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When the option -k is not given, the default key positions are now computed

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depending on the set of keywords.
This commit is contained in:
Bruno Haible
2003-02-11 11:09:27 +00:00
parent 6202aaadb1
commit 810fef43ae
18 changed files with 583 additions and 123 deletions
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27
src/keyword.cc
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@@ -47,7 +47,7 @@ static inline void sort_char_set (unsigned char *base, int len)
}
}
/* Initialize selchars and selchars_length.
/* Initializes selchars and selchars_length.
The hash function will be computed as
asso_values[allchars[key_pos[0]]] + asso_values[allchars[key_pos[1]]] + ...
We compute selchars as the multiset
@@ -57,14 +57,15 @@ static inline void sort_char_set (unsigned char *base, int len)
Furthermore we sort the selchars array, to ease detection of duplicates
later.
*/
void KeywordExt::init_selchars ()
void
KeywordExt::init_selchars (bool use_all_chars, const Positions& positions)
{
const char *k = _allchars;
unsigned char *key_set =
new unsigned char[(option[ALLCHARS] ? _allchars_length : option.get_max_keysig_size ())];
new unsigned char[(use_all_chars ? _allchars_length : positions.get_size ())];
unsigned char *ptr = key_set;
if (option[ALLCHARS])
if (use_all_chars)
/* Use all the character positions in the KEY. */
for (int i = _allchars_length; i > 0; k++, i--)
{
@@ -76,7 +77,7 @@ void KeywordExt::init_selchars ()
{
/* Iterate through the list of key_positions, initializing selchars
(via ptr). */
PositionIterator iter (option.get_key_positions ());
PositionIterator iter (positions);
for (int i; (i = iter.next ()) != PositionIterator::EOS; )
{
@@ -91,15 +92,6 @@ void KeywordExt::init_selchars ()
continue;
ptr++;
}
/* Didn't get any hits and user doesn't want to consider the
keylength, so there are essentially no usable hash positions! */
if (ptr == key_set && option[NOLENGTH])
{
fprintf (stderr, "Can't hash keyword %.*s with chosen key positions.\n",
_allchars_length, _allchars);
exit (1);
}
}
/* Sort the KEY_SET items alphabetically. */
@@ -109,6 +101,13 @@ void KeywordExt::init_selchars ()
_selchars_length = ptr - key_set;
}
/* Deletes selchars. */
void
KeywordExt::delete_selchars ()
{
delete[] _selchars;
}
/* ------------------------- Keyword_Factory class ------------------------- */