#include <notmine.h>
#include <string.h>
#include <stdlib.h>

#include <stdio.h>
#include <debug.h>

//https://stackoverflow.com/a/779960/8229149
char *str_replace(char *orig, char *rep, char *with) {
    char *result; // the return string
    char *ins;    // the next insert point
    char *tmp;    // varies
    int len_rep;  // length of rep (the string to remove)
    int len_with; // length of with (the string to replace rep with)
    int len_front; // distance between rep and end of last rep
    int count;    // number of replacements

    // sanity checks and initialization
    if (!orig || !rep)
        return NULL;
    len_rep = strlen(rep);
    if (len_rep == 0)
        return NULL; // empty rep causes infinite loop during count
    if (!with)
        with = "";
    len_with = strlen(with);

    // count the number of replacements needed
    ins = orig;
    for (count = 0; (tmp = strstr(ins, rep)); ++count) {
        ins = tmp + len_rep;
    }

    tmp = result = malloc(strlen(orig) + (len_with - len_rep) * count + 1);

    if (!result)
        return NULL;

    // first time through the loop, all the variable are set correctly
    // from here on,
    //    tmp points to the end of the result string
    //    ins points to the next occurrence of rep in orig
    //    orig points to the remainder of orig after "end of rep"
    while (count--) {
        ins = strstr(orig, rep);
        len_front = ins - orig;
        tmp = strncpy(tmp, orig, len_front) + len_front;
        tmp = strcpy(tmp, with) + len_with;
        orig += len_front + len_rep; // move to next "end of rep"
    }
    strcpy(tmp, orig);
    return result;
}



/* char *str_index_replace(char *orig, int rep_s, int rep_e, char *with) {
    // Ugh, Re-worked the preceding str_replace function to work with indexes
    char *result; // the return string
    char *ins;    // the next insert point
    char *tmp;    // varies
    int len_rep;  // length of rep (the string to remove)
    int len_with; // length of with (the string to replace rep with)
    int len_front; // distance between rep and end of last rep

    // sanity checks and initialization
    if (!orig || !rep_e){
        DEBUG_ERROR("[orig or rep_e is false] *orig=%p; rep_s=%d, rep_e=%d\n", 67, orig, rep_s, rep_e);
        return NULL;
    }
    len_rep = rep_e - rep_s;
    if (len_rep == 0){
        DEBUG_ERROR("[rep empty]\n", 72);
        return NULL; // empty rep causes infinite loop during count
    }
    if (!with)
        with = "";
    len_with = strlen(with);

    tmp = result = malloc(strlen(orig) + (len_with - len_rep) + 1);

    if (!result) {
        DEBUG_ERROR("[bad malloc]", 83);
        return NULL;
    }

    // first time through the loop, all the variable are set correctly
    // from here on,
    //    tmp points to the end of the result string
    //    ins points to the next occurrence of rep in orig
    //    orig points to the remainder of orig after "end of rep"
    ins = orig + rep_s;
    len_front = ins - orig;
    tmp = strncpy(tmp, orig, len_front) + len_front;
    tmp = strcpy(tmp, with) + len_with;
    orig += len_front + len_rep; // move to next "end of rep"
    strcpy(tmp, orig);
    return result;
} */