Re: Missing first index entry

[Gavin Smith]

On Tue, Feb 22, 2022 at 03:46:36PM +0300, Sergey Matveev wrote:
> run "makeinfo foo.texi" and info ./foo.info says that no indices found
> on "i"/"I" commands. If I rename "My" node to "My Index", then info
> won't note about missing indices. I did not find explicit note about
> that requirement.

I've added a note to the manual of this requirement.


> If I try to search "i foot<Enter>", then it finds "FOOTball" section and
> jumps to it as expected. But "i basket<Enter>" does not find anything.
> However "i basketball<Enter>" works as expected. "I ball<Enter>" shows
> only "football" entry. "I basket<Enter>" does not produce anything.
> "I foot<Enter>" works as expected.
> 
> When I tried to find how index entries are found and filled, I was sure
> that index_index variable is properly filled with two ("football",
> "basketball") entries.

I've committed the following fix (commit  730d600e2a):

diff --git a/info/indices.c b/info/indices.c
index 6f5ef8a1f1..f798c61290 100644
--- a/info/indices.c
+++ b/info/indices.c
@@ -338,7 +338,7 @@ next_index_match (FILE_BUFFER *fb, char *string, int 
offset, int dir,
 
       if (i < 0 || !index_index[i])
        {
-          offset = 0;
+          offset = -1;
           index_initial = 1;
        }
     }
@@ -355,7 +355,7 @@ next_index_match (FILE_BUFFER *fb, char *string, int 
offset, int dir,
 
       if (i < 0 || !index_index[i])
        {
-          offset = 0;
+          offset = -1;
           index_initial = 0;
           index_partial = 1;
        }

offset is set to -1 elsewhere in the code to reset/initialise the index
search.

Please feel free to report if you find any other problems with the index
search in Info.