tools/perf/util/config.c

Source file repositories/reference/linux-study-clean/tools/perf/util/config.c

File Facts

System
Linux kernel
Corpus path
tools/perf/util/config.c
Extension
.c
Size
20311 bytes
Lines
992
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

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

struct perf_config_scan_data {
	const char *name;
	const char *fmt;
	const char *value;
	va_list args;
	int ret;
};

static int perf_config_scan_cb(const char *var, const char *value, void *data)
{
	struct perf_config_scan_data *d = data;

	if (!strcmp(var, d->name))
		d->ret = vsscanf(value, d->fmt, d->args);

	return 0;
}

int perf_config_scan(const char *name, const char *fmt, ...)
{
	struct perf_config_scan_data d = {
		.name = name,
		.fmt = fmt,
	};

	va_start(d.args, fmt);
	perf_config(perf_config_scan_cb, &d);
	va_end(d.args);

	return d.ret;
}

static int perf_config_get_cb(const char *var, const char *value, void *data)
{
	struct perf_config_scan_data *d = data;

	if (!strcmp(var, d->name))
		d->value = value;

	return 0;
}

const char *perf_config_get(const char *name)
{
	struct perf_config_scan_data d = {
		.name = name,
		.value = NULL,
	};

	perf_config(perf_config_get_cb, &d);
	return d.value;
}

Annotation

Implementation Notes