| // Copyright Joyent, Inc. and other Node contributors. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a |
| // copy of this software and associated documentation files (the |
| // "Software"), to deal in the Software without restriction, including |
| // without limitation the rights to use, copy, modify, merge, publish, |
| // distribute, sublicense, and/or sell copies of the Software, and to permit |
| // persons to whom the Software is furnished to do so, subject to the |
| // following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included |
| // in all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN |
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| // USE OR OTHER DEALINGS IN THE SOFTWARE. |
| |
| #ifndef SRC_STRING_BYTES_H_ |
| #define SRC_STRING_BYTES_H_ |
| |
| #if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS |
| |
| // Decodes a v8::Local<v8::String> or Buffer to a raw char* |
| |
| #if (__GNUC__ >= 8) && !defined(__clang__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wcast-function-type" |
| #endif |
| #include "v8.h" |
| #if (__GNUC__ >= 8) && !defined(__clang__) |
| #pragma GCC diagnostic pop |
| #endif |
| #include "env-inl.h" |
| |
| #include <string> |
| |
| namespace node { |
| |
| class StringBytes { |
| public: |
| class InlineDecoder : public MaybeStackBuffer<char> { |
| public: |
| inline v8::Maybe<bool> Decode(Environment* env, |
| v8::Local<v8::String> string, |
| enum encoding enc) { |
| size_t storage; |
| if (!StringBytes::StorageSize(env->isolate(), string, enc).To(&storage)) |
| return v8::Nothing<bool>(); |
| AllocateSufficientStorage(storage); |
| const size_t length = |
| StringBytes::Write(env->isolate(), out(), storage, string, enc); |
| |
| // No zero terminator is included when using this method. |
| SetLength(length); |
| return v8::Just(true); |
| } |
| |
| inline size_t size() const { return length(); } |
| }; |
| |
| // Fast, but can be 2 bytes oversized for Base64, and |
| // as much as triple UTF-8 strings <= 65536 chars in length |
| static v8::Maybe<size_t> StorageSize(v8::Isolate* isolate, |
| v8::Local<v8::Value> val, |
| enum encoding enc); |
| |
| // Precise byte count, but slightly slower for Base64 and |
| // very much slower for UTF-8 |
| static v8::Maybe<size_t> Size(v8::Isolate* isolate, |
| v8::Local<v8::Value> val, |
| enum encoding enc); |
| |
| // Write the bytes from the string or buffer into the char* |
| // returns the number of bytes written, which will always be |
| // <= buflen. Use StorageSize/Size first to know how much |
| // memory to allocate. |
| static size_t Write(v8::Isolate* isolate, |
| char* buf, |
| size_t buflen, |
| v8::Local<v8::Value> val, |
| enum encoding enc, |
| int* chars_written = nullptr); |
| |
| // Take the bytes in the src, and turn it into a Buffer or String. |
| static v8::MaybeLocal<v8::Value> Encode(v8::Isolate* isolate, |
| const char* buf, |
| size_t buflen, |
| enum encoding encoding, |
| v8::Local<v8::Value>* error); |
| |
| // Warning: This reverses endianness on BE platforms, even though the |
| // signature using uint16_t implies that it should not. |
| // However, the brokenness is already public API and can't therefore |
| // be changed easily. |
| static v8::MaybeLocal<v8::Value> Encode(v8::Isolate* isolate, |
| const uint16_t* buf, |
| size_t buflen, |
| v8::Local<v8::Value>* error); |
| |
| static v8::MaybeLocal<v8::Value> Encode(v8::Isolate* isolate, |
| const char* buf, |
| enum encoding encoding, |
| v8::Local<v8::Value>* error); |
| |
| static size_t hex_encode(const char* src, |
| size_t slen, |
| char* dst, |
| size_t dlen); |
| |
| static std::string hex_encode(const char* src, size_t slen); |
| |
| private: |
| static size_t WriteUCS2(v8::Isolate* isolate, |
| char* buf, |
| size_t buflen, |
| v8::Local<v8::String> str, |
| int flags, |
| size_t* chars_written); |
| }; |
| |
| } // namespace node |
| |
| #endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS |
| |
| #endif // SRC_STRING_BYTES_H_ |