Allow overriding the newline conversion for EBCDIC encodings.
[libiconv.git] / lib / java.h
blob841bfa9e7413753810f01fea887773cdd8277444
1 /*
2 * Copyright (C) 1999-2002, 2016 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either version 2.1
8 * of the License, or (at your option) any later version.
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 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, see <https://www.gnu.org/licenses/>.
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.
27 static int
28 java_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
30 unsigned char c;
31 ucs4_t wc, wc2;
32 int i;
34 c = s[0];
35 if (c != '\\') {
36 *pwc = c;
37 return 1;
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));
58 if (!(wc >= 0xd800 && wc < 0xe000)) {
59 *pwc = wc;
60 return 6;
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));
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;
96 static int
97 java_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
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;
135 return RET_ILUNI;