How to left pad a string with spaces

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1

I’am searching for a string function wich filled up the string to the left side.

problem:

I need a string with fixed lenght a.e. string[10]. A.e. i have an input string with 5 character [a b c d e]. Now i will automaticly filled up ist with [x x x x x a b c d e]. The x schould be blanks. I search an function witch can do this dynamicly. The lenght of the input string can i find out with the function brsstrlen. But for the filling up with blanks ich have no idea.

Have somebody done such function or an idea to solve this problem?

Best regards dirk

2

Hi,

there some different possibilities to solve it, here’s one quick try as proposal from my side.

Before:

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After:

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image1187×514 21.2 KB

And here’s the sample task, of course this could / should be wrapped into a library:
StrTest.zip (1.3 KB)

Best regards!

5 Likes
3

PROGRAM _INIT

brsmemcpy(ADR(str_in),ADR('abcde'),5);
brsmemcpy(ADR(str_in_last),ADR(str_in),5);
brsmemcpy(ADR(str_out),ADR('          '),10);
brsmemcpy(ADR(str_out)+5,ADR(str_in),5);

END_PROGRAM

PROGRAM _CYCLIC

IF (brsmemcmp(ADR(str_in),ADR(str_in_last),5) <> 0) THEN
	brsmemcpy(ADR(str_out)+5,ADR(str_in),5);
	brsmemcpy(ADR(str_in_last),ADR(str_in),5);
END_IF

END_PROGRAM

VAR
str_out : STRING[10];
str_in : STRING[5];
str_in_last : STRING[5];
END_VAR

4

If this a structured text program, you could also take a look at the STANDARD library and the functions INSERT,LEN,MID,LEFT,RIGHT,DELETE and CONCAT.

5

There are many ways how to solve it. I just marked the first one as a solution. @Dirk_Westphal feel free to update us what was your final solution.