1 /* $NetBSD: parse.c,v 1.15 2002/03/18 16:00:56 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 "config.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 1.15 2002/03/18 16:00:56 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 "el.h" 62 #include "tokenizer.h" 63 #include <stdlib.h> 64 65 private const struct { 66 const char *name; 67 int (*func)(EditLine *, int, const 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(EditLine *el, const char *line) 85 { 86 const 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 98 /* el_parse(): 99 * Command dispatcher 100 */ 101 public int 102 el_parse(EditLine *el, int argc, const char *argv[]) 103 { 104 const char *ptr; 105 int i; 106 107 if (argc < 1) 108 return (-1); 109 ptr = strchr(argv[0], ':'); 110 if (ptr != NULL) { 111 char *tprog; 112 size_t l; 113 114 if (ptr == argv[0]) 115 return (0); 116 l = ptr - argv[0] - 1; 117 tprog = (char *) el_malloc(l + 1); 118 if (tprog == NULL) 119 return (0); 120 (void) strncpy(tprog, argv[0], l); 121 tprog[l] = '\0'; 122 ptr++; 123 l = el_match(el->el_prog, tprog); 124 el_free(tprog); 125 if (!l) 126 return (0); 127 } else 128 ptr = argv[0]; 129 130 for (i = 0; cmds[i].name != NULL; i++) 131 if (strcmp(cmds[i].name, ptr) == 0) { 132 i = (*cmds[i].func) (el, argc, argv); 133 return (-i); 134 } 135 return (-1); 136 } 137 138 139 /* parse__escape(): 140 * Parse a string of the form ^<char> \<odigit> \<char> and return 141 * the appropriate character or -1 if the escape is not valid 142 */ 143 protected int 144 parse__escape(const char **const ptr) 145 { 146 const char *p; 147 int c; 148 149 p = *ptr; 150 151 if (p[1] == 0) 152 return (-1); 153 154 if (*p == '\\') { 155 p++; 156 switch (*p) { 157 case 'a': 158 c = '\007'; /* Bell */ 159 break; 160 case 'b': 161 c = '\010'; /* Backspace */ 162 break; 163 case 't': 164 c = '\011'; /* Horizontal Tab */ 165 break; 166 case 'n': 167 c = '\012'; /* New Line */ 168 break; 169 case 'v': 170 c = '\013'; /* Vertical Tab */ 171 break; 172 case 'f': 173 c = '\014'; /* Form Feed */ 174 break; 175 case 'r': 176 c = '\015'; /* Carriage Return */ 177 break; 178 case 'e': 179 c = '\033'; /* Escape */ 180 break; 181 case '0': 182 case '1': 183 case '2': 184 case '3': 185 case '4': 186 case '5': 187 case '6': 188 case '7': 189 { 190 int cnt, ch; 191 192 for (cnt = 0, c = 0; cnt < 3; cnt++) { 193 ch = *p++; 194 if (ch < '0' || ch > '7') { 195 p--; 196 break; 197 } 198 c = (c << 3) | (ch - '0'); 199 } 200 if ((c & 0xffffff00) != 0) 201 return (-1); 202 --p; 203 break; 204 } 205 default: 206 c = *p; 207 break; 208 } 209 } else if (*p == '^' && isalpha((unsigned char) p[1])) { 210 p++; 211 c = (*p == '?') ? '\177' : (*p & 0237); 212 } else 213 c = *p; 214 *ptr = ++p; 215 return (c); 216 } 217 /* parse__string(): 218 * Parse the escapes from in and put the raw string out 219 */ 220 protected char * 221 parse__string(char *out, const char *in) 222 { 223 char *rv = out; 224 int n; 225 226 for (;;) 227 switch (*in) { 228 case '\0': 229 *out = '\0'; 230 return (rv); 231 232 case '\\': 233 case '^': 234 if ((n = parse__escape(&in)) == -1) 235 return (NULL); 236 *out++ = n; 237 break; 238 239 default: 240 *out++ = *in++; 241 break; 242 } 243 } 244 245 246 /* parse_cmd(): 247 * Return the command number for the command string given 248 * or -1 if one is not found 249 */ 250 protected int 251 parse_cmd(EditLine *el, const char *cmd) 252 { 253 el_bindings_t *b; 254 255 for (b = el->el_map.help; b->name != NULL; b++) 256 if (strcmp(b->name, cmd) == 0) 257 return (b->func); 258 return (-1); 259 } 260