apfs_fat32_write.c

一个可以在开发板上运行的fat文件系统,是在windows平台下开发的,是学习文件系统的好帮手

//-----------------------------------------------------------------------------
// This file is part of AP.FS
// AP.FS is a FAT32 file system face to the embedded system,It's target is to
// support the portable storage device such as SD Card,TF Card or USB Disc 's
// file system.
// please login www.another-prj.com to get more details.
//																caiyuqing
//																2008-1-8
//-----------------------------------------------------------------------------
#include "apfs_fat32_write.h"

BOOL apfs_fat32_add_file_entry(UINT32 dir_cluster,const char *file_name,
							const char *short_file_name,
							UINT32 start_cluster, UINT32 size)
{

}
//-----------------------------------------------------------------------------
// apfs_fat32_add_free_space_to_chain: Allocate another cluster of free space 
// to the end of a files cluster chain.
//-----------------------------------------------------------------------------
BOOL apfs_fat32_add_free_space_to_chain(UINT32 *start_cluster)
{
	UINT32 next_cluster;

	// Set the next free cluster hint to unknown
	apfs_fat32_set_fsInfo_next_cluster(0xFFFFFFFF); 

	// Start looking for free clusters from the beginning
	if(apfs_fat32_find_blank_cluster(2, &next_cluster))
	{
		// Point last to this
	//	FAT32_SetClusterValue(*start_cluster, next_cluster);
		
		// Point this to end of file
	//	FAT32_SetClusterValue(next_cluster, FAT32_EOC_FLAG);

		// Adjust argument reference
		*start_cluster = next_cluster;

		return TRUE;
	}
	else
		return FALSE;
}

BOOL apfs_fat32_allocate_free_space(BOOL new_file, UINT32 *start_cluster, UINT32 size)
{

}
BOOL apfs_fat32_find_free_offset(UINT32 dir_cluster, int entry_count, 
								 UINT32 *psector, BYTE *poffset)
{
}