mirror of https://github.com/odrling/Aegisub
58 lines
2.0 KiB
C#
58 lines
2.0 KiB
C#
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/*
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SSATool - A collection of utilities for Advanced Substation Alpha
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Copyright (C) 2007 Dan Donovan
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; ONLY under version 2
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace SSATool {
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public static class DetectEncoding {
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// This detection could use some serious improving.
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// All detection should return the occurances as an integer.
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public static int DetectSJIS(byte[] input) {
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int occ=0;
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byte lastMatched=0;
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byte thisbyte;
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for (int index=0;index!=input.Length;index++) {
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thisbyte = input[index];
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if ((lastMatched==130&&thisbyte>=159&&thisbyte<=241) ||
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(lastMatched==131&&thisbyte>=64&&thisbyte<=151)) occ++;
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else if (thisbyte==130||thisbyte==131||thisbyte>=136) lastMatched=thisbyte;
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else lastMatched=0;
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}
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return occ;
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}
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public static int DetectEUCJP(byte[] input) {
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int occ=0;
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byte lastMatched=0;
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byte thisbyte;
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for (int index=0;index!=input.Length;index++) {
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thisbyte = input[index];
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if (lastMatched>=163&&lastMatched<=250&&thisbyte>=160) occ++;
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else if (thisbyte>=163&&thisbyte<=250) lastMatched=thisbyte;
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else lastMatched=0;
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}
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return occ;
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}
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}
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}
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