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/* File: int.c
* Time-stamp: <99/03/18 13:15:39 panic>
* Author: Arne John Glenstrup <panic@diku.dk>
* Description: Interpreter example: syntax constructors
*/
#include <string.h>
#ifdef __CMIX__
# include "stdio.h"
# include "stdlib.h"
#else
# include <stdio.h>
# include <stdlib.h>
#endif
#include "cint.h"
Exp* CONST(Value constValue) {
Exp* e = (Exp*)malloc(1 * sizeof(Exp));
e->tag = Const;
e->constValue = constValue;
return e;
}
Exp* VAR(const char* varName) {
Exp* e = (Exp*)malloc(1 * sizeof(Exp));
char* tmp = (char*)malloc(strlen(varName) + 1);
strcpy(tmp, varName);
e->tag = Var;
e->varName = tmp;
return e;
}
Exp* UNOP(OpTag operat, Exp* exp1) {
Exp* e = (Exp*)malloc(1 * sizeof(Exp));
e->tag = UnOp;
e->operat = operat;
e->exp1 = exp1;
return e;
}
Exp* BINOP(OpTag operat, Exp* exp1, Exp* exp2) {
Exp* e = (Exp*)malloc(1 * sizeof(Exp));
e->tag = BinOp;
e->operat = operat;
e->exp1 = exp1;
e->exp2 = exp2;
return e;
}
void DELEXP(Exp* e) {
if (e) {
switch (e->tag) {
case Const : break;
case Var : free((char*)(e->varName)); break;
case UnOp : DELEXP(e->exp1); break;
case BinOp : DELEXP(e->exp1); DELEXP(e->exp2); break;
}
free(e);
}
}
Decl* DECL(const char* name, Decl* next) {
Decl* d = (Decl*)malloc(1 * sizeof(Decl));
char* tmp = (char*)malloc(strlen(name + 1));
strcpy(tmp, name);
d->name = tmp; d->next = next;
return d;
}
void DELDECL(Decl* d) {
if (d) {
DELDECL(d->next);
free((char*)(d->name));
free(d);
}
}
Stmt* EXPRESSION(Exp* exp, Stmt* next) {
Stmt* s = (Stmt*)malloc(1 * sizeof(Stmt));
s->tag = Expression;
s->exp = exp;
s->next = next;
return s;
}
Stmt* IFELSE(Exp* exp, Stmt* ifStmt, Stmt* elseStmt, Stmt* next) {
Stmt* s = (Stmt*)malloc(1 * sizeof(Stmt));
s->tag = IfElse;
s->exp = exp;
s->ifStmt = ifStmt;
s->elseStmt = elseStmt;
s->next = next;
return s;
}
Stmt* WHILE(Exp* exp, Stmt* whileStmts, Stmt* next) {
Stmt* s = (Stmt*)malloc(1 * sizeof(Stmt));
s->tag = While;
s->exp = exp;
s->whileStmts = whileStmts;
s->next = next;
return s;
}
Stmt* RETURN(Exp* exp, Stmt* next) {
Stmt* s = (Stmt*)malloc(1 * sizeof(Stmt));
s->tag = Return;
s->exp = exp;
s->next = next;
return s;
}
Stmt* COMPOUND(Decl* decls, Stmt* stmts, Stmt* next) {
Stmt* s = (Stmt*)malloc(1 * sizeof(Stmt));
s->tag = Compound;
s->decls = decls;
s->stmts = stmts;
s->next = next;
return s;
}
void DELSTMT(Stmt* s) {
if (s) {
switch (s->tag) {
case Expression : DELEXP(s->exp); break;
case IfElse :
DELEXP(s->exp); DELSTMT(s->ifStmt); DELSTMT(s->elseStmt); break;
case While : DELEXP(s->exp); DELSTMT(s->whileStmts); break;
case Return : DELEXP(s->exp); break;
case Compound : DELDECL(s->decls); DELSTMT(s->stmts); break;
}
DELSTMT(s->next);
free(s);
}
}
Formal* FORMAL(const char* name, Formal* next) {
Formal* p = (Formal*)malloc(1 * sizeof(Formal));
char* tmp = (char*)malloc(strlen(name) + 1);
strcpy(tmp, name);
p->name = tmp;
p->next = next;
return p;
}
void DELFORMAL(Formal* p) {
if (p) {
free((char*)(p->name));
DELFORMAL(p->next);
free(p);
}
}
Func* FUNC(const char* name, Formal* params, Stmt* stmts, Func* next) {
Func* f = (Func*)malloc(1 * sizeof(Func));
char* tmp = (char*)malloc(strlen(name) + 1);
strcpy(tmp, name);
f->name = tmp;
f->params = params; f->stmts = stmts; f->next = next;
return f;
}
void DELFUNC(Func* f) {
if (f) {
free(f->name);
DELFORMAL(f->params);
DELSTMT(f->stmts);
DELFUNC(f->next);
}
}
Prog* PROG(Func* funcs) {
Prog* p = (Prog*)malloc(1 * sizeof(Prog));
p->funcs = funcs;
return p;
}
void DELPROG(Prog* p) {
if (p) {
DELFUNC(p->funcs);
free(p);
}
}
boolean val2boolean(Value v) { return v; }
int val2int (Value v) { return v; }
Value int2val(int i) { return i; }
Value uminus (Value v) { return -v; }
Value negate (Value v) { return !v; }
Value plus (Value v1, Value v2) { return v1 + v2; }
Value minus (Value v1, Value v2) { return v1 - v2; }
Value multiply(Value v1, Value v2) { return v1 * v2; }
Value divide (Value v1, Value v2) { return v1 / v2; }
Value eq (Value v1, Value v2) { return v1 == v2; }
Value ne (Value v1, Value v2) { return v1 != v2; }
Value gt (Value v1, Value v2) { return v1 > v2; }
Value lt (Value v1, Value v2) { return v1 < v2; }
Value ge (Value v1, Value v2) { return v1 >= v2; }
Value le (Value v1, Value v2) { return v1 <= v2; }
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