src/common/ScriptRunner.cpp

   1 /*
   2  * ScriptRunner.cpp
   3  *
   4  *  Created on: Oct 13, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "ScriptRunner.h"
   9
  10 #include "Script.h"
  11 #include "ScriptHost.h"
  12
  13 #include <cstdlib>
  14
  15 using geometry::Vector;
  16
  17 namespace common {
  18
  19 ScriptRunner::ScriptRunner()
  20 : host(0)
  21 , script(0)
  22 , cursor(0)
  23 , address0(0)
  24 , address1(0)
  25 , integer0(0)
  26 , integer1(0)
  27 , vector0(0, 0)
  28 , vector1(0, 0) {
  29
  30 }
  31
  32 ScriptRunner::~ScriptRunner() {
  33
  34 }
  35
  36
  37 bool ScriptRunner::Running() const {
  38         return script && cursor < script->textlen;
  39 }
  40
  41 void ScriptRunner::Run(ScriptHost &h, const Script &s) {
  42         host = &h;
  43         script = &s;
  44         Reset();
  45         while (cursor < script->textlen) {
  46                 unsigned char code(script->text[cursor]);
  47                 ++cursor;
  48                 Exec(code);
  49         }
  50         host = 0;
  51         script = 0;
  52 }
  53
  54 void ScriptRunner::Reset() {
  55         cursor = 0;
  56         address0 = 0;
  57         address1 = 0;
  58         integer0 = 0;
  59         integer1 = 0;
  60         vector0 = Vector<int>(0, 0);
  61         vector1 = Vector<int>(0, 0);
  62 }
  63
  64 void ScriptRunner::Exec(unsigned char code) {
  65         switch (code) {
  66                 case Script::CODE_MOVE_A0:
  67                         address0 = PopAddress();
  68                         break;
  69                 case Script::CODE_MOVE_A1:
  70                         address1 = PopAddress();
  71                         break;
  72                 case Script::CODE_MOVE_I0:
  73                         integer0 = PopInt();
  74                         break;
  75                 case Script::CODE_MOVE_I1:
  76                         integer1 = PopInt();
  77                         break;
  78                 case Script::CODE_MOVE_V0:
  79                         vector0 = PopVector();
  80                         break;
  81                 case Script::CODE_MOVE_V1:
  82                         vector1 = PopVector();
  83                         break;
  84                 case Script::CODE_ADD_I0:
  85                         integer0 += PopInt();
  86                         break;
  87                 case Script::CODE_ADD_I1:
  88                         integer1 += PopInt();
  89                         break;
  90                 case Script::CODE_ADD_V0:
  91                         vector0 += PopVector();
  92                         break;
  93                 case Script::CODE_ADD_V1:
  94                         vector1 += PopVector();
  95                         break;
  96                 case Script::CODE_RAND_I0:
  97                         integer0 = std::rand();
  98                         break;
  99                 case Script::CODE_RAND_I1:
 100                         integer1 = std::rand();
 101                         break;
 102                 case Script::CODE_SYSCALL:
 103                         host->HandleSyscall(*this);
 104                         break;
 105         }
 106 }
 107
 108 void *ScriptRunner::PopAddress() {
 109         void *const *addr(reinterpret_cast<void *const *>(script->text + cursor));
 110         cursor += sizeof(void *);
 111         return *addr;
 112 }
 113
 114 int ScriptRunner::PopInt() {
 115         const int *i(reinterpret_cast<const int *>(script->text + cursor));
 116         cursor += sizeof(int);
 117         return *i;
 118 }
 119
 120 const Vector<int> &ScriptRunner::PopVector() {
 121         const Vector<int> *vec(reinterpret_cast<const Vector<int> *>(script->text + cursor));
 122         cursor += sizeof(Vector<int>);
 123         return *vec;
 124 }
 125
 126 }