libft.h

A collections of standard C library functions with some additional ones.

The aim of this project is to re-create some standard C library functions, the functions created in Libft will become the basic building blocks of later projects that we are going to create in the later of the program. Using C standard library at 42 is strictly forbidden, the only functions we're allowed to use are the functions created by ourselves using few basic standard functions like write(), malloc(), free().

Every type of errors "Segmentation fault, buss error, memory overflow, memory overlapping, etc" should be handled carefully.

Build

Clone this repository.

https://github.com/1mthe0wl/libft

cd into the libft directory.

cd libft

Make

make

delete all the *.o files.

make clean

Delete all the *.0 files plus libft.a

make fclean

Remake everything.

make re

Manual

functions	description
ft_atoi	converts ASCII string to integer.
ft_bzero	Writes zeroes to byte string.
ft_calloc	Contiguously allocates size bytes of memory and returns a pointer to the allocated memory.
ft_isalpha	Checks if a character is whether alphabetic or not.
ft_isdigit	checks if a character is a digit or not.
ft_isalnum	Checks if a character isalpha or isdigit or non-alnum.
ft_isascii	Cheks whether a character is ascii or not.
ft_isprint	Checks if a character is printable or not.
ft_itoa	Recives an integer and converts it to a string with allocating enough space for it.
ft_memchr	Scans memory for string.
ft_memcmp	Compares two memory areas of string.
ft_memcpy	Copies an area of memory to another.
ft_memmove	Moves an area of memory to another.
ft_memset	Writes n area of memory with a byte value.
ft_putchar_fd	Writes a character to a file descriptor.
ft_putendl_fd	Writes a string to a file descriptor, followed by a new line.
ft_putnbr_fd	Writes a number to a file descriptor.
ft_putstr_fd	Writes a string to a file descriptor.
ft_split	Split a string using a given character as a second parameter.
ft_strchr	Locates character in string.
ft_strdup	Duplicates a string.
ft_striteri	Applies a function to eacg character of a string.
ft_strjoin	Concatinates two string.
ft_strlcat	Concatinates two string to a bounded size.
ft_strlcpy	Copies a string to anothere to a bounded size.
ft_strlen	Returns length of a given string.
ft_strmapi	Applies a function to each character of a given string.
ft_strncmp	Compares two string to n character.
ft_strnstr	Locates a substring in a string.
ft_strrchr	Locates character in string.
ft_strtrim	Trims the beginning and the end of a string if they match the given chars.
ft_substr	Returns a substring in a given string from a given index to a given length.
ft_tolower	Convert char to lowercase.
ft_toupper	Convert char to uppercase.

Functions without standard manual

ft_substr :

  char *ft_substr(char const *s, unsigned int start,size_t len);

  1.  The string from which to create the substring.
  2.  The start index of the substring in the string’s’.
  3.  The maximum length of the substring.

ft_strjoin :

  char *ft_strjoin(char const *s1, char const *s2);

  1.  The prefix string.
  2.  The suffix string.

ft_strtrim :

  char *ft_strtrim(char const *s1, char const *set);

  1.  The string to be trimmed.
  2.  The reference set of characters to trim.

ft_split :

  char **ft_split(char const *s, char c);

  1.  The string to be split.
  2.  The delimiter character.

ft_itoa :
```
  char *ft_itoa(int n);
```

ft_strmapi :

  char *ft_strmapi(char const *s, char (*f)(unsignedint, char));
  
  1.  The string on which to iterate.
  2.  The function to apply to each character.

ft_striteri :

  void ft_striteri(char *s, void (*f)(unsigned int,char*));
  
  1.  The string on which to iterate.
  2.  The function to apply to each character.

ft_putchar_fd :

  void ft_putchar_fd(char c, int fd);
  
  1.  The character to output.
  2.  The file descriptor on which to write.

ft_putstr_fd :

  void ft_putstr_fd(char *s, int fd);
  
  1.  The string to output.
  2.  The file descriptor on which to write.

ft_putendl_fd :

  void ft_putendl_fd(char *s, int fd);
  
  1.  The string to output.
  2.  The file descriptor on which to write.

ft_putnbr_fd :

  void ft_putnbr_fd(int n, int fd);
  
  1.  The integer to output.
  2.  The file descriptor on which to write.

What is a file descriptor?

RTFWikipedia

get_next_line

char *get_next_line(int fd) Calling the function in a loop will read line by line on the file descriptor until the EOF. It returns the line that has been read.

ft_printf

int ft_printf(const char *format, ...)

%c print a single character.
%s print a string of characters.
%p print the pointer in hexadecimal.
%d print a decimal number.
%i print an integer in base 10.
%u print an unsigned decimal (base 10) number
%x print a number in hexadecimal (base 16) with lowercase.
%X print a number in hexadecimal (base 16) with uppercase.
%% print a percent sign.
- left-justify within the given field width; Right justification is the default.
0 left-pads the number with zeroes (0) instead of spaces when padding is specified.
. the precision in not specified in the format string, but as an additional integer value argument preceding the argument that has to be formated.

Free Software, Hell Yeah!

movabs/libft