Difference between revisions of "83Plus:Software:usb8x/Asm Interface/MSD/DOS getDirEntry"
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'''Minimum usb8x version:''' 0.10 | '''Minimum usb8x version:''' 0.10 | ||
| − | Gets directory entry for a specified file/folder. A directory entry is useful for certain functions such as [[..DOS_getFileSize|DOS_getFileSize]]. | + | Gets directory entry for a specified file/folder. A directory entry is useful for certain functions such as [[../DOS_getFileSize|DOS_getFileSize]]. |
=== Inputs === | === Inputs === | ||
Revision as of 16:30, 11 September 2006
Synopsis
Name: DOS_getDirEntry
Minimum usb8x version: 0.10
Gets directory entry for a specified file/folder. A directory entry is useful for certain functions such as [[../DOS_getFileSize|DOS_getFileSize]].
Inputs
- HL is the stating cluster of a directory (obtained with [[../FAT_getStartingCluster|FAT_getStartingCluster]])
- BC is the entry number of a file
Outputs
- HL points to the directory entry of the file/directory
- C set if problems
Destroys
- AF, BC, DE, HL
Notes
This works with both file and folder names. It also works especially well with DOS_getNextFile. This function is useful if you need to get the directory entry for a file just found with [[../DOS_getNextFile|DOS_getNextFile]].
Example code to get directory entry for first file in the root directory:
ld hl,sDirectory U_CALL FAT_getStartingCluster ld bc,-1 U_CALL DOS_getDirEntry ... sDirectory: DB "/",0
If you are writing an application, you must copy the strings you use to RAM first, or else usb8x will not be able to see them.
See Also
- [[../FAT_lookupPath|FAT_lookupPath]] - Find whether specified file/directory exists
- [[../DOS_getNextFile|DOS_getNextFile]] - Get first/next file in a specified directory
