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 44 /* 45 * parse.c: parse an editline extended command 46 * 47 * commands are: 48 * 49 * bind 50 * echotc 51 * edit 52 * gettc 53 * history 54 * settc 55 * setty 56 */ 57 #include "el.h" 58 #include <stdlib.h> 59 60 private const struct { 61 const Char *name; 62 int (*func)(EditLine *, int, const Char **); 63 } cmds[] = { 64 { STR("bind"), map_bind }, 65 { STR("echotc"), terminal_echotc }, 66 { STR("edit"), el_editmode }, 67 { STR("history"), hist_command }, 68 { STR("telltc"), terminal_telltc }, 69 { STR("settc"), terminal_settc }, 70 { STR("setty"), tty_stty }, 71 { NULL, NULL } 72 }; 73 74 75 /* parse_line(): 76 * Parse a line and dispatch it 77 */ 78 protected int 79 parse_line(EditLine *el, const Char *line) 80 { 81 const Char **argv; 82 int argc; 83 TYPE(Tokenizer) *tok; 84 85 tok = FUN(tok,init)(NULL); 86 FUN(tok,str)(tok, line, &argc, &argv); 87 argc = FUN(el,parse)(el, argc, argv); 88 FUN(tok,end)(tok); 89 return argc; 90 } 91 92 93 /* el_parse(): 94 * Command dispatcher 95 */ 96 public int 97 FUN(el,parse)(EditLine *el, int argc, const Char *argv[]) 98 { 99 const Char *ptr; 100 int i; 101 102 if (argc < 1) 103 return -1; 104 ptr = Strchr(argv[0], ':'); 105 if (ptr != NULL) { 106 Char *tprog; 107 size_t l; 108 109 if (ptr == argv[0]) 110 return 0; 111 l = (size_t)(ptr - argv[0] - 1); 112 tprog = el_malloc((l + 1) * sizeof(*tprog)); 113 if (tprog == NULL) 114 return 0; 115 (void) Strncpy(tprog, argv[0], l); 116 tprog[l] = '\0'; 117 ptr++; 118 l = (size_t)el_match(el->el_prog, tprog); 119 el_free(tprog); 120 if (!l) 121 return 0; 122 } else 123 ptr = argv[0]; 124 125 for (i = 0; cmds[i].name != NULL; i++) 126 if (Strcmp(cmds[i].name, ptr) == 0) { 127 i = (*cmds[i].func) (el, argc, argv); 128 return -i; 129 } 130 return -1; 131 } 132 133 134 /* parse__escape(): 135 * Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return 136 * the appropriate character or -1 if the escape is not valid 137 */ 138 protected int 139 parse__escape(const Char **ptr) 140 { 141 const Char *p; 142 Int c; 143 144 p = *ptr; 145 146 if (p[1] == 0) 147 return -1; 148 149 if (*p == '\\') { 150 p++; 151 switch (*p) { 152 case 'a': 153 c = '\007'; /* Bell */ 154 break; 155 case 'b': 156 c = '\010'; /* Backspace */ 157 break; 158 case 't': 159 c = '\011'; /* Horizontal Tab */ 160 break; 161 case 'n': 162 c = '\012'; /* New Line */ 163 break; 164 case 'v': 165 c = '\013'; /* Vertical Tab */ 166 break; 167 case 'f': 168 c = '\014'; /* Form Feed */ 169 break; 170 case 'r': 171 c = '\015'; /* Carriage Return */ 172 break; 173 case 'e': 174 c = '\033'; /* Escape */ 175 break; 176 case 'U': /* Unicode \U+xxxx or \U+xxxxx format */ 177 { 178 int i; 179 const Char hex[] = STR("0123456789ABCDEF"); 180 const Char *h; 181 ++p; 182 if (*p++ != '+') 183 return -1; 184 c = 0; 185 for (i = 0; i < 5; ++i) { 186 h = Strchr(hex, *p++); 187 if (!h && i < 4) 188 return -1; 189 else if (h) 190 c = (c << 4) | ((int)(h - hex)); 191 else 192 --p; 193 } 194 if (c > 0x10FFFF) /* outside valid character range */ 195 return -1; 196 break; 197 } 198 case '0': 199 case '1': 200 case '2': 201 case '3': 202 case '4': 203 case '5': 204 case '6': 205 case '7': 206 { 207 int cnt, ch; 208 209 for (cnt = 0, c = 0; cnt < 3; cnt++) { 210 ch = *p++; 211 if (ch < '0' || ch > '7') { 212 p--; 213 break; 214 } 215 c = (c << 3) | (ch - '0'); 216 } 217 if ((c & (wint_t)0xffffff00) != (wint_t)0) 218 return -1; 219 --p; 220 break; 221 } 222 default: 223 c = *p; 224 break; 225 } 226 } else if (*p == '^') { 227 p++; 228 c = (*p == '?') ? '\177' : (*p & 0237); 229 } else 230 c = *p; 231 *ptr = ++p; 232 return c; 233 } 234 235 /* parse__string(): 236 * Parse the escapes from in and put the raw string out 237 */ 238 protected Char * 239 parse__string(Char *out, const Char *in) 240 { 241 Char *rv = out; 242 int n; 243 244 for (;;) 245 switch (*in) { 246 case '\0': 247 *out = '\0'; 248 return rv; 249 250 case '\\': 251 case '^': 252 if ((n = parse__escape(&in)) == -1) 253 return NULL; 254 *out++ = n; 255 break; 256 257 case 'M': 258 if (in[1] == '-' && in[2] != '\0') { 259 *out++ = '\033'; 260 in += 2; 261 break; 262 } 263 /*FALLTHROUGH*/ 264 265 default: 266 *out++ = *in++; 267 break; 268 } 269 } 270 271 272 /* parse_cmd(): 273 * Return the command number for the command string given 274 * or -1 if one is not found 275 */ 276 protected int 277 parse_cmd(EditLine *el, const Char *cmd) 278 { 279 el_bindings_t *b = el->el_map.help; 280 size_t i; 281 282 for (i = 0; i < el->el_map.nfunc; i++) 283 if (Strcmp(b[i].name, cmd) == 0) 284 return b[i].func; 285 return -1; 286 } 287