#include <stdint.h>
#include <stddef.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "cescal/state.h"

int
state_init(struct cescal_state *state, const char *pathname)
{
    if (state == NULL || pathname == NULL) {
        errno = EINVAL;
        return -1;
    }

    state->in_fd = open(pathname, O_RDONLY);
    if (state->in_fd < 0) {
        return -1;
    }

    if (readbuf_init(&state->rb) < 0) {
        close(state->in_fd);
        return -1;
    }

    return 0;
}

void
state_close(struct cescal_state *state)
{
    close(state->in_fd);
    state->in_fd = -1;
}