如何阅读源代码
据。在这里，我们可以回想在README文件中同样说过这一细节，在命令行或者配置文件中都能指定这一开关。需要说明的是，我们在这里并不一定需要去看get_history这一函数，因为从函数的名称，README文件和程序注释都能很清楚的得知这一函数的功能，不一定要去看代码。而如果要猜想的话，也可以想到，history是webalizer在上次运行的时候记录下来的一个文件，而这个文件则是去读取它，并将它的数据包括到这次的分析中去。不信，我们可以来看看。
void get_history()
{
int i,numfields;
FILE *hist_fp;
char buffer[BUFSIZE];
/* first initalize internal array */
for (i=0;i<12;i++)
{
hist_month[i]=hist_year[i]=hist_fday[i]=hist_lday[i]=0;
hist_hit[i]=hist_files[i]=hist_site[i]=hist_page[i]=hist_visit[i]=0;
hist_xfer[i]=0.0;
}
hist_fp=fopen(hist_fname,"r");
if (hist_fp)
{
if (verbose>1) printf("%s %s ",msg_get_hist,hist_fname);
while ((fgets(buffer,BUFSIZE,hist_fp)) != NULL)
{
i = atoi(buffer) -1;
if (i>11)
{
if (verbose)
fprintf(stderr,"%s (mth=%d) ",msg_bad_hist,i+1);
continue;
}
/* month# year# requests files sites xfer firstday lastday */
numfields = sscanf(buffer,"%d %d %lu %lu %lu %lf %d %d %lu %lu",
&hist_month[i],
&hist_year[i],
&hist_hit[i],
&hist_files[i],
&hist_site[i],
&hist_xfer[i],
&hist_fday[i],
&hist_lday[i],
&hist_page[i],
&hist_visit[i]);
if (numfields==8) /* kludge for reading 1.20.xx history files */
{
hist_page[i] = 0;
hist_visit[i] = 0;
}
}
fclose(hist_fp);
}
else if (verbose>1) printf("%s ",msg_no_hist);
}
/*********************************************/
/* PUT_HISTORY - write out history file */
/*********************************************/
void put_history()
{
int i;
FILE *hist_fp;
hist_fp = fopen(hist_fname,"w");
if (hist_fp)
{
if (verbose>1) printf("%s ",msg_put_hist);
for (i=0;i<12;i++)
{
if ((hist_month[i] != 0) && (hist_hit[i] != 0))
{
fprintf(hist_fp,"%d %d %lu %lu %lu %.0f %d %d %lu %lu &
quot;,
hist_month[i],
hist_year[i],
hist_hit[i],
hist_files[i],
hist_site[i],
hist_xfer[i],
hist_fday[i],
hist_lday[i],
hist_page[i],