Custom Printf function

Description

The custom printf function is an implementation of the widely used printf function in the C programming language. It provides a versatile and flexible way to format and print text output. This custom implementation aims to mimic the behavior and functionality of the standard C library's printf function while allowing for customization and extensibility.

Languages and Tools

Contributors details

Mayada Saeed - Maddily - LinkedIn Profile

Sibongile Nhlema - Sibongile-Nhlema - LinkedIn Profile

Tasks

Task 0

This task involves writing a function that produces output according to a format.

Prototype

int _printf(const char *format, ...);

Usage

• format is a character string composed of zero or more directives.
• The following conversion specifiers are to be handled:
  • c
  • s
  • %
• You don’t have to:
  • Reproduce the buffer handling of the C library printf function
  • Handle the flag characters
  • Handle field width
  • Handle precision
  • Handle the length modifiers

Task 1

This task involves handling the conversion specifiers d and i.

Usage

• You don’t have to:
  • Handle the flag characters
  • Handle field width
  • Handle precision
  • Handle the length modifiers

Task 2

This task involves handling the following custom conversion specifier:

• b: the unsigned int argument is converted to binary

Example

int main(void)
{
    _printf("%b\n", 98); /*Output: 1100010*/
    return (0);
}

Task 3

This task involves handling the following conversion specifiers: * u * o * x * X

Usage

• You don’t have to:
  • Handle the flag characters
  • Handle field width
  • Handle precision
  • Handle the length modifiers

Task 4

This task involves using a local buffer of 1024 chars in order to call write as little as possible.

Task 5

This task involves handling the following custom conversion specifier:

• S: Prints a string.

Usage

• Non printable characters (0 < ASCII value < 32 or >= 127) are printed this way: \x, followed by the ASCII code value in hexadecimal (upper case - always 2 characters).

Task 6

This task involves handling the p conversion specifier.

• You don’t have to:
  • Handle the flag characters
  • Handle field width
  • Handle precision
  • Handle the length modifiers

Task 7

This task involves handling the following flag characters for non-custom conversion specifiers:

• +
• space
• #

Task 8

This task involves handling the following length modifiers for non-custom conversion specifiers:

• l
• h

Conversion specifiers to handle:

• d
• i
• u
• o
• x
• X

Task 9

This task involves handling the field width for non-custom conversion specifiers.

Task 10

This task involves handling the precision for non-custom conversion specifiers.

Task 11

This task involves handling the 0 flag character for non-custom conversion specifiers.

Task 12

This task involves handling the - flag character for non-custom conversion specifiers.

Task 13

This task involves handling the following custom conversion specifier:

• r : prints the reversed string

Task 14

This task involves handling the following custom conversion specifier:

• R: prints the rot13'ed string

Task 15

This task involves making sure that all the above options work well together.