window/parser2.c

   1 /*      $NetBSD: parser2.c,v 1.5 1998/08/25 20:59:42 ross Exp $ */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)parser2.c   8.1 (Berkeley) 6/6/93";
  43 #else
  44 __RCSID("$NetBSD: parser2.c,v 1.5 1998/08/25 20:59:42 ross Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #define EXTERN
  49 #include "ww.h"
  50 #include "defs.h"
  51 #include "alias.h"
  52 #undef  EXTERN
  53 #include "parser.h"
  54 #include "var.h"
  55 #include "lcmd.h"
  56
  57 /*
  58  * name == 0 means we don't have a function name but
  59  * want to parse the arguments anyway.  flag == 0 in this case.
  60  */
  61 int
  62 p_function(name, v, flag)
  63         char *name;
  64         struct value *v;
  65         int flag;
  66 {
  67         struct value t;
  68         struct lcmd_tab *c = 0;
  69         struct alias *a = 0;
  70         struct lcmd_arg *ap;                    /* this arg */
  71         struct lcmd_arg *lp = 0;                /* list arg */
  72         int i;
  73         struct value av[LCMD_NARG + 1];
  74         struct value *vp;
  75
  76         if (name != 0) {
  77                 if ((c = lcmd_lookup(name)))
  78                         name = c->lc_name;
  79                 else if ((a = alias_lookup(name)))
  80                         name = a->a_name;
  81                 else {
  82                         p_error("%s: No such command or alias.", name);
  83                         flag = 0;
  84                 }
  85         }
  86         for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
  87                 vp->v_type = V_ERR;
  88
  89         if (token == T_LP)
  90                 (void) s_gettok();
  91         i = 0;
  92         for (;;) {
  93                 ap = 0;
  94                 vp = 0;
  95                 if (token == T_COMMA)           /* null argument */
  96                         t.v_type = V_ERR;
  97                 else {
  98                         if (p_expr0(&t, flag) < 0)
  99                                 break;
 100                         if (t.v_type == V_ERR)
 101                                 flag = 0;
 102                 }
 103                 if (token != T_ASSIGN) {
 104                         if (i >= LCMD_NARG ||
 105                             (c != 0 && (ap = lp) == 0 &&
 106                             (ap = c->lc_arg + i)->arg_name == 0)) {
 107                                 p_error("%s: Too many arguments.", name);
 108                                 flag = 0;
 109                         } else
 110                                 vp = &av[i++];
 111                 } else {
 112                         char *tmp;
 113                         if (p_convstr(&t) < 0)
 114                                 goto abort;
 115                         tmp = t.v_type == V_STR ? t.v_str : 0;
 116                         (void) s_gettok();
 117                         if (p_expr(&t, flag) < 0) {
 118                                 if (tmp)
 119                                         str_free(tmp);
 120                                 p_synerror();
 121                                 goto abort;
 122                         }
 123                         if (t.v_type == V_ERR)
 124                                 flag = 0;
 125                         if (tmp) {
 126                                 if (c == 0) {
 127                                         /* an aliase */
 128                                         p_error("%s: Bad alias syntax.", name);
 129                                         flag = 0;
 130                                 } else {
 131                                         for (ap = c->lc_arg, vp = av;
 132                                              ap != 0 && ap->arg_name != 0 &&
 133                                              (*ap->arg_name == '\0' ||
 134                                               !str_match(tmp, ap->arg_name,
 135                                                         ap->arg_minlen));
 136                                              ap++, vp++)
 137                                                 ;
 138                                         if (ap == 0 || ap->arg_name == 0) {
 139                                                 p_error("%s: Unknown argument \"%s\".",
 140                                                         name, tmp);
 141                                                 flag = 0;
 142                                                 ap = 0;
 143                                                 vp = 0;
 144                                         }
 145                                 }
 146                                 str_free(tmp);
 147                         }
 148                 }
 149                 if (ap != 0) {
 150                         if (ap->arg_flags & ARG_LIST) {
 151                                 i = vp - av + 1;
 152                                 lp = ap;
 153                         }
 154                         if (vp->v_type != V_ERR) {
 155                                 if (*ap->arg_name)
 156                                         p_error("%s: Argument %d (%s) duplicated.",
 157                                                 name, vp - av + 1,
 158                                                 ap->arg_name);
 159                                 else
 160                                         p_error("%s: Argument %d duplicated.",
 161                                                 name, vp - av + 1);
 162                                 flag = 0;
 163                                 vp = 0;
 164                         } else if (t.v_type == V_ERR) {
 165                                 /* do nothing */
 166                         } else if (((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
 167                                     t.v_type != V_NUM) ||
 168                                    ((ap->arg_flags&ARG_TYPE) == ARG_STR &&
 169                                    t.v_type != V_STR)) {
 170                                 if (*ap->arg_name)
 171                                         p_error("%s: Argument %d (%s) type mismatch.",
 172                                                 name, vp - av + 1,
 173                                                 ap->arg_name);
 174                                 else
 175                                         p_error("%s: Argument %d type mismatch.",
 176                                                 name, vp - av + 1);
 177                                 flag = 0;
 178                                 vp = 0;
 179                         }
 180                 }
 181                 if (vp != 0)
 182                         *vp = t;
 183                 else
 184                         val_free(t);
 185                 if (token == T_COMMA)
 186                         (void) s_gettok();
 187         }
 188
 189         if (p_erred())
 190                 flag = 0;
 191         if (token == T_RP)
 192                 (void) s_gettok();
 193         else if (token != T_EOL && token != T_EOF)
 194                 flag = 0;               /* look for legal follow set */
 195         v->v_type = V_ERR;
 196         if (flag) {
 197                 if (c != 0)
 198                         (*c->lc_func)(v, av);
 199                 else {
 200                         if (a->a_flags & A_INUSE)
 201                                 p_error("%s: Recursive alias.", a->a_name);
 202                         else {
 203                                 a->a_flags |= A_INUSE;
 204                                 if (dolongcmd(a->a_buf, av, i) < 0)
 205                                         p_memerror();
 206                                 a->a_flags &= ~A_INUSE;
 207                         }
 208                 }
 209         }
 210         if (p_abort()) {
 211                 val_free(*v);
 212                 v->v_type = V_ERR;
 213                 goto abort;
 214         }
 215         for (vp = av; vp < &av[LCMD_NARG]; vp++)
 216                 val_free(*vp);
 217         return 0;
 218 abort:
 219         for (vp = av; vp < &av[LCMD_NARG]; vp++)
 220                 val_free(*vp);
 221         return -1;
 222 }
 223
 224 int
 225 p_assign(name, v, flag)
 226         char *name;
 227         struct value *v;
 228         char flag;
 229 {
 230         (void) s_gettok();
 231
 232         if (p_expr(v, flag) < 0) {
 233                 p_synerror();
 234                 return -1;
 235         }
 236         switch (v->v_type) {
 237         case V_STR:
 238         case V_NUM:
 239                 if (flag && var_set(name, v) == 0) {
 240                         p_memerror();
 241                         val_free(*v);
 242                         return -1;
 243                 }
 244                 break;
 245         }
 246         return 0;
 247 }