The commit included in this patch only incidentally fixes the problem
reported in bug 1427734: In each of the IBM9xx character sets referenced in
this patch, the removal of the "break" statement means that the subsequent
increment of "inptr" is executed instead of being skipped. This allows
conversion to progress instead of hanging.
commit 692de4b3960dc90bdcfb871513ee4d81d314cf69
Author: Martin Sebor <msebor@redhat.com>
Date: Fri Jan 15 11:25:13 2016 -0700
Have iconv accept redundant escape sequences in IBM900, IBM903, IBM905,
IBM907, and IBM909.
Patch for bug #17197 changes the encoder to avoid generating redundant
shift sequences. However, those sequences may already be present in
data encododed by prior versions of the encoder. This change modifies
the decoder to also avoid rejecting redundant shift sequences.
[BZ #19432]
* iconvdata/Makefile: Add bug-iconv11.
* iconvdata/bug-iconv11.c: New test.
* iconvdata/ibm930.c: Do not reject redundant shift sequences.
* iconvdata/ibm933.c: Same.
* iconvdata/ibm935.c: Same.
* iconvdata/ibm937.c: Same.
* iconvdata/ibm939.c: Same.
# Conflicts:
# iconvdata/Makefile
diff --git a/iconvdata/Makefile b/iconvdata/Makefile
index 0ec67554ca4c29ea..c4e6c510d7abc055 100644
--- a/iconvdata/Makefile
+++ b/iconvdata/Makefile
@@ -68,7 +68,7 @@ include ../Makeconfig
ifeq (yes,$(build-shared))
tests = bug-iconv1 bug-iconv2 tst-loading tst-e2big tst-iconv4 bug-iconv4 \
tst-iconv6 bug-iconv5 bug-iconv6 tst-iconv7 bug-iconv8 bug-iconv9 \
- bug-iconv10 bug-iconv12
+ bug-iconv10 bug-iconv11 bug-iconv12
ifeq ($(have-thread-library),yes)
tests += bug-iconv3
endif
diff --git a/iconvdata/bug-iconv11.c b/iconvdata/bug-iconv11.c
new file mode 100644
index 0000000000000000..6cdc07d79883454d
--- /dev/null
+++ b/iconvdata/bug-iconv11.c
@@ -0,0 +1,114 @@
+/* bug 19432: iconv rejects redundant escape sequences in IBM903,
+ IBM905, IBM907, and IBM909
+
+ Copyright (C) 2016 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 <iconv.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+// The longest test input sequence.
+#define MAXINBYTES 8
+#define MAXOUTBYTES (MAXINBYTES * MB_LEN_MAX)
+
+/* Verify that a conversion of the INPUT sequence consisting of
+ INBYTESLEFT bytes in the encoding specified by the codeset
+ named by FROM_SET is successful.
+ Return 0 on success, non-zero on iconv() failure. */
+
+static int
+test_ibm93x (const char *from_set, const char *input, size_t inbytesleft)
+{
+ const char to_set[] = "UTF-8";
+ iconv_t cd = iconv_open (to_set, from_set);
+ if (cd == (iconv_t) -1)
+ {
+ printf ("iconv_open(\"%s\", \"%s\"): %s\n",
+ from_set, to_set, strerror (errno));
+ return 1;
+ }
+
+ char output [MAXOUTBYTES];
+ size_t outbytesleft = sizeof output;
+
+ char *inbuf = (char*)input;
+ char *outbuf = output;
+
+ printf ("iconv(cd, %p, %zu, %p, %zu)\n",
+ inbuf, inbytesleft, outbuf, outbytesleft);
+
+ errno = 0;
+ size_t ret = iconv (cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
+ printf (" ==> %td: %s\n"
+ " inbuf%+td, inbytesleft=%zu, outbuf%+td, outbytesleft=%zu\n",
+ ret, strerror (errno),
+ inbuf - input, inbytesleft, outbuf - output, outbytesleft);
+
+ // Return 0 on success, non-zero on iconv() failure.
+ return ret == (size_t)-1 || errno;
+}
+
+static int
+do_test (void)
+{
+ // State-dependent encodings to exercise.
+ static const char* const to_code[] = {
+ "IBM930", "IBM933", "IBM935", "IBM937", "IBM939"
+ };
+
+ static const size_t ncodesets = sizeof to_code / sizeof *to_code;
+
+ static const struct {
+ char txt[MAXINBYTES];
+ size_t len;
+ } input[] = {
+#define DATA(s) { s, sizeof s - 1 }
+ /* <SI>: denotes the shift-in 1-byte escape sequence, changing
+ the encoder from a sigle-byte encoding to multibyte
+ <SO>: denotes the shift-out 1-byte escape sequence, switching
+ the encoder from a multibyte to a single-byte state */
+
+ DATA ("\x0e"), // <SI> (not redundant)
+ DATA ("\x0f"), // <S0> (redundant with initial state)
+ DATA ("\x0e\x0e"), // <SI><SI>
+ DATA ("\x0e\x0f\x0f"), // <SI><SO><SO>
+ DATA ("\x0f\x0f"), // <SO><SO>
+ DATA ("\x0f\x0e\x0e"), // <SO><SI><SI>
+ DATA ("\x0e\x0f\xc7\x0f"), // <SI><SO><G><SO>
+ DATA ("\xc7\x0f") // <G><SO> (redundant with initial state)
+ };
+
+ static const size_t ninputs = sizeof input / sizeof *input;
+
+ int ret = 0;
+
+ size_t i, j;
+
+ /* Iterate over the IBM93x codesets above and exercise each with
+ the input sequences above. */
+ for (i = 0; i != ncodesets; ++i)
+ for (j = 0; j != ninputs; ++j)
+ ret += test_ibm93x (to_code [i], input [i].txt, input [i].len);
+
+ return ret;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/iconvdata/ibm930.c b/iconvdata/ibm930.c
index 636141114f506985..88413ccfbabfdc35 100644
--- a/iconvdata/ibm930.c
+++ b/iconvdata/ibm930.c
@@ -105,24 +105,14 @@ enum
\
if (__builtin_expect (ch, 0) == SO) \
{ \
- /* Shift OUT, change to DBCS converter. */ \
- if (curcs == db) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- /* Shift IN, change to SBCS converter */ \
- if (curcs == sb) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \
diff --git a/iconvdata/ibm933.c b/iconvdata/ibm933.c
index 8b9e5780a36a454a..335d385551fee86e 100644
--- a/iconvdata/ibm933.c
+++ b/iconvdata/ibm933.c
@@ -104,24 +104,14 @@ enum
\
if (__builtin_expect (ch, 0) == SO) \
{ \
- /* Shift OUT, change to DBCS converter. */ \
- if (curcs == db) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- /* Shift IN, change to SBCS converter. */ \
- if (curcs == sb) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \
diff --git a/iconvdata/ibm935.c b/iconvdata/ibm935.c
index 4e2d99ab56d7f0d2..520d28a4e9a690fc 100644
--- a/iconvdata/ibm935.c
+++ b/iconvdata/ibm935.c
@@ -104,24 +104,14 @@ enum
\
if (__builtin_expect(ch, 0) == SO) \
{ \
- /* Shift OUT, change to DBCS converter. */ \
- if (curcs == db) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- /* Shift IN, change to SBCS converter. */ \
- if (curcs == sb) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \
diff --git a/iconvdata/ibm937.c b/iconvdata/ibm937.c
index 1e468871b783e78d..64563bb8bf0441ff 100644
--- a/iconvdata/ibm937.c
+++ b/iconvdata/ibm937.c
@@ -104,24 +104,14 @@ enum
\
if (__builtin_expect (ch, 0) == SO) \
{ \
- /* Shift OUT, change to DBCS converter. */ \
- if (curcs == db) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- /* Shift IN, change to SBCS converter. */ \
- if (curcs == sb) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \
diff --git a/iconvdata/ibm939.c b/iconvdata/ibm939.c
index 2060b0c329df0c86..4f73e2e55c94972d 100644
--- a/iconvdata/ibm939.c
+++ b/iconvdata/ibm939.c
@@ -104,24 +104,14 @@ enum
\
if (__builtin_expect (ch, 0) == SO) \
{ \
- /* Shift OUT, change to DBCS converter. */ \
- if (curcs == db) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- /* Shift IN, change to SBCS converter. */ \
- if (curcs == sb) \
- { \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
- } \
+ /* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \