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1 office 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 }