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/* Test for user-defined types in vfprintf.
Copyright (C) 2017-2022 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
<https://www.gnu.org/licenses/>. */
/* This test contains a printf format specifier, %P, with a custom
type which is a long/double pair. If a precision is specified,
this indicates the number of such pairs which constitute the
argument. */
#include <locale.h>
#include <printf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/support.h>
#include <support/test-driver.h>
#include <wchar.h>
/* Initialized by do_test using register_printf_type. */
static int user_type;
struct two_argument
{
long i;
double d;
};
static void
my_va_arg_function (void *mem, va_list *ap)
{
if (test_verbose > 0)
printf ("info: %s (%p) called\n", __func__, mem);
struct two_argument *pair = mem;
pair->i = va_arg (*ap, long);
pair->d = va_arg (*ap, double);
}
static int
my_printf_function (FILE *fp, const struct printf_info *info,
const void *const *args)
{
if (test_verbose > 0)
printf ("info: %s (%p, %p, {%p}@%p) called for %%%lc (prec %d)\n",
__func__, fp, info, args[0], args, (wint_t) info->spec,
info->prec);
TEST_VERIFY (info->spec == 'P');
size_t nargs;
int printed;
if (info->prec >= 0)
{
if (fputc ('{', fp) < 0)
return -1;
nargs = info->prec;
printed = 1;
}
else
{
nargs = 1;
printed = 0;
}
for (size_t i = 0; i < nargs; ++i)
{
if (i != 0)
{
if (fputc (',', fp) < 0)
return -1;
++printed;
}
/* NB: Triple pointer indirection. ARGS is an array of void *,
and those pointers point to a pointer to the memory area
supplied to my_va_arg_function. */
struct two_argument *pair = *(void **) args[i];
int ret = fprintf (fp, "(%ld, %f)", pair->i, pair->d);
if (ret < 0)
return -1;
printed += ret;
}
if (info->prec >= 0)
{
if (fputc ('}', fp) < 0)
return -1;
++printed;
}
return printed;
}
static int
my_arginfo_function (const struct printf_info *info,
size_t n, int *argtypes, int *size)
{
/* Avoid recursion. */
if (info->spec != 'P')
return -1;
if (test_verbose > 0)
printf ("info: %s (%p, %zu, %p, %p) called for %%%lc (prec %d)\n",
__func__, info, n, argtypes, size, (wint_t) info->spec,
info->prec);
TEST_VERIFY_EXIT (n >= 1);
size_t nargs;
if (info->prec >= 0)
nargs = info->prec;
else
nargs = 1;
size_t to_fill = nargs;
if (to_fill > n)
to_fill = n;
for (size_t i = 0; i < to_fill; ++i)
{
argtypes[i] = user_type;
size[i] = sizeof (struct two_argument);
}
if (test_verbose > 0)
printf ("info: %s return value: %zu\n", __func__, nargs);
return nargs;
}
static int
do_test (void)
{
user_type = register_printf_type (my_va_arg_function);
if (test_verbose > 0)
printf ("info: allocated user type: %d\n", user_type);
TEST_VERIFY_EXIT (user_type >= PA_LAST);
TEST_VERIFY_EXIT (register_printf_specifier
('P', my_printf_function, my_arginfo_function) >= 0);
/* Alias declaration for asprintf, to avoid the format string
attribute and the associated warning. */
#if __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
extern int asprintf_alias (char **, const char *, ...) __asm__ ("__asprintfieee128");
#else
extern int asprintf_alias (char **, const char *, ...) __asm__ ("asprintf");
#endif
TEST_VERIFY (asprintf_alias == asprintf);
char *str = NULL;
TEST_VERIFY (asprintf_alias (&str, "[[%P]]", 123L, 456.0) >= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str, "[[(123, 456.000000)]]") == 0);
free (str);
str = NULL;
TEST_VERIFY (asprintf_alias (&str, "[[%1$P %1$P]]", 123L, 457.0) >= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str, "[[(123, 457.000000) (123, 457.000000)]]") == 0);
free (str);
str = NULL;
TEST_VERIFY (asprintf_alias (&str, "[[%.1P]]", 1L, 2.0) >= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str, "[[{(1, 2.000000)}]]") == 0);
free (str);
str = NULL;
TEST_VERIFY (asprintf_alias (&str, "[[%.2P]]", 1L, 2.0, 3L, 4.0) >= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str, "[[{(1, 2.000000),(3, 4.000000)}]]") == 0);
free (str);
str = NULL;
TEST_VERIFY (asprintf_alias
(&str, "[[%.2P | %.3P]]",
/* argument 1: */ 1L, 2.0, 3L, 4.0,
/* argument 2: */ 5L, 6.0, 7L, 8.0, 9L, 10.0)
>= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str,
"[["
"{(1, 2.000000),(3, 4.000000)}"
" | "
"{(5, 6.000000),(7, 8.000000),(9, 10.000000)}"
"]]") == 0);
free (str);
/* The following subtest fails due to bug 21534. */
#if 0
str = NULL;
TEST_VERIFY (asprintf_alias
(&str, "[[%1$.2P | %2$.3P | %1$.2P]]",
/* argument 1: */ 1L, 2.0, 3L, 4.0,
/* argument 2: */ 5L, 6.0, 7L, 8.0, 9L, 10.0)
>= 0);
if (test_verbose > 0)
printf ("info: %s\n", str);
TEST_VERIFY (strcmp (str,
"[["
"{(1, 2.000000),(3, 4.000000)}"
" | "
"{(5, 6.000000),(7, 8.000000),(9, 10.000000)}"
" | "
"{(1, 2.000000),(3, 4.000000)}"
"]]") == 0);
free (str);
#endif
return 0;
}
#include <support/test-driver.c>
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