在C中逐行反序列化字符串

Question

I'm receiving as string in the following format over a UDP connection

1 2 7
1 3 5
1 4 6

I want to deserialize this string and write it into an array of structs of the following type

typedef struct RV{
    int server1;
    int server2;
    int weight;
}RV;

I'm using the following function to do that.

void deserialize(RV** arr, char* msg){
    int idx = 0;
    char line[10];

    while (fgets(line, sizeof line, msg)){
        RV rv;
        rv.server1 = atoi(strtok(line, " "));
        rv.server2 = atoi(strtok(NULL, " "));
        rv.weight = atoi(strtok(NULL,"\n"));
        memcpy(arr[idx], &rv, sizeof(rv));
        idx++;
    }

}

I continue to get a segmentation fault when I try to read this array.

Answer 1

Yup I do get a warning, but cant figure out another way to read a string line by line. Any suggestions.

You could change

    while (fgets(line, sizeof line, msg)){

to

    int n;
    while (sscanf(msg, "%9[^\n]\n%n", line, &n) > 0)
    {
        msg += n;

This drops the \\n , but we don't need them anyway.