1 /*- 2 * Copyright (c) 1992, 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 * Christos Zoulas of Cornell University. 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $NetBSD: parse.c,v 1.22 2005/05/29 04:58:15 lukem Exp $ 33 */ 34 35 #if !defined(lint) && !defined(SCCSID) 36 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; 37 #endif /* not lint && not SCCSID */ 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 /* 42 * parse.c: parse an editline extended command 43 * 44 * commands are: 45 * 46 * bind 47 * echotc 48 * edit 49 * gettc 50 * history 51 * settc 52 * setty 53 */ 54 #include "sys.h" 55 #include "el.h" 56 #include <stdlib.h> 57 58 private const struct { 59 const char *name; 60 int (*func)(EditLine *, int, const char **); 61 } cmds[] = { 62 { "bind", map_bind }, 63 { "echotc", term_echotc }, 64 { "edit", el_editmode }, 65 { "history", hist_command }, 66 { "telltc", term_telltc }, 67 { "settc", term_settc }, 68 { "setty", tty_stty }, 69 { NULL, NULL } 70 }; 71 72 73 /* parse_line(): 74 * Parse a line and dispatch it 75 */ 76 protected int 77 parse_line(EditLine *el, const char *line) 78 { 79 const char **argv; 80 int argc; 81 Tokenizer *tok; 82 83 tok = tok_init(NULL); 84 tok_str(tok, line, &argc, &argv); 85 argc = el_parse(el, argc, argv); 86 tok_end(tok); 87 return (argc); 88 } 89 90 91 /* el_parse(): 92 * Command dispatcher 93 */ 94 public int 95 el_parse(EditLine *el, int argc, const char *argv[]) 96 { 97 const char *ptr; 98 int i; 99 100 if (argc < 1) 101 return (-1); 102 ptr = strchr(argv[0], ':'); 103 if (ptr != NULL) { 104 char *tprog; 105 size_t l; 106 107 if (ptr == argv[0]) 108 return (0); 109 l = ptr - argv[0] - 1; 110 tprog = (char *) el_malloc(l + 1); 111 if (tprog == NULL) 112 return (0); 113 (void) strncpy(tprog, argv[0], l); 114 tprog[l] = '\0'; 115 ptr++; 116 l = el_match(el->el_prog, tprog); 117 el_free(tprog); 118 if (!l) 119 return (0); 120 } else 121 ptr = argv[0]; 122 123 for (i = 0; cmds[i].name != NULL; i++) 124 if (strcmp(cmds[i].name, ptr) == 0) { 125 i = (*cmds[i].func) (el, argc, argv); 126 return (-i); 127 } 128 return (-1); 129 } 130 131 132 /* parse__escape(): 133 * Parse a string of the form ^<char> \<odigit> \<char> and return 134 * the appropriate character or -1 if the escape is not valid 135 */ 136 protected int 137 parse__escape(const char **ptr) 138 { 139 const char *p; 140 int c; 141 142 p = *ptr; 143 144 if (p[1] == 0) 145 return (-1); 146 147 if (*p == '\\') { 148 p++; 149 switch (*p) { 150 case 'a': 151 c = '\007'; /* Bell */ 152 break; 153 case 'b': 154 c = '\010'; /* Backspace */ 155 break; 156 case 't': 157 c = '\011'; /* Horizontal Tab */ 158 break; 159 case 'n': 160 c = '\012'; /* New Line */ 161 break; 162 case 'v': 163 c = '\013'; /* Vertical Tab */ 164 break; 165 case 'f': 166 c = '\014'; /* Form Feed */ 167 break; 168 case 'r': 169 c = '\015'; /* Carriage Return */ 170 break; 171 case 'e': 172 c = '\033'; /* Escape */ 173 break; 174 case '0': 175 case '1': 176 case '2': 177 case '3': 178 case '4': 179 case '5': 180 case '6': 181 case '7': 182 { 183 int cnt, ch; 184 185 for (cnt = 0, c = 0; cnt < 3; cnt++) { 186 ch = *p++; 187 if (ch < '0' || ch > '7') { 188 p--; 189 break; 190 } 191 c = (c << 3) | (ch - '0'); 192 } 193 if ((c & 0xffffff00) != 0) 194 return (-1); 195 --p; 196 break; 197 } 198 default: 199 c = *p; 200 break; 201 } 202 } else if (*p == '^') { 203 p++; 204 c = (*p == '?') ? '\177' : (*p & 0237); 205 } else 206 c = *p; 207 *ptr = ++p; 208 return ((unsigned char)c); 209 } 210 211 /* parse__string(): 212 * Parse the escapes from in and put the raw string out 213 */ 214 protected char * 215 parse__string(char *out, const char *in) 216 { 217 char *rv = out; 218 int n; 219 220 for (;;) 221 switch (*in) { 222 case '\0': 223 *out = '\0'; 224 return (rv); 225 226 case '\\': 227 case '^': 228 if ((n = parse__escape(&in)) == -1) 229 return (NULL); 230 *out++ = n; 231 break; 232 233 case 'M': 234 if (in[1] == '-' && in[2] != '\0') { 235 *out++ = '\033'; 236 in += 2; 237 break; 238 } 239 /*FALLTHROUGH*/ 240 241 default: 242 *out++ = *in++; 243 break; 244 } 245 } 246 247 248 /* parse_cmd(): 249 * Return the command number for the command string given 250 * or -1 if one is not found 251 */ 252 protected int 253 parse_cmd(EditLine *el, const char *cmd) 254 { 255 el_bindings_t *b; 256 257 for (b = el->el_map.help; b->name != NULL; b++) 258 if (strcmp(b->name, cmd) == 0) 259 return (b->func); 260 return (-1); 261 } 262