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1998-04-21 19:05 Ulrich Drepper <drepper@cygnus.com> * iconv/gconv.h (struct gconv_step): Add element stateful. * iconv/gconv_builtin.c (__gconv_builtin_trans): Initialize stateful to zero for all internal conversions. * iconv/skeleton.c: Initialize stateful depending on whether or not RESET_STATE is defined to one or zero respectively. * stdlib/mblen.c: Use stateful element of currently selected converter for result if S is NULL. * stdlib/mbtowc.c: Likewise. * stdlib/wctomb.c: Likewise.
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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/* This header provides no interface for a user to the internals of
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the gconv implementation in the libc. Therefore there is no use
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for these definitions beside for writing additional gconv modules. */
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#ifndef _GCONV_H
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#define _GCONV_H 1
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#include <features.h>
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#include <wchar.h>
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#define __need_size_t
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#include <stddef.h>
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/* ISO 10646 value used to signal invalid value. */
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#define UNKNOWN_10646_CHAR ((wchar_t) 0xfffd)
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/* Error codes for gconv functions. */
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enum
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{
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GCONV_OK = 0,
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GCONV_NOCONV,
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GCONV_NODB,
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GCONV_NOMEM,
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GCONV_EMPTY_INPUT,
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GCONV_FULL_OUTPUT,
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GCONV_ILLEGAL_INPUT,
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GCONV_INCOMPLETE_INPUT,
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GCONV_ILLEGAL_DESCRIPTOR,
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GCONV_INTERNAL_ERROR
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};
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/* Forward declarations. */
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struct gconv_step;
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struct gconv_step_data;
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struct gconv_loaded_object;
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/* Type of a conversion function. */
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typedef int (*gconv_fct) __P ((struct gconv_step *,
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struct gconv_step_data *, __const char **,
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__const char *, size_t *, int));
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/* Constructor and destructor for local data for conversion step. */
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typedef int (*gconv_init_fct) __P ((struct gconv_step *));
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typedef void (*gconv_end_fct) __P ((struct gconv_step *));
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/* Description of a conversion step. */
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struct gconv_step
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{
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struct gconv_loaded_object *shlib_handle;
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const char *modname;
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int counter;
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__const char *from_name;
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__const char *to_name;
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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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/* Information about the number of bytes needed or produced in this
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step. This helps optimizing the buffer sizes. */
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int min_needed_from;
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int max_needed_from;
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int min_needed_to;
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int max_needed_to;
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/* Flag whether this is a stateful encoding or not. */
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int stateful;
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void *data; /* Pointer to step-local data. */
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};
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/* Additional data for steps in use of conversion descriptor. This is
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allocated by the `init' function. */
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struct gconv_step_data
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{
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char *outbuf; /* Output buffer for this step. */
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char *outbufend; /* Address of first byte after the output buffer. */
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int is_last;
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mbstate_t *statep;
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mbstate_t __state; /* This element should not be used directly by
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any module; always use STATEP! */
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};
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/* Combine conversion step description with data. */
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typedef struct gconv_info
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{
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size_t nsteps;
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struct gconv_step *steps;
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struct gconv_step_data *data;
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} *gconv_t;
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#endif /* gconv.h */
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