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Annotation of embedaddon/libiconv/lib/java.h, revision 1.1.1.2

1.1       misho       1: /*
1.1.1.2 ! misho       2:  * Copyright (C) 1999-2002, 2016 Free Software Foundation, Inc.
1.1       misho       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.
1.1.1.2 ! misho      17:  * If not, see <https://www.gnu.org/licenses/>.
1.1       misho      18:  */
                     19: 
                     20: /*
                     21:  * JAVA
                     22:  * This is ISO 8859-1 with \uXXXX escape sequences, denoting Unicode BMP
                     23:  * characters. Consecutive pairs of \uXXXX escape sequences in the surrogate
                     24:  * range, as in UTF-16, denote Unicode characters outside the BMP.
                     25:  */
                     26: 
                     27: static int
1.1.1.2 ! misho      28: java_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
1.1       misho      29: {
                     30:   unsigned char c;
                     31:   ucs4_t wc, wc2;
                     32:   int i;
                     33: 
                     34:   c = s[0];
                     35:   if (c != '\\') {
                     36:     *pwc = c;
                     37:     return 1;
                     38:   }
                     39:   if (n < 2)
                     40:     return RET_TOOFEW(0);
                     41:   if (s[1] != 'u')
                     42:     goto simply_backslash;
                     43:   wc = 0;
                     44:   for (i = 2; i < 6; i++) {
                     45:     if (n <= i)
                     46:       return RET_TOOFEW(0);
                     47:     c = s[i];
                     48:     if (c >= '0' && c <= '9')
                     49:       c -= '0';
                     50:     else if (c >= 'A' && c <= 'Z')
                     51:       c -= 'A'-10;
                     52:     else if (c >= 'a' && c <= 'z')
                     53:       c -= 'a'-10;
                     54:     else
                     55:       goto simply_backslash;
                     56:     wc |= (ucs4_t) c << (4 * (5-i));
                     57:   }
                     58:   if (!(wc >= 0xd800 && wc < 0xe000)) {
                     59:     *pwc = wc;
                     60:     return 6;
                     61:   }
                     62:   if (wc >= 0xdc00)
                     63:     goto simply_backslash;
                     64:   if (n < 7)
                     65:     return RET_TOOFEW(0);
                     66:   if (s[6] != '\\')
                     67:     goto simply_backslash;
                     68:   if (n < 8)
                     69:     return RET_TOOFEW(0);
                     70:   if (s[7] != 'u')
                     71:     goto simply_backslash;
                     72:   wc2 = 0;
                     73:   for (i = 8; i < 12; i++) {
                     74:     if (n <= i)
                     75:       return RET_TOOFEW(0);
                     76:     c = s[i];
                     77:     if (c >= '0' && c <= '9')
                     78:       c -= '0';
                     79:     else if (c >= 'A' && c <= 'Z')
                     80:       c -= 'A'-10;
                     81:     else if (c >= 'a' && c <= 'z')
                     82:       c -= 'a'-10;
                     83:     else
                     84:       goto simply_backslash;
                     85:     wc2 |= (ucs4_t) c << (4 * (11-i));
                     86:   }
                     87:   if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
                     88:     goto simply_backslash;
                     89:   *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
                     90:   return 12;
                     91: simply_backslash:
                     92:   *pwc = '\\';
                     93:   return 1;
                     94: }
                     95: 
                     96: static int
1.1.1.2 ! misho      97: java_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1       misho      98: {
                     99:   if (wc < 0x80) {
                    100:     *r = wc;
                    101:     return 1;
                    102:   } else if (wc < 0x10000) {
                    103:     if (n >= 6) {
                    104:       unsigned int i;
                    105:       r[0] = '\\';
                    106:       r[1] = 'u';
                    107:       i = (wc >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
                    108:       i = (wc >> 8) & 0x0f;  r[3] = (i < 10 ? '0'+i : 'a'-10+i);
                    109:       i = (wc >> 4) & 0x0f;  r[4] = (i < 10 ? '0'+i : 'a'-10+i);
                    110:       i = wc & 0x0f;         r[5] = (i < 10 ? '0'+i : 'a'-10+i);
                    111:       return 6;
                    112:     } else
                    113:       return RET_TOOSMALL;
                    114:   } else if (wc < 0x110000) {
                    115:     if (n >= 12) {
                    116:       ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
                    117:       ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
                    118:       unsigned int i;
                    119:       r[0] = '\\';
                    120:       r[1] = 'u';
                    121:       i = (wc1 >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
                    122:       i = (wc1 >> 8) & 0x0f;  r[3] = (i < 10 ? '0'+i : 'a'-10+i);
                    123:       i = (wc1 >> 4) & 0x0f;  r[4] = (i < 10 ? '0'+i : 'a'-10+i);
                    124:       i = wc1 & 0x0f;         r[5] = (i < 10 ? '0'+i : 'a'-10+i);
                    125:       r[6] = '\\';
                    126:       r[7] = 'u';
                    127:       i = (wc2 >> 12) & 0x0f; r[8] = (i < 10 ? '0'+i : 'a'-10+i);
                    128:       i = (wc2 >> 8) & 0x0f;  r[9] = (i < 10 ? '0'+i : 'a'-10+i);
                    129:       i = (wc2 >> 4) & 0x0f; r[10] = (i < 10 ? '0'+i : 'a'-10+i);
                    130:       i = wc2 & 0x0f;        r[11] = (i < 10 ? '0'+i : 'a'-10+i);
                    131:       return 12;
                    132:     } else
                    133:       return RET_TOOSMALL;
                    134:   }
                    135:   return RET_ILUNI;
                    136: }