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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $NetBSD: parse.c,v 1.13 2000/09/04 22:06:31 lukem Exp $ 37 */ 38 39 #if !defined(lint) && !defined(SCCSID) 40 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; 41 #endif /* not lint && not SCCSID */ 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 /* 46 * parse.c: parse an editline extended command 47 * 48 * commands are: 49 * 50 * bind 51 * echotc 52 * edit 53 * gettc 54 * history 55 * settc 56 * setty 57 */ 58 #include "sys.h" 59 #include "el.h" 60 #include "tokenizer.h" 61 #include <stdlib.h> 62 63 private const struct { 64 char *name; 65 int (*func)(EditLine *, int, char **); 66 } cmds[] = { 67 { "bind", map_bind }, 68 { "echotc", term_echotc }, 69 { "edit", el_editmode }, 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(EditLine *el, const char *line) 83 { 84 char **argv; 85 int argc; 86 Tokenizer *tok; 87 88 tok = tok_init(NULL); 89 tok_line(tok, line, &argc, &argv); 90 argc = el_parse(el, argc, argv); 91 tok_end(tok); 92 return (argc); 93 } 94 95 96 /* el_parse(): 97 * Command dispatcher 98 */ 99 public int 100 el_parse(EditLine *el, int argc, char *argv[]) 101 { 102 char *ptr; 103 int i; 104 105 if (argc < 1) 106 return (-1); 107 ptr = strchr(argv[0], ':'); 108 if (ptr != NULL) { 109 char *tprog; 110 size_t l; 111 112 if (ptr == argv[0]) 113 return (0); 114 l = ptr - argv[0] - 1; 115 tprog = (char *) el_malloc(l + 1); 116 if (tprog == NULL) 117 return (0); 118 (void) strncpy(tprog, argv[0], l); 119 tprog[l] = '\0'; 120 ptr++; 121 l = el_match(el->el_prog, tprog); 122 el_free(tprog); 123 if (!l) 124 return (0); 125 } else 126 ptr = argv[0]; 127 128 for (i = 0; cmds[i].name != NULL; i++) 129 if (strcmp(cmds[i].name, ptr) == 0) { 130 i = (*cmds[i].func) (el, argc, argv); 131 return (-i); 132 } 133 return (-1); 134 } 135 136 137 /* parse__escape(): 138 * Parse a string of the form ^<char> \<odigit> \<char> and return 139 * the appropriate character or -1 if the escape is not valid 140 */ 141 protected int 142 parse__escape(const char **const ptr) 143 { 144 const char *p; 145 int c; 146 147 p = *ptr; 148 149 if (p[1] == 0) 150 return (-1); 151 152 if (*p == '\\') { 153 p++; 154 switch (*p) { 155 case 'a': 156 c = '\007'; /* Bell */ 157 break; 158 case 'b': 159 c = '\010'; /* Backspace */ 160 break; 161 case 't': 162 c = '\011'; /* Horizontal Tab */ 163 break; 164 case 'n': 165 c = '\012'; /* New Line */ 166 break; 167 case 'v': 168 c = '\013'; /* Vertical Tab */ 169 break; 170 case 'f': 171 c = '\014'; /* Form Feed */ 172 break; 173 case 'r': 174 c = '\015'; /* Carriage Return */ 175 break; 176 case 'e': 177 c = '\033'; /* Escape */ 178 break; 179 case '0': 180 case '1': 181 case '2': 182 case '3': 183 case '4': 184 case '5': 185 case '6': 186 case '7': 187 { 188 int cnt, ch; 189 190 for (cnt = 0, c = 0; cnt < 3; cnt++) { 191 ch = *p++; 192 if (ch < '0' || ch > '7') { 193 p--; 194 break; 195 } 196 c = (c << 3) | (ch - '0'); 197 } 198 if ((c & 0xffffff00) != 0) 199 return (-1); 200 --p; 201 break; 202 } 203 default: 204 c = *p; 205 break; 206 } 207 } else if (*p == '^' && isascii(p[1]) && (p[1] == '?' || isalpha(p[1]))) { 208 p++; 209 c = (*p == '?') ? '\177' : (*p & 0237); 210 } else 211 c = *p; 212 *ptr = ++p; 213 return ((unsigned char)c); 214 } 215 /* parse__string(): 216 * Parse the escapes from in and put the raw string out 217 */ 218 protected char * 219 parse__string(char *out, const char *in) 220 { 221 char *rv = out; 222 int n; 223 224 for (;;) 225 switch (*in) { 226 case '\0': 227 *out = '\0'; 228 return (rv); 229 230 case '\\': 231 case '^': 232 if ((n = parse__escape(&in)) == -1) 233 return (NULL); 234 *out++ = n; 235 break; 236 237 default: 238 *out++ = *in++; 239 break; 240 } 241 } 242 243 244 /* parse_cmd(): 245 * Return the command number for the command string given 246 * or -1 if one is not found 247 */ 248 protected int 249 parse_cmd(EditLine *el, const char *cmd) 250 { 251 el_bindings_t *b; 252 253 for (b = el->el_map.help; b->name != NULL; b++) 254 if (strcmp(b->name, cmd) == 0) 255 return (b->func); 256 return (-1); 257 } 258