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Diffstat (limited to 'src/modules/filters/utf8nfkd.cpp')
-rw-r--r-- | src/modules/filters/utf8nfkd.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/modules/filters/utf8nfkd.cpp b/src/modules/filters/utf8nfkd.cpp new file mode 100644 index 0000000..a19d36b --- /dev/null +++ b/src/modules/filters/utf8nfkd.cpp @@ -0,0 +1,52 @@ +/****************************************************************************** +* +* utf8nfkd - SWFilter descendant to perform NFKD (compatability decomposition +* normalization) on UTF-8 text +*/ + +#ifdef _ICU_ + +#include <stdlib.h> + +#include <utilstr.h> + +#include <utf8nfkd.h> +#include <swbuf.h> + +SWORD_NAMESPACE_START + +UTF8NFKD::UTF8NFKD() { + conv = ucnv_open("UTF-8", &err); +} + +UTF8NFKD::~UTF8NFKD() { + ucnv_close(conv); +} + +char UTF8NFKD::processText(SWBuf &text, const SWKey *key, const SWModule *module) +{ + if ((unsigned long)key < 2) // hack, we're en(1)/de(0)ciphering + return -1; + + int32_t len = 5 + text.length() * 5; + source = new UChar[len + 1]; //each char could become a surrogate pair + + // Convert UTF-8 string to UTF-16 (UChars) + int32_t ulen = ucnv_toUChars(conv, source, len, text.c_str(), -1, &err); + target = new UChar[len + 1]; + + //compatability decomposition + ulen = unorm_normalize(source, ulen, UNORM_NFKD, 0, target, len, &err); + + text.setSize(len); + len = ucnv_fromUChars(conv, text.getRawData(), len, target, ulen, &err); + text.setSize(len); + + delete [] source; + delete [] target; + + return 0; +} + +SWORD_NAMESPACE_END +#endif |