1/* Test for a tricky E2BIG situation.
2 Copyright (C) 2002-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <alloca.h>
20#include <errno.h>
21#include <iconv.h>
22#include <stdbool.h>
23#include <stdio.h>
24#include <stdlib.h>
25
26/* In EUC-JISX0213 and TSCII, a single input character can convert to
27 a sequence of two or more Unicode characters. When the output buffer
28 has room for less Unicode characters than would be produced with an
29 unconstrained output buffer, the conversion must give errno = E2BIG. */
30
31void
32test (const char *encoding, char *inbuf, size_t inbufsize, size_t outbufsize)
33{
34 char *outbuf = alloca (outbufsize);
35 iconv_t cd;
36 char *inptr;
37 size_t inlen;
38 char *outptr;
39 size_t outlen;
40 int result;
41 bool empty_input;
42 bool empty_output;
43
44 cd = iconv_open (tocode: "UTF-8", fromcode: encoding);
45 if (cd == (iconv_t) -1)
46 {
47 fprintf (stderr, format: "cannot convert from %s\n", encoding);
48 exit (status: 1);
49 }
50
51 inptr = inbuf;
52 inlen = inbufsize;
53 outptr = outbuf;
54 outlen = outbufsize;
55
56 result = iconv (cd: cd, inbuf: &inptr, inbytesleft: &inlen, outbuf: &outptr, outbytesleft: &outlen);
57 if (!(result == -1 && errno == E2BIG))
58 {
59 fprintf (stderr, format: "%s: wrong iconv result: %d/%d (%m)\n",
60 encoding, result, errno);
61 exit (status: 1);
62 }
63 empty_input = (inptr == inbuf && inlen == inbufsize);
64 empty_output = (outptr == outbuf && outlen == outbufsize);
65
66 if (!empty_input && empty_output)
67 {
68 fprintf (stderr, format: "%s: ate %td input bytes\n", encoding, inptr - inbuf);
69 exit (status: 1);
70 }
71 if (empty_input && !empty_output)
72 {
73 fprintf (stderr, format: "%s: produced %td output bytes\n",
74 encoding, outptr - outbuf);
75 exit (status: 1);
76 }
77
78 iconv_close (cd: cd);
79}
80
81void
82test_euc_jisx0213 (void)
83{
84 char inbuf[2] = { 0xa4, 0xf7 };
85 test (encoding: "EUC-JISX0213", inbuf, inbufsize: sizeof (inbuf), outbufsize: 3);
86}
87
88void
89test_tscii (void)
90{
91 char inbuf[1] = { 0x82 };
92 test (encoding: "TSCII", inbuf, inbufsize: sizeof (inbuf), outbufsize: 3);
93 test (encoding: "TSCII", inbuf, inbufsize: sizeof (inbuf), outbufsize: 6);
94 test (encoding: "TSCII", inbuf, inbufsize: sizeof (inbuf), outbufsize: 9);
95}
96
97static int
98do_test (void)
99{
100 test_euc_jisx0213 ();
101 test_tscii ();
102 return 0;
103}
104
105#define TEST_FUNCTION do_test ()
106#include "../test-skeleton.c"
107

source code of glibc/iconvdata/tst-e2big.c