(almost) replicates C library printf function
Recreate the functionality of printf function in C language.
This function writes the output under the control of a format string that specifies how subsequent arguments
(or arguments accessed via the variable-length argument facilities of stdarg(3)) are converted for output.
The format string is composed of zero or more directives:
ordinary characters (not %), which are copied unchanged to the output stream;
conversion specifications, each of which results in fetching zero or more subsequent arguments.
Each conversion specification is introduced by the % character.
The arguments must correspond properly (after type promotion) with the conversion specifier.
After the %, the following appear in sequence:
doux - int argument is converted to
signed decimal (d);
unsigned octal (o);
unsigned decimal (u);
unsigned hexadecimal (x).
c - int argument is converted to an unsigned char, and the resulting character is written.
s - char * argument is expected to be a pointer to an array of character type (pointer to a string).
p - void * pointer argument is printed in hexadecimal.
my_printf() is also mindful of escape sequences:
\n \t \ \0 \' \"
Include directive "my_printf.c" to your main file
Use the function "my_printf" instead of a regular "printf" (at your own caution :) )
#include "my_printf.c"
my_printf("oh, hello there!\nI'd like %d %s, please!", 5, "chocolates");
==> oh, hello there!
I'd like 5 chocolates, please!
Instead of making a call to write() for every character, buffer must be created. It will output everything in 1 write() call. Also, pointer specification (%p) has not been correctly figured out.
Made at Qwasar Silicon Valley
