tools/perf/util/pmu.l

Source file repositories/reference/linux-study-clean/tools/perf/util/pmu.l

File Facts

System
Linux kernel
Corpus path
tools/perf/util/pmu.l
Extension
.l
Size
767 bytes
Lines
49
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

%option prefix="perf_pmu_"
%option reentrant
%option bison-bridge

%{
#include <stdlib.h>
#include <linux/bitops.h>
#include "pmu.h"
#include "pmu-bison.h"

char *perf_pmu_get_text(yyscan_t yyscanner);
YYSTYPE *perf_pmu_get_lval(yyscan_t yyscanner);

static int value(yyscan_t scanner, int base)
{
	YYSTYPE *yylval = perf_pmu_get_lval(scanner);
	char *text = perf_pmu_get_text(scanner);
	long num;

	errno = 0;
	num = strtoul(text, NULL, base);
	if (errno)
		return PP_ERROR;

	yylval->num = num;
	return PP_VALUE;
}

%}

num_dec         [0-9]+

%%

{num_dec}	{ return value(yyscanner, 10); }
config		{ return PP_CONFIG; }
-		{ return '-'; }
:		{ return ':'; }
,		{ return ','; }
.		{ ; }
\n		{ ; }

%%

int perf_pmu_wrap(void *scanner __maybe_unused)
{
	return 1;
}

Annotation

Implementation Notes