SkRTConf: eliminate

include/utils/SkRTConf.h

-/*
- * Copyright 2013 Google, Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkRTConf_DEFINED
-#define SkRTConf_DEFINED
-
-#include "../private/SkTDArray.h"
-#include "../private/SkTDict.h"
-#include "SkString.h"
-#include "SkStream.h"
-
-/** \class SkRTConfBase
-    Non-templated base class for the runtime configs
-*/
-
-class SkRTConfBase {
-public:
-    SkRTConfBase(const char *name) : fName(name) {}
-    virtual ~SkRTConfBase() {}
-    virtual const char *getName() const { return fName.c_str(); }
-    virtual bool isDefault() const = 0;
-    virtual void print(SkWStream *o) const = 0;
-    virtual bool equals(const SkRTConfBase *conf) const = 0;
-protected:
-    SkString fName;
-};
-
-/** \class SkRTConf
-    A class to provide runtime configurability.
-*/
-template<typename T> class SkRTConf: public SkRTConfBase {
-public:
-    SkRTConf(const char *name, const T &defaultValue, const char *description);
-    operator const T&() const { return fValue; }
-    void print(SkWStream *o) const;
-    bool equals(const SkRTConfBase *conf) const;
-    bool isDefault() const { return fDefault == fValue; }
-    void set(const T& value) { fValue = value; }
-protected:
-    void doPrint(char *s) const;
-
-    T        fValue;
-    T        fDefault;
-    SkString fDescription;
-};
-
-#ifdef SK_DEBUG
-#define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description) static SkRTConf<confType> varName(confName, defaultValue, description)
-#define SK_CONF_SET(confname, value) \
-    skRTConfRegistry().set(confname, value, true)
-/* SK_CONF_TRY_SET() is like SK_CONF_SET(), but doesn't complain if
-   confname can't be found.  This is useful if the SK_CONF_DECLARE is
-   inside a source file whose linkage is dependent on the system. */
-#define SK_CONF_TRY_SET(confname, value) \
-    skRTConfRegistry().set(confname, value, false)
-#else
-#define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description) static confType varName = defaultValue
-#define SK_CONF_SET(confname, value) (void) confname, (void) value
-#define SK_CONF_TRY_SET(confname, value) (void) confname, (void) value
-#endif
-
-/** \class SkRTConfRegistry
-    A class that maintains a systemwide registry of all runtime configuration
-    parameters.  Mainly used for printing them out and handling multiply-defined
-    knobs.
-*/
-
-class SkRTConfRegistry {
-public:
-    SkRTConfRegistry();
-    ~SkRTConfRegistry();
-    void printAll(const char *fname = NULL) const;
-    bool hasNonDefault() const;
-    void printNonDefault(const char *fname = NULL) const;
-    const char *configFileLocation() const;
-    void possiblyDumpFile() const;
-    void validate() const;
-    template <typename T> void set(const char *confname,
-                                   T value,
-                                   bool warnIfNotFound = true);
-
-private:
-    template<typename T> friend class SkRTConf;
-
-    void registerConf(SkRTConfBase *conf);
-
-    template <typename T> bool parse(const char *name, T* value);
-
-    SkTDArray<SkString *> fConfigFileKeys, fConfigFileValues;
-    typedef SkTDict< SkTDArray<SkRTConfBase *> * > ConfMap;
-    ConfMap fConfs;
-
-    template <typename T>
-    friend bool test_rt_conf_parse(SkRTConfRegistry*, const char* name, T* value);
-};
-
-// our singleton registry
-
-SkRTConfRegistry &skRTConfRegistry();
-
-template<typename T>
-SkRTConf<T>::SkRTConf(const char *name, const T &defaultValue, const char *description)
-    : SkRTConfBase(name)
-    , fValue(defaultValue)
-    , fDefault(defaultValue)
-    , fDescription(description) {
-
-    T value;
-    if (skRTConfRegistry().parse(fName.c_str(), &value)) {
-        fValue = value;
-    }
-    skRTConfRegistry().registerConf(this);
-}
-
-template<typename T>
-void SkRTConf<T>::print(SkWStream *o) const {
-    char outline[200]; // should be ok because we specify a max. width for everything here.
-    char *outptr;
-    if (strlen(getName()) >= 30) {
-        o->writeText(getName());
-        o->writeText(" ");
-        outptr = &(outline[0]);
-    } else {
-        sprintf(outline, "%-30.30s", getName());
-        outptr = &(outline[30]);
-    }
-
-    doPrint(outptr);
-    sprintf(outptr+30, " %.128s", fDescription.c_str());
-    for (size_t i = strlen(outline); i --> 0 && ' ' == outline[i];) {
-        outline[i] = '\0';
-    }
-    o->writeText(outline);
-}
-
-template<typename T>
-void SkRTConf<T>::doPrint(char *s) const {
-    sprintf(s, "%-30.30s", "How do I print myself??");
-}
-
-template<> inline void SkRTConf<bool>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%s # [%s]", fValue ? "true" : "false", fDefault ? "true" : "false");
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<> inline void SkRTConf<int>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%d # [%d]", fValue, fDefault);
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<> inline void SkRTConf<unsigned int>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%u # [%u]", fValue, fDefault);
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<> inline void SkRTConf<float>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault);
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<> inline void SkRTConf<double>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault);
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<> inline void SkRTConf<const char *>::doPrint(char *s) const {
-    char tmp[30];
-    sprintf(tmp, "%s # [%s]", fValue, fDefault);
-    sprintf(s, "%-30.30s", tmp);
-}
-
-template<typename T>
-bool SkRTConf<T>::equals(const SkRTConfBase *conf) const {
-    // static_cast here is okay because there's only one kind of child class.
-    const SkRTConf<T> *child_pointer = static_cast<const SkRTConf<T> *>(conf);
-    return child_pointer &&
-           fName == child_pointer->fName &&
-           fDescription == child_pointer->fDescription &&
-           fValue == child_pointer->fValue &&
-           fDefault == child_pointer->fDefault;
-}
-
-#endif