#include "str.h"

void str_init(struct str* self)
{
    assert(self);
    self->size = 0;
    self->capacity = 0;
    self->value = NULL;
}

void str_free(struct str* self)
{
    assert(self);
    free(self->value);
    self->value = NULL;
    self->size = 0;
    self->capacity = 0;
}

void str_push(struct str* self, char element)
{
    assert(self);

    if (self->capacity == 0)
    {
        self->capacity = 1;
        self->value = calloc(self->capacity, sizeof(char));
    }

    if (self->size + 2 >= self->capacity)
    {
        self->capacity *= 2;
        char* data = realloc(self->value, sizeof(char) * self->capacity);
        assert(data);
        self->value = data;
    }

    self->value[self->size] = element;
    self->size++;
    self->value[self->size] = '\0';
}

void str_extend(struct str* self, char const* rhs)
{
    assert(self);
    assert(rhs);

    size_t sz = strlen(rhs);

    for (size_t i=0; i<sz; i++)
    {
        str_push(self, rhs[i]);
    }
}

void str_format(struct str* self, char const* format, ...)
{
    assert(self);
    assert(format);
    char buffer[MK_STRLEN];

    va_list lst;
    va_start(lst, format);

    vsnprintf(buffer, MK_STRLEN, format, lst);

    va_end(lst);

    str_extend(self, buffer);
}