about summary refs log tree commit diff
path: root/iconv/gconv_int.h
blob: 29f495c30f1fc9ae52bdf69f13354b9b44f2307c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _GCONV_INT_H
#define _GCONV_INT_H	1

#include "gconv.h"
#include <regex.h>

__BEGIN_DECLS


/* Structure for alias definition.  Simply to strings.  */
struct gconv_alias
{
  const char *fromname;
  const char *toname;
};


/* How many character should be conveted in one call?  */
#define GCONV_NCHAR_GOAL	8160


/* Structure describing one loaded shared object.  This normally are
   objects to perform conversation but as a special case the db shared
   object is also handled.  */
struct __gconv_loaded_object
{
  /* Name of the object.  */
  const char *name;

  /* Reference counter for the db functionality.  If no conversion is
     needed we unload the db library.  */
  int counter;

  /* The handle for the shared object.  */
  struct link_map *handle;

  /* Pointer to the functions the module defines.  */
  __gconv_fct fct;
  __gconv_init_fct init_fct;
  __gconv_end_fct end_fct;
};


/* Description for an available conversion module.  */
struct gconv_module
{
  const char *from_pattern;
  const char *from_constpfx;
  size_t from_constpfx_len;
  const regex_t *from_regex;
  regex_t from_regex_mem;

  const char *to_string;

  int cost_hi;
  int cost_lo;

  const char *module_name;

  struct gconv_module *left;	/* Prefix smaller.  */
  struct gconv_module *same;	/* List of entries with identical prefix.  */
  struct gconv_module *matching;/* Next node with more specific prefix.  */
  struct gconv_module *right;	/* Prefix larger.  */
};


/* Global variables.  */

/* Database of alias names.  */
extern void *__gconv_alias_db;

/* Array with available modules.  */
extern size_t __gconv_nmodules;
extern struct gconv_module *__gconv_modules_db;


/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET.  */
extern int __gconv_open (const char *__toset, const char *__fromset,
			 __gconv_t *__handle)
     internal_function;

/* Free resources associated with transformation descriptor CD.  */
extern int __gconv_close (__gconv_t cd)
     internal_function;

/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
   according to rules described by CD and place up to *OUTBYTESLEFT
   bytes in buffer starting at *OUTBUF.  Return number of written
   characters in *CONVERTED if this pointer is not null.  */
extern int __gconv (__gconv_t __cd, const unsigned char **__inbuf,
		    const unsigned char *inbufend, unsigned char **__outbuf,
		    unsigned char *outbufend, size_t *converted)
     internal_function;

/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
   the single steps necessary for transformation from FROMSET to TOSET.  */
extern int __gconv_find_transform (const char *__toset, const char *__fromset,
				   struct __gconv_step **__handle,
				   size_t *__nsteps)
     internal_function;

/* Read all the configuration data and cache it.  */
extern void __gconv_read_conf (void);

/* Comparison function to search alias.  */
extern int __gconv_alias_compare (const void *__p1, const void *__p2);

/* Clear reference to transformation step implementations which might
   cause the code to be unloaded.  */
extern int __gconv_close_transform (struct __gconv_step *__steps,
				    size_t __nsteps)
     internal_function;

/* Load shared object named by NAME.  If already loaded increment reference
   count.  */
extern struct __gconv_loaded_object *__gconv_find_shlib (const char *__name)
     internal_function;

/* Find function named NAME in shared object referenced by HANDLE.  */
void *__gconv_find_func (void *handle, const char *name)
     internal_function;

/* Release shared object.  If no further reference is available unload
   the object.  */
extern int __gconv_release_shlib (struct __gconv_loaded_object *__handle)
     internal_function;

/* Fill STEP with information about builtin module with NAME.  */
extern void __gconv_get_builtin_trans (const char *__name,
				       struct __gconv_step *__step)
     internal_function;



/* Builtin transformations.  */
#ifdef _LIBC
# define __BUILTIN_TRANS(Name) \
  extern int Name (struct __gconv_step *__step,				      \
		   struct __gconv_step_data *__data,			      \
		   const unsigned char **__inbuf,			      \
		   const unsigned char *__inbufend, size_t *__written,	      \
		   int __do_flush)

__BUILTIN_TRANS (__gconv_transform_ascii_internal);
__BUILTIN_TRANS (__gconv_transform_internal_ascii);
__BUILTIN_TRANS (__gconv_transform_utf8_internal);
__BUILTIN_TRANS (__gconv_transform_internal_utf8);
__BUILTIN_TRANS (__gconv_transform_ucs2_internal);
__BUILTIN_TRANS (__gconv_transform_internal_ucs2);
__BUILTIN_TRANS (__gconv_transform_ucs2little_internal);
__BUILTIN_TRANS (__gconv_transform_internal_ucs2little);
__BUILTIN_TRANS (__gconv_transform_internal_ucs4);
__BUILTIN_TRANS (__gconv_transform_internal_utf16);
__BUILTIN_TRANS (__gconv_transform_utf16_internal);
# undef __BUITLIN_TRANS

#endif

__END_DECLS

#endif /* gconv_int.h */