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//fat_misc.c
//v1.0
#include "fat_misc.h"
#include "fs_api.h"
static unsigned int _usedSecNums;
static int strFindFromEnd( char *str,char strValue )
{
int pos = 0,i = 0,strNum = 0;
while(1)
{
if( (*str)!=0 )
{
strNum++;
str++;
}
else
{
break;
}
}
pos = strNum;
for( i=0;i<strNum;i++ )
{
str--;
pos--;
if( (*str) == strValue||(*str) == ':' )
{
return pos;
}
if( (*str)== 0 )
{
return -1;
}
}
return -1;
}
int getDirSize( const char * path, int includeSubdirs, unsigned int * dirSize )
{
char dirPath[MAX_FILENAME_LENGTH];
unsigned int size = 0;
if( "" == path ){
return false;
}
memset( dirPath,0,MAX_FILENAME_LENGTH );
strcpy( dirPath,path );
if( dirPath[strlen(dirPath)-1] != '/' )
dirPath[strlen(dirPath)] = '/';
if( strlen(dirPath) > MAX_FILENAME_LENGTH )
return false;
DIR_STATE_STRUCT *dir;
dir = fat_opendir((const char*)dirPath);
if (dir == NULL)
return false;
struct stat stat_buf;
DIR_ENTRY *currentEntry;
char* filename;
while(fat_readdir_ex(dir, &stat_buf) != NULL)
{
filename = currentEntry->d_name;
if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
continue;
if (!(stat_buf.st_mode & S_IFDIR)) {
size += (stat_buf.st_size+511)/512;
_usedSecNums +=(stat_buf.st_size+511)/512;
}
else if (includeSubdirs)
{
// calculate the size recursively
unsigned int subDirSize = 0;
char dirPathBuffer[MAX_FILENAME_LENGTH];
memset( dirPathBuffer,0,MAX_FILENAME_LENGTH );
strcpy( dirPathBuffer,dirPath );
memset( dirPath,0,MAX_FILENAME_LENGTH );
sprintf( dirPath,"%s%s",dirPathBuffer,filename );
int succ = getDirSize( dirPath, includeSubdirs, &subDirSize );
if( succ ) {
size += (subDirSize+511)/512;
_usedSecNums +=(subDirSize+511)/512;
}
memset( dirPath,0,MAX_FILENAME_LENGTH );
strcpy( dirPath,dirPathBuffer );
}
}
fat_closedir(dir);
*dirSize = size;
return true;
}
int fat_getDiskTotalSpace( char * diskName, unsigned int * diskSpace )
{
if( !strcmp("",diskName) )
return false;
unsigned int len = strlen(diskName);
if( *(diskName+len-1) != '/' ){
*(diskName+len) = '/';
}
PARTITION * diskPartition = _FAT_partition_getPartitionFromPath( diskName );
if( NULL == diskPartition )
return false;
*diskSpace = (unsigned int)diskPartition->numberOfSectors;
return true;
}
int fat_getDiskSpaceInfo( char * diskName, unsigned int * total, unsigned int * used, unsigned int * freeSpace )
{
_usedSecNums = 0;
if( !strcmp("",diskName) )
return -1;
if( !fat_getDiskTotalSpace(diskName, total) )
return -1;
if( !getDirSize(diskName, true, used) )
return -1;
*used = _usedSecNums;
if( *total <= *used ){
*freeSpace = 0;
}else{
*freeSpace = *total - *used;
}
return 0;
}
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