mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
2c5925d6b7
Consider structures, unions and enums defined in the source file as internal and do not expand them. This way, changes to e.g. struct serial_private in drivers/tty/serial/8250_pci.c will not affect the checksum of the pciserial_* exports.
436 lines
8.6 KiB
Plaintext
436 lines
8.6 KiB
Plaintext
/* Lexical analysis for genksyms.
|
|
Copyright 1996, 1997 Linux International.
|
|
|
|
New implementation contributed by Richard Henderson <rth@tamu.edu>
|
|
Based on original work by Bjorn Ekwall <bj0rn@blox.se>
|
|
|
|
Taken from Linux modutils 2.4.22.
|
|
|
|
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. */
|
|
|
|
|
|
%{
|
|
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include "genksyms.h"
|
|
#include "parse.tab.h"
|
|
|
|
/* We've got a two-level lexer here. We let flex do basic tokenization
|
|
and then we categorize those basic tokens in the second stage. */
|
|
#define YY_DECL static int yylex1(void)
|
|
|
|
%}
|
|
|
|
IDENT [A-Za-z_\$][A-Za-z0-9_\$]*
|
|
|
|
O_INT 0[0-7]*
|
|
D_INT [1-9][0-9]*
|
|
X_INT 0[Xx][0-9A-Fa-f]+
|
|
I_SUF [Uu]|[Ll]|[Uu][Ll]|[Ll][Uu]
|
|
INT ({O_INT}|{D_INT}|{X_INT}){I_SUF}?
|
|
|
|
FRAC ([0-9]*\.[0-9]+)|([0-9]+\.)
|
|
EXP [Ee][+-]?[0-9]+
|
|
F_SUF [FfLl]
|
|
REAL ({FRAC}{EXP}?{F_SUF}?)|([0-9]+{EXP}{F_SUF}?)
|
|
|
|
STRING L?\"([^\\\"]*\\.)*[^\\\"]*\"
|
|
CHAR L?\'([^\\\']*\\.)*[^\\\']*\'
|
|
|
|
MC_TOKEN ([~%^&*+=|<>/-]=)|(&&)|("||")|(->)|(<<)|(>>)
|
|
|
|
/* We don't do multiple input files. */
|
|
%option noyywrap
|
|
|
|
%option noinput
|
|
|
|
%%
|
|
|
|
|
|
/* Keep track of our location in the original source files. */
|
|
^#[ \t]+{INT}[ \t]+\"[^\"\n]+\".*\n return FILENAME;
|
|
^#.*\n cur_line++;
|
|
\n cur_line++;
|
|
|
|
/* Ignore all other whitespace. */
|
|
[ \t\f\v\r]+ ;
|
|
|
|
|
|
{STRING} return STRING;
|
|
{CHAR} return CHAR;
|
|
{IDENT} return IDENT;
|
|
|
|
/* The Pedant requires that the other C multi-character tokens be
|
|
recognized as tokens. We don't actually use them since we don't
|
|
parse expressions, but we do want whitespace to be arranged
|
|
around them properly. */
|
|
{MC_TOKEN} return OTHER;
|
|
{INT} return INT;
|
|
{REAL} return REAL;
|
|
|
|
"..." return DOTS;
|
|
|
|
/* All other tokens are single characters. */
|
|
. return yytext[0];
|
|
|
|
|
|
%%
|
|
|
|
/* Bring in the keyword recognizer. */
|
|
|
|
#include "keywords.hash.c"
|
|
|
|
|
|
/* Macros to append to our phrase collection list. */
|
|
|
|
/*
|
|
* We mark any token, that that equals to a known enumerator, as
|
|
* SYM_ENUM_CONST. The parser will change this for struct and union tags later,
|
|
* the only problem is struct and union members:
|
|
* enum e { a, b }; struct s { int a, b; }
|
|
* but in this case, the only effect will be, that the ABI checksums become
|
|
* more volatile, which is acceptable. Also, such collisions are quite rare,
|
|
* so far it was only observed in include/linux/telephony.h.
|
|
*/
|
|
#define _APP(T,L) do { \
|
|
cur_node = next_node; \
|
|
next_node = xmalloc(sizeof(*next_node)); \
|
|
next_node->next = cur_node; \
|
|
cur_node->string = memcpy(xmalloc(L+1), T, L+1); \
|
|
cur_node->tag = \
|
|
find_symbol(cur_node->string, SYM_ENUM_CONST, 1)?\
|
|
SYM_ENUM_CONST : SYM_NORMAL ; \
|
|
cur_node->in_source_file = in_source_file; \
|
|
} while (0)
|
|
|
|
#define APP _APP(yytext, yyleng)
|
|
|
|
|
|
/* The second stage lexer. Here we incorporate knowledge of the state
|
|
of the parser to tailor the tokens that are returned. */
|
|
|
|
int
|
|
yylex(void)
|
|
{
|
|
static enum {
|
|
ST_NOTSTARTED, ST_NORMAL, ST_ATTRIBUTE, ST_ASM, ST_BRACKET, ST_BRACE,
|
|
ST_EXPRESSION, ST_TABLE_1, ST_TABLE_2, ST_TABLE_3, ST_TABLE_4,
|
|
ST_TABLE_5, ST_TABLE_6
|
|
} lexstate = ST_NOTSTARTED;
|
|
|
|
static int suppress_type_lookup, dont_want_brace_phrase;
|
|
static struct string_list *next_node;
|
|
|
|
int token, count = 0;
|
|
struct string_list *cur_node;
|
|
|
|
if (lexstate == ST_NOTSTARTED)
|
|
{
|
|
next_node = xmalloc(sizeof(*next_node));
|
|
next_node->next = NULL;
|
|
lexstate = ST_NORMAL;
|
|
}
|
|
|
|
repeat:
|
|
token = yylex1();
|
|
|
|
if (token == 0)
|
|
return 0;
|
|
else if (token == FILENAME)
|
|
{
|
|
char *file, *e;
|
|
|
|
/* Save the filename and line number for later error messages. */
|
|
|
|
if (cur_filename)
|
|
free(cur_filename);
|
|
|
|
file = strchr(yytext, '\"')+1;
|
|
e = strchr(file, '\"');
|
|
*e = '\0';
|
|
cur_filename = memcpy(xmalloc(e-file+1), file, e-file+1);
|
|
cur_line = atoi(yytext+2);
|
|
|
|
if (!source_file) {
|
|
source_file = xstrdup(cur_filename);
|
|
in_source_file = 1;
|
|
} else {
|
|
in_source_file = (strcmp(cur_filename, source_file) == 0);
|
|
}
|
|
|
|
goto repeat;
|
|
}
|
|
|
|
switch (lexstate)
|
|
{
|
|
case ST_NORMAL:
|
|
switch (token)
|
|
{
|
|
case IDENT:
|
|
APP;
|
|
{
|
|
const struct resword *r = is_reserved_word(yytext, yyleng);
|
|
if (r)
|
|
{
|
|
switch (token = r->token)
|
|
{
|
|
case ATTRIBUTE_KEYW:
|
|
lexstate = ST_ATTRIBUTE;
|
|
count = 0;
|
|
goto repeat;
|
|
case ASM_KEYW:
|
|
lexstate = ST_ASM;
|
|
count = 0;
|
|
goto repeat;
|
|
|
|
case STRUCT_KEYW:
|
|
case UNION_KEYW:
|
|
case ENUM_KEYW:
|
|
dont_want_brace_phrase = 3;
|
|
suppress_type_lookup = 2;
|
|
goto fini;
|
|
|
|
case EXPORT_SYMBOL_KEYW:
|
|
goto fini;
|
|
}
|
|
}
|
|
if (!suppress_type_lookup)
|
|
{
|
|
if (find_symbol(yytext, SYM_TYPEDEF, 1))
|
|
token = TYPE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '[':
|
|
APP;
|
|
lexstate = ST_BRACKET;
|
|
count = 1;
|
|
goto repeat;
|
|
|
|
case '{':
|
|
APP;
|
|
if (dont_want_brace_phrase)
|
|
break;
|
|
lexstate = ST_BRACE;
|
|
count = 1;
|
|
goto repeat;
|
|
|
|
case '=': case ':':
|
|
APP;
|
|
lexstate = ST_EXPRESSION;
|
|
break;
|
|
|
|
case DOTS:
|
|
default:
|
|
APP;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ST_ATTRIBUTE:
|
|
APP;
|
|
switch (token)
|
|
{
|
|
case '(':
|
|
++count;
|
|
goto repeat;
|
|
case ')':
|
|
if (--count == 0)
|
|
{
|
|
lexstate = ST_NORMAL;
|
|
token = ATTRIBUTE_PHRASE;
|
|
break;
|
|
}
|
|
goto repeat;
|
|
default:
|
|
goto repeat;
|
|
}
|
|
break;
|
|
|
|
case ST_ASM:
|
|
APP;
|
|
switch (token)
|
|
{
|
|
case '(':
|
|
++count;
|
|
goto repeat;
|
|
case ')':
|
|
if (--count == 0)
|
|
{
|
|
lexstate = ST_NORMAL;
|
|
token = ASM_PHRASE;
|
|
break;
|
|
}
|
|
goto repeat;
|
|
default:
|
|
goto repeat;
|
|
}
|
|
break;
|
|
|
|
case ST_BRACKET:
|
|
APP;
|
|
switch (token)
|
|
{
|
|
case '[':
|
|
++count;
|
|
goto repeat;
|
|
case ']':
|
|
if (--count == 0)
|
|
{
|
|
lexstate = ST_NORMAL;
|
|
token = BRACKET_PHRASE;
|
|
break;
|
|
}
|
|
goto repeat;
|
|
default:
|
|
goto repeat;
|
|
}
|
|
break;
|
|
|
|
case ST_BRACE:
|
|
APP;
|
|
switch (token)
|
|
{
|
|
case '{':
|
|
++count;
|
|
goto repeat;
|
|
case '}':
|
|
if (--count == 0)
|
|
{
|
|
lexstate = ST_NORMAL;
|
|
token = BRACE_PHRASE;
|
|
break;
|
|
}
|
|
goto repeat;
|
|
default:
|
|
goto repeat;
|
|
}
|
|
break;
|
|
|
|
case ST_EXPRESSION:
|
|
switch (token)
|
|
{
|
|
case '(': case '[': case '{':
|
|
++count;
|
|
APP;
|
|
goto repeat;
|
|
case '}':
|
|
/* is this the last line of an enum declaration? */
|
|
if (count == 0)
|
|
{
|
|
/* Put back the token we just read so's we can find it again
|
|
after registering the expression. */
|
|
unput(token);
|
|
|
|
lexstate = ST_NORMAL;
|
|
token = EXPRESSION_PHRASE;
|
|
break;
|
|
}
|
|
/* FALLTHRU */
|
|
case ')': case ']':
|
|
--count;
|
|
APP;
|
|
goto repeat;
|
|
case ',': case ';':
|
|
if (count == 0)
|
|
{
|
|
/* Put back the token we just read so's we can find it again
|
|
after registering the expression. */
|
|
unput(token);
|
|
|
|
lexstate = ST_NORMAL;
|
|
token = EXPRESSION_PHRASE;
|
|
break;
|
|
}
|
|
APP;
|
|
goto repeat;
|
|
default:
|
|
APP;
|
|
goto repeat;
|
|
}
|
|
break;
|
|
|
|
case ST_TABLE_1:
|
|
goto repeat;
|
|
|
|
case ST_TABLE_2:
|
|
if (token == IDENT && yyleng == 1 && yytext[0] == 'X')
|
|
{
|
|
token = EXPORT_SYMBOL_KEYW;
|
|
lexstate = ST_TABLE_5;
|
|
APP;
|
|
break;
|
|
}
|
|
lexstate = ST_TABLE_6;
|
|
/* FALLTHRU */
|
|
|
|
case ST_TABLE_6:
|
|
switch (token)
|
|
{
|
|
case '{': case '[': case '(':
|
|
++count;
|
|
break;
|
|
case '}': case ']': case ')':
|
|
--count;
|
|
break;
|
|
case ',':
|
|
if (count == 0)
|
|
lexstate = ST_TABLE_2;
|
|
break;
|
|
};
|
|
goto repeat;
|
|
|
|
case ST_TABLE_3:
|
|
goto repeat;
|
|
|
|
case ST_TABLE_4:
|
|
if (token == ';')
|
|
lexstate = ST_NORMAL;
|
|
goto repeat;
|
|
|
|
case ST_TABLE_5:
|
|
switch (token)
|
|
{
|
|
case ',':
|
|
token = ';';
|
|
lexstate = ST_TABLE_2;
|
|
APP;
|
|
break;
|
|
default:
|
|
APP;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
exit(1);
|
|
}
|
|
fini:
|
|
|
|
if (suppress_type_lookup > 0)
|
|
--suppress_type_lookup;
|
|
if (dont_want_brace_phrase > 0)
|
|
--dont_want_brace_phrase;
|
|
|
|
yylval = &next_node->next;
|
|
|
|
return token;
|
|
}
|