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241 lines
9 KiB
C
241 lines
9 KiB
C
/* Copyright (C) 1999-2022 Free Software Foundation, Inc.
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This file is part of the GNU LIBICONV Library.
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The GNU LIBICONV Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either version 2.1
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of the License, or (at your option) any later version.
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The GNU LIBICONV Library is distributed in the hope that it will be
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useful, 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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If not, see <https://www.gnu.org/licenses/>. */
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/* When installed, this file is called "iconv.h". */
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#ifndef _LIBICONV_H
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#define _LIBICONV_H
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#define _LIBICONV_VERSION 0x0111 /* version number: (major<<8) + minor */
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extern int _libiconv_version; /* Likewise */
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/* We would like to #include any system header file which could define
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iconv_t, 1. in order to eliminate the risk that the user gets compilation
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errors because some other system header file includes /usr/include/iconv.h
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which defines iconv_t or declares iconv after this file, 2. when compiling
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for LIBICONV_PLUG, we need the proper iconv_t type in order to produce
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binary compatible code.
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But gcc's #include_next is not portable. Thus, once libiconv's iconv.h
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has been installed in /usr/local/include, there is no way any more to
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include the original /usr/include/iconv.h. We simply have to get away
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without it.
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Ad 1. The risk that a system header file does
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#include "iconv.h" or #include_next "iconv.h"
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is small. They all do #include <iconv.h>.
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Ad 2. The iconv_t type is a pointer type in all cases I have seen. (It
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has to be a scalar type because (iconv_t)(-1) is a possible return value
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from iconv_open().) */
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/* Define iconv_t ourselves. */
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#undef iconv_t
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#define iconv_t libiconv_t
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typedef void* iconv_t;
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/* Get size_t declaration.
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Get wchar_t declaration if it exists. */
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#include <stddef.h>
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/* Get errno declaration and values. */
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#include <errno.h>
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/* Some systems, like SunOS 4, don't have EILSEQ. Some systems, like BSD/OS,
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have EILSEQ in a different header. On these systems, define EILSEQ
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ourselves. */
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#ifndef EILSEQ
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#define EILSEQ
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Allocates descriptor for code conversion from encoding ‘fromcode’ to
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encoding ‘tocode’. */
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#ifndef LIBICONV_PLUG
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#define iconv_open libiconv_open
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#endif
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extern iconv_t iconv_open (const char* tocode, const char* fromcode);
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/* Converts, using conversion descriptor ‘cd’, at most ‘*inbytesleft’ bytes
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starting at ‘*inbuf’, writing at most ‘*outbytesleft’ bytes starting at
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‘*outbuf’.
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Decrements ‘*inbytesleft’ and increments ‘*inbuf’ by the same amount.
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Decrements ‘*outbytesleft’ and increments ‘*outbuf’ by the same amount. */
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#ifndef LIBICONV_PLUG
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#define iconv libiconv
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#endif
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extern size_t iconv (iconv_t cd, char* * inbuf, size_t *inbytesleft, char* * outbuf, size_t *outbytesleft);
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/* Frees resources allocated for conversion descriptor ‘cd’. */
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#ifndef LIBICONV_PLUG
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#define iconv_close libiconv_close
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#endif
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extern int iconv_close (iconv_t cd);
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#ifdef __cplusplus
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}
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#endif
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#ifndef LIBICONV_PLUG
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/* Nonstandard extensions. */
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#if 1
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#if 0
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#endif
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#include <wchar.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* A type that holds all memory needed by a conversion descriptor.
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A pointer to such an object can be used as an iconv_t. */
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typedef struct {
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void* dummy1[28];
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#if 1
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mbstate_t dummy2;
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#endif
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} iconv_allocation_t;
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/* Allocates descriptor for code conversion from encoding ‘fromcode’ to
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encoding ‘tocode’ into preallocated memory. Returns an error indicator
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(0 or -1 with errno set). */
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#define iconv_open_into libiconv_open_into
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extern int iconv_open_into (const char* tocode, const char* fromcode,
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iconv_allocation_t* resultp);
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/* Control of attributes. */
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#define iconvctl libiconvctl
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extern int iconvctl (iconv_t cd, int request, void* argument);
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/* Hook performed after every successful conversion of a Unicode character. */
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typedef void (*iconv_unicode_char_hook) (unsigned int uc, void* data);
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/* Hook performed after every successful conversion of a wide character. */
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typedef void (*iconv_wide_char_hook) (wchar_t wc, void* data);
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/* Set of hooks. */
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struct iconv_hooks {
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iconv_unicode_char_hook uc_hook;
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iconv_wide_char_hook wc_hook;
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void* data;
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};
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/* Fallback function. Invoked when a small number of bytes could not be
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converted to a Unicode character. This function should process all
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bytes from inbuf and may produce replacement Unicode characters by calling
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the write_replacement callback repeatedly. */
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typedef void (*iconv_unicode_mb_to_uc_fallback)
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(const char* inbuf, size_t inbufsize,
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void (*write_replacement) (const unsigned int *buf, size_t buflen,
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void* callback_arg),
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void* callback_arg,
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void* data);
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/* Fallback function. Invoked when a Unicode character could not be converted
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to the target encoding. This function should process the character and
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may produce replacement bytes (in the target encoding) by calling the
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write_replacement callback repeatedly. */
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typedef void (*iconv_unicode_uc_to_mb_fallback)
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(unsigned int code,
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void (*write_replacement) (const char *buf, size_t buflen,
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void* callback_arg),
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void* callback_arg,
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void* data);
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#if 1
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/* Fallback function. Invoked when a number of bytes could not be converted to
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a wide character. This function should process all bytes from inbuf and may
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produce replacement wide characters by calling the write_replacement
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callback repeatedly. */
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typedef void (*iconv_wchar_mb_to_wc_fallback)
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(const char* inbuf, size_t inbufsize,
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void (*write_replacement) (const wchar_t *buf, size_t buflen,
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void* callback_arg),
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void* callback_arg,
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void* data);
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/* Fallback function. Invoked when a wide character could not be converted to
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the target encoding. This function should process the character and may
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produce replacement bytes (in the target encoding) by calling the
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write_replacement callback repeatedly. */
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typedef void (*iconv_wchar_wc_to_mb_fallback)
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(wchar_t code,
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void (*write_replacement) (const char *buf, size_t buflen,
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void* callback_arg),
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void* callback_arg,
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void* data);
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#else
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/* If the wchar_t type does not exist, these two fallback functions are never
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invoked. Their argument list therefore does not matter. */
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typedef void (*iconv_wchar_mb_to_wc_fallback) ();
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typedef void (*iconv_wchar_wc_to_mb_fallback) ();
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#endif
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/* Set of fallbacks. */
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struct iconv_fallbacks {
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iconv_unicode_mb_to_uc_fallback mb_to_uc_fallback;
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iconv_unicode_uc_to_mb_fallback uc_to_mb_fallback;
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iconv_wchar_mb_to_wc_fallback mb_to_wc_fallback;
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iconv_wchar_wc_to_mb_fallback wc_to_mb_fallback;
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void* data;
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};
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/* Requests for iconvctl. */
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#define ICONV_TRIVIALP 0 /* int *argument */
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#define ICONV_GET_TRANSLITERATE 1 /* int *argument */
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#define ICONV_SET_TRANSLITERATE 2 /* const int *argument */
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#define ICONV_GET_DISCARD_ILSEQ 3 /* int *argument */
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#define ICONV_SET_DISCARD_ILSEQ 4 /* const int *argument */
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#define ICONV_SET_HOOKS 5 /* const struct iconv_hooks *argument */
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#define ICONV_SET_FALLBACKS 6 /* const struct iconv_fallbacks *argument */
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/* Listing of locale independent encodings. */
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#define iconvlist libiconvlist
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extern void iconvlist (int (*do_one) (unsigned int namescount,
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const char * const * names,
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void* data),
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void* data);
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/* Canonicalize an encoding name.
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The result is either a canonical encoding name, or name itself. */
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extern const char * iconv_canonicalize (const char * name);
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/* Support for relocatable packages. */
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/* Sets the original and the current installation prefix of the package.
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Relocation simply replaces a pathname starting with the original prefix
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by the corresponding pathname with the current prefix instead. Both
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prefixes should be directory names without trailing slash (i.e. use ""
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instead of "/"). */
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extern void libiconv_set_relocation_prefix (const char *orig_prefix,
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const char *curr_prefix);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif /* _LIBICONV_H */
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