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778a55c4a8
* lib/string-buffer.h (sb_appendvf, sb_appendf): Document that errno is set upon failure. * lib/string-buffer-printf.c: Include <errno.h>. (sb_appendvf): Call vsnzprintf instead of vsnprintf. Ensure errno is set upon failure. (sb_appendf): Likewise. * modules/string-buffer (Depends-on): Add vsnzprintf-posix. Remove vsnprintf-posix. * tests/test-string-buffer.c (main): Test error code from sb_appendf.
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/* Test of buffer that accumulates a string by piecewise concatenation.
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Copyright (C) 2021-2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2021. */
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#include <config.h>
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#include "string-buffer.h"
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#include <errno.h>
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#include <string.h>
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#include <wchar.h>
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#include "macros.h"
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static int
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my_appendf (struct string_buffer *buffer, const char *formatstring, ...)
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{
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va_list args;
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va_start (args, formatstring);
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int ret = sb_appendvf (buffer, formatstring, args);
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va_end (args);
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return ret;
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}
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char invalid_format_string_1[] = "%&";
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char invalid_format_string_2[] = "%^";
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int
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main ()
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{
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/* Test simple string concatenation. */
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{
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struct string_buffer buffer;
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sb_init (&buffer);
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char *s = sb_dupfree (&buffer);
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ASSERT (s != NULL && strcmp (s, "") == 0);
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free (s);
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}
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{
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struct string_buffer buffer;
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sb_init (&buffer);
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sb_append (&buffer, "abc");
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sb_append (&buffer, "");
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sb_append (&buffer, "defg");
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char *s = sb_dupfree (&buffer);
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ASSERT (s != NULL && strcmp (s, "abcdefg") == 0);
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free (s);
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}
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/* Test printf-like formatting. */
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{
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struct string_buffer buffer;
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sb_init (&buffer);
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sb_append (&buffer, "<");
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sb_appendf (&buffer, "%x", 3735928559U);
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sb_append (&buffer, ">");
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char *s = sb_dupfree (&buffer);
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ASSERT (s != NULL && strcmp (s, "<deadbeef>") == 0);
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free (s);
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}
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/* Test vprintf-like formatting. */
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{
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struct string_buffer buffer;
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sb_init (&buffer);
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sb_append (&buffer, "<");
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my_appendf (&buffer, "%x", 3735928559U);
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sb_append (&buffer, ">");
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char *s = sb_dupfree (&buffer);
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ASSERT (s != NULL && strcmp (s, "<deadbeef>") == 0);
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free (s);
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}
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/* Test printf-like formatting failure.
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On all systems except AIX, trying to convert the wide-character 0x76543210
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to a multibyte string (in the "C" locale) fails.
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On all systems, invalid format directives make the vsnzprintf() call
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fail. */
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{
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struct string_buffer buffer;
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int ret;
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sb_init (&buffer);
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sb_append (&buffer, "<");
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ret = sb_appendf (&buffer, "%lc", (wint_t) 0x76543210);
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#if !defined _AIX
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ASSERT (ret < 0);
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ASSERT (errno == EILSEQ);
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#endif
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sb_append (&buffer, "|");
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ret = sb_appendf (&buffer, invalid_format_string_1, 1);
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ASSERT (ret < 0);
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ASSERT (errno == EINVAL);
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sb_append (&buffer, "|");
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ret = sb_appendf (&buffer, invalid_format_string_2, 2);
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ASSERT (ret < 0);
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ASSERT (errno == EINVAL);
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sb_append (&buffer, ">");
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char *s = sb_dupfree (&buffer);
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ASSERT (s == NULL);
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}
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return test_exit_status;
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}
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