#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include "clog.h"

char* repeat(char char_to_repeat, int num_times_to_repeat) { // returns memory on HEAP
    int num_bytes_to_allocate = num_times_to_repeat + 1;  // include space for '\0'
    // NAMING TIP
    // ∙ Use ▒_bytes to include the number of bytes including '\0'.
    // ∙ Use ▒_chars to include the number of characters that would be printed,
    //   excluding the '\0'
    // ∙ Names like str_size can be ambiguous and lead to bugs.

    // Alocate a new string sufficient for 'num_times_to_repeat' chars and
    // assign the address of the first character to 'ch_repeated_str'.
    char* ch_repeated_str = malloc(num_bytes_to_allocate * sizeof(*ch_repeated_str));
    for(int i = 0; i < num_times_to_repeat; i++) {
        ch_repeated_str[i] = char_to_repeat;  // copy one character
    }
    ch_repeated_str[num_times_to_repeat] = '\0';  // Write null terminator at end of string

    return ch_repeated_str;
}

int main(int argc, char* argv[]) {
    char* s = repeat('*', 5);  // 1st call to malloc(…)
    log_str(s);
    free(s);
    // IMPORANT: Call free(…) on every block that was allocated by malloc(…).
    //  └─ Corollary: Number of calls to malloc(…) should equal number of calls to free(…).
    
    s = repeat('3', 3);  // 2nd call to malloc(…)  -- WARNING: not freed
    log_str(s);
    free(s);

    s = repeat('4', 4);  // 3rd call to malloc(…)  -- WARNING: not freed
    log_str(s);
    free(s);

    s = repeat('5', 5);  // 4th call to malloc(…)  -- WARNING: not freed
    log_str(s);
    free(s);

    // WARNING:  We are missing three calls to free(…).
    return EXIT_SUCCESS;
}

// Autocomplete:  Ctrl-P
/*
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