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Editing: gconv.h
/* Copyright (C) 1997-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ /* This header provides no interface for a user to the internals of the gconv implementation in the libc. Therefore there is no use for these definitions beside for writing additional gconv modules. */ #ifndef _GCONV_H #define _GCONV_H 1 #include <features.h> #include <bits/types/__mbstate_t.h> #include <bits/types/wint_t.h> #define __need_size_t #define __need_wchar_t #include <stddef.h> /* ISO 10646 value used to signal invalid value. */ #define __UNKNOWN_10646_CHAR ((wchar_t) 0xfffd) /* Error codes for gconv functions. */ enum { __GCONV_OK = 0, __GCONV_NOCONV, __GCONV_NODB, __GCONV_NOMEM, __GCONV_EMPTY_INPUT, __GCONV_FULL_OUTPUT, __GCONV_ILLEGAL_INPUT, __GCONV_INCOMPLETE_INPUT, __GCONV_ILLEGAL_DESCRIPTOR, __GCONV_INTERNAL_ERROR }; /* Flags the `__gconv_open' function can set. */ enum { __GCONV_IS_LAST = 0x0001, __GCONV_IGNORE_ERRORS = 0x0002, __GCONV_SWAP = 0x0004, __GCONV_TRANSLIT = 0x0008 }; /* Forward declarations. */ struct __gconv_step; struct __gconv_step_data; struct __gconv_loaded_object; /* Type of a conversion function. */ typedef int (*__gconv_fct) (struct __gconv_step *, struct __gconv_step_data *, const unsigned char **, const unsigned char *, unsigned char **, size_t *, int, int); /* Type of a specialized conversion function for a single byte to INTERNAL. */ typedef wint_t (*__gconv_btowc_fct) (struct __gconv_step *, unsigned char); /* Constructor and destructor for local data for conversion step. */ typedef int (*__gconv_init_fct) (struct __gconv_step *); typedef void (*__gconv_end_fct) (struct __gconv_step *); /* Description of a conversion step. */ struct __gconv_step { struct __gconv_loaded_object *__shlib_handle; const char *__modname; /* For internal use by glibc. (Accesses to this member must occur when the internal __gconv_lock mutex is acquired). */ int __counter; char *__from_name; char *__to_name; __gconv_fct __fct; __gconv_btowc_fct __btowc_fct; __gconv_init_fct __init_fct; __gconv_end_fct __end_fct; /* Information about the number of bytes needed or produced in this step. This helps optimizing the buffer sizes. */ int __min_needed_from; int __max_needed_from; int __min_needed_to; int __max_needed_to; /* Flag whether this is a stateful encoding or not. */ int __stateful; void *__data; /* Pointer to step-local data. */ }; /* Additional data for steps in use of conversion descriptor. This is allocated by the `init' function. */ struct __gconv_step_data { unsigned char *__outbuf; /* Output buffer for this step. */ unsigned char *__outbufend; /* Address of first byte after the output buffer. */ /* Is this the last module in the chain. */ int __flags; /* Counter for number of invocations of the module function for this descriptor. */ int __invocation_counter; /* Flag whether this is an internal use of the module (in the mb*towc* and wc*tomb* functions) or regular with iconv(3). */ int __internal_use; __mbstate_t *__statep; __mbstate_t __state; /* This element must not be used directly by any module; always use STATEP! */ }; /* Combine conversion step description with data. */ typedef struct __gconv_info { size_t __nsteps; struct __gconv_step *__steps; __extension__ struct __gconv_step_data __data[0]; } *__gconv_t; #endif /* gconv.h */
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