ppapi/shared_impl/var.cc

   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
  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
  79 StringVar* Var::AsStringVar() { return NULL; }
  80
  81 ArrayBufferVar* Var::AsArrayBufferVar() { return NULL; }
  82
  83 NPObjectVar* Var::AsNPObjectVar() { return NULL; }
  84
  85 ProxyObjectVar* Var::AsProxyObjectVar() { return NULL; }
  86
  87 ArrayVar* Var::AsArrayVar() { return NULL; }
  88
  89 DictionaryVar* Var::AsDictionaryVar() { return NULL; }
  90
  91 ResourceVar* Var::AsResourceVar() { return NULL; }
  92
  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
 105 int32 Var::GetExistingVarID() const { return var_id_; }
 106
 107 Var::Var() : var_id_(0) {}
 108
 109 Var::~Var() {}
 110
 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
 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
 131 StringVar::StringVar() {}
 132
 133 StringVar::StringVar(const std::string& str) : value_(str) {}
 134
 135 StringVar::StringVar(const char* str, uint32 len) : value_(str, len) {}
 136
 137 StringVar::~StringVar() {}
 138
 139 StringVar* StringVar::AsStringVar() { return this; }
 140
 141 PP_VarType StringVar::GetType() const { return PP_VARTYPE_STRING; }
 142
 143 // static
 144 PP_Var StringVar::StringToPPVar(const std::string& var) {
 145   return StringToPPVar(var.c_str(), static_cast<uint32>(var.size()));
 146 }
 147
 148 // static
 149 PP_Var StringVar::StringToPPVar(const char* data, uint32 len) {
 150   scoped_refptr<StringVar> str(new StringVar(data, len));
 151   if (!str.get() || !IsStringUTF8(str->value()))
 152     return PP_MakeNull();
 153   return str->GetPPVar();
 154 }
 155
 156 // static
 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
 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
 176 ArrayBufferVar::ArrayBufferVar() {}
 177
 178 ArrayBufferVar::~ArrayBufferVar() {}
 179
 180 ArrayBufferVar* ArrayBufferVar::AsArrayBufferVar() { return this; }
 181
 182 PP_VarType ArrayBufferVar::GetType() const { return PP_VARTYPE_ARRAY_BUFFER; }
 183
 184 // static
 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