diff options
Diffstat (limited to 'source/StringUtils.cpp')
| -rw-r--r-- | source/StringUtils.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/source/StringUtils.cpp b/source/StringUtils.cpp index fa61a61e7..ccdbe687a 100644 --- a/source/StringUtils.cpp +++ b/source/StringUtils.cpp @@ -233,3 +233,49 @@ AStringList GetDirectoryContents(const char * a_Directory) + +// Converts a stream of BE shorts into UTF-8 string; returns a ref to a_UTF8 +AString & RawBEToUTF8(short * a_RawData, int a_NumShorts, AString & a_UTF8) +{ + a_UTF8.clear(); + a_UTF8.reserve(3 * a_NumShorts / 2); // a quick guess of the resulting size + for (int i = 0; i < a_NumShorts; i++) + { + int c = ntohs(*(a_RawData + i)); + if (c < 0x80) + { + a_UTF8.push_back((char)c); + } + else if (c < 0x800) + { + a_UTF8.push_back((char)(192 + c / 64)); + a_UTF8.push_back((char)(128 + c % 64)); + } + else if (c - 0xd800u < 0x800) + { + // Error, silently drop + } + else if (c < 0x10000) + { + a_UTF8.push_back((char)(224 + c / 4096)); + a_UTF8.push_back((char)(128 + c / 64 % 64)); + a_UTF8.push_back((char)(128 + c % 64)); + } + else if (c < 0x110000) + { + a_UTF8.push_back((char)(240 + c / 262144)); + a_UTF8.push_back((char)(128 + c / 4096 % 64)); + a_UTF8.push_back((char)(128 + c / 64 % 64)); + a_UTF8.push_back((char)(128 + c % 64)); + } + else + { + // Error, silently drop + } + } + return a_UTF8; +} + + + + |