MiniJava-Compiler/ast.cpp at master · jimicy/MiniJava-Compiler · GitHub

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#include"ast.h"
#include"main.h"

// Return a string representing the struct type passed in
constchar *ast_type_str(ast_type type)
{
switch (type.type)
	{
caseVAR_BOOL:
return"boolean";
caseVAR_INT:
return"int";
caseVAR_INT_ARRAY:
return"int[]";
caseVAR_CLASS:
return type.classname;
caseVAR_STRING_ARRAY:
return"String[]";
caseVAR_VOID:
return"void";
default:
return"-- UNKNOWN TYPE --";
	}
}

// Map the id of the parent class to `this` in Method(this, arg1, arg2,..)
voidinitialize_var_declaration_this(ast_methoddecl *class_methods, char* classname) {
for (ast_methoddecl *method=class_methods; method!=NULL; method = method->next) {
for (ast_vardecl *param = method->params; param!=NULL; param = param->next) {
if (param->id == "this") {
 param->type.classname = classname;
 }
 }
	}
}

// Write to the file, the appropriate indent for the indent level
voidprint_indent(FILE *file, int indent_level)
{
int i;
for(i = 0; i < indent_level; ++i)
fputs("", file);
}

// Print the `ast_expr`
voidast_expr_print(FILE *file, int indent_level, ast_expr *expr)
{
if(expr == NULL)
return; // If ExpList is empty, print nothing
print_indent(file, indent_level);

char *op_str;

switch(expr->type)
	{
caseINT_CONST:
fprintf(file, "INT_CONST(%d)\n", expr->int_const);
break;
caseBOOL_CONST:
fprintf(file, "BOOL_CONST(%s)\n", expr->bool_const ? "true" : "false");
break;
caseVARNAME:
fprintf(file, "VARNAME(%s)\n", expr->id);
break;
caseTHIS_PTR:
fprintf(file, "THIS_PTR\n");
break;
caseNOT_EXPR:
fprintf(file, "NOT_EXPR:\n");
ast_expr_print(file, indent_level + 1, expr->expr);
break;
caseNEW_CLASS:
fprintf(file, "NEW_CLASS(%s)\n", expr->id);
break;
caseNEW_INT_ARRAY:
fprintf(file, "NEW_INT_ARRAY[\n");
ast_expr_print(file, indent_level + 1, expr->expr);
print_indent(file, indent_level);
fprintf(file, "]\n");
break;
caseARRAY_LENGTH:
fprintf(file, "ARRAY_LENGTH:\n");
ast_expr_print(file, indent_level + 1, expr->expr);
break;
caseARRAY_INDEX:
fprintf(file, "ARRAY_INDEX:\n");
ast_expr_print(file, indent_level + 1, expr->array);
print_indent(file, indent_level+1);
fprintf(file, "[\n");
ast_expr_print(file, indent_level + 1, expr->array_index);
print_indent(file, indent_level+1);
fprintf(file, "]\n");
break;
caseMETHOD_CALL:
fprintf(file, "METHOD_CALL(%s):\n", expr->method);
print_indent(file, indent_level + 1);
fprintf(file, "OBJECT:\n");
ast_expr_print(file, indent_level + 2, expr->object);
print_indent(file, indent_level + 1);
fprintf(file, "EXP_LIST:\n");
ast_expr_print(file, indent_level + 2, expr->exp_list);
break;
caseBINOP:
switch(expr->oper) {
caseAND:
 op_str = "AND";
break;
caseLESS:
 op_str = "LESS";
break;
casePLUS:
 op_str = "PLUS";
break;
caseMINUS:
 op_str = "MINUS";
break;
caseMULT:
 op_str = "MULT";
break;
default:
 op_str = "--- UNKNOWN OPERAND ---";
break;
 }
fprintf(file, "BINOP(%s):\n", op_str);
print_indent(file, indent_level + 1);
fprintf(file, "LHS:\n");
ast_expr_print(file, indent_level + 2, expr->lhs);
print_indent(file, indent_level + 1);
fprintf(file, "RHS:\n");
ast_expr_print(file, indent_level + 2, expr->rhs);
break;
default:
fprintf(file, "--- UNKNOWN EXPRESSION ---\n");
break;
	}
if(expr->next != NULL) // ExpList
ast_expr_print(file, indent_level, expr->next);
}

// Print the ast struct `ast_stmt`.
// This prints all statements list by looping through the linked list `->next` reference
voidast_stmt_print(FILE *file, int indent_level, ast_stmt *stmt)
{
if(stmt == NULL)
return; // If StmtList is empty, print nothing.
print_indent(file, indent_level);

switch(stmt->type)
	{
caseBLOCK:
fputs("BLOCK:\n", file);
ast_stmt_print(file, indent_level+1, stmt->stmt_list);
break;
caseIF_ELSE:
fprintf(file, "IF_ELSE:\n");
print_indent(file, indent_level + 1);
fprintf(file, "COND:\n");
ast_expr_print(file, indent_level+2, stmt->cond);
print_indent(file, indent_level + 1);
fprintf(file, "TRUE:\n");
ast_stmt_print(file, indent_level+2, stmt->true_branch);
print_indent(file, indent_level + 1);
fprintf(file, "FALSE:\n");
ast_stmt_print(file, indent_level+2, stmt->false_branch);
break;
caseWHILE_STMT:
fprintf(file, "WHILE_STMT:\n");
print_indent(file, indent_level + 1);
fprintf(file, "COND:\n");
ast_expr_print(file, indent_level+2, stmt->cond);
print_indent(file, indent_level + 1);
fprintf(file, "WHILE_TRUE:\n");
ast_stmt_print(file, indent_level+2, stmt->while_branch);
break;
caseSYS_OUT:
fprintf(file, "SYS_OUT:\n");
ast_expr_print(file, indent_level + 1, stmt->expr);
break;
caseVAR_ASSIGN:
fprintf(file, "VAR_ASSIGN(%s):\n", stmt->id);
print_indent(file, indent_level + 1);
fprintf(file, "EXPRESSION:\n");
ast_expr_print(file, indent_level + 2, stmt->assign_expr);
break;
caseARRAY_ASSIGN:
fprintf(file, "ARRAY_ASSIGN(%s):\n", stmt->id);
print_indent(file, indent_level + 1);
fprintf(file, "INDEX:\n");
ast_expr_print(file, indent_level + 2, stmt->array_index);
print_indent(file, indent_level + 1);
fprintf(file, "EXPRESSION:\n");
ast_expr_print(file, indent_level + 2, stmt->assign_expr);
break;
default:
fprintf(file, "--- UNKNOWN STATEMENT ---\n");
break;
	}
if(stmt->next != NULL) // StmtList
ast_stmt_print(file, indent_level, stmt->next);
}

// Print the ast struct `ast_vardecl`.
// This prints all variable declarations by looping through the linked list `->next` reference
voidast_vardecl_print(FILE *file, int indent_level, ast_vardecl *decl)
{
if(decl == NULL)
return; // If VarList is empty, print nothing.

print_indent(file, indent_level);
fprintf(file, "%s : %s\n", decl->id, ast_type_str(decl->type));

if(decl->next != NULL)
ast_vardecl_print(file, indent_level, decl->next);
}

// Print the ast struct `ast_methoddecl`.
// This prints all method declarations by looping through the linked list `->next` reference
voidast_method_print(FILE *file, int indent_level, ast_methoddecl *method)
{
if(method == NULL)
return; // If MethodList is empty, print nothing.

print_indent(file, indent_level);
fprintf(file, "MethodDeclaration(%s : %s):\n", method->id, ast_type_str(method->type));
print_indent(file, indent_level + 1);
fprintf(file, "PARAMETERS:\n");
ast_vardecl_print(file, indent_level + 2, method->params);
print_indent(file, indent_level + 1);
fprintf(file, "VarDeclaration:\n");
ast_vardecl_print(file, indent_level + 2, method->var_decl);
print_indent(file, indent_level + 1);
fprintf(file, "BODY:\n");
ast_stmt_print(file, indent_level + 2, method->body);
print_indent(file, indent_level + 1);
fprintf(file, "RETURN:\n");
ast_expr_print(file, indent_level + 2, method->return_expr);

if(method->next != NULL) // StmtList
ast_method_print(file, indent_level, method->next);
}

// Print the ast struct `ast_classdecl`.
// This prints all class declarations by looping through the linked list `->next` reference
voidast_class_print(FILE *file, int indent_level, ast_classdecl *class_declaration)
{
if(class_declaration == NULL)
return; // If MethodList is empty, print nothing.

print_indent(file, indent_level);
fprintf(file, "ClassDeclaration(%s):\n", class_declaration->id);
print_indent(file, indent_level + 1);
fprintf(file, "FIELDS:\n");
ast_vardecl_print(file, indent_level + 2, class_declaration->fields);
print_indent(file, indent_level + 1);
fprintf(file, "METHODS:\n");
ast_method_print(file, indent_level + 2, class_declaration->methods);

if(class_declaration->next != NULL) // StmtList
ast_class_print(file, indent_level, class_declaration->next);
}

// Print the ast struct `ast_mainclass`
voidast_main_print(FILE *file, int indent_level, ast_mainclass *main_class)
{
print_indent(file, indent_level);
fprintf(file, "MainClass(%s):\n", main_class->id);
ast_method_print(file, indent_level + 1, main_class->method);
}

// Print our AST
voidast_program_print(FILE *file, int indent_level, ast_program *program)
{
print_indent(file, indent_level);
fprintf(file, "PROGRAM:\n");
ast_main_print(file, indent_level + 1, &program->main_class);
print_indent(file, indent_level + 1);
fprintf(file, "CLASSES:\n");
ast_class_print(file, indent_level + 2, program->class_list);
}