[dragonfly.git] / usr.bin / window / parser2.c

/*	@(#)parser2.c	8.1 (Berkeley) 6/6/93	*/
/*	$NetBSD: parser2.c,v 1.11 2009/04/14 08:50:06 lukem Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The 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. 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.
 */

#define EXTERN
#include "ww.h"
#include "defs.h"
#include "alias.h"
#undef  EXTERN
#include "parser.h"
#include "var.h"
#include "lcmd.h"

/*
 * name == 0 means we don't have a function name but
 * want to parse the arguments anyway.  flag == 0 in this case.
 */
int
p_function(const char *name, struct value *v, int flag)
{
	struct value t;
	struct lcmd_tab *c = 0;
	struct alias *a = 0;
	struct lcmd_arg *ap;			/* this arg */
	struct lcmd_arg *lp = 0;		/* list arg */
	int i;
	struct value av[LCMD_NARG + 1];
	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 && vp->v_type != V_ERR) {
				if (*ap->arg_name)
					p_error("%s: Argument %d (%s) duplicated.",
						name, (int)(vp - av + 1),
						ap->arg_name);
				else
					p_error("%s: Argument %d duplicated.",
						name, (int)(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, (int)(vp - av + 1),
						ap->arg_name);
				else
					p_error("%s: Argument %d type mismatch.",
						name, (int)(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;
}

int
p_assign(const char *name, struct value *v, int 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 (name && flag && var_set(name, v) == 0) {
			p_memerror();
			val_free(*v);
			return -1;
		}
		break;
	}
	return 0;
}
Commit	Line	Data
2c872e05	1	/* @(#)parser2.c 8.1 (Berkeley) 6/6/93 */
abecab39 SW	2	/* $NetBSD: parser2.c,v 1.11 2009/04/14 08:50:06 lukem Exp $ */
abecab39 SW	3
984263bc MD	4	/*
	5	* Copyright (c) 1983, 1993
	6	* The Regents of the University of California. All rights reserved.
	7	*
	8	* This code is derived from software contributed to Berkeley by
	9	* Edward Wang at The University of California, Berkeley.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions and the following disclaimer.
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in the
	18	* documentation and/or other materials provided with the distribution.
abecab39	19	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
abecab39 SW	36	#define EXTERN
	37	#include "ww.h"
	38	#include "defs.h"
	39	#include "alias.h"
	40	#undef EXTERN
984263bc MD	41	#include "parser.h"
	42	#include "var.h"
	43	#include "lcmd.h"
984263bc MD	44
	45	/*
	46	* name == 0 means we don't have a function name but
	47	* want to parse the arguments anyway. flag == 0 in this case.
	48	*/
abecab39 SW	49	int
abecab39 SW	50	p_function(const char name, struct value v, int flag)
984263bc MD	51	{
984263bc MD	52	struct value t;
abecab39 SW	53	struct lcmd_tab *c = 0;
	54	struct alias *a = 0;
	55	struct lcmd_arg ap; / this arg */
984263bc	56	struct lcmd_arg lp = 0; / list arg */
abecab39	57	int i;
984263bc	58	struct value av[LCMD_NARG + 1];
abecab39	59	struct value *vp;
984263bc	60
abecab39 SW	61	if (name != 0) {
abecab39 SW	62	if ((c = lcmd_lookup(name)))
984263bc	63	name = c->lc_name;
abecab39	64	else if ((a = alias_lookup(name)))
984263bc MD	65	name = a->a_name;
	66	else {
	67	p_error("%s: No such command or alias.", name);
	68	flag = 0;
	69	}
abecab39	70	}
984263bc MD	71	for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
	72	vp->v_type = V_ERR;
	73
	74	if (token == T_LP)
	75	(void) s_gettok();
	76	i = 0;
	77	for (;;) {
	78	ap = 0;
	79	vp = 0;
	80	if (token == T_COMMA) /* null argument */
	81	t.v_type = V_ERR;
	82	else {
	83	if (p_expr0(&t, flag) < 0)
	84	break;
	85	if (t.v_type == V_ERR)
	86	flag = 0;
	87	}
	88	if (token != T_ASSIGN) {
	89	if (i >= LCMD_NARG \|\|
abecab39 SW	90	(c != 0 && (ap = lp) == 0 &&
abecab39 SW	91	(ap = c->lc_arg + i)->arg_name == 0)) {
984263bc MD	92	p_error("%s: Too many arguments.", name);
	93	flag = 0;
	94	} else
	95	vp = &av[i++];
	96	} else {
	97	char *tmp;
	98	if (p_convstr(&t) < 0)
	99	goto abort;
	100	tmp = t.v_type == V_STR ? t.v_str : 0;
	101	(void) s_gettok();
	102	if (p_expr(&t, flag) < 0) {
	103	if (tmp)
	104	str_free(tmp);
	105	p_synerror();
	106	goto abort;
	107	}
	108	if (t.v_type == V_ERR)
	109	flag = 0;
	110	if (tmp) {
	111	if (c == 0) {
	112	/* an aliase */
	113	p_error("%s: Bad alias syntax.", name);
	114	flag = 0;
	115	} else {
	116	for (ap = c->lc_arg, vp = av;
	117	ap != 0 && ap->arg_name != 0 &&
	118	(*ap->arg_name == '\0' \|\|
	119	!str_match(tmp, ap->arg_name,
	120	ap->arg_minlen));
	121	ap++, vp++)
	122	;
	123	if (ap == 0 \|\| ap->arg_name == 0) {
	124	p_error("%s: Unknown argument \"%s\".",
	125	name, tmp);
	126	flag = 0;
	127	ap = 0;
	128	vp = 0;
	129	}
	130	}
	131	str_free(tmp);
	132	}
	133	}
	134	if (ap != 0) {
	135	if (ap->arg_flags & ARG_LIST) {
	136	i = vp - av + 1;
	137	lp = ap;
	138	}
abecab39	139	if (vp && vp->v_type != V_ERR) {
984263bc MD	140	if (*ap->arg_name)
984263bc MD	141	p_error("%s: Argument %d (%s) duplicated.",
abecab39	142	name, (int)(vp - av + 1),
984263bc MD	143	ap->arg_name);
	144	else
	145	p_error("%s: Argument %d duplicated.",
abecab39	146	name, (int)(vp - av + 1));
984263bc MD	147	flag = 0;
	148	vp = 0;
	149	} else if (t.v_type == V_ERR) {
	150	/* do nothing */
abecab39 SW	151	} else if (((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
	152	t.v_type != V_NUM) \|\|
	153	((ap->arg_flags&ARG_TYPE) == ARG_STR &&
	154	t.v_type != V_STR)) {
984263bc MD	155	if (*ap->arg_name)
984263bc MD	156	p_error("%s: Argument %d (%s) type mismatch.",
abecab39	157	name, (int)(vp - av + 1),
984263bc MD	158	ap->arg_name);
	159	else
	160	p_error("%s: Argument %d type mismatch.",
abecab39	161	name, (int)(vp - av + 1));
984263bc MD	162	flag = 0;
	163	vp = 0;
	164	}
	165	}
	166	if (vp != 0)
	167	*vp = t;
	168	else
	169	val_free(t);
	170	if (token == T_COMMA)
	171	(void) s_gettok();
	172	}
	173
	174	if (p_erred())
	175	flag = 0;
	176	if (token == T_RP)
	177	(void) s_gettok();
	178	else if (token != T_EOL && token != T_EOF)
	179	flag = 0; /* look for legal follow set */
	180	v->v_type = V_ERR;
abecab39	181	if (flag) {
984263bc MD	182	if (c != 0)
984263bc MD	183	(*c->lc_func)(v, av);
abecab39	184	else {
984263bc MD	185	if (a->a_flags & A_INUSE)
	186	p_error("%s: Recursive alias.", a->a_name);
	187	else {
	188	a->a_flags \|= A_INUSE;
	189	if (dolongcmd(a->a_buf, av, i) < 0)
	190	p_memerror();
	191	a->a_flags &= ~A_INUSE;
	192	}
abecab39 SW	193	}
abecab39 SW	194	}
984263bc MD	195	if (p_abort()) {
	196	val_free(*v);
	197	v->v_type = V_ERR;
	198	goto abort;
	199	}
	200	for (vp = av; vp < &av[LCMD_NARG]; vp++)
	201	val_free(*vp);
	202	return 0;
	203	abort:
	204	for (vp = av; vp < &av[LCMD_NARG]; vp++)
	205	val_free(*vp);
	206	return -1;
	207	}
	208
abecab39 SW	209	int
abecab39 SW	210	p_assign(const char name, struct value v, int flag)
984263bc MD	211	{
	212	(void) s_gettok();
	213
	214	if (p_expr(v, flag) < 0) {
	215	p_synerror();
	216	return -1;
	217	}
	218	switch (v->v_type) {
	219	case V_STR:
	220	case V_NUM:
abecab39	221	if (name && flag && var_set(name, v) == 0) {
984263bc MD	222	p_memerror();
	223	val_free(*v);
	224	return -1;
	225	}
	226	break;
	227	}
	228	return 0;
	229	}