--- /dev/null
+/* Recode Serbian text from Cyrillic to Latin script.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+ Written by Danilo Šegan <danilo@gnome.org>, 2006,
+ and Bruno Haible <bruno@clisp.org>, 2006.
+
+ This program 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, or (at your option)
+ any later version.
+
+ This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification. */
+#include "filters.h"
+
+#include <stdlib.h>
+
+#include "xalloc.h"
+
+
+/* Table for Serbian Cyrillic to Latin transcription.
+ The table is indexed by the Unicode code point, in the range 0x0400..0x045f.
+ The longest table entry is three bytes long. */
+static const char table[96][3 + 1] =
+{
+ /* U+0400 */ "",
+ /* U+0401 */ "",
+ /* U+0402 */ "\xC4\x90", /* "Đ" */
+ /* U+0403 */ "",
+ /* U+0404 */ "",
+ /* U+0405 */ "",
+ /* U+0406 */ "",
+ /* U+0407 */ "",
+ /* U+0408 */ "J",
+ /* U+0409 */ "Lj",
+ /* U+040A */ "Nj",
+ /* U+040B */ "\xC4\x86", /* "Ć" */
+ /* U+040C */ "",
+ /* U+040D */ "",
+ /* U+040E */ "",
+ /* U+040F */ "D\xC5\xBE", /* "Dž" */
+ /* U+0410 */ "A",
+ /* U+0411 */ "B",
+ /* U+0412 */ "V",
+ /* U+0413 */ "G",
+ /* U+0414 */ "D",
+ /* U+0415 */ "E",
+ /* U+0416 */ "\xC5\xBD", /* "Ž" */
+ /* U+0417 */ "Z",
+ /* U+0418 */ "I",
+ /* U+0419 */ "",
+ /* U+041A */ "K",
+ /* U+041B */ "L",
+ /* U+041C */ "M",
+ /* U+041D */ "N",
+ /* U+041E */ "O",
+ /* U+041F */ "P",
+ /* U+0420 */ "R",
+ /* U+0421 */ "S",
+ /* U+0422 */ "T",
+ /* U+0423 */ "U",
+ /* U+0424 */ "F",
+ /* U+0425 */ "H",
+ /* U+0426 */ "C",
+ /* U+0427 */ "\xC4\x8C", /* "Č" */
+ /* U+0428 */ "\xC5\xA0", /* "Š" */
+ /* U+0429 */ "",
+ /* U+042A */ "",
+ /* U+042B */ "",
+ /* U+042C */ "",
+ /* U+042D */ "",
+ /* U+042E */ "",
+ /* U+042F */ "",
+ /* U+0430 */ "a",
+ /* U+0431 */ "b",
+ /* U+0432 */ "v",
+ /* U+0433 */ "g",
+ /* U+0434 */ "d",
+ /* U+0435 */ "e",
+ /* U+0436 */ "\xC5\xBE", /* "ž" */
+ /* U+0437 */ "z",
+ /* U+0438 */ "i",
+ /* U+0439 */ "",
+ /* U+043A */ "k",
+ /* U+043B */ "l",
+ /* U+043C */ "m",
+ /* U+043D */ "n",
+ /* U+043E */ "o",
+ /* U+043F */ "p",
+ /* U+0440 */ "r",
+ /* U+0441 */ "s",
+ /* U+0442 */ "t",
+ /* U+0443 */ "u",
+ /* U+0444 */ "f",
+ /* U+0445 */ "h",
+ /* U+0446 */ "c",
+ /* U+0447 */ "\xC4\x8D", /* "č" */
+ /* U+0448 */ "\xC5\xA1", /* "š" */
+ /* U+0449 */ "",
+ /* U+044A */ "",
+ /* U+044B */ "",
+ /* U+044C */ "",
+ /* U+044D */ "",
+ /* U+044E */ "",
+ /* U+044F */ "",
+ /* U+0450 */ "",
+ /* U+0451 */ "",
+ /* U+0452 */ "\xC4\x91", /* "đ" */
+ /* U+0453 */ "",
+ /* U+0454 */ "",
+ /* U+0455 */ "",
+ /* U+0456 */ "",
+ /* U+0457 */ "",
+ /* U+0458 */ "j",
+ /* U+0459 */ "lj",
+ /* U+045A */ "nj",
+ /* U+045B */ "\xC4\x87", /* "ć" */
+ /* U+045C */ "",
+ /* U+045D */ "",
+ /* U+045E */ "",
+ /* U+045F */ "d\xC5\xBE" /* "dž" */
+};
+
+/* Quick test for an uppercase character in the range U+0041..U+005A.
+ The argument must be a byte in the range 0..UCHAR_MAX. */
+#define IS_UPPERCASE_LATIN(byte) \
+ ((unsigned char) ((byte) - 'A') <= 'Z' - 'A')
+
+/* Quick test for an uppercase character in the range U+0400..U+042F.
+ The arguments must be bytes in the range 0..UCHAR_MAX. */
+#define IS_UPPERCASE_CYRILLIC(byte1,byte2) \
+ ((byte1) == 0xd0 && (unsigned char) ((byte2) - 0x80) < 0x30)
+
+void
+serbian_to_latin (const char *input, size_t input_len,
+ char **output_p, size_t *output_len_p)
+{
+ /* Loop through the input string, producing a replacement for each character.
+ Only characters in the range U+0400..U+045F (\xD0\x80..\xD1\x9F) need to
+ be handled, and more precisely only those for which a replacement exists
+ in the table. Other characters are copied without modification.
+ The characters U+0409, U+040A, U+040F are transliterated to uppercase or
+ mixed-case replacements ("LJ" / "Lj", "NJ" / "Nj", "DŽ" / "Dž"), depending
+ on the case of the surrounding characters.
+ Since we assume UTF-8 encoding, the bytes \xD0..\xD1 can only occur at the
+ beginning of a character; the second and further bytes of a character are
+ all in the range \x80..\xBF. */
+
+ /* Since sequences of 2 bytes are sequences of at most 3 bytes, the size
+ of the output will be at most 1.5 * input_len. */
+ size_t allocated = input_len + (input_len >> 1);
+ char *output = (char *) xmalloc (allocated);
+
+ const char *input_end = input + input_len;
+ const char *ip;
+ char *op;
+
+ for (ip = input, op = output; ip < input_end; )
+ {
+ unsigned char byte = (unsigned char) *ip;
+
+ /* Test for the first byte of a Cyrillic character. */
+ if ((byte >= 0xd0 && byte <= 0xd1) && (ip + 1 < input_end))
+ {
+ unsigned char second_byte = (unsigned char) ip[1];
+
+ /* Verify the second byte is valid. */
+ if (second_byte >= 0x80 && second_byte < 0xc0)
+ {
+ unsigned int uc = ((byte & 0x1f) << 6) | (second_byte & 0x3f);
+
+ if (uc >= 0x0400 && uc <= 0x045f)
+ {
+ /* Look up replacement from the table. */
+ const char *repl = table[uc - 0x0400];
+
+ if (repl[0] != '\0')
+ {
+ /* Found a replacement.
+ Now handle the special cases. */
+ if (uc == 0x0409 || uc == 0x040a || uc == 0x040f)
+ if ((ip + 2 < input_end
+ && IS_UPPERCASE_LATIN ((unsigned char) ip[2]))
+ || (ip + 3 < input_end
+ && IS_UPPERCASE_CYRILLIC ((unsigned char) ip[2],
+ (unsigned char) ip[3]))
+ || (ip >= input + 1
+ && IS_UPPERCASE_LATIN ((unsigned char) ip[-1]))
+ || (ip >= input + 2
+ && IS_UPPERCASE_CYRILLIC ((unsigned char) ip[-2],
+ (unsigned char) ip[-1])))
+ {
+ /* Use the upper-case replacement instead of
+ the mixed-case replacement. */
+ switch (uc)
+ {
+ case 0x0409:
+ repl = "LJ"; break;
+ case 0x040a:
+ repl = "NJ"; break;
+ case 0x040f:
+ repl = "D\xC5\xBD"/* "DŽ" */; break;
+ default:
+ abort ();
+ }
+ }
+
+ /* Use the replacement. */
+ *op++ = *repl++;
+ if (*repl != '\0')
+ {
+ *op++ = *repl++;
+ if (*repl != '\0')
+ {
+ *op++ = *repl++;
+ /* All replacements have at most 3 bytes. */
+ if (*repl != '\0')
+ abort ();
+ }
+ }
+ ip += 2;
+ continue;
+ }
+ }
+ }
+ }
+ *op++ = *ip++;
+ }
+
+ {
+ size_t output_len = op - output;
+
+ /* Verify that the allocated size was not exceeded. */
+ if (output_len > allocated)
+ abort ();
+ /* Shrink the result. */
+ if (output_len < allocated)
+ output = (char *) xrealloc (output, output_len);
+
+ /* Done. */
+ *output_p = output;
+ *output_len_p = output_len;
+ }
+}
projects / thirdparty / gettext.git / commitdiff
