1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkJSON.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,285 @@
1.4 +/*
1.5 + * Copyright 2011 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkJSON_DEFINED
1.12 +#define SkJSON_DEFINED
1.13 +
1.14 +#include "SkTypes.h"
1.15 +
1.16 +class SkStream;
1.17 +class SkString;
1.18 +
1.19 +class SkJSON {
1.20 +public:
1.21 + enum Type {
1.22 + kObject,
1.23 + kArray,
1.24 + kString,
1.25 + kInt,
1.26 + kFloat,
1.27 + kBool,
1.28 + };
1.29 +
1.30 + class Array;
1.31 +
1.32 + class Object {
1.33 + private:
1.34 + struct Slot;
1.35 +
1.36 + public:
1.37 + Object();
1.38 + Object(const Object&);
1.39 + ~Object();
1.40 +
1.41 + /**
1.42 + * Create a new slot with the specified name and value. The name
1.43 + * parameter is copied, but ownership of the Object parameter is
1.44 + * transferred. The Object parameter may be null, but the name must
1.45 + * not be null.
1.46 + */
1.47 + void addObject(const char name[], Object* value);
1.48 +
1.49 + /**
1.50 + * Create a new slot with the specified name and value. The name
1.51 + * parameter is copied, but ownership of the Array parameter is
1.52 + * transferred. The Array parameter may be null, but the name must
1.53 + * not be null.
1.54 + */
1.55 + void addArray(const char name[], Array* value);
1.56 +
1.57 + /**
1.58 + * Create a new slot with the specified name and value. Both parameters
1.59 + * are copied. The value parameter may be null, but the name must
1.60 + * not be null.
1.61 + */
1.62 + void addString(const char name[], const char value[]);
1.63 +
1.64 + /**
1.65 + * Create a new slot with the specified name and value. The name
1.66 + * parameter is copied, and must not be null.
1.67 + */
1.68 + void addInt(const char name[], int32_t value);
1.69 +
1.70 + /**
1.71 + * Create a new slot with the specified name and value. The name
1.72 + * parameter is copied, and must not be null.
1.73 + */
1.74 + void addFloat(const char name[], float value);
1.75 +
1.76 + /**
1.77 + * Create a new slot with the specified name and value. The name
1.78 + * parameter is copied, and must not be null.
1.79 + */
1.80 + void addBool(const char name[], bool value);
1.81 +
1.82 + /**
1.83 + * Return the number of slots/fields in this object. These can be
1.84 + * iterated using Iter.
1.85 + */
1.86 + int count() const;
1.87 +
1.88 + /**
1.89 + * Returns true if a slot matching the name and Type is found.
1.90 + */
1.91 + bool find(const char name[], Type) const;
1.92 + bool findObject(const char name[], Object** = NULL) const;
1.93 + bool findArray(const char name[], Array** = NULL) const;
1.94 + bool findString(const char name[], SkString* = NULL) const;
1.95 + bool findInt(const char name[], int32_t* = NULL) const;
1.96 + bool findFloat(const char name[], float* = NULL) const;
1.97 + bool findBool(const char name[], bool* = NULL) const;
1.98 +
1.99 + /**
1.100 + * Finds the first slot matching the name and Type and removes it.
1.101 + * Returns true if found, false if not.
1.102 + */
1.103 + bool remove(const char name[], Type);
1.104 +
1.105 + void toDebugf() const;
1.106 +
1.107 + /**
1.108 + * Iterator class which returns all of the fields/slots in an Object,
1.109 + * in the order that they were added.
1.110 + */
1.111 + class Iter {
1.112 + public:
1.113 + Iter(const Object&);
1.114 +
1.115 + /**
1.116 + * Returns true when there are no more entries in the iterator.
1.117 + * In this case, no other methods should be called.
1.118 + */
1.119 + bool done() const;
1.120 +
1.121 + /**
1.122 + * Moves the iterator to the next element. Should only be called
1.123 + * if done() returns false.
1.124 + */
1.125 + void next();
1.126 +
1.127 + /**
1.128 + * Returns the type of the current element. Should only be called
1.129 + * if done() returns false.
1.130 + */
1.131 + Type type() const;
1.132 +
1.133 + /**
1.134 + * Returns the name of the current element. Should only be called
1.135 + * if done() returns false.
1.136 + */
1.137 + const char* name() const;
1.138 +
1.139 + /**
1.140 + * Returns the type of the current element. Should only be called
1.141 + * if done() returns false and type() returns kObject.
1.142 + */
1.143 + Object* objectValue() const;
1.144 +
1.145 + /**
1.146 + * Returns the type of the current element. Should only be called
1.147 + * if done() returns false and type() returns kArray.
1.148 + */
1.149 + Array* arrayValue() const;
1.150 +
1.151 + /**
1.152 + * Returns the type of the current element. Should only be called
1.153 + * if done() returns false and type() returns kString.
1.154 + */
1.155 + const char* stringValue() const;
1.156 +
1.157 + /**
1.158 + * Returns the type of the current element. Should only be called
1.159 + * if done() returns false and type() returns kInt.
1.160 + */
1.161 + int32_t intValue() const;
1.162 +
1.163 + /**
1.164 + * Returns the type of the current element. Should only be called
1.165 + * if done() returns false and type() returns kFloat.
1.166 + */
1.167 + float floatValue() const;
1.168 +
1.169 + /**
1.170 + * Returns the type of the current element. Should only be called
1.171 + * if done() returns false and type() returns kBool.
1.172 + */
1.173 + bool boolValue() const;
1.174 +
1.175 + private:
1.176 + Slot* fSlot;
1.177 + };
1.178 +
1.179 + private:
1.180 + Slot* fHead;
1.181 + Slot* fTail;
1.182 +
1.183 + const Slot* findSlot(const char name[], Type) const;
1.184 + Slot* addSlot(Slot*);
1.185 + void dumpLevel(int level) const;
1.186 +
1.187 + friend class Array;
1.188 + };
1.189 +
1.190 + class Array {
1.191 + public:
1.192 + /**
1.193 + * Creates an array with the specified Type and element count. All
1.194 + * entries are initialized to NULL/0/false.
1.195 + */
1.196 + Array(Type, int count);
1.197 +
1.198 + /**
1.199 + * Creates an array of ints, initialized by copying the specified
1.200 + * values.
1.201 + */
1.202 + Array(const int32_t values[], int count);
1.203 +
1.204 + /**
1.205 + * Creates an array of floats, initialized by copying the specified
1.206 + * values.
1.207 + */
1.208 + Array(const float values[], int count);
1.209 +
1.210 + /**
1.211 + * Creates an array of bools, initialized by copying the specified
1.212 + * values.
1.213 + */
1.214 + Array(const bool values[], int count);
1.215 +
1.216 + Array(const Array&);
1.217 + ~Array();
1.218 +
1.219 + int count() const { return fCount; }
1.220 + Type type() const { return fType; }
1.221 +
1.222 + /**
1.223 + * Replace the element at the specified index with the specified
1.224 + * Object (which may be null). Ownership of the Object is transferred.
1.225 + * Should only be called if the Array's type is kObject.
1.226 + */
1.227 + void setObject(int index, Object*);
1.228 +
1.229 + /**
1.230 + * Replace the element at the specified index with the specified
1.231 + * Array (which may be null). Ownership of the Array is transferred.
1.232 + * Should only be called if the Array's type is kArray.
1.233 + */
1.234 + void setArray(int index, Array*);
1.235 +
1.236 + /**
1.237 + * Replace the element at the specified index with a copy of the
1.238 + * specified string (which may be null). Should only be called if the
1.239 + * Array's type is kString.
1.240 + */
1.241 + void setString(int index, const char str[]);
1.242 +
1.243 + Object* const* objects() const {
1.244 + SkASSERT(kObject == fType);
1.245 + return fArray.fObjects;
1.246 + }
1.247 + Array* const* arrays() const {
1.248 + SkASSERT(kObject == fType);
1.249 + return fArray.fArrays;
1.250 + }
1.251 + const char* const* strings() const {
1.252 + SkASSERT(kString == fType);
1.253 + return fArray.fStrings;
1.254 + }
1.255 + int32_t* ints() const {
1.256 + SkASSERT(kInt == fType);
1.257 + return fArray.fInts;
1.258 + }
1.259 + float* floats() const {
1.260 + SkASSERT(kFloat == fType);
1.261 + return fArray.fFloats;
1.262 + }
1.263 + bool* bools() const {
1.264 + SkASSERT(kBool == fType);
1.265 + return fArray.fBools;
1.266 + }
1.267 +
1.268 + private:
1.269 + int fCount;
1.270 + Type fType;
1.271 + union {
1.272 + void* fVoids;
1.273 + Object** fObjects;
1.274 + Array** fArrays;
1.275 + char** fStrings;
1.276 + int32_t* fInts;
1.277 + float* fFloats;
1.278 + bool* fBools;
1.279 + } fArray;
1.280 +
1.281 + void init(Type, int count, const void* src);
1.282 + void dumpLevel(int level) const;
1.283 +
1.284 + friend class Object;
1.285 + };
1.286 +};
1.287 +
1.288 +#endif
