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error.c
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error.c
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/*ident "@(#)cls4:src/error.c 1.6" */
/*******************************************************************************
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THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of AT&T and UNIX System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.
error.c :
write error messages
Until scan_started != 0 no context can be assumed
***************************************************************************/
#ifdef __cplusplus
#include <stdlib.h>
#endif
#include "cfront.h"
#include "size.h"
#include "template.h"
int error_count;
// static int no_of_warnings;
char scan_started;
#define ERRTRACE 20
static char *abbrev_tbl[] = {
" argument",
" base",
" class",
" declaration",
" expression",
" function",
" global",
"H",
" initialize",
#if EBCDIC
"",
"",
"",
"",
"",
"",
"", // fill out hole in ebcdic character set
#endif
"J",
" constructor", // 'K' !
" list",
" member",
" name",
" object",
" pointer",
" qualifie",
" reference",
#if EBCDIC
"",
"",
"",
"",
"",
"",
"", // fill out hole in ebcdic character set
#endif
" statement",
" type",
" undefined",
" variable",
" with",
" expected", // 'X'
" template", // 'Y'???
" parameter", // 'Z'???
};
ea *ea0;
// ea::ea(const void* pp) {
// p=pp;
//}
void error_init() {
static char errbuf[BUFSIZ];
setbuf(stderr, errbuf);
ea0 = new ea;
}
#define INTERNAL 127
#ifdef TEST_SUITE
#define INTERNAL2 126
#define SORRY 125
#endif
void ext(int n) {
int useit = n; // to avoid n not used warning during build
// for testing only
// if (n == INTERNAL)
// abort();
#ifdef TEST_SUITE
if (n == INTERNAL)
error_count = 99;
else if (n == SORRY)
error_count = 100;
#endif
fflush(out_file);
fflush(stderr);
exit(error_count ? error_count : 1);
}
/* static */
void print_loc() {
loc *sl = (Cstmt) ? &Cstmt->where : 0;
loc *dl = (Cdcl && (Cdcl->base == NAME || Cdcl->base == TNAME)) ? &Cdcl->where : 0;
if (sl && dl && sl->file == dl->file) { // Cstmt and Cdcl in same file
if (sl->line <= dl->line) {
if (curloc.file == dl->file && curloc.line < dl->line)
// hack to compensate for YACC's
// bad manners in the use of line numbers
sl->put(out_file);
else
dl->put(out_file);
} else
sl->put(out_file);
} else if (sl && sl->file == curr_file) // Cstmt in current file
sl->put(out_file);
else if (dl && dl->file == curr_file) // Cdcl in current file
dl->put(out_file);
else
curloc.put(out_file);
}
static void print_context() {
putc('\n', out_file);
}
static char in_error = 0;
static loc dummy_loc;
void yyerror(const char *s) {
if (s && *s) {
#ifdef SVR42
// Convert any upper-case chars to lower-case. The yyerror()
// calls in SVR4.2 contain upper-case chars which would get
// translated in error() otherwise.
char *s2 = new char[(strlen(s) + 1)];
const char *beg;
for (beg = strcpy(s2, s); *s2; ++s2) {
if (*s2 >= 'A' && *s2 <= 'Z')
*s2 += ' ';
}
error(beg);
delete (char *) beg;
#else
error(s);
#endif
} else {
error("yyerror() called with null argument");
}
}
int error(const char *s) {
return error(0, s);
}
int error(int t, const char *s) {
return error(t, &dummy_loc, s, *ea0, *ea0, *ea0, *ea0);
}
int error(const char *s, const ea &a0, const ea &a1, const ea &a2, const ea &a3) {
return error(0, &dummy_loc, s, a0, a1, a2, a3);
}
int error(loc *lc, const char *s, const ea &a0, const ea &a1, const ea &a2, const ea &a3) {
return error(0, lc, s, a0, a1, a2, a3);
}
int error(int t, const char *s, const ea &a0, const ea &a1, const ea &a2, const ea &a3) {
return error(t, &dummy_loc, s, a0, a1, a2, a3);
}
int suppress_error;
int error(int t, loc *lc, const char *s, const ea &a0, const ea &a1, const ea &a2, const ea &a3)
/*
"int" not "void" because of "pch" in lex.c
legal error types are:
not counted in error count:
'w' warning
'd' debug
'D' debug -- no prefix
'C' text -- line no. and no newline
'c' text -- no line no. and no newline
counted in error count:
's' "not implemented" message
'l' "compiler limit exceeded" message
0 error
'e' error -- no newline
'i' internal error (causes abort)
't' error while printing error message
*/
{
if (suppress_error && t != 'i' && t != 'd')
return 0;
if (in_error++)
if (t == 't')
t = 'i';
else if (4 < in_error) {
fprintf(stderr, "\nOops!, error while handling error\n");
ext(13);
}
FILE *of = out_file;
out_file = stderr;
if (!scan_started || t == 't')
putch('\n');
else if (lc != &dummy_loc) {
if (t != 'D' && t != 'c')
lc->put(out_file);
} else {
if (t != 'D' && t != 'c')
print_loc();
}
int user_error = 0;
switch (t) {
case 'C':
case 'c':
break;
case 'e':
user_error = 1;
// no break
case 0:
putstring("error: ");
user_error += 1;
break;
case 'd':
putstring("DEBUG: ");
case 'D':
break;
case 'w':
// no_of_warnings++;
putstring("warning: ");
break;
case 'l':
putstring("compiler limit exceeded: ");
break;
case 's':
putstring("sorry, not implemented: ");
user_error = 1;
break;
case 'i':
if (error_count++) {
fprintf(out_file, "sorry, cannot recover from earlier errors\n");
out_file = of; // restore for fflush()
#ifdef TEST_SUITE
ext(INTERNAL2);
#else
ext(INTERNAL);
#endif
} else
fprintf(out_file, "internal %s error: ", prog_name);
}
ea argv[4];
ea *a = argv;
argv[0] = a0;
argv[1] = a1;
argv[2] = a2;
argv[3] = a3;
int c;
while (c = *s++) {
if ('A' <= c && c <= 'Z')
putstring(abbrev_tbl[c - 'A']);
else if (c == '%') {
switch (c = *s++) {
case 'k': // TOK assumed passed as an int
{
TOK x = TOK(a->i);
if (0 < x && x <= MAXTOK && keys[x])
fprintf(out_file, " %s", keys[x]);
else
fprintf(out_file, " token(%d)", x);
break;
}
case 't': // Ptype
{
Ptype tt = Ptype(a->p);
if (tt == 0)
break;
putch(' ');
int nt = ntok;
emode = 1;
tt->dcl_print(0);
emode = 0;
ntok = nt;
break;
}
case 'n': // Pname
{
Pname nn = Pname(a->p);
if (nn && nn->string) {
// suppress generated class names:
if (nn->string[0] == '_' && nn->string[1] == '_' && nn->string[2] == 'C')
break;
emode = 1;
putch(' ');
nn->print();
emode = 0;
} else
putstring(" ?");
break;
}
case 'p': // pointer
{
const char *f = sizeof(char *) == sizeof(int) ? " %d" : " %ld";
fprintf(out_file, f, a->p);
break;
}
case 'a': // fully qualified function
{
Pname nn = Pname(a->p);
if (nn->tp->base != FCT && nn->tp->base != OVERLOAD)
error('i', "%n not function", nn);
if (nn && nn->string) {
// suppress generated class names:
if (nn->string[0] == '_' && nn->string[1] == '_' && nn->string[2] == 'C')
break;
emode = 1;
putch(' ');
nn->print(1);
emode = 0;
} else
putstring(" ?");
break;
}
case 'c': // char assumed passed as an int
putch((int) a->i);
break;
case 'd': // int
fprintf(out_file, " %d", a->i);
break;
case 'o': // int
fprintf(out_file, " 0%o", a->i);
break;
case 's': // char*
{
char *s = ((char *) a->p);
if (s)
putst((char *) a->p);
break;
}
}
a++;
} else
putch(c);
}
/*
switch (t) {
case 'd':
case 't':
case 'w':
putch('\n');
break;
default:
*/
if (t != 'c' && t != 'e' && t != 'C')
print_context();
/*
}
*/
if (user_error)
basic_inst::head->print_error_loc(user_error == 2);
out_file = of; // restore before ext() for fflush()
if (!scan_started && t != 'd' && t != 'w')
ext(4);
// now we may want to carry on
switch (t) {
case 't':
if (--in_error) {
fflush(stderr);
// fflush(out_file);
return 0;
}
case 'i':
ext(INTERNAL);
case 0:
case 'e':
case 'l':
case 's':
#ifdef TEST_SUITE
if (t == 's')
ext(SORRY);
#endif
if (MAXERR < ++error_count) {
fprintf(stderr, "Sorry, too many errors\n");
ext(7);
}
}
in_error = 0;
fflush(stderr);
// fflush(out_file);
return 0;
}
#ifdef DBG
#define OPEREP(v) ((v) > MAXTOK || (v) <= 0 ? 0 : keys[v])
void display_type(Ptype t) {
if (t) {
putc(' ', stderr);
FILE *of = out_file;
out_file = stderr;
extern int ntok;
int nt = ntok;
emode = 1;
(t)->dcl_print(0);
emode = 0;
if (!t->allocated)
fprintf(stderr, " UNALLOCATED!");
ntok = nt;
out_file = of;
} else
fprintf(stderr, " <null type>");
fflush(stderr);
}
#define INDENT(in) \
{ \
for (int i = in; i > 0; --i) \
fprintf(stderr, " "); \
}
static indent = 0;
void display_context(dcl_context *p, char *label, int oneline) {
int nt = ntok;
if (label && *label)
fprintf(stderr, "%s: ", label);
fprintf(stderr, "dcl_context %d {\n", p);
++indent;
INDENT(indent);
fprintf(stderr, "cot:");
display_type(p->cot);
fprintf(stderr, "\n");
display_expr(p->not, "not", oneline);
INDENT(indent);
putstring("tot:");
display_type(p->tot);
fprintf(stderr, "\n");
display_expr(p->nof, "nof", oneline);
display_expr(p->c_this, "c_this", oneline);
INDENT(indent);
fprintf(stderr, "ftbl %d\n", p->ftbl);
--indent;
fprintf(stderr, "}\n");
fflush(stderr);
}
void display_expr(Pexpr ptr, char *label, int oneline) {
INDENT(indent);
if (label)
fprintf(stderr, "%s:", label);
if (ptr == 0) {
fprintf(stderr, "NULL EXPR\n");
fflush(stderr);
return;
}
fprintf(stderr, "%d", ptr->node::id);
if (!ptr->allocated)
fprintf(stderr, " UNALLOCATED!");
putc(':', stderr);
char *s = OPEREP(ptr->base);
if (s == 0)
fprintf(stderr, "token(%d)", ptr->base);
else
fprintf(stderr, "%s", s);
if (ptr->displayed) { // recursion!!!
switch (ptr->base) {
case NAME:
case TNAME:
case DTOR:
case STRING:
case ICON:
case FCON:
case CCON:
fprintf(stderr, " '%s'", (ptr->string) ? ptr->string : "<0>");
break;
case IVAL:
fprintf(stderr, " i1==%d", ptr->i1);
break;
}
fprintf(stderr, " RECURSION!!!\n");
ptr->displayed = 0;
fflush(stderr);
return;
}
ptr->displayed = 1;
switch (ptr->base) {
case QUEST:
display_type(ptr->tp);
putc('\n', stderr);
if (!oneline) {
++indent;
display_expr(ptr->cond, "cond");
display_expr(ptr->e1, "e1");
display_expr(ptr->e2, "e2");
--indent;
}
break;
case REF:
case DOT:
display_type(ptr->tp);
putc('\n', stderr);
if (!oneline) {
++indent;
display_expr(ptr->e1, "e1");
display_expr(ptr->mem, "mem");
display_expr(ptr->n_initializer, "n_initializer");
--indent;
}
break;
case MDOT:
display_type(ptr->tp);
fprintf(stderr, " string2:'%s'\n", ptr->string2 ? ptr->string2 : "");
if (!oneline) {
++indent;
display_expr(ptr->mem, "mem");
--indent;
}
break;
case ICALL:
fprintf(stderr, " fn=='%s'", ptr->il->fct_name->string);
display_type(ptr->tp);
putc('\n', stderr);
if (!oneline) {
++indent;
for (int i = 0; i < ptr->il->i_slots; ++i) {
ia *aa = &ptr->il->i_args[i];
INDENT(indent);
fprintf(stderr, "arg:'%s'",
aa->local && aa->local->string ? aa->local->string : "");
display_type(aa->tp);
putc('\n', stderr);
++indent;
display_expr(aa->arg, "actual");
--indent;
}
display_expr(ptr->e1, "e1");
display_expr(ptr->e2, "e2");
--indent;
}
break;
case SIZEOF:
if (ptr->tp2) {
putc('(', stderr);
display_type(ptr->tp2);
putc(')', stderr);
}
display_type(ptr->tp);
putc('\n', stderr);
if (!oneline) {
if (ptr->e1) {
++indent;
display_expr(ptr->e1, "e1");
--indent;
}
if (ptr->e2) {
++indent;
display_expr(ptr->e2, "e2");
--indent;
}
}
break;
case ZERO:
display_type(ptr->tp);
putc('\n', stderr);
break;
case DTOR:
fprintf(stderr, " '%s'", (ptr->string) ? ptr->string : "<0>");
display_type(ptr->tp);
if (ptr->permanent)
fprintf(stderr, " (permanent)");
putc('\n', stderr);
if (!oneline) {
Pname n = Pname(ptr);
++indent;
INDENT(indent);
fprintf(stderr, "tp2");
display_type(ptr->tp2);
fprintf(stderr, "tpdef");
display_type(ptr->tpdef);
putc('\n', stderr);
INDENT(indent);
display_expr(n->n_qualifier, "n_qualifier");
display_expr(n->n_dtag, "n_dtag");
--indent;
}
break;
case NAME:
case TNAME:
case STRING:
case ICON:
case FCON:
case CCON:
case IVAL:
if (ptr->base == IVAL)
fprintf(stderr, " i1==%d", ptr->i1);
else
fprintf(stderr, " '%s'", (ptr->string) ? ptr->string : "<0>");
display_type(ptr->tp);
if (ptr->string2)
fprintf(stderr, " string2=='%s'", ptr->string2);
if (ptr->permanent)
fprintf(stderr, " (permanent)");
putc('\n', stderr);
if (!oneline && (ptr->base == NAME || ptr->base == TNAME)) {
Pname n = Pname(ptr);
++indent;
INDENT(indent);
fprintf(stderr, "n_key==%d", n->n_key);
fprintf(stderr, " n_sto==%d", n->n_sto);
fprintf(stderr, " n_stclass==%d", n->n_stclass);
fprintf(stderr, " n_scope==%d", n->n_scope);
fprintf(stderr, " n_protected==%d\n", n->n_protect);
INDENT(indent);
fprintf(stderr, "n_oper=='%s'", (s = OPEREP(n->base)) ? s : "0");
fprintf(stderr, " n_val==%d", n->n_val);
fprintf(stderr, " n_xref==%d", n->n_xref);
fprintf(stderr, " lex_level==%d\n", n->lex_level);
INDENT(indent);
fprintf(stderr, " table==%d%d", n->n_table, n->n_table ? n->n_table->t_name : 0);
fprintf(stderr, " ktable==%d%d\n", n->n_ktable, n->n_ktable ? n->n_ktable->k_name : 0);
INDENT(indent);
fprintf(stderr, "n_used==%d", n->n_used);
fprintf(stderr, " n_assigned_to==%d", n->n_assigned_to);
fprintf(stderr, " n_addr_taken==%d\n", n->n_addr_taken);
INDENT(indent);
fprintf(stderr, "n_anon==%s", n->n_anon);
fprintf(stderr, " n_list=='%s'", n->n_list ? n->n_list->string : "<0>");
fprintf(stderr, " n_qualifier=='%s'", n->n_qualifier ? n->n_qualifier->string : "<0>");
if (n->n_initializer) {
fprintf(stderr, " n_initializer:\n");
++indent;
display_expr(n->n_initializer);
--indent;
} else
fprintf(stderr, " n_initializer==<0>\n");
--indent;
}
break;
case BLOCK:
((Pstmt) ptr)->where.put(stderr);
putc(' ', stderr);
putc('\n', stderr);
break;
default:
display_type(ptr->tp);
putc('\n', stderr);
if (!oneline && ptr->base > 0 && (ptr->base < 165 || ptr->base == MEMPTR)) {
++indent;
display_expr(ptr->e1, "e1");
display_expr(ptr->e2, "e2");
--indent;
}
break;
}
ptr->displayed = 0;
fflush(stderr);
return;
}
void display_stmt(Pstmt ptr, char *label, int oneline) {
INDENT(indent);
if (label)
fprintf(stderr, "%s:", label);
if (ptr == 0) {
fprintf(stderr, "NULL STMT\n");
fflush(stderr);
return;
}
fprintf(stderr, "%d", ptr->node::id);
if (!ptr->allocated)
fprintf(stderr, " UNALLOCATED!");
putc(':', stderr);
char *s = OPEREP(ptr->base);
if (s == 0)
fprintf(stderr, "token(%d)", ptr->base);
else
fprintf(stderr, "%s", s);
if (ptr->displayed) { // recursion!!!
if (ptr->base == NAME)
fprintf(stderr, " '%s'", Pname(ptr)->string);
fprintf(stderr, " RECURSION!!!\n");
ptr->displayed = 0;
fflush(stderr);
return;
}
putc(' ', stderr);
ptr->where.put(stderr);
if (oneline) {
putc('\n', stderr);
fflush(stderr);
return;
}
ptr->displayed = 1;
switch (ptr->base) {
case BLOCK:
fprintf(stderr, " .. ");
ptr->where2.put(stderr);
putc('\n', stderr);
++indent;
{
for (Pstmt st = ptr->s; st; st = st->s_list)
display_stmt(ptr->s, "s");
}
--indent;
break;
case IF:
putc('\n', stderr);
++indent;
display_expr(ptr->e, "cond");
display_stmt(ptr->s, "if-clause");
--indent;
if (ptr->else_stmt) {
INDENT(indent);
fprintf(stderr, "else\n");
++indent;
display_stmt(ptr->else_stmt, "else-clause");
--indent;
}
break;
case DO:
putc('\n', stderr);
++indent;
display_stmt(ptr->s, "do-stmt");
display_expr(ptr->e, "cond");
--indent;
break;
case WHILE:
putc('\n', stderr);
++indent;
display_expr(ptr->e, "cond");
display_stmt(ptr->s, "while-stmt");
--indent;
break;
case FOR:
putc('\n', stderr);
++indent;
display_stmt(ptr->for_init, "init");
display_expr(ptr->e, "cond");
display_expr(ptr->e2, "incr");
display_stmt(ptr->s, "stmt");
--indent;
break;
case RETURN:
putc('\n', stderr);
++indent;
display_expr(ptr->e, "e");
--indent;
break;
case SM:
putc('\n', stderr);
++indent;
display_expr(ptr->e, "e");
--indent;
break;
default:
putc('\n', stderr);
break;
}
ptr->displayed = 0;
fflush(stderr);
return;
}
void display_namelist(Plist nl, char *s, int verbose) {
error('d', "namelist: %s", s ? s : "");
++indent;
for (Plist l = nl; l; l = l->l) {
Pname n = l->f;
INDENT(indent);
fprintf(stderr, " %d", n);
error('D', " %n %k n_key %d", n, n ? n->tp->base : 0, n ? n->n_key : 0);
if (verbose) {
++indent;
display_expr(n);
--indent;
}
}
--indent;
}
#endif