[gtksourceview] pcre2: use pcre2_substring_number_from_name()

[Christian Hergert <chergert src gnome org>]

commit 21f03160b5929440f381556a486c81fb59a1e367
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 1 15:07:29 2020 -0700

    pcre2: use pcre2_substring_number_from_name()

 gtksourceview/implregex.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)
---
diff --git a/gtksourceview/implregex.c b/gtksourceview/implregex.c
index 411efe9c..77b4f2f7 100644
--- a/gtksourceview/implregex.c
+++ b/gtksourceview/implregex.c
@@ -493,7 +493,7 @@ impl_match_info_fetch_named_pos (const ImplMatchInfo *match_info,
                                  int                 *start_pos,
                                  int                 *end_pos)
 {
-       PCRE2_SPTR tabptr;
+       int num;
 
        g_return_val_if_fail (match_info != NULL, FALSE);
        g_return_val_if_fail (match_info->match_data != NULL, FALSE);
@@ -501,18 +501,11 @@ impl_match_info_fetch_named_pos (const ImplMatchInfo *match_info,
        g_return_val_if_fail (start_pos != NULL, FALSE);
        g_return_val_if_fail (end_pos != NULL, FALSE);
 
-       tabptr = match_info->regex->name_table;
+       num = pcre2_substring_number_from_name (match_info->regex->code, (PCRE2_SPTR)name);
 
-       for (gsize i = 0; i < match_info->regex->name_count; i++)
+       if (num >= 0)
        {
-               PCRE2_SIZE n = (tabptr[0] << 8) | tabptr[1];
-
-               if (g_strcmp0 (name, (const char *)(tabptr+2)) == 0)
-               {
-                       return impl_match_info_fetch_pos (match_info, n, start_pos, end_pos);
-               }
-
-               tabptr += match_info->regex->name_entry_size;
+               return impl_match_info_fetch_pos (match_info, num, start_pos, end_pos);
        }
 
        return FALSE;