往buffer的確定位置填充word，有沒有更好的實現(xiàn)方式？

finalfantasy000

inline static void write_word(void* buffer,unsigned short content,unsigned short site) {         content = htons(content);     memcpy ((unsigned char*)buffer+site, &content, 2); }

有沒有更加簡潔的實現(xiàn)方式？

maeng

原帖由 finalfantasy000 于 2009-11-16 16:02 發(fā)表
inline static
void write_word(void* buffer,unsigned short content,unsigned short site)
{
        content = htons(content);
    memcpy ((unsigned char*)buffer+site, &content, 2);
}
有沒有更加 ...

為啥上面memcpy要copy2個字節(jié)么？還是site的大小？我猜是site。至于效率問題，不清楚。

hellioncu

如果能保證(unsigned char*)buffer+site是2字節(jié)對齊，或者是X86

可以*((unsigned short *)((unsigned char*)buffer+site)) = htons(content);