/*[
* Copyright 2018   Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code.  Modifications are to
* be distributed as patches to the released version.  Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
*   1. distribute the corresponding source modifications from the
*    released version in the form of a patch file along with the binaries,
*   2. add special version identification to distinguish your version
*    in addition to the base release version number,
*   3. provide your name and address as the primary contact for the
*    support of your modified version, and
*   4. retain our contact information in regard to use of the base
*    software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/

#ifndef GNUPLOT_ENCODING_H
#define GNUPLOT_ENCODING_H

#include "term_api.h"

void init_encoding(void);
enum set_encoding_id encoding_from_locale(void);
void init_special_chars(void);

const char * iconv_encoding_name(enum set_encoding_id encoding);
const char * latex_input_encoding(enum set_encoding_id encoding);

TBOOLEAN contains8bit(const char *s);

TBOOLEAN utf8toulong(unsigned long * wch, const char ** str);
int ucs4toutf8(uint32_t codepoint, unsigned char *utf8char);
size_t strlen_utf8(const char *s);
void truncate_to_one_utf8_char(char *orig);

TBOOLEAN is_sjis_lead_byte(char c);
size_t strlen_sjis(const char *s);

#define advance_one_utf8_char(utf8str) \
    do { \
	if ((*utf8str & 0x80) == 0x00) \
	    utf8str += 1; \
	else if ((*utf8str & 0xe0) == 0xc0) \
	    utf8str += 2; \
	else if ((*utf8str & 0xf0) == 0xe0) \
	    utf8str += 3; \
	else if ((*utf8str & 0xf8) == 0xf0) \
	    utf8str += 4; \
	else /* invalid utf8 sequence */ \
	    utf8str += 1; \
    } while (0)

#endif