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-rw-r--r--intl/icu/source/i18n/regextxt.cpp48
1 files changed, 48 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/regextxt.cpp b/intl/icu/source/i18n/regextxt.cpp
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+++ b/intl/icu/source/i18n/regextxt.cpp
@@ -0,0 +1,48 @@
+// © 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