1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)parser2.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/parser2.c,v 1.1.1.1.14.1 2001/05/17 09:45:00 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/parser2.c,v 1.2 2003/06/17 04:29:34 dillon Exp $ 39 */ 40 41 #include "parser.h" 42 #include "var.h" 43 #include "lcmd.h" 44 #include "alias.h" 45 46 /* 47 * name == 0 means we don't have a function name but 48 * want to parse the arguments anyway. flag == 0 in this case. 49 */ 50 p_function(name, v, flag) 51 char *name; 52 register struct value *v; 53 { 54 struct value t; 55 register struct lcmd_tab *c = 0; 56 register struct alias *a = 0; 57 register struct lcmd_arg *ap; /* this arg */ 58 struct lcmd_arg *lp = 0; /* list arg */ 59 register i; 60 struct value av[LCMD_NARG + 1]; 61 register struct value *vp; 62 63 if (name != 0) 64 if (c = lcmd_lookup(name)) 65 name = c->lc_name; 66 else if (a = alias_lookup(name)) 67 name = a->a_name; 68 else { 69 p_error("%s: No such command or alias.", name); 70 flag = 0; 71 } 72 73 for (vp = av; vp < &av[LCMD_NARG + 1]; vp++) 74 vp->v_type = V_ERR; 75 76 if (token == T_LP) 77 (void) s_gettok(); 78 i = 0; 79 for (;;) { 80 ap = 0; 81 vp = 0; 82 if (token == T_COMMA) /* null argument */ 83 t.v_type = V_ERR; 84 else { 85 if (p_expr0(&t, flag) < 0) 86 break; 87 if (t.v_type == V_ERR) 88 flag = 0; 89 } 90 if (token != T_ASSIGN) { 91 if (i >= LCMD_NARG || 92 c != 0 && (ap = lp) == 0 && 93 (ap = c->lc_arg + i)->arg_name == 0) { 94 p_error("%s: Too many arguments.", name); 95 flag = 0; 96 } else 97 vp = &av[i++]; 98 } else { 99 char *tmp; 100 if (p_convstr(&t) < 0) 101 goto abort; 102 tmp = t.v_type == V_STR ? t.v_str : 0; 103 (void) s_gettok(); 104 if (p_expr(&t, flag) < 0) { 105 if (tmp) 106 str_free(tmp); 107 p_synerror(); 108 goto abort; 109 } 110 if (t.v_type == V_ERR) 111 flag = 0; 112 if (tmp) { 113 if (c == 0) { 114 /* an aliase */ 115 p_error("%s: Bad alias syntax.", name); 116 flag = 0; 117 } else { 118 for (ap = c->lc_arg, vp = av; 119 ap != 0 && ap->arg_name != 0 && 120 (*ap->arg_name == '\0' || 121 !str_match(tmp, ap->arg_name, 122 ap->arg_minlen)); 123 ap++, vp++) 124 ; 125 if (ap == 0 || ap->arg_name == 0) { 126 p_error("%s: Unknown argument \"%s\".", 127 name, tmp); 128 flag = 0; 129 ap = 0; 130 vp = 0; 131 } 132 } 133 str_free(tmp); 134 } 135 } 136 if (ap != 0) { 137 if (ap->arg_flags & ARG_LIST) { 138 i = vp - av + 1; 139 lp = ap; 140 } 141 if (vp->v_type != V_ERR) { 142 if (*ap->arg_name) 143 p_error("%s: Argument %d (%s) duplicated.", 144 name, vp - av + 1, 145 ap->arg_name); 146 else 147 p_error("%s: Argument %d duplicated.", 148 name, vp - av + 1); 149 flag = 0; 150 vp = 0; 151 } else if (t.v_type == V_ERR) { 152 /* do nothing */ 153 } else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM && 154 t.v_type != V_NUM || 155 (ap->arg_flags&ARG_TYPE) == ARG_STR && 156 t.v_type != V_STR) { 157 if (*ap->arg_name) 158 p_error("%s: Argument %d (%s) type mismatch.", 159 name, vp - av + 1, 160 ap->arg_name); 161 else 162 p_error("%s: Argument %d type mismatch.", 163 name, vp - av + 1); 164 flag = 0; 165 vp = 0; 166 } 167 } 168 if (vp != 0) 169 *vp = t; 170 else 171 val_free(t); 172 if (token == T_COMMA) 173 (void) s_gettok(); 174 } 175 176 if (p_erred()) 177 flag = 0; 178 if (token == T_RP) 179 (void) s_gettok(); 180 else if (token != T_EOL && token != T_EOF) 181 flag = 0; /* look for legal follow set */ 182 v->v_type = V_ERR; 183 if (flag) 184 if (c != 0) 185 (*c->lc_func)(v, av); 186 else 187 if (a->a_flags & A_INUSE) 188 p_error("%s: Recursive alias.", a->a_name); 189 else { 190 a->a_flags |= A_INUSE; 191 if (dolongcmd(a->a_buf, av, i) < 0) 192 p_memerror(); 193 a->a_flags &= ~A_INUSE; 194 } 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 } 208 209 p_assign(name, v, flag) 210 char *name; 211 struct value *v; 212 char flag; 213 { 214 (void) s_gettok(); 215 216 if (p_expr(v, flag) < 0) { 217 p_synerror(); 218 return -1; 219 } 220 switch (v->v_type) { 221 case V_STR: 222 case V_NUM: 223 if (flag && var_set(name, v) == 0) { 224 p_memerror(); 225 val_free(*v); 226 return -1; 227 } 228 break; 229 } 230 return 0; 231 } 232