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Diffstat (limited to 'iso88598.cc')
| -rw-r--r-- | iso88598.cc | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/iso88598.cc b/iso88598.cc new file mode 100644 index 0000000..717a4cb --- /dev/null +++ b/iso88598.cc @@ -0,0 +1,111 @@ +// Copyright (C) 2003 Mooffie <mooffie@typo.co.il> +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 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 General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. + +#include <config.h> + +#include "iso88598.h" + +#include "univalues.h" + +#define ISO88598_HEB_ALEF 0xE0 +#define ISO88598_HEB_TAV 0xFA + +// The following 7 codes were taken from FriBiDi's fribidi_char_sets_iso8859_8.c. +// These are "proposed extensions to ISO-8859-8." + +#define ISO88598_LRM 0xFD +#define ISO88598_RLM 0xFE +#define ISO88598_LRE 0xFB +#define ISO88598_RLE 0xFC +#define ISO88598_PDF 0xDD +#define ISO88598_LRO 0xDB +#define ISO88598_RLO 0xDC + + +// int unicode_to_iso88598(unichar ch) +// +// This is a fallback function used for saving files when no iconv +// implementation is present. +// +// It returns EOF when the unicode character can't be represented in +// ISO-8859-9. + +int unicode_to_iso88598(unichar ch) +{ + if (ch <= 0xA0) + return ch; + if (ch >= UNI_HEB_ALEF && ch <= UNI_HEB_TAV) + return ISO88598_HEB_ALEF + (ch - UNI_HEB_ALEF); + switch (ch) { + case 0x00D7: return 0xAA; // MULTIPLICATION SIGN + case 0x00F7: return 0xBA; // DIVISION SIGN + case 0x2017: return 0xDF; // DOUBLE LOW LINE + } + if (ch >= 0xA2 && ch <= 0xBE) + return ch; + + // The following are non-standard conversions. + + switch (ch) { + case UNI_LRM: return ISO88598_LRM; + case UNI_RLM: return ISO88598_RLM; + case UNI_LRE: return ISO88598_LRE; + case UNI_RLE: return ISO88598_RLE; + case UNI_PDF: return ISO88598_PDF; + case UNI_LRO: return ISO88598_LRO; + case UNI_RLO: return ISO88598_RLO; + } + + return EOF; +} + +// unichar iso88598_to_unicode(unsigned char ch) +// +// This is a fallback function used for loading files when no iconv +// implementation is present. +// +// It returns the Unicode Replacement Character when it encounters a +// character which is illegal in ISO-8859-9. + +unichar iso88598_to_unicode(unsigned char ch) +{ + if (ch <= 0xA0) + return ch; + if (ch >= ISO88598_HEB_ALEF && ch <= ISO88598_HEB_TAV) + return UNI_HEB_ALEF + (ch - ISO88598_HEB_ALEF); + switch (ch) { + case 0xAA: return 0x00D7; // MULTIPLICATION SIGN + case 0xBA: return 0x00F7; // DIVISION SIGN + case 0xDF: return 0x2017; // DOUBLE LOW LINE + } + if (ch >= 0xA2 && ch <= 0xBE) + return ch; + + // The following are non-standard conversions. + + switch (ch) { + case ISO88598_LRM: return UNI_LRM; + case ISO88598_RLM: return UNI_RLM; + case ISO88598_LRE: return UNI_LRE; + case ISO88598_RLE: return UNI_RLE; + case ISO88598_PDF: return UNI_PDF; + case ISO88598_LRO: return UNI_LRO; + case ISO88598_RLO: return UNI_RLO; + } + + return UNI_REPLACEMENT; +} + |