0x11.C - printf

This is a project that's part of the first trimester of Holberton School curriculum. Our printf project replicates part of the C standard library printf() function.

Prototype

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

Usage

Prints a string to the standard output, according to a given format

All files were created and compiled on Ubuntu 14.04.4 LTS using GCC 4.8.4 with the command gcc -Wall -Werror -Wextra -pedantic - Wno-format *.c

All files were linted for syntax and style with Betty

Returns the number of characters in the output string on success, -1 otherwise

Call it this way: _printf("format string", arguments...) where format string can contain conversion specifiers and flags, along with regular characters.

Examples

Print string: _printf("%s There", "Hello");`

Output: Hello There

Print integers: _printf("This is a number: %d", 58]);`

Output: This is a number: 58

Print octal: _printf("Octal: %o, 120);

Output: Octal: 170

Conversion Specifiers

Specifier	Output	Examples
c	Character	z
d or i	Signed integer	1024, -1024
s	String of characters	Hello There
b	Binary version of an unsigned integer	01010110
u	Unsigned integer	1024
o	Unsigned octal	432
x	Unsigned hexadecimal integer	3ca
X	Unsigned hexadecimal integer (Uppercase)	3CA
p	Pointer address	0x403212
r	Reversed string of characters	erehT olleH
R	ROT13 Translation of string	Uryyb

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Files contained in this repository

Name	Description
man_3_printf	Man page of the _printf() function.
main.h	Header file with the data type struct, standard libraries and custom prototypes.
_print.c	Main printf function file. Calls other functions.
print_p.c	Contains percentage print function.
print_number.c	Contains decimal and integer functions.
print_char.c	Custom function for char data type.
print_string.c	Function that calls string type variable.
print_binary.c	Function that gets the binary
print_octal.c	Functions that returns octal number.
print_lowhex.c	Calls hexadecimal numbers (lowercase).
print_upphex.c	Calls hexadecimal numbers (Uppercase).
print_unsigned.c	Returns an unisgined data type.
print_lowhex_aux.c	Auxiliar function for hexadecimal specific functions (lowercase).
print_ptr.c	Function that prints a pointer.
print_revstr.c	Returns a string in reverse.
print_rot13.c	Returns a string in Rot13.
_putchar.c	Custom putchar function.

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Task requested in this project

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0. I am not going anywhere. You can print that wherever you want to. I'm here and I am a Spur for life1. I am not going anywhere. You can print that wherever you want to. I'm here and I am a Spur for life.

Write a function that produces output according to a format. Handle the following conversion specifiers:

• c
• s
• %

1. Education is when you read the fine print. Experience is what you get if you dont

Handle the following conversion specifiers:

• d
• i

2. Just because its in print doesn't mean its the gospel

Create a man page for the function

3. With a face like mine, I do better in print|

Handle the following conversion specifiers:

• b

4. What one has not experienced, one will never understand in print

Handle the following conversion specifiers:

• u
• x
• o
• x
• X

5. Nothing in fine print is ever good news

Use a local buffer of 1024 chars in order to call write as little as possible.

6. Handle the following custom conversion specifier

• S : prints the string.
• 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).

7. How is the world ruled and led to war? Diplomats lie to journalists and believe these lies when they see them in print

Handle the following conversion specifier: p

8. The big print gives and the small print takes away

Handle the following flag characters for non-custom conversion specifiers:

• ´+´
• space
• ´#´

9. Sarcasm is lost in print

Handle the following length modifiers for non-custom conversion specifiers:

• l
• h Conversion specifiers to handle: d, i, u, o, x, X

10. Print some money and give it to us for the rain forests

Handle the field width for non-custom conversion specifiers.

11. The negative is the equivalent of the composer's score, and the print the performance

Handle the precision for non-custom conversion specifiers.

12. It's depressing when you're still around and your albums are out of print

Handle the 0 flag character for non-custom conversion specifiers.

13. Every time that I wanted to give up, if I saw an interesting textile, print what ever, suddenly I would see a collection

Handle the - flag character for non-custom conversion specifiers.

14. Print is the sharpest and the strongest weapon of our party

Handle the following custom conversion specifier:

• r : prints the reversed string

15. The flood of print has turned reading into a process of gulping rather than savoring

Handle the following custom conversion specifier:

• R: prints the rot13'ed string

16. *

All the above options work well together.

Authors

• Matias Martinez - Github / Linkedin
• Ezequiel Silva - Github / Linkedin