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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/shared_impl/var.h"
#include <stddef.h>
#include <limits>
#include <string_view>
#include "base/check.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "ppapi/c/pp_var.h"
#include "ppapi/shared_impl/ppapi_globals.h"
#include "ppapi/shared_impl/resource_var.h"
#include "ppapi/shared_impl/var_tracker.h"
namespace ppapi {
// Var -------------------------------------------------------------------------
// static
std::string Var::PPVarToLogString(PP_Var var) {
switch (var.type) {
case PP_VARTYPE_UNDEFINED:
return "[Undefined]";
case PP_VARTYPE_NULL:
return "[Null]";
case PP_VARTYPE_BOOL:
return var.value.as_bool ? "[True]" : "[False]";
case PP_VARTYPE_INT32:
return base::NumberToString(var.value.as_int);
case PP_VARTYPE_DOUBLE:
return base::NumberToString(var.value.as_double);
case PP_VARTYPE_STRING: {
StringVar* string(StringVar::FromPPVar(var));
if (!string)
return "[Invalid string]";
// Since this is for logging, escape NULLs, truncate length.
std::string result;
const size_t kTruncateAboveLength = 128;
if (string->value().size() > kTruncateAboveLength)
result = string->value().substr(0, kTruncateAboveLength) + "...";
else
result = string->value();
base::ReplaceSubstringsAfterOffset(&result, 0, std::string_view("\0", 1),
"\\0");
return result;
}
case PP_VARTYPE_OBJECT:
return "[Object]";
case PP_VARTYPE_ARRAY:
return "[Array]";
case PP_VARTYPE_DICTIONARY:
return "[Dictionary]";
case PP_VARTYPE_ARRAY_BUFFER:
return "[Array buffer]";
case PP_VARTYPE_RESOURCE: {
ResourceVar* resource(ResourceVar::FromPPVar(var));
if (!resource)
return "[Invalid resource]";
if (resource->IsPending()) {
return base::StringPrintf("[Pending resource]");
} else if (resource->GetPPResource()) {
return base::StringPrintf("[Resource %d]", resource->GetPPResource());
} else {
return "[Null resource]";
}
}
default:
return "[Invalid var]";
}
}
StringVar* Var::AsStringVar() { return NULL; }
ArrayBufferVar* Var::AsArrayBufferVar() { return NULL; }
V8ObjectVar* Var::AsV8ObjectVar() { return NULL; }
ProxyObjectVar* Var::AsProxyObjectVar() { return NULL; }
ArrayVar* Var::AsArrayVar() { return NULL; }
DictionaryVar* Var::AsDictionaryVar() { return NULL; }
ResourceVar* Var::AsResourceVar() { return NULL; }
PP_Var Var::GetPPVar() {
int32_t id = GetOrCreateVarID();
if (!id)
return PP_MakeNull();
PP_Var result;
result.type = GetType();
result.padding = 0;
result.value.as_id = id;
return result;
}
int32_t Var::GetExistingVarID() const {
return var_id_;
}
Var::Var() : var_id_(0) {}
Var::~Var() {}
int32_t Var::GetOrCreateVarID() {
VarTracker* tracker = PpapiGlobals::Get()->GetVarTracker();
if (var_id_) {
if (!tracker->AddRefVar(var_id_))
return 0;
} else {
var_id_ = tracker->AddVar(this);
if (!var_id_)
return 0;
}
return var_id_;
}
void Var::AssignVarID(int32_t id) {
DCHECK(!var_id_); // Must not have already been generated.
var_id_ = id;
}
// StringVar -------------------------------------------------------------------
StringVar::StringVar() {}
StringVar::StringVar(const std::string& str) : value_(str) {}
StringVar::StringVar(const char* str, uint32_t len) : value_(str, len) {}
StringVar::~StringVar() {}
StringVar* StringVar::AsStringVar() { return this; }
PP_VarType StringVar::GetType() const { return PP_VARTYPE_STRING; }
// static
PP_Var StringVar::StringToPPVar(const std::string& var) {
return StringToPPVar(var.c_str(), static_cast<uint32_t>(var.size()));
}
// static
PP_Var StringVar::StringToPPVar(const char* data, uint32_t len) {
scoped_refptr<StringVar> str(new StringVar(data, len));
if (!str.get() || !base::IsStringUTF8(str->value()))
return PP_MakeNull();
return str->GetPPVar();
}
// static
StringVar* StringVar::FromPPVar(PP_Var var) {
if (var.type != PP_VARTYPE_STRING)
return NULL;
scoped_refptr<Var> var_object(
PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
if (!var_object.get())
return NULL;
return var_object->AsStringVar();
}
// static
PP_Var StringVar::SwapValidatedUTF8StringIntoPPVar(std::string* src) {
scoped_refptr<StringVar> str(new StringVar);
str->value_.swap(*src);
return str->GetPPVar();
}
// ArrayBufferVar --------------------------------------------------------------
ArrayBufferVar::ArrayBufferVar() {}
ArrayBufferVar::~ArrayBufferVar() {}
ArrayBufferVar* ArrayBufferVar::AsArrayBufferVar() { return this; }
PP_VarType ArrayBufferVar::GetType() const { return PP_VARTYPE_ARRAY_BUFFER; }
// static
ArrayBufferVar* ArrayBufferVar::FromPPVar(PP_Var var) {
if (var.type != PP_VARTYPE_ARRAY_BUFFER)
return NULL;
scoped_refptr<Var> var_object(
PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
if (!var_object.get())
return NULL;
return var_object->AsArrayBufferVar();
}
} // namespace ppapi
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