find arduino library core like strcmpy, delay, dtostrf etc

Development Libraries
1

I've been looking for a while inside Arduino's files to find the core library.
I searcing for this issue and find that the core library in
hardware/arduino/avr/cores/arduino
and also i can find the header file in
hardware/tools/avr/avr/include
it's ok to find them

But the problem is i can't find the library like strcmpy,dtostrf,delay or other. I want to know how it's been created, how it's work.

can anybody help me find this ?

thanks a lot

2

caturjackman:
But the problem is i can't find the library like strcmpy,dtostrf

,delay or other.

https://github.com/arduino/Arduino/tree/master/hardware/arduino/avr/cores/arduino
https://github.com/arduino/Arduino/blob/master/hardware/arduino/avr/cores/arduino/wiring.c#L105-L118