/* Creates and returns a new line_reader that reads its input from FD. Returns
a new line_reader if successful, otherwise returns NULL and sets errno to an
appropriate value.
The accepted forms for ENCODING are listed at the top of
encoding-guesser.h. */
struct line_reader *
line_reader_for_fd (const char *encoding, int fd)
{
struct line_reader *r;
r = calloc (1, sizeof *r);
if (r == NULL)
return NULL;
r->fd = fd;
r->buffer = malloc (LINE_READER_BUFFER_SIZE);
if (r->buffer == NULL)
goto error;
r->head = r->buffer;
r->length = 0;
if (fill_buffer (r) < 0)
goto error;
r->encoding = xstrdup (encoding_guess_head_encoding (
encoding, r->buffer, r->length));
if (!get_encoding_info (&r->encoding_info, r->encoding))
{
errno = EINVAL;
goto error;
}
if (encoding_guess_encoding_is_auto (encoding)
&& !strcmp (r->encoding, "ASCII"))
{
r->state = S_AUTO;
r->auto_encoding = encoding ? xstrdup (encoding) : NULL;
}
else
r->state = r->encoding_info.unit == 1 ? S_UNIBYTE : S_MULTIBYTE;
return r;
error:
line_reader_free (r);
return NULL;
}
/* exported, looks at all possible instr_info_t templates
*/
bool
instr_is_encoding_possible(instr_t *instr)
{
const instr_info_t *info = get_encoding_info(instr);
return (info != NULL);
}
