1 /* $NetBSD: parse.c,v 1.27 2014/07/06 18:15:34 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "config.h" 36 #if !defined(lint) && !defined(SCCSID) 37 #if 0 38 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 __RCSID("$NetBSD: parse.c,v 1.27 2014/07/06 18:15:34 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 /* 47 * parse.c: parse an editline extended command 48 * 49 * commands are: 50 * 51 * bind 52 * echotc 53 * edit 54 * gettc 55 * history 56 * settc 57 * setty 58 */ 59 #include "el.h" 60 #include <stdlib.h> 61 62 private const struct { 63 const Char *name; 64 int (*func)(EditLine *, int, const Char **); 65 } cmds[] = { 66 { STR("bind"), map_bind }, 67 { STR("echotc"), terminal_echotc }, 68 { STR("edit"), el_editmode }, 69 { STR("history"), hist_command }, 70 { STR("telltc"), terminal_telltc }, 71 { STR("settc"), terminal_settc }, 72 { STR("setty"), tty_stty }, 73 { NULL, NULL } 74 }; 75 76 77 /* parse_line(): 78 * Parse a line and dispatch it 79 */ 80 protected int 81 parse_line(EditLine *el, const Char *line) 82 { 83 const Char **argv; 84 int argc; 85 TYPE(Tokenizer) *tok; 86 87 tok = FUN(tok,init)(NULL); 88 FUN(tok,str)(tok, line, &argc, &argv); 89 argc = FUN(el,parse)(el, argc, argv); 90 FUN(tok,end)(tok); 91 return argc; 92 } 93 94 95 /* el_parse(): 96 * Command dispatcher 97 */ 98 public int 99 FUN(el,parse)(EditLine *el, int argc, const Char *argv[]) 100 { 101 const Char *ptr; 102 int i; 103 104 if (argc < 1) 105 return -1; 106 ptr = Strchr(argv[0], ':'); 107 if (ptr != NULL) { 108 Char *tprog; 109 size_t l; 110 111 if (ptr == argv[0]) 112 return 0; 113 l = (size_t)(ptr - argv[0] - 1); 114 tprog = el_malloc((l + 1) * sizeof(*tprog)); 115 if (tprog == NULL) 116 return 0; 117 (void) Strncpy(tprog, argv[0], l); 118 tprog[l] = '\0'; 119 ptr++; 120 l = (size_t)el_match(el->el_prog, tprog); 121 el_free(tprog); 122 if (!l) 123 return 0; 124 } else 125 ptr = argv[0]; 126 127 for (i = 0; cmds[i].name != NULL; i++) 128 if (Strcmp(cmds[i].name, ptr) == 0) { 129 i = (*cmds[i].func) (el, argc, argv); 130 return -i; 131 } 132 return -1; 133 } 134 135 136 /* parse__escape(): 137 * Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return 138 * the appropriate character or -1 if the escape is not valid 139 */ 140 protected int 141 parse__escape(const Char **ptr) 142 { 143 const Char *p; 144 Int c; 145 146 p = *ptr; 147 148 if (p[1] == 0) 149 return -1; 150 151 if (*p == '\\') { 152 p++; 153 switch (*p) { 154 case 'a': 155 c = '\007'; /* Bell */ 156 break; 157 case 'b': 158 c = '\010'; /* Backspace */ 159 break; 160 case 't': 161 c = '\011'; /* Horizontal Tab */ 162 break; 163 case 'n': 164 c = '\012'; /* New Line */ 165 break; 166 case 'v': 167 c = '\013'; /* Vertical Tab */ 168 break; 169 case 'f': 170 c = '\014'; /* Form Feed */ 171 break; 172 case 'r': 173 c = '\015'; /* Carriage Return */ 174 break; 175 case 'e': 176 c = '\033'; /* Escape */ 177 break; 178 case 'U': /* Unicode \U+xxxx or \U+xxxxx format */ 179 { 180 int i; 181 const Char hex[] = STR("0123456789ABCDEF"); 182 const Char *h; 183 ++p; 184 if (*p++ != '+') 185 return -1; 186 c = 0; 187 for (i = 0; i < 5; ++i) { 188 h = Strchr(hex, *p++); 189 if (!h && i < 4) 190 return -1; 191 else if (h) 192 c = (c << 4) | ((int)(h - hex)); 193 else 194 --p; 195 } 196 if (c > 0x10FFFF) /* outside valid character range */ 197 return -1; 198 break; 199 } 200 case '0': 201 case '1': 202 case '2': 203 case '3': 204 case '4': 205 case '5': 206 case '6': 207 case '7': 208 { 209 int cnt, ch; 210 211 for (cnt = 0, c = 0; cnt < 3; cnt++) { 212 ch = *p++; 213 if (ch < '0' || ch > '7') { 214 p--; 215 break; 216 } 217 c = (c << 3) | (ch - '0'); 218 } 219 if ((c & (wint_t)0xffffff00) != (wint_t)0) 220 return -1; 221 --p; 222 break; 223 } 224 default: 225 c = *p; 226 break; 227 } 228 } else if (*p == '^') { 229 p++; 230 c = (*p == '?') ? '\177' : (*p & 0237); 231 } else 232 c = *p; 233 *ptr = ++p; 234 return c; 235 } 236 237 /* parse__string(): 238 * Parse the escapes from in and put the raw string out 239 */ 240 protected Char * 241 parse__string(Char *out, const Char *in) 242 { 243 Char *rv = out; 244 int n; 245 246 for (;;) 247 switch (*in) { 248 case '\0': 249 *out = '\0'; 250 return rv; 251 252 case '\\': 253 case '^': 254 if ((n = parse__escape(&in)) == -1) 255 return NULL; 256 *out++ = n; 257 break; 258 259 case 'M': 260 if (in[1] == '-' && in[2] != '\0') { 261 *out++ = '\033'; 262 in += 2; 263 break; 264 } 265 /*FALLTHROUGH*/ 266 267 default: 268 *out++ = *in++; 269 break; 270 } 271 } 272 273 274 /* parse_cmd(): 275 * Return the command number for the command string given 276 * or -1 if one is not found 277 */ 278 protected int 279 parse_cmd(EditLine *el, const Char *cmd) 280 { 281 el_bindings_t *b = el->el_map.help; 282 size_t i; 283 284 for (i = 0; i < el->el_map.nfunc; i++) 285 if (Strcmp(b[i].name, cmd) == 0) 286 return b[i].func; 287 return -1; 288 } 289