Copying strings and justified message popups

[TurboMetrologist]

Hi, two questions. Has anyone created a message popup that creates a justified format, or one that automatically inserts newlines? and, how do you use a pointer to copy a string from a beginning point to an end point. That is, if my string is 100 characters long, how can I copy from character 25 to 50?

Here is the start of my function

void  simpleMessage(char *title, char *message){
	int maxChars=75;
	char tempString[1000],tempString2[100];
	char *ptr;
	strncpy (tempString, message,maxChars);
	for(i=0,j=0;i<((strlen(message)/maxChars)-1);i++,j++){
		ptr=strcat (tempString, "\n");
		//here I need to copy the string starting at the pointer location to tempString2
		//...
		ptr=strcat(tempString,tempString2);
	}
	MessagePopup(title,tempString);
return;
}

 Something I've considered, but I'll get to it when I get to it, is that the above would cut words apart, so I'd need to insert the new lines in place of a space character some +/- 10 characters of the max char length of the message.

[TurboMetrologist · Accepted solution]

Here is my solution! 😄

void justifiedMessage(int maxChars,char *title, char *message){
    int i=0,j=0,k=0;
    char fullString[1000],tempString[1000];
    char *ptr=NULL;
    strcpy (tempString, message);
    ptr=strtok(tempString," ");
    strcpy(fullString,tempString);
    ptr=strcat(fullString," ");
    while((ptr=strtok(NULL," "))!=NULL){
        i++;
        ptr=strcat(fullString,ptr);
        j=strlen(fullString);
        j=j-k*maxChars;
        if(j<=maxChars)
            ptr=strcat(fullString," ");
        else{
            ptr=strcat(fullString,"\n");
            k++;
        }
    }
    MessagePopup(title,fullString);
return;
}

[Jackie_B]

Hi TurboMetrologist,

I am glad to see you were able to resolve your first question! Regarding the pointer to copy a string from a designated beginning point to an end point, the following is some coding that will work to serve this purpose:

#include <formatio.h>
#include <ansi_c.h>
int main (int argc, char *argv[])
{
    char str1[] = "National Instruments CVI/LabWindows";
	char str2[40];

	CopyString (str2, 0, str1, 4, 10);
	printf("Source String %s \n",str1);
	printf("String Copied with Copy String %s \n", str2);
	getchar();
    return 0;
}

In this code, the CopyString function is used to start copying from the 4th character for a total of 10 bytes. Good luck with your code and I hope you have a great day!

Regards,

Jackie

[TurboMetrologist]

Hey, thanks, that was more obvious than I was thinking.
I used this solution to grab between two instances of a delimiter.

char *getBetween(char *string,int firstInstance,int secondInstance,char *marker){
    int i=0,j=0,k=0;
    static char tempString[100];
    char *ptr=NULL;
    ptr=strtok(string,marker);
    while((ptr=strtok(NULL,marker))!=NULL){
        i++;
        if(i>=secondInstance)
            break;
        else if (i==firstInstance){
            strcpy(tempString,ptr);
        }
        else if (i>firstInstance){
            strcat(tempString,marker);
            strcat(tempString,ptr);
        }
    }
return tempString;
}

[Jackie_B]

Hi TurboMetrologist, 

Glad to hear you have been successful in your coding ventures! There are many ways to do this and if you have found a solution that works for you, then I think you are good to go! Have a great day and good luck with your project!

Regards,

Jackie