1 /* $NetBSD: parse.c,v 1.12 2000/03/10 12:25:47 jdolecek 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 1.12 2000/03/10 12:25:47 jdolecek 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 #include <stdlib.h> 65 66 private struct { 67 char *name; 68 int (*func) __P((EditLine *, int, char **)); 69 } cmds[] = { 70 { "bind", map_bind }, 71 { "echotc", term_echotc }, 72 { "edit", el_editmode }, 73 { "history", hist_list }, 74 { "telltc", term_telltc }, 75 { "settc", term_settc }, 76 { "setty", tty_stty }, 77 { NULL, NULL } 78 }; 79 80 81 /* parse_line(): 82 * Parse a line and dispatch it 83 */ 84 protected int 85 parse_line(el, line) 86 EditLine *el; 87 const char *line; 88 { 89 char **argv; 90 int argc; 91 Tokenizer *tok; 92 93 tok = tok_init(NULL); 94 tok_line(tok, line, &argc, &argv); 95 argc = el_parse(el, argc, argv); 96 tok_end(tok); 97 return argc; 98 } 99 100 /* el_parse(): 101 * Command dispatcher 102 */ 103 public int 104 el_parse(el, argc, argv) 105 EditLine *el; 106 int argc; 107 char *argv[]; 108 { 109 char *ptr; 110 int i; 111 112 if (argc < 1) 113 return -1; 114 ptr = strchr(argv[0], ':'); 115 if (ptr != NULL) { 116 char *tprog; 117 size_t l; 118 119 if (ptr == argv[0]) 120 return 0; 121 l = ptr - argv[0] - 1; 122 tprog = (char *)el_malloc(l + 1); 123 if (tprog == NULL) 124 return 0; 125 (void)strncpy(tprog, argv[0], l); 126 tprog[l] = '\0'; 127 ptr++; 128 l = el_match(el->el_prog, tprog); 129 el_free(tprog); 130 if (!l) 131 return 0; 132 } 133 else 134 ptr = argv[0]; 135 136 for (i = 0; cmds[i].name != NULL; i++) 137 if (strcmp(cmds[i].name, ptr) == 0) { 138 i = (*cmds[i].func)(el, argc, argv); 139 return -i; 140 } 141 142 return -1; 143 } 144 145 146 /* parse__escape(): 147 * Parse a string of the form ^<char> \<odigit> \<char> and return 148 * the appropriate character or -1 if the escape is not valid 149 */ 150 protected int 151 parse__escape(ptr) 152 const char ** const ptr; 153 { 154 const char *p; 155 int c; 156 157 p = *ptr; 158 159 if (p[1] == 0) 160 return -1; 161 162 if (*p == '\\') { 163 p++; 164 switch (*p) { 165 case 'a': 166 c = '\007'; /* Bell */ 167 break; 168 case 'b': 169 c = '\010'; /* Backspace */ 170 break; 171 case 't': 172 c = '\011'; /* Horizontal Tab */ 173 break; 174 case 'n': 175 c = '\012'; /* New Line */ 176 break; 177 case 'v': 178 c = '\013'; /* Vertical Tab */ 179 break; 180 case 'f': 181 c = '\014'; /* Form Feed */ 182 break; 183 case 'r': 184 c = '\015'; /* Carriage Return */ 185 break; 186 case 'e': 187 c = '\033'; /* Escape */ 188 break; 189 case '0': 190 case '1': 191 case '2': 192 case '3': 193 case '4': 194 case '5': 195 case '6': 196 case '7': 197 { 198 int cnt, ch; 199 200 for (cnt = 0, c = 0; cnt < 3; cnt++) { 201 ch = *p++; 202 if (ch < '0' || ch > '7') { 203 p--; 204 break; 205 } 206 c = (c << 3) | (ch - '0'); 207 } 208 if ((c & 0xffffff00) != 0) 209 return -1; 210 --p; 211 } 212 break; 213 default: 214 c = *p; 215 break; 216 } 217 } 218 else if (*p == '^' && isalpha((unsigned char) p[1])) { 219 p++; 220 c = (*p == '?') ? '\177' : (*p & 0237); 221 } 222 else 223 c = *p; 224 *ptr = ++p; 225 return c; 226 } 227 228 /* parse__string(): 229 * Parse the escapes from in and put the raw string out 230 */ 231 protected char * 232 parse__string(out, in) 233 char *out; 234 const char *in; 235 { 236 char *rv = out; 237 int n; 238 for (;;) 239 switch (*in) { 240 case '\0': 241 *out = '\0'; 242 return rv; 243 244 case '\\': 245 case '^': 246 if ((n = parse__escape(&in)) == -1) 247 return NULL; 248 *out++ = n; 249 break; 250 251 default: 252 *out++ = *in++; 253 break; 254 } 255 } 256 257 /* parse_cmd(): 258 * Return the command number for the command string given 259 * or -1 if one is not found 260 */ 261 protected int 262 parse_cmd(el, cmd) 263 EditLine *el; 264 const char *cmd; 265 { 266 el_bindings_t *b; 267 268 for (b = el->el_map.help; b->name != NULL; b++) 269 if (strcmp(b->name, cmd) == 0) 270 return b->func; 271 return -1; 272 } 273