*/
#include <stdlib.h>
#include <stdio.h>
+#include <stdarg.h>
#include <string.h>
#include "ast.h"
-#define ERRPTR ((void*)((intptr_t)0-1))
-
// === PROTOTYPES ===
-void Object_Dereference(tSpiderVariable *Object);
-void Object_Reference(tSpiderVariable *Object);
-tSpiderVariable *Object_CreateInteger(uint64_t Value);
-tSpiderVariable *Object_CreateReal(double Value);
-tSpiderVariable *Object_CreateString(int Length, const char *Data);
-tSpiderVariable *Object_CastTo(int Type, tSpiderVariable *Source);
- int Object_IsTrue(tSpiderVariable *Value);
+void Object_Dereference(tSpiderValue *Object);
+void Object_Reference(tSpiderValue *Object);
+tSpiderValue *SpiderScript_CreateInteger(uint64_t Value);
+tSpiderValue *SpiderScript_CreateReal(double Value);
+tSpiderValue *SpiderScript_CreateString(int Length, const char *Data);
+tSpiderValue *SpiderScript_CastValueTo(int Type, tSpiderValue *Source);
+ int SpiderScript_IsValueTrue(tSpiderValue *Value);
+void SpiderScript_FreeValue(tSpiderValue *Value);
+char *SpiderScript_DumpValue(tSpiderValue *Value);
+
+tSpiderValue *AST_ExecuteNode(tAST_BlockState *Block, tAST_Node *Node);
+tSpiderValue *AST_ExecuteNode_BinOp(tAST_BlockState *Block, int Operation, tSpiderValue *Left, tSpiderValue *Right);
+
+tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name);
+ int Variable_SetValue(tAST_BlockState *Block, const char *Name, tSpiderValue *Value);
+tSpiderValue *Variable_GetValue(tAST_BlockState *Block, const char *Name);
+void Variable_Destroy(tAST_Variable *Variable);
-void Variable_SetValue(tSpiderScript *Script, const char *Name, tSpiderVariable *Value);
-tSpiderVariable *Variable_GetValue(tSpiderScript *Script, const char *Name);
+void AST_RuntimeError(tAST_Node *Node, const char *Format, ...);
// === CODE ===
/**
* \brief Dereference a created object
*/
-void Object_Dereference(tSpiderVariable *Object)
+void Object_Dereference(tSpiderValue *Object)
{
+ if(!Object) return ;
+ if(Object == ERRPTR) return ;
Object->ReferenceCount --;
- if( Object->ReferenceCount == 0 ) free(Object);
+// printf("%p Dereferenced (%i)\n", Object, Object->ReferenceCount);
+ if( Object->ReferenceCount == 0 ) {
+ switch( (enum eSpiderScript_DataTypes) Object->Type )
+ {
+ case SS_DATATYPE_OBJECT:
+ Object->Object->Type->Destructor( Object->Object );
+ break;
+ case SS_DATATYPE_OPAQUE:
+ Object->Opaque.Destroy( Object->Opaque.Data );
+ break;
+ default:
+ break;
+ }
+ free(Object);
+ }
}
-void Object_Reference(tSpiderVariable *Object)
+void Object_Reference(tSpiderValue *Object)
{
+ if(!Object) return ;
Object->ReferenceCount ++;
+// printf("%p Referenced (%i)\n", Object, Object->ReferenceCount);
}
/**
* \brief Create an integer object
*/
-tSpiderVariable *Object_CreateInteger(uint64_t Value)
+tSpiderValue *SpiderScript_CreateInteger(uint64_t Value)
{
- tSpiderVariable *ret = malloc( sizeof(tSpiderVariable) );
+ tSpiderValue *ret = malloc( sizeof(tSpiderValue) );
ret->Type = SS_DATATYPE_INTEGER;
ret->ReferenceCount = 1;
ret->Integer = Value;
/**
* \brief Create an real number object
*/
-tSpiderVariable *Object_CreateReal(double Value)
+tSpiderValue *SpiderScript_CreateReal(double Value)
{
- tSpiderVariable *ret = malloc( sizeof(tSpiderVariable) );
+ tSpiderValue *ret = malloc( sizeof(tSpiderValue) );
ret->Type = SS_DATATYPE_REAL;
ret->ReferenceCount = 1;
ret->Real = Value;
/**
* \brief Create an string object
*/
-tSpiderVariable *Object_CreateString(int Length, const char *Data)
+tSpiderValue *SpiderScript_CreateString(int Length, const char *Data)
{
- tSpiderVariable *ret = malloc( sizeof(tSpiderVariable) + Length + 1 );
+ tSpiderValue *ret = malloc( sizeof(tSpiderValue) + Length + 1 );
ret->Type = SS_DATATYPE_STRING;
ret->ReferenceCount = 1;
ret->String.Length = Length;
}
/**
+ * \brief Concatenate two strings
+ */
+tSpiderValue *Object_StringConcat(tSpiderValue *Str1, tSpiderValue *Str2)
+{
+ int newLen = 0;
+ tSpiderValue *ret;
+ if(Str1) newLen += Str1->String.Length;
+ if(Str2) newLen += Str2->String.Length;
+ ret = malloc( sizeof(tSpiderValue) + newLen + 1 );
+ ret->Type = SS_DATATYPE_STRING;
+ ret->ReferenceCount = 1;
+ ret->String.Length = newLen;
+ if(Str1)
+ memcpy(ret->String.Data, Str1->String.Data, Str1->String.Length);
+ if(Str2) {
+ if(Str1)
+ memcpy(ret->String.Data+Str1->String.Length, Str2->String.Data, Str2->String.Length);
+ else
+ memcpy(ret->String.Data, Str2->String.Data, Str2->String.Length);
+ }
+ ret->String.Data[ newLen ] = '\0';
+ return ret;
+}
+
+/**
+ * \brief Cast one object to another
+ * \brief Type Destination type
+ * \brief Source Input data
*/
-tSpiderVariable *Object_CastTo(int Type, tSpiderVariable *Source)
+tSpiderValue *SpiderScript_CastValueTo(int Type, tSpiderValue *Source)
{
- tSpiderVariable *ret;
+ tSpiderValue *ret = ERRPTR;
+ int len = 0;
+
+ if( !Source ) return NULL;
+
// Check if anything needs to be done
if( Source->Type == Type ) {
Object_Reference(Source);
return Source;
}
- switch(Type)
+ switch( (enum eSpiderScript_DataTypes)Type )
{
case SS_DATATYPE_UNDEF:
- case SS_DATATYPE_NULL:
case SS_DATATYPE_ARRAY:
- fprintf(stderr, "Object_CastTo - Invalid cast to %i\n", Type);
+ case SS_DATATYPE_OPAQUE:
+ AST_RuntimeError(NULL, "Invalid cast to %i", Type);
return ERRPTR;
case SS_DATATYPE_INTEGER:
- ret = malloc(sizeof(tSpiderVariable));
+ ret = malloc(sizeof(tSpiderValue));
ret->Type = SS_DATATYPE_INTEGER;
ret->ReferenceCount = 1;
switch(Source->Type)
case SS_DATATYPE_STRING: ret->Integer = atoi(Source->String.Data); break;
case SS_DATATYPE_REAL: ret->Integer = Source->Real; break;
default:
- fprintf(stderr, "Object_CastTo - Invalid cast from %i\n", Source->Type);
+ AST_RuntimeError(NULL, "Invalid cast from %i to Integer", Source->Type);
+ free(ret);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+
+ case SS_DATATYPE_STRING:
+ switch(Source->Type)
+ {
+ case SS_DATATYPE_INTEGER: len = snprintf(NULL, 0, "%li", Source->Integer); break;
+ case SS_DATATYPE_REAL: snprintf(NULL, 0, "%f", Source->Real); break;
+ default: break;
+ }
+ ret = malloc(sizeof(tSpiderValue) + len + 1);
+ ret->Type = SS_DATATYPE_STRING;
+ ret->ReferenceCount = 1;
+ ret->String.Length = len;
+ switch(Source->Type)
+ {
+ case SS_DATATYPE_INTEGER: sprintf(ret->String.Data, "%li", Source->Integer); break;
+ case SS_DATATYPE_REAL: sprintf(ret->String.Data, "%f", Source->Real); break;
+ default:
+ AST_RuntimeError(NULL, "Invalid cast from %i to String", Source->Type);
+ free(ret);
+ ret = ERRPTR;
break;
}
break;
+
+ default:
+ AST_RuntimeError(NULL, "BUG - BUG REPORT: Unimplemented cast target");
+ break;
}
return ret;
/**
* \brief Condenses a value down to a boolean
*/
-int Object_IsTrue(tSpiderVariable *Value)
+int SpiderScript_IsValueTrue(tSpiderValue *Value)
{
- switch(Value->Type)
+ if( Value == ERRPTR ) return 0;
+ if( Value == NULL ) return 0;
+
+ switch( (enum eSpiderScript_DataTypes)Value->Type )
{
case SS_DATATYPE_UNDEF:
- case SS_DATATYPE_NULL:
return 0;
case SS_DATATYPE_INTEGER:
case SS_DATATYPE_OBJECT:
return Value->Object != NULL;
+ case SS_DATATYPE_OPAQUE:
+ return Value->Opaque.Data != NULL;
+
case SS_DATATYPE_ARRAY:
return Value->Array.Length > 0;
+ default:
+ AST_RuntimeError(NULL, "Unknown type %i in SpiderScript_IsValueTrue", Value->Type);
+ return 0;
}
return 0;
}
-tSpiderVariable *AST_ExecuteNode(tSpiderScript *Script, tAST_Node *Node)
+/**
+ * \brief Free a value
+ * \note Just calls Object_Dereference
+ */
+void SpiderScript_FreeValue(tSpiderValue *Value)
+{
+ Object_Dereference(Value);
+}
+
+/**
+ * \brief Dump a value into a string
+ * \return Heap string
+ */
+char *SpiderScript_DumpValue(tSpiderValue *Value)
+{
+ char *ret;
+ if( Value == ERRPTR )
+ return strdup("ERRPTR");
+ if( Value == NULL )
+ return strdup("null");
+
+ switch( (enum eSpiderScript_DataTypes)Value->Type )
+ {
+ case SS_DATATYPE_UNDEF: return strdup("undefined");
+
+ case SS_DATATYPE_INTEGER:
+ ret = malloc( sizeof(Value->Integer)*2 + 3 );
+ sprintf(ret, "0x%lx", Value->Integer);
+ return ret;
+
+ case SS_DATATYPE_REAL:
+ ret = malloc( sprintf(NULL, "%f", Value->Real) + 1 );
+ sprintf(ret, "%f", Value->Real);
+ return ret;
+
+ case SS_DATATYPE_STRING:
+ ret = malloc( Value->String.Length + 3 );
+ ret[0] = '"';
+ strcpy(ret+1, Value->String.Data);
+ ret[Value->String.Length+1] = '"';
+ ret[Value->String.Length+2] = '\0';
+ return ret;
+
+ case SS_DATATYPE_OBJECT:
+ ret = malloc( sprintf(NULL, "{%s *%p}", Value->Object->Type->Name, Value->Object) + 1 );
+ sprintf(ret, "{%s *%p}", Value->Object->Type->Name, Value->Object);
+ return ret;
+
+ case SS_DATATYPE_OPAQUE:
+ ret = malloc( sprintf(NULL, "*%p", Value->Opaque.Data) + 1 );
+ sprintf(ret, "*%p", Value->Opaque.Data);
+ return ret;
+
+ case SS_DATATYPE_ARRAY:
+ return strdup("Array");
+
+ default:
+ AST_RuntimeError(NULL, "Unknown type %i in Object_Dump", Value->Type);
+ return NULL;
+ }
+
+}
+
+/**
+ * \brief Execute an AST node and return its value
+ */
+tSpiderValue *AST_ExecuteNode(tAST_BlockState *Block, tAST_Node *Node)
{
tAST_Node *node;
- tSpiderVariable *ret, *tmpvar;
- tSpiderVariable *op1, *op2; // Binary operations
+ tSpiderValue *ret = NULL, *tmpobj;
+ tSpiderValue *op1, *op2; // Binary operations
int cmp; // Used in comparisons
switch(Node->Type)
{
// No Operation
- case NODETYPE_NOP: ret = NULL; break ;
+ case NODETYPE_NOP: ret = NULL; break;
// Code block
case NODETYPE_BLOCK:
- ret = NULL;
- for(node = Node->Block.FirstChild; node; node = node->NextSibling )
{
- if(node->Type == NODETYPE_RETURN) {
- ret = AST_ExecuteNode(Script, node);
- break ;
+ tAST_BlockState blockInfo;
+ blockInfo.FirstVar = NULL;
+ blockInfo.RetVal = NULL;
+ blockInfo.Parent = Block;
+ blockInfo.Script = Block->Script;
+ ret = NULL;
+ for(node = Node->Block.FirstChild; node && !blockInfo.RetVal; node = node->NextSibling )
+ {
+ tmpobj = AST_ExecuteNode(&blockInfo, node);
+ if(tmpobj == ERRPTR) { // Error check
+ ret = ERRPTR;
+ break ;
+ }
+ if(tmpobj) Object_Dereference(tmpobj); // Free unused value
+ tmpobj = NULL;
}
- else {
- tmpvar = AST_ExecuteNode(Script, node);
- if(tmpvar == ERRPTR) return ERRPTR; // Error check
- if(tmpvar) Object_Dereference(tmpvar); // Free unused value
+ // Clean up variables
+ while(blockInfo.FirstVar)
+ {
+ tAST_Variable *nextVar = blockInfo.FirstVar->Next;
+ Variable_Destroy( blockInfo.FirstVar );
+ blockInfo.FirstVar = nextVar;
}
+
+ if( blockInfo.RetVal )
+ Block->RetVal = blockInfo.RetVal;
}
+
break;
// Assignment
case NODETYPE_ASSIGN:
if( Node->Assign.Dest->Type != NODETYPE_VARIABLE ) {
- fprintf(stderr, "Syntax error: LVALUE of assignment is not a variable\n");
+ AST_RuntimeError(Node, "LVALUE of assignment is not a variable");
+ return ERRPTR;
+ }
+ ret = AST_ExecuteNode(Block, Node->Assign.Value);
+ if(ret == ERRPTR)
+ return ERRPTR;
+
+ if( Node->Assign.Operation != NODETYPE_NOP )
+ {
+ tSpiderValue *varVal = Variable_GetValue(Block, Node->Assign.Dest->Variable.Name);
+ tSpiderValue *value;
+ value = AST_ExecuteNode_BinOp(Block, Node->Assign.Operation, varVal, ret);
+ if( value == ERRPTR )
+ return ERRPTR;
+ if(ret) Object_Dereference(ret);
+ Object_Dereference(varVal);
+ ret = value;
+ }
+
+ if( Variable_SetValue( Block, Node->Assign.Dest->Variable.Name, ret ) ) {
+ Object_Dereference( ret );
return ERRPTR;
}
- ret = AST_ExecuteNode(Script, Node->Assign.Value);
- // TODO: Apply operation
- Variable_SetValue( Script, Node->Assign.Dest->Variable.Name, ret );
break;
+ // Function Call
case NODETYPE_FUNCTIONCALL:
- // TODO: Find a function from the export list in variant
- //SpiderScript_ExecuteMethod(Script, Node->FunctionCall.Name
- ret = ERRPTR;
- fprintf(stderr, "TODO: Implement function calls\n");
+ {
+ int nParams = 0;
+ for(node = Node->FunctionCall.FirstArg; node; node = node->NextSibling) {
+ nParams ++;
+ }
+ // Logical block (used to allocate `params`)
+ {
+ tSpiderValue *params[nParams];
+ int i=0;
+ for(node = Node->FunctionCall.FirstArg; node; node = node->NextSibling) {
+ params[i] = AST_ExecuteNode(Block, node);
+ if( params[i] == ERRPTR ) {
+ while(i--) Object_Dereference(params[i]);
+ ret = ERRPTR;
+ goto _return;
+ }
+ i ++;
+ }
+
+ // Call the function (SpiderScript_ExecuteMethod does the
+ // required namespace handling)
+ ret = SpiderScript_ExecuteMethod(Block->Script, Node->FunctionCall.Name, nParams, params);
+
+ // Dereference parameters
+ while(i--) Object_Dereference(params[i]);
+
+ // falls out
+ }
+ }
break;
- // Return's special handling happens elsewhere
+ // Conditional
+ case NODETYPE_IF:
+ ret = AST_ExecuteNode(Block, Node->If.Condition);
+ if( SpiderScript_IsValueTrue(ret) ) {
+ Object_Dereference(AST_ExecuteNode(Block, Node->If.True));
+ }
+ else {
+ Object_Dereference(AST_ExecuteNode(Block, Node->If.False));
+ }
+ Object_Dereference(ret);
+ ret = NULL;
+ break;
+
+ // Loop
+ case NODETYPE_LOOP:
+ ret = AST_ExecuteNode(Block, Node->For.Init);
+ if( Node->For.bCheckAfter )
+ {
+ do {
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Code);
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Increment);
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Condition);
+ } while( SpiderScript_IsValueTrue(ret) );
+ }
+ else
+ {
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Condition);
+ while( SpiderScript_IsValueTrue(ret) ) {
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Code);
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Increment);
+ Object_Dereference(ret);
+ ret = AST_ExecuteNode(Block, Node->For.Condition);
+ }
+ }
+ Object_Dereference(ret);
+ ret = NULL;
+ break;
+
+ // Return
case NODETYPE_RETURN:
- ret = AST_ExecuteNode(Script, Node->UniOp.Value);
+ ret = AST_ExecuteNode(Block, Node->UniOp.Value);
+ Block->RetVal = ret; // Return value set
+ //Object_Reference(ret); // Make sure it exists after return
+ ret = NULL; // the `return` statement does not return a value
break;
- // Variable
- case NODETYPE_VARIABLE: ret = Variable_GetValue( Script, Node->Variable.Name ); break;
+ // Define a variable
+ case NODETYPE_DEFVAR:
+ ret = NULL;
+ if( Variable_Define(Block, Node->DefVar.DataType, Node->DefVar.Name) == ERRPTR )
+ ret = ERRPTR;
+ break;
+ // Variable
+ case NODETYPE_VARIABLE:
+ ret = Variable_GetValue( Block, Node->Variable.Name );
+ break;
+
+ // Cast a value to another
+ case NODETYPE_CAST:
+ {
+ tSpiderValue *tmp = AST_ExecuteNode(Block, Node->Cast.Value);
+ ret = SpiderScript_CastValueTo( Node->Cast.DataType, tmp );
+ Object_Dereference(tmp);
+ }
+ break;
+
+ // Index into an array
+ case NODETYPE_INDEX:
+ AST_RuntimeError(Node, "TODO - Array Indexing");
+ ret = ERRPTR;
+ break;
+
// TODO: Implement runtime constants
- case NODETYPE_CONSTANT: ret = ERRPTR; break;
+ case NODETYPE_CONSTANT:
+ AST_RuntimeError(Node, "TODO - Runtime Constants");
+ ret = ERRPTR;
+ break;
// Constant Values
- case NODETYPE_STRING: ret = Object_CreateString( Node->String.Length, Node->String.Data ); break;
- case NODETYPE_INTEGER: ret = Object_CreateInteger( Node->Integer ); break;
- case NODETYPE_REAL: ret = Object_CreateReal( Node->Real ); break;
+ case NODETYPE_STRING: ret = SpiderScript_CreateString( Node->String.Length, Node->String.Data ); break;
+ case NODETYPE_INTEGER: ret = SpiderScript_CreateInteger( Node->Integer ); break;
+ case NODETYPE_REAL: ret = SpiderScript_CreateReal( Node->Real ); break;
// --- Operations ---
// Boolean Operations
case NODETYPE_LOGICALAND: // Logical AND (&&)
case NODETYPE_LOGICALOR: // Logical OR (||)
case NODETYPE_LOGICALXOR: // Logical XOR (^^)
- op1 = AST_ExecuteNode(Script, Node->BinOp.Left);
- op2 = AST_ExecuteNode(Script, Node->BinOp.Right);
+ op1 = AST_ExecuteNode(Block, Node->BinOp.Left);
+ if(op1 == ERRPTR) return ERRPTR;
+ op2 = AST_ExecuteNode(Block, Node->BinOp.Right);
+ if(op2 == ERRPTR) {
+ Object_Dereference(op1);
+ return ERRPTR;
+ }
+
switch( Node->Type )
{
case NODETYPE_LOGICALAND:
- ret = Object_CreateInteger( Object_IsTrue(op1) && Object_IsTrue(op2) );
+ ret = SpiderScript_CreateInteger( SpiderScript_IsValueTrue(op1) && SpiderScript_IsValueTrue(op2) );
break;
case NODETYPE_LOGICALOR:
- ret = Object_CreateInteger( Object_IsTrue(op1) || Object_IsTrue(op2) );
+ ret = SpiderScript_CreateInteger( SpiderScript_IsValueTrue(op1) || SpiderScript_IsValueTrue(op2) );
break;
case NODETYPE_LOGICALXOR:
- ret = Object_CreateInteger( Object_IsTrue(op1) ^ Object_IsTrue(op2) );
+ ret = SpiderScript_CreateInteger( SpiderScript_IsValueTrue(op1) ^ SpiderScript_IsValueTrue(op2) );
break;
default: break;
}
+
+ // Free intermediate objects
+ Object_Dereference(op1);
+ Object_Dereference(op2);
break;
// Comparisons
case NODETYPE_EQUALS:
case NODETYPE_LESSTHAN:
case NODETYPE_GREATERTHAN:
- op1 = AST_ExecuteNode(Script, Node->BinOp.Left);
- op2 = AST_ExecuteNode(Script, Node->BinOp.Right);
-
- // No conversion done for NULL
- // TODO: Determine if this will ever be needed
- if( op1->Type == SS_DATATYPE_NULL )
- {
- // NULLs always typecheck
- ret = Object_CreateInteger(op2->Type == SS_DATATYPE_NULL);
- break;
+ op1 = AST_ExecuteNode(Block, Node->BinOp.Left);
+ if(op1 == ERRPTR) return ERRPTR;
+ op2 = AST_ExecuteNode(Block, Node->BinOp.Right);
+ if(op2 == ERRPTR) {
+ Object_Dereference(op1);
+ return ERRPTR;
}
// Convert types
if( op1->Type != op2->Type ) {
// If dynamically typed, convert op2 to op1's type
- if(Script->Variant->bDyamicTyped)
+ if(Block->Script->Variant->bDyamicTyped)
{
- tmpvar = op2;
- op2 = Object_CastTo(op1->Type, op2);
- Object_Dereference(tmpvar);
+ tmpobj = op2;
+ op2 = SpiderScript_CastValueTo(op1->Type, op2);
+ Object_Dereference(tmpobj);
+ if(op2 == ERRPTR) {
+ Object_Dereference(op1);
+ return ERRPTR;
+ }
}
// If statically typed, this should never happen, but catch it anyway
else {
+ AST_RuntimeError(Node, "Statically typed implicit cast");
ret = ERRPTR;
break;
}
// Do operation
switch(op1->Type)
{
- // - NULL
- case SS_DATATYPE_NULL: break;
// - String Compare (does a strcmp, well memcmp)
case SS_DATATYPE_STRING:
// Call memcmp to do most of the work
cmp = -1;
}
break;
+
+ // - Integer Comparisons
+ case SS_DATATYPE_INTEGER:
+ if( op1->Integer == op2->Integer )
+ cmp = 0;
+ else if( op1->Integer < op2->Integer )
+ cmp = -1;
+ else
+ cmp = 1;
+ break;
+ default:
+ AST_RuntimeError(Node, "TODO - Comparison of type %i", op1->Type);
+ ret = ERRPTR;
+ break;
}
// Free intermediate objects
Object_Dereference(op1);
Object_Dereference(op2);
+ // Error check
+ if( ret == ERRPTR )
+ break;
+
// Create return
switch(Node->Type)
{
- case NODETYPE_EQUALS: ret = Object_CreateInteger(cmp == 0); break;
- case NODETYPE_LESSTHAN: ret = Object_CreateInteger(cmp < 0); break;
- case NODETYPE_GREATERTHAN: ret = Object_CreateInteger(cmp > 0); break;
+ case NODETYPE_EQUALS: ret = SpiderScript_CreateInteger(cmp == 0); break;
+ case NODETYPE_LESSTHAN: ret = SpiderScript_CreateInteger(cmp < 0); break;
+ case NODETYPE_GREATERTHAN: ret = SpiderScript_CreateInteger(cmp > 0); break;
default:
- fprintf(stderr, "SpiderScript internal error: Exec,CmpOp unknown op %i", Node->Type);
+ AST_RuntimeError(Node, "Exec,CmpOp unknown op %i", Node->Type);
ret = ERRPTR;
break;
}
case NODETYPE_BITSHIFTRIGHT:
case NODETYPE_BITROTATELEFT:
// Get operands
- op1 = AST_ExecuteNode(Script, Node->BinOp.Left);
- op2 = AST_ExecuteNode(Script, Node->BinOp.Right);
+ op1 = AST_ExecuteNode(Block, Node->BinOp.Left);
+ if(op1 == ERRPTR) return ERRPTR;
+ op2 = AST_ExecuteNode(Block, Node->BinOp.Right);
+ if(op2 == ERRPTR) {
+ Object_Dereference(op1);
+ return ERRPTR;
+ }
- // Convert types
- if( op1->Type != op2->Type ) {
- // If dynamically typed, convert op2 to op1's type
- if(Script->Variant->bDyamicTyped)
+ ret = AST_ExecuteNode_BinOp(Block, Node->Type, op1, op2);
+
+ // Free intermediate objects
+ Object_Dereference(op1);
+ Object_Dereference(op2);
+ break;
+
+ //default:
+ // ret = NULL;
+ // AST_RuntimeError(Node, "BUG - SpiderScript AST_ExecuteNode Unimplemented %i\n", Node->Type);
+ // break;
+ }
+_return:
+ return ret;
+}
+
+tSpiderValue *AST_ExecuteNode_BinOp(tAST_BlockState *Block, int Operation, tSpiderValue *Left, tSpiderValue *Right)
+{
+ tSpiderValue *preCastValue = Right;
+ tSpiderValue *ret;
+
+ // Convert types
+ if( Left && Right && Left->Type != Right->Type )
+ {
+ #if 0
+ // Object types
+ // - Operator overload functions
+ if( Left->Type == SS_DATATYPE_OBJECT )
+ {
+ const char *fcnname;
+ switch(Operation)
{
- tmpvar = op2;
- op2 = Object_CastTo(op1->Type, op2);
- Object_Dereference(tmpvar);
+ case NODETYPE_ADD: fcnname = "+"; break;
+ case NODETYPE_SUBTRACT: fcnname = "-"; break;
+ case NODETYPE_MULTIPLY: fcnname = "*"; break;
+ case NODETYPE_DIVIDE: fcnname = "/"; break;
+ case NODETYPE_MODULO: fcnname = "%"; break;
+ case NODETYPE_BWAND: fcnname = "&"; break;
+ case NODETYPE_BWOR: fcnname = "|"; break;
+ case NODETYPE_BWXOR: fcnname = "^"; break;
+ case NODETYPE_BITSHIFTLEFT: fcnname = "<<"; break;
+ case NODETYPE_BITSHIFTRIGHT:fcnname = ">>"; break;
+ case NODETYPE_BITROTATELEFT:fcnname = "<<<"; break;
+ default: fcnname = NULL; break;
}
- // If statically typed, this should never happen, but catch it anyway
- else {
- ret = ERRPTR;
- break;
+
+ if( fcnname )
+ {
+ ret = Object_ExecuteMethod(Left->Object, fcnname, Right);
+ if( ret != ERRPTR )
+ return ret;
+ // Fall through and try casting (which will usually fail)
}
}
+ #endif
- // Do operation
- switch(op1->Type)
+ // If implicit casts are allowed, convert Right to Left's type
+ if(Block->Script->Variant->bImplicitCasts)
{
- case SS_DATATYPE_NULL: break;
- // String Concatenation
- case SS_DATATYPE_STRING:
- switch(Node->Type)
- {
- default:
- fprintf(stderr, "SpiderScript internal error: Exec,BinOP,String unknown op %i", Node->Type);
- ret = ERRPTR;
- break;
- }
+ Right = SpiderScript_CastValueTo(Left->Type, Right);
+ if(Right == ERRPTR)
+ return ERRPTR;
+ }
+ // If statically typed, this should never happen, but catch it anyway
+ else {
+ AST_RuntimeError(NULL, "Implicit cast not allowed (from %i to %i)\n", Right->Type, Left->Type);
+ return ERRPTR;
+ }
+ }
+
+ // NULL Check
+ if( Left == NULL || Right == NULL ) {
+ if(Right && Right != preCastValue) free(Right);
+ return NULL;
+ }
+
+ // Do operation
+ switch(Left->Type)
+ {
+ // String Concatenation
+ case SS_DATATYPE_STRING:
+ switch(Operation)
+ {
+ case NODETYPE_ADD: // Concatenate
+ ret = Object_StringConcat(Left, Right);
break;
- case SS_DATATYPE_INTEGER:
- switch(Node->Type)
- {
- case NODETYPE_ADD: ret = Object_CreateInteger( op1->Integer + op2->Integer ); break;
- case NODETYPE_SUBTRACT: ret = Object_CreateInteger( op1->Integer - op2->Integer ); break;
- case NODETYPE_MULTIPLY: ret = Object_CreateInteger( op1->Integer * op2->Integer ); break;
- case NODETYPE_DIVIDE: ret = Object_CreateInteger( op1->Integer / op2->Integer ); break;
- case NODETYPE_MODULO: ret = Object_CreateInteger( op1->Integer % op2->Integer ); break;
- case NODETYPE_BWAND: ret = Object_CreateInteger( op1->Integer & op2->Integer ); break;
- case NODETYPE_BWOR: ret = Object_CreateInteger( op1->Integer | op2->Integer ); break;
- case NODETYPE_BWXOR: ret = Object_CreateInteger( op1->Integer ^ op2->Integer ); break;
- case NODETYPE_BITSHIFTLEFT: ret = Object_CreateInteger( op1->Integer << op2->Integer ); break;
- case NODETYPE_BITSHIFTRIGHT:ret = Object_CreateInteger( op1->Integer >> op2->Integer ); break;
- case NODETYPE_BITROTATELEFT:
- ret = Object_CreateInteger( (op1->Integer << op2->Integer) | (op1->Integer >> (64-op2->Integer)) );
- break;
- default:
- fprintf(stderr, "SpiderScript internal error: Exec,BinOP,Integer unknown op %i", Node->Type);
- ret = ERRPTR;
- break;
- }
+ default:
+ AST_RuntimeError(NULL, "SpiderScript internal error: Exec,BinOP,String unknown op %i", Operation);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+ // Integer Operations
+ case SS_DATATYPE_INTEGER:
+ switch(Operation)
+ {
+ case NODETYPE_ADD: ret = SpiderScript_CreateInteger( Left->Integer + Right->Integer ); break;
+ case NODETYPE_SUBTRACT: ret = SpiderScript_CreateInteger( Left->Integer - Right->Integer ); break;
+ case NODETYPE_MULTIPLY: ret = SpiderScript_CreateInteger( Left->Integer * Right->Integer ); break;
+ case NODETYPE_DIVIDE: ret = SpiderScript_CreateInteger( Left->Integer / Right->Integer ); break;
+ case NODETYPE_MODULO: ret = SpiderScript_CreateInteger( Left->Integer % Right->Integer ); break;
+ case NODETYPE_BWAND: ret = SpiderScript_CreateInteger( Left->Integer & Right->Integer ); break;
+ case NODETYPE_BWOR: ret = SpiderScript_CreateInteger( Left->Integer | Right->Integer ); break;
+ case NODETYPE_BWXOR: ret = SpiderScript_CreateInteger( Left->Integer ^ Right->Integer ); break;
+ case NODETYPE_BITSHIFTLEFT: ret = SpiderScript_CreateInteger( Left->Integer << Right->Integer ); break;
+ case NODETYPE_BITSHIFTRIGHT:ret = SpiderScript_CreateInteger( Left->Integer >> Right->Integer ); break;
+ case NODETYPE_BITROTATELEFT:
+ ret = SpiderScript_CreateInteger( (Left->Integer << Right->Integer) | (Left->Integer >> (64-Right->Integer)) );
+ break;
+ default:
+ AST_RuntimeError(NULL, "SpiderScript internal error: Exec,BinOP,Integer unknown op %i\n", Operation);
+ ret = ERRPTR;
break;
}
-
- // Free intermediate objects
- Object_Dereference(op1);
- Object_Dereference(op2);
break;
- //default:
- // ret = NULL;
- // fprintf(stderr, "ERROR: SpiderScript AST_ExecuteNode Unimplemented %i\n", Node->Type);
- // break;
+ // Real Numbers
+ case SS_DATATYPE_REAL:
+ switch(Operation)
+ {
+ default:
+ AST_RuntimeError(NULL, "SpiderScript internal error: Exec,BinOP,Real unknown op %i", Operation);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+
+ default:
+ AST_RuntimeError(NULL, "BUG - Invalid operation (%i) on type (%i)", Operation, Left->Type);
+ ret = ERRPTR;
+ break;
}
+
+ if(Right && Right != preCastValue) free(Right);
+
return ret;
}
+
+/**
+ * \brief Define a variable
+ * \param Block Current block state
+ * \param Type Type of the variable
+ * \param Name Name of the variable
+ * \return Boolean Failure
+ */
+tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name)
+{
+ tAST_Variable *var, *prev = NULL;
+
+ for( var = Block->FirstVar; var; prev = var, var = var->Next )
+ {
+ if( strcmp(var->Name, Name) == 0 ) {
+ AST_RuntimeError(NULL, "Redefinition of variable '%s'", Name);
+ return ERRPTR;
+ }
+ }
+
+ var = malloc( sizeof(tAST_Variable) + strlen(Name) + 1 );
+ var->Next = NULL;
+ var->Type = Type;
+ var->Object = NULL;
+ strcpy(var->Name, Name);
+
+ if(prev) prev->Next = var;
+ else Block->FirstVar = var;
+
+ //printf("Defined variable %s (%i)\n", Name, Type);
+
+ return var;
+}
+
+/**
+ * \brief Set the value of a variable
+ * \return Boolean Failure
+ */
+int Variable_SetValue(tAST_BlockState *Block, const char *Name, tSpiderValue *Value)
+{
+ tAST_Variable *var;
+ tAST_BlockState *bs;
+
+ for( bs = Block; bs; bs = bs->Parent )
+ {
+ for( var = bs->FirstVar; var; var = var->Next )
+ {
+ if( strcmp(var->Name, Name) == 0 )
+ {
+ if( !Block->Script->Variant->bDyamicTyped
+ && (Value && var->Type != Value->Type) )
+ {
+ AST_RuntimeError(NULL, "Type mismatch assigning to '%s'", Name);
+ return -2;
+ }
+// printf("Assign %p to '%s'\n", Value, var->Name);
+ Object_Reference(Value);
+ Object_Dereference(var->Object);
+ var->Object = Value;
+ return 0;
+ }
+ }
+ }
+
+ if( Block->Script->Variant->bDyamicTyped )
+ {
+ // Define variable
+ var = Variable_Define(Block, Value->Type, Name);
+ Object_Reference(Value);
+ var->Object = Value;
+ return 0;
+ }
+ else
+ {
+ AST_RuntimeError(NULL, "Variable '%s' set while undefined", Name);
+ return -1;
+ }
+}
+
+/**
+ * \brief Get the value of a variable
+ */
+tSpiderValue *Variable_GetValue(tAST_BlockState *Block, const char *Name)
+{
+ tAST_Variable *var;
+ tAST_BlockState *bs;
+
+ for( bs = Block; bs; bs = bs->Parent )
+ {
+ for( var = bs->FirstVar; var; var = var->Next )
+ {
+ if( strcmp(var->Name, Name) == 0 ) {
+ Object_Reference(var->Object);
+ return var->Object;
+ }
+ }
+ }
+
+
+ AST_RuntimeError(NULL, "Variable '%s' used undefined", Name);
+
+ return ERRPTR;
+}
+
+/**
+ * \brief Destorys a variable
+ */
+void Variable_Destroy(tAST_Variable *Variable)
+{
+// printf("Variable_Destroy: (%p'%s')\n", Variable, Variable->Name);
+ Object_Dereference(Variable->Object);
+ free(Variable);
+}
+
+void AST_RuntimeError(tAST_Node *Node, const char *Format, ...)
+{
+ va_list args;
+
+ fprintf(stderr, "ERROR: ");
+ va_start(args, Format);
+ vfprintf(stderr, Format, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+
+ if(Node)
+ {
+ fprintf(stderr, " at %s:%i\n", Node->File, Node->Line);
+ }
+}
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au