49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
// Copyright (C) 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 UChar 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 (UChar)c;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
U_CFUNC UChar U_CALLCONV
|
|
uregex_ucstr_unescape_charAt(int32_t offset, void *context) {
|
|
return ((UChar *)context)[offset];
|
|
}
|
|
|
|
U_NAMESPACE_END
|