@@ -60,6 +60,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
bug25 tst-printf-round bug23-2 bug23-3 bug23-4 bug26 tst-fmemopen3 \
tst-printf-bz18872 tst-vfprintf-width-prec tst-fmemopen4 \
tst-vfprintf-user-type \
+ tst-vfprintf-mbs-prec \
test-srcs = tst-unbputc tst-printf
new file mode 100644
@@ -0,0 +1,543 @@
+/* Test for wchar_t/multi-byte conversion and precision 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/>. */
+
+#include <locale.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/test-driver.h>
+#include <wchar.h>
+
+#define DYNARRAY_STRUCT str
+#define DYNARRAY_ELEMENT char
+#define DYNARRAY_PREFIX str_
+#include <malloc/dynarray-skeleton.c>
+
+#define DYNARRAY_STRUCT wstr
+#define DYNARRAY_ELEMENT wchar_t
+#define DYNARRAY_PREFIX wstr_
+#include <malloc/dynarray-skeleton.c>
+
+#define DYNARRAY_STRUCT len
+#define DYNARRAY_ELEMENT size_t
+#define DYNARRAY_PREFIX len_
+#include <malloc/dynarray-skeleton.c>
+
+/* This should be larger than the internal buffer in vfprintf. The
+ constant needs to be kept in sync with the format strings in
+ test_mbs_long and test_wide_long. */
+enum { WIDE_STRING_LENGTH = 1000 };
+
+/* Creates two large, random strings used for truncation testing.
+ After the call, *MBS will be encoded in UTF-8, and *WIDE will
+ contain the same string in the internal UCS-32 encoding. Both
+ strings are null-terminated. The array *LENGTH counts the number
+ of multi-byte characters for each prefix string of *WIDE: The first
+ N wide characters of *WIDE correspond the first (*LENGTH)[N] bytes
+ of *MBS. The caller should deallocate all three arrays using
+ free. */
+static void
+make_random_string (char **mbs, wchar_t **wide, size_t **length)
+{
+ struct str str;
+ str_init (&str);
+ struct wstr wstr;
+ wstr_init (&wstr);
+ struct len len;
+ len_init (&len);
+
+ for (int i = 0; i < WIDE_STRING_LENGTH; ++i)
+ {
+ len_add (&len, str_size (&str));
+ /* Cover some multi-byte UTF-8 sequences. Avoid the null
+ character. */
+ uint32_t ch = 1 + (rand () % 521);
+ wstr_add (&wstr, ch);
+
+ /* Limited UTF-8 conversion. */
+ if (ch <= 127)
+ str_add (&str, ch);
+ else
+ {
+ /* We only implement two-byte sequences. */
+ uint32_t first = ch >> 6;
+ TEST_VERIFY (first < 32);
+ str_add (&str, 0xC0 | first);
+ str_add (&str, 0x80 | (ch & 0x3f));
+ }
+ }
+ len_add (&len, str_size (&str));
+ wstr_add (&wstr, L'\0');
+ str_add (&str, '\0');
+
+ *mbs = str_finalize (&str, NULL);
+ TEST_VERIFY_EXIT (*mbs != NULL);
+ *wide = wstr_finalize (&wstr, NULL);
+ TEST_VERIFY_EXIT (*wide != NULL);
+ *length = len_finalize (&len, NULL);
+ TEST_VERIFY_EXIT (*length != NULL);
+}
+
+/* snprintf tests (multi-byte result). */
+static void
+test_mbs_result (void)
+{
+ char buf[200];
+
+ /* ASCII wide string. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%ls", L"xyz") == 3);
+ TEST_VERIFY (strcmp (buf, "xyz") == 0);
+
+ /* Unicode wide string. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%.1ls", L"x\u00DFz") == 1);
+ TEST_VERIFY (strcmp (buf, "x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%.2ls", L"x\u00DFz") == 1);
+ TEST_VERIFY (strcmp (buf, "x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%.3ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 2, right-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%2.1ls", L"x\u00DFz") == 2);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%2.2ls", L"x\u00DFz") == 2);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%2.3ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%2.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%2.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 2, left-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-2.1ls", L"x\u00DFz") == 2);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-2.2ls", L"x\u00DFz") == 2);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-2.3ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-2.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-2.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 3, right-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%3.1ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%3.2ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%3.3ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%3.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%3.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 3, left-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-3.1ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-3.2ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-3.3ls", L"x\u00DFz") == 3);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-3.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-3.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 4, right-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%4.1ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%4.2ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, " x") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%4.3ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, " x\xC3\x9F") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%4.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%4.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+
+ /* Varying precisions with width 4, left-justified. */
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-4.1ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-4.2ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-4.3ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9F ") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-4.4ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+ memset (buf, '@', sizeof (buf));
+ TEST_VERIFY (snprintf (buf, sizeof (buf), "%-4.5ls", L"x\u00DFz") == 4);
+ TEST_VERIFY (strcmp (buf, "x\xC3\x9Fz") == 0);
+}
+
+/* swprintf tests (wide string result). */
+static void
+test_wide_result (void)
+{
+ enum { size = 20 };
+ wchar_t buf[20];
+
+ /* ASCII wide string. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%s", "xyz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"xyz") == 0);
+
+ /* Unicode wide string. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%.1s", "x\xC3\x9Fz") == 1);
+ TEST_VERIFY (wcscmp (buf, L"x") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%.2s", "x\xC3\x9Fz") == 2);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DF") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%.3s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%.4s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions with width 2, right-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%2.1s", "x\xC3\x9Fz") == 2);
+ TEST_VERIFY (wcscmp (buf, L" x") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%2.2s", "x\xC3\x9Fz") == 2);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DF") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%2.3s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%2.4s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions with width 2, left-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-2.1s", "x\xC3\x9Fz") == 2);
+ TEST_VERIFY (wcscmp (buf, L"x ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-2.2s", "x\xC3\x9Fz") == 2);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DF") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-2.3s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-2.4s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions with width 3, right-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%3.1s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L" x") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%3.2s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L" x\u00DF") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%3.3s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%3.4s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions with width 3, left-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-3.1s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-3.2s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DF ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-3.3s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-3.4s", "x\xC3\x9Fz") == 3);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz") == 0);
+
+ /* Varying precisions with width 4, right-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%4.1s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L" x") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%4.2s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L" x\u00DF") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%4.3s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L" x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%4.4s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L" x\u00DFz") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%4.5s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L" x\u00DFz") == 0);
+
+ /* Varying precisions with width 4, left-justified. */
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-4.1s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L"x ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-4.2s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DF ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-4.3s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-4.4s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz ") == 0);
+ wmemset (buf, '@', size);
+ TEST_VERIFY (swprintf (buf, size, L"%-4.5s", "x\xC3\x9Fz") == 4);
+ TEST_VERIFY (wcscmp (buf, L"x\u00DFz ") == 0);
+}
+
+/* Test with long strings and multi-byte result. */
+static void
+test_mbs_long (const char *mbs, const wchar_t *wide, const size_t *length)
+{
+ char buf[4000];
+ _Static_assert (sizeof (buf) > 3 * WIDE_STRING_LENGTH,
+ "buffer size consistent with string length");
+ const char *suffix = "||TERM";
+ TEST_VERIFY_EXIT (sizeof (buf)
+ > length[WIDE_STRING_LENGTH] + strlen (suffix));
+
+ /* Test formatting of the entire string. */
+ {
+ int ret = snprintf (buf, sizeof (buf), "%ls%s", wide, suffix);
+ TEST_VERIFY (ret == length[WIDE_STRING_LENGTH] + strlen (suffix));
+ TEST_VERIFY (memcmp (buf, mbs, length[WIDE_STRING_LENGTH]) == 0);
+ TEST_VERIFY (strcmp (buf + length[WIDE_STRING_LENGTH], suffix) == 0);
+
+ /* Left-justified string, printed in full. */
+ ret = snprintf (buf, sizeof (buf), "%-3500ls%s", wide, suffix);
+ TEST_VERIFY (ret == 3500 + strlen (suffix));
+ TEST_VERIFY (memcmp (buf, mbs, length[WIDE_STRING_LENGTH]) == 0);
+ for (size_t i = length[WIDE_STRING_LENGTH]; i < 3500; ++i)
+ TEST_VERIFY (buf[i] == ' ');
+ TEST_VERIFY (strcmp (buf + 3500, suffix) == 0);
+
+ /* Right-justified string, printed in full. */
+ ret = snprintf (buf, sizeof (buf), "%3500ls%s", wide, suffix);
+ TEST_VERIFY (ret == 3500 + strlen (suffix));
+ size_t padding = 3500 - length[WIDE_STRING_LENGTH];
+ for (size_t i = 0; i < padding; ++i)
+ TEST_VERIFY (buf[i] == ' ');
+ TEST_VERIFY (memcmp (buf + padding, mbs, length[WIDE_STRING_LENGTH]) == 0);
+ TEST_VERIFY (strcmp (buf + 3500, suffix) == 0);
+ }
+
+ size_t wide_characters_converted = 0;
+ for (int mbs_len = 0; mbs_len <= length[WIDE_STRING_LENGTH] + 1;
+ ++mbs_len)
+ {
+ if (wide_characters_converted < WIDE_STRING_LENGTH
+ && mbs_len >= length[wide_characters_converted + 1])
+ /* The requested prefix length contains room for another wide
+ character. */
+ ++wide_characters_converted;
+ if (test_verbose > 0)
+ printf ("info: %s: mbs_len=%d wide_chars_converted=%zu length=%zu\n",
+ __func__, mbs_len, wide_characters_converted,
+ length[wide_characters_converted]);
+ TEST_VERIFY (length[wide_characters_converted] <= mbs_len);
+ TEST_VERIFY (wide_characters_converted == 0
+ || length[wide_characters_converted - 1] < mbs_len);
+
+ int ret = snprintf (buf, sizeof (buf), "%.*ls%s", mbs_len, wide, suffix);
+ TEST_VERIFY (ret == length[wide_characters_converted] + strlen (suffix));
+ TEST_VERIFY (memcmp (buf, mbs, length[wide_characters_converted]) == 0);
+ TEST_VERIFY (strcmp (buf + length[wide_characters_converted],
+ suffix) == 0);
+
+ /* Left-justified string, printed in full. */
+ if (test_verbose)
+ printf ("info: %s: left-justified\n", __func__);
+ ret = snprintf (buf, sizeof (buf), "%-3500.*ls%s",
+ mbs_len, wide, suffix);
+ TEST_VERIFY (ret == 3500 + strlen (suffix));
+ TEST_VERIFY (memcmp (buf, mbs, length[wide_characters_converted]) == 0);
+ for (size_t i = length[wide_characters_converted]; i < 3500; ++i)
+ TEST_VERIFY (buf[i] == ' ');
+ TEST_VERIFY (strcmp (buf + 3500, suffix) == 0);
+
+ /* Right-justified string, printed in full. */
+ if (test_verbose)
+ printf ("info: %s: right-justified\n", __func__);
+ ret = snprintf (buf, sizeof (buf), "%3500.*ls%s", mbs_len, wide, suffix);
+ TEST_VERIFY (ret == 3500 + strlen (suffix));
+ size_t padding = 3500 - length[wide_characters_converted];
+ for (size_t i = 0; i < padding; ++i)
+ TEST_VERIFY (buf[i] == ' ');
+ TEST_VERIFY (memcmp (buf + padding, mbs,
+ length[wide_characters_converted]) == 0);
+ TEST_VERIFY (strcmp (buf + 3500, suffix) == 0);
+ }
+}
+
+/* Test with long strings and wide string result. */
+static void
+test_wide_long (const char *mbs, const wchar_t *wide, const size_t *length)
+{
+ wchar_t buf[2000];
+ _Static_assert (sizeof (buf) > sizeof (wchar_t) * WIDE_STRING_LENGTH,
+ "buffer size consistent with string length");
+ const wchar_t *suffix = L"||TERM";
+ TEST_VERIFY_EXIT (sizeof (buf)
+ > length[WIDE_STRING_LENGTH] + wcslen (suffix));
+
+ /* Test formatting of the entire string. */
+ {
+ int ret = swprintf (buf, sizeof (buf), L"%s%ls", mbs, suffix);
+ TEST_VERIFY (ret == WIDE_STRING_LENGTH + wcslen (suffix));
+ TEST_VERIFY (wmemcmp (buf, wide, WIDE_STRING_LENGTH) == 0);
+ TEST_VERIFY (wcscmp (buf + WIDE_STRING_LENGTH, suffix) == 0);
+
+ /* Left-justified string, printed in full. */
+ ret = swprintf (buf, sizeof (buf), L"%-1500s%ls", mbs, suffix);
+ TEST_VERIFY (ret == 1500 + wcslen (suffix));
+ TEST_VERIFY (wmemcmp (buf, wide, WIDE_STRING_LENGTH) == 0);
+ for (size_t i = WIDE_STRING_LENGTH; i < 1500; ++i)
+ TEST_VERIFY (buf[i] == L' ');
+ TEST_VERIFY (wcscmp (buf + 1500, suffix) == 0);
+
+ /* Right-justified string, printed in full. */
+ ret = swprintf (buf, sizeof (buf), L"%1500s%ls", mbs, suffix);
+ TEST_VERIFY (ret == 1500 + wcslen (suffix));
+ size_t padding = 1500 - WIDE_STRING_LENGTH;
+ for (size_t i = 0; i < padding; ++i)
+ TEST_VERIFY (buf[i] == ' ');
+ TEST_VERIFY (wmemcmp (buf + padding, wide, WIDE_STRING_LENGTH) == 0);
+ TEST_VERIFY (wcscmp (buf + 1500, suffix) == 0);
+ }
+
+ for (int wide_len = 0; wide_len <= WIDE_STRING_LENGTH + 1; ++wide_len)
+ {
+ size_t actual_wide_len;
+ if (wide_len < WIDE_STRING_LENGTH)
+ actual_wide_len = wide_len;
+ else
+ actual_wide_len = WIDE_STRING_LENGTH;
+ if (test_verbose > 0)
+ printf ("info: %s: wide_len=%d actual_wide_len=%zu\n",
+ __func__, wide_len, actual_wide_len);
+
+ int ret = swprintf (buf, sizeof (buf), L"%.*s%ls",
+ wide_len, mbs, suffix);
+ TEST_VERIFY (ret == actual_wide_len + wcslen (suffix));
+ TEST_VERIFY (wmemcmp (buf, wide, actual_wide_len) == 0);
+ TEST_VERIFY (wcscmp (buf + actual_wide_len, suffix) == 0);
+
+ /* Left-justified string, printed in full. */
+ ret = swprintf (buf, sizeof (buf), L"%-1500.*s%ls",
+ wide_len, mbs, suffix);
+ TEST_VERIFY (ret == 1500 + wcslen (suffix));
+ TEST_VERIFY (wmemcmp (buf, wide, actual_wide_len) == 0);
+ for (size_t i = actual_wide_len; i < 1500; ++i)
+ TEST_VERIFY (buf[i] == L' ');
+ TEST_VERIFY (wcscmp (buf + 1500, suffix) == 0);
+
+ /* Right-justified string, printed in full. */
+ ret = swprintf (buf, sizeof (buf), L"%1500.*s%ls",
+ wide_len, mbs, suffix);
+ TEST_VERIFY (ret == 1500 + wcslen (suffix));
+ size_t padding = 1500 - actual_wide_len;
+ for (size_t i = 0; i < padding; ++i)
+ TEST_VERIFY (buf[i] == L' ');
+ TEST_VERIFY (wmemcmp (buf + padding, wide, actual_wide_len) == 0);
+ TEST_VERIFY (wcscmp (buf + 1500, suffix) == 0);
+ }
+}
+
+static int
+do_test (void)
+{
+ /* This test only covers UTF-8 as a multi-byte character set. A
+ locale with a multi-byte character set with shift state would be
+ a relevant test target as well, but glibc currently does not ship
+ such a locale. */
+ TEST_VERIFY (setlocale (LC_CTYPE, "de_DE.UTF-8") != NULL);
+
+ test_mbs_result ();
+ test_wide_result ();
+
+ char *mbs;
+ wchar_t *wide;
+ size_t *length;
+ make_random_string (&mbs, &wide, &length);
+ TEST_VERIFY (strlen (mbs) == length[WIDE_STRING_LENGTH]);
+ if (test_verbose > 0)
+ printf ("info: long multi-byte string contains %zu characters\n",
+ length[WIDE_STRING_LENGTH]);
+ test_mbs_long (mbs, wide, length);
+ test_wide_long (mbs, wide, length);
+ free (mbs);
+ free (wide);
+ free (length);
+
+ return 0;
+}
+
+#include <support/test-driver.c>