Thread: Reading specific values in text file - C

Here is how you might use strtok.

Code:

#include <stdio.h>
#include <string.h>

int main ( ) {
  char line[] = "{015;scanner;7891150019508;;;29}\n";
  const char *tok = ";\n";
  char *p;
  for ( p = strtok(line,tok) ; p != NULL ; p = strtok(NULL,tok) ) {
    printf("Token=%s\n",p);
  }
  // demonstrate that strtok changes line
  printf("Original line=%s\n",line);
  return 0;
}



$ gcc -Wall foo.c
$ ./a.out 
Token={015
Token=scanner
Token=7891150019508
Token=29}
Original line={015

Greetings @Salem!
I managed to solve my problem without strtok (but I had the help of my uncle, and he is a very experienced programmer ), but I'm going to adapt my code with it because it will make so much easier when finding an 'item;' (since I will have three values in this line) if I use strtok, just need to put a int count inside the loop and store the third to fifth value, and now I understand and know how to use it!
Here is my solution without the strtok:

Code:

char *result2;
char *result3;


void *LocalizaItem(char *str) //str = "{015;scanner;7891150019508;;;29}";
{
    char * pini;
    char * pout;
    char * pt1;
    int pt2;
    int pt3;
    char buffer[1000], buffer2[1000], buffer3[1000];
    char *result;
    char nada[2] = "\0";
    GtkTextIter diter;
    
    /*======= Limpando globais no inicio da funcao =======*/
    
    result2 = (char *)malloc(strlen(nada)); 
    
        strcpy(result2,nada) ;
    //printf("result monitorado==>%s<==\n", result2);
    
    result3 = (char *)malloc(strlen(nada)); 
    
        strcpy(result3,nada) ;
    //printf("result monitorado==>%s<==\n", result3);
    /*====================================================*/
    
    pt1 = str;
   
    
  
    
    
    if(strstr(str,"scanner;") != NULL){
            printf("\n=======================================\n");
            printf("===== 'scanner' found in log =====\n");
            printf("=======================================\n");
        
        if((pini = strstr (str,"scanner;"))== NULL)
        {
            strcpy(buffer,"   ");            
            
        }
        
        
        pini = pini + (strlen("scanner;"));        
        
        pt2 = pini - pt1 ;        
        
            
            if((pout = strstr (pini,";"))== NULL)
            {
                strcpy(buffer,"   ");                
                
            }
            pt3 = pout - pt1 ;
        
        
            memset(buffer, 0, sizeof(buffer));                       
                       
            strncpy(buffer,pini,pt3-pt2);         
        
        }

    result = (char *)malloc(strlen(buffer) + 1); /* +1 = DFTTZ! */
    strcpy(result,buffer) ;
    printf("result==>%s<==\n", result);

return result; //returning this => 7891150019508

}

The char *result2 and result3 are the variables I was using to store data if I recieve the "item;" in the line, and thats just a small part of the code, I actually created an if statement in every kinda of line I will recieve ("scanner;", "item;", "key;" and a few others).

Thank you very much for your attention and time Salem!

So what is the purpose of result2, result3 and nada?

Except to be a lot of small memory leaks.