1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ppapi/shared_impl/var.h"
6
7 #include <limits>
8
9 #include "base/logging.h"
10 #include "base/strings/string_number_conversions.h"
11 #include "base/strings/string_util.h"
12 #include "base/strings/stringprintf.h"
13 #include "ppapi/c/pp_var.h"
14 #include "ppapi/shared_impl/ppapi_globals.h"
15 #include "ppapi/shared_impl/resource_var.h"
16 #include "ppapi/shared_impl/var_tracker.h"
17
18 namespace ppapi {
19
20 // Var -------------------------------------------------------------------------
21
22 // static
PPVarToLogString(PP_Var var)23 std::string Var::PPVarToLogString(PP_Var var) {
24 switch (var.type) {
25 case PP_VARTYPE_UNDEFINED:
26 return "[Undefined]";
27 case PP_VARTYPE_NULL:
28 return "[Null]";
29 case PP_VARTYPE_BOOL:
30 return var.value.as_bool ? "[True]" : "[False]";
31 case PP_VARTYPE_INT32:
32 return base::IntToString(var.value.as_int);
33 case PP_VARTYPE_DOUBLE:
34 return base::DoubleToString(var.value.as_double);
35 case PP_VARTYPE_STRING: {
36 StringVar* string(StringVar::FromPPVar(var));
37 if (!string)
38 return "[Invalid string]";
39
40 // Since this is for logging, escape NULLs, truncate length.
41 std::string result;
42 const size_t kTruncateAboveLength = 128;
43 if (string->value().size() > kTruncateAboveLength)
44 result = string->value().substr(0, kTruncateAboveLength) + "...";
45 else
46 result = string->value();
47
48 std::string null;
49 null.push_back(0);
50 ReplaceSubstringsAfterOffset(&result, 0, null, "\\0");
51 return result;
52 }
53 case PP_VARTYPE_OBJECT:
54 return "[Object]";
55 case PP_VARTYPE_ARRAY:
56 return "[Array]";
57 case PP_VARTYPE_DICTIONARY:
58 return "[Dictionary]";
59 case PP_VARTYPE_ARRAY_BUFFER:
60 return "[Array buffer]";
61 case PP_VARTYPE_RESOURCE: {
62 ResourceVar* resource(ResourceVar::FromPPVar(var));
63 if (!resource)
64 return "[Invalid resource]";
65
66 if (resource->IsPending()) {
67 return base::StringPrintf("[Pending resource]");
68 } else if (resource->GetPPResource()) {
69 return base::StringPrintf("[Resource %d]", resource->GetPPResource());
70 } else {
71 return "[Null resource]";
72 }
73 }
74 default:
75 return "[Invalid var]";
76 }
77 }
78
AsStringVar()79 StringVar* Var::AsStringVar() { return NULL; }
80
AsArrayBufferVar()81 ArrayBufferVar* Var::AsArrayBufferVar() { return NULL; }
82
AsV8ObjectVar()83 V8ObjectVar* Var::AsV8ObjectVar() { return NULL; }
84
AsProxyObjectVar()85 ProxyObjectVar* Var::AsProxyObjectVar() { return NULL; }
86
AsArrayVar()87 ArrayVar* Var::AsArrayVar() { return NULL; }
88
AsDictionaryVar()89 DictionaryVar* Var::AsDictionaryVar() { return NULL; }
90
AsResourceVar()91 ResourceVar* Var::AsResourceVar() { return NULL; }
92
GetPPVar()93 PP_Var Var::GetPPVar() {
94 int32 id = GetOrCreateVarID();
95 if (!id)
96 return PP_MakeNull();
97
98 PP_Var result;
99 result.type = GetType();
100 result.padding = 0;
101 result.value.as_id = id;
102 return result;
103 }
104
GetExistingVarID() const105 int32 Var::GetExistingVarID() const { return var_id_; }
106
Var()107 Var::Var() : var_id_(0) {}
108
~Var()109 Var::~Var() {}
110
GetOrCreateVarID()111 int32 Var::GetOrCreateVarID() {
112 VarTracker* tracker = PpapiGlobals::Get()->GetVarTracker();
113 if (var_id_) {
114 if (!tracker->AddRefVar(var_id_))
115 return 0;
116 } else {
117 var_id_ = tracker->AddVar(this);
118 if (!var_id_)
119 return 0;
120 }
121 return var_id_;
122 }
123
AssignVarID(int32 id)124 void Var::AssignVarID(int32 id) {
125 DCHECK(!var_id_); // Must not have already been generated.
126 var_id_ = id;
127 }
128
129 // StringVar -------------------------------------------------------------------
130
StringVar()131 StringVar::StringVar() {}
132
StringVar(const std::string & str)133 StringVar::StringVar(const std::string& str) : value_(str) {}
134
StringVar(const char * str,uint32 len)135 StringVar::StringVar(const char* str, uint32 len) : value_(str, len) {}
136
~StringVar()137 StringVar::~StringVar() {}
138
AsStringVar()139 StringVar* StringVar::AsStringVar() { return this; }
140
GetType() const141 PP_VarType StringVar::GetType() const { return PP_VARTYPE_STRING; }
142
143 // static
StringToPPVar(const std::string & var)144 PP_Var StringVar::StringToPPVar(const std::string& var) {
145 return StringToPPVar(var.c_str(), static_cast<uint32>(var.size()));
146 }
147
148 // static
StringToPPVar(const char * data,uint32 len)149 PP_Var StringVar::StringToPPVar(const char* data, uint32 len) {
150 scoped_refptr<StringVar> str(new StringVar(data, len));
151 if (!str.get() || !base::IsStringUTF8(str->value()))
152 return PP_MakeNull();
153 return str->GetPPVar();
154 }
155
156 // static
FromPPVar(PP_Var var)157 StringVar* StringVar::FromPPVar(PP_Var var) {
158 if (var.type != PP_VARTYPE_STRING)
159 return NULL;
160 scoped_refptr<Var> var_object(
161 PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
162 if (!var_object.get())
163 return NULL;
164 return var_object->AsStringVar();
165 }
166
167 // static
SwapValidatedUTF8StringIntoPPVar(std::string * src)168 PP_Var StringVar::SwapValidatedUTF8StringIntoPPVar(std::string* src) {
169 scoped_refptr<StringVar> str(new StringVar);
170 str->value_.swap(*src);
171 return str->GetPPVar();
172 }
173
174 // ArrayBufferVar --------------------------------------------------------------
175
ArrayBufferVar()176 ArrayBufferVar::ArrayBufferVar() {}
177
~ArrayBufferVar()178 ArrayBufferVar::~ArrayBufferVar() {}
179
AsArrayBufferVar()180 ArrayBufferVar* ArrayBufferVar::AsArrayBufferVar() { return this; }
181
GetType() const182 PP_VarType ArrayBufferVar::GetType() const { return PP_VARTYPE_ARRAY_BUFFER; }
183
184 // static
FromPPVar(PP_Var var)185 ArrayBufferVar* ArrayBufferVar::FromPPVar(PP_Var var) {
186 if (var.type != PP_VARTYPE_ARRAY_BUFFER)
187 return NULL;
188 scoped_refptr<Var> var_object(
189 PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
190 if (!var_object.get())
191 return NULL;
192 return var_object->AsArrayBufferVar();
193 }
194
195 } // namespace ppapi
196