chiboyap / printf Goto Github PK

_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: %x lowercase %X UPPERCASE
• 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.

Andres Lopez[email protected]

Daniel Cortes[email protected]