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-rw-r--r--jnlib/utf8conv.c448
1 files changed, 448 insertions, 0 deletions
diff --git a/jnlib/utf8conv.c b/jnlib/utf8conv.c
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--- /dev/null
+++ b/jnlib/utf8conv.c
@@ -0,0 +1,448 @@
+/* utf8conf.c - UTF8 character set conversion
+ * Copyright (C) 1994, 1998, 1999, 2000, 2001,
+ * 2003 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#ifdef HAVE_LANGINFO_CODESET
+#include <langinfo.h>
+#endif
+
+#include "libjnlib-config.h"
+#include "stringhelp.h"
+#include "utf8conv.h"
+
+
+static ushort koi8_unicode[128] = {
+ 0x2500, 0x2502, 0x250c, 0x2510, 0x2514, 0x2518, 0x251c, 0x2524,
+ 0x252c, 0x2534, 0x253c, 0x2580, 0x2584, 0x2588, 0x258c, 0x2590,
+ 0x2591, 0x2592, 0x2593, 0x2320, 0x25a0, 0x2219, 0x221a, 0x2248,
+ 0x2264, 0x2265, 0x00a0, 0x2321, 0x00b0, 0x00b2, 0x00b7, 0x00f7,
+ 0x2550, 0x2551, 0x2552, 0x0451, 0x2553, 0x2554, 0x2555, 0x2556,
+ 0x2557, 0x2558, 0x2559, 0x255a, 0x255b, 0x255c, 0x255d, 0x255e,
+ 0x255f, 0x2560, 0x2561, 0x0401, 0x2562, 0x2563, 0x2564, 0x2565,
+ 0x2566, 0x2567, 0x2568, 0x2569, 0x256a, 0x256b, 0x256c, 0x00a9,
+ 0x044e, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433,
+ 0x0445, 0x0438, 0x0439, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e,
+ 0x043f, 0x044f, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432,
+ 0x044c, 0x044b, 0x0437, 0x0448, 0x044d, 0x0449, 0x0447, 0x044a,
+ 0x042e, 0x0410, 0x0411, 0x0426, 0x0414, 0x0415, 0x0424, 0x0413,
+ 0x0425, 0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e,
+ 0x041f, 0x042f, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412,
+ 0x042c, 0x042b, 0x0417, 0x0428, 0x042d, 0x0429, 0x0427, 0x042a
+};
+
+static ushort latin2_unicode[128] = {
+ 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
+ 0x0088, 0x0089, 0x008A, 0x008B, 0x008C, 0x008D, 0x008E, 0x008F,
+ 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+ 0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
+ 0x00A0, 0x0104, 0x02D8, 0x0141, 0x00A4, 0x013D, 0x015A, 0x00A7,
+ 0x00A8, 0x0160, 0x015E, 0x0164, 0x0179, 0x00AD, 0x017D, 0x017B,
+ 0x00B0, 0x0105, 0x02DB, 0x0142, 0x00B4, 0x013E, 0x015B, 0x02C7,
+ 0x00B8, 0x0161, 0x015F, 0x0165, 0x017A, 0x02DD, 0x017E, 0x017C,
+ 0x0154, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x0139, 0x0106, 0x00C7,
+ 0x010C, 0x00C9, 0x0118, 0x00CB, 0x011A, 0x00CD, 0x00CE, 0x010E,
+ 0x0110, 0x0143, 0x0147, 0x00D3, 0x00D4, 0x0150, 0x00D6, 0x00D7,
+ 0x0158, 0x016E, 0x00DA, 0x0170, 0x00DC, 0x00DD, 0x0162, 0x00DF,
+ 0x0155, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x013A, 0x0107, 0x00E7,
+ 0x010D, 0x00E9, 0x0119, 0x00EB, 0x011B, 0x00ED, 0x00EE, 0x010F,
+ 0x0111, 0x0144, 0x0148, 0x00F3, 0x00F4, 0x0151, 0x00F6, 0x00F7,
+ 0x0159, 0x016F, 0x00FA, 0x0171, 0x00FC, 0x00FD, 0x0163, 0x02D9
+};
+
+
+static const char *active_charset_name = "iso-8859-1";
+static ushort *active_charset = NULL;
+static int no_translation = 0;
+
+int
+set_native_charset (const char *newset)
+{
+ if (!newset)
+#ifdef HAVE_LANGINFO_CODESET
+ newset = nl_langinfo (CODESET);
+#else
+ newset = "8859-1";
+#endif
+
+ if (strlen (newset) > 3 && !ascii_memcasecmp (newset, "iso", 3))
+ {
+ newset += 3;
+ if (*newset == '-' || *newset == '_')
+ newset++;
+ }
+
+ if (!*newset
+ || !ascii_strcasecmp (newset, "8859-1")
+ || !ascii_strcasecmp (newset, "8859-15"))
+ {
+ active_charset_name = "iso-8859-1";
+ no_translation = 0;
+ active_charset = NULL;
+ }
+ else if (!ascii_strcasecmp (newset, "8859-2"))
+ {
+ active_charset_name = "iso-8859-2";
+ no_translation = 0;
+ active_charset = latin2_unicode;
+ }
+ else if (!ascii_strcasecmp (newset, "koi8-r"))
+ {
+ active_charset_name = "koi8-r";
+ no_translation = 0;
+ active_charset = koi8_unicode;
+ }
+ else if (!ascii_strcasecmp (newset, "utf8")
+ || !ascii_strcasecmp (newset, "utf-8"))
+ {
+ active_charset_name = "utf-8";
+ no_translation = 1;
+ active_charset = NULL;
+ }
+ else
+ return -1;
+ return 0;
+}
+
+const char *
+get_native_charset ()
+{
+ return active_charset_name;
+}
+
+/****************
+ * Convert string, which is in native encoding to UTF8 and return the
+ * new allocated UTF8 string.
+ */
+char *
+native_to_utf8 (const char *string)
+{
+ const byte *s;
+ char *buffer;
+ byte *p;
+ size_t length = 0;
+
+ if (no_translation)
+ {
+ buffer = jnlib_xstrdup (string);
+ }
+ else if (active_charset)
+ {
+ for (s = string; *s; s++)
+ {
+ length++;
+ if (*s & 0x80)
+ length += 2; /* we may need 3 bytes */
+ }
+ buffer = jnlib_xmalloc (length + 1);
+ for (p = buffer, s = string; *s; s++)
+ {
+ if ((*s & 0x80))
+ {
+ ushort val = active_charset[*s & 0x7f];
+ if (val < 0x0800)
+ {
+ *p++ = 0xc0 | ((val >> 6) & 0x1f);
+ *p++ = 0x80 | (val & 0x3f);
+ }
+ else
+ {
+ *p++ = 0xe0 | ((val >> 12) & 0x0f);
+ *p++ = 0x80 | ((val >> 6) & 0x3f);
+ *p++ = 0x80 | (val & 0x3f);
+ }
+ }
+ else
+ *p++ = *s;
+ }
+ *p = 0;
+ }
+ else
+ {
+ for (s = string; *s; s++)
+ {
+ length++;
+ if (*s & 0x80)
+ length++;
+ }
+ buffer = jnlib_xmalloc (length + 1);
+ for (p = buffer, s = string; *s; s++)
+ {
+ if (*s & 0x80)
+ {
+ *p++ = 0xc0 | ((*s >> 6) & 3);
+ *p++ = 0x80 | (*s & 0x3f);
+ }
+ else
+ *p++ = *s;
+ }
+ *p = 0;
+ }
+ return buffer;
+}
+
+
+/* Convert string, which is in UTF8 to native encoding. Replace
+ * illegal encodings by some "\xnn" and quote all control
+ * characters. A character with value DELIM will always be quoted, it
+ * must be a vanilla ASCII character. */
+char *
+utf8_to_native (const char *string, size_t length, int delim)
+{
+ int nleft;
+ int i;
+ byte encbuf[8];
+ int encidx;
+ const byte *s;
+ size_t n;
+ byte *buffer = NULL, *p = NULL;
+ unsigned long val = 0;
+ size_t slen;
+ int resync = 0;
+
+ /* 1. pass (p==NULL): count the extended utf-8 characters */
+ /* 2. pass (p!=NULL): create string */
+ for (;;)
+ {
+ for (slen = length, nleft = encidx = 0, n = 0, s = string; slen;
+ s++, slen--)
+ {
+ if (resync)
+ {
+ if (!(*s < 128 || (*s >= 0xc0 && *s <= 0xfd)))
+ {
+ /* still invalid */
+ if (p)
+ {
+ sprintf (p, "\\x%02x", *s);
+ p += 4;
+ }
+ n += 4;
+ continue;
+ }
+ resync = 0;
+ }
+ if (!nleft)
+ {
+ if (!(*s & 0x80))
+ { /* plain ascii */
+ if (*s < 0x20 || *s == 0x7f || *s == delim ||
+ (delim && *s == '\\'))
+ {
+ n++;
+ if (p)
+ *p++ = '\\';
+ switch (*s)
+ {
+ case '\n':
+ n++;
+ if (p)
+ *p++ = 'n';
+ break;
+ case '\r':
+ n++;
+ if (p)
+ *p++ = 'r';
+ break;
+ case '\f':
+ n++;
+ if (p)
+ *p++ = 'f';
+ break;
+ case '\v':
+ n++;
+ if (p)
+ *p++ = 'v';
+ break;
+ case '\b':
+ n++;
+ if (p)
+ *p++ = 'b';
+ break;
+ case 0:
+ n++;
+ if (p)
+ *p++ = '0';
+ break;
+ default:
+ n += 3;
+ if (p)
+ {
+ sprintf (p, "x%02x", *s);
+ p += 3;
+ }
+ break;
+ }
+ }
+ else
+ {
+ if (p)
+ *p++ = *s;
+ n++;
+ }
+ }
+ else if ((*s & 0xe0) == 0xc0)
+ { /* 110x xxxx */
+ val = *s & 0x1f;
+ nleft = 1;
+ encidx = 0;
+ encbuf[encidx++] = *s;
+ }
+ else if ((*s & 0xf0) == 0xe0)
+ { /* 1110 xxxx */
+ val = *s & 0x0f;
+ nleft = 2;
+ encidx = 0;
+ encbuf[encidx++] = *s;
+ }
+ else if ((*s & 0xf8) == 0xf0)
+ { /* 1111 0xxx */
+ val = *s & 0x07;
+ nleft = 3;
+ encidx = 0;
+ encbuf[encidx++] = *s;
+ }
+ else if ((*s & 0xfc) == 0xf8)
+ { /* 1111 10xx */
+ val = *s & 0x03;
+ nleft = 4;
+ encidx = 0;
+ encbuf[encidx++] = *s;
+ }
+ else if ((*s & 0xfe) == 0xfc)
+ { /* 1111 110x */
+ val = *s & 0x01;
+ nleft = 5;
+ encidx = 0;
+ encbuf[encidx++] = *s;
+ }
+ else
+ { /* invalid encoding: print as \xnn */
+ if (p)
+ {
+ sprintf (p, "\\x%02x", *s);
+ p += 4;
+ }
+ n += 4;
+ resync = 1;
+ }
+ }
+ else if (*s < 0x80 || *s >= 0xc0)
+ { /* invalid */
+ if (p)
+ {
+ for (i = 0; i < encidx; i++)
+ {
+ sprintf (p, "\\x%02x", encbuf[i]);
+ p += 4;
+ }
+ sprintf (p, "\\x%02x", *s);
+ p += 4;
+ }
+ n += 4 + 4 * encidx;
+ nleft = 0;
+ encidx = 0;
+ resync = 1;
+ }
+ else
+ {
+ encbuf[encidx++] = *s;
+ val <<= 6;
+ val |= *s & 0x3f;
+ if (!--nleft)
+ { /* ready */
+ if (no_translation)
+ {
+ if (p)
+ {
+ for (i = 0; i < encidx; i++)
+ *p++ = encbuf[i];
+ }
+ n += encidx;
+ encidx = 0;
+ }
+ else if (active_charset)
+ { /* table lookup */
+ for (i = 0; i < 128; i++)
+ {
+ if (active_charset[i] == val)
+ break;
+ }
+ if (i < 128)
+ { /* we can print this one */
+ if (p)
+ *p++ = i + 128;
+ n++;
+ }
+ else
+ { /* we do not have a translation: print utf8 */
+ if (p)
+ {
+ for (i = 0; i < encidx; i++)
+ {
+ sprintf (p, "\\x%02x", encbuf[i]);
+ p += 4;
+ }
+ }
+ n += encidx * 4;
+ encidx = 0;
+ }
+ }
+ else
+ { /* native set */
+ if (val >= 0x80 && val < 256)
+ {
+ n++; /* we can simply print this character */
+ if (p)
+ *p++ = val;
+ }
+ else
+ { /* we do not have a translation: print utf8 */
+ if (p)
+ {
+ for (i = 0; i < encidx; i++)
+ {
+ sprintf (p, "\\x%02x", encbuf[i]);
+ p += 4;
+ }
+ }
+ n += encidx * 4;
+ encidx = 0;
+ }
+ }
+ }
+
+ }
+ }
+ if (!buffer)
+ { /* allocate the buffer after the first pass */
+ buffer = p = jnlib_xmalloc (n + 1);
+ }
+ else
+ {
+ *p = 0; /* make a string */
+ return buffer;
+ }
+ }
+}
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