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diff --git a/usr.bin/xlint/lint1/Makefile b/usr.bin/xlint/lint1/Makefile
index d5e519a4cada..486801968e90 100644
--- a/usr.bin/xlint/lint1/Makefile
+++ b/usr.bin/xlint/lint1/Makefile
@@ -1,19 +1,19 @@
# $NetBSD: Makefile,v 1.3 1995/07/04 01:53:05 cgd Exp $
PROG= lint1
SRCS= cgram.c scan.c mem1.c mem.c err.c main1.c decl.c tree.c func.c \
init.c emit.c emit1.c
NOMAN=
LDADD+= -ll
DPADD+= ${LIBL}
YFLAGS= -d
CFLAGS+=-I.
LINTFLAGS=-aehpz
-CLEANFILES+=y.tab.h cgram.c scan.c
+CLEANFILES+=cgram.tab.h cgram.c scan.c
BINDIR= /usr/libexec
# XXX: -O causes the gcc to die on the i386, when compiling tree.o
CFLAGS+= -DXXX_BROKEN_GCC
.include <bsd.prog.mk>
diff --git a/usr.bin/xlint/lint1/func.c b/usr.bin/xlint/lint1/func.c
index 5d3a17218c3e..5f6b98921a9b 100644
--- a/usr.bin/xlint/lint1/func.c
+++ b/usr.bin/xlint/lint1/func.c
@@ -1,1261 +1,1261 @@
/* $NetBSD: func.c,v 1.7 1995/10/02 17:31:40 jpo Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jochen Pohl for
* The NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
static char rcsid[] = "$NetBSD: func.c,v 1.7 1995/10/02 17:31:40 jpo Exp $";
#endif
#include <stdlib.h>
#include <string.h>
#include "lint1.h"
-#include "y.tab.h"
+#include "cgram.tab.h"
/*
* Contains a pointer to the symbol table entry of the current function
* definition.
*/
sym_t *funcsym;
/* Is set as long as a statement can be reached. Must be set at level 0. */
int reached = 1;
/*
* Is set as long as NOTREACHED is in effect.
* Is reset everywhere where reached can become 0.
*/
int rchflg;
/*
* In conjunction with reached ontrols printing of "fallthrough on ..."
* warnings.
* Reset by each statement and set by FALLTHROUGH, switch (switch1())
* and case (label()).
*
* Control statements if, for, while and switch do not reset ftflg because
* this must be done by the controled statement. At least for if this is
* important because ** FALLTHROUGH ** after "if (expr) stmnt" is evaluated
* befor the following token, wich causes reduction of above, is read.
* This means that ** FALLTHROUGH ** after "if ..." would always be ignored.
*/
int ftflg;
/* Top element of stack for control statements */
cstk_t *cstk;
/*
* Number of arguments which will be checked for usage in following
* function definition. -1 stands for all arguments.
*
* The position of the last ARGSUSED comment is stored in aupos.
*/
int nargusg = -1;
pos_t aupos;
/*
* Number of arguments of the following function definition whose types
* shall be checked by lint2. -1 stands for all arguments.
*
* The position of the last VARARGS comment is stored in vapos.
*/
int nvararg = -1;
pos_t vapos;
/*
* Both prflstr and scflstrg contain the number of the argument which
* shall be used to check the types of remaining arguments (for PRINTFLIKE
* and SCANFLIKE).
*
* prflpos and scflpos are the positions of the last PRINTFLIKE or
* SCANFLIKE comment.
*/
int prflstrg = -1;
int scflstrg = -1;
pos_t prflpos;
pos_t scflpos;
/*
* Are both plibflg and llibflg set, prototypes are writen as function
* definitions to the output file.
*/
int plibflg;
/*
* Nonzero means that no warnings about constands in conditional
* context are printed.
*/
int ccflg;
/*
* llibflg is set if a lint library shall be created. The effect of
* llibflg is that all defined symbols are treated as used.
* (The LINTLIBRARY comment also resets vflag.)
*/
int llibflg;
/*
* Nonzero if warnings are suppressed by a LINTED directive
*/
int nowarn;
/*
* Nonzero if complaints about use of "long long" are suppressed in
* the next statement or declaration.
*/
int quadflg;
/*
* Puts a new element at the top of the stack used for control statements.
*/
void
pushctrl(env)
int env;
{
cstk_t *ci;
ci = xcalloc(1, sizeof (cstk_t));
ci->c_env = env;
ci->c_nxt = cstk;
cstk = ci;
}
/*
* Removes the top element of the stack used for control statements.
*/
void
popctrl(env)
int env;
{
cstk_t *ci;
clst_t *cl;
if (cstk == NULL || cstk->c_env != env)
lerror("popctrl() 1");
cstk = (ci = cstk)->c_nxt;
while ((cl = ci->c_clst) != NULL) {
ci->c_clst = cl->cl_nxt;
free(cl);
}
if (ci->c_swtype != NULL)
free(ci->c_swtype);
free(ci);
}
/*
* Prints a warning if a statement cannot be reached.
*/
void
chkreach()
{
if (!reached && !rchflg) {
/* statement not reached */
warning(193);
reached = 1;
}
}
/*
* Called after a function declaration which introduces a function definition
* and before an (optional) old style argument declaration list.
*
* Puts all symbols declared in the Prototype or in an old style argument
* list back to the symbol table.
*
* Does the usual checking of storage class, type (return value),
* redeclaration etc..
*/
void
funcdef(fsym)
sym_t *fsym;
{
int n, warn;
sym_t *arg, *sym, *rdsym;
funcsym = fsym;
/*
* Put all symbols declared in the argument list back to the
* symbol table.
*/
for (sym = dcs->d_fpsyms; sym != NULL; sym = sym->s_dlnxt) {
if (sym->s_blklev != -1) {
if (sym->s_blklev != 1)
lerror("funcdef() 1");
inssym(1, sym);
}
}
/*
* In osfunc() we did not know whether it is an old style function
* definition or only an old style declaration, if there are no
* arguments inside the argument list ("f()").
*/
if (!fsym->s_type->t_proto && fsym->s_args == NULL)
fsym->s_osdef = 1;
chktyp(fsym);
/*
* chktyp() checks for almost all possible errors, but not for
* incomplete return values (these are allowed in declarations)
*/
if (fsym->s_type->t_subt->t_tspec != VOID &&
incompl(fsym->s_type->t_subt)) {
/* cannot return incomplete type */
error(67);
}
fsym->s_def = DEF;
if (fsym->s_scl == TYPEDEF) {
fsym->s_scl = EXTERN;
/* illegal storage class */
error(8);
}
if (dcs->d_inline)
fsym->s_inline = 1;
/*
* Arguments in new style function declarations need a name.
* (void is already removed from the list of arguments)
*/
n = 1;
for (arg = fsym->s_type->t_args; arg != NULL; arg = arg->s_nxt) {
if (arg->s_scl == ABSTRACT) {
if (arg->s_name != unnamed)
lerror("funcdef() 2");
/* formal parameter lacks name: param #%d */
error(59, n);
} else {
if (arg->s_name == unnamed)
lerror("funcdef() 3");
}
n++;
}
/*
* We must also remember the position. s_dpos is overwritten
* if this is an old style definition and we had already a
* prototype.
*/
STRUCT_ASSIGN(dcs->d_fdpos, fsym->s_dpos);
if ((rdsym = dcs->d_rdcsym) != NULL) {
if (!isredec(fsym, (warn = 0, &warn))) {
/*
* Print nothing if the newly defined function
* is defined in old style. A better warning will
* be printed in cluparg().
*/
if (warn && !fsym->s_osdef) {
/* redeclaration of %s */
(*(sflag ? error : warning))(27, fsym->s_name);
prevdecl(-1, rdsym);
}
/* copy usage information */
cpuinfo(fsym, rdsym);
/*
* If the old symbol was a prototype and the new
* one is none, overtake the position of the
* declaration of the prototype.
*/
if (fsym->s_osdef && rdsym->s_type->t_proto)
STRUCT_ASSIGN(fsym->s_dpos, rdsym->s_dpos);
/* complete the type */
compltyp(fsym, rdsym);
/* once a function is inline it remains inline */
if (rdsym->s_inline)
fsym->s_inline = 1;
}
/* remove the old symbol from the symbol table */
rmsym(rdsym);
}
if (fsym->s_osdef && !fsym->s_type->t_proto) {
if (sflag && hflag && strcmp(fsym->s_name, "main") != 0)
/* function definition is not a prototyp */
warning(286);
}
if (dcs->d_notyp)
/* return value is implizitly declared to be int */
fsym->s_rimpl = 1;
reached = 1;
}
/*
* Called at the end of a function definition.
*/
void
funcend()
{
sym_t *arg;
int n;
if (reached) {
cstk->c_noretval = 1;
if (funcsym->s_type->t_subt->t_tspec != VOID &&
!funcsym->s_rimpl) {
/* func. %s falls off bottom without returning value */
warning(217, funcsym->s_name);
}
}
/*
* This warning is printed only if the return value was implizitly
* declared to be int. Otherwise the wrong return statement
* has already printed a warning.
*/
if (cstk->c_noretval && cstk->c_retval && funcsym->s_rimpl)
/* function %s has return (e); and return; */
warning(216, funcsym->s_name);
/* Print warnings for unused arguments */
arg = dcs->d_fargs;
n = 0;
while (arg != NULL && (nargusg == -1 || n < nargusg)) {
chkusg1(dcs->d_asm, arg);
arg = arg->s_nxt;
n++;
}
nargusg = -1;
/*
* write the information about the function definition to the
* output file
* inline functions explicitely declared extern are written as
* declarations only.
*/
if (dcs->d_scl == EXTERN && funcsym->s_inline) {
outsym(funcsym, funcsym->s_scl, DECL);
} else {
outfdef(funcsym, &dcs->d_fdpos, cstk->c_retval,
funcsym->s_osdef, dcs->d_fargs);
}
/*
* remove all symbols declared during argument declaration from
* the symbol table
*/
if (dcs->d_nxt != NULL || dcs->d_ctx != EXTERN)
lerror("funcend() 1");
rmsyms(dcs->d_fpsyms);
/* must be set on level 0 */
reached = 1;
}
/*
* Process a label.
*
* typ type of the label (T_NAME, T_DEFAULT or T_CASE).
* sym symbol table entry of label if typ == T_NAME
* tn expression if typ == T_CASE
*/
void
label(typ, sym, tn)
int typ;
sym_t *sym;
tnode_t *tn;
{
cstk_t *ci;
clst_t *cl;
val_t *v, *nv;
tspec_t t;
switch (typ) {
case T_NAME:
if (sym->s_set) {
/* label %s redefined */
error(194, sym->s_name);
} else {
setsflg(sym);
}
break;
case T_CASE:
/* find the stack entry for the innermost switch statement */
for (ci = cstk; ci != NULL && !ci->c_switch; ci = ci->c_nxt) ;
if (ci == NULL) {
/* case not in switch */
error(195);
tn = NULL;
} else if (tn != NULL && tn->tn_op != CON) {
/* non-constant case expression */
error(197);
tn = NULL;
} else if (tn != NULL && !isityp(tn->tn_type->t_tspec)) {
/* non-integral case expression */
error(198);
tn = NULL;
}
if (tn != NULL) {
if (ci->c_swtype == NULL)
lerror("label() 1");
if (reached && !ftflg) {
if (hflag)
/* fallthrough on case statement */
warning(220);
}
t = tn->tn_type->t_tspec;
if (t == LONG || t == ULONG ||
t == QUAD || t == UQUAD) {
if (tflag)
/* case label must be of type ... */
warning(203);
}
/*
* get the value of the expression and convert it
* to the type of the switch expression
*/
v = constant(tn);
nv = xcalloc(1, sizeof (val_t));
cvtcon(CASE, 0, ci->c_swtype, nv, v);
free(v);
/* look if we had this value already */
for (cl = ci->c_clst; cl != NULL; cl = cl->cl_nxt) {
if (cl->cl_val.v_quad == nv->v_quad)
break;
}
if (cl != NULL && isutyp(nv->v_tspec)) {
/* duplicate case in switch, %lu */
error(200, (u_long)nv->v_quad);
} else if (cl != NULL) {
/* duplicate case in switch, %ld */
error(199, (long)nv->v_quad);
} else {
/*
* append the value to the list of
* case values
*/
cl = xcalloc(1, sizeof (clst_t));
STRUCT_ASSIGN(cl->cl_val, *nv);
cl->cl_nxt = ci->c_clst;
ci->c_clst = cl;
}
}
tfreeblk();
break;
case T_DEFAULT:
/* find the stack entry for the innermost switch statement */
for (ci = cstk; ci != NULL && !ci->c_switch; ci = ci->c_nxt) ;
if (ci == NULL) {
/* default outside switch */
error(201);
} else if (ci->c_default) {
/* duplicate default in switch */
error(202);
} else {
if (reached && !ftflg) {
if (hflag)
/* fallthrough on default statement */
warning(284);
}
ci->c_default = 1;
}
break;
};
reached = 1;
}
/*
* T_IF T_LPARN expr T_RPARN
*/
void
if1(tn)
tnode_t *tn;
{
if (tn != NULL)
tn = cconv(tn);
if (tn != NULL)
tn = promote(NOOP, 0, tn);
expr(tn, 0, 1);
pushctrl(T_IF);
}
/*
* if_without_else
* if_without_else T_ELSE
*/
void
if2()
{
cstk->c_rchif = reached ? 1 : 0;
reached = 1;
}
/*
* if_without_else
* if_without_else T_ELSE stmnt
*/
void
if3(els)
int els;
{
if (els) {
reached |= cstk->c_rchif;
} else {
reached = 1;
}
popctrl(T_IF);
}
/*
* T_SWITCH T_LPARN expr T_RPARN
*/
void
switch1(tn)
tnode_t *tn;
{
tspec_t t;
type_t *tp;
if (tn != NULL)
tn = cconv(tn);
if (tn != NULL)
tn = promote(NOOP, 0, tn);
if (tn != NULL && !isityp(tn->tn_type->t_tspec)) {
/* switch expression must have integral type */
error(205);
tn = NULL;
}
if (tn != NULL && tflag) {
t = tn->tn_type->t_tspec;
if (t == LONG || t == ULONG || t == QUAD || t == UQUAD) {
/* switch expr. must be of type `int' in trad. C */
warning(271);
}
}
/*
* Remember the type of the expression. Because its possible
* that (*tp) is allocated on tree memory the type must be
* duplicated. This is not too complicated because it is
* only an integer type.
*/
tp = xcalloc(1, sizeof (type_t));
if (tn != NULL) {
tp->t_tspec = tn->tn_type->t_tspec;
if ((tp->t_isenum = tn->tn_type->t_isenum) != 0)
tp->t_enum = tn->tn_type->t_enum;
} else {
tp->t_tspec = INT;
}
expr(tn, 1, 0);
pushctrl(T_SWITCH);
cstk->c_switch = 1;
cstk->c_swtype = tp;
reached = rchflg = 0;
ftflg = 1;
}
/*
* switch_expr stmnt
*/
void
switch2()
{
int nenum, nclab;
sym_t *esym;
clst_t *cl;
if (cstk->c_swtype == NULL)
lerror("switch2() 1");
/*
* If the switch expression was of type enumeration, count the case
* labels and the number of enumerators. If both counts are not
* equal print a warning.
*/
if (cstk->c_swtype->t_isenum) {
nenum = nclab = 0;
if (cstk->c_swtype->t_enum == NULL)
lerror("switch2() 2");
for (esym = cstk->c_swtype->t_enum->elem;
esym != NULL; esym = esym->s_nxt) {
nenum++;
}
for (cl = cstk->c_clst; cl != NULL; cl = cl->cl_nxt)
nclab++;
if (hflag && eflag && nenum != nclab && !cstk->c_default) {
/* enumeration value(s) not handled in switch */
warning(206);
}
}
if (cstk->c_break) {
/*
* end of switch alway reached (c_break is only set if the
* break statement can be reached).
*/
reached = 1;
} else if (!cstk->c_default &&
(!hflag || !cstk->c_swtype->t_isenum || nenum != nclab)) {
/*
* there are possible values which are not handled in
* switch
*/
reached = 1;
} /*
* otherwise the end of the switch expression is reached
* if the end of the last statement inside it is reached.
*/
popctrl(T_SWITCH);
}
/*
* T_WHILE T_LPARN expr T_RPARN
*/
void
while1(tn)
tnode_t *tn;
{
if (!reached) {
/* loop not entered at top */
warning(207);
reached = 1;
}
if (tn != NULL)
tn = cconv(tn);
if (tn != NULL)
tn = promote(NOOP, 0, tn);
if (tn != NULL && !issclt(tn->tn_type->t_tspec)) {
/* controlling expressions must have scalar type */
error(204);
tn = NULL;
}
pushctrl(T_WHILE);
cstk->c_loop = 1;
if (tn != NULL && tn->tn_op == CON) {
if (isityp(tn->tn_type->t_tspec)) {
cstk->c_infinite = tn->tn_val->v_quad != 0;
} else {
cstk->c_infinite = tn->tn_val->v_ldbl != 0.0;
}
}
expr(tn, 0, 1);
}
/*
* while_expr stmnt
* while_expr error
*/
void
while2()
{
/*
* The end of the loop can be reached if it is no endless loop
* or there was a break statement which was reached.
*/
reached = !cstk->c_infinite || cstk->c_break;
rchflg = 0;
popctrl(T_WHILE);
}
/*
* T_DO
*/
void
do1()
{
if (!reached) {
/* loop not entered at top */
warning(207);
reached = 1;
}
pushctrl(T_DO);
cstk->c_loop = 1;
}
/*
* do stmnt do_while_expr
* do error
*/
void
do2(tn)
tnode_t *tn;
{
/*
* If there was a continue statement the expression controlling the
* loop is reached.
*/
if (cstk->c_cont)
reached = 1;
if (tn != NULL)
tn = cconv(tn);
if (tn != NULL)
tn = promote(NOOP, 0, tn);
if (tn != NULL && !issclt(tn->tn_type->t_tspec)) {
/* controlling expressions must have scalar type */
error(204);
tn = NULL;
}
if (tn != NULL && tn->tn_op == CON) {
if (isityp(tn->tn_type->t_tspec)) {
cstk->c_infinite = tn->tn_val->v_quad != 0;
} else {
cstk->c_infinite = tn->tn_val->v_ldbl != 0.0;
}
}
expr(tn, 0, 1);
/*
* The end of the loop is only reached if it is no endless loop
* or there was a break statement which could be reached.
*/
reached = !cstk->c_infinite || cstk->c_break;
rchflg = 0;
popctrl(T_DO);
}
/*
* T_FOR T_LPARN opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPARN
*/
void
for1(tn1, tn2, tn3)
tnode_t *tn1, *tn2, *tn3;
{
/*
* If there is no initialisation expression it is possible that
* it is intended not to enter the loop at top.
*/
if (tn1 != NULL && !reached) {
/* loop not entered at top */
warning(207);
reached = 1;
}
pushctrl(T_FOR);
cstk->c_loop = 1;
/*
* Store the tree memory for the reinitialisation expression.
* Also remember this expression itself. We must check it at
* the end of the loop to get "used but not set" warnings correct.
*/
cstk->c_fexprm = tsave();
cstk->c_f3expr = tn3;
STRUCT_ASSIGN(cstk->c_fpos, curr_pos);
STRUCT_ASSIGN(cstk->c_cfpos, csrc_pos);
if (tn1 != NULL)
expr(tn1, 0, 0);
if (tn2 != NULL)
tn2 = cconv(tn2);
if (tn2 != NULL)
tn2 = promote(NOOP, 0, tn2);
if (tn2 != NULL && !issclt(tn2->tn_type->t_tspec)) {
/* controlling expressions must have scalar type */
error(204);
tn2 = NULL;
}
if (tn2 != NULL)
expr(tn2, 0, 1);
if (tn2 == NULL) {
cstk->c_infinite = 1;
} else if (tn2->tn_op == CON) {
if (isityp(tn2->tn_type->t_tspec)) {
cstk->c_infinite = tn2->tn_val->v_quad != 0;
} else {
cstk->c_infinite = tn2->tn_val->v_ldbl != 0.0;
}
}
/* Checking the reinitialisation expression is done in for2() */
reached = 1;
}
/*
* for_exprs stmnt
* for_exprs error
*/
void
for2()
{
pos_t cpos, cspos;
tnode_t *tn3;
if (cstk->c_cont)
reached = 1;
STRUCT_ASSIGN(cpos, curr_pos);
STRUCT_ASSIGN(cspos, csrc_pos);
/* Restore the tree memory for the reinitialisation expression */
trestor(cstk->c_fexprm);
tn3 = cstk->c_f3expr;
STRUCT_ASSIGN(curr_pos, cstk->c_fpos);
STRUCT_ASSIGN(csrc_pos, cstk->c_cfpos);
/* simply "statement not reached" would be confusing */
if (!reached && !rchflg) {
/* end-of-loop code not reached */
warning(223);
reached = 1;
}
if (tn3 != NULL) {
expr(tn3, 0, 0);
} else {
tfreeblk();
}
STRUCT_ASSIGN(curr_pos, cpos);
STRUCT_ASSIGN(csrc_pos, cspos);
/* An endless loop without break will never terminate */
reached = cstk->c_break || !cstk->c_infinite;
rchflg = 0;
popctrl(T_FOR);
}
/*
* T_GOTO identifier T_SEMI
* T_GOTO error T_SEMI
*/
void
dogoto(lab)
sym_t *lab;
{
setuflg(lab, 0, 0);
chkreach();
reached = rchflg = 0;
}
/*
* T_BREAK T_SEMI
*/
void
dobreak()
{
cstk_t *ci;
ci = cstk;
while (ci != NULL && !ci->c_loop && !ci->c_switch)
ci = ci->c_nxt;
if (ci == NULL) {
/* break outside loop or switch */
error(208);
} else {
if (reached)
ci->c_break = 1;
}
if (bflag)
chkreach();
reached = rchflg = 0;
}
/*
* T_CONTINUE T_SEMI
*/
void
docont()
{
cstk_t *ci;
for (ci = cstk; ci != NULL && !ci->c_loop; ci = ci->c_nxt) ;
if (ci == NULL) {
/* continue outside loop */
error(209);
} else {
ci->c_cont = 1;
}
chkreach();
reached = rchflg = 0;
}
/*
* T_RETURN T_SEMI
* T_RETURN expr T_SEMI
*/
void
doreturn(tn)
tnode_t *tn;
{
tnode_t *ln, *rn;
cstk_t *ci;
op_t op;
for (ci = cstk; ci->c_nxt != NULL; ci = ci->c_nxt) ;
if (tn != NULL) {
ci->c_retval = 1;
} else {
ci->c_noretval = 1;
}
if (tn != NULL && funcsym->s_type->t_subt->t_tspec == VOID) {
/* void function %s cannot return value */
error(213, funcsym->s_name);
tfreeblk();
tn = NULL;
} else if (tn == NULL && funcsym->s_type->t_subt->t_tspec != VOID) {
/*
* Assume that the function has a return value only if it
* is explicitly declared.
*/
if (!funcsym->s_rimpl)
/* function %s expects to return value */
warning(214, funcsym->s_name);
}
if (tn != NULL) {
/* Create a temporary node for the left side */
ln = tgetblk(sizeof (tnode_t));
ln->tn_op = NAME;
ln->tn_type = tduptyp(funcsym->s_type->t_subt);
ln->tn_type->t_const = 0;
ln->tn_lvalue = 1;
ln->tn_sym = funcsym; /* better than nothing */
tn = build(RETURN, ln, tn);
if (tn != NULL) {
rn = tn->tn_right;
while ((op = rn->tn_op) == CVT || op == PLUS)
rn = rn->tn_left;
if (rn->tn_op == AMPER && rn->tn_left->tn_op == NAME &&
rn->tn_left->tn_sym->s_scl == AUTO) {
/* %s returns pointer to automatic object */
warning(302, funcsym->s_name);
}
}
expr(tn, 1, 0);
} else {
chkreach();
}
reached = rchflg = 0;
}
/*
* Do some cleanup after a global declaration or definition.
* Especially remove informations about unused lint comments.
*/
void
glclup(silent)
int silent;
{
pos_t cpos;
STRUCT_ASSIGN(cpos, curr_pos);
if (nargusg != -1) {
if (!silent) {
STRUCT_ASSIGN(curr_pos, aupos);
/* must precede function definition: %s */
warning(282, "ARGSUSED");
}
nargusg = -1;
}
if (nvararg != -1) {
if (!silent) {
STRUCT_ASSIGN(curr_pos, vapos);
/* must precede function definition: %s */
warning(282, "VARARGS");
}
nvararg = -1;
}
if (prflstrg != -1) {
if (!silent) {
STRUCT_ASSIGN(curr_pos, prflpos);
/* must precede function definition: %s */
warning(282, "PRINTFLIKE");
}
prflstrg = -1;
}
if (scflstrg != -1) {
if (!silent) {
STRUCT_ASSIGN(curr_pos, scflpos);
/* must precede function definition: %s */
warning(282, "SCANFLIKE");
}
scflstrg = -1;
}
STRUCT_ASSIGN(curr_pos, cpos);
dcs->d_asm = 0;
}
/*
* ARGSUSED comment
*
* Only the first n arguments of the following function are checked
* for usage. A missing argument is taken to be 0.
*/
void
argsused(n)
int n;
{
if (n == -1)
n = 0;
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "ARGSUSED");
return;
}
if (nargusg != -1) {
/* duplicate use of ** %s ** */
warning(281, "ARGSUSED");
}
nargusg = n;
STRUCT_ASSIGN(aupos, curr_pos);
}
/*
* VARARGS comment
*
* Makes that lint2 checks only the first n arguments for compatibility
* to the function definition. A missing argument is taken to be 0.
*/
void
varargs(n)
int n;
{
if (n == -1)
n = 0;
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "VARARGS");
return;
}
if (nvararg != -1) {
/* duplicate use of ** %s ** */
warning(281, "VARARGS");
}
nvararg = n;
STRUCT_ASSIGN(vapos, curr_pos);
}
/*
* PRINTFLIKE comment
*
* Check all arguments until the (n-1)-th as usual. The n-th argument is
* used the check the types of remaining arguments.
*/
void
printflike(n)
int n;
{
if (n == -1)
n = 0;
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "PRINTFLIKE");
return;
}
if (prflstrg != -1) {
/* duplicate use of ** %s ** */
warning(281, "PRINTFLIKE");
}
prflstrg = n;
STRUCT_ASSIGN(prflpos, curr_pos);
}
/*
* SCANFLIKE comment
*
* Check all arguments until the (n-1)-th as usual. The n-th argument is
* used the check the types of remaining arguments.
*/
void
scanflike(n)
int n;
{
if (n == -1)
n = 0;
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "SCANFLIKE");
return;
}
if (scflstrg != -1) {
/* duplicate use of ** %s ** */
warning(281, "SCANFLIKE");
}
scflstrg = n;
STRUCT_ASSIGN(scflpos, curr_pos);
}
/*
* Set the linenumber for a CONSTCOND comment. At this and the following
* line no warnings about constants in conditional contexts are printed.
*/
/* ARGSUSED */
void
constcond(n)
int n;
{
ccflg = 1;
}
/*
* Suppress printing of "fallthrough on ..." warnings until next
* statement.
*/
/* ARGSUSED */
void
fallthru(n)
int n;
{
ftflg = 1;
}
/*
* Stop warnings about statements which cannot be reached. Also tells lint
* that the following statements cannot be reached (e.g. after exit()).
*/
/* ARGSUSED */
void
notreach(n)
int n;
{
reached = 0;
rchflg = 1;
}
/* ARGSUSED */
void
lintlib(n)
int n;
{
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "LINTLIBRARY");
return;
}
llibflg = 1;
vflag = 0;
}
/*
* Suppress most warnings at the current and the following line.
*/
/* ARGSUSED */
void
linted(n)
int n;
{
nowarn = 1;
}
/*
* PROTOTLIB in conjunction with LINTLIBRARY can be used to handle
* prototypes like function definitions. This is done if the argument
* to PROTOLIB is nonzero. Otherwise prototypes are handled normaly.
*/
void
protolib(n)
int n;
{
if (dcs->d_ctx != EXTERN) {
/* must be outside function: ** %s ** */
warning(280, "PROTOLIB");
return;
}
plibflg = n == 0 ? 0 : 1;
}
/*
* Set quadflg to nonzero which means that the next statement/declaration
* may use "long long" without an error or warning.
*/
/* ARGSUSED */
void
longlong(n)
int n;
{
quadflg = 1;
}
diff --git a/usr.bin/xlint/lint1/scan.l b/usr.bin/xlint/lint1/scan.l
index 53f0083e3078..3306dec3a247 100644
--- a/usr.bin/xlint/lint1/scan.l
+++ b/usr.bin/xlint/lint1/scan.l
@@ -1,1425 +1,1425 @@
%{
/* $NetBSD: scan.l,v 1.8 1995/10/23 13:38:51 jpo Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jochen Pohl for
* The NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
static char rcsid[] = "$NetBSD: scan.l,v 1.8 1995/10/23 13:38:51 jpo Exp $";
#endif
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <float.h>
#include <ctype.h>
#include <errno.h>
#include <err.h>
#include "lint1.h"
-#include "y.tab.h"
+#include "cgram.tab.h"
#define CHAR_MASK (~(~0 << CHAR_BIT))
/* XXX declaration of strtouq() is missing in stdlib.h ? */
extern u_quad_t strtouq __P((const char *, char **, int));
/* Current position (its also updated when an included file is parsed) */
pos_t curr_pos = { 1, "" };
/*
* Current position in C source (not updated when an included file is
* parsed).
*/
pos_t csrc_pos = { 1, "" };
static void incline __P((void));
static void badchar __P((int));
static sbuf_t *allocsb __P((void));
static void freesb __P((sbuf_t *));
static int inpc __P((void));
static int hash __P((const char *));
static sym_t *search __P((sbuf_t *));
static int name __P((void));
static int keyw __P((sym_t *));
static int icon __P((int));
static int fcon __P((void));
static int operator __P((int, op_t));
static int ccon __P((void));
static int wccon __P((void));
static int getescc __P((int));
static void directive __P((void));
static void comment __P((void));
static int string __P((void));
static int wcstrg __P((void));
%}
L [_A-Za-z]
D [0-9]
NZD [1-9]
OD [0-7]
HD [0-9A-Fa-f]
EX ([eE][+-]?[0-9]+)
%%
{L}({L}|{D})* return (name());
0{OD}*[lLuU]* return (icon(8));
{NZD}{D}*[lLuU]* return (icon(10));
0[xX]{HD}+[lLuU]* return (icon(16));
{D}+\.{D}*{EX}?[fFlL]? |
{D}+{EX}[fFlL]? |
\.{D}+{EX}?[fFlL]? return (fcon());
"=" return (operator(T_ASSIGN, ASSIGN));
"*=" return (operator(T_OPASS, MULASS));
"/=" return (operator(T_OPASS, DIVASS));
"%=" return (operator(T_OPASS, MODASS));
"+=" return (operator(T_OPASS, ADDASS));
"-=" return (operator(T_OPASS, SUBASS));
"<<=" return (operator(T_OPASS, SHLASS));
">>=" return (operator(T_OPASS, SHRASS));
"&=" return (operator(T_OPASS, ANDASS));
"^=" return (operator(T_OPASS, XORASS));
"|=" return (operator(T_OPASS, ORASS));
"||" return (operator(T_LOGOR, LOGOR));
"&&" return (operator(T_LOGAND, LOGAND));
"|" return (operator(T_OR, OR));
"&" return (operator(T_AND, AND));
"^" return (operator(T_XOR, XOR));
"==" return (operator(T_EQOP, EQ));
"!=" return (operator(T_EQOP, NE));
"<" return (operator(T_RELOP, LT));
">" return (operator(T_RELOP, GT));
"<=" return (operator(T_RELOP, LE));
">=" return (operator(T_RELOP, GE));
"<<" return (operator(T_SHFTOP, SHL));
">>" return (operator(T_SHFTOP, SHR));
"++" return (operator(T_INCDEC, INC));
"--" return (operator(T_INCDEC, DEC));
"->" return (operator(T_STROP, ARROW));
"." return (operator(T_STROP, POINT));
"+" return (operator(T_ADDOP, PLUS));
"-" return (operator(T_ADDOP, MINUS));
"*" return (operator(T_MULT, MULT));
"/" return (operator(T_DIVOP, DIV));
"%" return (operator(T_DIVOP, MOD));
"!" return (operator(T_UNOP, NOT));
"~" return (operator(T_UNOP, COMPL));
"\"" return (string());
"L\"" return (wcstrg());
";" return (T_SEMI);
"{" return (T_LBRACE);
"}" return (T_RBRACE);
"," return (T_COMMA);
":" return (T_COLON);
"?" return (T_QUEST);
"[" return (T_LBRACK);
"]" return (T_RBRACK);
"(" return (T_LPARN);
")" return (T_RPARN);
"..." return (T_ELLIPSE);
"'" return (ccon());
"L'" return (wccon());
^#.*$ directive();
\n incline();
\t|" "|\f|\v ;
"/*" comment();
. badchar(yytext[0]);
%%
static void
incline()
{
curr_pos.p_line++;
if (curr_pos.p_file == csrc_pos.p_file)
csrc_pos.p_line++;
}
static void
badchar(c)
int c;
{
/* unknown character \%o */
error(250, c);
}
/*
* Keywords.
* During initialisation they are written to the symbol table.
*/
static struct kwtab {
const char *kw_name; /* keyword */
int kw_token; /* token returned by yylex() */
scl_t kw_scl; /* storage class if kw_token T_SCLASS */
tspec_t kw_tspec; /* type spec. if kw_token T_TYPE or T_SOU */
tqual_t kw_tqual; /* type qual. fi kw_token T_QUAL */
u_int kw_stdc : 1; /* STDC keyword */
u_int kw_gcc : 1; /* GCC keyword */
} kwtab[] = {
{ "asm", T_ASM, 0, 0, 0, 0, 1 },
{ "__asm", T_ASM, 0, 0, 0, 0, 0 },
{ "__asm__", T_ASM, 0, 0, 0, 0, 0 },
{ "auto", T_SCLASS, AUTO, 0, 0, 0, 0 },
{ "break", T_BREAK, 0, 0, 0, 0, 0 },
{ "case", T_CASE, 0, 0, 0, 0, 0 },
{ "char", T_TYPE, 0, CHAR, 0, 0, 0 },
{ "const", T_QUAL, 0, 0, CONST, 1, 0 },
{ "__const__", T_QUAL, 0, 0, CONST, 0, 0 },
{ "__const", T_QUAL, 0, 0, CONST, 0, 0 },
{ "continue", T_CONTINUE, 0, 0, 0, 0, 0 },
{ "default", T_DEFAULT, 0, 0, 0, 0, 0 },
{ "do", T_DO, 0, 0, 0, 0, 0 },
{ "double", T_TYPE, 0, DOUBLE, 0, 0, 0 },
{ "else", T_ELSE, 0, 0, 0, 0, 0 },
{ "enum", T_ENUM, 0, 0, 0, 0, 0 },
{ "extern", T_SCLASS, EXTERN, 0, 0, 0, 0 },
{ "float", T_TYPE, 0, FLOAT, 0, 0, 0 },
{ "for", T_FOR, 0, 0, 0, 0, 0 },
{ "goto", T_GOTO, 0, 0, 0, 0, 0 },
{ "if", T_IF, 0, 0, 0, 0, 0 },
{ "inline", T_SCLASS, INLINE, 0, 0, 0, 1 },
{ "__inline__", T_SCLASS, INLINE, 0, 0, 0, 0 },
{ "__inline", T_SCLASS, INLINE, 0, 0, 0, 0 },
{ "int", T_TYPE, 0, INT, 0, 0, 0 },
{ "long", T_TYPE, 0, LONG, 0, 0, 0 },
{ "register", T_SCLASS, REG, 0, 0, 0, 0 },
{ "return", T_RETURN, 0, 0, 0, 0, 0 },
{ "short", T_TYPE, 0, SHORT, 0, 0, 0 },
{ "signed", T_TYPE, 0, SIGNED, 0, 1, 0 },
{ "__signed__", T_TYPE, 0, SIGNED, 0, 0, 0 },
{ "__signed", T_TYPE, 0, SIGNED, 0, 0, 0 },
{ "sizeof", T_SIZEOF, 0, 0, 0, 0, 0 },
{ "static", T_SCLASS, STATIC, 0, 0, 0, 0 },
{ "struct", T_SOU, 0, STRUCT, 0, 0, 0 },
{ "switch", T_SWITCH, 0, 0, 0, 0, 0 },
{ "typedef", T_SCLASS, TYPEDEF, 0, 0, 0, 0 },
{ "union", T_SOU, 0, UNION, 0, 0, 0 },
{ "unsigned", T_TYPE, 0, UNSIGN, 0, 0, 0 },
{ "void", T_TYPE, 0, VOID, 0, 0, 0 },
{ "volatile", T_QUAL, 0, 0, VOLATILE, 1, 0 },
{ "__volatile__", T_QUAL, 0, 0, VOLATILE, 0, 0 },
{ "__volatile", T_QUAL, 0, 0, VOLATILE, 0, 0 },
{ "while", T_WHILE, 0, 0, 0, 0, 0 },
{ NULL, 0, 0, 0, 0, 0, 0 }
};
/* Symbol table */
static sym_t *symtab[HSHSIZ1];
/* bit i of the entry with index i is set */
u_quad_t qbmasks[sizeof(u_quad_t) * CHAR_BIT];
/* least significant i bits are set in the entry with index i */
u_quad_t qlmasks[sizeof(u_quad_t) * CHAR_BIT + 1];
/* least significant i bits are not set in the entry with index i */
u_quad_t qumasks[sizeof(u_quad_t) * CHAR_BIT + 1];
/* free list for sbuf structures */
static sbuf_t *sbfrlst;
/* Typ of next expected symbol */
symt_t symtyp;
/*
* All keywords are written to the symbol table. This saves us looking
* in a extra table for each name we found.
*/
void
initscan()
{
struct kwtab *kw;
sym_t *sym;
int h, i;
u_quad_t uq;
for (kw = kwtab; kw->kw_name != NULL; kw++) {
if (kw->kw_stdc && tflag)
continue;
if (kw->kw_gcc && !gflag)
continue;
sym = getblk(sizeof (sym_t));
sym->s_name = kw->kw_name;
sym->s_keyw = 1;
sym->s_value.v_quad = kw->kw_token;
if (kw->kw_token == T_TYPE || kw->kw_token == T_SOU) {
sym->s_tspec = kw->kw_tspec;
} else if (kw->kw_token == T_SCLASS) {
sym->s_scl = kw->kw_scl;
} else if (kw->kw_token == T_QUAL) {
sym->s_tqual = kw->kw_tqual;
}
h = hash(sym->s_name);
if ((sym->s_link = symtab[h]) != NULL)
symtab[h]->s_rlink = &sym->s_link;
(symtab[h] = sym)->s_rlink = &symtab[h];
}
/* initialize bit-masks for quads */
for (i = 0; i < sizeof (u_quad_t) * CHAR_BIT; i++) {
qbmasks[i] = (u_quad_t)1 << i;
uq = ~(u_quad_t)0 << i;
qumasks[i] = uq;
qlmasks[i] = ~uq;
}
qumasks[i] = 0;
qlmasks[i] = ~(u_quad_t)0;
}
/*
* Get a free sbuf structure, if possible from the free list
*/
static sbuf_t *
allocsb()
{
sbuf_t *sb;
if ((sb = sbfrlst) != NULL) {
sbfrlst = sb->sb_nxt;
} else {
sb = xmalloc(sizeof (sbuf_t));
}
(void)memset(sb, 0, sizeof (sb));
return (sb);
}
/*
* Put a sbuf structure to the free list
*/
static void
freesb(sb)
sbuf_t *sb;
{
sb->sb_nxt = sbfrlst;
sbfrlst = sb;
}
/*
* Read a character and ensure that it is positive (except EOF).
* Increment line count(s) if necessary.
*/
static int
inpc()
{
int c;
if ((c = input()) != EOF && (c &= CHAR_MASK) == '\n')
incline();
return (c);
}
static int
hash(s)
const char *s;
{
u_int v;
const u_char *us;
v = 0;
for (us = (const u_char *)s; *us != '\0'; us++) {
v = (v << sizeof (v)) + *us;
v ^= v >> (sizeof (v) * CHAR_BIT - sizeof (v));
}
return (v % HSHSIZ1);
}
/*
* Lex has found a letter followed by zero or more letters or digits.
* It looks for a symbol in the symbol table with the same name. This
* symbol must either be a keyword or a symbol of the type required by
* symtyp (label, member, tag, ...).
*
* If it is a keyword, the token is returned. In some cases it is described
* more deeply by data written to yylval.
*
* If it is a symbol, T_NAME is returned and the pointer to a sbuf struct
* is stored in yylval. This struct contains the name of the symbol, it's
* length and hash value. If there is already a symbol of the same name
* and type in the symbol table, the sbuf struct also contains a pointer
* to the symbol table entry.
*/
static int
name()
{
char *s;
sbuf_t *sb;
sym_t *sym;
int tok;
sb = allocsb();
sb->sb_name = yytext;
sb->sb_len = yyleng;
sb->sb_hash = hash(yytext);
if ((sym = search(sb)) != NULL && sym->s_keyw) {
freesb(sb);
return (keyw(sym));
}
sb->sb_sym = sym;
if (sym != NULL) {
if (blklev < sym->s_blklev)
lerror("name() 1");
sb->sb_name = sym->s_name;
sb->sb_len = strlen(sym->s_name);
tok = sym->s_scl == TYPEDEF ? T_TYPENAME : T_NAME;
} else {
s = getblk(yyleng + 1);
(void)memcpy(s, yytext, yyleng + 1);
sb->sb_name = s;
sb->sb_len = yyleng;
tok = T_NAME;
}
yylval.y_sb = sb;
return (tok);
}
static sym_t *
search(sb)
sbuf_t *sb;
{
sym_t *sym;
for (sym = symtab[sb->sb_hash]; sym != NULL; sym = sym->s_link) {
if (strcmp(sym->s_name, sb->sb_name) == 0) {
if (sym->s_keyw || sym->s_kind == symtyp)
return (sym);
}
}
return (NULL);
}
static int
keyw(sym)
sym_t *sym;
{
int t;
if ((t = (int)sym->s_value.v_quad) == T_SCLASS) {
yylval.y_scl = sym->s_scl;
} else if (t == T_TYPE || t == T_SOU) {
yylval.y_tspec = sym->s_tspec;
} else if (t == T_QUAL) {
yylval.y_tqual = sym->s_tqual;
}
return (t);
}
/*
* Convert a string representing an integer into internal representation.
* The value is returned in yylval. icon() (and yylex()) returns T_CON.
*/
static int
icon(base)
int base;
{
int l_suffix, u_suffix;
int len;
const char *cp;
char c, *eptr;
tspec_t typ;
u_long ul;
u_quad_t uq;
int ansiu;
static tspec_t contypes[2][3] = {
{ INT, LONG, QUAD },
{ UINT, ULONG, UQUAD }
};
cp = yytext;
len = yyleng;
/* skip 0x */
if (base == 16) {
cp += 2;
len -= 2;
}
/* read suffixes */
l_suffix = u_suffix = 0;
for ( ; ; ) {
if ((c = cp[len - 1]) == 'l' || c == 'L') {
l_suffix++;
} else if (c == 'u' || c == 'U') {
u_suffix++;
} else {
break;
}
len--;
}
if (l_suffix > 2 || u_suffix > 1) {
/* malformed integer constant */
warning(251);
if (l_suffix > 2)
l_suffix = 2;
if (u_suffix > 1)
u_suffix = 1;
}
if (tflag && u_suffix != 0) {
/* suffix U is illegal in traditional C */
warning(97);
}
typ = contypes[u_suffix][l_suffix];
errno = 0;
if (l_suffix < 2) {
ul = strtoul(cp, &eptr, base);
} else {
uq = strtouq(cp, &eptr, base);
}
if (eptr != cp + len)
lerror("icon() 1");
if (errno != 0)
/* integer constant out of range */
warning(252);
/*
* If the value is to big for the current type, we must choose
* another type.
*/
ansiu = 0;
switch (typ) {
case INT:
if (ul <= INT_MAX) {
/* ok */
} else if (ul <= (unsigned)UINT_MAX && base != 10) {
typ = UINT;
} else if (ul <= LONG_MAX) {
typ = LONG;
} else {
typ = ULONG;
}
if (typ == UINT || typ == ULONG) {
if (tflag) {
typ = LONG;
} else if (!sflag) {
/*
* Remember that the constant is unsigned
* only in ANSI C
*/
ansiu = 1;
}
}
break;
case UINT:
if (ul > (u_int)UINT_MAX)
typ = ULONG;
break;
case LONG:
if (ul > LONG_MAX && !tflag) {
typ = ULONG;
if (!sflag)
ansiu = 1;
}
break;
case QUAD:
if (uq > QUAD_MAX && !tflag) {
typ = UQUAD;
if (!sflag)
ansiu = 1;
}
break;
/* LINTED (enumeration values not handled in switch) */
}
if (typ != QUAD && typ != UQUAD) {
if (isutyp(typ)) {
uq = ul;
} else {
uq = (quad_t)(long)ul;
}
}
uq = (u_quad_t)xsign((quad_t)uq, typ, -1);
(yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ;
yylval.y_val->v_ansiu = ansiu;
yylval.y_val->v_quad = (quad_t)uq;
return (T_CON);
}
/*
* Returns 1 if t is a signed type and the value is negative.
*
* len is the number of significant bits. If len is -1, len is set
* to the width of type t.
*/
int
sign(q, t, len)
quad_t q;
tspec_t t;
int len;
{
if (t == PTR || isutyp(t))
return (0);
return (msb(q, t, len));
}
int
msb(q, t, len)
quad_t q;
tspec_t t;
int len;
{
if (len <= 0)
len = size(t);
return ((q & qbmasks[len - 1]) != 0);
}
/*
* Extends the sign of q.
*/
quad_t
xsign(q, t, len)
quad_t q;
tspec_t t;
int len;
{
if (len <= 0)
len = size(t);
if (t == PTR || isutyp(t) || !sign(q, t, len)) {
q &= qlmasks[len];
} else {
q |= qumasks[len];
}
return (q);
}
/*
* Convert a string representing a floating point value into its interal
* representation. Type and value are returned in yylval. fcon()
* (and yylex()) returns T_CON.
* XXX Currently it is not possible to convert constants of type
* long double which are greater then DBL_MAX.
*/
static int
fcon()
{
const char *cp;
int len;
tspec_t typ;
char c, *eptr;
double d;
float f;
cp = yytext;
len = yyleng;
if ((c = cp[len - 1]) == 'f' || c == 'F') {
typ = FLOAT;
len--;
} else if (c == 'l' || c == 'L') {
typ = LDOUBLE;
len--;
} else {
typ = DOUBLE;
}
if (tflag && typ != DOUBLE) {
/* suffixes F and L are illegal in traditional C */
warning(98);
}
errno = 0;
d = strtod(cp, &eptr);
if (eptr != cp + len)
lerror("fcon() 1");
if (errno != 0)
/* floating-point constant out of range */
warning(248);
if (typ == FLOAT) {
f = (float)d;
if (isinf(f)) {
/* floating-point constant out of range */
warning(248);
f = f > 0 ? FLT_MAX : -FLT_MAX;
}
}
(yylval.y_val = xcalloc(1, sizeof (val_t)))->v_tspec = typ;
if (typ == FLOAT) {
yylval.y_val->v_ldbl = f;
} else {
yylval.y_val->v_ldbl = d;
}
return (T_CON);
}
static int
operator(t, o)
int t;
op_t o;
{
yylval.y_op = o;
return (t);
}
/*
* Called if lex found a leading \'.
*/
static int
ccon()
{
int n, val, c;
char cv;
n = 0;
val = 0;
while ((c = getescc('\'')) >= 0) {
val = (val << CHAR_BIT) + c;
n++;
}
if (c == -2) {
/* unterminated character constant */
error(253);
} else {
if (n > sizeof (int) || (n > 1 && (pflag || hflag))) {
/* too many characters in character constant */
error(71);
} else if (n > 1) {
/* multi-character character constant */
warning(294);
} else if (n == 0) {
/* empty character constant */
error(73);
}
}
if (n == 1) {
cv = (char)val;
val = cv;
}
yylval.y_val = xcalloc(1, sizeof (val_t));
yylval.y_val->v_tspec = INT;
yylval.y_val->v_quad = val;
return (T_CON);
}
/*
* Called if lex found a leading L\'
*/
static int
wccon()
{
static char buf[MB_LEN_MAX + 1];
int i, c;
wchar_t wc;
i = 0;
while ((c = getescc('\'')) >= 0) {
if (i < MB_CUR_MAX)
buf[i] = (char)c;
i++;
}
wc = 0;
if (c == -2) {
/* unterminated character constant */
error(253);
} else if (c == 0) {
/* empty character constant */
error(73);
} else {
if (i > MB_CUR_MAX) {
i = MB_CUR_MAX;
/* too many characters in character constant */
error(71);
} else {
buf[i] = '\0';
(void)mbtowc(NULL, NULL, 0);
if (mbtowc(&wc, buf, MB_CUR_MAX) < 0)
/* invalid multibyte character */
error(291);
}
}
yylval.y_val = xcalloc(1, sizeof (val_t));
yylval.y_val->v_tspec = WCHAR;
yylval.y_val->v_quad = wc;
return (T_CON);
}
/*
* Read a character which is part of a character constant or of a string
* and handle escapes.
*
* The Argument is the character which delimits the character constant or
* string.
*
* Returns -1 if the end of the character constant or string is reached,
* -2 if the EOF is reached, and the charachter otherwise.
*/
static int
getescc(d)
int d;
{
static int pbc = -1;
int n, c, v;
if (pbc == -1) {
c = inpc();
} else {
c = pbc;
pbc = -1;
}
if (c == d)
return (-1);
switch (c) {
case '\n':
/* newline in string or char constant */
error(254);
return (-2);
case EOF:
return (-2);
case '\\':
switch (c = inpc()) {
case '"':
if (tflag && d == '\'')
/* \" inside character constant undef. ... */
warning(262);
return ('"');
case '\'':
return ('\'');
case '?':
if (tflag)
/* \? undefined in traditional C */
warning(263);
return ('?');
case '\\':
return ('\\');
case 'a':
if (tflag)
/* \a undefined in traditional C */
warning(81);
#ifdef __STDC__
return ('\a');
#else
return ('\007');
#endif
case 'b':
return ('\b');
case 'f':
return ('\f');
case 'n':
return ('\n');
case 'r':
return ('\r');
case 't':
return ('\t');
case 'v':
if (tflag)
/* \v undefined in traditional C */
warning(264);
#ifdef __STDC__
return ('\v');
#else
return ('\013');
#endif
case '8': case '9':
/* bad octal digit %c */
warning(77, c);
/* FALLTHROUGH */
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
n = 3;
v = 0;
do {
v = (v << 3) + (c - '0');
c = inpc();
} while (--n && isdigit(c) && (tflag || c <= '7'));
if (tflag && n > 0 && isdigit(c))
/* bad octal digit %c */
warning(77, c);
pbc = c;
if (v > UCHAR_MAX) {
/* character escape does not fit in char. */
warning(76);
v &= CHAR_MASK;
}
return (v);
case 'x':
if (tflag)
/* \x undefined in traditional C */
warning(82);
v = 0;
n = 0;
while ((c = inpc()) >= 0 && isxdigit(c)) {
c = isdigit(c) ?
c - '0' : toupper(c) - 'A' + 10;
v = (v << 4) + c;
if (n >= 0) {
if ((v & ~CHAR_MASK) != 0) {
/* overflow in hex escape */
warning(75);
n = -1;
} else {
n++;
}
}
}
pbc = c;
if (n == 0) {
/* no hex digits follow \x */
error(74);
} if (n == -1) {
v &= CHAR_MASK;
}
return (v);
case '\n':
return (getescc(d));
case EOF:
return (-2);
default:
if (isprint(c)) {
/* dubious escape \%c */
warning(79, c);
} else {
/* dubious escape \%o */
warning(80, c);
}
}
}
return (c);
}
/*
* Called for preprocessor directives. Currently implemented are:
* # lineno
* # lineno "filename"
*/
static void
directive()
{
const char *cp, *fn;
char c, *eptr;
size_t fnl;
long ln;
static int first = 1;
/* Go to first non-whitespace after # */
for (cp = yytext + 1; (c = *cp) == ' ' || c == '\t'; cp++) ;
if (!isdigit(c)) {
error:
/* undefined or invalid # directive */
warning(255);
return;
}
ln = strtol(--cp, &eptr, 10);
if (cp == eptr)
goto error;
if ((c = *(cp = eptr)) != ' ' && c != '\t' && c != '\0')
goto error;
while ((c = *cp++) == ' ' || c == '\t') ;
if (c != '\0') {
if (c != '"')
goto error;
fn = cp;
while ((c = *cp) != '"' && c != '\0')
cp++;
if (c != '"')
goto error;
if ((fnl = cp++ - fn) > PATH_MAX)
goto error;
while ((c = *cp++) == ' ' || c == '\t') ;
#if 0
if (c != '\0')
warning("extra character(s) after directive");
#endif
curr_pos.p_file = fnnalloc(fn, fnl);
/*
* If this is the first directive, the name is the name
* of the C source file as specified at the command line.
* It is written to the output file.
*/
if (first) {
csrc_pos.p_file = curr_pos.p_file;
outsrc(curr_pos.p_file);
first = 0;
}
}
curr_pos.p_line = (int)ln - 1;
if (curr_pos.p_file == csrc_pos.p_file)
csrc_pos.p_line = (int)ln - 1;
}
/*
* Handle lint comments. Following comments are currently understood:
* ARGSUSEDn
* CONSTCOND CONSTANTCOND CONSTANTCONDITION
* FALLTHRU FALLTHROUGH
* LINTLIBRARY
* LINTED NOSTRICT
* LONGLONG
* NOTREACHED
* PRINTFLIKEn
* PROTOLIB
* SCANFLIKEn
* VARARGSn
* If one of this comments is recognized, the arguments, if any, are
* parsed and a function which handles this comment is called.
*/
static void
comment()
{
int c, lc;
static struct {
const char *keywd;
int arg;
void (*func) __P((int));
} keywtab[] = {
{ "ARGSUSED", 1, argsused },
{ "CONSTCOND", 0, constcond },
{ "CONSTANTCOND", 0, constcond },
{ "CONSTANTCONDITION", 0, constcond },
{ "FALLTHRU", 0, fallthru },
{ "FALLTHROUGH", 0, fallthru },
{ "LINTLIBRARY", 0, lintlib },
{ "LINTED", 0, linted },
{ "LONGLONG", 0, longlong },
{ "NOSTRICT", 0, linted },
{ "NOTREACHED", 0, notreach },
{ "PRINTFLIKE", 1, printflike },
{ "PROTOLIB", 1, protolib },
{ "SCANFLIKE", 1, scanflike },
{ "VARARGS", 1, varargs },
};
char keywd[32];
char arg[32];
int l, i, a;
int eoc;
eoc = 0;
/* Skip white spaces after the start of the comment */
while ((c = inpc()) != EOF && isspace(c)) ;
/* Read the potential keyword to keywd */
l = 0;
while (c != EOF && isupper(c) && l < sizeof (keywd) - 1) {
keywd[l++] = (char)c;
c = inpc();
}
keywd[l] = '\0';
/* look for the keyword */
for (i = 0; i < sizeof (keywtab) / sizeof (keywtab[0]); i++) {
if (strcmp(keywtab[i].keywd, keywd) == 0)
break;
}
if (i == sizeof (keywtab) / sizeof (keywtab[0]))
goto skip_rest;
/* skip white spaces after the keyword */
while (c != EOF && isspace(c))
c = inpc();
/* read the argument, if the keyword accepts one and there is one */
l = 0;
if (keywtab[i].arg) {
while (c != EOF && isdigit(c) && l < sizeof (arg) - 1) {
arg[l++] = (char)c;
c = inpc();
}
}
arg[l] = '\0';
a = l != 0 ? atoi(arg) : -1;
/* skip white spaces after the argument */
while (c != EOF && isspace(c))
c = inpc();
if (c != '*' || (c = inpc()) != '/') {
if (keywtab[i].func != linted)
/* extra characters in lint comment */
warning(257);
} else {
/*
* remember that we have already found the end of the
* comment
*/
eoc = 1;
}
if (keywtab[i].func != NULL)
(*keywtab[i].func)(a);
skip_rest:
while (!eoc) {
lc = c;
if ((c = inpc()) == EOF) {
/* unterminated comment */
error(256);
break;
}
if (lc == '*' && c == '/')
eoc = 1;
}
}
/*
* Clear flags for lint comments LINTED, LONGLONG and CONSTCOND.
* clrwflgs() is called after function definitions and global and
* local declarations and definitions. It is also called between
* the controlling expression and the body of control statements
* (if, switch, for, while).
*/
void
clrwflgs()
{
nowarn = 0;
quadflg = 0;
ccflg = 0;
}
/*
* Strings are stored in a dynamically alloceted buffer and passed
* in yylval.y_xstrg to the parser. The parser or the routines called
* by the parser are responsible for freeing this buffer.
*/
static int
string()
{
u_char *s;
int c;
size_t len, max;
strg_t *strg;
s = xmalloc(max = 64);
len = 0;
while ((c = getescc('"')) >= 0) {
/* +1 to reserve space for a trailing NUL character */
if (len + 1 == max)
s = xrealloc(s, max *= 2);
s[len++] = (char)c;
}
s[len] = '\0';
if (c == -2)
/* unterminated string constant */
error(258);
strg = xcalloc(1, sizeof (strg_t));
strg->st_tspec = CHAR;
strg->st_len = len;
strg->st_cp = s;
yylval.y_strg = strg;
return (T_STRING);
}
static int
wcstrg()
{
char *s;
int c, i, n, wi;
size_t len, max, wlen;
wchar_t *ws;
strg_t *strg;
s = xmalloc(max = 64);
len = 0;
while ((c = getescc('"')) >= 0) {
/* +1 to save space for a trailing NUL character */
if (len + 1 >= max)
s = xrealloc(s, max *= 2);
s[len++] = (char)c;
}
s[len] = '\0';
if (c == -2)
/* unterminated string constant */
error(258);
/* get length of wide character string */
(void)mblen(NULL, 0);
for (i = 0, wlen = 0; i < len; i += n, wlen++) {
if ((n = mblen(&s[i], MB_CUR_MAX)) == -1) {
/* invalid multibyte character */
error(291);
break;
}
if (n == 0)
n = 1;
}
ws = xmalloc((wlen + 1) * sizeof (wchar_t));
/* convert from multibyte to wide char */
(void)mbtowc(NULL, NULL, 0);
for (i = 0, wi = 0; i < len; i += n, wi++) {
if ((n = mbtowc(&ws[wi], &s[i], MB_CUR_MAX)) == -1)
break;
if (n == 0)
n = 1;
}
ws[wi] = 0;
free(s);
strg = xcalloc(1, sizeof (strg_t));
strg->st_tspec = WCHAR;
strg->st_len = wlen;
strg->st_wcp = ws;
yylval.y_strg = strg;
return (T_STRING);
}
/*
* As noted above the scanner does not create new symbol table entries
* for symbols it cannot find in the symbol table. This is to avoid
* putting undeclared symbols into the symbol table if a syntax error
* occurs.
*
* getsym() is called as soon as it is probably ok to put the symbol to
* the symbol table. This does not mean that it is not possible that
* symbols are put to the symbol table which are than not completely
* declared due to syntax errors. To avoid too many problems in this
* case symbols get type int in getsym().
*
* XXX calls to getsym() should be delayed until decl1*() is called
*/
sym_t *
getsym(sb)
sbuf_t *sb;
{
dinfo_t *di;
char *s;
sym_t *sym;
sym = sb->sb_sym;
/*
* During member declaration it is possible that name() looked
* for symbols of type FVFT, although it should have looked for
* symbols of type FTAG. Same can happen for labels. Both cases
* are compensated here.
*/
if (symtyp == FMOS || symtyp == FLAB) {
if (sym == NULL || sym->s_kind == FVFT)
sym = search(sb);
}
if (sym != NULL) {
if (sym->s_kind != symtyp)
lerror("storesym() 1");
symtyp = FVFT;
freesb(sb);
return (sym);
}
/* create a new symbol table entry */
/* labels must always be allocated at level 1 (outhermost block) */
if (symtyp == FLAB) {
sym = getlblk(1, sizeof (sym_t));
s = getlblk(1, sb->sb_len + 1);
(void)memcpy(s, sb->sb_name, sb->sb_len + 1);
sym->s_name = s;
sym->s_blklev = 1;
di = dcs;
while (di->d_nxt != NULL && di->d_nxt->d_nxt != NULL)
di = di->d_nxt;
if (di->d_ctx != AUTO)
lerror("storesym() 2");
} else {
sym = getblk(sizeof (sym_t));
sym->s_name = sb->sb_name;
sym->s_blklev = blklev;
di = dcs;
}
STRUCT_ASSIGN(sym->s_dpos, curr_pos);
if ((sym->s_kind = symtyp) != FLAB)
sym->s_type = gettyp(INT);
symtyp = FVFT;
if ((sym->s_link = symtab[sb->sb_hash]) != NULL)
symtab[sb->sb_hash]->s_rlink = &sym->s_link;
(symtab[sb->sb_hash] = sym)->s_rlink = &symtab[sb->sb_hash];
*di->d_ldlsym = sym;
di->d_ldlsym = &sym->s_dlnxt;
freesb(sb);
return (sym);
}
/*
* Remove a symbol forever from the symbol table. s_blklev
* is set to -1 to avoid that the symbol will later be put
* back to the symbol table.
*/
void
rmsym(sym)
sym_t *sym;
{
if ((*sym->s_rlink = sym->s_link) != NULL)
sym->s_link->s_rlink = sym->s_rlink;
sym->s_blklev = -1;
sym->s_link = NULL;
}
/*
* Remove a list of symbols declared at one level from the symbol
* table.
*/
void
rmsyms(syms)
sym_t *syms;
{
sym_t *sym;
for (sym = syms; sym != NULL; sym = sym->s_dlnxt) {
if (sym->s_blklev != -1) {
if ((*sym->s_rlink = sym->s_link) != NULL)
sym->s_link->s_rlink = sym->s_rlink;
sym->s_link = NULL;
sym->s_rlink = NULL;
}
}
}
/*
* Put a symbol into the symbol table
*/
void
inssym(bl, sym)
int bl;
sym_t *sym;
{
int h;
h = hash(sym->s_name);
if ((sym->s_link = symtab[h]) != NULL)
symtab[h]->s_rlink = &sym->s_link;
(symtab[h] = sym)->s_rlink = &symtab[h];
sym->s_blklev = bl;
if (sym->s_link != NULL && sym->s_blklev < sym->s_link->s_blklev)
lerror("inssym()");
}
/*
* Called at level 0 after syntax errors
* Removes all symbols which are not declared at level 0 from the
* symbol table. Also frees all memory which is not associated with
* level 0.
*/
void
cleanup()
{
sym_t *sym, *nsym;
int i;
for (i = 0; i < HSHSIZ1; i++) {
for (sym = symtab[i]; sym != NULL; sym = nsym) {
nsym = sym->s_link;
if (sym->s_blklev >= 1) {
if ((*sym->s_rlink = nsym) != NULL)
nsym->s_rlink = sym->s_rlink;
}
}
}
for (i = mblklev; i > 0; i--)
freelblk(i);
}
/*
* Create a new symbol with the name of an existing symbol.
*/
sym_t *
pushdown(sym)
sym_t *sym;
{
int h;
sym_t *nsym;
h = hash(sym->s_name);
nsym = getblk(sizeof (sym_t));
if (sym->s_blklev > blklev)
lerror("pushdown()");
nsym->s_name = sym->s_name;
STRUCT_ASSIGN(nsym->s_dpos, curr_pos);
nsym->s_kind = sym->s_kind;
nsym->s_blklev = blklev;
if ((nsym->s_link = symtab[h]) != NULL)
symtab[h]->s_rlink = &nsym->s_link;
(symtab[h] = nsym)->s_rlink = &symtab[h];
*dcs->d_ldlsym = nsym;
dcs->d_ldlsym = &nsym->s_dlnxt;
return (nsym);
}
/*
* Free any dynamically allocated memory referenced by
* the value stack or yylval.
* The type of information in yylval is described by tok.
*/
void
freeyyv(sp, tok)
void *sp;
int tok;
{
if (tok == T_NAME || tok == T_TYPENAME) {
sbuf_t *sb = *(sbuf_t **)sp;
freesb(sb);
} else if (tok == T_CON) {
val_t *val = *(val_t **)sp;
free(val);
} else if (tok == T_STRING) {
strg_t *strg = *(strg_t **)sp;
if (strg->st_tspec == CHAR) {
free(strg->st_cp);
} else if (strg->st_tspec == WCHAR) {
free(strg->st_wcp);
} else {
lerror("fryylv() 1");
}
free(strg);
}
}

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