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b3331e2d53
The conversion loop to the internal encoding does not follow the interface contract that __GCONV_FULL_OUTPUT is only returned after the internal wchar_t buffer has been filled completely. This is enforced by the first of the two asserts in iconv/skeleton.c: /* We must run out of output buffer space in this rerun. */ assert (outbuf == outerr); assert (nstatus == __GCONV_FULL_OUTPUT); This commit solves this issue by queuing a second wide character which cannot be written immediately in the state variable, like other converters already do (e.g., BIG5-HKSCS or TSCII). Reported-by: Tavis Ormandy <taviso@gmail.com>
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* Assertion in ISO-2022-JP-3 due to two-character sequence (bug 27256).
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Copyright (C) 2021 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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<https://www.gnu.org/licenses/>. */
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#include <iconv.h>
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#include <string.h>
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#include <errno.h>
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#include <support/check.h>
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/* Use an escape sequence to return to the initial state. */
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static void
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with_escape_sequence (void)
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{
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iconv_t c = iconv_open ("UTF-8", "ISO-2022-JP-3");
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TEST_VERIFY_EXIT (c != (iconv_t) -1);
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char in[] = "\e$(O+D\e(B";
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char *inbuf = in;
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size_t inleft = strlen (in);
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char out[3]; /* Space for one output character. */
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char *outbuf;
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size_t outleft;
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, &inbuf, &inleft, &outbuf, &outleft), (size_t) -1);
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TEST_COMPARE (errno, E2BIG);
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TEST_COMPARE (inleft, 3);
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TEST_COMPARE (inbuf - in, strlen (in) - 3);
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TEST_COMPARE (outleft, sizeof (out) - 2);
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TEST_COMPARE (outbuf - out, 2);
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TEST_COMPARE (out[0] & 0xff, 0xc3);
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TEST_COMPARE (out[1] & 0xff, 0xa6);
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/* Return to the initial shift state, producing the pending
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character. */
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, &inbuf, &inleft, &outbuf, &outleft), 0);
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TEST_COMPARE (inleft, 0);
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TEST_COMPARE (inbuf - in, strlen (in));
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TEST_COMPARE (outleft, sizeof (out) - 2);
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TEST_COMPARE (outbuf - out, 2);
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TEST_COMPARE (out[0] & 0xff, 0xcc);
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TEST_COMPARE (out[1] & 0xff, 0x80);
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/* Nothing should be flushed the second time. */
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, NULL, 0, &outbuf, &outleft), 0);
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TEST_COMPARE (outleft, sizeof (out));
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TEST_COMPARE (outbuf - out, 0);
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TEST_COMPARE (out[0] & 0xff, 0xcc);
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TEST_COMPARE (out[1] & 0xff, 0x80);
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TEST_COMPARE (iconv_close (c), 0);
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}
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/* Use an explicit flush to return to the initial state. */
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static void
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with_flush (void)
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{
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iconv_t c = iconv_open ("UTF-8", "ISO-2022-JP-3");
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TEST_VERIFY_EXIT (c != (iconv_t) -1);
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char in[] = "\e$(O+D";
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char *inbuf = in;
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size_t inleft = strlen (in);
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char out[3]; /* Space for one output character. */
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char *outbuf;
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size_t outleft;
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, &inbuf, &inleft, &outbuf, &outleft), (size_t) -1);
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TEST_COMPARE (errno, E2BIG);
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TEST_COMPARE (inleft, 0);
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TEST_COMPARE (inbuf - in, strlen (in));
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TEST_COMPARE (outleft, sizeof (out) - 2);
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TEST_COMPARE (outbuf - out, 2);
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TEST_COMPARE (out[0] & 0xff, 0xc3);
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TEST_COMPARE (out[1] & 0xff, 0xa6);
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/* Flush the pending character. */
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, NULL, 0, &outbuf, &outleft), 0);
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TEST_COMPARE (outleft, sizeof (out) - 2);
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TEST_COMPARE (outbuf - out, 2);
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TEST_COMPARE (out[0] & 0xff, 0xcc);
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TEST_COMPARE (out[1] & 0xff, 0x80);
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/* Nothing should be flushed the second time. */
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outbuf = out;
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outleft = sizeof (out);
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TEST_COMPARE (iconv (c, NULL, 0, &outbuf, &outleft), 0);
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TEST_COMPARE (outleft, sizeof (out));
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TEST_COMPARE (outbuf - out, 0);
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TEST_COMPARE (out[0] & 0xff, 0xcc);
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TEST_COMPARE (out[1] & 0xff, 0x80);
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TEST_COMPARE (iconv_close (c), 0);
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}
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static int
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do_test (void)
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{
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with_escape_sequence ();
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with_flush ();
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return 0;
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}
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#include <support/test-driver.c>
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