CODEWITHSUNDEEP
cstring
MSH
MSH

Reputation: 163

Difficulty adding substrings to a string in c

I encountered a problem when trying to add substrings to a string in C: I have a variable that holds data, for example: "0%, 35.6, 0:1,..." and I'm trying to add titles to each parameter, for example: "title1: 0%, title2: 35.6, title3: 0:1,...". I've tried several methods, including using strtok(), but with no luck so far. In this case I suspect a casting problem (the variable that holds the data (Debug in the code below) is an UINT8*), but I don't seem to be able to solve it. Could someone please offer me some directions?

 static void SendDebug(UINT8* Debug) {
    char *TempToken;
    char *array[13] = {"some", "titles", "for", "substrings", "here", "...", "...", "...", "...", "...", "...", "...", "..."};
    int j=0;
    int i=0;

    sprintf((char *) Debug, "%s,","New_String:");
    strcpy(TempToken, (char *)Debug);

    for (i=0; i<13; i++) {
        strcat((char *)Debug, array[i]);
        while (TempToken[j] != ',' && TempToken[j] != '\0') {
            strcat((char *)Debug, (char *)TempToken[j]);
            j++;
        }
        j++;
    }
}

Thanks a lot!

Upvotes: 1

Views: 73

Answers (1)

Some programmer dude
Some programmer dude

Reputation: 409176

TempToken is just an uninitialized pointer, using it in any way (except to initialize it) leads to undefined behavior.

Declare it either as a character array big enough, or dynamically allocate it.

Upvotes: 4

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