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-rw-r--r--src/modules/filters/utf8bidireorder.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/modules/filters/utf8bidireorder.cpp b/src/modules/filters/utf8bidireorder.cpp
new file mode 100644
index 0000000..8fa7280
--- /dev/null
+++ b/src/modules/filters/utf8bidireorder.cpp
@@ -0,0 +1,55 @@
+/******************************************************************************
+*
+* utf8cnormalizer - SWFilter decendant to perform reordering of UTF-8
+* text to visual order according to Unicode BiDi
+*/
+
+#ifdef _ICU_
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __GNUC__
+#include <unixstr.h>
+#endif
+
+#include <utf8bidireorder.h>
+
+UTF8BiDiReorder::UTF8BiDiReorder() {
+
+ conv = ucnv_open("UTF-8", &err);
+
+}
+
+UTF8BiDiReorder::~UTF8BiDiReorder() {
+ ucnv_close(conv);
+}
+
+char UTF8BiDiReorder::ProcessText(char *text, int maxlen, const SWKey *key, const SWModule *module)
+{
+ UChar *ustr, *ustr2;
+
+ int32_t len = strlen(text);
+ ustr = new UChar[len]; //each char could become a surrogate pair
+
+ // Convert UTF-8 string to UTF-16 (UChars)
+ len = ucnv_toUChars(conv, ustr, len, text, -1, &err);
+ ustr2 = new UChar[len];
+
+ UBiDi* bidi = ubidi_openSized(len + 1, 0, &err);
+ ubidi_setPara(bidi, ustr, len, UBIDI_DEFAULT_RTL, NULL, &err);
+ len = ubidi_writeReordered(bidi, ustr2, len,
+ UBIDI_DO_MIRRORING | UBIDI_REMOVE_BIDI_CONTROLS, &err);
+ ubidi_close(bidi);
+
+// len = ubidi_writeReverse(ustr, len, ustr2, len,
+// UBIDI_DO_MIRRORING | UBIDI_REMOVE_BIDI_CONTROLS, &err);
+
+ ucnv_fromUChars(conv, text, maxlen, ustr2, len, &err);
+
+ delete [] ustr2;
+ delete [] ustr;
+ return 0;
+}
+
+#endif