mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
2b3aa44656
The previous implementation of the TEST_COMPARE macro would fail
to compile code like this:
int ret = res_send (query, sizeof (query), buf, sizeof (buf));
TEST_COMPARE (ret,
sizeof (query)
+ 2 /* Compression reference. */
+ 2 + 2 + 4 + 2 /* Type, class, TTL, RDATA length. */
+ 1 /* Pascal-style string length. */
+ strlen (expected_name));
This resulted in a failed static assertion, "integer conversions
may alter sign of operands". A user of the TEST_COMPARE would have
to add a cast to fix this.
This patch reverts to the original proposed solution of a run-time
check, making TEST_COMPARE usable for comparisons of numbers with
types with different signedness in more contexts.
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/* Basic test for the TEST_COMPARE macro.
|
|
Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/capture_subprocess.h>
|
|
|
|
static void
|
|
subprocess (void *closure)
|
|
{
|
|
char ch = 1;
|
|
/* These tests should fail. */
|
|
TEST_COMPARE (ch, -1); /* Line 28. */
|
|
TEST_COMPARE (2LL, -2LL); /* Line 29. */
|
|
TEST_COMPARE (3LL, (short) -3); /* Line 30. */
|
|
}
|
|
|
|
struct bitfield
|
|
{
|
|
int i2 : 2;
|
|
int i3 : 3;
|
|
unsigned int u2 : 2;
|
|
unsigned int u3 : 3;
|
|
int i31 : 31;
|
|
unsigned int u31 : 31 ;
|
|
long long int i63 : 63;
|
|
unsigned long long int u63 : 63;
|
|
};
|
|
|
|
/* Functions which return signed sizes are common, so test that these
|
|
results can readily checked using TEST_COMPARE. */
|
|
|
|
static int
|
|
return_ssize_t (void)
|
|
{
|
|
return 4;
|
|
}
|
|
|
|
static int
|
|
return_int (void)
|
|
{
|
|
return 4;
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* This should succeed. */
|
|
TEST_COMPARE (1, 1);
|
|
TEST_COMPARE (2LL, 2U);
|
|
{
|
|
char i8 = 3;
|
|
unsigned short u16 = 3;
|
|
TEST_COMPARE (i8, u16);
|
|
}
|
|
TEST_COMPARE (return_ssize_t (), sizeof (char[4]));
|
|
TEST_COMPARE (return_int (), sizeof (char[4]));
|
|
|
|
struct bitfield bitfield = { 0 };
|
|
TEST_COMPARE (bitfield.i2, bitfield.i3);
|
|
TEST_COMPARE (bitfield.u2, bitfield.u3);
|
|
TEST_COMPARE (bitfield.u2, bitfield.i3);
|
|
TEST_COMPARE (bitfield.u3, bitfield.i3);
|
|
TEST_COMPARE (bitfield.i2, bitfield.u3);
|
|
TEST_COMPARE (bitfield.i3, bitfield.u2);
|
|
TEST_COMPARE (bitfield.i63, bitfield.i63);
|
|
TEST_COMPARE (bitfield.u63, bitfield.u63);
|
|
TEST_COMPARE (bitfield.i31, bitfield.i63);
|
|
TEST_COMPARE (bitfield.i63, bitfield.i31);
|
|
|
|
struct support_capture_subprocess proc = support_capture_subprocess
|
|
(&subprocess, NULL);
|
|
|
|
/* Discard the reported error. */
|
|
support_record_failure_reset ();
|
|
|
|
puts ("info: *** subprocess output starts ***");
|
|
fputs (proc.out.buffer, stdout);
|
|
puts ("info: *** subprocess output ends ***");
|
|
|
|
TEST_VERIFY
|
|
(strcmp (proc.out.buffer,
|
|
"tst-test_compare.c:28: numeric comparison failure\n"
|
|
" left: 1 (0x1); from: ch\n"
|
|
" right: -1 (0xffffffff); from: -1\n"
|
|
"tst-test_compare.c:29: numeric comparison failure\n"
|
|
" left: 2 (0x2); from: 2LL\n"
|
|
" right: -2 (0xfffffffffffffffe); from: -2LL\n"
|
|
"tst-test_compare.c:30: numeric comparison failure"
|
|
" (widths 64 and 32)\n"
|
|
" left: 3 (0x3); from: 3LL\n"
|
|
" right: -3 (0xfffffffd); from: (short) -3\n") == 0);
|
|
|
|
/* Check that there is no output on standard error. */
|
|
support_capture_subprocess_check (&proc, "TEST_COMPARE", 0, sc_allow_stdout);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|