1 /* $NetBSD: parse.c,v 1.11 1999/07/02 15:21:26 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 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 * Christos Zoulas of Cornell University. 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 #if !defined(lint) && !defined(SCCSID) 41 #if 0 42 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; 43 #else 44 __RCSID("$NetBSD: parse.c,v 1.11 1999/07/02 15:21:26 simonb Exp $"); 45 #endif 46 #endif /* not lint && not SCCSID */ 47 48 /* 49 * parse.c: parse an editline extended command 50 * 51 * commands are: 52 * 53 * bind 54 * echotc 55 * edit 56 * gettc 57 * history 58 * settc 59 * setty 60 */ 61 #include "sys.h" 62 #include "el.h" 63 #include "tokenizer.h" 64 65 private struct { 66 char *name; 67 int (*func) __P((EditLine *, int, char **)); 68 } cmds[] = { 69 { "bind", map_bind }, 70 { "echotc", term_echotc }, 71 { "edit", el_editmode }, 72 { "history", hist_list }, 73 { "telltc", term_telltc }, 74 { "settc", term_settc }, 75 { "setty", tty_stty }, 76 { NULL, NULL } 77 }; 78 79 80 /* parse_line(): 81 * Parse a line and dispatch it 82 */ 83 protected int 84 parse_line(el, line) 85 EditLine *el; 86 const char *line; 87 { 88 char **argv; 89 int argc; 90 Tokenizer *tok; 91 92 tok = tok_init(NULL); 93 tok_line(tok, line, &argc, &argv); 94 argc = el_parse(el, argc, argv); 95 tok_end(tok); 96 return argc; 97 } 98 99 /* el_parse(): 100 * Command dispatcher 101 */ 102 public int 103 el_parse(el, argc, argv) 104 EditLine *el; 105 int argc; 106 char *argv[]; 107 { 108 char *ptr; 109 int i; 110 111 if (argc < 1) 112 return -1; 113 ptr = strchr(argv[0], ':'); 114 if (ptr != NULL) { 115 char *tprog; 116 size_t l; 117 118 if (ptr == argv[0]) 119 return 0; 120 l = ptr - argv[0] - 1; 121 tprog = (char *)el_malloc(l + 1); 122 if (tprog == NULL) 123 return 0; 124 (void)strncpy(tprog, argv[0], l); 125 tprog[l] = '\0'; 126 ptr++; 127 l = el_match(el->el_prog, tprog); 128 el_free(tprog); 129 if (!l) 130 return 0; 131 } 132 else 133 ptr = argv[0]; 134 135 for (i = 0; cmds[i].name != NULL; i++) 136 if (strcmp(cmds[i].name, ptr) == 0) { 137 i = (*cmds[i].func)(el, argc, argv); 138 return -i; 139 } 140 141 return -1; 142 } 143 144 145 /* parse__escape(): 146 * Parse a string of the form ^<char> \<odigit> \<char> and return 147 * the appropriate character or -1 if the escape is not valid 148 */ 149 protected int 150 parse__escape(ptr) 151 const char ** const ptr; 152 { 153 const char *p; 154 int c; 155 156 p = *ptr; 157 158 if (p[1] == 0) 159 return -1; 160 161 if (*p == '\\') { 162 p++; 163 switch (*p) { 164 case 'a': 165 c = '\007'; /* Bell */ 166 break; 167 case 'b': 168 c = '\010'; /* Backspace */ 169 break; 170 case 't': 171 c = '\011'; /* Horizontal Tab */ 172 break; 173 case 'n': 174 c = '\012'; /* New Line */ 175 break; 176 case 'v': 177 c = '\013'; /* Vertical Tab */ 178 break; 179 case 'f': 180 c = '\014'; /* Form Feed */ 181 break; 182 case 'r': 183 c = '\015'; /* Carriage Return */ 184 break; 185 case 'e': 186 c = '\033'; /* Escape */ 187 break; 188 case '0': 189 case '1': 190 case '2': 191 case '3': 192 case '4': 193 case '5': 194 case '6': 195 case '7': 196 { 197 int cnt, ch; 198 199 for (cnt = 0, c = 0; cnt < 3; cnt++) { 200 ch = *p++; 201 if (ch < '0' || ch > '7') { 202 p--; 203 break; 204 } 205 c = (c << 3) | (ch - '0'); 206 } 207 if ((c & 0xffffff00) != 0) 208 return -1; 209 --p; 210 } 211 break; 212 default: 213 c = *p; 214 break; 215 } 216 } 217 else if (*p == '^' && isalpha((unsigned char) p[1])) { 218 p++; 219 c = (*p == '?') ? '\177' : (*p & 0237); 220 } 221 else 222 c = *p; 223 *ptr = ++p; 224 return c; 225 } 226 227 /* parse__string(): 228 * Parse the escapes from in and put the raw string out 229 */ 230 protected char * 231 parse__string(out, in) 232 char *out; 233 const char *in; 234 { 235 char *rv = out; 236 int n; 237 for (;;) 238 switch (*in) { 239 case '\0': 240 *out = '\0'; 241 return rv; 242 243 case '\\': 244 case '^': 245 if ((n = parse__escape(&in)) == -1) 246 return NULL; 247 *out++ = n; 248 break; 249 250 default: 251 *out++ = *in++; 252 break; 253 } 254 } 255 256 /* parse_cmd(): 257 * Return the command number for the command string given 258 * or -1 if one is not found 259 */ 260 protected int 261 parse_cmd(el, cmd) 262 EditLine *el; 263 const char *cmd; 264 { 265 el_bindings_t *b; 266 267 for (b = el->el_map.help; b->name != NULL; b++) 268 if (strcmp(b->name, cmd) == 0) 269 return b->func; 270 return -1; 271 } 272