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print2.c
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print2.c
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/*ident "@(#)cls4:src/print2.c 1.36" */
/*******************************************************************************
C++ source for the C++ Language System, Release 3.0. This product
is a new release of the original cfront developed in the computer
science research center of AT&T Bell Laboratories.
Copyright (c) 1993 UNIX System Laboratories, Inc.
Copyright (c) 1991, 1992 AT&T and UNIX System Laboratories, Inc.
Copyright (c) 1984, 1989, 1990 AT&T. All Rights Reserved.
THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of AT&T and UNIX System
Laboratories, Inc. The copyright notice above does not evidence
any actual or intended publication of such source code.
print2.c:
print names and declarations
****************************************************************************/
#include "cfront.h"
#include "template.h"
bit TCast;
bit Cast;
int last_ll = 1;
Pin curr_icall;
char emode;
int ntok;
bit mk_zero_init_flag = 0;
static int MAIN; // fudge to get _main() called by main()
#define eprint(e) \
if (e) \
Eprint(e)
#ifdef DENSE
void chop(char *);
#endif
static Ptable mem_table;
static Ptable perm_table;
static int mem_depth;
extern int dem_opt_mem;
extern int dem_opt_local;
int ispt_data(Pname n) {
if (!n->tp || !n->n_table || !n->n_table->t_name || !n->n_table->t_name->tp)
return 0;
char *s = Pclass(n->n_table->t_name->tp)->string;
while (*s) {
if (!strncmp(s, "__pt__", 6))
return 1;
s++;
}
return 0;
}
static void begin_mem() {
if (!dem_opt_mem)
return;
if (!mem_depth++)
mem_table = new table(16, 0, 0);
}
static void end_mem() {
if (!dem_opt_mem)
return;
if (!--mem_depth) {
delete mem_table;
mem_table = 0;
}
}
static int dem_mem(char *cn, char *mn) {
char buf[1024];
Pname n;
if (!cn || !mn || !*cn || !*mn)
error('i', "invalidA to dem_mem()");
sprintf(buf, "%s__%s", cn, mn);
if (mem_table) {
if (mem_table->look(mn, 0)) {
if (!perm_table)
perm_table = new table(16, 0, 0);
n = new name(buf);
perm_table->insert(n, 0);
delete n;
return 0;
} else {
n = new name(mn);
mem_table->insert(n, 0);
delete n;
return 1;
}
} else {
return !perm_table || !perm_table->look(buf, 0);
}
}
void puttok(TOK t)
/*
print the output representation of "t"
*/
{
putstring(keys[t]);
if (12 < ntok++) {
ntok = 0;
if (emode == 0)
last_line.putline();
} else if (t == SM) {
ntok = 0;
putch('\n');
if (last_ll)
last_line.line++;
} else
putch(' ');
}
#define MX 20
#define NTBUF 10
static class dcl_buf {
/*
buffer for assembling declaration (or cast)
left contains CONST_PTR => *CONST
CONST_RPTR => &CONST
PTR => *
RPTR => &
LP => (
right contains RP => )
VEC => [ rnode ]
FCT => ( rnode )
FIELD => : rnode
*/
Pbase b;
Pname n;
TOK left[MX], right[MX];
Pnode rnode[MX];
Pclass lnode[MX];
int li, ri;
bit cf;
public:
void init(Pname nn) {
b = 0;
n = nn;
cf = li = ri = 0;
}
void base(Pbase bb, bit const_flag = 0) {
b = bb;
cf = const_flag;
}
void front(TOK t) {
left[++li] = t;
}
void front(Pclass c) {
left[++li] = MEMPTR;
lnode[li] = c;
}
void back(TOK t, Pnode nod) {
right[++ri] = t;
rnode[ri] = nod;
}
void paran() {
front(LP);
back(RP, 0);
}
void put();
} * tbufvec[NTBUF] = { 0 }, *tbuf = 0;
static int freetbuf = 0;
void dcl_buf::put() {
int i;
Pfct ff = 0;
if (MX <= li || MX <= ri)
error('i', "T buffer overflow");
if (n && n->n_sto && n->n_sto != REGISTER && n->n_sto != AUTO)
puttok(n->n_sto);
if (b == 0)
#ifdef DBG
if (emode) {
fprintf(out_file, "?b==0?");
return;
} else
#endif
error('i', "noBT%s", Cast ? " in cast" : "");
else {
bit ac_save;
if (cf) {
ac_save = b->ansi_const;
b->ansi_const = 1;
}
b->dcl_print();
if (cf)
b->ansi_const = ac_save;
}
for (; li; li--) {
switch (left[li]) {
case LP:
putch('(');
break;
case PTR:
putch('*');
break;
case RPTR:
if (emode)
putch('&');
else
putch('*');
break;
case CONST_PTR:
if (emode || ansi_opt && Cast == 0)
putstring("*const ");
else
putch('*');
break;
case CONST_RPTR:
if (emode)
putstring("&const ");
else if (ansi_opt && Cast == 0)
putstring("*const ");
else
putch('*');
break;
case MEMPTR:
if (lnode[li])
fprintf(out_file, "%s::", lnode[li]->string);
}
}
if (n)
n->print();
for (i = 1; i <= ri; i++) {
switch (right[i]) {
case RP:
putch(')');
break;
case VEC:
putch('[');
{
Pvec v = (Pvec) rnode[i];
Pexpr d = v->dim;
int s = v->size;
if (d)
d->print();
if (s)
fprintf(out_file, "%d", s);
}
putch(']');
break;
case FCT: // beware of function returning pointer to
// function expressed witout typedef
{
Pfct f = Pfct(rnode[i]);
if (f->body)
ff = f;
f->dcl_print();
break;
}
case FIELD: {
Pbase f = (Pbase) rnode[i];
Pexpr d = (Pexpr) f->b_name;
int s = f->b_bits;
putch(':');
if (d)
d->print();
else if (s)
fprintf(out_file, "%d", s);
else
puttok(ZERO);
break;
}
}
}
void print_body(Pfct);
if (ff && emode == 0)
print_body(ff);
}
Pexpr mk_zero_init(Ptype tt, Pname obname, Pname currname)
/*
creates 0 initializer for defined objects
side effect: generates right nesting level for {}
*/
{
if (dtpt_opt && mk_zero_init_flag)
return 0;
tt = tt->skiptypedefs();
switch (tt->base) {
case VEC: // type a[size]; => type a[size] = {0};
{
if (obname == currname && !ispt_data(obname)) {
// xxx initializing vectors blows up the size of some programs
return 0;
} else {
Pexpr i = mk_zero_init(Pvec(tt)->typ, obname, currname);
if (i == 0)
return 0;
return new expr(ILIST, i, 0);
}
}
case COBJ: // "X a;" == "X a = {0};"
{
Pclass cl = Pclass(Pbase(tt)->b_name->tp);
if (!ansi_opt && (cl->csu == ANON || cl->csu == UNION)) {
if (warning_opt) {
// ridiculous handstands to avoid printing
// compiler generated names in warning
Ptype tn = obname->tp;
for (;;)
if (tn->base == VEC)
tn = Pvec(tn)->typ;
else
break;
if (obname == currname && tt == tn) {
if (cl->string[0] == '_' && cl->string[1] == '_')
error('w', &obname->where,
"cannot generate zeroIr for%n ofT union; toI, compile with +a1 or "
"insert non-union object as first member",
obname);
else
error('w', &obname->where,
"cannot generate zeroIr for%n ofT%t; toI, compile with +a1 or insert "
"non-union object as first member",
obname, obname->tp);
} else {
Pclass cx;
if (tn->base == COBJ && (cx = (Pclass) Pbase(tn)->b_name->tp)
&& cx->string[0] == '_' && cx->string[1] == '_')
error('w', &obname->where,
"cannot generate zeroIr for%n (union or aggregate with union as "
"first element); toI, compile with +a1 or insert non-union object as "
"first member",
obname);
else
error('w', &obname->where,
"cannot generate zeroIr for%n ofT%t (union or aggregate with union "
"as first element); toI, compile with +a1 or insert non-union object "
"as first member",
obname, obname->tp);
}
} // if warning_opt
return 0;
}
Pbcl l = cl->baselist;
while (l) {
if (l->base == NAME)
cl = l->bclass;
else
return new expr(ILIST, zero, 0);
l = cl->baselist;
}
int i = 1;
Pname nn = cl->memtbl->get_mem(i);
for (; nn; NEXT_NAME(cl->memtbl, nn, i)) {
if (nn->base == TNAME || nn->tp == 0)
continue;
Ptype tx = nn->tp->skiptypedefs();
if (nn->base == NAME && nn->n_anon == 0 && tx->base != FCT && tx->base != OVERLOAD
&& tx->base != CLASS && tx->base != ENUM && nn->n_stclass != STATIC
&& nn->n_stclass != ENUM) {
Pexpr i = mk_zero_init(tx, obname, nn);
if (i == 0)
return 0;
return new expr(ILIST, i, 0);
}
}
return 0;
}
case PTR:
if (tt->memptr()) {
Pexpr i = new expr(ELIST, zero, zero);
return new expr(ILIST, i, zero);
}
// no break
case RPTR:
case CHAR:
case SHORT:
case INT:
case EOBJ:
case LONG:
case FLOAT:
case DOUBLE:
case LDOUBLE: // "int a;" == "int a = 0;"
case FIELD:
case ANY:
return zero;
}
return 0;
}
void fct::arg_print()
/* print function arguments and type of function */
{
putch('(');
for (Pname nn = argtype; nn;) {
nn->tp->dcl_print(0);
if (nn = nn->n_list)
puttok(CM);
else
break;
}
switch (nargs_known) {
case 0: // putst("?"); break;
case ELLIPSIS:
puttok(ELLIPSIS);
break;
}
putch(')');
if (f_const)
puttok(CONST);
if (f_static)
puttok(STATIC); // wrong place for ``static''
}
void name::dcl_print(TOK list)
/*
Print the declaration for a name (list==0) or a name list (list!=0):
For each name
(1) print storage class
(2) print base type
(3) print the name with its declarators
Avoid (illegal) repetition of basetypes which are class or enum declarations
(A name list may contain names with different base types)
list == SM : terminator SM
list == 0: single declaration with terminator SM
list == CM : separator CM
*/
{
if (error_count)
return;
// error('d',"name::dcl_print this is %n",this);
if (n_stclass == STATIC)
tp->ansi_const = 1;
for (Pname n = this; n; n = n->n_list) {
Ptype t = n->tp;
int sm = 0;
if (t == 0)
error('i', "N::dcl_print(%n)T missing", n);
if (n->n_stclass == ENUM)
if (list)
continue;
else
return;
if (n->where.line != last_line.line || n->where.file != last_line.file)
if (last_ll = n->where.line)
n->where.putline();
else
last_line.putline();
bit tc = 0;
Ptype tt = t->skiptypedefs(tc);
switch (t->base) {
case CLASS:
if (n->base != TNAME) {
Pclass(t)->dcl_print(n);
}
sm = 1;
break;
case ENUM:
Penum(t)->dcl_print(0);
sm = 1;
break;
case FCT: {
Pfct f = Pfct(t);
if (dtpt_opt && all_flag == 0 && curloc.file != first_file && f->f_inline == 0
&& f->f_is_inline == 0 && !(n->n_sto == STATIC && !n->n_stclass) && none_flag == 0)
f->body = 0;
if (t->is_templ_instance() && current_fct_instantiation != f) {
if (n->n_addr_taken == 1 && current_fct_instantiation == 0
&& (f->f_inline || f->last_expanded))
// special case of inline needing to printed
// permit it to continue ...
;
else
return;
}
if (n->base == TNAME)
puttok(TYPEDEF);
if (n->n_dcl_printed == 2 // definition already printed
|| n->n_dcl_printed == 1 && f->body == 0 // declaration already printed
) {
// don't print again
sm = 1; // no SM
break;
}
if (f->f_result == 0)
make_res(f);
if (f->body && n->n_sto == EXTERN)
n->n_sto = 0;
if (f->f_inline && (n->n_table != gtbl || strcmp(n->string, "main"))) {
if (debug_opt) {
if (f->defined & DEFINED && f->defined & SIMPLIFIED && f->f_inline != ITOR)
goto prnt_def;
else if (n->n_dcl_printed == 0)
goto prnt_dcl;
else {
sm = 1;
break;
}
}
if (f->f_virtual || n->n_addr_taken) {
prnt_dcl:
TOK st = n->n_sto;
Pblock b = f->body;
f->body = 0;
t->dcl_print(n);
n->n_dcl_printed = 1;
n->n_sto = st;
f->body = b;
break;
} else
sm = 1; // no SM
} else if ((f->defined & DEFINED) == 0 || (f->defined & SIMPLIFIED) == 0)
goto prnt_dcl;
else if (n->n_table == gtbl && strcmp(n->string, "main") == 0) {
if (f->f_inline) {
error(&n->where, "main() cannot be declared inline");
f->f_inline = 0;
n->n_sto = 0;
}
if (n->n_sto == STATIC) {
error(&n->where, "main() cannot be declared static");
n->n_sto = 0;
}
MAIN = 1;
gtbl->look("main", 0)->use();
f->f_signature = 0;
t->dcl_print(n);
n->n_dcl_printed = f->body ? 2 : 1;
MAIN = 0;
} else {
prnt_def:
if (n->n_oper == CTOR || n->n_oper == DTOR) {
Pclass cl = Pclass(n->n_table->t_name->tp);
if (cl->c_body == 3)
cl->print_all_vtbls(cl);
}
if (n->n_sto == STATIC && pdef_name == 0 && def_name == 0) {
pdef_name = n;
if (last_ll = n->where.line)
n->where.putline();
else
last_line.putline();
}
t->dcl_print(n);
n->n_dcl_printed = f->body ? 2 : 1;
}
if (f->body)
sm = 1;
break;
}
case OVERLOAD: {
for (Plist gl = Pgen(t)->fct_list; gl; gl = gl->l) {
Pname nn = gl->f;
Pfct f = (Pfct) nn->tp;
if (f->defined)
nn->dcl_print(0);
sm = 1;
}
break;
}
case ASM:
fprintf(out_file, "asm(\"%s\")\n", (char *) Pbase(t)->b_name);
break;
case INT:
case EOBJ:
case CHAR:
case LONG:
case SHORT:
tcx:
// do not allocate space for constants unless necessary
if (tc && n->n_sto != EXTERN // extern const one;
// const one = 1;
// allocates storage
&& (n->n_scope == EXTERN // FUDGE const one = 1;
// is treated as static
// need loader support
|| n->n_scope == STATIC || n->n_scope == FCT)) {
if (n->n_evaluated && n->n_addr_taken == 0) {
sm = 1; /* no ; */
break;
}
}
tc = 0;
// no break;
default: {
Pexpr saveinit = n->n_initializer;
TOK savesto = n->n_sto;
Pexpr i = n->n_initializer;
if (n->base == TNAME && n->tpdef)
i = 0;
if (dtpt_opt && all_flag == 0 && n->n_scope != STATIC && none_flag == 0
&& curloc.file != first_file) {
if (n->base == TNAME && n->tpdef)
; // do nothing
else {
n->n_initializer = i = 0;
mk_zero_init_flag = 1;
if (n->n_scope == EXTERN && Pbase(t)->b_const == 0)
n->n_sto = EXTERN;
}
}
if (tc) {
switch (tt->base) {
case CHAR:
case SHORT:
case INT:
case LONG:
case EOBJ:
goto tcx;
}
}
if (n->base == TNAME) {
// error('d',"%s->dcl_print %k lex_level: %d", n->string, n->base, n->lex_level );
/* Always print template formals, even when they have the same
* formal name, since the instantiation name is different. This
* fix should not be required when the copy mechanism is in place. */
if (!n_template_arg) {
// Pname tn=k_find_name(n->string,Ctbl,HIDDEN);
// if (tn && tn->lex_level && t==tn->tp)
// return;
if (n->lex_level)
return;
}
puttok(TYPEDEF);
}
if (n->n_stclass == REGISTER) {
// (imperfect) check against member functions
// register s a; a.f() illegal
Pname cln = n->tp->is_cl_obj();
if (cln) {
Pclass cl = Pclass(cln->tp);
if (cl->csu != CLASS && cl->baselist == 0 && cl->has_itor() == 0
&& cl->virt_count == 0 && !n->n_addr_taken)
puttok(REGISTER);
} else if (!n->n_addr_taken)
puttok(REGISTER);
}
if (i) {
if (n->n_sto == EXTERN && n->n_stclass == STATIC) {
n->n_initializer = 0;
t->dcl_print(n);
puttok(SM);
n->n_initializer = i;
n->n_sto = 0;
t->dcl_print(n);
n->n_sto = EXTERN;
} else
t->dcl_print(n);
if (n->n_table) {
Pname nn = n->n_table->look(n->string, 0);
if (nn)
nn->n_dcl_printed = 1;
else
n->n_dcl_printed = 1;
} else
n->n_dcl_printed = 1;
} else if (n->n_evaluated && Pbase(t)->b_const) {
if (n->n_sto == EXTERN && n->n_stclass == STATIC) {
int v = n->n_evaluated;
n->n_evaluated = 0;
t->dcl_print(n);
puttok(SM);
if (n->where.line != last_line.line || n->where.file != last_line.file)
if (last_ll = n->where.line)
n->where.putline();
else
last_line.putline();
n->n_evaluated = v;
n->n_sto = 0;
t->dcl_print(n);
n->n_sto = EXTERN;
} else
t->dcl_print(n);
if (n->n_table) {
Pname nn = n->n_table->look(n->string, 0);
if (nn)
nn->n_dcl_printed = 1;
else
n->n_dcl_printed = 1;
} else
n->n_dcl_printed = 1;
} else {
Ptype tempt = t->skiptypedefs();
if (tempt->base == COBJ) {
Pname cln = n->tp->is_cl_obj();
if (cln) {
Pclass cl = (Pclass) cln->tp;
Pname ctor = cl->has_ctor();
if (n->n_table != gtbl && n->n_sto != EXTERN && n->n_evaluated == 0
&& n_stclass == STATIC && ctor)
n->n_initializer = i = mk_zero_init(t, n, n);
}
}
if ((n->n_sto == 0 || n->n_val && n->n_evaluated == 0) && n_stclass == STATIC
&& n->n_sto != STATIC && (n->n_table == gtbl || ispt_data(n))) {
if (n->n_val && n->n_evaluated == 0) {
// extern x = f();
// generate int x = 0;
// plus dynamic initialization
n->n_sto = 0;
}
n->n_initializer = i = mk_zero_init(t, n, n);
}
t->dcl_print(n);
if (n->n_table) {
Pname nn = n->n_table->look(n->string, 0);
if (nn)
nn->n_dcl_printed = 1;
else
n->n_dcl_printed = 1;
} else
n->n_dcl_printed = 1;
}
if (n->n_scope != ARG) {
if (i) {
puttok(ASSIGN);
Pexpr i2 = i;
while (i2->base == CAST || i2->base == G_CAST)
i2 = i2->e1;
if (i2->base == ILIST)
i = i2;
if (t != i->tp && i->base != ZERO && i->base != ILIST) {
Ptype t1 = n->tp->skiptypedefs();
switch (t1->base) {
default:
i->print();
break;
case VEC:
if (Pvec(t1)->typ->base == CHAR) {
i->print();
break;
}
// no break
case PTR:
case RPTR:
if (i->tp == 0
|| (!ansi_opt && Pptr(t)->typ
&& Pptr(t)->typ->skiptypedefs()->base == VEC
&& i->base != G_CAST && i->base != CAST)
|| n->tp->check(i->tp, 0)) {
putch('(');
bit oc = Cast;
Cast = 1;
t->print();
Cast = oc;
putch(')');
}
eprint(i);
}
} else {
if (i == zero) {
while (t->base == TYPE)
t = Pbase(t)->b_name->tp;
}
eprint(i);
}
} else if (n->n_evaluated) {
puttok(ASSIGN);
if (n->tp->base != INT || n->tp->is_unsigned()) {
putstring("((");
bit oc = Cast;
Cast = 1;
n->tp->print();
Cast = oc;
fprintf(out_file, ")%d)", n->n_val);
} else
fprintf(out_file, "%d", n->n_val);
}
}
n->n_initializer = saveinit;
n->n_sto = savesto;
}
}
switch (list) {
case SM:
if (sm == 0)
puttok(SM);
break;
case 0:
if (sm == 0)
puttok(SM);
return;
case CM:
if (n->n_list)
puttok(CM);
break;
}
}
}
char *local_sign(Ptype pt) { // get function signature for local class
char buf[1024];
char *bb = pt->signature(buf);
int ll = bb - buf;
if (1023 < ll)
error('i', "local class N buffer overflow");
char *p = new char[ll + 1];
strcpy(p, buf);
return p;
}
void enumdef::dcl_print(Pname cln) {
// note: ***** modify to handle local enums
char *s = nested_sig ? nested_sig : (cln ? cln->string : 0);
if (nested_sig)
fprintf(out_file, "enum __%s { ", nested_sig);
else
fprintf(out_file, "enum %s { ", local_sig ? local_sig : string);
for (Pname px, p = mem; p; p = px) {
px = p->n_list;
if (s) {
if (p->n_evaluated)
fprintf(out_file, "%s__%s = %d", p->string, s, p->n_val);
else
fprintf(out_file, "%s__%s", p->string, s);
} else {
if (p->n_evaluated)
fprintf(out_file, "%s = %d", p->string, p->n_val);
else
fprintf(out_file, "%s", p->string);
}
if (px)
puttok(CM);
p->n_initializer = 0;
// nested enum within a class template
if (in_class == 0 || in_class->class_base != INSTANTIATED)
delete p;
}
if (in_class == 0 || in_class->class_base != INSTANTIATED)
mem = 0;
else
e_body = 3; // already printed
puttok(RC);
puttok(SM);
}
void name::print(bit fullprint) { // print just the name itself
if (this == 0)
error('i', "0->N::print()");
if (string == 0) {
if (emode)
putch('?');
return;
}
switch (base) {
case TNAME:
// SYM -- NESTED stuff removed
if (tpdef == 0) {
switch (tp->base) {
default:
error('i', "missing tpdef forTdefN %s", string);
case COBJ:
case EOBJ:
Pbase(tp)->b_name->print();
}
} else if (tpdef->nested_sig) {
if (emode == 0) {
putstring(" __");
putst(tpdef->nested_sig);
} else {
Pbase(tpdef->in_class->k_tbl->k_name->tp)->b_name->print();
putstring("::");
putstring(string);
}
} else if (emode)
putstring(string);
else
putst(n_template_arg_string ? n_template_arg_string : string);
return;
case MDOT:
Pexpr(this)->print();
return;
}
if (emode) {
Ptable tbl = 0;
bit f = 0;
if (tp) {
switch (tp->base) {
case OVERLOAD:
case FCT: {
f = 1;
Pfct ft;
if (tp->base == FCT)
ft = fct_type();
else
ft = Pfct(Pgen(tp)->fct_list->f->tp);
if (fullprint && ft->returns && ft->returns->base != VOID)
ft->returns->print();
}
default:
if (tbl = n_table) {
if (tbl == gtbl) {
if (f == 0)
putstring("::");
} else {
if (tbl->t_name) {
tbl->t_name->print();
fprintf(out_file, "::");
}
}
}
if (n_scope == ARG && strcmp(string, "this") == 0) {
// tell which "this" it is
Ptype tt = Pptr(tp)->typ;
Pname cn = Pbase(tt)->b_name;
fprintf(out_file, "%s::", cn->string);
}
break;
case CLASS:
case ENUM:
if (tp->local_sig) {
fprintf(out_file, "%s(local to ", string);
tp->in_fct->print();
fprintf(out_file, ")");
return;
} else {
if (tp->nested_sig) {
Pbase(tp->in_class->k_tbl->k_name->tp)->b_name->print();
fprintf(out_file, "::");
}
if (tp->base == CLASS) {
Ptclass pc = Ptclass(tp);
if (pc->class_base == INSTANTIATED)
pc->inst->print_pretty_name();
else
putstring(string);
} else
putstring(string);
return;
}
}
nop:
switch (n_oper) {
case TYPE:
putstring("operator ");
if (tp && Pfct(tp)->returns)
Pfct(tp)->returns->dcl_print(0);
break;