Reading Characters from a string

[Simon Knight]

I am attempting to read the first three characters of a string inside a library extension written in Livecode Builder. My test handler is below and I have tried various different versions without luck.

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public handler calLibraryVersion() returns String
	variable tOsSystem as String
	variable tTest as String
	put the operating system into tOsSystem  -- "mac of Calendar Library"
	get char 1 to 3 of tOsSystem
	put the result into tTest
	return "Library version 1.14.58-7 on OS : " & tTest
end handler

The dictionary entry for RangeCharOf contains this code snip:

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get char 5 to 10 of tString // Evaluates chars 5 to 10

My handler runs but returns the full version of tOsSystem.

What have I missed?

[lcwill]

(I'm assuming you are on mac)

Ignore extra "\" on the strings with "."

The expected result for your handler would be:
"Library version 1\.14\.58-7 on OS : mac"

(Taken from the Dictionary)

Returns a string describing the operating system that LiveCode is running on. The possible values are:
"windows" - 32-bit and 64-bit Windows
"mac" - Desktop OS X
"ios" - iOS (iPhone and iPad)
"android" - Android Linux devices
"linux" - All other Linux platforms

If you are getting a result different from the above could you specify Engine version and OS?

Code: Select all

public handler calLibraryVersion() returns String
	variable tOsSystem as String
	variable tTest as String
	/* If running on macOS you are putting "mac" inside tOsSystem */
	put the operating system into tOsSystem
	/* You could also directly do here: 
	  *   put char 1 to 3 of tOsSystem into tTest
	  */
	get char 1 to 3 of tOsSystem
	put the result into tTest

	/* You could also directly do like:
	  *  return "Library version 1\.14\.58-7 on OS : " & char 1 to 3 of tOsSystem
	  */
	return "Library version 1\.14\.58-7 on OS : " & tTest
end handler

A simplified version of the handler could be:

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public handler calLibraryVersion() returns String
	return "Library version 1\.14\.58-7 on OS : " & char 1 to 3 of the operating system
end handler

PD: ignore extra "\" on the string "Library version 1\.14\.58-7 on OS : "

[Simon Knight]

Thanks for your code. I have created an extension just to test the command 'the operating system' and it is working as expected. I need to try and discover why I was seeing erroneous results. Yes I am using a mac and I was using a version of Livecode IDE where I had tried to update the code signing because I had modified the Info.plist file.

[Simon Knight]

Should have said :

I'm using Mac OS 14.5 Sonoma
Livecode 9.6.12

The edits to the Info.plist file were i.a.w. instructions in bug report 24054 https://quality.livecode.com/show_bug.cgi?id=24054

So could you add this line in the plist - just below the one for "NSCalendarsUsageDescription":

<key>NSCalendarsFullAccessUsageDescription</key>
<string>LiveCode requires permission to access your Calendars</string>

Note: There are 2 plist files where you have to try this change:

/Applications/LiveCode <version>.app/Contents/Info.plist -> This is for granting access to the LiveCode IDE

/Applications/LiveCode <version>.app/Contents/Tools/Runtime/Mac OS X/x86-64/Standalone.app/Contents/Info.plist --> This is for the standalone

and then run the following Terminal command :

codesign --force --deep -s - /path_to_LiveCode.app

It appears that while the Terminal command solved the problem that I was reporting it is likely that if fails to correctly code sign all the components which could be leading to odd faults.

Given the issues I have seen I decided to pause the work I was doing and wait until RunRev update the Info.plist file in a properly signed build of the Livecode IDE.