fdwalk should return 0 on an empty directory
[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) 1997-1999, 2000-2002 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 Lesser General Public
9    License as published by the Free Software Foundation; either
10    version 2.1 of the 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    Lesser General Public License for more details.
16
17    You should have received a copy of the GNU Lesser General Public
18    License along with the GNU C Library; if not, write to the Free
19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20    02111-1307 USA.  */
21
22 #include <dlfcn.h>
23 #include <stdint.h>
24
25 struct gap
26 {
27   uint16_t start;
28   uint16_t end;
29   int32_t idx;
30 };
31
32 /* Now we can include the tables.  */
33 #include TABLES
34
35 #ifndef NONNUL
36 # define NONNUL(c)      ((c) != '\0')
37 #endif
38
39
40 #define FROM_LOOP               from_gap
41 #define TO_LOOP                 to_gap
42 #define DEFINE_INIT             1
43 #define DEFINE_FINI             1
44 #define MIN_NEEDED_FROM         1
45 #define MIN_NEEDED_TO           4
46
47
48 /* First define the conversion function from the 8bit charset to UCS4.  */
49 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
50 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
51 #define LOOPFCT                 FROM_LOOP
52 #define BODY \
53   {                                                                           \
54     uint32_t ch = to_ucs4[*inptr];                                            \
55                                                                               \
56     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (*inptr))    \
57       {                                                                       \
58         /* This is an illegal character.  */                                  \
59         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
60       }                                                                       \
61     else                                                                      \
62       {                                                                       \
63         put32 (outptr, ch);                                                   \
64         outptr += 4;                                                          \
65       }                                                                       \
66                                                                               \
67     ++inptr;                                                                  \
68   }
69 #define LOOP_NEED_FLAGS
70 #define ONEBYTE_BODY \
71   {                                                                           \
72     uint32_t ch = to_ucs4[c];                                                 \
73                                                                               \
74     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (c))         \
75       return WEOF;                                                            \
76     else                                                                      \
77       return ch;                                                              \
78   }
79 #include <iconv/loop.c>
80
81
82 /* Next, define the other direction.  */
83 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
84 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
85 #define LOOPFCT                 TO_LOOP
86 #define BODY \
87   {                                                                           \
88     const struct gap *rp = from_idx;                                          \
89     uint32_t ch = get32 (inptr);                                              \
90     unsigned char res;                                                        \
91                                                                               \
92     if (__builtin_expect (ch >= 0xffff, 0))                                   \
93       {                                                                       \
94         UNICODE_TAG_HANDLER (ch, 4);                                          \
95         rp = NULL;                                                            \
96       }                                                                       \
97     else                                                                      \
98       while (ch > rp->end)                                                    \
99         ++rp;                                                                 \
100     if (__builtin_expect (rp == NULL, 0)                                      \
101         || __builtin_expect (ch < rp->start, 0)                               \
102         || (res = from_ucs4[ch + rp->idx],                                    \
103             __builtin_expect (res, '\1') == '\0' && ch != 0))                 \
104       {                                                                       \
105         /* This is an illegal character.  */                                  \
106         STANDARD_TO_LOOP_ERR_HANDLER (4);                                     \
107       }                                                                       \
108                                                                               \
109     *outptr++ = res;                                                          \
110     inptr += 4;                                                               \
111   }
112 #define LOOP_NEED_FLAGS
113 #include <iconv/loop.c>
114
115
116 /* Now define the toplevel functions.  */
117 #include <iconv/skeleton.c>