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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/cpp/var.h"
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include "ppapi/c/pp_var.h"
#include "ppapi/c/ppb_var.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/logging.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/module_impl.h"
// Define equivalent to snprintf on Windows.
#if defined(_MSC_VER)
# define snprintf sprintf_s
#endif
namespace pp {
namespace {
template <> const char* interface_name<PPB_Var>() {
return PPB_VAR_INTERFACE;
}
// Technically you can call AddRef and Release on any Var, but it may involve
// cross-process calls depending on the plugin. This is an optimization so we
// only do refcounting on the necessary objects.
inline bool NeedsRefcounting(const PP_Var& var) {
return var.type > PP_VARTYPE_DOUBLE;
}
} // namespace
Var::Var() {
memset(&var_, 0, sizeof(var_));
var_.type = PP_VARTYPE_UNDEFINED;
needs_release_ = false;
}
Var::Var(Null) {
memset(&var_, 0, sizeof(var_));
var_.type = PP_VARTYPE_NULL;
needs_release_ = false;
}
Var::Var(bool b) {
var_.type = PP_VARTYPE_BOOL;
var_.padding = 0;
var_.value.as_bool = PP_FromBool(b);
needs_release_ = false;
}
Var::Var(int32_t i) {
var_.type = PP_VARTYPE_INT32;
var_.padding = 0;
var_.value.as_int = i;
needs_release_ = false;
}
Var::Var(double d) {
var_.type = PP_VARTYPE_DOUBLE;
var_.padding = 0;
var_.value.as_double = d;
needs_release_ = false;
}
Var::Var(const char* utf8_str) {
if (has_interface<PPB_Var>()) {
uint32_t len = utf8_str ? static_cast<uint32_t>(strlen(utf8_str)) : 0;
var_ = get_interface<PPB_Var>()->VarFromUtf8(Module::Get()->pp_module(),
utf8_str, len);
} else {
var_.type = PP_VARTYPE_NULL;
var_.padding = 0;
}
needs_release_ = (var_.type == PP_VARTYPE_STRING);
}
Var::Var(const std::string& utf8_str) {
if (has_interface<PPB_Var>()) {
var_ = get_interface<PPB_Var>()->VarFromUtf8(
Module::Get()->pp_module(),
utf8_str.c_str(),
static_cast<uint32_t>(utf8_str.size()));
} else {
var_.type = PP_VARTYPE_NULL;
var_.padding = 0;
}
needs_release_ = (var_.type == PP_VARTYPE_STRING);
}
Var::Var(const Var& other) {
var_ = other.var_;
if (NeedsRefcounting(var_)) {
if (has_interface<PPB_Var>()) {
needs_release_ = true;
get_interface<PPB_Var>()->AddRef(var_);
} else {
var_.type = PP_VARTYPE_NULL;
needs_release_ = false;
}
} else {
needs_release_ = false;
}
}
Var::~Var() {
if (needs_release_ && has_interface<PPB_Var>())
get_interface<PPB_Var>()->Release(var_);
}
Var& Var::operator=(const Var& other) {
if (needs_release_ && has_interface<PPB_Var>())
get_interface<PPB_Var>()->Release(var_);
var_ = other.var_;
if (NeedsRefcounting(var_)) {
if (has_interface<PPB_Var>()) {
needs_release_ = true;
get_interface<PPB_Var>()->AddRef(var_);
} else {
var_.type = PP_VARTYPE_NULL;
needs_release_ = false;
}
} else {
needs_release_ = false;
}
return *this;
}
bool Var::operator==(const Var& other) const {
if (var_.type != other.var_.type)
return false;
switch (var_.type) {
case PP_VARTYPE_UNDEFINED:
case PP_VARTYPE_NULL:
return true;
case PP_VARTYPE_BOOL:
return AsBool() == other.AsBool();
case PP_VARTYPE_INT32:
return AsInt() == other.AsInt();
case PP_VARTYPE_DOUBLE:
return AsDouble() == other.AsDouble();
case PP_VARTYPE_STRING:
if (var_.value.as_id == other.var_.value.as_id)
return true;
return AsString() == other.AsString();
default: // Objects, arrays, dictionaries.
return var_.value.as_id == other.var_.value.as_id;
}
}
bool Var::AsBool() const {
if (!is_bool()) {
PP_NOTREACHED();
return false;
}
return PP_ToBool(var_.value.as_bool);
}
int32_t Var::AsInt() const {
if (is_int())
return var_.value.as_int;
if (is_double())
return static_cast<int>(var_.value.as_double);
PP_NOTREACHED();
return 0;
}
double Var::AsDouble() const {
if (is_double())
return var_.value.as_double;
if (is_int())
return static_cast<double>(var_.value.as_int);
PP_NOTREACHED();
return 0.0;
}
std::string Var::AsString() const {
if (!is_string()) {
PP_NOTREACHED();
return std::string();
}
if (!has_interface<PPB_Var>())
return std::string();
uint32_t len;
const char* str = get_interface<PPB_Var>()->VarToUtf8(var_, &len);
return std::string(str, len);
}
std::string Var::DebugString() const {
char buf[256];
if (is_undefined()) {
snprintf(buf, sizeof(buf), "Var<UNDEFINED>");
} else if (is_null()) {
snprintf(buf, sizeof(buf), "Var<NULL>");
} else if (is_bool()) {
snprintf(buf, sizeof(buf), AsBool() ? "Var<true>" : "Var<false>");
} else if (is_int()) {
// Note that the following static_cast is necessary because
// NativeClient's int32_t is actually "long".
// TODO(sehr,polina): remove this after newlib is changed.
snprintf(buf, sizeof(buf), "Var<%d>", static_cast<int>(AsInt()));
} else if (is_double()) {
snprintf(buf, sizeof(buf), "Var<%f>", AsDouble());
} else if (is_string()) {
char format[] = "Var<'%s'>";
size_t decoration = sizeof(format) - 2; // The %s is removed.
size_t available = sizeof(buf) - decoration;
std::string str = AsString();
if (str.length() > available) {
str.resize(available - 3); // Reserve space for ellipsis.
str.append("...");
}
snprintf(buf, sizeof(buf), format, str.c_str());
} else if (is_object()) {
snprintf(buf, sizeof(buf), "Var<OBJECT>");
}
return buf;
}
} // namespace pp
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