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/* type.c - type and storage-class routines for bcc */
/* Copyright (C) 1992 Bruce Evans */
#include "bcc.h"
#include "align.h"
#include "gencode.h" /* s.b. switches.h */
#include "sc.h"
#include "scan.h"
#include "table.h"
#undef EXTERN
#define EXTERN
#include "type.h"
PUBLIC uoffset_T ctypesize = 1;
PUBLIC uoffset_T dtypesize = 8;
PUBLIC uoffset_T ftypesize = 0;
PUBLIC uoffset_T itypesize = 2;
PUBLIC uoffset_T ptypesize = 2;
PUBLIC uoffset_T stypesize = 2;
PRIVATE char skey0;
PRIVATE char skey1;
PUBLIC struct typestruct *addstruct(structname)
char *structname;
{
unsigned namelength;
struct symstruct *symptr;
struct typestruct *structype;
(structype = newtype())->constructor = STRUCTU;
structype->alignmask = ctype->alignmask;
if (++skey1 == 0)
{
++skey1; /* must be nonzero or key string would end */
++skey0; /* will never reach 'A' to be an identifier */
}
structype->structkey[0] = skey0;
structype->structkey[1] = skey1;
if (*structname != 0)
{
symptr = addlorg(structname, structype);
symptr->storage = 0;
symptr->flags = STRUCTNAME;
if (charptr + (namelength = strlen(structname)) >= chartop)
growheap(namelength + 1);
#ifdef TS
++ts_n_structname;
ts_s_structname += namelength + 1;
#endif
structype->tname = strcpy(charptr, structname);
charptr += namelength + 1;
}
return structype;
}
#ifndef VERY_SMALL_MEMORY
PUBLIC void laststruct(char *sname)
{
sname[0] = skey0;
sname[1] = skey1;
}
#endif
PUBLIC struct typestruct *iscalartotype(scalar)
scalar_pt scalar;
{
if (scalar & LONG)
{
if (scalar & UNSIGNED)
return ultype;
return ltype;
}
if (scalar & UNSIGNED)
return uitype;
return itype;
}
PUBLIC struct typestruct *newtype()
{
register struct typestruct *type;
type = qmalloc(sizeof *type);
#ifdef TS
++ts_n_type;
ts_s_type += sizeof *type;
#endif
type->typesize = /* (uoffset_T) */
type->scalar = /* (scalar_t) */
type->constructor = /* (constr_t) */
type->structkey[0] = 0;
type->nexttype =
type->prevtype =
type->sidetype = NULL;
type->listtype = NULL;
type->tname = "";
return type;
}
PUBLIC void outntypechar(type)
struct typestruct *type;
{
outnbyte(*type->tname);
}
PUBLIC struct typestruct *pointype(type)
struct typestruct *type;
{
return prefix(POINTER, ptypesize, type);
}
PUBLIC struct typestruct *prefix(constructor, size, type)
constr_pt constructor;
uoffset_T size;
struct typestruct *type;
{
register struct typestruct *searchtype;
for (searchtype = type->prevtype; searchtype != NULL;
searchtype = searchtype->sidetype)
if (searchtype->constructor == (constr_t) constructor &&
searchtype->typesize == size)
return searchtype;
switch ((searchtype = newtype())->constructor = constructor)
{
case ARRAY:
searchtype->alignmask = type->alignmask;
break;
case FUNCTION:
searchtype->alignmask = ~(uoffset_T) 0;
break;
case POINTER:
searchtype->alignmask = ~(ptypesize - 1) | alignmask;
break;
case STRUCTU:
bugerror("prefixing structure/union");
searchtype->alignmask = alignmask;
break;
}
searchtype->typesize = size;
searchtype->nexttype = type;
searchtype->sidetype = type->prevtype;
return type->prevtype = searchtype;
}
PUBLIC struct typestruct *promote(type)
struct typestruct *type;
{
scalar_t scalar;
if ((scalar = type->scalar) & (CHAR | SHORT))
{
if (scalar & UNSIGNED)
return uitype;
return itype;
}
if (scalar & FLOAT)
return dtype;
if (type->constructor & ARRAY)
return pointype(type->nexttype);
if (type->constructor & FUNCTION)
return pointype(type);
return type;
}
PUBLIC struct typestruct *tosigned(type)
struct typestruct *type;
{
switch (type->scalar & ~(UNSIGNED | DLONG))
{
case CHAR:
return sctype;
case SHORT:
return stype;
case INT:
return itype;
case LONG:
return ltype;
default:
error("signed only applies to integral types");
return type;
}
}
PUBLIC struct typestruct *tounsigned(type)
struct typestruct *type;
{
switch (type->scalar & ~(UNSIGNED | DLONG))
{
case CHAR:
return uctype;
case SHORT:
return ustype;
case INT:
return uitype;
case LONG:
return ultype;
default:
error("unsigned only applies to integral types");
return type;
}
}
PUBLIC void typeinit()
{
#ifdef I80386
if (i386_32)
{
uitype->typesize =
itype->typesize =
ptypesize =
itypesize = 4;
dtype->alignmask =
fltype->alignmask =
uitype->alignmask =
ltype->alignmask =
ultype->alignmask =
itype->alignmask = ~(uoffset_T) (4 - 1);
ltype->scalar = LONG; /* not DLONG */
ultype->scalar = UNSIGNED | LONG;
}
#endif
fitype = prefix(FUNCTION, ftypesize, itype);
pctype = pointype(ctype);
skey0 = 1;
vtype->constructor = VOID;
}
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