mirror of
https://github.com/zebrajr/node.git
synced 2026-01-15 12:15:26 +00:00
157d2bcc04
gcc 4.2 on OS X gets confused about the call to node::Buffer::Data().
Fully qualify the function name to help it along.
Fixes the following build error:
../../deps/v8/include/v8.h: In function ‘char*
node::Buffer::Data(v8::Handle<v8::Value>)’:
../../deps/v8/include/v8.h:900: error: ‘class v8::Data’
is not a function,
../../src/node_buffer.h:38: error:
conflict with ‘char* node::Buffer::Data(v8::Handle<v8::Object>)’
../../src/node_buffer.cc:94: error:
in call to ‘Data’
621 lines
17 KiB
C++
621 lines
17 KiB
C++
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "node.h"
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#include "node_internals.h"
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#include "node_buffer.h"
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#include "smalloc.h"
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#include "string_bytes.h"
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#include "v8.h"
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#include "v8-profiler.h"
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#include <assert.h>
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#include <string.h>
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#include <limits.h>
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#define CHECK_NOT_OOB(r) \
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do { if (!(r)) return ThrowRangeError("out of range index"); } while (0)
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#define ARGS_THIS(argT) \
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Local<Object> obj = argT; \
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size_t obj_length = obj->GetIndexedPropertiesExternalArrayDataLength(); \
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char* obj_data = static_cast<char*>( \
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obj->GetIndexedPropertiesExternalArrayData());
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#define SLICE_START_END(start_arg, end_arg, end_max) \
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size_t start; \
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size_t end; \
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CHECK_NOT_OOB(ParseArrayIndex(start_arg, 0, &start)); \
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CHECK_NOT_OOB(ParseArrayIndex(end_arg, end_max, &end)); \
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if (end < start) end = start; \
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CHECK_NOT_OOB(end <= end_max); \
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size_t length = end - start;
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namespace node {
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namespace Buffer {
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using v8::Arguments;
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using v8::Function;
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using v8::FunctionTemplate;
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using v8::Handle;
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using v8::HandleScope;
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using v8::Local;
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using v8::Number;
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using v8::Object;
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using v8::Persistent;
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using v8::String;
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using v8::Uint32;
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using v8::Undefined;
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using v8::Value;
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Persistent<Function> p_buffer_fn;
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bool HasInstance(Handle<Value> val) {
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return val->IsObject() && HasInstance(val.As<Object>());
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}
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bool HasInstance(Handle<Object> obj) {
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if (!obj->HasIndexedPropertiesInExternalArrayData())
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return false;
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v8::ExternalArrayType type = obj->GetIndexedPropertiesExternalArrayDataType();
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return type == v8::kExternalUnsignedByteArray;
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}
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char* Data(Handle<Value> val) {
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assert(val->IsObject());
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// Use a fully qualified name here to work around a bug in gcc 4.2.
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// It mistakes an unadorned call to Data() for the v8::String::Data type.
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return node::Buffer::Data(val.As<Object>());
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}
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char* Data(Handle<Object> obj) {
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assert(obj->HasIndexedPropertiesInExternalArrayData());
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return static_cast<char*>(obj->GetIndexedPropertiesExternalArrayData());
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}
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size_t Length(Handle<Value> val) {
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assert(val->IsObject());
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return Length(val.As<Object>());
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}
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size_t Length(Handle<Object> obj) {
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assert(obj->HasIndexedPropertiesInExternalArrayData());
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return obj->GetIndexedPropertiesExternalArrayDataLength();
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}
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Local<Object> New(Handle<String> string, enum encoding enc) {
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HandleScope scope(node_isolate);
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size_t length = StringBytes::Size(string, enc);
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Local<Object> buf = New(length);
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char* data = Buffer::Data(buf);
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StringBytes::Write(data, length, string, enc);
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return scope.Close(buf);
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}
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// TODO(trevnorris): these have a flaw by needing to call the Buffer inst then
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// Alloc. continue to look for a better architecture.
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Local<Object> New(size_t length) {
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HandleScope scope(node_isolate);
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assert(length <= kMaxLength);
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Handle<Value> argv[2];
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// this is safe b/c Undefined and length fits in an SMI, so there's no risk
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// of GC reclaiming the values prematurely.
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argv[0] = Undefined(node_isolate);
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argv[1] = Uint32::New(length, node_isolate);
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Local<Object> obj = p_buffer_fn->NewInstance(2, argv);
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smalloc::Alloc(obj, new char[length], length);
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return scope.Close(obj);
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}
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// TODO(trevnorris): for backwards compatibility this is left to copy the data,
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// but for consistency w/ the other should use data. And a copy version renamed
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// to something else.
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Local<Object> New(const char* data, size_t length) {
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HandleScope scope(node_isolate);
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assert(length <= kMaxLength);
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Handle<Value> argv[2];
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// this is safe b/c Undefined and length fits in an SMI, so there's no risk
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// of GC reclaiming the values prematurely.
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argv[0] = Undefined(node_isolate);
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argv[1] = Uint32::New(length, node_isolate);
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Local<Object> obj = p_buffer_fn->NewInstance(2, argv);
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char* new_data = new char[length];
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memcpy(new_data, data, length);
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smalloc::Alloc(obj, new_data, length);
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return scope.Close(obj);
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}
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Local<Object> New(char* data,
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size_t length,
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smalloc::FreeCallback callback,
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void* hint) {
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HandleScope scope(node_isolate);
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assert(length <= kMaxLength);
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Handle<Value> argv[2];
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// this is safe b/c Undefined and length fits in an SMI, so there's no risk
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// of GC reclaiming the values prematurely.
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argv[0] = Undefined(node_isolate);
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argv[1] = Uint32::New(length, node_isolate);
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Local<Object> obj = p_buffer_fn->NewInstance(2, argv);
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smalloc::Alloc(obj, data, length, callback, hint);
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return scope.Close(obj);
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}
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Local<Object> Use(char* data, uint32_t length) {
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HandleScope scope(node_isolate);
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assert(length <= kMaxLength);
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Handle<Value> argv[2];
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// this is safe b/c Undefined and length fits in an SMI, so there's no risk
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// of GC reclaiming the values prematurely.
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argv[0] = Undefined(node_isolate);
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argv[1] = Uint32::New(length, node_isolate);
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Local<Object> obj = p_buffer_fn->NewInstance(2, argv);
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smalloc::Alloc(obj, data, length);
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return scope.Close(obj);
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}
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template <encoding encoding>
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Handle<Value> StringSlice(const Arguments& args) {
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HandleScope scope(node_isolate);
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ARGS_THIS(args.This())
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SLICE_START_END(args[0], args[1], obj_length)
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return scope.Close(StringBytes::Encode(obj_data + start, length, encoding));
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}
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Handle<Value> BinarySlice(const Arguments& args) {
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return StringSlice<BINARY>(args);
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}
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Handle<Value> AsciiSlice(const Arguments& args) {
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return StringSlice<ASCII>(args);
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}
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Handle<Value> Utf8Slice(const Arguments& args) {
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return StringSlice<UTF8>(args);
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}
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Handle<Value> Ucs2Slice(const Arguments& args) {
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return StringSlice<UCS2>(args);
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}
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Handle<Value> HexSlice(const Arguments& args) {
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return StringSlice<HEX>(args);
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}
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Handle<Value> Base64Slice(const Arguments& args) {
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return StringSlice<BASE64>(args);
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}
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// bytesCopied = buffer.copy(target[, targetStart][, sourceStart][, sourceEnd]);
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Handle<Value> Copy(const Arguments &args) {
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HandleScope scope(node_isolate);
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Local<Object> target = args[0]->ToObject();
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if (!HasInstance(target))
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return ThrowTypeError("first arg should be a Buffer");
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ARGS_THIS(args.This())
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size_t target_length = target->GetIndexedPropertiesExternalArrayDataLength();
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char* target_data = static_cast<char*>(
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target->GetIndexedPropertiesExternalArrayData());
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size_t target_start;
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size_t source_start;
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size_t source_end;
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CHECK_NOT_OOB(ParseArrayIndex(args[1], 0, &target_start));
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CHECK_NOT_OOB(ParseArrayIndex(args[2], 0, &source_start));
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CHECK_NOT_OOB(ParseArrayIndex(args[3], obj_length, &source_end));
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// Copy 0 bytes; we're done
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if (target_start >= target_length || source_start >= source_end)
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return scope.Close(Uint32::New(0, node_isolate));
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if (source_start > obj_length)
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return ThrowRangeError("out of range index");
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if (source_end - source_start > target_length - target_start)
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source_end = source_start + target_length - target_start;
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size_t to_copy = MIN(MIN(source_end - source_start,
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target_length - target_start),
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obj_length - source_start);
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memmove(target_data + target_start, obj_data + source_start, to_copy);
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return scope.Close(Uint32::New(to_copy, node_isolate));
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}
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// buffer.fill(value[, start][, end]);
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Handle<Value> Fill(const Arguments &args) {
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HandleScope scope(node_isolate);
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ARGS_THIS(args.This())
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SLICE_START_END(args[1], args[2], obj_length)
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if (args[0]->IsNumber()) {
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int value = args[0]->Uint32Value() & 255;
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memset(obj_data + start, value, length);
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return args.This();
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}
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String::Utf8Value at(args[0]);
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size_t at_length = at.length();
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// optimize single ascii character case
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if (at_length == 1) {
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int value = static_cast<int>((*at)[0]);
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memset(obj_data + start, value, length);
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return args.This();
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}
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size_t in_there = at_length;
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char* ptr = obj_data + start + at_length;
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memcpy(obj_data + start, *at, MIN(at_length, length));
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if (at_length >= length)
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return args.This();
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while (in_there < length - in_there) {
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memcpy(ptr, obj_data + start, in_there);
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ptr += in_there;
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in_there *= 2;
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}
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if (in_there < length) {
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memcpy(ptr, obj_data + start, length - in_there);
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in_there = length;
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}
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return args.This();
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}
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template <encoding encoding>
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Handle<Value> StringWrite(const Arguments& args) {
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HandleScope scope(node_isolate);
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ARGS_THIS(args.This())
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if (!args[0]->IsString())
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return ThrowTypeError("Argument must be a string");
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Local<String> str = args[0]->ToString();
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if (encoding == HEX && str->Length() % 2 != 0)
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return ThrowTypeError("Invalid hex string");
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size_t offset;
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size_t max_length;
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CHECK_NOT_OOB(ParseArrayIndex(args[1], 0, &offset));
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CHECK_NOT_OOB(ParseArrayIndex(args[2], obj_length - offset, &max_length));
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max_length = MIN(obj_length - offset, max_length);
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if (max_length == 0)
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return scope.Close(Uint32::New(0, node_isolate));
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if (encoding == UCS2)
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max_length = max_length / 2;
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if (offset >= obj_length)
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return ThrowRangeError("Offset is out of bounds");
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size_t written = StringBytes::Write(obj_data + offset,
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max_length,
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str,
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encoding,
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NULL);
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return scope.Close(Uint32::New(written, node_isolate));
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}
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Handle<Value> Base64Write(const Arguments& args) {
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return StringWrite<BASE64>(args);
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}
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Handle<Value> BinaryWrite(const Arguments& args) {
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return StringWrite<BINARY>(args);
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}
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Handle<Value> Utf8Write(const Arguments& args) {
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return StringWrite<UTF8>(args);
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}
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Handle<Value> Ucs2Write(const Arguments& args) {
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return StringWrite<UCS2>(args);
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}
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Handle<Value> HexWrite(const Arguments& args) {
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return StringWrite<HEX>(args);
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}
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Handle<Value> AsciiWrite(const Arguments& args) {
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return StringWrite<ASCII>(args);
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}
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static inline void Swizzle(char* start, unsigned int len) {
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char* end = start + len - 1;
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while (start < end) {
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char tmp = *start;
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*start++ = *end;
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*end-- = tmp;
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}
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}
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template <typename T, enum Endianness endianness>
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Handle<Value> ReadFloatGeneric(const Arguments& args) {
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bool doAssert = !args[1]->BooleanValue();
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size_t offset;
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CHECK_NOT_OOB(ParseArrayIndex(args[0], 0, &offset));
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if (doAssert) {
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size_t len = Length(args.This());
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if (offset + sizeof(T) > len || offset + sizeof(T) < offset)
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return ThrowRangeError("Trying to read beyond buffer length");
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}
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union NoAlias {
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T val;
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char bytes[sizeof(T)];
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};
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union NoAlias na;
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const void* data = args.This()->GetIndexedPropertiesExternalArrayData();
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const char* ptr = static_cast<const char*>(data) + offset;
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memcpy(na.bytes, ptr, sizeof(na.bytes));
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if (endianness != GetEndianness()) Swizzle(na.bytes, sizeof(na.bytes));
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return Number::New(na.val);
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}
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Handle<Value> ReadFloatLE(const Arguments& args) {
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return ReadFloatGeneric<float, kLittleEndian>(args);
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}
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Handle<Value> ReadFloatBE(const Arguments& args) {
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return ReadFloatGeneric<float, kBigEndian>(args);
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}
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Handle<Value> ReadDoubleLE(const Arguments& args) {
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return ReadFloatGeneric<double, kLittleEndian>(args);
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}
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Handle<Value> ReadDoubleBE(const Arguments& args) {
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return ReadFloatGeneric<double, kBigEndian>(args);
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}
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template <typename T, enum Endianness endianness>
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Handle<Value> WriteFloatGeneric(const Arguments& args) {
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bool doAssert = !args[2]->BooleanValue();
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T val = static_cast<T>(args[0]->NumberValue());
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size_t offset;
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CHECK_NOT_OOB(ParseArrayIndex(args[1], 0, &offset));
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if (doAssert) {
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size_t len = Length(args.This());
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if (offset + sizeof(T) > len || offset + sizeof(T) < offset)
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return ThrowRangeError("Trying to write beyond buffer length");
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}
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union NoAlias {
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T val;
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char bytes[sizeof(T)];
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};
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union NoAlias na = { val };
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void* data = args.This()->GetIndexedPropertiesExternalArrayData();
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char* ptr = static_cast<char*>(data) + offset;
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if (endianness != GetEndianness()) Swizzle(na.bytes, sizeof(na.bytes));
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memcpy(ptr, na.bytes, sizeof(na.bytes));
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return Undefined(node_isolate);
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}
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Handle<Value> WriteFloatLE(const Arguments& args) {
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return WriteFloatGeneric<float, kLittleEndian>(args);
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}
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Handle<Value> WriteFloatBE(const Arguments& args) {
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return WriteFloatGeneric<float, kBigEndian>(args);
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}
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Handle<Value> WriteDoubleLE(const Arguments& args) {
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return WriteFloatGeneric<double, kLittleEndian>(args);
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}
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Handle<Value> WriteDoubleBE(const Arguments& args) {
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return WriteFloatGeneric<double, kBigEndian>(args);
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}
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Handle<Value> ByteLength(const Arguments &args) {
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HandleScope scope(node_isolate);
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if (!args[0]->IsString())
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return ThrowTypeError("Argument must be a string");
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Local<String> s = args[0]->ToString();
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enum encoding e = ParseEncoding(args[1], UTF8);
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return scope.Close(Uint32::New(StringBytes::Size(s, e), node_isolate));
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}
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// pass Buffer object to load prototype methods
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Handle<Value> SetupBufferJS(const Arguments& args) {
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HandleScope scope(node_isolate);
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assert(args[0]->IsFunction());
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Local<Function> bv = args[0].As<Function>();
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p_buffer_fn = Persistent<Function>::New(node_isolate, bv);
|
|
Local<Value> proto_v = bv->Get(String::New("prototype"));
|
|
|
|
assert(proto_v->IsObject());
|
|
|
|
Local<Object> proto = proto_v.As<Object>();
|
|
|
|
bv->Set(String::New("byteLength"),
|
|
FunctionTemplate::New(ByteLength)->GetFunction());
|
|
|
|
proto->Set(String::New("asciiSlice"),
|
|
FunctionTemplate::New(AsciiSlice)->GetFunction());
|
|
proto->Set(String::New("base64Slice"),
|
|
FunctionTemplate::New(Base64Slice)->GetFunction());
|
|
proto->Set(String::New("binarySlice"),
|
|
FunctionTemplate::New(BinarySlice)->GetFunction());
|
|
proto->Set(String::New("hexSlice"),
|
|
FunctionTemplate::New(HexSlice)->GetFunction());
|
|
proto->Set(String::New("ucs2Slice"),
|
|
FunctionTemplate::New(Ucs2Slice)->GetFunction());
|
|
proto->Set(String::New("utf8Slice"),
|
|
FunctionTemplate::New(Utf8Slice)->GetFunction());
|
|
|
|
proto->Set(String::New("asciiWrite"),
|
|
FunctionTemplate::New(AsciiWrite)->GetFunction());
|
|
proto->Set(String::New("base64Write"),
|
|
FunctionTemplate::New(Base64Write)->GetFunction());
|
|
proto->Set(String::New("binaryWrite"),
|
|
FunctionTemplate::New(BinaryWrite)->GetFunction());
|
|
proto->Set(String::New("hexWrite"),
|
|
FunctionTemplate::New(HexWrite)->GetFunction());
|
|
proto->Set(String::New("ucs2Write"),
|
|
FunctionTemplate::New(Ucs2Write)->GetFunction());
|
|
proto->Set(String::New("utf8Write"),
|
|
FunctionTemplate::New(Utf8Write)->GetFunction());
|
|
|
|
proto->Set(String::New("readDoubleBE"),
|
|
FunctionTemplate::New(ReadDoubleBE)->GetFunction());
|
|
proto->Set(String::New("readDoubleLE"),
|
|
FunctionTemplate::New(ReadDoubleLE)->GetFunction());
|
|
proto->Set(String::New("readFloatBE"),
|
|
FunctionTemplate::New(ReadFloatBE)->GetFunction());
|
|
proto->Set(String::New("readFloatLE"),
|
|
FunctionTemplate::New(ReadFloatLE)->GetFunction());
|
|
|
|
proto->Set(String::New("writeDoubleBE"),
|
|
FunctionTemplate::New(WriteDoubleBE)->GetFunction());
|
|
proto->Set(String::New("writeDoubleLE"),
|
|
FunctionTemplate::New(WriteDoubleLE)->GetFunction());
|
|
proto->Set(String::New("writeFloatBE"),
|
|
FunctionTemplate::New(WriteFloatBE)->GetFunction());
|
|
proto->Set(String::New("writeFloatLE"),
|
|
FunctionTemplate::New(WriteFloatLE)->GetFunction());
|
|
|
|
proto->Set(String::New("copy"),
|
|
FunctionTemplate::New(Copy)->GetFunction());
|
|
proto->Set(String::New("fill"),
|
|
FunctionTemplate::New(Fill)->GetFunction());
|
|
|
|
// for backwards compatibility
|
|
proto->Set(String::New("offset"), Uint32::New(0, node_isolate), v8::ReadOnly);
|
|
|
|
return Undefined(node_isolate);
|
|
}
|
|
|
|
|
|
void Initialize(Handle<Object> target) {
|
|
HandleScope scope(node_isolate);
|
|
|
|
target->Set(String::New("setupBufferJS"),
|
|
FunctionTemplate::New(SetupBufferJS)->GetFunction());
|
|
}
|
|
|
|
|
|
} // namespace Buffer
|
|
|
|
} // namespace node
|
|
|
|
NODE_MODULE(node_buffer, node::Buffer::Initialize)
|