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README.md

C - Static libraries

Description 😶‍🌫️

This project is about static libraries are and practiced creating and using them with ar, ranlib, and nm.

Tests ✔️

  • tests: Folder of test files.

Formatting and Examples 🤓

Compile's flags 
-Wall -pedantic -Werror -Wextra -std=gnu89
Example 💤 
julien@ubuntu:~/Static Librairies$ ar -t libmy.a 
0-isupper.o
0-memset.o
0-strcat.o
1-isdigit.o
1-memcpy.o
1-strncat.o
100-atoi.o
2-strchr.o
2-strlen.o
2-strncpy.o
3-islower.o
3-puts.o
3-strcmp.o
3-strspn.o
4-isalpha.o
4-strpbrk.o
5-strstr.o
6-abs.o
9-strcpy.o
_putchar.o
julien@ubuntu:~/Static Librairies$ nm libmy.a 

0-isupper.o:
0000000000000000 T _isupper

0-memset.o:
0000000000000000 T _memset

0-strcat.o:
0000000000000000 T _strcat

1-isdigit.o:
0000000000000000 T _isdigit

1-memcpy.o:
0000000000000000 T _memcpy

1-strncat.o:
0000000000000000 T _strncat

100-atoi.o:
0000000000000000 T _atoi

2-strchr.o:
0000000000000000 T _strchr

2-strlen.o:
0000000000000000 T _strlen

2-strncpy.o:
0000000000000000 T _strncpy

3-islower.o:
0000000000000000 T _islower

3-puts.o:
                 U _putchar
0000000000000000 T _puts

3-strcmp.o:
0000000000000000 T _strcmp

3-strspn.o:
0000000000000000 T _strspn

4-isalpha.o:
0000000000000000 T _isalpha

4-strpbrk.o:
0000000000000000 T _strpbrk

5-strstr.o:
0000000000000000 T _strstr

6-abs.o:
0000000000000000 T _abs

9-strcpy.o:
0000000000000000 T _strcpy

_putchar.o:
0000000000000000 T _putchar
                 U write
How to use it 💨

If you want to prove the library you can run gcc -std=gnu89 {C file with functions to provee} -L. -l{Library name} -o {output file}

For example:

julien@ubuntu:~/Static Librairies$ cat main.c 
#include "main.h"

int main(void)
{
    _puts("\"At the end of the day, my goal was to be the best hacker\"\n\t- Kevin Mitnick");
    return (0);
}
julien@ubuntu:~/Static Librairies$ gcc -std=gnu89 main.c -L. -lmy -o quote
julien@ubuntu:~/Static Librairies$ ./quote 
"At the end of the day, my goal was to be the best hacker"
    - Kevin Mitnick
julien@ubuntu:~/Static Librairies$

Now if you want to create the all library, you need to run: ./create_static_lib.sh This will create the library call all that contains so much functions, if you want to see the functions of it's library you can run: ar -t liball.a Now you can provee the library.

Then, if you want to delete the library, and the executables, you can run: ./clear.sh Now, you're ready.

Tasks 📃

  • 0. A library is not a luxury but one of the necessities of life 🗨️

    • libholberton.a: C Static library containing all the functions listed below:

      • int _putchar(char c);
      • int _islower(int c);
      • int _isalpha(int c);
      • int _abs(int n);
      • int _isupper(int c);
      • int _isdigit(int c);
      • int _strlen(char *s);
      • void _puts(char *s);
      • char *_strcpy(char *dest, char *src);
      • int _atoi(char *s);
      • char *_strcat(char *dest, char *src);
      • char *_strncat(char *dest, char *src, int n);
      • char *_strncpy(char *dest, char *src, int n);
      • int _strcmp(char *s1, char *s2);
      • char *_memset(char *s, char b, unsigned int n);
      • char *_memcpy(char *dest, char *src, unsigned int n);
      • char *_strchr(char *s, char c);
      • unsigned int _strspn(char *s, char *accept);
      • char *_strpbrk(char *s, char *accept);
      • char *_strstr(char *haystack, char *needle);

    • holberton.h: Header file containing the prototypes of all functions included in libholberton.a.

  • 1. Without libraries what have we? We have no past and no future

    • create_static_lib.sh: Bash script that creates a static library called liball.a from all the .c files in the current directory.