formatex是什么意思？

大馒头

formatex是什么意思？ 跟format有什么不同？

Ryu2877

/* Same as format(), except does not perform a "copy back" check.
* This means formatex() is faster, but DOES NOT ALLOW this type
* of call:
*  formatex(buffer, len, "%s", buffer)
*  formatex(buffer, len, buffer, buffer)
*  formatex(buffer, len, "%s", buffer[5])
* This is because the output is directly stored into "buffer",
*  rather than copied back at the end.
*/
native formatex(output[] ,len ,const format[] , {Float,Sql,Result,_}:...);