5ab2975bde41bbcb7b79a7dc6529a1239541cda0
[kopensolaris-gnu/glibc.git] / iconvdata / 8bit-gap.c
1 /* Generic conversion to and from 8bit charsets,
2    converting from UCS using gaps.
3    Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
4    This file is part of the GNU C Library.
5    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6
7    The GNU C Library is free software; you can redistribute it and/or
8    modify it under the terms of the GNU Library General Public License as
9    published by the Free Software Foundation; either version 2 of the
10    License, or (at your option) any later version.
11
12    The GNU C Library is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15    Library General Public License for more details.
16
17    You should have received a copy of the GNU Library General Public
18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
19    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20    Boston, MA 02111-1307, USA.  */
21
22 #include <stdint.h>
23
24 struct gap
25 {
26   uint16_t start;
27   uint16_t end;
28   int32_t idx;
29 };
30
31 /* Now we can include the tables.  */
32 #include TABLES
33
34
35 #define FROM_LOOP               from_gap
36 #define TO_LOOP                 to_gap
37 #define DEFINE_INIT             1
38 #define DEFINE_FINI             1
39 #define MIN_NEEDED_FROM         1
40 #define MIN_NEEDED_TO           4
41
42
43 /* First define the conversion function from the 8bit charset to UCS4.  */
44 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
45 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
46 #define LOOPFCT                 FROM_LOOP
47 #define BODY \
48   {                                                                           \
49     uint32_t ch = to_ucs4[*inptr];                                            \
50                                                                               \
51     if (HAS_HOLES && ch == L'\0' && *inptr != '\0')                           \
52       {                                                                       \
53         /* This is an illegal character.  */                                  \
54         result = __GCONV_ILLEGAL_INPUT;                                       \
55         break;                                                                \
56       }                                                                       \
57                                                                               \
58     *((uint32_t *) outptr)++ = ch;                                            \
59     ++inptr;                                                                  \
60   }
61 #include <iconv/loop.c>
62
63
64 /* Next, define the other direction.  */
65 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
66 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
67 #define LOOPFCT                 TO_LOOP
68 #define BODY \
69   {                                                                           \
70     const struct gap *rp = from_idx;                                          \
71     uint32_t ch = *((uint32_t *) inptr);                                      \
72     unsigned char res;                                                        \
73                                                                               \
74     if (ch >= 0xffff)                                                         \
75       {                                                                       \
76         /* This is an illegal character.  */                                  \
77         result = __GCONV_ILLEGAL_INPUT;                                       \
78         break;                                                                \
79       }                                                                       \
80     while (ch > rp->end)                                                      \
81       ++rp;                                                                   \
82     if (ch < rp->start)                                                       \
83       {                                                                       \
84         /* This is an illegal character.  */                                  \
85         result = __GCONV_ILLEGAL_INPUT;                                       \
86         break;                                                                \
87       }                                                                       \
88                                                                               \
89     res = from_ucs4[ch + rp->idx];                                            \
90     if (ch != 0 && res == '\0')                                               \
91       {                                                                       \
92         /* This is an illegal character.  */                                  \
93         result = __GCONV_ILLEGAL_INPUT;                                       \
94         break;                                                                \
95       }                                                                       \
96                                                                               \
97     *outptr++ = res;                                                          \
98     inptr += 4;                                                               \
99   }
100 #include <iconv/loop.c>
101
102
103 /* Now define the toplevel functions.  */
104 #include <iconv/skeleton.c>