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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/********************************************************************
* COPYRIGHT:
* Copyright (c) 2008-2011, International Business Machines Corporation and
* others. All Rights Reserved.
********************************************************************/
//
// file: regextxt.cpp
//
// This file contains utility code for supporting UText in the regular expression engine.
//
#include "unicode/utf.h"
#include "regextxt.h"
U_NAMESPACE_BEGIN
U_CFUNC char16_t U_CALLCONV
uregex_utext_unescape_charAt(int32_t offset, void *ct) {
struct URegexUTextUnescapeCharContext *context = (struct URegexUTextUnescapeCharContext *)ct;
UChar32 c;
if (offset == context->lastOffset + 1) {
c = UTEXT_NEXT32(context->text);
context->lastOffset++;
} else if (offset == context->lastOffset) {
c = UTEXT_PREVIOUS32(context->text);
UTEXT_NEXT32(context->text);
} else {
utext_moveIndex32(context->text, offset - context->lastOffset - 1);
c = UTEXT_NEXT32(context->text);
context->lastOffset = offset;
}
// !!!: Doesn't handle characters outside BMP
if (U_IS_BMP(c)) {
return (char16_t)c;
} else {
return 0;
}
}
U_CFUNC char16_t U_CALLCONV
uregex_ucstr_unescape_charAt(int32_t offset, void *context) {
return ((char16_t *)context)[offset];
}
U_NAMESPACE_END
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