main.c

#include <stdio.h>
#define ARENA_IMPLEMENTATION
#include "arena.h"

// String Builder is any structure that has at least three fields: items, count, and capacity.
// - `items` MUST be a pointer to char and it points to the beginning of the buffer that stores the string.
// - `count` MUST be size_t and it indicates the size of the string.
// - `capacity` MUST be size_t and it indicates how much memory was already allocated for the String Builder.
// String Builder in a sense is just a Dynamic Array of characters
// TODO: maybe arena.h should ship its own String_Builder type?
typedef struct {
    char *items;
    size_t count;
    size_t capacity;
} String_Builder;

int main()
{
    Arena a = {0};

    // TODO: examples for functions like
    // - arena_alloc, arena_realloc
    // - arena_strdup, arena_memdup

    {
        printf("-- sprintf --\n");
        printf("%s", arena_sprintf(&a, "Foo, %s, %d, %f\n", "Bar", 69, 420.1337));
    }
    arena_reset(&a);

    {
        printf("-- Dynamic Arrays --\n");
        String_Builder sb = {0};
        char name[] = {'W', 'o', 'r', 'l', 'd'};

        // Append NULL-terminated string
        arena_sb_append_cstr(&a, &sb, "Hello, ");

        // Append sized buffer
        arena_sb_append_buf(&a, &sb, name, sizeof(name));

        // Append using format strings
        arena_sb_append_format(&a, &sb, "\n%d", 5);
        arena_sb_append_format(&a, &sb, " %s", "foo");

        // Append '\0' to make the built string NULL-terminated
        arena_sb_append_null(&a, &sb);

        printf("%s\n", sb.items);

        // TODO: add more examples for arena_da_append and arena_da_append_many
    }
    arena_reset(&a);

    arena_free(&a);

    return 0;
}