static void write_string(WTF::Vector<char>& v, const WebCore::String& str)
{
unsigned strLen = str.length();
// Only do work if the string has data.
if (strLen) {
// Determine how much to grow the vector. Use the worst case for utf8 to
// avoid reading the string twice. Add sizeof(unsigned) to hold the
// string length in utf8.
unsigned vectorLen = v.size() + sizeof(unsigned);
unsigned length = (strLen << 2) + vectorLen;
// Grow the vector. This will change the value of v.size() but we
// remember the original size above.
v.grow(length);
// Grab the position to write to.
char* data = v.begin() + vectorLen;
// Write the actual string
int l = SkUTF16_ToUTF8(str.characters(), strLen, data);
LOGV("Writing string %d %.*s", l, l, data);
// Go back and write the utf8 length. Subtract sizeof(unsigned) from
// data to get the position to write the length.
memcpy(data - sizeof(unsigned), (char*)&l, sizeof(unsigned));
// Shrink the internal state of the vector so we match what was
// actually written.
v.shrink(vectorLen + l);
} else
v.append((char*)&strLen, sizeof(unsigned));
}
