
|
{ |
1186 |
|
784 |
return(status); |
1187 |
|
|
} |
1188 |
|
|
else |
1189 |
|
|
{ |
1190 |
|
3576 |
return(FX_FILE_CORRUPT); |
1191 |
|
|
} |
1192 |
|
|
} |
1193 |
|
|
|
1194 |
|
|
/* Otherwise, we have a new cluster. Save it in the file |
1195 |
|
|
control block and calculate a new logical sector value. */ |
1196 |
|
20332 |
file_ptr -> fx_file_current_physical_cluster = next_cluster; |
1197 |
|
20332 |
file_ptr -> fx_file_current_relative_cluster++; |
1198 |
|
20332 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
1199 |
|
20332 |
((((ULONG64)next_cluster) - FX_FAT_ENTRY_START) * |
1200 |
|
20332 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
1201 |
|
20332 |
file_ptr -> fx_file_current_relative_sector = 0; |
1202 |
|
|
} |
1203 |
|
|
else |
1204 |
|
|
{ |
1205 |
|
|
|
1206 |
|
|
/* Still within the same cluster so just increment the |
1207 |
|
|
logical sector. */ |
1208 |
|
14101 |
file_ptr -> fx_file_current_logical_sector++; |
1209 |
|
|
} |
1210 |
|
|
|
1211 |
|
|
/* In either case, we are now positioned at a new sector so |
1212 |
|
|
clear the logical sector offset. */ |
1213 |
|
34433 |
file_ptr -> fx_file_current_logical_offset = 0; |
1214 |
|
|
} |
1215 |
|
|
} |
1216 |
|
|
|
1217 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1218 |
|
|
if (((replace_clusters > 0) && (data_append == FX_FALSE)) && |
1219 |
|
|
(file_ptr -> fx_file_current_logical_offset || file_ptr -> fx_file_current_relative_sector)) |
1220 |
|
|
{ |
1221 |
|
|
|
1222 |
|
|
/* Copy sectors in replaced cluster but not overwritten at the end. */ |
1223 |
|
|
if (file_ptr -> fx_file_current_logical_offset == 0) |
1224 |
|
|
{ |
1225 |
|
|
i = file_ptr -> fx_file_current_relative_sector; |
1226 |
|
|
} |
1227 |
|
|
else |
1228 |
|
|
{ |
1229 |
|
|
i = file_ptr -> fx_file_current_relative_sector + 1; |
1230 |
|
|
} |
1231 |
|
|
for (; i < media_ptr -> fx_media_sectors_per_cluster; i++) |
1232 |
|
|
{ |
1233 |
|
|
status = _fx_utility_logical_sector_read(media_ptr, |
1234 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
1235 |
|
|
(((ULONG)(copy_tail_cluster - FX_FAT_ENTRY_START)) * |
1236 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + i, |
1237 |
|
|
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
1238 |
|
|
|
1239 |
|
|
/* Check for good completion status. */ |
1240 |
|
|
if (status != FX_SUCCESS) |
1241 |
|
|
{ |
1242 |
|
|
|
1243 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1244 |
|
|
|
1245 |
|
|
/* Release media protection. */ |
1246 |
|
|
FX_UNPROTECT |
1247 |
|
|
|
1248 |
|
|
/* Return the error status. */ |
1249 |
|
|
return(status); |
1250 |
|
|
} |
1251 |
|
|
|
1252 |
|
|
/* Write back the current logical sector. */ |
1253 |
|
|
status = _fx_utility_logical_sector_write(media_ptr, |
1254 |
|
|
((ULONG)media_ptr -> fx_media_data_sector_start) + |
1255 |
|
|
(((ULONG)(file_ptr -> fx_file_current_physical_cluster - FX_FAT_ENTRY_START)) * |
1256 |
|
|
((ULONG)media_ptr -> fx_media_sectors_per_cluster)) + i, |
1257 |
|
|
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
1258 |
|
|
|
1259 |
|
|
/* Check for good completion status. */ |
1260 |
|
|
if (status != FX_SUCCESS) |
1261 |
|
|
{ |
1262 |
|
|
|
1263 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1264 |
|
|
|
1265 |
|
|
/* Release media protection. */ |
1266 |
|
|
FX_UNPROTECT |
1267 |
|
|
|
1268 |
|
|
/* Return the error status. */ |
1269 |
|
|
return(status); |
1270 |
|
|
} |
1271 |
|
|
} |
1272 |
|
|
} |
1273 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1274 |
|
|
|
1275 |
|
|
/* Adjust the current file offset accordingly. */ |
1276 |
|
574210 |
file_ptr -> fx_file_current_file_offset = |
1277 |
|
574210 |
file_ptr -> fx_file_current_file_offset + size; |
1278 |
|
|
|
1279 |
|
|
/* Copy the new file size into the directory entry. */ |
1280 |
|
574210 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = |
1281 |
|
574210 |
file_ptr -> fx_file_current_file_size; |
1282 |
|
|
|
1283 |
|
|
/* Determine if this write was done past the previous file size. */ |
1284 |
|
574210 |
if (file_ptr -> fx_file_current_file_offset > |
1285 |
✓✓ |
574210 |
file_ptr -> fx_file_current_file_size) |
1286 |
|
|
{ |
1287 |
|
|
|
1288 |
|
|
/* Yes, we have written past the previous end of the file. Update |
1289 |
|
|
the file size. */ |
1290 |
|
574153 |
file_ptr -> fx_file_current_file_size = file_ptr -> fx_file_current_file_offset; |
1291 |
|
|
|
1292 |
|
|
#ifndef FX_DONT_UPDATE_OPEN_FILES |
1293 |
|
|
|
1294 |
|
|
/* Search the opened files list to see if the same file is opened for reading. */ |
1295 |
|
574153 |
open_count = media_ptr -> fx_media_opened_file_count; |
1296 |
|
574153 |
search_ptr = media_ptr -> fx_media_opened_file_list; |
1297 |
✓✓ |
1460301 |
while (open_count) |
1298 |
|
|
{ |
1299 |
|
|
|
1300 |
|
|
/* Is this file the same file opened for reading? */ |
1301 |
✓✓ |
886148 |
if ((search_ptr != file_ptr) && |
1302 |
|
311995 |
(search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector == |
1303 |
✓✓ |
311995 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector) && |
1304 |
|
301891 |
(search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset == |
1305 |
✓✓ |
301891 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset)) |
1306 |
|
|
{ |
1307 |
|
|
|
1308 |
|
|
/* Yes, the same file is opened for reading. */ |
1309 |
|
|
|
1310 |
|
|
/* Setup the new size. */ |
1311 |
|
72878 |
search_ptr -> fx_file_current_file_size = file_ptr -> fx_file_current_file_offset; |
1312 |
|
|
|
1313 |
|
|
/* Setup the new directory entry. */ |
1314 |
|
72878 |
search_ptr -> fx_file_dir_entry.fx_dir_entry_cluster = file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster; |
1315 |
|
72878 |
search_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size; |
1316 |
|
72878 |
search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector = file_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector; |
1317 |
|
72878 |
search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset = file_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset; |
1318 |
|
|
|
1319 |
|
|
/* Setup the last cluster. This really isn't used during reading, but it is nice to keep things |
1320 |
|
|
consistent. */ |
1321 |
|
72878 |
search_ptr -> fx_file_last_physical_cluster = file_ptr -> fx_file_last_physical_cluster; |
1322 |
|
|
|
1323 |
|
|
/* Update the available clusters as well. */ |
1324 |
|
72878 |
search_ptr -> fx_file_current_available_size = file_ptr -> fx_file_current_available_size; |
1325 |
|
|
|
1326 |
|
|
/* Determine if an empty file was previously opened. */ |
1327 |
✓✓ |
72878 |
if (search_ptr -> fx_file_total_clusters == 0) |
1328 |
|
|
{ |
1329 |
|
|
|
1330 |
|
|
/* Setup initial parameters. */ |
1331 |
|
10 |
search_ptr -> fx_file_total_clusters = file_ptr -> fx_file_total_clusters; |
1332 |
|
10 |
search_ptr -> fx_file_current_physical_cluster = file_ptr -> fx_file_first_physical_cluster; |
1333 |
|
10 |
search_ptr -> fx_file_current_relative_cluster = 0; |
1334 |
|
10 |
search_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
1335 |
|
10 |
(((ULONG64)(file_ptr -> fx_file_first_physical_cluster - FX_FAT_ENTRY_START)) * |
1336 |
|
10 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
1337 |
|
10 |
search_ptr -> fx_file_current_relative_sector = 0; |
1338 |
|
10 |
search_ptr -> fx_file_current_logical_offset = 0; |
1339 |
|
10 |
search_ptr -> fx_file_current_file_offset = 0; |
1340 |
|
|
} |
1341 |
|
|
} |
1342 |
|
|
|
1343 |
|
|
/* Adjust the pointer and decrement the search count. */ |
1344 |
|
886148 |
search_ptr = search_ptr -> fx_file_opened_next; |
1345 |
|
886148 |
open_count--; |
1346 |
|
|
} |
1347 |
|
|
#endif |
1348 |
|
|
} |
1349 |
|
|
|
1350 |
|
|
/* Finally, mark this file as modified. */ |
1351 |
|
574210 |
file_ptr -> fx_file_modified = FX_TRUE; |
1352 |
|
|
|
1353 |
|
|
#ifdef FX_FAULT_TOLERANT_DATA |
1354 |
|
|
|
1355 |
|
|
/* Ensure that all file data is flushed out. */ |
1356 |
|
|
|
1357 |
|
|
/* Flush the internal logical sector cache. */ |
1358 |
|
|
_fx_utility_logical_sector_flush(media_ptr, 1, media_ptr -> fx_media_total_sectors, FX_FALSE); |
1359 |
|
|
|
1360 |
|
|
/* Lockout interrupts for time/date access. */ |
1361 |
|
|
FX_DISABLE_INTS |
1362 |
|
|
|
1363 |
|
|
/* Set the new time and date. */ |
1364 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_time = _fx_system_time; |
1365 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_date = _fx_system_date; |
1366 |
|
|
|
1367 |
|
|
/* Restore interrupts. */ |
1368 |
|
|
FX_RESTORE_INTS |
1369 |
|
|
|
1370 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1371 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
1372 |
|
|
{ |
1373 |
|
|
|
1374 |
|
|
/* Copy the new file size into the directory entry. */ |
1375 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = file_ptr -> fx_file_current_file_size; |
1376 |
|
|
} |
1377 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1378 |
|
|
|
1379 |
|
|
/* Write the directory entry to the media. */ |
1380 |
|
|
status = _fx_directory_entry_write(media_ptr, &(file_ptr -> fx_file_dir_entry)); |
1381 |
|
|
|
1382 |
|
|
/* Check for a good status. */ |
1383 |
|
|
if (status != FX_SUCCESS) |
1384 |
|
|
{ |
1385 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1386 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
1387 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1388 |
|
|
|
1389 |
|
|
/* Release media protection. */ |
1390 |
|
|
FX_UNPROTECT |
1391 |
|
|
|
1392 |
|
|
/* Error writing the directory. */ |
1393 |
|
|
return(status); |
1394 |
|
|
} |
1395 |
|
|
#endif |
1396 |
|
|
|
1397 |
|
|
/* Update the trace event with the bytes written. */ |
1398 |
|
|
FX_TRACE_EVENT_UPDATE(trace_event, trace_timestamp, FX_TRACE_FILE_WRITE, 0, 0, 0, size) |
1399 |
|
|
|
1400 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
1401 |
|
|
/* End transaction. */ |
1402 |
|
|
status = _fx_fault_tolerant_transaction_end(media_ptr); |
1403 |
|
|
|
1404 |
|
|
/* Check for a bad status. */ |
1405 |
|
|
if (status != FX_SUCCESS) |
1406 |
|
|
{ |
1407 |
|
|
|
1408 |
|
|
/* Release media protection. */ |
1409 |
|
|
FX_UNPROTECT |
1410 |
|
|
|
1411 |
|
|
/* Return the bad status. */ |
1412 |
|
|
return(status); |
1413 |
|
|
} |
1414 |
|
|
|
1415 |
|
|
/* Update maximum size used if necessary. */ |
1416 |
|
|
if (file_ptr -> fx_file_current_file_offset > file_ptr -> fx_file_maximum_size_used) |
1417 |
|
|
{ |
1418 |
|
|
file_ptr -> fx_file_maximum_size_used = file_ptr -> fx_file_current_file_offset; |
1419 |
|
|
} |
1420 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
1421 |
|
|
|
1422 |
|
|
/* Invoke file write callback. */ |
1423 |
✓✓ |
574210 |
if (file_ptr -> fx_file_write_notify) |
1424 |
|
|
{ |
1425 |
|
1 |
file_ptr -> fx_file_write_notify(file_ptr); |
1426 |
|
|
} |
1427 |
|
|
|
1428 |
|
|
/* Release media protection. */ |
1429 |
|
574210 |
FX_UNPROTECT |
1430 |
|
|
|
1431 |
|
|
/* Return a successful status to the caller. */ |
1432 |
|
574210 |
return(FX_SUCCESS); |
1433 |
|
|
} |
1434 |
|
|
|