Function ProDOS_DirGetFirstFreeEntryOffset

source/ProDOS_FileSystem.h:363–395

@param nBase DiskImageOffset of directory returns DiskImageOffset ------------------------------------------------------------------------

	// returns DiskImageOffset
	// ------------------------------------------------------------------------
	int ProDOS_DirGetFirstFreeEntryOffset ( uint8_t *pDiskBytes, ProDOS_VolumeHeader_t *pVolume, int nBase )
	{
		int iNextBlock;
		int iPrevBlock;
		int iOffset = nBase + 4; // Prev Block, Next Block

		// Try to find a free file entry in this directory
		do
		{
			iPrevBlock = ProDOS_Get16( pDiskBytes, nBase + 0 );
			iNextBlock = ProDOS_Get16( pDiskBytes, nBase + 2 );

			for( int iFile = 0; iFile < pVolume->entry_num; iFile++ )
			{
				ProDOS_FileHeader_t file;
				ProDOS_GetFileHeader( pDiskBytes, iOffset, &file );

				if (file.kind == PRODOS_KIND_DEL)
					return iOffset;

				if (file.len == 0)
					return iOffset;

				iOffset += pVolume->entry_len;
			}

			nBase   = iNextBlock * PRODOS_BLOCK_SIZE;
			iOffset = nBase + 4;

		} while( iNextBlock );

		return 0;
	}

// --- ProDOS Volume Functions ---