我是中国人。我正在读syslog.h，我发现一个我不理解的术语"0-big number"。我能理解洞段的意思，但是我仍然对"0-big number"这个词很好奇，有人能解释一下这个词吗?
/*
* priorities/facilities are encoded into a single 32-bit quantity, where the
* bottom 3 bits are the priority (0-7) and the top 28 bits are the facility
* (0-big number). Both the priorities and the facilities map roughly
* one-to-one to strings in the syslogd(8) source code. This mapping is
* included in this file.
/* facility codes */
#define LOG_KERN (0<<3) /* kernel messages */
#define LOG_USER (1<<3) /* random user-level messages */
....
*/
作者决定称28位集位(2^28 - 1)为大数而不写出来。所以它不是一个术语而是表示 0 到大数