OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright 2013 Google, Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 |
| 9 #ifndef SkRTConf_DEFINED |
| 10 #define SkRTConf_DEFINED |
| 11 |
| 12 #include "../private/SkTDArray.h" |
| 13 #include "../private/SkTDict.h" |
| 14 #include "SkString.h" |
| 15 #include "SkStream.h" |
| 16 |
| 17 /** \class SkRTConfBase |
| 18 Non-templated base class for the runtime configs |
| 19 */ |
| 20 |
| 21 class SkRTConfBase { |
| 22 public: |
| 23 SkRTConfBase(const char *name) : fName(name) {} |
| 24 virtual ~SkRTConfBase() {} |
| 25 virtual const char *getName() const { return fName.c_str(); } |
| 26 virtual bool isDefault() const = 0; |
| 27 virtual void print(SkWStream *o) const = 0; |
| 28 virtual bool equals(const SkRTConfBase *conf) const = 0; |
| 29 protected: |
| 30 SkString fName; |
| 31 }; |
| 32 |
| 33 /** \class SkRTConf |
| 34 A class to provide runtime configurability. |
| 35 */ |
| 36 template<typename T> class SkRTConf: public SkRTConfBase { |
| 37 public: |
| 38 SkRTConf(const char *name, const T &defaultValue, const char *description); |
| 39 operator const T&() const { return fValue; } |
| 40 void print(SkWStream *o) const; |
| 41 bool equals(const SkRTConfBase *conf) const; |
| 42 bool isDefault() const { return fDefault == fValue; } |
| 43 void set(const T& value) { fValue = value; } |
| 44 protected: |
| 45 void doPrint(char *s) const; |
| 46 |
| 47 T fValue; |
| 48 T fDefault; |
| 49 SkString fDescription; |
| 50 }; |
| 51 |
| 52 #ifdef SK_DEBUG |
| 53 #define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description)
static SkRTConf<confType> varName(confName, defaultValue, description) |
| 54 #define SK_CONF_SET(confname, value) \ |
| 55 skRTConfRegistry().set(confname, value, true) |
| 56 /* SK_CONF_TRY_SET() is like SK_CONF_SET(), but doesn't complain if |
| 57 confname can't be found. This is useful if the SK_CONF_DECLARE is |
| 58 inside a source file whose linkage is dependent on the system. */ |
| 59 #define SK_CONF_TRY_SET(confname, value) \ |
| 60 skRTConfRegistry().set(confname, value, false) |
| 61 #else |
| 62 #define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description)
static confType varName = defaultValue |
| 63 #define SK_CONF_SET(confname, value) (void) confname, (void) value |
| 64 #define SK_CONF_TRY_SET(confname, value) (void) confname, (void) value |
| 65 #endif |
| 66 |
| 67 /** \class SkRTConfRegistry |
| 68 A class that maintains a systemwide registry of all runtime configuration |
| 69 parameters. Mainly used for printing them out and handling multiply-defined |
| 70 knobs. |
| 71 */ |
| 72 |
| 73 class SkRTConfRegistry { |
| 74 public: |
| 75 SkRTConfRegistry(); |
| 76 ~SkRTConfRegistry(); |
| 77 void printAll(const char *fname = NULL) const; |
| 78 bool hasNonDefault() const; |
| 79 void printNonDefault(const char *fname = NULL) const; |
| 80 const char *configFileLocation() const; |
| 81 void possiblyDumpFile() const; |
| 82 void validate() const; |
| 83 template <typename T> void set(const char *confname, |
| 84 T value, |
| 85 bool warnIfNotFound = true); |
| 86 |
| 87 private: |
| 88 template<typename T> friend class SkRTConf; |
| 89 |
| 90 void registerConf(SkRTConfBase *conf); |
| 91 |
| 92 template <typename T> bool parse(const char *name, T* value); |
| 93 |
| 94 SkTDArray<SkString *> fConfigFileKeys, fConfigFileValues; |
| 95 typedef SkTDict< SkTDArray<SkRTConfBase *> * > ConfMap; |
| 96 ConfMap fConfs; |
| 97 |
| 98 template <typename T> |
| 99 friend bool test_rt_conf_parse(SkRTConfRegistry*, const char* name, T* value
); |
| 100 }; |
| 101 |
| 102 // our singleton registry |
| 103 |
| 104 SkRTConfRegistry &skRTConfRegistry(); |
| 105 |
| 106 template<typename T> |
| 107 SkRTConf<T>::SkRTConf(const char *name, const T &defaultValue, const char *descr
iption) |
| 108 : SkRTConfBase(name) |
| 109 , fValue(defaultValue) |
| 110 , fDefault(defaultValue) |
| 111 , fDescription(description) { |
| 112 |
| 113 T value; |
| 114 if (skRTConfRegistry().parse(fName.c_str(), &value)) { |
| 115 fValue = value; |
| 116 } |
| 117 skRTConfRegistry().registerConf(this); |
| 118 } |
| 119 |
| 120 template<typename T> |
| 121 void SkRTConf<T>::print(SkWStream *o) const { |
| 122 char outline[200]; // should be ok because we specify a max. width for every
thing here. |
| 123 char *outptr; |
| 124 if (strlen(getName()) >= 30) { |
| 125 o->writeText(getName()); |
| 126 o->writeText(" "); |
| 127 outptr = &(outline[0]); |
| 128 } else { |
| 129 sprintf(outline, "%-30.30s", getName()); |
| 130 outptr = &(outline[30]); |
| 131 } |
| 132 |
| 133 doPrint(outptr); |
| 134 sprintf(outptr+30, " %.128s", fDescription.c_str()); |
| 135 for (size_t i = strlen(outline); i --> 0 && ' ' == outline[i];) { |
| 136 outline[i] = '\0'; |
| 137 } |
| 138 o->writeText(outline); |
| 139 } |
| 140 |
| 141 template<typename T> |
| 142 void SkRTConf<T>::doPrint(char *s) const { |
| 143 sprintf(s, "%-30.30s", "How do I print myself??"); |
| 144 } |
| 145 |
| 146 template<> inline void SkRTConf<bool>::doPrint(char *s) const { |
| 147 char tmp[30]; |
| 148 sprintf(tmp, "%s # [%s]", fValue ? "true" : "false", fDefault ? "true" : "fa
lse"); |
| 149 sprintf(s, "%-30.30s", tmp); |
| 150 } |
| 151 |
| 152 template<> inline void SkRTConf<int>::doPrint(char *s) const { |
| 153 char tmp[30]; |
| 154 sprintf(tmp, "%d # [%d]", fValue, fDefault); |
| 155 sprintf(s, "%-30.30s", tmp); |
| 156 } |
| 157 |
| 158 template<> inline void SkRTConf<unsigned int>::doPrint(char *s) const { |
| 159 char tmp[30]; |
| 160 sprintf(tmp, "%u # [%u]", fValue, fDefault); |
| 161 sprintf(s, "%-30.30s", tmp); |
| 162 } |
| 163 |
| 164 template<> inline void SkRTConf<float>::doPrint(char *s) const { |
| 165 char tmp[30]; |
| 166 sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault); |
| 167 sprintf(s, "%-30.30s", tmp); |
| 168 } |
| 169 |
| 170 template<> inline void SkRTConf<double>::doPrint(char *s) const { |
| 171 char tmp[30]; |
| 172 sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault); |
| 173 sprintf(s, "%-30.30s", tmp); |
| 174 } |
| 175 |
| 176 template<> inline void SkRTConf<const char *>::doPrint(char *s) const { |
| 177 char tmp[30]; |
| 178 sprintf(tmp, "%s # [%s]", fValue, fDefault); |
| 179 sprintf(s, "%-30.30s", tmp); |
| 180 } |
| 181 |
| 182 template<typename T> |
| 183 bool SkRTConf<T>::equals(const SkRTConfBase *conf) const { |
| 184 // static_cast here is okay because there's only one kind of child class. |
| 185 const SkRTConf<T> *child_pointer = static_cast<const SkRTConf<T> *>(conf); |
| 186 return child_pointer && |
| 187 fName == child_pointer->fName && |
| 188 fDescription == child_pointer->fDescription && |
| 189 fValue == child_pointer->fValue && |
| 190 fDefault == child_pointer->fDefault; |
| 191 } |
| 192 |
| 193 #endif |
OLD | NEW |