Adwaith-Rajesh/gperf
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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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5
ChangeLog
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@@ -1,5 +1,7 @@
2000-08-19 Bruno Haible <bruno@linuix.math.u-bordeaux.fr>
* src/key-list.cc (Key_List::read_keys): Don't accept an empty key.
* src/Makefile.in (install, installdirs, uninstall): Respect
$(DESTDIR).
* doc/Makefile.in (install, installdirs, uninstall): Likewise.
@@ -26,9 +28,6 @@
* tests/Makefile.in (check-lang-syntax): Perform each test with -D
once without and once with duplicates.
* src/key-list.cc (Key_List::output_lookup_function_body): Avoid
outputting a trivially satisfied test for len.
* src/key-list.cc (output_keyword_entry): Avoid outputting a struct
initializer of the form {"key",}.

17
src/key-list.cc
View File

@@ -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 ());