revised implementation of script text

[l2e.git] / src / common / ScriptRunner.cpp

diff --git a/src/common/ScriptRunner.cpp b/src/common/ScriptRunner.cpp
index 110b702b88a86aad29297759e5b666940d203da5..c22a76bda797d34410849f2576f59c4c69f77dbf 100644 (file)
--- a/src/common/ScriptRunner.cpp
+++ b/src/common/ScriptRunner.cpp
@@ -20,12 +20,7 @@ ScriptRunner::ScriptRunner()
 : host(0)
 , script(0)
 , cursor(0)
-, address0(0)
-, address1(0)
-, integer0(0)
-, integer1(0)
-, vector0(0, 0)
-, vector1(0, 0) {
+, compare(0) {
 
 }
 
@@ -43,9 +38,7 @@ void ScriptRunner::Run(ScriptHost &h, const Script &s) {
        script = &s;
        Reset();
        while (cursor < script->textlen) {
-               unsigned char code(script->text[cursor]);
-               ++cursor;
-               Exec(code);
+               Exec(PopCode());
        }
        host = 0;
        script = 0;
@@ -53,58 +46,139 @@ void ScriptRunner::Run(ScriptHost &h, const Script &s) {
 
 void ScriptRunner::Reset() {
        cursor = 0;
-       address0 = 0;
-       address1 = 0;
-       integer0 = 0;
-       integer1 = 0;
-       vector0 = Vector<int>(0, 0);
-       vector1 = Vector<int>(0, 0);
+       for (int i(0); i < numRegisters; ++i) {
+               address[i] = 0;
+               integer[i] = 0;
+               vector[i] = Vector<int>(0, 0);
+       }
 }
 
-void ScriptRunner::Exec(unsigned char code) {
-       switch (code) {
-               case Script::CODE_MOVE_A0:
-                       address0 = PopAddress();
+void ScriptRunner::Exec(Script::Code code) {
+       switch (code.command) {
+               case Script::COMMAND_NOOP:
                        break;
-               case Script::CODE_MOVE_A1:
-                       address1 = PopAddress();
+
+               case Script::COMMAND_MOVE:
+                       if (code.reg1 >= numRegisters) {
+                               break;
+                       }
+                       switch (code.type) {
+                               case Script::TYPE_ADDRESS: {
+                                       void *value(code.reg2 < numRegisters ? address[code.reg2] : PopAddress());
+                                       address[code.reg1] = value;
+                                       break;
+                               }
+                               case Script::TYPE_INTEGER: {
+                                       int value(code.reg2 < numRegisters ? integer[code.reg2] : PopInt());
+                                       integer[code.reg1] = value;
+                                       break;
+                               }
+                               case Script::TYPE_VECTOR: {
+                                       Vector<int> value(code.reg2 < numRegisters ? vector[code.reg2] : PopVector());
+                                       vector[code.reg1] = value;
+                                       break;
+                               }
+                       }
                        break;
-               case Script::CODE_MOVE_I0:
-                       integer0 = PopInt();
+
+               case Script::COMMAND_ADD:
+                       if (code.reg1 >= numRegisters) {
+                               break;
+                       }
+                       switch (code.type) {
+                               case Script::TYPE_INTEGER: {
+                                       int value(code.reg2 < numRegisters ? integer[code.reg2] : PopInt());
+                                       integer[code.reg1] += value;
+                                       break;
+                               }
+                               case Script::TYPE_VECTOR: {
+                                       Vector<int> value(code.reg2 < numRegisters ? vector[code.reg2] : PopVector());
+                                       vector[code.reg1] += value;
+                                       break;
+                               }
+                       }
                        break;
-               case Script::CODE_MOVE_I1:
-                       integer1 = PopInt();
+
+               case Script::COMMAND_MOD: {
+                       if (code.reg1 >= numRegisters) {
+                               break;
+                       }
+                       int value(code.reg2 < numRegisters ? integer[code.reg2] : PopInt());
+                       integer[code.reg1] %= value;
                        break;
-               case Script::CODE_MOVE_V0:
-                       vector0 = PopVector();
+               }
+
+               case Script::COMMAND_RAND:
+                       if (code.reg1 >= numRegisters) {
+                               break;
+                       }
+                       integer[code.reg1] = std::rand();
+                       break;
+
+               case Script::COMMAND_CMP: {
+                       int lhs(code.reg1 < numRegisters ? integer[code.reg1] : PopInt());
+                       int rhs(code.reg2 < numRegisters ? integer[code.reg2] : PopInt());
+                       Compare(lhs, rhs);
                        break;
-               case Script::CODE_MOVE_V1:
-                       vector1 = PopVector();
+               }
+
+               case Script::COMMAND_JMP:
+                       cursor = PopInt();
                        break;
-               case Script::CODE_ADD_I0:
-                       integer0 += PopInt();
+               case Script::COMMAND_JEQ: {
+                       int addr(PopInt());
+                       if (compare == COMPARE_EQUAL) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_ADD_I1:
-                       integer1 += PopInt();
+               }
+               case Script::COMMAND_JNE: {
+                       int addr(PopInt());
+                       if (compare != COMPARE_EQUAL) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_ADD_V0:
-                       vector0 += PopVector();
+               }
+               case Script::COMMAND_JL: {
+                       int addr(PopInt());
+                       if (compare == COMPARE_LESS) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_ADD_V1:
-                       vector1 += PopVector();
+               }
+               case Script::COMMAND_JLE: {
+                       int addr(PopInt());
+                       if (compare != COMPARE_GREATER) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_RAND_I0:
-                       integer0 = std::rand();
+               }
+               case Script::COMMAND_JG: {
+                       int addr(PopInt());
+                       if (compare == COMPARE_GREATER) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_RAND_I1:
-                       integer1 = std::rand();
+               }
+               case Script::COMMAND_JGE: {
+                       int addr(PopInt());
+                       if (compare != COMPARE_LESS) {
+                               cursor = addr;
+                       }
                        break;
-               case Script::CODE_SYSCALL:
+               }
+               case Script::COMMAND_SYSC:
                        host->HandleSyscall(*this);
                        break;
        }
 }
 
+Script::Code ScriptRunner::PopCode() {
+       const Script::Code *i(reinterpret_cast<const Script::Code *>(script->text + cursor));
+       cursor += sizeof(Script::Code);
+       return *i;
+}
+
 void *ScriptRunner::PopAddress() {
        void *const *addr(reinterpret_cast<void *const *>(script->text + cursor));
        cursor += sizeof(void *);
@@ -123,4 +197,14 @@ const Vector<int> &ScriptRunner::PopVector() {
        return *vec;
 }
 
+void ScriptRunner::Compare(int lhs, int rhs) {
+       if (lhs < rhs) {
+               compare = COMPARE_LESS;
+       } else if (lhs > rhs) {
+               compare = COMPARE_GREATER;
+       } else {
+               compare = COMPARE_EQUAL;
+       }
+}
+
 }