158     size_t Tell() const { return is_->Tell(); }  in Tell()
170     // Detect encoding type with BOM or RFC 4627
172         // BOM (Byte Order Mark):  in DetectType()
173         // 00 00 FE FF  UTF-32BE  in DetectType()
174         // FF FE 00 00  UTF-32LE  in DetectType()
175         // FE FF        UTF-16BE  in DetectType()
176         // FF FE        UTF-16LE  in DetectType()
177         // EF BB BF     UTF-8  in DetectType()
179         const unsigned char* c = reinterpret_cast<const unsigned char *>(is_->Peek4());  in DetectType()
183         unsigned bom = static_cast<unsigned>(c[0] | (c[1] << 8) | (c[2] << 16) | (c[3] << 24));  in DetectType()  local
185 …if (bom == 0xFFFE0000)                  { type_ = kUTF32BE; hasBOM_ = true; is_->Take(); is_->Take…  in DetectType()
186 …else if (bom == 0x0000FEFF)             { type_ = kUTF32LE; hasBOM_ = true; is_->Take(); is_->Take…  in DetectType()
187 …else if ((bom & 0xFFFF) == 0xFFFE)      { type_ = kUTF16BE; hasBOM_ = true; is_->Take(); is_->Take…  in DetectType()
188 …else if ((bom & 0xFFFF) == 0xFEFF)      { type_ = kUTF16LE; hasBOM_ = true; is_->Take(); is_->Take…  in DetectType()
189 …else if ((bom & 0xFFFFFF) == 0xBFBBEF)  { type_ = kUTF8;    hasBOM_ = true; is_->Take(); is_->Take…  in DetectType()
194         // stream is UTF-8, UTF-16 (BE or LE), or UTF-32 (BE or LE) by looking  in DetectType()
196         // 00 00 00 xx  UTF-32BE  in DetectType()
197         // 00 xx 00 xx  UTF-16BE  in DetectType()
198         // xx 00 00 00  UTF-32LE  in DetectType()
199         // xx 00 xx 00  UTF-16LE  in DetectType()
200         // xx xx xx xx  UTF-8  in DetectType()
214 …// Runtime check whether the size of character type is sufficient. It only perform checks with ass…  in DetectType()
242         \param putBOM Whether to write BOM at the beginning of the stream.
247 …// Runtime check whether the size of character type is sufficient. It only perform checks with ass…  in AutoUTFOutputStream()
261     void Flush() { os_->Flush(); }  in Flush()