Method

GLibMatchInfofetch_pos

Declaration

gboolean
g_match_info_fetch_pos (
  const GMatchInfo* match_info,
  gint match_num,
  gint* start_pos,
  gint* end_pos
)

Description

Retrieves the position in bytes of the match_num‘th capturing parentheses. 0 is the full text of the match, 1 is the first paren set, 2 the second, and so on.

If match_num is a valid sub pattern but it didn’t match anything (e.g. sub pattern 1, matching “b” against “(a)?b”) then start_pos and end_pos are set to -1 and TRUE is returned.

If the match was obtained using the DFA algorithm, that is using g_regex_match_all() or g_regex_match_all_full(), the retrieved position is not that of a set of parentheses but that of a matched substring. Substrings are matched in reverse order of length, so 0 is the longest match.

Available since:

2.14

Parameters

`match_num`	`gint`
	Number of the sub expression.
`start_pos`	`gint*`
	Pointer to location where to store the start position, or `NULL`.
	The argument will be set by the function.
	The argument can be `NULL`.
`end_pos`	`gint*`
	Pointer to location where to store the end position, or `NULL`.
	The argument will be set by the function.
	The argument can be `NULL`.

Return value

Returns:	`gboolean`
	`TRUE` if the position was fetched, `FALSE` otherwise. If the position cannot be fetched, `start_pos` and `end_pos` are left unchanged.