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49 lines
1.4 KiB
49 lines
1.4 KiB
4 months ago
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/********************************************************************
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* COPYRIGHT:
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* Copyright (c) 2008-2011, International Business Machines Corporation and
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* others. All Rights Reserved.
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********************************************************************/
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//
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// file: regextxt.cpp
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//
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// This file contains utility code for supporting UText in the regular expression engine.
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//
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#include "unicode/utf.h"
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#include "regextxt.h"
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U_NAMESPACE_BEGIN
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U_CFUNC UChar U_CALLCONV
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uregex_utext_unescape_charAt(int32_t offset, void *ct) {
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struct URegexUTextUnescapeCharContext *context = (struct URegexUTextUnescapeCharContext *)ct;
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UChar32 c;
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if (offset == context->lastOffset + 1) {
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c = UTEXT_NEXT32(context->text);
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context->lastOffset++;
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} else if (offset == context->lastOffset) {
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c = UTEXT_PREVIOUS32(context->text);
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UTEXT_NEXT32(context->text);
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} else {
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utext_moveIndex32(context->text, offset - context->lastOffset - 1);
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c = UTEXT_NEXT32(context->text);
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context->lastOffset = offset;
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}
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// !!!: Doesn't handle characters outside BMP
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if (U_IS_BMP(c)) {
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return (UChar)c;
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} else {
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return 0;
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}
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}
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U_CFUNC UChar U_CALLCONV
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uregex_ucstr_unescape_charAt(int32_t offset, void *context) {
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return ((UChar *)context)[offset];
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}
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U_NAMESPACE_END
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