blob: 254d5af889562f5e5987db2de1f45f42249d7723 [file] [log] [blame]
David Gibsona4da2e32007-12-18 15:06:42 +11001/*
2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
John Bonesio658f29a2010-11-17 15:28:20 -080021%option noyywrap nounput noinput never-interactive
David Gibsona4da2e32007-12-18 15:06:42 +110022
23%x INCLUDE
24%x BYTESTRING
25%x PROPNODENAME
26%s V1
27
28PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
29PATHCHAR ({PROPNODECHAR}|[/])
30LABEL [a-zA-Z_][a-zA-Z0-9_]*
David Gibsoned95d742008-08-07 12:24:17 +100031STRING \"([^\\"]|\\.)*\"
Stephen Warrencd296722012-09-28 21:25:59 +000032CHAR_LITERAL '([^']|\\')*'
David Gibsoned95d742008-08-07 12:24:17 +100033WS [[:space:]]
34COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
35LINECOMMENT "//".*\n
David Gibsona4da2e32007-12-18 15:06:42 +110036
37%{
38#include "dtc.h"
39#include "srcpos.h"
40#include "dtc-parser.tab.h"
41
John Bonesio658f29a2010-11-17 15:28:20 -080042YYLTYPE yylloc;
43
44/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
45#define YY_USER_ACTION \
46 { \
47 srcpos_update(&yylloc, yytext, yyleng); \
48 }
David Gibsona4da2e32007-12-18 15:06:42 +110049
50/*#define LEXDEBUG 1*/
51
52#ifdef LEXDEBUG
53#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
54#else
55#define DPRINT(fmt, ...) do { } while (0)
56#endif
57
John Bonesio658f29a2010-11-17 15:28:20 -080058static int dts_version = 1;
David Gibsona4da2e32007-12-18 15:06:42 +110059
John Bonesio658f29a2010-11-17 15:28:20 -080060#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
David Gibsona4da2e32007-12-18 15:06:42 +110061 BEGIN(V1); \
David Gibsoned95d742008-08-07 12:24:17 +100062
63static void push_input_file(const char *filename);
64static int pop_input_file(void);
David Gibsona4da2e32007-12-18 15:06:42 +110065%}
66
67%%
David Gibsoned95d742008-08-07 12:24:17 +100068<*>"/include/"{WS}*{STRING} {
69 char *name = strchr(yytext, '\"') + 1;
70 yytext[yyleng-1] = '\0';
71 push_input_file(name);
David Gibsona4da2e32007-12-18 15:06:42 +110072 }
73
Stephen Warrencd296722012-09-28 21:25:59 +000074<*>^"#"(line)?{WS}+[0-9]+{WS}+{STRING}({WS}+[0-9]+)? {
75 char *line, *tmp, *fn;
76 /* skip text before line # */
77 line = yytext;
78 while (!isdigit(*line))
79 line++;
80 /* skip digits in line # */
81 tmp = line;
82 while (!isspace(*tmp))
83 tmp++;
84 /* "NULL"-terminate line # */
85 *tmp = '\0';
86 /* start of filename */
87 fn = strchr(tmp + 1, '"') + 1;
88 /* strip trailing " from filename */
89 tmp = strchr(fn, '"');
90 *tmp = 0;
91 /* -1 since #line is the number of the next line */
92 srcpos_set_line(xstrdup(fn), atoi(line) - 1);
93 }
94
David Gibsona4da2e32007-12-18 15:06:42 +110095<*><<EOF>> {
96 if (!pop_input_file()) {
97 yyterminate();
98 }
99 }
100
David Gibsoned95d742008-08-07 12:24:17 +1000101<*>{STRING} {
David Gibsona4da2e32007-12-18 15:06:42 +1100102 DPRINT("String: %s\n", yytext);
103 yylval.data = data_copy_escape_string(yytext+1,
104 yyleng-2);
David Gibsona4da2e32007-12-18 15:06:42 +1100105 return DT_STRING;
106 }
107
108<*>"/dts-v1/" {
David Gibsona4da2e32007-12-18 15:06:42 +1100109 DPRINT("Keyword: /dts-v1/\n");
110 dts_version = 1;
111 BEGIN_DEFAULT();
112 return DT_V1;
113 }
114
115<*>"/memreserve/" {
David Gibsona4da2e32007-12-18 15:06:42 +1100116 DPRINT("Keyword: /memreserve/\n");
117 BEGIN_DEFAULT();
118 return DT_MEMRESERVE;
119 }
120
Stephen Warrencd296722012-09-28 21:25:59 +0000121<*>"/bits/" {
122 DPRINT("Keyword: /bits/\n");
123 BEGIN_DEFAULT();
124 return DT_BITS;
125 }
126
127<*>"/delete-property/" {
128 DPRINT("Keyword: /delete-property/\n");
129 DPRINT("<PROPNODENAME>\n");
130 BEGIN(PROPNODENAME);
131 return DT_DEL_PROP;
132 }
133
134<*>"/delete-node/" {
135 DPRINT("Keyword: /delete-node/\n");
136 DPRINT("<PROPNODENAME>\n");
137 BEGIN(PROPNODENAME);
138 return DT_DEL_NODE;
139 }
140
David Gibsona4da2e32007-12-18 15:06:42 +1100141<*>{LABEL}: {
David Gibsona4da2e32007-12-18 15:06:42 +1100142 DPRINT("Label: %s\n", yytext);
John Bonesio658f29a2010-11-17 15:28:20 -0800143 yylval.labelref = xstrdup(yytext);
David Gibsona4da2e32007-12-18 15:06:42 +1100144 yylval.labelref[yyleng-1] = '\0';
145 return DT_LABEL;
146 }
147
Stephen Warrencd296722012-09-28 21:25:59 +0000148<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
John Bonesio658f29a2010-11-17 15:28:20 -0800149 yylval.literal = xstrdup(yytext);
David Gibsona4da2e32007-12-18 15:06:42 +1100150 DPRINT("Literal: '%s'\n", yylval.literal);
151 return DT_LITERAL;
152 }
153
Stephen Warrencd296722012-09-28 21:25:59 +0000154<*>{CHAR_LITERAL} {
155 yytext[yyleng-1] = '\0';
156 yylval.literal = xstrdup(yytext+1);
157 DPRINT("Character literal: %s\n", yylval.literal);
158 return DT_CHAR_LITERAL;
159 }
160
John Bonesio658f29a2010-11-17 15:28:20 -0800161<*>\&{LABEL} { /* label reference */
David Gibsona4da2e32007-12-18 15:06:42 +1100162 DPRINT("Ref: %s\n", yytext+1);
John Bonesio658f29a2010-11-17 15:28:20 -0800163 yylval.labelref = xstrdup(yytext+1);
David Gibsona4da2e32007-12-18 15:06:42 +1100164 return DT_REF;
165 }
166
John Bonesio658f29a2010-11-17 15:28:20 -0800167<*>"&{/"{PATHCHAR}+\} { /* new-style path reference */
David Gibsona4da2e32007-12-18 15:06:42 +1100168 yytext[yyleng-1] = '\0';
169 DPRINT("Ref: %s\n", yytext+2);
John Bonesio658f29a2010-11-17 15:28:20 -0800170 yylval.labelref = xstrdup(yytext+2);
David Gibsona4da2e32007-12-18 15:06:42 +1100171 return DT_REF;
172 }
173
174<BYTESTRING>[0-9a-fA-F]{2} {
David Gibsona4da2e32007-12-18 15:06:42 +1100175 yylval.byte = strtol(yytext, NULL, 16);
176 DPRINT("Byte: %02x\n", (int)yylval.byte);
177 return DT_BYTE;
178 }
179
180<BYTESTRING>"]" {
David Gibsona4da2e32007-12-18 15:06:42 +1100181 DPRINT("/BYTESTRING\n");
182 BEGIN_DEFAULT();
183 return ']';
184 }
185
Stephen Warrencd296722012-09-28 21:25:59 +0000186<PROPNODENAME>\\?{PROPNODECHAR}+ {
David Gibsona4da2e32007-12-18 15:06:42 +1100187 DPRINT("PropNodeName: %s\n", yytext);
Stephen Warrencd296722012-09-28 21:25:59 +0000188 yylval.propnodename = xstrdup((yytext[0] == '\\') ?
189 yytext + 1 : yytext);
David Gibsona4da2e32007-12-18 15:06:42 +1100190 BEGIN_DEFAULT();
191 return DT_PROPNODENAME;
192 }
193
David Gibsoned95d742008-08-07 12:24:17 +1000194"/incbin/" {
David Gibsoned95d742008-08-07 12:24:17 +1000195 DPRINT("Binary Include\n");
196 return DT_INCBIN;
David Gibsona4da2e32007-12-18 15:06:42 +1100197 }
198
David Gibsoned95d742008-08-07 12:24:17 +1000199<*>{WS}+ /* eat whitespace */
200<*>{COMMENT}+ /* eat C-style comments */
201<*>{LINECOMMENT}+ /* eat C++-style comments */
David Gibsona4da2e32007-12-18 15:06:42 +1100202
Stephen Warrencd296722012-09-28 21:25:59 +0000203<*>"<<" { return DT_LSHIFT; };
204<*>">>" { return DT_RSHIFT; };
205<*>"<=" { return DT_LE; };
206<*>">=" { return DT_GE; };
207<*>"==" { return DT_EQ; };
208<*>"!=" { return DT_NE; };
209<*>"&&" { return DT_AND; };
210<*>"||" { return DT_OR; };
211
David Gibsona4da2e32007-12-18 15:06:42 +1100212<*>. {
David Gibsona4da2e32007-12-18 15:06:42 +1100213 DPRINT("Char: %c (\\x%02x)\n", yytext[0],
214 (unsigned)yytext[0]);
215 if (yytext[0] == '[') {
216 DPRINT("<BYTESTRING>\n");
217 BEGIN(BYTESTRING);
218 }
219 if ((yytext[0] == '{')
220 || (yytext[0] == ';')) {
221 DPRINT("<PROPNODENAME>\n");
222 BEGIN(PROPNODENAME);
223 }
224 return yytext[0];
225 }
226
227%%
228
David Gibsoned95d742008-08-07 12:24:17 +1000229static void push_input_file(const char *filename)
David Gibsona4da2e32007-12-18 15:06:42 +1100230{
David Gibsoned95d742008-08-07 12:24:17 +1000231 assert(filename);
232
John Bonesio658f29a2010-11-17 15:28:20 -0800233 srcfile_push(filename);
David Gibsoned95d742008-08-07 12:24:17 +1000234
John Bonesio658f29a2010-11-17 15:28:20 -0800235 yyin = current_srcfile->f;
David Gibsona4da2e32007-12-18 15:06:42 +1100236
John Bonesio658f29a2010-11-17 15:28:20 -0800237 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
David Gibsona4da2e32007-12-18 15:06:42 +1100238}
239
240
David Gibsoned95d742008-08-07 12:24:17 +1000241static int pop_input_file(void)
David Gibsona4da2e32007-12-18 15:06:42 +1100242{
John Bonesio658f29a2010-11-17 15:28:20 -0800243 if (srcfile_pop() == 0)
David Gibsona4da2e32007-12-18 15:06:42 +1100244 return 0;
245
John Bonesio658f29a2010-11-17 15:28:20 -0800246 yypop_buffer_state();
247 yyin = current_srcfile->f;
David Gibsona4da2e32007-12-18 15:06:42 +1100248
David Gibsona4da2e32007-12-18 15:06:42 +1100249 return 1;
250}