/* * MacGaelic codepage functions * * Copyright (C) 2008-2023, Joachim Metz * * Refer to AUTHORS for acknowledgements. * * This program 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 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see . */ #include #include #include "libuna_codepage_mac_gaelic.h" #include "libuna_libcerror.h" #include "libuna_types.h" /* Extended ASCII to Unicode character lookup table for the MacGaelic codepage * Unknown are filled with the Unicode replacement character 0xfffd */ const uint16_t libuna_codepage_mac_gaelic_byte_stream_to_unicode_base_0x80[ 128 ] = { 0x00c4, 0x00c5, 0x00c7, 0x00c9, 0x00d1, 0x00d6, 0x00dc, 0x00e1, 0x00e0, 0x00e2, 0x00e4, 0x00e3, 0x00e5, 0x00e7, 0x00e9, 0x00e8, 0x00ea, 0x00eb, 0x00ed, 0x00ec, 0x00ee, 0x00ef, 0x00f1, 0x00f3, 0x00f2, 0x00f4, 0x00f6, 0x00f5, 0x00fa, 0x00f9, 0x00fb, 0x00fc, 0x2020, 0x00b0, 0x00a2, 0x00a3, 0x00a7, 0x2022, 0x00b6, 0x00df, 0x00ae, 0x00a9, 0x2122, 0x00b4, 0x00a8, 0x2260, 0x00c6, 0x00d8, 0x1e02, 0x00b1, 0x2264, 0x2265, 0x1e03, 0x010a, 0x010b, 0x1e0a, 0x1e0b, 0x1e1e, 0x1e1f, 0x0120, 0x0121, 0x1e40, 0x00e6, 0x00f8, 0x1e41, 0x1e56, 0x1e57, 0x027c, 0x0192, 0x017f, 0x1e60, 0x00ab, 0x00bb, 0x2026, 0x00a0, 0x00c0, 0x00c3, 0x00d5, 0x0152, 0x0153, 0x2013, 0x2014, 0x201c, 0x201d, 0x2018, 0x2019, 0x1e61, 0x1e9b, 0x00ff, 0x0178, 0x1e6a, 0x20ac, 0x2039, 0x203a, 0x0176, 0x0177, 0x1e6b, 0x00b7, 0x1ef2, 0x1ef3, 0x204a, 0x00c2, 0x00ca, 0x00c1, 0x00cb, 0x00c8, 0x00cd, 0x00ce, 0x00cf, 0x00cc, 0x00d3, 0x00d4, 0x2663, 0x00d2, 0x00da, 0x00db, 0x00d9, 0x0131, 0x00dd, 0x00fd, 0x0174, 0x0175, 0x1e84, 0x1e85, 0x1e80, 0x1e81, 0x1e82, 0x1e83 }; /* Unicode to ASCII character lookup tables for the MacGaelic codepage * Unknown are filled with the ASCII replacement character 0x1a */ const uint8_t libuna_codepage_mac_gaelic_unicode_to_byte_stream_base_0x00a0[ 112 ] = { 0xca, 0x1a, 0xa2, 0xa3, 0x1a, 0x1a, 0x1a, 0xa4, 0xac, 0xa9, 0x1a, 0xc7, 0x1a, 0x1a, 0xa8, 0x1a, 0xa1, 0xb1, 0x1a, 0x1a, 0xab, 0x1a, 0xa6, 0xe1, 0x1a, 0x1a, 0x1a, 0xc8, 0x1a, 0x1a, 0x1a, 0x1a, 0xcb, 0xe7, 0xe5, 0xcc, 0x80, 0x81, 0xae, 0x82, 0xe9, 0x83, 0xe6, 0xe8, 0xed, 0xea, 0xeb, 0xec, 0x1a, 0x84, 0xf1, 0xee, 0xef, 0xcd, 0x85, 0x1a, 0xaf, 0xf4, 0xf2, 0xf3, 0x86, 0xf6, 0x1a, 0xa7, 0x88, 0x87, 0x89, 0x8b, 0x8a, 0x8c, 0xbe, 0x8d, 0x8f, 0x8e, 0x90, 0x91, 0x93, 0x92, 0x94, 0x95, 0x1a, 0x96, 0x98, 0x97, 0x99, 0x9b, 0x9a, 0x1a, 0xbf, 0x9d, 0x9c, 0x9e, 0x9f, 0xf7, 0x1a, 0xd8, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0x1a, 0xb5, 0xb6, 0x1a, 0x1a, 0x1a, 0x1a }; const uint8_t libuna_codepage_mac_gaelic_unicode_to_byte_stream_base_0x2010[ 24 ] = { 0x1a, 0x1a, 0x1a, 0xd0, 0xd1, 0x1a, 0x1a, 0x1a, 0xd4, 0xd5, 0x1a, 0x1a, 0xd2, 0xd3, 0x1a, 0x1a, 0xa0, 0x1a, 0xa5, 0x1a, 0x1a, 0x1a, 0xc9, 0x1a }; /* Copies an Unicode character from a MacGaelic encoded byte stream * Returns 1 if successful or -1 on error */ int libuna_codepage_mac_gaelic_copy_from_byte_stream( libuna_unicode_character_t *unicode_character, const uint8_t *byte_stream, size_t byte_stream_size, size_t *byte_stream_index, libcerror_error_t **error ) { static char *function = "libuna_codepage_mac_gaelic_copy_from_byte_stream"; libuna_unicode_character_t safe_unicode_character = 0xfffd; size_t safe_byte_stream_index = 0; uint8_t byte_stream_character = 0; if( unicode_character == NULL ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, "%s: invalid Unicode character.", function ); return( -1 ); } if( byte_stream == NULL ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, "%s: invalid byte stream.", function ); return( -1 ); } if( byte_stream_size > (size_t) SSIZE_MAX ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, "%s: invalid byte stream size value exceeds maximum.", function ); return( -1 ); } if( byte_stream_index == NULL ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, "%s: invalid byte stream index.", function ); return( -1 ); } safe_byte_stream_index = *byte_stream_index; if( safe_byte_stream_index >= byte_stream_size ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, "%s: byte stream too small.", function ); return( -1 ); } byte_stream_character = byte_stream[ safe_byte_stream_index++ ]; if( byte_stream_character < 0x80 ) { safe_unicode_character = byte_stream_character; } else { byte_stream_character -= 0x80; safe_unicode_character = libuna_codepage_mac_gaelic_byte_stream_to_unicode_base_0x80[ byte_stream_character ]; } *unicode_character = safe_unicode_character; *byte_stream_index = safe_byte_stream_index; return( 1 ); } /* Copies an Unicode character to a MacGaelic encoded byte stream * Returns 1 if successful or -1 on error */ int libuna_codepage_mac_gaelic_copy_to_byte_stream( libuna_unicode_character_t unicode_character, uint8_t *byte_stream, size_t byte_stream_size, size_t *byte_stream_index, libcerror_error_t **error ) { static char *function = "libuna_codepage_mac_gaelic_copy_to_byte_stream"; size_t safe_byte_stream_index = 0; uint16_t byte_stream_value = 0x001a; if( byte_stream == NULL ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, "%s: invalid byte stream.", function ); return( -1 ); } if( byte_stream_size > (size_t) SSIZE_MAX ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, "%s: invalid byte stream size value exceeds maximum.", function ); return( -1 ); } if( byte_stream_index == NULL ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, "%s: invalid byte stream index.", function ); return( -1 ); } safe_byte_stream_index = *byte_stream_index; if( safe_byte_stream_index >= byte_stream_size ) { libcerror_error_set( error, LIBCERROR_ERROR_DOMAIN_ARGUMENTS, LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, "%s: byte stream too small.", function ); return( -1 ); } if( unicode_character < 0x0080 ) { byte_stream_value = (uint16_t) unicode_character; } else if( ( unicode_character >= 0x00a0 ) && ( unicode_character < 0x0110 ) ) { unicode_character -= 0x00a0; byte_stream_value = libuna_codepage_mac_gaelic_unicode_to_byte_stream_base_0x00a0[ unicode_character ]; } else if( ( unicode_character >= 0x2010 ) && ( unicode_character < 0x2028 ) ) { unicode_character -= 0x2010; byte_stream_value = libuna_codepage_mac_gaelic_unicode_to_byte_stream_base_0x2010[ unicode_character ]; } else switch( unicode_character ) { case 0x0120: byte_stream_value = 0xbb; break; case 0x0121: byte_stream_value = 0xbc; break; case 0x0131: byte_stream_value = 0xf5; break; case 0x0152: byte_stream_value = 0xce; break; case 0x0153: byte_stream_value = 0xcf; break; case 0x0174: byte_stream_value = 0xf8; break; case 0x0175: byte_stream_value = 0xf9; break; case 0x0176: byte_stream_value = 0xde; break; case 0x0177: byte_stream_value = 0xdf; break; case 0x0178: byte_stream_value = 0xd9; break; case 0x017f: byte_stream_value = 0xc5; break; case 0x0192: byte_stream_value = 0xc4; break; case 0x027c: byte_stream_value = 0xc3; break; case 0x1e02: byte_stream_value = 0xb0; break; case 0x1e03: byte_stream_value = 0xb4; break; case 0x1e0a: byte_stream_value = 0xb7; break; case 0x1e0b: byte_stream_value = 0xb8; break; case 0x1e1e: byte_stream_value = 0xb9; break; case 0x1e1f: byte_stream_value = 0xba; break; case 0x1e40: byte_stream_value = 0xbd; break; case 0x1e41: byte_stream_value = 0xc0; break; case 0x1e56: byte_stream_value = 0xc1; break; case 0x1e57: byte_stream_value = 0xc2; break; case 0x1e60: byte_stream_value = 0xc6; break; case 0x1e61: byte_stream_value = 0xd6; break; case 0x1e6a: byte_stream_value = 0xda; break; case 0x1e6b: byte_stream_value = 0xe0; break; case 0x1e80: byte_stream_value = 0xfc; break; case 0x1e81: byte_stream_value = 0xfd; break; case 0x1e82: byte_stream_value = 0xfe; break; case 0x1e83: byte_stream_value = 0xff; break; case 0x1e84: byte_stream_value = 0xfa; break; case 0x1e85: byte_stream_value = 0xfb; break; case 0x1e9b: byte_stream_value = 0xd7; break; case 0x1ef2: byte_stream_value = 0xe2; break; case 0x1ef3: byte_stream_value = 0xe3; break; case 0x2039: byte_stream_value = 0xdc; break; case 0x203a: byte_stream_value = 0xdd; break; case 0x204a: byte_stream_value = 0xe4; break; case 0x20ac: byte_stream_value = 0xdb; break; case 0x2122: byte_stream_value = 0xaa; break; case 0x2260: byte_stream_value = 0xad; break; case 0x2264: byte_stream_value = 0xb2; break; case 0x2265: byte_stream_value = 0xb3; break; case 0x2663: byte_stream_value = 0xf0; break; default: byte_stream_value = 0x1a; break; } byte_stream[ safe_byte_stream_index++ ] = (uint8_t) ( byte_stream_value & 0x00ff ); *byte_stream_index = safe_byte_stream_index; return( 1 ); }