Filesystem¶

Include: Use System\FileSystem.pkg

The Filesystem reference covers sequential file input/output, file and directory management, path resolution, and advanced channel control.

Use Seq_New_Channel when opening files in application code; see Sequential Channels.

Opening and closing¶

• Direct_Input opens a file or directory for sequential input.
• Direct_Output creates or truncates a sequential output file.
• Append_Output appends sequential output to an existing file or creates a new file.
• Close_Input closes input.
• Close_Output closes output.

Reading and writing¶

• Read reads delimited values.
• Read_Line reads a line.
• Read_Hex reads hex-encoded text.
• Read_Block reads bytes into a string, WString, or UChar[].
• Write writes text without a separator or line terminator.
• Write_Line writes text followed by the current line terminator.
• Write_Hex writes text as hex-encoded output.
• Write_Block writes bytes from a string or UChar[].
• Flush_Output flushes buffered output.

File management¶

• File_Exist checks whether a path exists.
• Copy_File copies files or directory contents.
• Rename_File renames or moves files and directory contents.
• Erase_File deletes files.
• Get_File_Path returns the resolved path for a file.
• Get_File_Mod_Time returns a file or directory timestamp.
• Make_Temp_File creates a temporary file name.
• Valid_Drive checks whether a root or drive is valid.
• Make_Directory creates a directory.
• Remove_Directory removes a directory.
• Get_Current_Directory returns the current working folder.
• Set_Current_Directory sets the current working folder.

Path resolution¶

DFPATH explains DF_OPEN_PATH, the semicolon-separated open path used to resolve relative file names for the FILE driver.

Advanced channel details¶

Sequential Channels explains channel allocation, current input/output channels, position and size commands, and the no-channel close forms.