OXYGENHUB
# 0adc2e74f5cf x16-emulator / src / iso_8859_15.c
1.7 KiB · C · last changed chore(): initial commit 16 days ago source blame history raw
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// Commander X16 Emulator
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// Copyright (c) 2019,2022 Michael Steil
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// All rights reserved. License: 2-clause BSD
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#include <stdint.h>
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#include <stdio.h>
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#include "utf8_encode.h"
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uint8_t
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iso8859_15_from_unicode(uint32_t c)
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{
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	// line feed -> carriage return
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	if (c == '\n') {
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		return '\r';
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	}
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	// translate Unicode characters not part of Latin-1 but part of Latin-15
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	switch (c) {
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		case 0x20ac: // '€'
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			return 0xa4;
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		case 0x160: // 'Š'
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			return 0xa6;
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		case 0x161: // 'š'
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			return 0xa8;
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		case 0x17d: // 'Ž'
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			return 0xb4;
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		case 0x17e: // 'ž'
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			return 0xb8;
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		case 0x152: // 'Œ'
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			return 0xbc;
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		case 0x153: // 'œ'
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			return 0xbd;
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		case 0x178: // 'Ÿ'
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			return 0xbe;
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	}
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	// remove Unicode characters part of Latin-1 but not part of Latin-15
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	switch (c) {
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		case 0xa4: // '¤'
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		case 0xa6: // '¦'
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		case 0xa8: // '¨'
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		case 0xb4: // '´'
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		case 0xb8: // '¸'
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		case 0xbc: // '¼'
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		case 0xbd: // '½'
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		case 0xbe: // '¾'
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			return '?';
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	}
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	// all other Unicode characters are also unsupported
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	if (c >= 256) {
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		return '?';
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	}
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	// everything else is Latin-15 already
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	return c;
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}
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uint32_t
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unicode_from_iso8859_15(uint8_t c)
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{
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	// translate Latin-15 characters not part of Latin-1
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	switch (c) {
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		case 0xa4:
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			return 0x20ac; // '€'
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		case 0xa6:
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			return 0x160; // 'Š'
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		case 0xa8:
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			return 0x161; // 'š'
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		case 0xb4:
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			return 0x17d; // 'Ž'
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		case 0xb8:
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			return 0x17e; // 'ž'
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		case 0xbc:
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			return 0x152; // 'Œ'
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		case 0xbd:
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			return 0x153; // 'œ'
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		case 0xbe:
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			return 0x178; // 'Ÿ'
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		default:
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			return c;
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	}
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}
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// converts the character to UTF-8 and prints it
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void
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print_iso8859_15_char(char c)
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{
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	char utf8[5];
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	utf8_encode(utf8, unicode_from_iso8859_15(c));
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	printf("%s", utf8);
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}