1 /* $NetBSD: parse.c,v 1.7 1998/01/21 11:12:35 lukem 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 1.7 1998/01/21 11:12:35 lukem 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 * gettc 56 * history 57 * settc 58 * setty 59 */ 60 #include "sys.h" 61 #include "el.h" 62 #include "tokenizer.h" 63 64 private struct { 65 char *name; 66 int (*func) __P((EditLine *, int, char **)); 67 } cmds[] = { 68 { "bind", map_bind }, 69 { "echotc", term_echotc }, 70 { "history", hist_list }, 71 { "telltc", term_telltc }, 72 { "settc", term_settc }, 73 { "setty", tty_stty }, 74 { NULL, NULL } 75 }; 76 77 78 /* parse_line(): 79 * Parse a line and dispatch it 80 */ 81 protected int 82 parse_line(el, line) 83 EditLine *el; 84 const char *line; 85 { 86 char **argv; 87 int argc; 88 Tokenizer *tok; 89 90 tok = tok_init(NULL); 91 tok_line(tok, line, &argc, &argv); 92 argc = el_parse(el, argc, argv); 93 tok_end(tok); 94 return argc; 95 } 96 97 /* el_parse(): 98 * Command dispatcher 99 */ 100 public int 101 el_parse(el, argc, argv) 102 EditLine *el; 103 int argc; 104 char *argv[]; 105 { 106 char *ptr; 107 int i; 108 109 if (argc < 1) 110 return -1; 111 ptr = strchr(argv[0], ':'); 112 if (ptr != NULL) { 113 char *tprog; 114 int l; 115 116 l = ptr - argv[0] - 1; 117 tprog = (char *)malloc(l + 1); 118 if (tprog == NULL) 119 return 0; 120 strncpy(tprog, argv[0], l); 121 tprog[l] = '\0'; 122 ptr++; 123 l = el_match(el->el_prog, tprog); 124 free(tprog); 125 if (!l) 126 return 0; 127 } 128 else 129 ptr = argv[0]; 130 131 for (i = 0; cmds[i].name != NULL; i++) 132 if (strcmp(cmds[i].name, ptr) == 0) { 133 i = (*cmds[i].func)(el, argc, argv); 134 return -i; 135 } 136 137 return -1; 138 } 139 140 141 /* parse__escape(): 142 * Parse a string of the form ^<char> \<odigit> \<char> and return 143 * the appropriate character or -1 if the escape is not valid 144 */ 145 protected int 146 parse__escape(ptr) 147 const char ** const ptr; 148 { 149 const char *p; 150 int c; 151 152 p = *ptr; 153 154 if (p[1] == 0) 155 return -1; 156 157 if (*p == '\\') { 158 p++; 159 switch (*p) { 160 case 'a': 161 c = '\007'; /* Bell */ 162 break; 163 case 'b': 164 c = '\010'; /* Backspace */ 165 break; 166 case 't': 167 c = '\011'; /* Horizontal Tab */ 168 break; 169 case 'n': 170 c = '\012'; /* New Line */ 171 break; 172 case 'v': 173 c = '\013'; /* Vertical Tab */ 174 break; 175 case 'f': 176 c = '\014'; /* Form Feed */ 177 break; 178 case 'r': 179 c = '\015'; /* Carriage Return */ 180 break; 181 case 'e': 182 c = '\033'; /* Escape */ 183 break; 184 case '0': 185 case '1': 186 case '2': 187 case '3': 188 case '4': 189 case '5': 190 case '6': 191 case '7': 192 { 193 int cnt, ch; 194 195 for (cnt = 0, c = 0; cnt < 3; cnt++) { 196 ch = *p++; 197 if (ch < '0' || ch > '7') { 198 p--; 199 break; 200 } 201 c = (c << 3) | (ch - '0'); 202 } 203 if ((c & 0xffffff00) != 0) 204 return -1; 205 --p; 206 } 207 break; 208 default: 209 c = *p; 210 break; 211 } 212 } 213 else if (*p == '^' && isalpha((unsigned char) p[1])) { 214 p++; 215 c = (*p == '?') ? '\177' : (*p & 0237); 216 } 217 else 218 c = *p; 219 *ptr = ++p; 220 return c; 221 } 222 223 /* parse__string(): 224 * Parse the escapes from in and put the raw string out 225 */ 226 protected char * 227 parse__string(out, in) 228 char *out; 229 const char *in; 230 { 231 char *rv = out; 232 int n; 233 for (;;) 234 switch (*in) { 235 case '\0': 236 *out = '\0'; 237 return rv; 238 239 case '\\': 240 case '^': 241 if ((n = parse__escape(&in)) == -1) 242 return NULL; 243 *out++ = n; 244 break; 245 246 default: 247 *out++ = *in++; 248 break; 249 } 250 } 251 252 /* parse_cmd(): 253 * Return the command number for the command string given 254 * or -1 if one is not found 255 */ 256 protected int 257 parse_cmd(el, cmd) 258 EditLine *el; 259 const char *cmd; 260 { 261 el_bindings_t *b; 262 263 for (b = el->el_map.help; b->name != NULL; b++) 264 if (strcmp(b->name, cmd) == 0) 265 return b->func; 266 return -1; 267 } 268