parse.c revision 84334
190792Sgshapiro/*- 294334Sgshapiro * Copyright (c) 1992, 1993 390792Sgshapiro * The Regents of the University of California. All rights reserved. 490792Sgshapiro * 590792Sgshapiro * This code is derived from software contributed to Berkeley by 690792Sgshapiro * Christos Zoulas of Cornell University. 790792Sgshapiro * 890792Sgshapiro * Redistribution and use in source and binary forms, with or without 9132943Sgshapiro * modification, are permitted provided that the following conditions 1090792Sgshapiro * are met: 1190792Sgshapiro * 1. Redistributions of source code must retain the above copyright 1290792Sgshapiro * notice, this list of conditions and the following disclaimer. 1390792Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 1490792Sgshapiro * notice, this list of conditions and the following disclaimer in the 1590792Sgshapiro * documentation and/or other materials provided with the distribution. 1690792Sgshapiro * 3. All advertising materials mentioning features or use of this software 1790792Sgshapiro * must display the following acknowledgement: 1890792Sgshapiro * This product includes software developed by the University of 1990792Sgshapiro * California, Berkeley and its contributors. 2090792Sgshapiro * 4. Neither the name of the University nor the names of its contributors 2190792Sgshapiro * may be used to endorse or promote products derived from this software 2290792Sgshapiro * without specific prior written permission. 2390792Sgshapiro * 2490792Sgshapiro * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2590792Sgshapiro * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2690792Sgshapiro * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2790792Sgshapiro * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2890792Sgshapiro * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2990792Sgshapiro * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3090792Sgshapiro * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3190792Sgshapiro * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3290792Sgshapiro * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3390792Sgshapiro * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3490792Sgshapiro * SUCH DAMAGE. 3590792Sgshapiro * 3690792Sgshapiro * $NetBSD: parse.c,v 1.13 2000/09/04 22:06:31 lukem Exp $ 3790792Sgshapiro */ 3890792Sgshapiro 3990792Sgshapiro#if !defined(lint) && !defined(SCCSID) 4090792Sgshapirostatic char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; 4190792Sgshapiro#endif /* not lint && not SCCSID */ 4290792Sgshapiro#include <sys/cdefs.h> 4390792Sgshapiro__FBSDID("$FreeBSD: head/lib/libedit/parse.c 84334 2001-10-01 23:00:29Z obrien $"); 4490792Sgshapiro 4590792Sgshapiro/* 46132943Sgshapiro * parse.c: parse an editline extended command 4790792Sgshapiro * 4890792Sgshapiro * commands are: 4990792Sgshapiro * 5090792Sgshapiro * bind 5190792Sgshapiro * echotc 5290792Sgshapiro * edit 5390792Sgshapiro * gettc 5490792Sgshapiro * history 5590792Sgshapiro * settc 5690792Sgshapiro * setty 5790792Sgshapiro */ 5890792Sgshapiro#include "sys.h" 5990792Sgshapiro#include "el.h" 6090792Sgshapiro#include "tokenizer.h" 61132943Sgshapiro#include <stdlib.h> 62132943Sgshapiro 6390792Sgshapiroprivate const struct { 6490792Sgshapiro char *name; 6590792Sgshapiro int (*func)(EditLine *, int, char **); 6690792Sgshapiro} cmds[] = { 6790792Sgshapiro { "bind", map_bind }, 6890792Sgshapiro { "echotc", term_echotc }, 6990792Sgshapiro { "edit", el_editmode }, 7090792Sgshapiro { "history", hist_list }, 7190792Sgshapiro { "telltc", term_telltc }, 7290792Sgshapiro { "settc", term_settc }, 7390792Sgshapiro { "setty", tty_stty }, 7490792Sgshapiro { NULL, NULL } 7590792Sgshapiro}; 7690792Sgshapiro 7790792Sgshapiro 7890792Sgshapiro/* parse_line(): 7990792Sgshapiro * Parse a line and dispatch it 8090792Sgshapiro */ 81protected int 82parse_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 */ 99public int 100el_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 */ 141protected int 142parse__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 */ 218protected char * 219parse__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 */ 248protected int 249parse_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