#define _POSIX_C_SOURCE 200809l

#include <stdlib.h>

#include "fstr.h"
#include "err.h"
#include "config.h"

void fstr_add_space(fstr_t *fs)
{
	fs->s = erealloc(fs->s, fs->len + fs->space + DEF_CHUNKSIZE + 1);
	fs->space += DEF_CHUNKSIZE;
}

void fstr_append_char(fstr_t *fs, char c)
{
	if (!fs)
		return;
	if (fs->space < 1)
		fstr_add_space(fs);
	// I don't know if this is faster
	if (fs->s[fs->len] != c)
		fs->s[fs->len] = c;
	fs->s[++fs->len] = '\0';
	fs->space--;
}

void fstr_clear(fstr_t *fs)
{
	fs->space += fs->len;
	fs->len = 0;
}