1 /* $NetBSD: parse.c,v 1.14 2001/01/23 15:55:30 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 1.14 2001/01/23 15:55:30 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 const struct { 67 char *name; 68 int (*func)(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(EditLine *el, const char *line) 86 { 87 char **argv; 88 int argc; 89 Tokenizer *tok; 90 91 tok = tok_init(NULL); 92 tok_line(tok, line, &argc, &argv); 93 argc = el_parse(el, argc, argv); 94 tok_end(tok); 95 return (argc); 96 } 97 98 99 /* el_parse(): 100 * Command dispatcher 101 */ 102 public int 103 el_parse(EditLine *el, int argc, char *argv[]) 104 { 105 char *ptr; 106 int i; 107 108 if (argc < 1) 109 return (-1); 110 ptr = strchr(argv[0], ':'); 111 if (ptr != NULL) { 112 char *tprog; 113 size_t l; 114 115 if (ptr == argv[0]) 116 return (0); 117 l = ptr - argv[0] - 1; 118 tprog = (char *) el_malloc(l + 1); 119 if (tprog == NULL) 120 return (0); 121 (void) strncpy(tprog, argv[0], l); 122 tprog[l] = '\0'; 123 ptr++; 124 l = el_match(el->el_prog, tprog); 125 el_free(tprog); 126 if (!l) 127 return (0); 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 return (-1); 137 } 138 139 140 /* parse__escape(): 141 * Parse a string of the form ^<char> \<odigit> \<char> and return 142 * the appropriate character or -1 if the escape is not valid 143 */ 144 protected int 145 parse__escape(const char **const ptr) 146 { 147 const char *p; 148 int c; 149 150 p = *ptr; 151 152 if (p[1] == 0) 153 return (-1); 154 155 if (*p == '\\') { 156 p++; 157 switch (*p) { 158 case 'a': 159 c = '\007'; /* Bell */ 160 break; 161 case 'b': 162 c = '\010'; /* Backspace */ 163 break; 164 case 't': 165 c = '\011'; /* Horizontal Tab */ 166 break; 167 case 'n': 168 c = '\012'; /* New Line */ 169 break; 170 case 'v': 171 c = '\013'; /* Vertical Tab */ 172 break; 173 case 'f': 174 c = '\014'; /* Form Feed */ 175 break; 176 case 'r': 177 c = '\015'; /* Carriage Return */ 178 break; 179 case 'e': 180 c = '\033'; /* Escape */ 181 break; 182 case '0': 183 case '1': 184 case '2': 185 case '3': 186 case '4': 187 case '5': 188 case '6': 189 case '7': 190 { 191 int cnt, ch; 192 193 for (cnt = 0, c = 0; cnt < 3; cnt++) { 194 ch = *p++; 195 if (ch < '0' || ch > '7') { 196 p--; 197 break; 198 } 199 c = (c << 3) | (ch - '0'); 200 } 201 if ((c & 0xffffff00) != 0) 202 return (-1); 203 --p; 204 break; 205 } 206 default: 207 c = *p; 208 break; 209 } 210 } else if (*p == '^' && isalpha((unsigned char) p[1])) { 211 p++; 212 c = (*p == '?') ? '\177' : (*p & 0237); 213 } else 214 c = *p; 215 *ptr = ++p; 216 return (c); 217 } 218 /* parse__string(): 219 * Parse the escapes from in and put the raw string out 220 */ 221 protected char * 222 parse__string(char *out, const char *in) 223 { 224 char *rv = out; 225 int n; 226 227 for (;;) 228 switch (*in) { 229 case '\0': 230 *out = '\0'; 231 return (rv); 232 233 case '\\': 234 case '^': 235 if ((n = parse__escape(&in)) == -1) 236 return (NULL); 237 *out++ = n; 238 break; 239 240 default: 241 *out++ = *in++; 242 break; 243 } 244 } 245 246 247 /* parse_cmd(): 248 * Return the command number for the command string given 249 * or -1 if one is not found 250 */ 251 protected int 252 parse_cmd(EditLine *el, const char *cmd) 253 { 254 el_bindings_t *b; 255 256 for (b = el->el_map.help; b->name != NULL; b++) 257 if (strcmp(b->name, cmd) == 0) 258 return (b->func); 259 return (-1); 260 } 261