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GoFiler Legato Script Reference
Legato v 1.4j Application v 5.22b
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Chapter Six — File Functions (continued)
Overview
The OpenMappedTextFile function opens a file as a Mapped Text Object.
Syntax/Parameters
Syntax
handle = OpenMappedTextFile ( string name, [qword mode] );
Parameters
name
A string containing a fully qualified path and filename.
mode
An option qword containing bitwise flags specifying the method of opening the Mapped Text Object. The flags are as follows:
| MFC_OPEN_READ | 0x0000000000000008 | Open as read-only share | ||
| MFC_ALLOW_READ_ONLY | 0x0000000000000010 | Open allow read-only | ||
| MFC_NO_CACHE | 0x0000000000000080 | Do not read cache (HTTP) | ||
| MFC_RECOVERY_TRACKING | 0x0000000000001000 | Use recovering tracking | ||
| MFC_UNDO_TRACKING | 0x0000000000002000 | Keep undo information | ||
| MFC_ALLOW_TABS | 0x0000000000004000 | Allow and process tabs, by default tabs are converted and formatted to spaces | ||
| MFC_ALLOW_SHARE_TRACKING | 0x0000000000010000 | Allow file share tracking |
If omitted, the value is 0x00000000 is used, meaning open as Read/Write, allow read share and converted tabs.
Return Value
Returns a handle to a Mapped Text Object or NULL_HANDLE on failure. Use the GetLastError function to retrieve error information.
Remarks
Mapped Text Objects allow files and strings to be accessed, modified and altered at a high-level by line number or by row (X) and column (Y) position. Mapped Text Objects also allow more complicated editing actions, such as undo, through transactions, which makes them ideal for controlling text inside objects such as edit windows. They also do not alter the source file until the object is saved or exported via function calls.
When a file is opened, it is mapped line by line into an entry point table which is then used to manage changes to the data model. Under the Mapped Text Object model, alterations to a file are not saved until MappedTextSave is called.
If opening with a schema, such as HTTP, the MFC_OPEN_READ must be set since such files cannot be opened with write access.
Mapped Text Objects support UNICODE and accept line feed, carriage returns, and a combination thereof as line endings.
A Mapped Text Object should be closed via the CloseHandle function.
Related Functions
Platform Support
Go13, Go16, GoFiler Complete, GoFiler Corporate, GoFiler, GoFiler Lite, GoXBRL
Legato IDE, Legato Basic
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