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d0a7415979
The c16rtomb implementation has: // XXX The ISO C 11 spec I have does not say anything about handling // XXX surrogates in this interface. The DR#488 resolution, as applied to C2X, requires surrogate pairs to be handled here (so the first call returns 0 and stores the high surrogate in the mbstate_t, while the second call combines the surrogates, produces a multibyte character and returns the number of bytes written). This patch implements that. (mbrtoc16 already handled producing surrogates as output.) Tested for x86_64. [BZ #23794] * wcsmbs/c16rtomb.c (c16rtomb): Save first character of surrogate pair and return 0 in that case, and use saved character to interpret following character. * wcsmbs/tst-c16-surrogate.c: New file. * wcsmbs/Makefile (tests): Add tst-c16-surrogate.c. [$(run-built-tests) = yes] ($(objpfx)tst-c16-surrogate.out): Depend on $(gen-locales)
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* Test c16rtomb handling of surrogate pairs (DR#488, bug 23794).
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <locale.h>
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#include <stdio.h>
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#include <string.h>
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#include <uchar.h>
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#include <wchar.h>
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#include <array_length.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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TEST_VERIFY_EXIT (setlocale (LC_ALL, "de_DE.UTF-8") != NULL);
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/* Test conversions of surrogate pairs. */
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for (char32_t c = 0x10000; c <= 0x10ffff; c += 0x123)
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{
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char32_t c_pos = c - 0x10000;
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char16_t c_hi = (c_pos >> 10) + 0xd800;
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char16_t c_lo = (c_pos & 0x3ff) + 0xdc00;
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printf ("testing U+0x%08x (0x%x 0x%x)\n",
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(unsigned int) c, (unsigned int) c_hi, (unsigned int) c_lo);
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char buf[16] = { 0 };
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size_t ret_hi = c16rtomb (buf, c_hi, NULL);
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TEST_COMPARE (ret_hi, 0);
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size_t ret_lo = c16rtomb (buf, c_lo, NULL);
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TEST_COMPARE (ret_lo, 4);
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wchar_t wc = 0;
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size_t ret_wc = mbrtowc (&wc, buf, 4, NULL);
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TEST_COMPARE (ret_wc, 4);
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TEST_COMPARE (wc, (wchar_t) c);
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}
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/* Test errors for invalid conversions. */
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static const char16_t err_cases[][2] =
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{
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/* High surrogate followed by non-surrogate. */
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{ 0xd800, 0x1 },
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/* High surrogate followed by another high surrogate. */
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{ 0xd800, 0xd800 },
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/* Low surrogate not following high surrogate. */
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{ 0xdc00, 0 }
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};
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for (size_t i = 0; i < array_length (err_cases); i++)
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{
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char16_t c_hi = err_cases[i][0];
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char16_t c_lo = err_cases[i][1];
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printf ("testing error case: 0x%x 0x%x\n", (unsigned int) c_hi,
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(unsigned int) c_lo);
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c16rtomb (NULL, 0, NULL);
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char buf[16] = { 0 };
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errno = 0;
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size_t ret_hi = c16rtomb (buf, c_hi, NULL);
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if (c_lo == 0)
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{
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/* Unmatched low surrogate in first place. */
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TEST_COMPARE (ret_hi, (size_t) -1);
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TEST_COMPARE (errno, EILSEQ);
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}
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else
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{
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/* High surrogate; error in second place. */
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TEST_COMPARE (ret_hi, 0);
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errno = 0;
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size_t ret_lo = c16rtomb (buf, c_lo, NULL);
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TEST_COMPARE (ret_lo, (size_t) -1);
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TEST_COMPARE (errno, EILSEQ);
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}
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}
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return 0;
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}
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#include <support/test-driver.c>
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