The aim of this project is to code a C library regrouping usual functions.
First part: re-code a set of the libc functions, as defined in their man, with the same prototype and behaviors as the originals.
Second part: code a set of functions that are either not included in the libc, or included in a different form.
Bonus part: code functions to manipulate lists.
Notion de Estudo da Libft
Function
Description
ft_isalpha
checks for an alphabetic character.
ft_isdigit
checks for a digit (0 through 9).
ft_isalnum
checks for an alphanumeric character; it is equivalent to (isalpha(c)
ft_isascii
checks whether c is a 7-bit unsigned char value that fits into the ASCII character set.
ft_isprint
checks for any printable character including space.
ft_toupper
convert lowercase letters to uppercase
ft_tolower
convert uppercase letters to lowercase.
Function
Description
ft_memset
fills the first n bytes of the memory area pointed to by s with the constant byte c
ft_bzero
erases the data in the n bytes of the memory starting at the location pointed to by s, by writing zeros (bytes containing '\0') to that area.
ft_memcpy
copies n bytes from memory area src to memory area dest. The memory areas must not overlap. Use memmove(3) if the memory areas do overlap.
ft_memccpy
copies no more than n bytes from memory area src to memory area dest, stopping when the character c is found. If the memory areas overlap, the results are undefined.
ft_memmove
copies n bytes from memory area src to memory area dest. The two strings may overlap; the copy is always done in a non-destructive manner.
ft_memchr
scans the initial n bytes of the memory area pointed to by s for the first instance of c.
ft_memcmp
function compares the first n bytes (each interpreted as unsigned char) of the memory areas s1 and s2.
ft_strlen
The ft_strlen() function computes and returns the length of the string s.
ft_strlcpy
copies up to size - 1 characters from the NUL-terminated string src to dst, NUL-terminating the result.
ft_strlcat
appends the NUL-terminated string src to the end of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-terminating the result.
ft_strchr
returns a pointer to the first occurrence of the character c in the string s.
ft_strrchr
returns a pointer to the last occurrence of the character c in the string s.
ft_strnstr
locates the first occurrence of the null-terminated string little in the string big, where not more than len characters are searched.
ft_strncmp
lexicographically compares the null-terminated strings s1 and s2. Returns an integer greater than, equal to, or less than 0, according as the string s1 is greater than, equal to, or less than the string s2. Compares not more than n characters. The comparison is done using unsigned characters, so that '\200' is greater than '\0'.
ft_strdup
returns a pointer to a new string which is a duplicate of the string s.
Function
Description
ft_atoi
converts the initial portion of the string pointed to by str to int representation and returns the int.
ft_calloc
allocates memory for an array of nmemb elements of size bytes each and returns a pointer to the allocated memory. The memory is set to zero.
Function
Description
ft_substr
Allocates and returns a substring from the string ’s’. The substring begins at index ’start’ and is of maximum size ’len’.
ft_strjoin
Allocates and returns a new string, which is the result of the concatenation of ’s1’ and ’s2’.
ft_strtrim
Allocates and returns a copy of ’s1’ with the characters specified in ’set’ removed from the beginning and the end of the string.
ft_split
Allocates and returns an array of strings obtained by splitting ’s’ using the character ’c’ as a delimiter.
ft_strmapi
Applies the function ’f’ to each character of the string ’s’ to create a new string resulting from successive applications of ’f’.
Function
Description
ft_itoa
Allocates and returns a string representing the integer received as an argument. Negative numbers must be handled.
file-descriptor's functions
Function
Description
ft_putchar_fd
Outputs the character ’c’ to the given file descriptor.
ft_putstr_fd
Outputs the string ’s’ to the given file descriptor.
ft_putendl_fd
Outputs the string ’s’ to the given file descriptor, followed by a newline.
ft_putnbr_fd
Outputs the integer ’n’ to the given file descriptor.
Function
Description
ft_lstnew
Allocates and returns a new element. The variable ’content’ is initialized with the value of the parameter ’content’. The variable ’next’ is initialized to NULL.
ft_lstadd_front
Adds the element ’new’ at the beginning of the list.
ft_lstsize
Counts the number of elements in a list.
ft_lstlast
Returns the last element of the list.
ft_lstadd_back
Adds the element ’new’ at the end of the list.
ft_lstdelone
Takes as a parameter an element and frees the memory of the element’s content using the function ’del’ given as a parameter and free the element.
ft_lstclear
Deletes and frees the given element and every successor of that element, using the function ’del’ and free. Finally, the pointer to the list is set to NULL.
ft_lstiter
Iterates the list ’lst’ and applies the function ’f’ to the content of each element.
ft_lstmap
Iterates the list ’lst’ and applies the function ’f’ to the content of each element. Creates a new list resulting of the successive applications of the function ’f’. The ’del’ function is used to delete the content of an element if needed.
Command
Usage
make
creates .o files for each function as well as the main library file, libft.a
make clean
removes the .o files used to create the library
make fclean
removes the .o & .a files used to create the library
make re
removes all .o & .a files then remakes them