Loading...
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6%option noyywrap nounput noinput never-interactive
7
8%x BYTESTRING
9%x PROPNODENAME
10%s V1
11
12PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
13PATHCHAR ({PROPNODECHAR}|[/])
14LABEL [a-zA-Z_][a-zA-Z0-9_]*
15STRING \"([^\\"]|\\.)*\"
16CHAR_LITERAL '([^']|\\')*'
17WS [[:space:]]
18COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
19LINECOMMENT "//".*\n
20
21%{
22#include "dtc.h"
23#include "srcpos.h"
24#include "dtc-parser.tab.h"
25
26extern bool treesource_error;
27
28/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
29#define YY_USER_ACTION \
30 { \
31 srcpos_update(&yylloc, yytext, yyleng); \
32 }
33
34/*#define LEXDEBUG 1*/
35
36#ifdef LEXDEBUG
37#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
38#else
39#define DPRINT(fmt, ...) do { } while (0)
40#endif
41
42static int dts_version = 1;
43
44#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
45 BEGIN(V1); \
46
47static void push_input_file(const char *filename);
48static bool pop_input_file(void);
49static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
50
51%}
52
53%%
54<*>"/include/"{WS}*{STRING} {
55 char *name = strchr(yytext, '\"') + 1;
56 yytext[yyleng-1] = '\0';
57 push_input_file(name);
58 }
59
60<*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)* {
61 char *line, *fnstart, *fnend;
62 struct data fn;
63 /* skip text before line # */
64 line = yytext;
65 while (!isdigit((unsigned char)*line))
66 line++;
67
68 /* regexp ensures that first and list "
69 * in the whole yytext are those at
70 * beginning and end of the filename string */
71 fnstart = memchr(yytext, '"', yyleng);
72 for (fnend = yytext + yyleng - 1;
73 *fnend != '"'; fnend--)
74 ;
75 assert(fnstart && fnend && (fnend > fnstart));
76
77 fn = data_copy_escape_string(fnstart + 1,
78 fnend - fnstart - 1);
79
80 /* Don't allow nuls in filenames */
81 if (memchr(fn.val, '\0', fn.len - 1))
82 lexical_error("nul in line number directive");
83
84 /* -1 since #line is the number of the next line */
85 srcpos_set_line(xstrdup(fn.val), atoi(line) - 1);
86 data_free(fn);
87 }
88
89<*><<EOF>> {
90 if (!pop_input_file()) {
91 yyterminate();
92 }
93 }
94
95<*>{STRING} {
96 DPRINT("String: %s\n", yytext);
97 yylval.data = data_copy_escape_string(yytext+1,
98 yyleng-2);
99 return DT_STRING;
100 }
101
102<*>"/dts-v1/" {
103 DPRINT("Keyword: /dts-v1/\n");
104 dts_version = 1;
105 BEGIN_DEFAULT();
106 return DT_V1;
107 }
108
109<*>"/plugin/" {
110 DPRINT("Keyword: /plugin/\n");
111 return DT_PLUGIN;
112 }
113
114<*>"/memreserve/" {
115 DPRINT("Keyword: /memreserve/\n");
116 BEGIN_DEFAULT();
117 return DT_MEMRESERVE;
118 }
119
120<*>"/bits/" {
121 DPRINT("Keyword: /bits/\n");
122 BEGIN_DEFAULT();
123 return DT_BITS;
124 }
125
126<*>"/delete-property/" {
127 DPRINT("Keyword: /delete-property/\n");
128 DPRINT("<PROPNODENAME>\n");
129 BEGIN(PROPNODENAME);
130 return DT_DEL_PROP;
131 }
132
133<*>"/delete-node/" {
134 DPRINT("Keyword: /delete-node/\n");
135 DPRINT("<PROPNODENAME>\n");
136 BEGIN(PROPNODENAME);
137 return DT_DEL_NODE;
138 }
139
140<*>"/omit-if-no-ref/" {
141 DPRINT("Keyword: /omit-if-no-ref/\n");
142 DPRINT("<PROPNODENAME>\n");
143 BEGIN(PROPNODENAME);
144 return DT_OMIT_NO_REF;
145 }
146
147<*>{LABEL}: {
148 DPRINT("Label: %s\n", yytext);
149 yylval.labelref = xstrdup(yytext);
150 yylval.labelref[yyleng-1] = '\0';
151 return DT_LABEL;
152 }
153
154<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
155 char *e;
156 DPRINT("Integer Literal: '%s'\n", yytext);
157
158 errno = 0;
159 yylval.integer = strtoull(yytext, &e, 0);
160
161 if (*e && e[strspn(e, "UL")]) {
162 lexical_error("Bad integer literal '%s'",
163 yytext);
164 }
165
166 if (errno == ERANGE)
167 lexical_error("Integer literal '%s' out of range",
168 yytext);
169 else
170 /* ERANGE is the only strtoull error triggerable
171 * by strings matching the pattern */
172 assert(errno == 0);
173 return DT_LITERAL;
174 }
175
176<*>{CHAR_LITERAL} {
177 struct data d;
178 DPRINT("Character literal: %s\n", yytext);
179
180 d = data_copy_escape_string(yytext+1, yyleng-2);
181 if (d.len == 1) {
182 lexical_error("Empty character literal");
183 yylval.integer = 0;
184 } else {
185 yylval.integer = (unsigned char)d.val[0];
186
187 if (d.len > 2)
188 lexical_error("Character literal has %d"
189 " characters instead of 1",
190 d.len - 1);
191 }
192
193 data_free(d);
194 return DT_CHAR_LITERAL;
195 }
196
197<*>\&{LABEL} { /* label reference */
198 DPRINT("Ref: %s\n", yytext+1);
199 yylval.labelref = xstrdup(yytext+1);
200 return DT_LABEL_REF;
201 }
202
203<*>"&{"{PATHCHAR}*\} { /* new-style path reference */
204 yytext[yyleng-1] = '\0';
205 DPRINT("Ref: %s\n", yytext+2);
206 yylval.labelref = xstrdup(yytext+2);
207 return DT_PATH_REF;
208 }
209
210<BYTESTRING>[0-9a-fA-F]{2} {
211 yylval.byte = strtol(yytext, NULL, 16);
212 DPRINT("Byte: %02x\n", (int)yylval.byte);
213 return DT_BYTE;
214 }
215
216<BYTESTRING>"]" {
217 DPRINT("/BYTESTRING\n");
218 BEGIN_DEFAULT();
219 return ']';
220 }
221
222<PROPNODENAME>\\?{PROPNODECHAR}+ {
223 DPRINT("PropNodeName: %s\n", yytext);
224 yylval.propnodename = xstrdup((yytext[0] == '\\') ?
225 yytext + 1 : yytext);
226 BEGIN_DEFAULT();
227 return DT_PROPNODENAME;
228 }
229
230"/incbin/" {
231 DPRINT("Binary Include\n");
232 return DT_INCBIN;
233 }
234
235<*>{WS}+ /* eat whitespace */
236<*>{COMMENT}+ /* eat C-style comments */
237<*>{LINECOMMENT}+ /* eat C++-style comments */
238
239<*>"<<" { return DT_LSHIFT; };
240<*>">>" { return DT_RSHIFT; };
241<*>"<=" { return DT_LE; };
242<*>">=" { return DT_GE; };
243<*>"==" { return DT_EQ; };
244<*>"!=" { return DT_NE; };
245<*>"&&" { return DT_AND; };
246<*>"||" { return DT_OR; };
247
248<*>. {
249 DPRINT("Char: %c (\\x%02x)\n", yytext[0],
250 (unsigned)yytext[0]);
251 if (yytext[0] == '[') {
252 DPRINT("<BYTESTRING>\n");
253 BEGIN(BYTESTRING);
254 }
255 if ((yytext[0] == '{')
256 || (yytext[0] == ';')) {
257 DPRINT("<PROPNODENAME>\n");
258 BEGIN(PROPNODENAME);
259 }
260 return yytext[0];
261 }
262
263%%
264
265static void push_input_file(const char *filename)
266{
267 assert(filename);
268
269 srcfile_push(filename);
270
271 yyin = current_srcfile->f;
272
273 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
274}
275
276
277static bool pop_input_file(void)
278{
279 if (srcfile_pop() == 0)
280 return false;
281
282 yypop_buffer_state();
283 yyin = current_srcfile->f;
284
285 return true;
286}
287
288static void lexical_error(const char *fmt, ...)
289{
290 va_list ap;
291
292 va_start(ap, fmt);
293 srcpos_verror(&yylloc, "Lexical error", fmt, ap);
294 va_end(ap);
295
296 treesource_error = true;
297}
1/*
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
21%option noyywrap nounput noinput never-interactive
22
23%x BYTESTRING
24%x PROPNODENAME
25%s V1
26
27PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
28PATHCHAR ({PROPNODECHAR}|[/])
29LABEL [a-zA-Z_][a-zA-Z0-9_]*
30STRING \"([^\\"]|\\.)*\"
31CHAR_LITERAL '([^']|\\')*'
32WS [[:space:]]
33COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
34LINECOMMENT "//".*\n
35
36%{
37#include "dtc.h"
38#include "srcpos.h"
39#include "dtc-parser.tab.h"
40
41YYLTYPE yylloc;
42extern bool treesource_error;
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 }
49
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
58static int dts_version = 1;
59
60#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
61 BEGIN(V1); \
62
63static void push_input_file(const char *filename);
64static bool pop_input_file(void);
65static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
66
67%}
68
69%%
70<*>"/include/"{WS}*{STRING} {
71 char *name = strchr(yytext, '\"') + 1;
72 yytext[yyleng-1] = '\0';
73 push_input_file(name);
74 }
75
76<*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)? {
77 char *line, *fnstart, *fnend;
78 struct data fn;
79 /* skip text before line # */
80 line = yytext;
81 while (!isdigit((unsigned char)*line))
82 line++;
83
84 /* regexp ensures that first and list "
85 * in the whole yytext are those at
86 * beginning and end of the filename string */
87 fnstart = memchr(yytext, '"', yyleng);
88 for (fnend = yytext + yyleng - 1;
89 *fnend != '"'; fnend--)
90 ;
91 assert(fnstart && fnend && (fnend > fnstart));
92
93 fn = data_copy_escape_string(fnstart + 1,
94 fnend - fnstart - 1);
95
96 /* Don't allow nuls in filenames */
97 if (memchr(fn.val, '\0', fn.len - 1))
98 lexical_error("nul in line number directive");
99
100 /* -1 since #line is the number of the next line */
101 srcpos_set_line(xstrdup(fn.val), atoi(line) - 1);
102 data_free(fn);
103 }
104
105<*><<EOF>> {
106 if (!pop_input_file()) {
107 yyterminate();
108 }
109 }
110
111<*>{STRING} {
112 DPRINT("String: %s\n", yytext);
113 yylval.data = data_copy_escape_string(yytext+1,
114 yyleng-2);
115 return DT_STRING;
116 }
117
118<*>"/dts-v1/" {
119 DPRINT("Keyword: /dts-v1/\n");
120 dts_version = 1;
121 BEGIN_DEFAULT();
122 return DT_V1;
123 }
124
125<*>"/plugin/" {
126 DPRINT("Keyword: /plugin/\n");
127 return DT_PLUGIN;
128 }
129
130<*>"/memreserve/" {
131 DPRINT("Keyword: /memreserve/\n");
132 BEGIN_DEFAULT();
133 return DT_MEMRESERVE;
134 }
135
136<*>"/bits/" {
137 DPRINT("Keyword: /bits/\n");
138 BEGIN_DEFAULT();
139 return DT_BITS;
140 }
141
142<*>"/delete-property/" {
143 DPRINT("Keyword: /delete-property/\n");
144 DPRINT("<PROPNODENAME>\n");
145 BEGIN(PROPNODENAME);
146 return DT_DEL_PROP;
147 }
148
149<*>"/delete-node/" {
150 DPRINT("Keyword: /delete-node/\n");
151 DPRINT("<PROPNODENAME>\n");
152 BEGIN(PROPNODENAME);
153 return DT_DEL_NODE;
154 }
155
156<*>{LABEL}: {
157 DPRINT("Label: %s\n", yytext);
158 yylval.labelref = xstrdup(yytext);
159 yylval.labelref[yyleng-1] = '\0';
160 return DT_LABEL;
161 }
162
163<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
164 char *e;
165 DPRINT("Integer Literal: '%s'\n", yytext);
166
167 errno = 0;
168 yylval.integer = strtoull(yytext, &e, 0);
169
170 if (*e && e[strspn(e, "UL")]) {
171 lexical_error("Bad integer literal '%s'",
172 yytext);
173 }
174
175 if (errno == ERANGE)
176 lexical_error("Integer literal '%s' out of range",
177 yytext);
178 else
179 /* ERANGE is the only strtoull error triggerable
180 * by strings matching the pattern */
181 assert(errno == 0);
182 return DT_LITERAL;
183 }
184
185<*>{CHAR_LITERAL} {
186 struct data d;
187 DPRINT("Character literal: %s\n", yytext);
188
189 d = data_copy_escape_string(yytext+1, yyleng-2);
190 if (d.len == 1) {
191 lexical_error("Empty character literal");
192 yylval.integer = 0;
193 } else {
194 yylval.integer = (unsigned char)d.val[0];
195
196 if (d.len > 2)
197 lexical_error("Character literal has %d"
198 " characters instead of 1",
199 d.len - 1);
200 }
201
202 data_free(d);
203 return DT_CHAR_LITERAL;
204 }
205
206<*>\&{LABEL} { /* label reference */
207 DPRINT("Ref: %s\n", yytext+1);
208 yylval.labelref = xstrdup(yytext+1);
209 return DT_REF;
210 }
211
212<*>"&{/"{PATHCHAR}*\} { /* new-style path reference */
213 yytext[yyleng-1] = '\0';
214 DPRINT("Ref: %s\n", yytext+2);
215 yylval.labelref = xstrdup(yytext+2);
216 return DT_REF;
217 }
218
219<BYTESTRING>[0-9a-fA-F]{2} {
220 yylval.byte = strtol(yytext, NULL, 16);
221 DPRINT("Byte: %02x\n", (int)yylval.byte);
222 return DT_BYTE;
223 }
224
225<BYTESTRING>"]" {
226 DPRINT("/BYTESTRING\n");
227 BEGIN_DEFAULT();
228 return ']';
229 }
230
231<PROPNODENAME>\\?{PROPNODECHAR}+ {
232 DPRINT("PropNodeName: %s\n", yytext);
233 yylval.propnodename = xstrdup((yytext[0] == '\\') ?
234 yytext + 1 : yytext);
235 BEGIN_DEFAULT();
236 return DT_PROPNODENAME;
237 }
238
239"/incbin/" {
240 DPRINT("Binary Include\n");
241 return DT_INCBIN;
242 }
243
244<*>{WS}+ /* eat whitespace */
245<*>{COMMENT}+ /* eat C-style comments */
246<*>{LINECOMMENT}+ /* eat C++-style comments */
247
248<*>"<<" { return DT_LSHIFT; };
249<*>">>" { return DT_RSHIFT; };
250<*>"<=" { return DT_LE; };
251<*>">=" { return DT_GE; };
252<*>"==" { return DT_EQ; };
253<*>"!=" { return DT_NE; };
254<*>"&&" { return DT_AND; };
255<*>"||" { return DT_OR; };
256
257<*>. {
258 DPRINT("Char: %c (\\x%02x)\n", yytext[0],
259 (unsigned)yytext[0]);
260 if (yytext[0] == '[') {
261 DPRINT("<BYTESTRING>\n");
262 BEGIN(BYTESTRING);
263 }
264 if ((yytext[0] == '{')
265 || (yytext[0] == ';')) {
266 DPRINT("<PROPNODENAME>\n");
267 BEGIN(PROPNODENAME);
268 }
269 return yytext[0];
270 }
271
272%%
273
274static void push_input_file(const char *filename)
275{
276 assert(filename);
277
278 srcfile_push(filename);
279
280 yyin = current_srcfile->f;
281
282 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
283}
284
285
286static bool pop_input_file(void)
287{
288 if (srcfile_pop() == 0)
289 return false;
290
291 yypop_buffer_state();
292 yyin = current_srcfile->f;
293
294 return true;
295}
296
297static void lexical_error(const char *fmt, ...)
298{
299 va_list ap;
300
301 va_start(ap, fmt);
302 srcpos_verror(&yylloc, "Lexical error", fmt, ap);
303 va_end(ap);
304
305 treesource_error = true;
306}