[BUG]

[Hideki IWAMOTO]

Hi. Yamaguchi san.

There are some problems in searching using the pattern
which contains '^' at the head.

======== example 1 ========
$ cat a.c
vsprintf
sprintf
asprintf
$ global -sx '^v?sprintf'
vsprintf            1 a.c              vsprintf
$ global -sx '^(v)?sprintf'
sprintf             2 a.c              sprintf
vsprintf            1 a.c              vsprintf
===========================

Although '^v?sprintf should be equivalent to '^(v)?sprintf',
the former does not match 'sprintf'. 

I think that the following code in gtags_first() is broken
and it should be removed.

  617                 const char *p;
  618                 /*
  619                  * If the pattern include '^' + some non regular 
expression
  620                  * characters like '^aaa[0-9]', we take prefix read method
  621                  * with the non regular expression part as the prefix.
  622                  */
  623                 if (!(flags & GTOP_IGNORECASE) && *pattern == '^' && *(p 
= pattern + 1) && !isregexchar(*p)) {
  624                         int i = 0;
  625 
  626                         while (*p && !isregexchar(*p) && i < IDENTLEN)
  627                                 prefix[i++] = *p++;
  628                         prefix[i] = '\0';
  629                         key = prefix;
  630                         dbflags |= DBOP_PREFIX;
  631                 } else {


Reducing the length of the string copied to prefix[] by 1 byte
does not solve the following problem. 

======== example 2 ========
$ cat b.c
geta
seta
$ global -sx '^get|^set'
get                 1 b.c              geta
$ global -sx '(^get)|(^set)'
get                 1 b.c              geta
set                 2 b.c              seta
===========================

-- 
Hideki IWAMOTO <address@hidden>