1 /* Conversion module for Unicode
2 Copyright (C) 1999, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
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 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
28 /* This is the Byte Order Mark character (BOM). */
30 /* And in the other endian format. */
34 /* Definitions used in the body of the `gconv' function. */
35 #define FROM_LOOP from_unicode_loop
36 #define TO_LOOP to_unicode_loop
39 #define MIN_NEEDED_FROM 2
40 #define MIN_NEEDED_TO 4
41 #define FROM_DIRECTION (dir == from_unicode)
42 #define PREPARE_LOOP \
43 enum direction dir = ((struct unicode_data *) step->__data)->dir; \
47 if (data->__invocation_counter == 0) \
49 /* We have to find out which byte order the file is encoded in. */ \
50 if (inptr + 2 > inend) \
51 return __GCONV_EMPTY_INPUT; \
53 if (get16u (inptr) == BOM) \
54 /* Simply ignore the BOM character. */ \
56 else if (get16u (inptr) == BOM_OE) \
58 ((struct unicode_data *) step->__data)->swap = 1; \
63 else if (!data->__internal_use && data->__invocation_counter == 0) \
65 /* Emit the Byte Order Mark. */ \
66 if (__builtin_expect (outbuf + 2 > outend, 0)) \
67 return __GCONV_FULL_OUTPUT; \
69 put16u (outbuf, BOM); \
72 swap = ((struct unicode_data *) step->__data)->swap;
73 #define EXTRA_LOOP_ARGS , data, swap
76 /* Direction of the transformation. */
92 gconv_init (struct __gconv_step
*step
)
94 /* Determine which direction. */
95 struct unicode_data
*new_data
;
96 enum direction dir
= illegal_dir
;
99 if (__strcasecmp (step
->__from_name
, "UNICODE") == 0)
104 new_data
= (struct unicode_data
*) malloc (sizeof (struct unicode_data
));
106 result
= __GCONV_NOMEM
;
107 if (new_data
!= NULL
)
111 step
->__data
= new_data
;
113 if (dir
== from_unicode
)
115 step
->__min_needed_from
= MIN_NEEDED_FROM
;
116 step
->__max_needed_from
= MIN_NEEDED_FROM
;
117 step
->__min_needed_to
= MIN_NEEDED_TO
;
118 step
->__max_needed_to
= MIN_NEEDED_TO
;
122 step
->__min_needed_from
= MIN_NEEDED_TO
;
123 step
->__max_needed_from
= MIN_NEEDED_TO
;
124 step
->__min_needed_to
= MIN_NEEDED_FROM
;
125 step
->__max_needed_to
= MIN_NEEDED_FROM
;
128 step
->__stateful
= 0;
138 gconv_end (struct __gconv_step
*data
)
144 /* Convert from the internal (UCS4-like) format to UCS2. */
145 #define MIN_NEEDED_INPUT MIN_NEEDED_TO
146 #define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
147 #define LOOPFCT TO_LOOP
150 uint32_t c = get32 (inptr); \
152 if (__builtin_expect (c, 0) >= 0x10000) \
154 if (! ignore_errors_p ()) \
156 /* This is an illegal character. */ \
157 result = __GCONV_ILLEGAL_INPUT; \
171 #define EXTRA_LOOP_DECLS \
172 , struct __gconv_step_data *step_data, int swap
173 #include <iconv/loop.c>
176 /* Convert from UCS2 to the internal (UCS4-like) format. */
177 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM
178 #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
179 #define LOOPFCT FROM_LOOP
182 uint16_t u1 = get16 (inptr); \
185 u1 = bswap_16 (u1); \
187 put32 (outptr, u1); \
192 #define EXTRA_LOOP_DECLS \
193 , struct __gconv_step_data *step_data, int swap
194 #include <iconv/loop.c>
197 /* Now define the toplevel functions. */
198 #include <iconv/skeleton.c>