eic-opticks/sysrap/sprop.h

0001 #pragma once
0002 /**
0003 sprop.h
0004 =========
0005
0006 Curiously when using a constexpr std::array for the PROP::
0007
0008     static constexpr std::array<sprop, 8> PROP =
0009     {{
0010         { 0,0,"RINDEX" },
0011         { 0,1,"ABSLENGTH" },
0012         { 0,2,"RAYLEIGH" },
0013         { 0,3,"REEMISSIONPROB" },
0014         { 1,0,"GROUPVEL" },
0015         { 1,1,"SPARE11"  },
0016         { 1,2,"SPARE12"  },
0017         { 1,3,"SPARE13"  },
0018     }};
0019
0020 Find that had to do the below in the cc to avoid link errors::
0021
0022     constexpr std::array<sprop,8> sprop_Material::PROP ;
0023
0024 To avoid that have rejigged to extract the PROP from
0025 a multiline constexpr string instead of the array.
0026 **/
0027
0028 #include <string>
0029 #include <vector>
0030 #include <array>
0031 #include <iomanip>
0032 #include <cassert>
0033
0034 #include "sstr.h"
0035
0036 struct sprop
0037 {
0038     enum { NUM_PAYLOAD_GRP = 2, NUM_PAYLOAD_VAL = 4, NUM_MATSUR = 4  } ;
0039
0040     int  group ;
0041     int  prop ;
0042     char name[16] ;
0043     double def ;
0044
0045     std::string desc() const ;
0046     bool parse(const char* str) ;
0047     bool match(int g, int v) const ;
0048
0049     static void Parse(std::vector<sprop>& prop, const char* lines );
0050     static std::string Desc(const std::vector<sprop>& prop);
0051     static void GetNames(std::vector<std::string>& pnames, const std::vector<sprop>& prop, const char* skip_prefix );
0052     static const sprop* FindProp(const std::vector<sprop>& prop, const char* pname );
0053     static const sprop* Find(const std::vector<sprop>& prop, int g, int v);
0054 };
0055
0056 inline std::string sprop::desc() const
0057 {
0058     std::stringstream ss ;
0059     ss << "(" << group << "," << prop << ") "
0060        << std::setw(20) << name
0061        << "[" << std::setw(15) << std::scientific << def << "]"  ;
0062     std::string s = ss.str();
0063     return s ;
0064 }
0065 inline bool sprop::parse(const char* str)
0066 {
0067     std::stringstream ss(str) ;
0068     ss >> group >> prop >> name >> def ;
0069     if (ss.fail()) return false ;
0070     return true ;
0071 }
0072 inline bool sprop::match(int g, int v) const
0073 {
0074     return group == g && prop == v ;
0075 }
0076
0077 inline void sprop::Parse(std::vector<sprop>& prop, const char* lines ) // static
0078 {
0079     std::stringstream ss;
0080     ss.str(lines) ;
0081     std::string s;
0082     while (std::getline(ss, s, '\n'))
0083     {
0084         const char* line = s.c_str() ;
0085         sprop p ;
0086         bool ok = p.parse(line) ;
0087         //std::cout << "[" << line << "]" << " " << ( ok ? p.desc() : "FAIL" ) << std::endl ;
0088         if(ok) prop.push_back(p) ;
0089     }
0090 }
0091 inline std::string sprop::Desc(const std::vector<sprop>& prop)  // static
0092 {
0093     std::stringstream ss ;
0094     for(unsigned i=0 ; i < prop.size() ; i++) ss << prop[i].desc() << std::endl;
0095     std::string s = ss.str();
0096     return s ;
0097 }
0098 inline void sprop::GetNames(std::vector<std::string>& pnames, const std::vector<sprop>& prop, const char* skip_prefix )  // static
0099 {
0100     for(unsigned i=0 ; i < prop.size() ; i++)
0101     {
0102         const char* name = prop[i].name ;
0103         if(sstr::MatchStart(name, skip_prefix) == false ) pnames.push_back(name) ;
0104     }
0105 }
0106 inline const sprop* sprop::FindProp(const std::vector<sprop>& prop, const char* pname)
0107 {
0108     const sprop* p = nullptr ;
0109     for(unsigned i=0 ; i < prop.size() ; i++) if(strcmp(prop[i].name, pname)==0) p = &prop[i] ;
0110     return p ;
0111 }
0112 inline const sprop* sprop::Find(const std::vector<sprop>& prop, int g, int v)
0113 {
0114     assert( g > -1 && g < NUM_PAYLOAD_GRP );
0115     assert( v > -1 && v < NUM_PAYLOAD_VAL );
0116     const sprop* p = nullptr ;
0117     for(unsigned i=0 ; i < prop.size() ; i++) if(prop[i].match(g,v)) p = &prop[i] ;
0118     return p ;
0119 }
0120
0121