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Annotation of embedaddon/libiconv/lib/java.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 1999-2002 Free Software Foundation, Inc.
        !             3:  * This file is part of the GNU LIBICONV Library.
        !             4:  *
        !             5:  * The GNU LIBICONV Library is free software; you can redistribute it
        !             6:  * and/or modify it under the terms of the GNU Library General Public
        !             7:  * License as published by the Free Software Foundation; either version 2
        !             8:  * of the License, or (at your option) any later version.
        !             9:  *
        !            10:  * The GNU LIBICONV Library is distributed in the hope that it will be
        !            11:  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            13:  * Library General Public License for more details.
        !            14:  *
        !            15:  * You should have received a copy of the GNU Library General Public
        !            16:  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
        !            17:  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
        !            18:  * Fifth Floor, Boston, MA 02110-1301, USA.
        !            19:  */
        !            20: 
        !            21: /*
        !            22:  * JAVA
        !            23:  * This is ISO 8859-1 with \uXXXX escape sequences, denoting Unicode BMP
        !            24:  * characters. Consecutive pairs of \uXXXX escape sequences in the surrogate
        !            25:  * range, as in UTF-16, denote Unicode characters outside the BMP.
        !            26:  */
        !            27: 
        !            28: static int
        !            29: java_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
        !            30: {
        !            31:   unsigned char c;
        !            32:   ucs4_t wc, wc2;
        !            33:   int i;
        !            34: 
        !            35:   c = s[0];
        !            36:   if (c != '\\') {
        !            37:     *pwc = c;
        !            38:     return 1;
        !            39:   }
        !            40:   if (n < 2)
        !            41:     return RET_TOOFEW(0);
        !            42:   if (s[1] != 'u')
        !            43:     goto simply_backslash;
        !            44:   wc = 0;
        !            45:   for (i = 2; i < 6; i++) {
        !            46:     if (n <= i)
        !            47:       return RET_TOOFEW(0);
        !            48:     c = s[i];
        !            49:     if (c >= '0' && c <= '9')
        !            50:       c -= '0';
        !            51:     else if (c >= 'A' && c <= 'Z')
        !            52:       c -= 'A'-10;
        !            53:     else if (c >= 'a' && c <= 'z')
        !            54:       c -= 'a'-10;
        !            55:     else
        !            56:       goto simply_backslash;
        !            57:     wc |= (ucs4_t) c << (4 * (5-i));
        !            58:   }
        !            59:   if (!(wc >= 0xd800 && wc < 0xe000)) {
        !            60:     *pwc = wc;
        !            61:     return 6;
        !            62:   }
        !            63:   if (wc >= 0xdc00)
        !            64:     goto simply_backslash;
        !            65:   if (n < 7)
        !            66:     return RET_TOOFEW(0);
        !            67:   if (s[6] != '\\')
        !            68:     goto simply_backslash;
        !            69:   if (n < 8)
        !            70:     return RET_TOOFEW(0);
        !            71:   if (s[7] != 'u')
        !            72:     goto simply_backslash;
        !            73:   wc2 = 0;
        !            74:   for (i = 8; i < 12; i++) {
        !            75:     if (n <= i)
        !            76:       return RET_TOOFEW(0);
        !            77:     c = s[i];
        !            78:     if (c >= '0' && c <= '9')
        !            79:       c -= '0';
        !            80:     else if (c >= 'A' && c <= 'Z')
        !            81:       c -= 'A'-10;
        !            82:     else if (c >= 'a' && c <= 'z')
        !            83:       c -= 'a'-10;
        !            84:     else
        !            85:       goto simply_backslash;
        !            86:     wc2 |= (ucs4_t) c << (4 * (11-i));
        !            87:   }
        !            88:   if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
        !            89:     goto simply_backslash;
        !            90:   *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
        !            91:   return 12;
        !            92: simply_backslash:
        !            93:   *pwc = '\\';
        !            94:   return 1;
        !            95: }
        !            96: 
        !            97: static int
        !            98: java_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
        !            99: {
        !           100:   if (wc < 0x80) {
        !           101:     *r = wc;
        !           102:     return 1;
        !           103:   } else if (wc < 0x10000) {
        !           104:     if (n >= 6) {
        !           105:       unsigned int i;
        !           106:       r[0] = '\\';
        !           107:       r[1] = 'u';
        !           108:       i = (wc >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
        !           109:       i = (wc >> 8) & 0x0f;  r[3] = (i < 10 ? '0'+i : 'a'-10+i);
        !           110:       i = (wc >> 4) & 0x0f;  r[4] = (i < 10 ? '0'+i : 'a'-10+i);
        !           111:       i = wc & 0x0f;         r[5] = (i < 10 ? '0'+i : 'a'-10+i);
        !           112:       return 6;
        !           113:     } else
        !           114:       return RET_TOOSMALL;
        !           115:   } else if (wc < 0x110000) {
        !           116:     if (n >= 12) {
        !           117:       ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
        !           118:       ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
        !           119:       unsigned int i;
        !           120:       r[0] = '\\';
        !           121:       r[1] = 'u';
        !           122:       i = (wc1 >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
        !           123:       i = (wc1 >> 8) & 0x0f;  r[3] = (i < 10 ? '0'+i : 'a'-10+i);
        !           124:       i = (wc1 >> 4) & 0x0f;  r[4] = (i < 10 ? '0'+i : 'a'-10+i);
        !           125:       i = wc1 & 0x0f;         r[5] = (i < 10 ? '0'+i : 'a'-10+i);
        !           126:       r[6] = '\\';
        !           127:       r[7] = 'u';
        !           128:       i = (wc2 >> 12) & 0x0f; r[8] = (i < 10 ? '0'+i : 'a'-10+i);
        !           129:       i = (wc2 >> 8) & 0x0f;  r[9] = (i < 10 ? '0'+i : 'a'-10+i);
        !           130:       i = (wc2 >> 4) & 0x0f; r[10] = (i < 10 ? '0'+i : 'a'-10+i);
        !           131:       i = wc2 & 0x0f;        r[11] = (i < 10 ? '0'+i : 'a'-10+i);
        !           132:       return 12;
        !           133:     } else
        !           134:       return RET_TOOSMALL;
        !           135:   }
        !           136:   return RET_ILUNI;
        !           137: }