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If option -l is given, use memcmp for the comparison.

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Bruno Haible
2000-08-19 19:20:04 +00:00
parent 03a6a86a99
commit 43527c2cbc
2 changed files with 40 additions and 3 deletions
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4
ChangeLog
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@@ -1,5 +1,9 @@
2000-08-19 Bruno Haible <bruno@linuix.math.u-bordeaux.fr> 2000-08-19 Bruno Haible <bruno@linuix.math.u-bordeaux.fr>
* src/key-list.cc (Output_Compare_Memcmp): New class.
(Key_List::output_lookup_function): When option -l is given, use
memcmp instead of strcmp or strncmp.
* doc/gperf.texi: The bug report address is <bug-gnu-utils@gnu.org>. * doc/gperf.texi: The bug report address is <bug-gnu-utils@gnu.org>.
The download address is ftp.gnu.org. Remove mention of -a and -g The download address is ftp.gnu.org. Remove mention of -a and -g
options (now nops). Explain effect of -c option. options (now nops). Explain effect of -c option.

39
src/key-list.cc
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@@ -810,6 +810,34 @@ void Output_Compare_Strncmp::output_comparison (const Output_Expr& expr1,
printf ("[len] == '\\0'"); printf ("[len] == '\\0'");
} }
/* This class outputs a comparison using memcmp.
Note that the length of expr1 (available through the local variable `len')
must be verified to be equal to the length of expr2 prior to this
comparison. */
struct Output_Compare_Memcmp : public Output_Compare
{
virtual void output_comparison (const Output_Expr& expr1,
const Output_Expr& expr2) const;
Output_Compare_Memcmp () {}
virtual ~Output_Compare_Memcmp () {}
};
void Output_Compare_Memcmp::output_comparison (const Output_Expr& expr1,
const Output_Expr& expr2) const
{
T (Trace t ("Output_Compare_Memcmp::output_comparison");)
printf ("*");
expr1.output_expr ();
printf (" == *");
expr2.output_expr ();
printf (" && !memcmp (");
expr1.output_expr ();
printf (" + 1, ");
expr2.output_expr ();
printf (" + 1, len - 1)");
}
/* ------------------------------------------------------------------------- */ /* ------------------------------------------------------------------------- */
/* Generates C code for the hash function that returns the /* Generates C code for the hash function that returns the
@@ -1820,10 +1848,15 @@ Key_List::output_lookup_function (void)
if (!option[GLOBAL]) if (!option[GLOBAL])
output_lookup_tables (); output_lookup_tables ();
if (option[COMP]) if (option[LENTABLE])
output_lookup_function_body (Output_Compare_Strncmp ()); output_lookup_function_body (Output_Compare_Memcmp ());
else else
output_lookup_function_body (Output_Compare_Strcmp ()); {
if (option[COMP])
output_lookup_function_body (Output_Compare_Strncmp ());
else
output_lookup_function_body (Output_Compare_Strcmp ());
}
printf ("}\n"); printf ("}\n");
} }