Replace a specific line of text within a file

[ccowgill]

As the title states, what is the simplest way to replace a specific line of text within a file.

I need to have the ability to replace line 5 and line 7 of a particular file progammatically, based on the current annotation scale.

[Opie]

More details would be helpful. What type of object needs modification?

[ccowgill]

More details would be helpful. What type of object needs modification?

ye ask and ye shall receive.
Eagle Point uses *.set files to contain their plot scales as well as many other settings. When reducing point files, our office would like to use annotative blocks, so they will show up at acceptable sizes no matter the viewport scale. Eagle Point uses the plot scale factor to scale points when they are reduced. Our intention is to set the plot scale to 1 reduce the points (so they come in at a scale of 1) and then change the plot scale back. Or possible just set up the routine so the plot scale matches the current annotation scale (i.e. 1:1 would result in a 1 scale plot scale, 1:40 would result in a 40 scale plot scale, and so on.)

The 5th line of the *.set file contains the horizontal plot scale of the Eagle Point Project, the 7th line contains the vertical plot scale. I guess I really only need to be able to update the 5th line, as the 7th does not affect the scale of reduced points.

Here is the first 10 lines of a typical *.set file

EAGLE POINT / Systems
VERSION ad 1.0
EP Settings File
VERSION 1.0
AAPLAN000HORZSCALED 480
AAPLAN000UNITSI 21
AAPLAN000VERTSCALED 60
ACADPROTOTYPESEEDFILES Z:\Prototypes\Road Base.dwg
ALIGNMENTDATABASES Align001.MDB
CURRGRAPHICKEYS AAPLAN000

the scales are multiplied by 12 (inches in a foot). The actual scale is 40 horizontal, 5 vertical

[Opie]

Are you wanting the user to navigate to it? Or let the computer user the CurrentDataLocation folder as it is listed in Eagle Point's registry settings to locate this file?

[ccowgill]

Are you wanting the user to navigate to it? Or let the computer user the CurrentDataLocation folder as it is listed in Eagle Point's registry settings to locate this file?

I would say no to both. Our standard for reducing point files is that our base drawing and Eagle Point information is always in the same folder. So I would use the current drawing's folder, check to see if the file exists, and then run the program if it does.

[Opie]

• Make a backup copy of the file.
• You need to read the file into a list.
• Search the list for the right tag (my .set file does not have that tag as the fifth line).
• Change the number at the end to the right value
• Write the list back into the file.

A secondary routine to restore the backup file after reducing the points.

[ccowgill]

• Make a backup copy of the file.
• You need to read the file into a list.
• Search the list for the right tag (my .set file does not have that tag as the fifth line).
• Change the number at the end to the right value
• Write the list back into the file.

A secondary routine to restore the backup file after reducing the points.

so do the following?

;rename existing file
;create new file with old name and open for write
;open existing file for read
;(while read each line
;if wcmatch line matches beginning of line that needs to be changed
;replace with this line
;increment line counter)
;close both files

and

;erase new file
;rename existing file

[Opie]

Sounds about right to me.

[ccowgill]

Sounds about right to me.

I'll give it a shot and let you know how it goes.

[Opie]

You can do it. Be warned, I have had problems with Eagle Point when changing Eagle Point generated files. Hopefully, you won't have any of those problems.