1 /* $NetBSD: parse.c,v 1.9 1998/12/12 20:08:22 christos 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 1.9 1998/12/12 20:08:22 christos 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 l = ptr - argv[0] - 1; 119 tprog = (char *)malloc(l + 1); 120 if (tprog == NULL) 121 return 0; 122 (void)strncpy(tprog, argv[0], l); 123 tprog[l] = '\0'; 124 ptr++; 125 l = el_match(el->el_prog, tprog); 126 free(tprog); 127 if (!l) 128 return 0; 129 } 130 else 131 ptr = argv[0]; 132 133 for (i = 0; cmds[i].name != NULL; i++) 134 if (strcmp(cmds[i].name, ptr) == 0) { 135 i = (*cmds[i].func)(el, argc, argv); 136 return -i; 137 } 138 139 return -1; 140 } 141 142 143 /* parse__escape(): 144 * Parse a string of the form ^<char> \<odigit> \<char> and return 145 * the appropriate character or -1 if the escape is not valid 146 */ 147 protected int 148 parse__escape(ptr) 149 const char ** const ptr; 150 { 151 const char *p; 152 int c; 153 154 p = *ptr; 155 156 if (p[1] == 0) 157 return -1; 158 159 if (*p == '\\') { 160 p++; 161 switch (*p) { 162 case 'a': 163 c = '\007'; /* Bell */ 164 break; 165 case 'b': 166 c = '\010'; /* Backspace */ 167 break; 168 case 't': 169 c = '\011'; /* Horizontal Tab */ 170 break; 171 case 'n': 172 c = '\012'; /* New Line */ 173 break; 174 case 'v': 175 c = '\013'; /* Vertical Tab */ 176 break; 177 case 'f': 178 c = '\014'; /* Form Feed */ 179 break; 180 case 'r': 181 c = '\015'; /* Carriage Return */ 182 break; 183 case 'e': 184 c = '\033'; /* Escape */ 185 break; 186 case '0': 187 case '1': 188 case '2': 189 case '3': 190 case '4': 191 case '5': 192 case '6': 193 case '7': 194 { 195 int cnt, ch; 196 197 for (cnt = 0, c = 0; cnt < 3; cnt++) { 198 ch = *p++; 199 if (ch < '0' || ch > '7') { 200 p--; 201 break; 202 } 203 c = (c << 3) | (ch - '0'); 204 } 205 if ((c & 0xffffff00) != 0) 206 return -1; 207 --p; 208 } 209 break; 210 default: 211 c = *p; 212 break; 213 } 214 } 215 else if (*p == '^' && isalpha((unsigned char) p[1])) { 216 p++; 217 c = (*p == '?') ? '\177' : (*p & 0237); 218 } 219 else 220 c = *p; 221 *ptr = ++p; 222 return c; 223 } 224 225 /* parse__string(): 226 * Parse the escapes from in and put the raw string out 227 */ 228 protected char * 229 parse__string(out, in) 230 char *out; 231 const char *in; 232 { 233 char *rv = out; 234 int n; 235 for (;;) 236 switch (*in) { 237 case '\0': 238 *out = '\0'; 239 return rv; 240 241 case '\\': 242 case '^': 243 if ((n = parse__escape(&in)) == -1) 244 return NULL; 245 *out++ = n; 246 break; 247 248 default: 249 *out++ = *in++; 250 break; 251 } 252 } 253 254 /* parse_cmd(): 255 * Return the command number for the command string given 256 * or -1 if one is not found 257 */ 258 protected int 259 parse_cmd(el, cmd) 260 EditLine *el; 261 const char *cmd; 262 { 263 el_bindings_t *b; 264 265 for (b = el->el_map.help; b->name != NULL; b++) 266 if (strcmp(b->name, cmd) == 0) 267 return b->func; 268 return -1; 269 } 270