diff options
Diffstat (limited to 'stdio-common')
| -rw-r--r-- | stdio-common/Makefile | 3 | ||||
| -rw-r--r-- | stdio-common/tst-vfprintf-user-type.c | 217 |
2 files changed, 219 insertions, 1 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile index 01a6dd0eda..63c9ebdd81 100644 --- a/stdio-common/Makefile +++ b/stdio-common/Makefile @@ -58,7 +58,8 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \ scanf16 scanf17 tst-setvbuf1 tst-grouping bug23 bug24 \ bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide tst-sprintf3 \ bug25 tst-printf-round bug23-2 bug23-3 bug23-4 bug26 tst-fmemopen3 \ - tst-printf-bz18872 tst-vfprintf-width-prec tst-fmemopen4 + tst-printf-bz18872 tst-vfprintf-width-prec tst-fmemopen4 \ + tst-vfprintf-user-type \ test-srcs = tst-unbputc tst-printf diff --git a/stdio-common/tst-vfprintf-user-type.c b/stdio-common/tst-vfprintf-user-type.c new file mode 100644 index 0000000000..e9596c3080 --- /dev/null +++ b/stdio-common/tst-vfprintf-user-type.c @@ -0,0 +1,217 @@ +/* Test for user-defined types in vfprintf. + Copyright (C) 2017 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/>. */ + +/* 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> + +/* 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 %%%c (prec %d)\n", + __func__, fp, info, args[0], args, 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 %%%c (prec %d)\n", + __func__, info, n, argtypes, size, 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. */ + extern int asprintf_alias (char **, const char *, ...) __asm__ ("asprintf"); + 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> |