181 lines
5.7 KiB
C
181 lines
5.7 KiB
C
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _GCONV_INT_H
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#define _GCONV_INT_H 1
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#include "gconv.h"
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#include <regex.h>
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__BEGIN_DECLS
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/* Structure for alias definition. Simply to strings. */
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struct gconv_alias
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{
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const char *fromname;
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const char *toname;
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};
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/* How many character should be conveted in one call? */
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#define GCONV_NCHAR_GOAL 8160
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/* Structure describing one loaded shared object. This normally are
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objects to perform conversation but as a special case the db shared
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object is also handled. */
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struct __gconv_loaded_object
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{
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/* Name of the object. */
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const char *name;
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/* Reference counter for the db functionality. If no conversion is
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needed we unload the db library. */
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int counter;
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/* The handle for the shared object. */
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struct link_map *handle;
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/* Pointer to the functions the module defines. */
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__gconv_fct fct;
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__gconv_init_fct init_fct;
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__gconv_end_fct end_fct;
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};
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/* Description for an available conversion module. */
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struct gconv_module
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{
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const char *from_pattern;
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const char *from_constpfx;
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size_t from_constpfx_len;
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const regex_t *from_regex;
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regex_t from_regex_mem;
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const char *to_string;
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int cost_hi;
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int cost_lo;
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const char *module_name;
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struct gconv_module *left; /* Prefix smaller. */
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struct gconv_module *same; /* List of entries with identical prefix. */
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struct gconv_module *matching;/* Next node with more specific prefix. */
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struct gconv_module *right; /* Prefix larger. */
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};
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/* Global variables. */
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/* Database of alias names. */
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extern void *__gconv_alias_db;
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/* Array with available modules. */
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extern size_t __gconv_nmodules;
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extern struct gconv_module *__gconv_modules_db;
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/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
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extern int __gconv_open (const char *__toset, const char *__fromset,
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__gconv_t *__handle)
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internal_function;
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/* Free resources associated with transformation descriptor CD. */
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extern int __gconv_close (__gconv_t cd)
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internal_function;
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/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
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according to rules described by CD and place up to *OUTBYTESLEFT
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bytes in buffer starting at *OUTBUF. Return number of written
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characters in *CONVERTED if this pointer is not null. */
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extern int __gconv (__gconv_t __cd, const unsigned char **__inbuf,
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const unsigned char *inbufend, unsigned char **__outbuf,
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unsigned char *outbufend, size_t *converted)
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internal_function;
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/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
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the single steps necessary for transformation from FROMSET to TOSET. */
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extern int __gconv_find_transform (const char *__toset, const char *__fromset,
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struct __gconv_step **__handle,
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size_t *__nsteps)
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internal_function;
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/* Read all the configuration data and cache it. */
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extern void __gconv_read_conf (void);
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/* Comparison function to search alias. */
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extern int __gconv_alias_compare (const void *__p1, const void *__p2);
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/* Clear reference to transformation step implementations which might
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cause the code to be unloaded. */
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extern int __gconv_close_transform (struct __gconv_step *__steps,
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size_t __nsteps)
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internal_function;
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/* Load shared object named by NAME. If already loaded increment reference
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count. */
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extern struct __gconv_loaded_object *__gconv_find_shlib (const char *__name)
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internal_function;
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/* Find function named NAME in shared object referenced by HANDLE. */
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void *__gconv_find_func (void *handle, const char *name)
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internal_function;
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/* Release shared object. If no further reference is available unload
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the object. */
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extern int __gconv_release_shlib (struct __gconv_loaded_object *__handle)
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internal_function;
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/* Fill STEP with information about builtin module with NAME. */
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extern void __gconv_get_builtin_trans (const char *__name,
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struct __gconv_step *__step)
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internal_function;
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/* Builtin transformations. */
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#ifdef _LIBC
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# define __BUILTIN_TRANS(Name) \
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extern int Name (struct __gconv_step *__step, \
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struct __gconv_step_data *__data, \
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const unsigned char **__inbuf, \
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const unsigned char *__inbufend, size_t *__written, \
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int __do_flush)
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__BUILTIN_TRANS (__gconv_transform_ascii_internal);
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__BUILTIN_TRANS (__gconv_transform_internal_ascii);
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__BUILTIN_TRANS (__gconv_transform_utf8_internal);
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__BUILTIN_TRANS (__gconv_transform_internal_utf8);
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__BUILTIN_TRANS (__gconv_transform_ucs2_internal);
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__BUILTIN_TRANS (__gconv_transform_internal_ucs2);
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__BUILTIN_TRANS (__gconv_transform_ucs2little_internal);
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__BUILTIN_TRANS (__gconv_transform_internal_ucs2little);
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__BUILTIN_TRANS (__gconv_transform_internal_ucs4);
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__BUILTIN_TRANS (__gconv_transform_internal_utf16);
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__BUILTIN_TRANS (__gconv_transform_utf16_internal);
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# undef __BUITLIN_TRANS
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#endif
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__END_DECLS
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#endif /* gconv_int.h */
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