452 lines
8.8 KiB
C
452 lines
8.8 KiB
C
/* Copyright (c) 2002 Red Hat Incorporated.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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FUNCTION
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<<towlower>>---translate wide characters to lowercase
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INDEX
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towlower
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ANSI_SYNOPSIS
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#include <wctype.h>
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wint_t towlower(wint_t <[c]>);
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TRAD_SYNOPSIS
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#include <wctype.h>
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wint_t towlower(<[c]>)
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wint_t <[c]>;
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DESCRIPTION
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<<towlower>> is a function which converts uppercase wide characters to
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lowercase, leaving all other characters unchanged.
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RETURNS
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<<towlower>> returns the lowercase equivalent of <[c]> when it is a
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uppercase wide character; otherwise, it returns the input character.
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PORTABILITY
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<<towlower>> is C99.
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No supporting OS subroutines are required.
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*/
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#include <_ansi.h>
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#include <newlib.h>
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#include <string.h>
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#include <reent.h>
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#include <ctype.h>
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#include <wctype.h>
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#include "local.h"
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wint_t
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_DEFUN(towlower,(c), wint_t c)
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{
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#ifdef _MB_CAPABLE
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c = _jp2uc (c);
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if (c < 0x100)
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{
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if ((c >= 0x0041 && c <= 0x005a) ||
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(c >= 0x00c0 && c <= 0x00de))
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return (c + 0x20);
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if (c == 0x00b5)
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return 0x03bc;
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return c;
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}
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else if (c < 0x300)
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{
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if ((c >= 0x0100 && c <= 0x012e) ||
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(c >= 0x0132 && c <= 0x0136) ||
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(c >= 0x014a && c <= 0x0176) ||
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(c >= 0x01de && c <= 0x01ee) ||
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(c >= 0x01f8 && c <= 0x021e) ||
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(c >= 0x0222 && c <= 0x0232))
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{
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if (!(c & 0x01))
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return (c + 1);
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return c;
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}
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if ((c >= 0x0139 && c <= 0x0147) ||
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(c >= 0x01cd && c <= 0x91db))
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{
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if (c & 0x01)
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return (c + 1);
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return c;
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}
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if (c >= 0x178 && c <= 0x01f7)
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{
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wint_t k;
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switch (c)
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{
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case 0x0178:
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k = 0x00ff;
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break;
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case 0x0179:
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case 0x017b:
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case 0x017d:
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case 0x0182:
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case 0x0184:
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case 0x0187:
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case 0x018b:
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case 0x0191:
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case 0x0198:
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case 0x01a0:
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case 0x01a2:
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case 0x01a4:
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case 0x01a7:
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case 0x01ac:
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case 0x01af:
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case 0x01b3:
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case 0x01b5:
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case 0x01b8:
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case 0x01bc:
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case 0x01c5:
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case 0x01c8:
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case 0x01cb:
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case 0x01cd:
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case 0x01cf:
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case 0x01d1:
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case 0x01d3:
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case 0x01d5:
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case 0x01d7:
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case 0x01d9:
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case 0x01db:
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case 0x01f2:
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case 0x01f4:
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k = c + 1;
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break;
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case 0x017f:
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k = 0x0073;
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break;
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case 0x0181:
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k = 0x0253;
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break;
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case 0x0186:
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k = 0x0254;
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break;
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case 0x0189:
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k = 0x0256;
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break;
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case 0x018a:
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k = 0x0257;
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break;
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case 0x018e:
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k = 0x01dd;
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break;
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case 0x018f:
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k = 0x0259;
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break;
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case 0x0190:
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k = 0x025b;
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break;
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case 0x0193:
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k = 0x0260;
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break;
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case 0x0194:
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k = 0x0263;
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break;
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case 0x0196:
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k = 0x0269;
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break;
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case 0x0197:
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k = 0x0268;
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break;
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case 0x019c:
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k = 0x026f;
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break;
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case 0x019d:
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k = 0x0272;
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break;
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case 0x019f:
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k = 0x0275;
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break;
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case 0x01a6:
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k = 0x0280;
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break;
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case 0x01a9:
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k = 0x0283;
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break;
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case 0x01ae:
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k = 0x0288;
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break;
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case 0x01b1:
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k = 0x028a;
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break;
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case 0x01b2:
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k = 0x028b;
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break;
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case 0x01b7:
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k = 0x0292;
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break;
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case 0x01c4:
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case 0x01c7:
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case 0x01ca:
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case 0x01f1:
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k = c + 2;
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break;
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case 0x01f6:
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k = 0x0195;
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break;
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case 0x01f7:
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k = 0x01bf;
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break;
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default:
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k = 0;
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}
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if (k != 0)
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return k;
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}
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if (c == 0x0220)
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return 0x019e;
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}
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else if (c < 0x0400)
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{
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if (c >= 0x0391 && c <= 0x03ab && c != 0x03a2)
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return (c + 0x20);
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if (c >= 0x03d8 && c <= 0x03ee && !(c & 0x01))
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return (c + 1);
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if (c >= 0x0386 && c <= 0x03f5)
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{
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wint_t k;
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switch (c)
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{
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case 0x0386:
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k = 0x03ac;
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break;
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case 0x0388:
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k = 0x03ad;
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break;
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case 0x0389:
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k = 0x03ae;
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break;
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case 0x038a:
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k = 0x03af;
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break;
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case 0x038c:
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k = 0x03cc;
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break;
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case 0x038e:
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k = 0x03cd;
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break;
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case 0x038f:
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k = 0x038f;
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break;
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case 0x03c2:
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k = 0x03c3;
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break;
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case 0x03d0:
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k = 0x03b2;
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break;
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case 0x03d1:
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k = 0x03b8;
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break;
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case 0x03d5:
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k = 0x03c6;
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break;
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case 0x03d6:
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k = 0x03c0;
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break;
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case 0x03f0:
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k = 0x03ba;
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break;
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case 0x03f1:
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k = 0x03c1;
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break;
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case 0x03f2:
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k = 0x03c3;
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break;
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case 0x03f4:
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k = 0x03b8;
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break;
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case 0x03f5:
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k = 0x03b5;
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break;
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default:
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k = 0;
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}
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if (k != 0)
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return k;
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}
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if (c == 0x0345)
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return 0x03b9;
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}
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else if (c < 0x500)
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{
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if (c >= 0x0400 && c <= 0x040f)
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return (c + 0x50);
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if (c >= 0x0410 && c <= 0x042f)
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return (c + 0x20);
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if ((c >= 0x0460 && c <= 0x0480) ||
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(c >= 0x048a && c <= 0x04be) ||
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(c >= 0x04d0 && c <= 0x04f4) ||
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(c == 0x04f8))
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{
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if (!(c & 0x01))
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return (c + 1);
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return c;
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}
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if (c >= 0x04c1 && c <= 0x04cd)
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{
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if (c & 0x01)
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return (c + 1);
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return c;
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}
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}
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else if (c < 0x1f00)
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{
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if ((c >= 0x0500 && c <= 0x050e) ||
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(c >= 0x1e00 && c <= 0x1e94) ||
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(c >= 0x1ea0 && c <= 0x1ef8))
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{
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if (!(c & 0x01))
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return (c + 1);
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return c;
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}
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if (c >= 0x0531 && c <= 0x0556)
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return (c + 0x30);
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if (c == 0x1e9b)
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return 0x1e61;
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}
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else if (c < 0x2000)
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{
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if ((c >= 0x1f08 && c <= 0x1f0f) ||
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(c >= 0x1f18 && c <= 0x1f1d) ||
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(c >= 0x1f28 && c <= 0x1f2f) ||
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(c >= 0x1f38 && c <= 0x1f3f) ||
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(c >= 0x1f48 && c <= 0x1f4d) ||
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(c >= 0x1f68 && c <= 0x1f6f) ||
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(c >= 0x1f88 && c <= 0x1f8f) ||
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(c >= 0x1f98 && c <= 0x1f9f) ||
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(c >= 0x1fa8 && c <= 0x1faf))
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return (c - 0x08);
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if (c >= 0x1f59 && c <= 0x1f5f)
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{
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if (c & 0x01)
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return (c - 0x08);
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return c;
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}
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if (c >= 0x1fb8 && c <= 0x1ffc)
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{
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wint_t k;
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switch (c)
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{
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case 0x1fb8:
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case 0x1fb9:
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case 0x1fd8:
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case 0x1fd9:
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case 0x1fe8:
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case 0x1fe9:
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k = c - 0x08;
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break;
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case 0x1fba:
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case 0x1fbb:
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k = c - 0x4a;
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break;
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case 0x1fbc:
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k = 0x1fb3;
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break;
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case 0x1fbe:
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k = 0x03b9;
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break;
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case 0x1fc8:
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case 0x1fc9:
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case 0x1fca:
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case 0x1fcb:
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k = c - 0x56;
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break;
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case 0x1fcc:
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k = 0x1fc3;
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break;
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case 0x1fda:
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case 0x1fdb:
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k = c - 0x64;
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break;
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case 0x1fea:
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case 0x1feb:
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k = c - 0x70;
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break;
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case 0x1fec:
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k = 0x1fe5;
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break;
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case 0x1ffa:
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case 0x1ffb:
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k = c - 0x7e;
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break;
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case 0x1ffc:
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k = 0x1ff3;
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break;
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default:
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k = 0;
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}
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if (k != 0)
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return k;
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}
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}
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else
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{
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if (c >= 0x2160 && c <= 0x216f)
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return (c + 0x10);
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if (c >= 0x24b6 && c <= 0x24cf)
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return (c + 0x1a);
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if (c >= 0xff21 && c <= 0xff3a)
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return (c + 0x20);
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if (c >= 0x10400 && c <= 0x10425)
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return (c + 0x28);
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if (c == 0x2126)
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return 0x03c9;
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if (c == 0x212a)
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return 0x006b;
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if (c == 0x212b)
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return 0x00e5;
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}
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return c;
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#else
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return (c < 0x00ff ? (wint_t)(tolower ((int)c)) : c);
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#endif /* _MB_CAPABLE */
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}
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