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/////////////////////////////////////////////////////////////////////////// 
// 
// NAME 
// ParameterIO.h : read or write parameter value pairs 
// 
// DESCRIPTION 
//  Read or write program arguments and parameter values. 
// 
//  The arguments to the program are a list of parameter value pairs. 
//  These can be given on the command line, or read from a file 
//  or both (the command line overrides the file). 
// 
//  The program needs to know how large a value to write 
//  on output.  Therefore, this class is currently restricted 
//  to writing only the following types: 
//      %s  strings 
//      %f  floats 
//      %d  ints 
// 
// SEE ALSO 
//  ParameterIO.cpp       implementation of this class 
// 
// Copyright © Richard Szeliski, 2001. 
// See Copyright.h for more details 
// 
/////////////////////////////////////////////////////////////////////////// 
 
#include  
 
struct CParameterPair { 
    char* name;         // name string 
    char* format;       // format string 
    void* value_loc;    // location of value 
}; 
 
class CParameterIO { 
    // Read/write parameter name/value pairs to/from file or command line 
public: 
    void PushParamPair(char *name, char *format, void *value_loc); 
    void ReadFromStream(FILE *stream); 
    void ReadFromFile(const char *filename); 
    void ReadFromCommandLine(int argc, const char *argv[], 
                             bool warn_bad_name = true); 
    void WriteToStream(FILE *stream, bool single_line = false); 
    void WriteToFile(const char *filename); 
protected: 
    void ReadParamPair(const char *name, const char *value, 
                       bool warn_bad_name = true); 
    std::vector m_pp_list; 
}; 
 
#define PPPS(x)  PushParamPair(#x, "%s", &x) 
#define PPPF(x)  PushParamPair(#x, "%f", &x) 
#define PPPD(x)  PushParamPair(#x, "%d", &x) 
#define PPPH(v)  PushParamPair(#v, "0x%08x", &v)