#include <stdio.h>
#include "lock.h"

// 彂偒崬傒僼傽僀儖偺曐岇張棟
// 乮彂偒崬傒偑廔傢傞傑偱丄媽僼傽僀儖傪曐娗偟偰偍偔乯

// 怴偟偄僼傽僀儖偺彂偒崬傒奐巒
FILE* lock_fopen(const char* filename,int *info) {
	char newfile[512];
	FILE *fp;
	int  no = 0;

	// 埨慡側僼傽僀儖柤傪摼傞乮庤敳偒乯
	do {
		sprintf(newfile,"%s_%04d.tmp",filename,++no);
	} while((fp = fopen(newfile,"r")) && (fclose(fp), no<9999) );
	*info = no;
	return fopen(newfile,"w");
}

// 媽僼傽僀儖傪嶍彍仌怴僼傽僀儖傪儕僱乕儉
int lock_fclose(FILE *fp,const char* filename,int *info) {
	int  ret = 0;
	char newfile[512];
	if(fp != NULL) {
		ret = fclose(fp);
		sprintf(newfile,"%s_%04d.tmp",filename,*info);
		remove(filename);
		// 偙偺僞僀儈儞僌偱棊偪傞偲嵟埆丅
		rename(newfile,filename);
		return ret;
	} else {
		return 1;
	}
}