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300 lines
6.9 KiB
C
300 lines
6.9 KiB
C
/* Copyright (C) 2000-2023 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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/* Create a table from CHARSET to Unicode.
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This is a good test for CHARSET's iconv() module, in particular the
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FROM_LOOP BODY macro. */
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <iconv.h>
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#include <errno.h>
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/* If nonzero, ignore conversions outside Unicode plane 0. */
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static int bmp_only;
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/* Converts a byte buffer to a hexadecimal string. */
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static const char*
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hexbuf (unsigned char buf[], unsigned int buflen)
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{
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static char msg[50];
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switch (buflen)
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{
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case 1:
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sprintf (msg, "0x%02X", buf[0]);
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break;
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case 2:
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sprintf (msg, "0x%02X%02X", buf[0], buf[1]);
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break;
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case 3:
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sprintf (msg, "0x%02X%02X%02X", buf[0], buf[1], buf[2]);
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break;
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case 4:
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sprintf (msg, "0x%02X%02X%02X%02X", buf[0], buf[1], buf[2], buf[3]);
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break;
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default:
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abort ();
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}
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return msg;
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}
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/* Attempts to convert a byte buffer BUF (BUFLEN bytes) to OUT (12 bytes)
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using the conversion descriptor CD. Returns the number of written bytes,
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or 0 if ambiguous, or -1 if invalid. */
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static int
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try (iconv_t cd, unsigned char buf[], unsigned int buflen, unsigned char *out)
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{
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const char *inbuf = (const char *) buf;
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size_t inbytesleft = buflen;
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char *outbuf = (char *) out;
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size_t outbytesleft = 12;
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size_t result;
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iconv (cd, NULL, NULL, NULL, NULL);
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result = iconv (cd, (char **) &inbuf, &inbytesleft, &outbuf, &outbytesleft);
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if (result != (size_t)(-1))
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result = iconv (cd, NULL, NULL, &outbuf, &outbytesleft);
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if (result == (size_t)(-1))
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{
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if (errno == EILSEQ)
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{
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return -1;
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}
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else if (errno == EINVAL)
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{
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return 0;
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}
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else
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{
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int saved_errno = errno;
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fprintf (stderr, "%s: iconv error: ", hexbuf (buf, buflen));
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errno = saved_errno;
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perror ("");
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exit (1);
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}
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}
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else
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{
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if (inbytesleft != 0)
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{
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fprintf (stderr, "%s: inbytes = %ld, outbytes = %ld\n",
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hexbuf (buf, buflen),
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(long) (buflen - inbytesleft),
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(long) (12 - outbytesleft));
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exit (1);
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}
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return 12 - outbytesleft;
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}
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}
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/* Returns the out[] buffer as a Unicode value, formatted as 0x%04X. */
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static const char *
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utf8_decode (const unsigned char *out, unsigned int outlen)
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{
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static char hexbuf[84];
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char *p = hexbuf;
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while (outlen > 0)
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{
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if (p > hexbuf)
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*p++ = ' ';
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if (out[0] < 0x80)
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{
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sprintf (p, "0x%04X", out[0]);
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out += 1; outlen -= 1;
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}
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else if (out[0] >= 0xc0 && out[0] < 0xe0 && outlen >= 2)
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{
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sprintf (p, "0x%04X", ((out[0] & 0x1f) << 6) + (out[1] & 0x3f));
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out += 2; outlen -= 2;
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}
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else if (out[0] >= 0xe0 && out[0] < 0xf0 && outlen >= 3)
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{
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sprintf (p, "0x%04X", ((out[0] & 0x0f) << 12)
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+ ((out[1] & 0x3f) << 6) + (out[2] & 0x3f));
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out += 3; outlen -= 3;
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}
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else if (out[0] >= 0xf0 && out[0] < 0xf8 && outlen >= 4)
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{
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sprintf (p, "0x%04X", ((out[0] & 0x07) << 18)
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+ ((out[1] & 0x3f) << 12)
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+ ((out[2] & 0x3f) << 6) + (out[3] & 0x3f));
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out += 4; outlen -= 4;
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}
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else if (out[0] >= 0xf8 && out[0] < 0xfc && outlen >= 5)
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{
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sprintf (p, "0x%04X", ((out[0] & 0x03) << 24)
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+ ((out[1] & 0x3f) << 18)
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+ ((out[2] & 0x3f) << 12)
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+ ((out[3] & 0x3f) << 6) + (out[4] & 0x3f));
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out += 5; outlen -= 5;
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}
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else if (out[0] >= 0xfc && out[0] < 0xfe && outlen >= 6)
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{
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sprintf (p, "0x%04X", ((out[0] & 0x01) << 30)
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+ ((out[1] & 0x3f) << 24)
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+ ((out[2] & 0x3f) << 18)
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+ ((out[3] & 0x3f) << 12)
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+ ((out[4] & 0x3f) << 6) + (out[5] & 0x3f));
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out += 6; outlen -= 6;
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}
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else
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{
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sprintf (p, "0x????");
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out += 1; outlen -= 1;
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}
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if (bmp_only && strlen (p) > 6)
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/* Ignore conversions outside Unicode plane 0. */
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return NULL;
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p += strlen (p);
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}
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return hexbuf;
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}
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int
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main (int argc, char *argv[])
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{
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const char *charset;
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iconv_t cd;
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int search_depth;
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if (argc != 2)
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{
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fprintf (stderr, "Usage: tst-table-from charset\n");
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exit (1);
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}
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charset = argv[1];
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cd = iconv_open ("UTF-8", charset);
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if (cd == (iconv_t)(-1))
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{
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perror ("iconv_open");
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exit (1);
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}
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/* When testing UTF-8 or GB18030, stop at 0x10000, otherwise the output
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file gets too big. */
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bmp_only = (strcmp (charset, "UTF-8") == 0
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|| strcmp (charset, "GB18030") == 0);
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search_depth = (strcmp (charset, "UTF-8") == 0 ? 3 : 4);
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{
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unsigned char out[12];
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unsigned char buf[4];
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unsigned int i0, i1, i2, i3;
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int result;
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for (i0 = 0; i0 < 0x100; i0++)
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{
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buf[0] = i0;
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result = try (cd, buf, 1, out);
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if (result < 0)
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{
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}
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else if (result > 0)
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{
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const char *unicode = utf8_decode (out, result);
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if (unicode != NULL)
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printf ("0x%02X\t%s\n", i0, unicode);
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}
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else
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{
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for (i1 = 0; i1 < 0x100; i1++)
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{
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buf[1] = i1;
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result = try (cd, buf, 2, out);
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if (result < 0)
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{
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}
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else if (result > 0)
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{
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const char *unicode = utf8_decode (out, result);
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if (unicode != NULL)
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printf ("0x%02X%02X\t%s\n", i0, i1, unicode);
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}
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else
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{
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for (i2 = 0; i2 < 0x100; i2++)
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{
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buf[2] = i2;
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result = try (cd, buf, 3, out);
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if (result < 0)
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{
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}
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else if (result > 0)
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{
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const char *unicode = utf8_decode (out, result);
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if (unicode != NULL)
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printf ("0x%02X%02X%02X\t%s\n",
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i0, i1, i2, unicode);
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}
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else if (search_depth > 3)
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{
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for (i3 = 0; i3 < 0x100; i3++)
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{
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buf[3] = i3;
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result = try (cd, buf, 4, out);
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if (result < 0)
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{
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}
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else if (result > 0)
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{
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const char *unicode =
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utf8_decode (out, result);
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if (unicode != NULL)
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printf ("0x%02X%02X%02X%02X\t%s\n",
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i0, i1, i2, i3, unicode);
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}
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else
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{
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fprintf (stderr,
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"%s: incomplete byte sequence\n",
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hexbuf (buf, 4));
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exit (1);
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}
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}
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}
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}
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}
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}
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}
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}
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}
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if (iconv_close (cd) < 0)
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{
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perror ("iconv_close");
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exit (1);
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}
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if (ferror (stdin) || fflush (stdout) || ferror (stdout))
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{
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fprintf (stderr, "I/O error\n");
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exit (1);
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}
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return 0;
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}
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