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BSD 4_3_Net_2 release
[unix-history] / usr / src / usr.bin / window / parser2.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 sccsid[] = "@(#)parser2.c 3.14 (Berkeley) 6/6/90";
#endif /* not lint */
#include "parser.h"
#include "var.h"
#include "lcmd.h"
#include "alias.h"
/*
* name == 0 means we don't have a function name but
* want to parse the arguments anyway. flag == 0 in this case.
*/
p_function(name, v, flag)
char *name;
register struct value *v;
{
struct value t;
register struct lcmd_tab *c = 0;
register struct alias *a = 0;
register struct lcmd_arg *ap; /* this arg */
struct lcmd_arg *lp = 0; /* list arg */
register i;
struct value av[LCMD_NARG + 1];
register struct value *vp;
if (name != 0)
if (c = lcmd_lookup(name))
name = c->lc_name;
else if (a = alias_lookup(name))
name = a->a_name;
else {
p_error("%s: No such command or alias.", name);
flag = 0;
}
for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
vp->v_type = V_ERR;
if (token == T_LP)
(void) s_gettok();
i = 0;
for (;;) {
ap = 0;
vp = 0;
if (token == T_COMMA) /* null argument */
t.v_type = V_ERR;
else {
if (p_expr0(&t, flag) < 0)
break;
if (t.v_type == V_ERR)
flag = 0;
}
if (token != T_ASSIGN) {
if (i >= LCMD_NARG ||
c != 0 && (ap = lp) == 0 &&
(ap = c->lc_arg + i)->arg_name == 0) {
p_error("%s: Too many arguments.", name);
flag = 0;
} else
vp = &av[i++];
} else {
char *tmp;
if (p_convstr(&t) < 0)
goto abort;
tmp = t.v_type == V_STR ? t.v_str : 0;
(void) s_gettok();
if (p_expr(&t, flag) < 0) {
if (tmp)
str_free(tmp);
p_synerror();
goto abort;
}
if (t.v_type == V_ERR)
flag = 0;
if (tmp) {
if (c == 0) {
/* an aliase */
p_error("%s: Bad alias syntax.", name);
flag = 0;
} else {
for (ap = c->lc_arg, vp = av;
ap != 0 && ap->arg_name != 0 &&
(*ap->arg_name == '\0' ||
!str_match(tmp, ap->arg_name,
ap->arg_minlen));
ap++, vp++)
;
if (ap == 0 || ap->arg_name == 0) {
p_error("%s: Unknown argument \"%s\".",
name, tmp);
flag = 0;
ap = 0;
vp = 0;
}
}
str_free(tmp);
}
}
if (ap != 0) {
if (ap->arg_flags & ARG_LIST) {
i = vp - av + 1;
lp = ap;
}
if (vp->v_type != V_ERR) {
if (*ap->arg_name)
p_error("%s: Argument %d (%s) duplicated.",
name, vp - av + 1,
ap->arg_name);
else
p_error("%s: Argument %d duplicated.",
name, vp - av + 1);
flag = 0;
vp = 0;
} else if (t.v_type == V_ERR) {
/* do nothing */
} else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
t.v_type != V_NUM ||
(ap->arg_flags&ARG_TYPE) == ARG_STR &&
t.v_type != V_STR) {
if (*ap->arg_name)
p_error("%s: Argument %d (%s) type mismatch.",
name, vp - av + 1,
ap->arg_name);
else
p_error("%s: Argument %d type mismatch.",
name, vp - av + 1);
flag = 0;
vp = 0;
}
}
if (vp != 0)
*vp = t;
else
val_free(t);
if (token == T_COMMA)
(void) s_gettok();
}
if (p_erred())
flag = 0;
if (token == T_RP)
(void) s_gettok();
else if (token != T_EOL && token != T_EOF)
flag = 0; /* look for legal follow set */
v->v_type = V_ERR;
if (flag)
if (c != 0)
(*c->lc_func)(v, av);
else
if (a->a_flags & A_INUSE)
p_error("%s: Recursive alias.", a->a_name);
else {
a->a_flags |= A_INUSE;
if (dolongcmd(a->a_buf, av, i) < 0)
p_memerror();
a->a_flags &= ~A_INUSE;
}
if (p_abort()) {
val_free(*v);
v->v_type = V_ERR;
goto abort;
}
for (vp = av; vp < &av[LCMD_NARG]; vp++)
val_free(*vp);
return 0;
abort:
for (vp = av; vp < &av[LCMD_NARG]; vp++)
val_free(*vp);
return -1;
}
p_assign(name, v, flag)
char *name;
struct value *v;
char flag;
{
(void) s_gettok();
if (p_expr(v, flag) < 0) {
p_synerror();
return -1;
}
switch (v->v_type) {
case V_STR:
case V_NUM:
if (flag && var_set(name, v) == 0) {
p_memerror();
val_free(*v);
return -1;
}
break;
}
return 0;
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.