1/* Generic conversion to and from 8bit charsets,
2 converting from UCS using gaps.
3 Copyright (C) 1997-2023 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <dlfcn.h>
21#include <stdint.h>
22
23struct gap
24{
25 uint16_t start;
26 uint16_t end;
27 int32_t idx;
28};
29
30/* Now we can include the tables. */
31#include TABLES
32
33#ifndef NONNUL
34# define NONNUL(c) ((c) != '\0')
35#endif
36
37
38#define FROM_LOOP from_gap
39#define TO_LOOP to_gap
40#define DEFINE_INIT 1
41#define DEFINE_FINI 1
42#define MIN_NEEDED_FROM 1
43#define MIN_NEEDED_TO 4
44#define ONE_DIRECTION 0
45
46
47/* First define the conversion function from the 8bit charset to UCS4. */
48#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
49#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
50#define LOOPFCT FROM_LOOP
51#define BODY \
52 { \
53 uint32_t ch = to_ucs4[*inptr]; \
54 \
55 if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (*inptr)) \
56 { \
57 /* This is an illegal character. */ \
58 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
59 } \
60 else \
61 { \
62 put32 (outptr, ch); \
63 outptr += 4; \
64 } \
65 \
66 ++inptr; \
67 }
68#define LOOP_NEED_FLAGS
69#define ONEBYTE_BODY \
70 { \
71 uint32_t ch = to_ucs4[c]; \
72 \
73 if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (c)) \
74 return WEOF; \
75 else \
76 return ch; \
77 }
78#include <iconv/loop.c>
79
80
81/* Next, define the other direction. */
82#define MIN_NEEDED_INPUT MIN_NEEDED_TO
83#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
84#define LOOPFCT TO_LOOP
85#define BODY \
86 { \
87 const struct gap *rp = from_idx; \
88 uint32_t ch = get32 (inptr); \
89 unsigned char res; \
90 \
91 if (__glibc_unlikely (ch >= 0xffff)) \
92 { \
93 UNICODE_TAG_HANDLER (ch, 4); \
94 rp = NULL; \
95 } \
96 else \
97 while (ch > rp->end) \
98 ++rp; \
99 if (__builtin_expect (rp == NULL, 0) \
100 || __builtin_expect (ch < rp->start, 0) \
101 || (res = from_ucs4[ch + rp->idx], \
102 __builtin_expect (res, '\1') == '\0' && ch != 0)) \
103 { \
104 /* This is an illegal character. */ \
105 STANDARD_TO_LOOP_ERR_HANDLER (4); \
106 } \
107 \
108 *outptr++ = res; \
109 inptr += 4; \
110 }
111#define LOOP_NEED_FLAGS
112#include <iconv/loop.c>
113
114
115/* Now define the toplevel functions. */
116#include <iconv/skeleton.c>
117