/*
+ * SpiderScript Library
+ *
+ * AST Execution
*/
#include <stdlib.h>
#include <stdio.h>
+#include <stdarg.h>
#include <string.h>
#include "ast.h"
+#define TRACE_VAR_LOOKUPS 0
+#define TRACE_NODE_RETURNS 0
+
+// === IMPORTS ===
+extern tSpiderFunction *gpExports_First;
+
// === PROTOTYPES ===
+// - Values
void Object_Dereference(tSpiderValue *Object);
void Object_Reference(tSpiderValue *Object);
tSpiderValue *SpiderScript_CreateInteger(uint64_t 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);
-
+// - Node Execution
tSpiderValue *AST_ExecuteNode(tAST_BlockState *Block, tAST_Node *Node);
-
-tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name);
-void Variable_SetValue(tAST_BlockState *Block, const char *Name, tSpiderValue *Value);
-tSpiderValue *Variable_GetValue(tAST_BlockState *Block, const char *Name);
+tSpiderValue *AST_ExecuteNode_BinOp(tAST_BlockState *Block, tAST_Node *Node, int Operation, tSpiderValue *Left, tSpiderValue *Right);
+tSpiderValue *AST_ExecuteNode_UniOp(tAST_BlockState *Block, tAST_Node *Node, int Operation, tSpiderValue *Value);
+// - Variables
+tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name, tSpiderValue *Value);
+ int Variable_SetValue(tAST_BlockState *Block, tAST_Node *VarNode, tSpiderValue *Value);
+tSpiderValue *Variable_GetValue(tAST_BlockState *Block, tAST_Node *VarNode);
void Variable_Destroy(tAST_Variable *Variable);
+// - Errors
+void AST_RuntimeMessage(tAST_Node *Node, const char *Type, const char *Format, ...);
+void AST_RuntimeError(tAST_Node *Node, const char *Format, ...);
+
+// === GLOBALS ===
+ int giNextBlockIdent = 1;
// === CODE ===
/**
void Object_Dereference(tSpiderValue *Object)
{
if(!Object) return ;
+ if(Object == ERRPTR) return ;
Object->ReferenceCount --;
+// printf("%p Dereferenced (%i)\n", Object, Object->ReferenceCount);
if( Object->ReferenceCount == 0 ) {
switch( (enum eSpiderScript_DataTypes) Object->Type )
{
{
if(!Object) return ;
Object->ReferenceCount ++;
+// printf("%p Referenced (%i)\n", Object, Object->ReferenceCount);
+}
+
+/**
+ * \brief Allocate and initialise a SpiderScript object
+ */
+tSpiderObject *SpiderScript_AllocateObject(tSpiderObjectDef *Class, int ExtraBytes)
+{
+ int size = sizeof(tSpiderObject) + Class->NAttributes * sizeof(tSpiderValue*) + ExtraBytes;
+ tSpiderObject *ret = malloc(size);
+
+ ret->Type = Class;
+ ret->ReferenceCount = 1;
+ ret->OpaqueData = &ret->Attributes[ Class->NAttributes ];
+ memset( ret->Attributes, 0, Class->NAttributes * sizeof(tSpiderValue*) );
+
+ return ret;
}
/**
ret->Type = SS_DATATYPE_STRING;
ret->ReferenceCount = 1;
ret->String.Length = Length;
- memcpy(ret->String.Data, Data, Length);
+ if( Data )
+ memcpy(ret->String.Data, Data, Length);
+ else
+ memset(ret->String.Data, 0, Length);
ret->String.Data[Length] = '\0';
return ret;
}
/**
* \brief Concatenate two strings
*/
-tSpiderValue *Object_StringConcat(tSpiderValue *Str1, tSpiderValue *Str2)
+tSpiderValue *Object_StringConcat(const tSpiderValue *Str1, const tSpiderValue *Str2)
{
int newLen = 0;
tSpiderValue *ret;
tSpiderValue *SpiderScript_CastValueTo(int Type, tSpiderValue *Source)
{
tSpiderValue *ret = ERRPTR;
+ int len = 0;
+
+ if( !Source )
+ {
+ switch(Type)
+ {
+ case SS_DATATYPE_INTEGER: return SpiderScript_CreateInteger(0);
+ case SS_DATATYPE_REAL: return SpiderScript_CreateReal(0);
+ case SS_DATATYPE_STRING: return SpiderScript_CreateString(4, "null");
+ }
+ return NULL;
+ }
+
// Check if anything needs to be done
if( Source->Type == Type ) {
Object_Reference(Source);
return Source;
}
+ // Debug
+ #if 0
+ {
+ printf("Casting %i ", Source->Type);
+ switch(Source->Type)
+ {
+ case SS_DATATYPE_INTEGER: printf("0x%lx", Source->Integer); break;
+ case SS_DATATYPE_STRING: printf("\"%s\"", Source->String.Data); break;
+ case SS_DATATYPE_REAL: printf("%f", Source->Real); break;
+ default: break;
+ }
+ printf(" to %i\n", Type);
+ }
+ #endif
+
+ // Object casts
+ #if 0
+ if( Source->Type == SS_DATATYPE_OBJECT )
+ {
+ const char *name = NULL;
+ switch(Type)
+ {
+ case SS_DATATYPE_INTEGER: name = "cast Integer"; break;
+ case SS_DATATYPE_REAL: name = "cast Real"; break;
+ case SS_DATATYPE_STRING: name = "cast String"; break;
+ case SS_DATATYPE_ARRAY: name = "cast Array"; break;
+ default:
+ AST_RuntimeError(NULL, "Invalid cast to %i from Object", Type);
+ return ERRPTR;
+ }
+ if( fcnname )
+ {
+ ret = Object_ExecuteMethod(Left->Object, fcnname, Right);
+ if( ret != ERRPTR )
+ return ret;
+ // Fall through and try casting (which will usually fail)
+ }
+ }
+ #endif
+
switch( (enum eSpiderScript_DataTypes)Type )
{
case SS_DATATYPE_UNDEF:
- case SS_DATATYPE_NULL:
case SS_DATATYPE_ARRAY:
case SS_DATATYPE_OPAQUE:
- fprintf(stderr, "SpiderScript_CastValueTo - Invalid cast to %i\n", Type);
+ AST_RuntimeError(NULL, "Invalid cast to %i", Type);
+ return ERRPTR;
+ case SS_DATATYPE_OBJECT:
+ // TODO:
+ AST_RuntimeError(NULL, "Invalid cast to %i", Type);
return ERRPTR;
case SS_DATATYPE_INTEGER:
case SS_DATATYPE_STRING: ret->Integer = atoi(Source->String.Data); break;
case SS_DATATYPE_REAL: ret->Integer = Source->Real; break;
default:
- fprintf(stderr, "SpiderScript_CastValueTo - 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_REAL:
+ ret = malloc(sizeof(tSpiderValue));
+ ret->Type = SS_DATATYPE_REAL;
+ ret->ReferenceCount = 1;
+ switch(Source->Type)
+ {
+ case SS_DATATYPE_STRING: ret->Real = atof(Source->String.Data); break;
+ case SS_DATATYPE_INTEGER: ret->Real = Source->Integer; break;
+ default:
+ AST_RuntimeError(NULL, "Invalid cast from %i to Real", 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: len = snprintf(NULL, 0, "%g", 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, "%g", Source->Real); break;
+ default:
+ AST_RuntimeError(NULL, "Invalid cast from %i to String", Source->Type);
free(ret);
ret = ERRPTR;
break;
}
break;
+
default:
- fprintf(stderr, "BUG REPORT: Unimplemented cast target\n");
+ AST_RuntimeError(NULL, "BUG - BUG REPORT: Unimplemented cast target %i", Type);
+ ret = ERRPTR;
break;
}
switch( (enum eSpiderScript_DataTypes)Value->Type )
{
case SS_DATATYPE_UNDEF:
- case SS_DATATYPE_NULL:
return 0;
case SS_DATATYPE_INTEGER:
case SS_DATATYPE_ARRAY:
return Value->Array.Length > 0;
default:
- fprintf(stderr, "Spiderscript internal error: Unknown type %i in SpiderScript_IsValueTrue\n", Value->Type);
+ AST_RuntimeError(NULL, "Unknown type %i in SpiderScript_IsValueTrue", Value->Type);
return 0;
}
return 0;
}
+/**
+ * \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
switch( (enum eSpiderScript_DataTypes)Value->Type )
{
case SS_DATATYPE_UNDEF: return strdup("undefined");
- case SS_DATATYPE_NULL: return strdup("null type");
case SS_DATATYPE_INTEGER:
ret = malloc( sizeof(Value->Integer)*2 + 3 );
return strdup("Array");
default:
- fprintf(stderr, "Spiderscript internal error: Unknown type %i in Object_Dump\n", Value->Type);
+ AST_RuntimeError(NULL, "Unknown type %i in Object_Dump", Value->Type);
return NULL;
}
}
+/**
+ * \brief Execute a script function
+ * \param Script Script context to execute in
+ * \param Namespace Namespace to search for the function
+ * \param Function Function name to execute
+ * \param NArguments Number of arguments to pass
+ * \param Arguments Arguments passed
+ */
+tSpiderValue *SpiderScript_ExecuteFunction(tSpiderScript *Script,
+ tSpiderNamespace *Namespace, const char *Function,
+ int NArguments, tSpiderValue **Arguments)
+{
+ int bFound = 0; // Used to keep nesting levels down
+ tSpiderValue *ret = ERRPTR;
+ tSpiderFunction *fcn;
+
+ // First: Find the function in the script
+ {
+ tAST_Function *astFcn;
+ for( astFcn = Script->Script->Functions; astFcn; astFcn = astFcn->Next )
+ {
+ if( strcmp(astFcn->Name, Function) == 0 )
+ break;
+ }
+ // Execute!
+ if(astFcn)
+ {
+ tAST_BlockState bs;
+ tAST_Node *arg;
+ int i = 0;
+
+ // Build a block State
+ bs.FirstVar = NULL;
+ bs.RetVal = NULL;
+ bs.Parent = NULL;
+ bs.BaseNamespace = &Script->Variant->RootNamespace;
+ bs.CurNamespace = NULL;
+ bs.Script = Script;
+ bs.Ident = giNextBlockIdent ++;
+
+ // Parse arguments
+ for( arg = astFcn->Arguments; arg; arg = arg->NextSibling, i++ )
+ {
+ if( i >= NArguments ) break; // TODO: Return gracefully
+ // TODO: Type checks
+ Variable_Define(&bs,
+ arg->DefVar.DataType, arg->DefVar.Name,
+ Arguments[i]);
+ }
+
+ // Execute function
+ ret = AST_ExecuteNode(&bs, astFcn->Code);
+ if(ret != ERRPTR)
+ {
+ Object_Dereference(ret); // Dereference output of last block statement
+ ret = bs.RetVal; // Set to return value of block
+ }
+ bFound = 1;
+
+ while(bs.FirstVar)
+ {
+ tAST_Variable *nextVar = bs.FirstVar->Next;
+ Variable_Destroy( bs.FirstVar );
+ bs.FirstVar = nextVar;
+ }
+ }
+ }
+
+ // Didn't find it in script?
+ if(!bFound)
+ {
+ fcn = NULL; // Just to allow the below code to be neat
+
+ // Second: Scan current namespace
+ if( !fcn && Namespace )
+ {
+ for( fcn = Namespace->Functions; fcn; fcn = fcn->Next )
+ {
+ if( strcmp( fcn->Name, Function ) == 0 )
+ break;
+ }
+ }
+
+ // Third: Search the variant's global exports
+ if( !fcn )
+ {
+ for( fcn = Script->Variant->Functions; fcn; fcn = fcn->Next )
+ {
+ if( strcmp( fcn->Name, Function ) == 0 )
+ break;
+ }
+ }
+
+ // Fourth: Search language exports
+ if( !fcn )
+ {
+ for( fcn = gpExports_First; fcn; fcn = fcn->Next )
+ {
+ if( strcmp( fcn->Name, Function ) == 0 )
+ break;
+ }
+ }
+
+ // Execute!
+ if(fcn)
+ {
+ // TODO: Type Checking
+ ret = fcn->Handler( Script, NArguments, Arguments );
+ bFound = 1;
+ }
+ }
+
+ // Not found?
+ if(!bFound)
+ {
+ fprintf(stderr, "Undefined reference to function '%s' (ns='%s')\n",
+ Function, Namespace->Name);
+ return ERRPTR;
+ }
+
+ return ret;
+}
+
+/**
+ * \brief Execute an object method function
+ * \param Script Script context to execute in
+ * \param Object Object in which to find the method
+ * \param MethodName Name of method to call
+ * \param NArguments Number of arguments to pass
+ * \param Arguments Arguments passed
+ */
+tSpiderValue *SpiderScript_ExecuteMethod(tSpiderScript *Script,
+ tSpiderObject *Object, const char *MethodName,
+ int NArguments, tSpiderValue **Arguments)
+{
+ tSpiderFunction *fcn;
+ tSpiderValue this;
+ tSpiderValue *newargs[NArguments+1];
+ int i;
+
+ // TODO: Support program defined objects
+
+ // Search for the function
+ for( fcn = Object->Type->Methods; fcn; fcn = fcn->Next )
+ {
+ if( strcmp(fcn->Name, MethodName) == 0 )
+ break;
+ }
+ // Error
+ if( !fcn )
+ {
+ AST_RuntimeError(NULL, "Class '%s' does not have a method '%s'",
+ Object->Type->Name, MethodName);
+ return ERRPTR;
+ }
+
+ // Create the "this" argument
+ this.Type = SS_DATATYPE_OBJECT;
+ this.ReferenceCount = 1;
+ this.Object = Object;
+ newargs[0] = &this;
+ memcpy(&newargs[1], Arguments, NArguments*sizeof(tSpiderValue*));
+
+ // Check the type of the arguments
+ for( i = 0; fcn->ArgTypes[i]; i ++ )
+ {
+ if( i >= NArguments ) {
+ for( ; fcn->ArgTypes[i]; i ++ ) ;
+ AST_RuntimeError(NULL, "Argument count mismatch (%i passed, %i expected)",
+ NArguments, i);
+ return ERRPTR;
+ }
+ if( Arguments[i] && Arguments[i]->Type != fcn->ArgTypes[i] )
+ {
+ AST_RuntimeError(NULL, "Argument type mismatch (%i, expected %i)",
+ Arguments[i]->Type, fcn->ArgTypes[i]);
+ return ERRPTR;
+ }
+ }
+
+ // Call handler
+ return fcn->Handler(Script, NArguments+1, newargs);
+}
+
+/**
+ * \brief Execute a script function
+ * \param Script Script context to execute in
+ * \param Function Function name to execute
+ * \param NArguments Number of arguments to pass
+ * \param Arguments Arguments passed
+ */
+tSpiderValue *SpiderScript_CreateObject(tSpiderScript *Script,
+ tSpiderNamespace *Namespace, const char *ClassName,
+ int NArguments, tSpiderValue **Arguments)
+{
+ int bFound = 0; // Used to keep nesting levels down
+ tSpiderValue *ret = ERRPTR;
+ tSpiderObjectDef *class;
+
+ // First: Find the function in the script
+ // TODO: Implement script-defined classes
+ #if 0
+ {
+ tAST_Function *astClass;
+ for( astClass = Script->Script->Classes; astClass; astClass = astClass->Next )
+ {
+ if( strcmp(astClass->Name, ClassName) == 0 )
+ break;
+ }
+ // Execute!
+ if(astClass)
+ {
+ tAST_BlockState bs;
+ tAST_Node *arg;
+ int i = 0;
+
+ // Build a block State
+ bs.FirstVar = NULL;
+ bs.RetVal = NULL;
+ bs.Parent = NULL;
+ bs.BaseNamespace = &Script->Variant->RootNamespace;
+ bs.CurNamespace = NULL;
+ bs.Script = Script;
+ bs.Ident = giNextBlockIdent ++;
+
+ for( arg = astFcn->Arguments; arg; arg = arg->NextSibling, i++ )
+ {
+ if( i >= NArguments ) break; // TODO: Return gracefully
+ // TODO: Type checks
+ Variable_Define(&bs,
+ arg->DefVar.DataType, arg->DefVar.Name,
+ Arguments[i]);
+ }
+
+ // Execute function
+ ret = AST_ExecuteNode(&bs, astFcn->Code);
+ if( ret != ERRPTR )
+ {
+ Object_Dereference(ret); // Dereference output of last block statement
+ ret = bs.RetVal; // Set to return value of block
+ }
+ bFound = 1;
+
+ while(bs.FirstVar)
+ {
+ tAST_Variable *nextVar = bs.FirstVar->Next;
+ Variable_Destroy( bs.FirstVar );
+ bs.FirstVar = nextVar;
+ }
+ }
+ }
+ #endif
+
+ // Didn't find it in script?
+ if(!bFound)
+ {
+ class = NULL; // Just to allow the below code to be neat
+
+ //if( !Namespace )
+ // Namespace = &Script->Variant->RootNamespace;
+
+ // Second: Scan current namespace
+ if( !class && Namespace )
+ {
+ for( class = Namespace->Classes; class; class = class->Next )
+ {
+ if( strcmp( class->Name, ClassName ) == 0 )
+ break;
+ }
+ }
+
+ #if 0
+ // Third: Search the variant's global exports
+ if( !class )
+ {
+ for( class = Script->Variant->Classes; class; class = fcn->Next )
+ {
+ if( strcmp( class->Name, Function ) == 0 )
+ break;
+ }
+ }
+ #endif
+
+ #if 0
+ // Fourth: Search language exports
+ if( !class )
+ {
+ for( class = gpExports_First; class; class = fcn->Next )
+ {
+ if( strcmp( class->Name, ClassName ) == 0 )
+ break;
+ }
+ }
+ #endif
+
+ // Execute!
+ if(class)
+ {
+ tSpiderObject *obj;
+ // TODO: Type Checking
+
+ // Call constructor
+ obj = class->Constructor( NArguments, Arguments );
+ if( obj == NULL || obj == ERRPTR )
+ return (void *)obj;
+
+ // Creatue return object
+ ret = malloc( sizeof(tSpiderValue) );
+ ret->Type = SS_DATATYPE_OBJECT;
+ ret->ReferenceCount = 1;
+ ret->Object = obj;
+ bFound = 1;
+ }
+ }
+
+ // Not found?
+ if(!bFound)
+ {
+ fprintf(stderr, "Undefined reference to class '%s'\n", ClassName);
+ return ERRPTR;
+ }
+
+ return ret;
+}
+
+
/**
* \brief Execute an AST node and return its value
+ * \param Block Execution context
+ * \param Node Node to execute
*/
tSpiderValue *AST_ExecuteNode(tAST_BlockState *Block, tAST_Node *Node)
{
tSpiderValue *ret = NULL, *tmpobj;
tSpiderValue *op1, *op2; // Binary operations
int cmp; // Used in comparisons
+ int i;
switch(Node->Type)
{
// No Operation
- case NODETYPE_NOP: ret = NULL; break;
+ case NODETYPE_NOP:
+ ret = NULL;
+ break;
// Code block
case NODETYPE_BLOCK:
{
tAST_BlockState blockInfo;
- blockInfo.FirstVar = NULL;
- blockInfo.RetVal = NULL;
blockInfo.Parent = Block;
blockInfo.Script = Block->Script;
+ blockInfo.FirstVar = NULL;
+ blockInfo.RetVal = NULL;
+ blockInfo.BaseNamespace = Block->BaseNamespace;
+ blockInfo.CurNamespace = NULL;
+ blockInfo.BreakTarget = NULL;
+ blockInfo.Ident = giNextBlockIdent ++;
ret = NULL;
- for(node = Node->Block.FirstChild; node && !blockInfo.RetVal; node = node->NextSibling )
+ // Loop over all nodes, or until the return value is set
+ for(node = Node->Block.FirstChild;
+ node && !blockInfo.RetVal && !blockInfo.BreakTarget;
+ node = node->NextSibling )
{
- tmpobj = AST_ExecuteNode(&blockInfo, node);
- if(tmpobj == ERRPTR) { // Error check
- ret = ERRPTR;
- break ;
- }
- if(tmpobj) Object_Dereference(tmpobj); // Free unused value
+ ret = AST_ExecuteNode(&blockInfo, node);
+ if(ret == ERRPTR) break; // Error check
+ if(ret != NULL) Object_Dereference(ret); // Free unused value
}
// Clean up variables
while(blockInfo.FirstVar)
Variable_Destroy( blockInfo.FirstVar );
blockInfo.FirstVar = nextVar;
}
+ // Clear ret if not an error
+ if(ret != ERRPTR) ret = NULL;
+ // Set parent's return value if needed
if( blockInfo.RetVal )
Block->RetVal = blockInfo.RetVal;
+ if( blockInfo.BreakTarget ) {
+ Block->BreakTarget = blockInfo.BreakTarget;
+ Block->BreakType = blockInfo.BreakType;
+ }
+
+ // TODO: Unset break if break type deontes a block break
}
break;
// Assignment
case NODETYPE_ASSIGN:
+ // TODO: Support assigning to object attributes
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)
- Variable_SetValue( Block, Node->Assign.Dest->Variable.Name, ret );
+ if(ret == ERRPTR) return ERRPTR;
+
+ // Perform assignment operation
+ if( Node->Assign.Operation != NODETYPE_NOP )
+ {
+ tSpiderValue *varVal, *value;
+
+ varVal = Variable_GetValue(Block, Node->Assign.Dest);
+ if(varVal == ERRPTR) return ERRPTR;
+ #if 0
+ #else
+ if(varVal && varVal->ReferenceCount == 2) {
+ Object_Dereference(varVal);
+// printf("pre: (%s) varVal->ReferenceCount = %i\n",
+// Node->Assign.Dest->Variable.Name,
+// varVal->ReferenceCount);
+ }
+ #endif
+ value = AST_ExecuteNode_BinOp(Block, Node, Node->Assign.Operation, varVal, ret);
+ if(value == ERRPTR) return ERRPTR;
+
+ if(ret) Object_Dereference(ret);
+ #if 0
+ if(varVal) Object_Dereference(varVal);
+ #else
+ if(varVal && varVal->ReferenceCount == 1) {
+ Object_Reference(varVal);
+// printf("post: varVal->ReferenceCount = %i\n", varVal->ReferenceCount);
+ break; // If varVal was non-null, it has been updated by _BinOp
+ }
+ #endif
+ // Else, it was NULL, so has to be assigned
+ ret = value;
+ }
+
+ // Set the variable value
+ if( Variable_SetValue( Block, Node->Assign.Dest, ret ) ) {
+ Object_Dereference( ret );
+ return ERRPTR;
+ }
+ break;
+
+ // Post increment/decrement
+ case NODETYPE_POSTINC:
+ case NODETYPE_POSTDEC:
+ {
+ tSpiderValue *varVal, *value;
+ static tSpiderValue one = {
+ .Type = SS_DATATYPE_INTEGER,
+ .ReferenceCount = 1,
+ {.Integer = 1}
+ };
+
+ // TODO: Support assigning to object attributes
+ if( Node->UniOp.Value->Type != NODETYPE_VARIABLE ) {
+ AST_RuntimeError(Node, "LVALUE of assignment is not a variable");
+ return ERRPTR;
+ }
+
+ // Get values (current variable contents and a static one)
+ varVal = Variable_GetValue(Block, Node->UniOp.Value);
+
+ if( Node->Type == NODETYPE_POSTDEC )
+ value = AST_ExecuteNode_BinOp(Block, Node, NODETYPE_SUBTRACT, varVal, &one);
+ else
+ value = AST_ExecuteNode_BinOp(Block, Node, NODETYPE_ADD, varVal, &one);
+ if( value == ERRPTR )
+ return ERRPTR;
+
+ ret = varVal;
+
+ if( Variable_SetValue( Block, Node->UniOp.Value, value ) ) {
+ Object_Dereference( ret );
+ return ERRPTR;
+ }
+ Object_Dereference( value );
+ }
break;
// Function Call
+ case NODETYPE_METHODCALL:
case NODETYPE_FUNCTIONCALL:
+ case NODETYPE_CREATEOBJECT:
+ // Logical block (used to allocate `params`)
{
- int nParams = 0;
- for(node = Node->FunctionCall.FirstArg; node; node = node->NextSibling) {
- nParams ++;
+ tSpiderNamespace *ns = Block->CurNamespace;
+ tSpiderValue *params[Node->FunctionCall.NumArgs];
+ 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 ++;
+ }
+
+ if( !ns ) ns = Block->BaseNamespace;
+
+ // Call the function
+ if( Node->Type == NODETYPE_CREATEOBJECT )
+ {
+ ret = SpiderScript_CreateObject(Block->Script,
+ ns,
+ Node->FunctionCall.Name,
+ Node->FunctionCall.NumArgs, params
+ );
}
- // Logical block (used to allocate `params`)
+ else if( Node->Type == NODETYPE_METHODCALL )
{
- 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 ++;
+ tSpiderValue *obj = AST_ExecuteNode(Block, Node->FunctionCall.Object);
+ if( !obj || obj == ERRPTR || obj->Type != SS_DATATYPE_OBJECT ) {
+ AST_RuntimeError(Node->FunctionCall.Object,
+ "Type Mismatch - Required SS_DATATYPE_OBJECT for method call");
+ while(i--) Object_Dereference(params[i]);
+ ret = ERRPTR;
+ break;
}
-
- // 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
+ ret = SpiderScript_ExecuteMethod(Block->Script,
+ obj->Object, Node->FunctionCall.Name,
+ Node->FunctionCall.NumArgs, params
+ );
+ Object_Dereference(obj);
}
+ else
+ {
+ ret = SpiderScript_ExecuteFunction(Block->Script,
+ ns, Node->FunctionCall.Name,
+ Node->FunctionCall.NumArgs, params
+ );
+ }
+
+
+ // Dereference parameters
+ while(i--) Object_Dereference(params[i]);
+
+ // falls out
}
break;
// Conditional
case NODETYPE_IF:
ret = AST_ExecuteNode(Block, Node->If.Condition);
+ if( ret == ERRPTR ) break;
if( SpiderScript_IsValueTrue(ret) ) {
- AST_ExecuteNode(Block, Node->If.True);
+ tmpobj = AST_ExecuteNode(Block, Node->If.True);
}
else {
- AST_ExecuteNode(Block, Node->If.False);
+ tmpobj = AST_ExecuteNode(Block, Node->If.False);
}
Object_Dereference(ret);
+ if( tmpobj == ERRPTR ) return ERRPTR;
+ Object_Dereference(tmpobj);
+ ret = NULL;
break;
// Loop
case NODETYPE_LOOP:
+ // Initialise
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.Condition);
- } while( SpiderScript_IsValueTrue(ret) );
- }
- else {
+ if(ret == ERRPTR) break;
+
+ // Check initial condition
+ if( !Node->For.bCheckAfter )
+ {
Object_Dereference(ret);
+
ret = AST_ExecuteNode(Block, Node->For.Condition);
- while( SpiderScript_IsValueTrue(ret) ) {
- Object_Dereference(ret);
- ret = AST_ExecuteNode(Block, Node->For.Code);
+ if(ret == ERRPTR) return ERRPTR;
+ if(!SpiderScript_IsValueTrue(ret)) {
Object_Dereference(ret);
- ret = AST_ExecuteNode(Block, Node->For.Condition);
+ ret = NULL;
+ break;
}
+ }
+
+ // Perform loop
+ for( ;; )
+ {
+ Object_Dereference(ret);
+
+ // Code
+ ret = AST_ExecuteNode(Block, Node->For.Code);
+ if(ret == ERRPTR) return ERRPTR;
Object_Dereference(ret);
+
+ if(Block->BreakTarget)
+ {
+ if( Block->BreakTarget[0] == '\0' || strcmp(Block->BreakTarget, Node->For.Tag) == 0 )
+ {
+ // Ours
+ free((void*)Block->BreakTarget); Block->BreakTarget = NULL;
+ if( Block->BreakType == NODETYPE_CONTINUE ) {
+ // Continue, just keep going
+ }
+ else
+ break;
+ }
+ else
+ break; // Break out of this loop
+ }
+
+ // Increment
+ ret = AST_ExecuteNode(Block, Node->For.Increment);
+ if(ret == ERRPTR) return ERRPTR;
+ Object_Dereference(ret);
+
+ // Check condition
+ ret = AST_ExecuteNode(Block, Node->For.Condition);
+ if(ret == ERRPTR) return ERRPTR;
+ if(!SpiderScript_IsValueTrue(ret)) break;
}
+ Object_Dereference(ret);
+ ret = NULL;
break;
// Return
case NODETYPE_RETURN:
ret = AST_ExecuteNode(Block, Node->UniOp.Value);
+ if(ret == ERRPTR) break;
Block->RetVal = ret; // Return value set
+ ret = NULL; // the `return` statement does not return a value
+ break;
+
+ case NODETYPE_BREAK:
+ case NODETYPE_CONTINUE:
+ Block->BreakTarget = strdup(Node->Variable.Name);
+ Block->BreakType = Node->Type;
break;
// Define a variable
case NODETYPE_DEFVAR:
+ if( Node->DefVar.InitialValue ) {
+ tmpobj = AST_ExecuteNode(Block, Node->DefVar.InitialValue);
+ if(tmpobj == ERRPTR) return ERRPTR;
+ }
+ else {
+ tmpobj = NULL;
+ }
+ // TODO: Handle arrays
ret = NULL;
- if( Variable_Define(Block, Node->DefVar.DataType, Node->DefVar.Name) == ERRPTR )
+ if( Variable_Define(Block, Node->DefVar.DataType, Node->DefVar.Name, tmpobj) == ERRPTR )
ret = ERRPTR;
+ Object_Dereference(tmpobj);
+ break;
+
+ // Scope
+ case NODETYPE_SCOPE:
+ {
+ tSpiderNamespace *ns;
+
+ // Set current namespace if unset
+ if( !Block->CurNamespace )
+ Block->CurNamespace = Block->BaseNamespace;
+
+ // Empty string means use the root namespace
+ if( Node->Scope.Name[0] == '\0' )
+ {
+ ns = &Block->Script->Variant->RootNamespace;
+ }
+ else
+ {
+ // Otherwise scan the current namespace for the element
+ for( ns = Block->CurNamespace->FirstChild; ns; ns = ns->Next )
+ {
+ if( strcmp(ns->Name, Node->Scope.Name) == 0 )
+ break;
+ }
+ }
+ if(!ns) {
+ AST_RuntimeError(Node, "Unknown namespace '%s'", Node->Scope.Name);
+ ret = ERRPTR;
+ break;
+ }
+ Block->CurNamespace = ns;
+
+ ret = AST_ExecuteNode(Block, Node->Scope.Element);
+ }
break;
// Variable
case NODETYPE_VARIABLE:
- ret = Variable_GetValue( Block, Node->Variable.Name );
+ ret = Variable_GetValue( Block, Node );
+ break;
+
+ // Element of an Object
+ case NODETYPE_ELEMENT:
+ tmpobj = AST_ExecuteNode( Block, Node->Scope.Element );
+ if(tmpobj == ERRPTR) return ERRPTR;
+ if( !tmpobj || tmpobj->Type != SS_DATATYPE_OBJECT )
+ {
+ AST_RuntimeError(Node->Scope.Element, "Unable to dereference a non-object");
+ ret = ERRPTR;
+ break ;
+ }
+
+ for( i = 0; i < tmpobj->Object->Type->NAttributes; i ++ )
+ {
+ if( strcmp(Node->Scope.Name, tmpobj->Object->Type->AttributeDefs[i].Name) == 0 )
+ {
+ ret = tmpobj->Object->Attributes[i];
+ Object_Reference(ret);
+ break;
+ }
+ }
+ if( i == tmpobj->Object->Type->NAttributes )
+ {
+ AST_RuntimeError(Node->Scope.Element, "Unknown attribute '%s' of class '%s'",
+ Node->Scope.Name, tmpobj->Object->Type->Name);
+ ret = ERRPTR;
+ }
break;
// Cast a value to another
case NODETYPE_CAST:
- ret = SpiderScript_CastValueTo(
- Node->Cast.DataType,
- AST_ExecuteNode(Block, Node->Cast.Value)
- );
+ {
+ tmpobj = AST_ExecuteNode(Block, Node->Cast.Value);
+ if(tmpobj == ERRPTR) return ERRPTR;
+ ret = SpiderScript_CastValueTo( Node->Cast.DataType, tmpobj );
+ Object_Dereference(tmpobj);
+ }
break;
// Index into an array
case NODETYPE_INDEX:
- fprintf(stderr, "TODO: Array indexing\n");
- ret = ERRPTR;
+ op1 = AST_ExecuteNode(Block, Node->BinOp.Left); // Array
+ if(op1 == ERRPTR) return ERRPTR;
+ op2 = AST_ExecuteNode(Block, Node->BinOp.Right); // Offset
+ if(op2 == ERRPTR) {
+ Object_Dereference(op1);
+ return ERRPTR;
+ }
+
+ if( !op1 || op1->Type != SS_DATATYPE_ARRAY )
+ {
+ // TODO: Implement "operator []" on objects
+ AST_RuntimeError(Node, "Indexing non-array");
+ ret = ERRPTR;
+ break;
+ }
+
+ if( (!op2 || op2->Type != SS_DATATYPE_INTEGER) && !Block->Script->Variant->bImplicitCasts ) {
+ AST_RuntimeError(Node, "Array index is not an integer");
+ ret = ERRPTR;
+ break;
+ }
+
+ if( !op2 || op2->Type != SS_DATATYPE_INTEGER )
+ {
+ tmpobj = SpiderScript_CastValueTo(SS_DATATYPE_INTEGER, op2);
+ Object_Dereference(op2);
+ op2 = tmpobj;
+ }
+
+ if( op2->Integer >= op1->Array.Length ) {
+ AST_RuntimeError(Node, "Array index out of bounds %i >= %i",
+ op2->Integer, op1->Array.Length);
+ ret = ERRPTR;
+ break;
+ }
+
+ ret = op1->Array.Items[ op2->Integer ];
+ Object_Reference(ret);
+
+ Object_Dereference(op1);
+ Object_Dereference(op2);
break;
// TODO: Implement runtime constants
case NODETYPE_CONSTANT:
- fprintf(stderr, "TODO: Runtime Constants\n");
+ // TODO: Scan namespace for constant name
+ AST_RuntimeError(Node, "TODO - Runtime Constants");
ret = ERRPTR;
break;
+
// Constant Values
- 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;
+ case NODETYPE_STRING:
+ case NODETYPE_INTEGER:
+ case NODETYPE_REAL:
+ ret = &Node->Constant;
+ Object_Reference(ret);
+ break;
// --- Operations ---
// Boolean Operations
+ case NODETYPE_LOGICALNOT: // Logical NOT (!)
+ op1 = AST_ExecuteNode(Block, Node->UniOp.Value);
+ if(op1 == ERRPTR) return ERRPTR;
+ ret = SpiderScript_CreateInteger( !SpiderScript_IsValueTrue(op1) );
+ Object_Dereference(op1);
+ break;
case NODETYPE_LOGICALAND: // Logical AND (&&)
case NODETYPE_LOGICALOR: // Logical OR (||)
case NODETYPE_LOGICALXOR: // Logical XOR (^^)
case NODETYPE_EQUALS:
case NODETYPE_LESSTHAN:
case NODETYPE_GREATERTHAN:
+ case NODETYPE_LESSTHANEQUAL:
+ case NODETYPE_GREATERTHANEQUAL:
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;
+ ret = ERRPTR;
+ break;
}
- // No conversion done for NULL
- // TODO: Determine if this will ever be needed
- if( op1->Type == SS_DATATYPE_NULL )
- {
- // NULLs always typecheck
- ret = SpiderScript_CreateInteger(op2->Type == SS_DATATYPE_NULL);
+ if( !op1 || !op2 ) {
+ AST_RuntimeError(Node, "NULL Comparison (%p and %p)", op1, op2);
+ if(op1) Object_Dereference(op1);
+ if(op2) Object_Dereference(op2);
+ ret = SpiderScript_CreateInteger( !op1 && !op2 );
break;
}
// Convert types
if( op1->Type != op2->Type ) {
// If dynamically typed, convert op2 to op1's type
- if(Block->Script->Variant->bDyamicTyped)
+ if(Block->Script->Variant->bImplicitCasts)
{
tmpobj = op2;
op2 = SpiderScript_CastValueTo(op1->Type, op2);
}
// If statically typed, this should never happen, but catch it anyway
else {
- fprintf(stderr, "PARSER ERROR: Statically typed implicit cast\n");
+ AST_RuntimeError(Node, "Statically typed implicit cast %i <op> %i",
+ op1->Type, op2->Type);
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;
+ // - Real Number Comparisons
+ case SS_DATATYPE_REAL:
+ cmp = (op1->Real - op2->Real) / op2->Real * 10000; // < 0.1% difference is equality
+ break;
default:
- fprintf(stderr, "SpiderScript internal error: TODO: Comparison of type %i\n", op1->Type);
+ AST_RuntimeError(Node, "TODO - Comparison of type %i", op1->Type);
ret = ERRPTR;
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;
+ case NODETYPE_LESSTHANEQUAL: ret = SpiderScript_CreateInteger(cmp <= 0); break;
+ case NODETYPE_GREATERTHANEQUAL: 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;
}
break;
+ // General Unary Operations
+ case NODETYPE_BWNOT: // Bitwise NOT (~)
+ case NODETYPE_NEGATE: // Negation (-)
+ op1 = AST_ExecuteNode(Block, Node->UniOp.Value);
+ if(op1 == ERRPTR) return ERRPTR;
+ ret = AST_ExecuteNode_UniOp(Block, Node, Node->Type, op1);
+ Object_Dereference(op1);
+ break;
+
// General Binary Operations
case NODETYPE_ADD:
case NODETYPE_SUBTRACT:
return ERRPTR;
}
- // Convert types
- if( op1 && op2 && op1->Type != op2->Type ) {
- // If dynamically typed, convert op2 to op1's type
- if(Block->Script->Variant->bDyamicTyped)
- {
- 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 {
- fprintf(stderr, "PARSER ERROR: Statically typed implicit cast\n");
- ret = ERRPTR;
- break;
- }
+ ret = AST_ExecuteNode_BinOp(Block, Node, 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", Node->Type);
+ // break;
+ }
+_return:
+ // Reset namespace when no longer needed
+ if( Node->Type != NODETYPE_SCOPE )
+ Block->CurNamespace = NULL;
+
+ #if TRACE_NODE_RETURNS
+ if(ret && ret != ERRPTR) {
+ AST_RuntimeError(Node, "Ret type of %p %i is %i", Node, Node->Type, ret->Type);
+ }
+ else {
+ AST_RuntimeError(Node, "Ret type of %p %i is %p", Node, Node->Type, ret);
+ }
+ #endif
+
+ return ret;
+}
+
+tSpiderValue *AST_ExecuteNode_UniOp(tAST_BlockState *Block, tAST_Node *Node, int Operation, tSpiderValue *Value)
+{
+ tSpiderValue *ret;
+ #if 0
+ if( Value->Type == SS_DATATYPE_OBJECT )
+ {
+ const char *fcnname;
+ switch(Operation)
+ {
+ case NODETYPE_NEGATE: fcnname = "-ve"; break;
+ case NODETYPE_BWNOT: fcnname = "~"; break;
+ default: fcnname = NULL; break;
}
- // Do operation
- switch(op1->Type)
+ if( fcnname )
{
- case SS_DATATYPE_NULL: break;
- // String Concatenation
- case SS_DATATYPE_STRING:
- switch(Node->Type)
- {
- case NODETYPE_ADD: // Concatenate
- ret = Object_StringConcat(op1, op2);
- break;
- default:
- fprintf(stderr, "SpiderScript internal error: Exec,BinOP,String unknown op %i\n", Node->Type);
- ret = ERRPTR;
- break;
- }
+ ret = Object_ExecuteMethod(Value->Object, fcnname, );
+ if( ret != ERRPTR )
+ return ret;
+ }
+ }
+ #endif
+ switch(Value->Type)
+ {
+ // Integer Operations
+ case SS_DATATYPE_INTEGER:
+ if( Value->ReferenceCount == 1 )
+ Object_Reference(ret = Value);
+ else
+ ret = SpiderScript_CreateInteger(0);
+ switch(Operation)
+ {
+ case NODETYPE_NEGATE: ret->Integer = -Value->Integer; break;
+ case NODETYPE_BWNOT: ret->Integer = ~Value->Integer; break;
+ default:
+ AST_RuntimeError(Node, "SpiderScript internal error: Exec,UniOP,Integer unknown op %i", Operation);
+ Object_Dereference(ret);
+ ret = ERRPTR;
break;
- // Integer Operations
- case SS_DATATYPE_INTEGER:
- switch(Node->Type)
+ }
+ break;
+ // Real number Operations
+ case SS_DATATYPE_REAL:
+ switch(Operation)
+ {
+ case NODETYPE_NEGATE: ret = SpiderScript_CreateInteger( -Value->Real ); break;
+ default:
+ AST_RuntimeError(Node, "SpiderScript internal error: Exec,UniOP,Real unknown op %i", Operation);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+
+ default:
+ AST_RuntimeError(NULL, "Invalid operation (%i) on type (%i)", Operation, Value->Type);
+ ret = ERRPTR;
+ break;
+ }
+
+ return ret;
+}
+
+tSpiderValue *AST_ExecuteNode_BinOp(tAST_BlockState *Block, tAST_Node *Node, 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)
{
- case NODETYPE_ADD: ret = SpiderScript_CreateInteger( op1->Integer + op2->Integer ); break;
- case NODETYPE_SUBTRACT: ret = SpiderScript_CreateInteger( op1->Integer - op2->Integer ); break;
- case NODETYPE_MULTIPLY: ret = SpiderScript_CreateInteger( op1->Integer * op2->Integer ); break;
- case NODETYPE_DIVIDE: ret = SpiderScript_CreateInteger( op1->Integer / op2->Integer ); break;
- case NODETYPE_MODULO: ret = SpiderScript_CreateInteger( op1->Integer % op2->Integer ); break;
- case NODETYPE_BWAND: ret = SpiderScript_CreateInteger( op1->Integer & op2->Integer ); break;
- case NODETYPE_BWOR: ret = SpiderScript_CreateInteger( op1->Integer | op2->Integer ); break;
- case NODETYPE_BWXOR: ret = SpiderScript_CreateInteger( op1->Integer ^ op2->Integer ); break;
- case NODETYPE_BITSHIFTLEFT: ret = SpiderScript_CreateInteger( op1->Integer << op2->Integer ); break;
- case NODETYPE_BITSHIFTRIGHT:ret = SpiderScript_CreateInteger( op1->Integer >> op2->Integer ); break;
- case NODETYPE_BITROTATELEFT:
- ret = SpiderScript_CreateInteger( (op1->Integer << op2->Integer) | (op1->Integer >> (64-op2->Integer)) );
- break;
- default:
- fprintf(stderr, "SpiderScript internal error: Exec,BinOP,Integer unknown op %i\n", Node->Type);
- ret = ERRPTR;
- break;
+ 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;
}
- break;
-
- // Real Numbers
- case SS_DATATYPE_REAL:
- switch(Node->Type)
+
+ if( fcnname )
{
- default:
- fprintf(stderr, "SpiderScript internal error: Exec,BinOP,Real unknown op %i\n", Node->Type);
- ret = ERRPTR;
- break;
+ ret = Object_ExecuteMethod(Left->Object, fcnname, Right);
+ if( ret != ERRPTR )
+ return ret;
+ // Fall through and try casting (which will usually fail)
}
- break;
+ }
+ #endif
+ // If implicit casts are allowed, convert Right to Left's type
+ if(Block->Script->Variant->bImplicitCasts)
+ {
+ 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(Node, "Implicit cast not allowed (from %i to %i)", 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;
+ // TODO: Support python style 'i = %i' % i ?
+ // Might do it via a function call
+ // Implement it via % with an array, but getting past the cast will be fun
+// case NODETYPE_MODULUS:
+// break;
+ // TODO: Support string repititions
+// case NODETYPE_MULTIPLY:
+// break;
+
default:
- fprintf(stderr, "SpiderScript error: Invalid operation (%i) on type (%i)\n", Node->Type, op1->Type);
+ AST_RuntimeError(Node, "SpiderScript internal error: Exec,BinOP,String unknown op %i", Operation);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+ // Integer Operations
+ case SS_DATATYPE_INTEGER:
+ if( Left->ReferenceCount == 1 )
+ Object_Reference(ret = Left);
+ else
+ ret = SpiderScript_CreateInteger(0);
+ switch(Operation)
+ {
+ case NODETYPE_ADD: ret->Integer = Left->Integer + Right->Integer; break;
+ case NODETYPE_SUBTRACT: ret->Integer = Left->Integer - Right->Integer; break;
+ case NODETYPE_MULTIPLY: ret->Integer = Left->Integer * Right->Integer; break;
+ case NODETYPE_DIVIDE: ret->Integer = Left->Integer / Right->Integer; break;
+ case NODETYPE_MODULO: ret->Integer = Left->Integer % Right->Integer; break;
+ case NODETYPE_BWAND: ret->Integer = Left->Integer & Right->Integer; break;
+ case NODETYPE_BWOR: ret->Integer = Left->Integer | Right->Integer; break;
+ case NODETYPE_BWXOR: ret->Integer = Left->Integer ^ Right->Integer; break;
+ case NODETYPE_BITSHIFTLEFT: ret->Integer = Left->Integer << Right->Integer; break;
+ case NODETYPE_BITSHIFTRIGHT:ret->Integer = Left->Integer >> Right->Integer; break;
+ case NODETYPE_BITROTATELEFT:
+ ret->Integer = (Left->Integer << Right->Integer) | (Left->Integer >> (64-Right->Integer));
+ break;
+ default:
+ AST_RuntimeError(Node, "SpiderScript internal error: Exec,BinOP,Integer unknown op %i", Operation);
+ Object_Dereference(ret);
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:
+ if( Left->ReferenceCount == 1 )
+ Object_Reference(ret = Left);
+ else
+ ret = SpiderScript_CreateReal(0);
+ switch(Operation)
+ {
+ case NODETYPE_ADD: ret->Real = Left->Real + Right->Real; break;
+ case NODETYPE_SUBTRACT: ret->Real = Left->Real - Right->Real; break;
+ case NODETYPE_MULTIPLY: ret->Real = Left->Real * Right->Real; break;
+ case NODETYPE_DIVIDE: ret->Real = Left->Real / Right->Real; break;
+ default:
+ AST_RuntimeError(Node, "SpiderScript internal error: Exec,BinOP,Real unknown op %i", Operation);
+ Object_Dereference(ret);
+ ret = ERRPTR;
+ break;
+ }
+ break;
+
+ default:
+ AST_RuntimeError(Node, "BUG - Invalid operation (%i) on type (%i)", Operation, Left->Type);
+ ret = ERRPTR;
+ break;
}
-_return:
+
+ if(Right && Right != preCastValue) free(Right);
+
return ret;
}
* \param Name Name of the variable
* \return Boolean Failure
*/
-tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name)
+tAST_Variable *Variable_Define(tAST_BlockState *Block, int Type, const char *Name, tSpiderValue *Value)
{
tAST_Variable *var, *prev = NULL;
for( var = Block->FirstVar; var; prev = var, var = var->Next )
{
if( strcmp(var->Name, Name) == 0 ) {
- fprintf(stderr, "ERROR: Redefinition of variable '%s'\n", Name);
+ 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;
+ var->Object = Value;
+ if(Value) Object_Reference(Value);
strcpy(var->Name, Name);
if(prev) prev->Next = var;
return var;
}
-/**
- * \brief Set the value of a variable
- */
-void Variable_SetValue(tAST_BlockState *Block, const char *Name, tSpiderValue *Value)
-{
- tAST_Variable *var;
- tAST_BlockState *bs;
+tAST_Variable *Variable_Lookup(tAST_BlockState *Block, tAST_Node *VarNode, int CreateType)
+{
+ tAST_Variable *var = NULL;
- for( bs = Block; bs; bs = bs->Parent )
+ // Speed hack
+ if( VarNode->BlockState == Block && VarNode->BlockIdent == Block->Ident ) {
+ var = VarNode->ValueCache;
+ #if TRACE_VAR_LOOKUPS
+ AST_RuntimeMessage(VarNode, "debug", "Fast var fetch on '%s' %p (%p:%i)",
+ VarNode->Variable.Name, var,
+ VarNode->BlockState, VarNode->BlockIdent
+ );
+ #endif
+ }
+ else
{
- for( var = bs->FirstVar; var; var = var->Next )
+ tAST_BlockState *bs;
+ for( bs = Block; bs; bs = bs->Parent )
{
- if( strcmp(var->Name, Name) == 0 ) {
- if( !Block->Script->Variant->bDyamicTyped
- && (Value && var->Type != Value->Type) ) {
- fprintf(stderr, "ERROR: Type mismatch assigning to '%s'\n", Name);
- return ;
- }
- Object_Reference(Value);
- Object_Dereference(var->Object);
- var->Object = Value;
- return ;
+ for( var = bs->FirstVar; var; var = var->Next )
+ {
+ if( strcmp(var->Name, VarNode->Variable.Name) == 0 )
+ break;
+ }
+ if(var) break;
+ }
+
+ if( !var )
+ {
+ if( Block->Script->Variant->bDyamicTyped && CreateType != SS_DATATYPE_UNDEF ) {
+ // Define variable
+ var = Variable_Define(Block, CreateType, VarNode->Variable.Name, NULL);
+ }
+ else
+ {
+ AST_RuntimeError(VarNode, "Variable '%s' is undefined", VarNode->Variable.Name);
+ return NULL;
}
}
+
+ #if TRACE_VAR_LOOKUPS
+ AST_RuntimeMessage(VarNode, "debug", "Saved variable lookup of '%s' %p (%p:%i)",
+ VarNode->Variable.Name, var,
+ Block, Block->Ident);
+ #endif
+
+ VarNode->ValueCache = var;
+ VarNode->BlockState = Block;
+ VarNode->BlockIdent = Block->Ident;
}
- if( Block->Script->Variant->bDyamicTyped )
- {
- // Define variable
- var = Variable_Define(Block, Value->Type, Name);
- Object_Reference(Value);
- var->Object = Value;
- }
- else
- {
- fprintf(stderr, "ERROR: Variable '%s' set while undefined\n", Name);
- }
+ return var;
}
/**
- * \brief Get the value of a variable
+ * \brief Set the value of a variable
+ * \return Boolean Failure
*/
-tSpiderValue *Variable_GetValue(tAST_BlockState *Block, const char *Name)
+int Variable_SetValue(tAST_BlockState *Block, tAST_Node *VarNode, tSpiderValue *Value)
{
tAST_Variable *var;
- tAST_BlockState *bs;
- for( bs = Block; bs; bs = bs->Parent )
+ var = Variable_Lookup(Block, VarNode, (Value ? Value->Type : SS_DATATYPE_UNDEF));
+
+ if( !var ) return -1;
+
+ if( !Block->Script->Variant->bDyamicTyped && (Value && var->Type != Value->Type) )
{
- for( var = bs->FirstVar; var; var = var->Next )
- {
- if( strcmp(var->Name, Name) == 0 ) {
- Object_Reference(var->Object);
- return var->Object;
- }
- }
+ AST_RuntimeError(VarNode, "Type mismatch assigning to '%s'",
+ VarNode->Variable.Name);
+ return -2;
}
+
+// printf("Assign %p to '%s'\n", Value, var->Name);
+ Object_Reference(Value);
+ Object_Dereference(var->Object);
+ var->Object = Value;
+ return 0;
+}
+
+/**
+ * \brief Get the value of a variable
+ */
+tSpiderValue *Variable_GetValue(tAST_BlockState *Block, tAST_Node *VarNode)
+{
+ tAST_Variable *var = Variable_Lookup(Block, VarNode, 0);
- fprintf(stderr, "ERROR: Variable '%s' used undefined\n", Name);
+ if( !var ) return ERRPTR;
- return ERRPTR;
+ Object_Reference(var->Object);
+ return var->Object;
}
/**
*/
void Variable_Destroy(tAST_Variable *Variable)
{
+// printf("Variable_Destroy: (%p'%s')\n", Variable, Variable->Name);
Object_Dereference(Variable->Object);
free(Variable);
}
+
+void AST_RuntimeMessage(tAST_Node *Node, const char *Type, const char *Format, ...)
+{
+ va_list args;
+
+ if(Node) {
+ fprintf(stderr, "%s:%i: ", Node->File, Node->Line);
+ }
+ fprintf(stderr, "%s: ", Type);
+ va_start(args, Format);
+ vfprintf(stderr, Format, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+}
+void AST_RuntimeError(tAST_Node *Node, const char *Format, ...)
+{
+ va_list args;
+
+ if(Node) {
+ fprintf(stderr, "%s:%i: ", Node->File, Node->Line);
+ }
+ fprintf(stderr, "error: ");
+ va_start(args, Format);
+ vfprintf(stderr, Format, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+}
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au