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SmartisanOS_Kernel_Source/scripts/dtc/dtc-lexer.l at master · ActiveProgram/SmartisanOS_Kernel_Source · GitHub
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dtc-lexer.l
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/*
* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
%option noyywrap nounput noinput never-interactive
%x
INCLUDE
%x
BYTESTRING
%x
PROPNODENAME
%s
V1
PROPNODECHAR
[a-zA-
Z0
-
9
,._+*#?@-]
PATHCHAR
({
PROPNODECHAR
}|[/])
LABEL
[a-zA-
Z_
][a-zA-
Z0
-9_]*
STRING
\
"
([^
\\
"
]|\\.)*\
"
CHAR_LITERAL '([^']|
\\
')*'
WS [[:space:]]
COMMENT
"
/*"([^*]|\*+[^*/
])*\*+
"
/
"
LINECOMMENT
"
//
"
.*\n
%{
#
include
"
dtc.h
"
#
include
"
srcpos.h
"
#
include
"
dtc-parser.tab.h
"
YYLTYPE
yylloc;
/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
#
define
YY_USER_ACTION
\
{ \
srcpos_update
(&yylloc, yytext, yyleng); \
}
/*#define LEXDEBUG 1*/
#
ifdef
LEXDEBUG
#
define
DPRINT
(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
#
else
#
define
DPRINT
(fmt, ...)
do
{ }
while
(
0
)
#
endif
static
int
dts_version =
1
;
#
define
BEGIN_DEFAULT
()
DPRINT
(
"
<V1>
\n
"
); \
BEGIN
(
V1
); \
static
void
push_input_file
(
const
char
*filename);
static
int
pop_input_file
(
void
);
%}
%%
<
*
>
"
/include/
"
{
WS
}
*
{
STRING
} {
char
*name =
strchr
(yytext,
'
\"
'
) +
1
;
yytext[yyleng-
1
] =
'
\0
'
;
push_input_file
(name);
}
<
*
>
^
"
#
"
(line)
?
{
WS
}
+
[
0
-
9
]
+
{
WS
}
+
{
STRING
}({
WS
}
+
[
0
-
9
]
+
)
?
{
char
*line, *tmp, *fn;
/* skip text before line # */
line = yytext;
while
(!
isdigit
(*line))
line++;
/* skip digits in line # */
tmp = line;
while
(!
isspace
(*tmp))
tmp++;
/* "NULL"-terminate line # */
*tmp =
'
\0
'
;
/* start of filename */
fn =
strchr
(tmp +
1
,
'
"
'
) +
1
;
/* strip trailing " from filename */
tmp =
strchr
(fn,
'
"
'
);
*tmp =
0
;
/* -1 since #line is the number of the next line */
srcpos_set_line
(
xstrdup
(fn),
atoi
(line) -
1
);
}
<
*
>
<<EOF>>
{
if
(!
pop_input_file
()) {
yyterminate
();
}
}
<
*
>{
STRING
} {
DPRINT
(
"
String: %s
\n
"
, yytext);
yylval.
data
=
data_copy_escape_string
(yytext+
1
,
yyleng-
2
);
return
DT_STRING
;
}
<
*
>
"
/dts-v1/
"
{
DPRINT
(
"
Keyword: /dts-v1/
\n
"
);
dts_version =
1
;
BEGIN_DEFAULT
();
return
DT_V1
;
}
<
*
>
"
/memreserve/
"
{
DPRINT
(
"
Keyword: /memreserve/
\n
"
);
BEGIN_DEFAULT
();
return
DT_MEMRESERVE
;
}
<
*
>
"
/bits/
"
{
DPRINT
(
"
Keyword: /bits/
\n
"
);
BEGIN_DEFAULT
();
return
DT_BITS
;
}
<
*
>
"
/delete-property/
"
{
DPRINT
(
"
Keyword: /delete-property/
\n
"
);
DPRINT
(
"
<PROPNODENAME>
\n
"
);
BEGIN
(
PROPNODENAME
);
return
DT_DEL_PROP
;
}
<
*
>
"
/delete-node/
"
{
DPRINT
(
"
Keyword: /delete-node/
\n
"
);
DPRINT
(
"
<PROPNODENAME>
\n
"
);
BEGIN
(
PROPNODENAME
);
return
DT_DEL_NODE
;
}
<
*
>{
LABEL
}: {
DPRINT
(
"
Label: %s
\n
"
, yytext);
yylval.
labelref
=
xstrdup
(yytext);
yylval.
labelref
[yyleng-
1
] =
'
\0
'
;
return
DT_LABEL
;
}
<
V1
>([
0
-
9
]
+
|
0[
xX
][
0
-
9a
-
fA
-
F
]
+
)(U
|
L
|
UL
|
LL
|
ULL)
?
{
yylval.
literal
=
xstrdup
(yytext);
DPRINT
(
"
Literal: '%s'
\n
"
, yylval.
literal
);
return
DT_LITERAL
;
}
<
*
>{
CHAR_LITERAL
} {
yytext[yyleng-
1
] =
'
\0
'
;
yylval.
literal
=
xstrdup
(yytext+
1
);
DPRINT
(
"
Character literal: %s
\n
"
, yylval.
literal
);
return
DT_CHAR_LITERAL
;
}
<
*
>
\&
{
LABEL
} {
/* label reference */
DPRINT
(
"
Ref: %s
\n
"
, yytext+
1
);
yylval.
labelref
=
xstrdup
(yytext+
1
);
return
DT_REF
;
}
<
*
>
"
&{/
"
{
PATHCHAR
}
+
\}
{
/* new-style path reference */
yytext[yyleng-
1
] =
'
\0
'
;
DPRINT
(
"
Ref: %s
\n
"
, yytext+
2
);
yylval.
labelref
=
xstrdup
(yytext+
2
);
return
DT_REF
;
}
<
BYTESTRING
>[
0
-
9a
-
fA
-
F
]{
2
} {
yylval.
byte
=
strtol
(yytext,
NULL
,
16
);
DPRINT
(
"
Byte: %02x
\n
"
, (
int
)yylval.
byte
);
return
DT_BYTE
;
}
<
BYTESTRING
>
"
]
"
{
DPRINT
(
"
/BYTESTRING
\n
"
);
BEGIN_DEFAULT
();
return
'
]
'
;
}
<
PROPNODENAME
>
\\
?
{
PROPNODECHAR
}
+
{
DPRINT
(
"
PropNodeName: %s
\n
"
, yytext);
yylval.
propnodename
=
xstrdup
((yytext[
0
] ==
'
\\
'
) ?
yytext +
1
: yytext);
BEGIN_DEFAULT
();
return
DT_PROPNODENAME
;
}
"
/incbin/
"
{
DPRINT
(
"
Binary Include
\n
"
);
return
DT_INCBIN
;
}
<
*
>{
WS
}
+
/* eat whitespace */
<
*
>{
COMMENT
}
+
/* eat C-style comments */
<
*
>{
LINECOMMENT
}
+
/* eat C++-style comments */
<
*
>
"
<<
"
{
return
DT_LSHIFT
; };
<
*
>
"
>>
"
{
return
DT_RSHIFT
; };
<
*
>
"
<=
"
{
return
DT_LE
; };
<
*
>
"
>=
"
{
return
DT_GE
; };
<
*
>
"
==
"
{
return
DT_EQ
; };
<
*
>
"
!=
"
{
return
DT_NE
; };
<
*
>
"
&&
"
{
return
DT_AND
; };
<
*
>
"
||
"
{
return
DT_OR
; };
<
*
>
.
{
DPRINT
(
"
Char: %c (
\\
x%02x)
\n
"
, yytext[
0
],
(
unsigned
)yytext[
0
]);
if
(yytext[
0
] ==
'
[
'
) {
DPRINT
(
"
<BYTESTRING>
\n
"
);
BEGIN
(
BYTESTRING
);
}
if
((yytext[
0
] ==
'
{
'
)
|| (yytext[
0
] ==
'
;
'
)) {
DPRINT
(
"
<PROPNODENAME>
\n
"
);
BEGIN
(
PROPNODENAME
);
}
return
yytext[
0
];
}
%%
static
void
push_input_file
(
const
char
*filename)
{
assert
(filename);
srcfile_push
(filename);
yyin = current_srcfile->
f
;
yypush_buffer_state
(
yy_create_buffer
(yyin,
YY_BUF_SIZE
));
}
static
int
pop_input_file
(
void
)
{
if
(
srcfile_pop
() ==
0
)
return
0
;
yypop_buffer_state
();
yyin = current_srcfile->
f
;
return
1
;
}
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