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Don't accept empty keys.

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This commit is contained in:
Bruno Haible
2000-08-19 14:34:06 +00:00
parent 1518817d59
commit 308891a090
2 changed files with 11 additions and 11 deletions
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17
src/key-list.cc
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@@ -320,6 +320,13 @@ Key_List::read_keys (void)
exit (1);
}
}
/* Exit program if an empty string is used as key, since the comparison
expressions don't work correctly for looking up an empty string. */
if (min_key_len == 0)
{
fprintf (stderr, "Empty input key is not allowed.\nTo recognize an empty input key, your code should check for\nlen == 0 before calling the gperf generated lookup function.\n");
exit (1);
}
if (option[ALLCHARS])
option.set_keysig_size (max_key_len);
}
@@ -1523,14 +1530,8 @@ Key_List::output_lookup_function_body (const Output_Compare& comparison)
{
T (Trace t ("Key_List::output_lookup_function_body");)
/* Since `len' is of type `unsigned int', we can avoid comparing it
against zero. */
if (min_key_len == 0)
printf (" if (len <= MAX_WORD_LENGTH)\n");
else
printf (" if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)\n");
printf (" {\n"
printf (" if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)\n"
" {\n"
" register int key = %s (str, len);\n\n",
option.get_hash_name ());