1 files changed, 138 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/fs/fat_misc.c b/sdk-modifications/libsrc/fs/fat_misc.c
new file mode 100644
index 0000000..c0f62ac
--- /dev/null
+++ b/sdk-modifications/libsrc/fs/fat_misc.c
@@ -0,0 +1,138 @@
+//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;
+}