mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-29 05:55:02 +08:00
59a08b4b3b
Copy/paste leftover from recent refactor.
Fixes: 26226a9772 ("perf expr: Move expr lexer to flex")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200315155609.603948-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
115 lines
1.9 KiB
Plaintext
115 lines
1.9 KiB
Plaintext
%option prefix="expr_"
|
|
%option reentrant
|
|
%option bison-bridge
|
|
|
|
%{
|
|
#include <linux/compiler.h>
|
|
#include "expr.h"
|
|
#include "expr-bison.h"
|
|
|
|
char *expr_get_text(yyscan_t yyscanner);
|
|
YYSTYPE *expr_get_lval(yyscan_t yyscanner);
|
|
|
|
static int __value(YYSTYPE *yylval, char *str, int base, int token)
|
|
{
|
|
u64 num;
|
|
|
|
errno = 0;
|
|
num = strtoull(str, NULL, base);
|
|
if (errno)
|
|
return EXPR_ERROR;
|
|
|
|
yylval->num = num;
|
|
return token;
|
|
}
|
|
|
|
static int value(yyscan_t scanner, int base)
|
|
{
|
|
YYSTYPE *yylval = expr_get_lval(scanner);
|
|
char *text = expr_get_text(scanner);
|
|
|
|
return __value(yylval, text, base, NUMBER);
|
|
}
|
|
|
|
/*
|
|
* Allow @ instead of / to be able to specify pmu/event/ without
|
|
* conflicts with normal division.
|
|
*/
|
|
static char *normalize(char *str)
|
|
{
|
|
char *ret = str;
|
|
char *dst = str;
|
|
|
|
while (*str) {
|
|
if (*str == '@')
|
|
*dst++ = '/';
|
|
else if (*str == '\\')
|
|
*dst++ = *++str;
|
|
else
|
|
*dst++ = *str;
|
|
str++;
|
|
}
|
|
|
|
*dst = 0x0;
|
|
return ret;
|
|
}
|
|
|
|
static int str(yyscan_t scanner, int token)
|
|
{
|
|
YYSTYPE *yylval = expr_get_lval(scanner);
|
|
char *text = expr_get_text(scanner);
|
|
|
|
yylval->str = normalize(strdup(text));
|
|
if (!yylval->str)
|
|
return EXPR_ERROR;
|
|
|
|
yylval->str = normalize(yylval->str);
|
|
return token;
|
|
}
|
|
%}
|
|
|
|
number [0-9]+
|
|
|
|
sch [-,=]
|
|
spec \\{sch}
|
|
sym [0-9a-zA-Z_\.:@]+
|
|
symbol {spec}*{sym}*{spec}*{sym}*
|
|
|
|
%%
|
|
{
|
|
int start_token;
|
|
|
|
start_token = expr_get_extra(yyscanner);
|
|
|
|
if (start_token) {
|
|
expr_set_extra(NULL, yyscanner);
|
|
return start_token;
|
|
}
|
|
}
|
|
|
|
max { return MAX; }
|
|
min { return MIN; }
|
|
if { return IF; }
|
|
else { return ELSE; }
|
|
#smt_on { return SMT_ON; }
|
|
{number} { return value(yyscanner, 10); }
|
|
{symbol} { return str(yyscanner, ID); }
|
|
"|" { return '|'; }
|
|
"^" { return '^'; }
|
|
"&" { return '&'; }
|
|
"-" { return '-'; }
|
|
"+" { return '+'; }
|
|
"*" { return '*'; }
|
|
"/" { return '/'; }
|
|
"%" { return '%'; }
|
|
"(" { return '('; }
|
|
")" { return ')'; }
|
|
"," { return ','; }
|
|
. { }
|
|
%%
|
|
|
|
int expr_wrap(void *scanner __maybe_unused)
|
|
{
|
|
return 1;
|
|
}
|