| /******************************************************************** |
| * 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 |
