s32 mfsRomReadFile(MfsDirID dirID, void* buf, s32 offset,u32 len)
s32 mfsRamReadFile(MfsDirID dirID, void* buf, s32 offset,u32 len)

Arguments

dirID   Directory ID of file

*buf   Buffer for storing data

offset   Read starting position

len   Size to be read

Return value

Size of data that was read (a negative value is an error)

Function

Reads data

Description

This function reads data of the file specified by dirID. If the address specified by buf is not at a 16-byte boundary, the speed will decrease somewhat because the data is read to an internal buffer and copied. If the offset or len value is greater than the file size, an error will occur. An error will also occur if offset+len exceeds the file size.

Main errors

MFS_ERR_NOTFOUND	Specified file not found
MFS_ERR_DEVICE	Device error An error occurred in an internally called Leo function. Since a Leo function error is stored in the variable mfsError, check this variable to perform processing.