/*
 * Note: we don't use any kind of indexes (btrees, etc) here, because
 * that would add more overhead than it would improve performance.
 */

#include "hwscan2.h"

int is_new_context = 0;

char * context_id   = NULL;
char * context_name = NULL;
char * context_comm = NULL;

void new_context()
{
	if ( context_id != NULL ) free(context_id);
	if ( context_name != NULL ) free(context_name);
	if ( context_comm != NULL ) free(context_comm);

	context_id = context_name = context_comm = NULL;
	is_new_context = 1;
}

int set_context_id(const char *fmt, ...)
{
	va_list ap;
	int rc;

	if ( context_id != NULL ) free(context_id);

	va_start(ap, fmt);
	rc = vasprintf(&context_id, fmt, ap);
	va_end(ap);

	return rc;
}

int set_context_name(const char *fmt, ...)
{
	va_list ap;
	int rc;

	if ( context_name != NULL ) free(context_name);

	va_start(ap, fmt);
	rc = vasprintf(&context_name, fmt, ap);
	va_end(ap);

	return rc;
}

int set_context_comm(const char *fmt, ...)
{
	va_list ap;
	int rc;

	if ( context_comm != NULL ) free(context_comm);

	va_start(ap, fmt);
	rc = vasprintf(&context_comm, fmt, ap);
	va_end(ap);

	return rc;
}

void out_header()
{
	if ( !is_new_context ) return;
	printf("\n# [%s]%s%s\n",
		context_id == NULL ? "UNKNOWN" : context_id,
		context_name == NULL ? "" : " ",
		context_name == NULL ? "" : context_name);
	if ( context_comm != NULL )
		printf("# %s\n", context_comm);
	is_new_context = 0;
}

void out_module(struct modmap_t *module, char *fmt, ...)
{
	if ( context_name == NULL && fmt != NULL ) {
		va_list ap;

		va_start(ap, fmt);
		vasprintf(&context_name, fmt, ap);
		va_end(ap);
	}
	out_header();

	if ( module && module->basename )
		printf("modprobe %s\n", module->basename);
}