gsyscnf.c

日本著名的的嵌入式实时操作系统T-Kernel的源码及用户手册。

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.01.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2004/6/28.
 *
 *----------------------------------------------------------------------
 */

/*
 *      gsyscnf.c (sysinit)
 *      SYSCONF access utilities
 */

#include "sysinit.h"
#include <sys/util.h>
#include <sys/sysinfo.h>
#include <libstr.h>
#define	SysConfPtr	(SCInfo.sysconf)

LOCAL	B	*SearchSysConf(B *name)
{
	W	len;
	B	*p;

	len = strlen(name);
	if (len > 0) {
		if (len > 16) len = 16;
		for (p = SysConfPtr; *p; ) {
			if (*p > ' ' && *p != '#' && memcmp(name, p, len) == 0)
						return p;
			while (*p && *p++ != '\n');
		}
	}
	return	(B*)NULL;
}

LOCAL	B	*SkipNext(B *p)
{
	for (; *p > ' ' && *p != '#'; p++);
	for ( ; ; p++) {
		if (*p == '\0' || *p == '\n' || *p == '#') return (B*)NULL;
		if (*p > ' ') break;
	}
	return p;
}

EXPORT	W	GetSysConf(B *name, W *val)
{
	W	cnt = 0;
	B	*p;

	if ( (p = SearchSysConf(name)) != NULL ) {
		for ( ; (p = SkipNext(p)) && cnt < L_SYSCONF_VAL; cnt++) {
			*val++ = (W)strtol(p, &p, 0);
		}
	}
	return cnt;
}

EXPORT	W	GetSysConfStr(B *name, B *str)
{
	B	*p;
	B	*d = str;

	if ( (p = SearchSysConf(name)) != NULL ) {
		if ( (p = SkipNext(p)) != NULL ) {
			while (*p && *p != '\n' && *p != '#') {
				*d++ = *p++;
				if (d - str >= L_SYSCONF_STR - 1) break;
			}
		}
	}
	*d = 0;
	return d - str;
}