Splitting text in C-CodePudding

I am trying to make a LCD-Display showing the title and artist of a song, in order to connect it to my home media setup. I want to pass the information through via serial connection in the following layout:

title;artist

This could be for example:

Stitches;Shawn Mendes
GANGNAM STYLE(강남스타일) M/V;PSY

As you can see: Spaces and non-english characters can be common. How would I split this in two different variables(title and artist)?

Note that I am a beginner in C, using it on my arduino Uno to make little hobby projects.

CodePudding user response：

as your separator is in ascii part you may just loop until the char is ';'

each utf8 multibytes chars are always > 127, so you may not have any false positive

#include <stdio.h>

char string[] = "GANGNAM STYLE(čččč강남스타일) M/V;PSY" ;

int main(void){
    char *artist, *title = string, *p = string ;

    while( *p && *p != ';' ) p   ;
    
    if( !*p ) return 1 ; // ';' not found

    *p   = 0 ; // end of title string, overwrite the ';'
    
    artist = p ; // start of artist string
    
    printf( "title %s\nartist %s\n", title, artist ) ;
    
    return 0 ;
}

CodePudding user response：

Here's my function that mimics Python's split() method.

// Split string by a delimeter, results saved to linedata
void split_by_delim(char *src, char *delim, char **linedata, size_t size) 
{
    char *tok = strtok(src, delim);
    size_t sz = 0;

    while (tok != NULL && sz < size) {
        linedata[sz  ] = tok;     
        tok = strtok(NULL, delim);
    }
}

Usage:

char your_string[] = "GANGNAM STYLE(강남스타일) M/V;PSY";
char *data[2];
split_by_delim(your_string, ";", data, 2);

printf("Song: %s\n", data[0]);
printf("Artist: %s\n", data[1]);

Just field tested this with C11. But if you don't have access to standard library, you'll have to go with the @r043v's solution.