_printf is our custom implementation of the C printf program function . It produces an output according to format described. It writes to stdout (standard output stream).
_printf has been tested on Ubuntu 14.04.6 and 18.04.3 LTS
Done and tested with VirtualBox on Ubuntu via Vagrant(2.2.10)
String
- Specifier:
%s - Input:
len = _printf("I am a string. \n"); - Output:
I am a string
Character
- Specifier:
%c - Input:
_printf("char: %c\n", 'A'); - Output:
char: A
Integer
- Specifier:
%i - Input: `_printf("Length: %i\n", len);
- Output:
Length: 16
Decimal:
- Specifier:
%d - Input:
_printf("%d\n", 1000); - Output:
1000
Unsigned Integer:
- Specifier:
%u - Input:
unsigned int ui = (unsigned int)INT_MAX + 1024;_printf("Unsigned:[%u]\n", ui); - Output:
Unsigned:[2147484671]
Octal:
- Specifier:
%o - Input:
_printf("Unsigned octal:[%o]\n", ui); - Output:
Unsigned octal:[20000001777]
Hexadecimal:
- Specifier:
%xlowercase%XUPPERCASE - Input:
_printf("Unsigned hexadecimal:[%x, %X]\n", ui, ui); - Output:
Unsigned hexadecimal:[800003ff, 800003FF]
- Produces output with (printf) conversion specifiers c, s, and %.
- Handles conversion specifiers d, i.
- man page added.
- Handles conversion specifier b.
- Handles conversion specifiers u, o, x, X.
- Uses a local buffer of 1024 chars in order to call write as little as possible.
- Handles conversion specifier S.
- Handles conversion specifier p.
- Handles flag characters +, space, and # for non-custom conversion specifiers.
- Handles length modifiers l and h for non-custom conversion specifiers.
- Handles the field width for non-custom conversion specifiers.
- Handles the precision for non-custom conversion specifiers.
- Handles the 0 flag character for non-custom conversion specifiers.
- Handles the custom conversion specifier r that prints the reversed string.
- Handles the custom conversion specifier R that prints the rot13'ed string.
- Ultimate goal: All above options working seamlessly together
WORK IN PROGRESS.