2 * SPDX-License-Identifier: MIT-CMU
4 * Mach Operating System
5 * Copyright (c) 1991,1990 Carnegie Mellon University
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 * Carnegie Mellon requests users of this software to return to
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
29 * Author: David B. Golub, Carnegie Mellon University
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/libkern.h>
43 #include <ddb/db_lex.h>
45 static char db_line[DB_MAXLINE];
46 static char * db_lp, *db_endlp;
48 static int db_lex(void);
49 static void db_flush_line(void);
50 static int db_read_char(void);
51 static void db_unread_char(int);
58 i = db_readline(db_line, sizeof(db_line));
67 * Simulate a line of input into DDB.
70 db_inject_line(const char *command)
73 strlcpy(db_line, command, sizeof(db_line));
75 db_endlp = db_lp + strlen(command);
79 * In rare cases, we may want to pull the remainder of the line input
80 * verbatim, rather than lexing it. For example, when assigning literal
81 * values associated with scripts. In that case, return a static pointer to
82 * the current location in the input buffer. The caller must be aware that
83 * the contents are not stable if other lex/input calls are made.
99 static int db_look_char = 0;
106 if (db_look_char != 0) {
110 else if (db_lp >= db_endlp)
124 static int db_look_token = 0;
147 db_expr_t db_tok_number;
148 char db_tok_string[TOK_STRING_SIZE];
150 db_expr_t db_radix = 16;
166 while (c <= ' ' || c > '~') {
167 if (c == '\n' || c == -1)
172 if (c >= '0' && c <= '9') {
180 if (c == 'O' || c == 'o')
182 else if (c == 'T' || c == 't')
184 else if (c == 'X' || c == 'x')
194 if (c >= '0' && c <= ((r == 8) ? '7' : '9'))
196 else if (r == 16 && ((c >= 'A' && c <= 'F') ||
197 (c >= 'a' && c <= 'f'))) {
199 digit = c - 'a' + 10;
201 digit = c - 'A' + 10;
205 db_tok_number = db_tok_number * r + digit;
208 if ((c >= '0' && c <= '9') ||
209 (c >= 'A' && c <= 'Z') ||
210 (c >= 'a' && c <= 'z') ||
213 db_error("Bad character in number\n");
220 if ((c >= 'A' && c <= 'Z') ||
221 (c >= 'a' && c <= 'z') ||
222 c == '_' || c == '\\')
230 if (c == '\n' || c == -1)
231 db_error("Bad escape\n");
236 if ((c >= 'A' && c <= 'Z') ||
237 (c >= 'a' && c <= 'z') ||
238 (c >= '0' && c <= '9') ||
239 c == '_' || c == '\\' || c == ':' || c == '.')
243 if (c == '\n' || c == -1)
244 db_error("Bad escape\n");
247 if (cp == db_tok_string+sizeof(db_tok_string)) {
248 db_error("String too long\n");
301 return (tLOG_NOT_EQ);
332 return (tGREATER_EQ);
342 db_printf("Bad character\n");