/*
 * 68K/386 32-bit C compiler.
 *
 * copyright (c) 1997, David Lindauer
 * 
 * This compiler is intended for educational use.  It may not be used
 * for profit without the express written consent of the author.
 *
 * It may be freely redistributed, as long as this notice remains intact
 * and either the original sources or derived sources 
 * are distributed along with any executables derived from the originals.
 *
 * The author is not responsible for any damages that may arise from use
 * of this software, either idirect or consequential.
 *
 * V1.85 July 2000
 * David Lindauer, camille@bluegrass.net
 *
 * Credits to Mathew Brandt for original K&R C compiler
 *
 */
#include        <stdio.h>
#include				<string.h>
#include        "lists.h"
#include        "expr.h"
#include        "c.h"

extern int prm_cplusplus;
extern char *tn_void;
extern char *tn_char;
extern char *tn_int;
extern char *tn_long;
extern char *tn_short;
extern char *tn_unsigned;
extern char *tn_ellipse;
extern char *tn_float;
extern char *tn_double;
extern char *tn_longdouble;
extern char *tn_const;
extern char *tn_vol;
extern char *tn_class;
extern char *tn_union;
extern char *tn_struct;
extern int prm_cmangle;

int exactype(TYP *typ1, TYP *typ2)
{
	SYM *s1,*s2;
	while (typ1 && typ2) {
		if (typ1->type == bt_ref)
			typ1 = typ1->btp;
		if (typ2->type == bt_ref)
			typ2 = typ2->btp;
		if (typ1->type != typ2->type) {
		  if ((typ1->type != bt_func && typ1->type != bt_ifunc) ||
					(typ2->type != bt_ifunc && typ2->type != bt_func))
				return 0;
		}
		else switch(typ1->type) {
			case bt_void:
				if (typ2->type != bt_void)
					return 0;
			case bt_ifunc:
			case bt_func:
				if (!exactype(typ1->btp,typ2->btp))
					return 0;
				s1 = typ1->lst.head;
				s2 = typ2->lst.head;
				while (s1 && s2 && (s1 != (SYM *)-1) && (s2 != (SYM *)-1)) {
					if (!exactype(s1->tp,s2->tp))
						return 0;
					s1 = s1->next;
					s2 = s2->next;
				}
				return s1 == s2;
			case bt_struct:
			case bt_union:
			case bt_class:
				if (!typ1->sp || !typ2->sp)
					return 0;
				return(!strcmp(typ1->sp->name,typ2->sp->name));
			case bt_pointer:
				if (typ1->btp->type == bt_void || typ2->btp->type == bt_void)
					return 1;
				if (typ1->val_flag != typ2->val_flag && typ1->btp->type == bt_pointer)
					return 0;
		}
		typ1=typ1->btp;
		typ2=typ2->btp;
	}
	return !(typ1 || typ2);
}
int checktype(TYP *typ1, TYP *typ2, int scalarok)
{
#ifdef CPLUSPLUS
	if (prm_cplusplus)
		return exactype(typ1,typ2);
#endif
	if (typ1->type == typ2->type)
		return TRUE;
	else                                                 
		if ((typ2->type == bt_pointer && (typ1->type == bt_ifunc || typ1->type == bt_func || scalarok && isscalar(typ1)))
					 || (typ1->type == bt_pointer && (typ2->type == bt_ifunc || typ2->type == bt_func || scalarok && isscalar(typ2))))
			return(TRUE);
		else
			if (typ1->type == bt_enum) {
				switch (typ2->type) {
					case bt_long: case bt_unsigned:
					case bt_short: case bt_unsignedshort:
					case bt_char: case bt_unsignedchar:
						return(TRUE);
				}
			}
			else
				if (typ2->type == bt_enum) {
					switch (typ1->type) {
						case bt_long: case bt_unsigned:
						case bt_short: case bt_unsignedshort:
						case bt_char: case bt_unsignedchar:
							return(TRUE);
					}
				}
				else
						/* this is so we can put an ampersand in front of a func name we are using */
					if ((typ1->type == bt_pointer && typ2->type == bt_pointer && typ1->btp->type == bt_func) ||
	    				(typ2->type == bt_pointer && typ1->type == bt_pointer && typ2->btp->type == bt_func))
						return TRUE;
  return FALSE;
}
int checktypeassign(TYP *typ1, TYP *typ2)
{
#ifdef CPLUSPLUS
	if (prm_cplusplus)
		return exactype(typ1,typ2);
#endif
	/* this is so we can put an ampersand in front of a func name we are using */
	if ((typ1->type == bt_pointer && typ2->type == bt_pointer && typ1->btp->type == bt_func) ||
			(typ2->type == bt_pointer && typ1->type == bt_pointer && typ2->btp->type == bt_func))
		return TRUE;
	while (typ1 && typ2 && typ1->type == typ2->type && typ1->size == typ2->size) {
		if (isscalar(typ1))
			return TRUE;
		typ1 = typ1->btp;
		typ2 = typ2->btp;
	}
	if (!typ1 && !typ2)
		return(TRUE);
	return(FALSE);
}
#ifdef CPLUSPLUS
static void unm2name(char *buf, SYM *sp)
{
	char *v;
	if (!sp)
		return;
	if (sp->parentclass) {
		unm2name(buf,sp->parentclass);
		strcat(buf,"::");
		buf = buf + strlen(buf);
	}
	v = sp->name;
	if (prm_cmangle)
		v++;
	strcpy(buf,v);
}
static TYP *unmang2(char *buf, TYP *tp)
{
	SYM *sp;
	char name[100];
		switch (tp->type) {
			case bt_func:
				unmang2(buf,tp->btp);
				buf = buf + strlen(buf);
				*buf++ = '(';
				sp = tp->lst.head;
				while (sp && sp != (SYM *)-1) {
					*buf = 0;
					unmang2(buf,sp->tp);
					buf = buf + strlen(buf);
					sp = sp->next;
					if (sp)
						*buf++ = ',';
				}
				*buf++ = ')';
				*buf++ = 0;
				break;
			case bt_float:
				strcpy(buf,tn_float);
				break;
			case bt_double:
				strcpy(buf,tn_double);
				break;
			case bt_longdouble:
				strcpy(buf,tn_longdouble);
				break;
			case bt_unsigned:
				strcpy(buf,tn_unsigned);
				buf = buf + strlen(buf);
			case bt_long:
				strcpy(buf,tn_int);
				break;
			case bt_unsignedshort:
				strcpy(buf,tn_unsigned);
				buf = buf + strlen(buf);
			case bt_short:
				strcpy(buf,tn_short);
				break;
			case bt_unsignedchar:
				strcpy(buf,tn_unsigned);
				buf = buf + strlen(buf);
			case bt_char:
				strcpy(buf,tn_char);
				break;
      case bt_bool:
				strcpy(buf,"bool ");
				break;
			case bt_void:
				strcpy(buf,tn_void);
				break;
			case bt_pointer:
				unmang2(buf,tp->btp);
				*buf++ = ' ';
				*buf++ = '*';
				*buf++ = 0;
				break;
				return tp->btp;
			case bt_ref:
				unmang2(buf,tp->btp);
				*buf++ = ' ';
				*buf++ = '*';
				*buf++ = 0;
				break;
			case bt_ellipse:
				strcpy(buf,tn_ellipse);
				break;
			case bt_memberptr:
				unmang2(buf,tp->btp);
				strcat(buf," ");
				buf = buf + strlen(buf);
				unm2name(buf,tp->sp);
				buf = buf + strlen(buf);
				strcpy(buf,"::*");
				break;
			case bt_matchall:
				strcpy(buf,"???");
				break;
			case bt_class:
				strcpy(buf,tn_class);
				unmangle(name,tp->sp->name);
				strcat(buf,name);
				break;
			case bt_struct:
				strcpy(buf,tn_struct);
				unmangle(name,tp->sp->name);
				strcat(buf,name);
				break;
			case bt_union:
				strcpy(buf,tn_union);
				unmangle(name,tp->sp->name);
				strcat(buf,name);
				break;
		}
	if (tp->cflags & DF_CONST)
		strcat(buf, tn_const);
	if (tp->cflags & DF_VOL)
		strcat(buf, tn_vol);
	return 0;
}
char * typenum(char *buf, TYP *typ)
{
	*buf++ = '(';
	*buf = 0;
	while (typ) {
		typ = unmang2(buf,typ);
		buf = buf+strlen(buf);
		if (typ) 
			*buf++ = ',';
		else
			*buf++ = ')';
	}
	*buf=0;
	return buf;
}
#endif
