01_FT_LIBFT

Libft

your very first own library

ORDER

Intro

Mandatory

part 1

part 2

Bonus

Introduction

This project gives me the opportunity to re-write those functions, understand them, and learn to use them.

Mandatory part

• Define these sub-functions as static to avoid publishing them with your library.
• Forbidden to use global variables.
• Use ar to create librairy, using the command lib tool is forbidden.

Part 1 - Libc functions

Re-code a set of the libc functions, as defined in their man.

• memset

  void *ft_memset(void *ptr, int value, size_t num);

• bzero

  void ft_bzero(void *s, size_t n);

• memcpy

  int ft_memcpy(void *dst, const void *source, size_t num);

• memccpy

  void *ft_memccpy(void *dest, const void *src, int c, size_t n);

• memmove

  void *ft_memmove(void *dest, const void *src, size_t n);

• memchr

  void *ft_memchr(const void *s, int c, size_t n);

• memcmp

  void *ft_memcmp(const void *ptr1, const void *ptr2, size_t n);

• strlen

  size_t ft_strlen(const char *string);

• strlcpy

  size_t ft_strlcpy(char *dst, const char *src, size_t n);

• strlcat

  size_t ft_strlcat(char *dst, const char *src, size_t n);

• strchr

  char *ft_strchr(char *str, int c);

• strrchr

  char *ft_strrchr(char *str, int c);

• strnstr

  char *ft_strnstr(char *str1, char *str2, size_t n);

• strncmp

  int ft_strncmp(const char *str1, const char *str2, size_t n);

• atoi

  int ft_atoi(const char *str);

• isalpha

  int ft_isalpha(int c);

• isdigit

  int ft_isdigit(int c);

• isalnum

  int ft_isalnum(int c);

• isascii

  int ft_isascii(int c);

• isprint

  int ft_isprint(int c);

• toupper

  int ft_toupper(int c);

• tolower

  int ft_tolower(int c);

• calloc

  void *ft_calloc(size_t count, size_t size);

• strdup

  char *ft_strdup(const char *s);

---

Part 2 - Additional functions

• substr

  Name	Contents
  Function name	ft_substr
  Prototype	char *ft_substr(char const *s, unsigned int start, size_t len);
  Parameters	1. The string from which to create the substring.\n 2. The start index of the substring in the string 's'.\n 3. The maximum length of the substring.
  Return value	The substring.\n NULL if the allocation fails.
  External functs.	malloc
  Description	Allocates (with malloc(3)) and returns a substring from the string 's'.\n The substring begins at index 'start' and is of maximum size 'len'.

• strjoin

  Name	Contents
  Function name	ft_strjoin
  Prototype	char *ft_strjoin(char const *s1, char const *s2);
  Parameters	1. The prefix string.\n 2. The suffix string.
  Return value	The new string.\n NULL if the allocation fails.
  External functs.	malloc
  Description	Allocates (with malloc(3)) and returns a new string, which is the result of the concatenation of 's1' and 's2'.

• strtrim

  Name	Contents
  Function name	ft_strtrim
  Prototype	char *ft_strtrim(char const *s1, char const *set);
  Parameters	1. The string to be trimmed.\n 2. The reference set of characters to trim.
  Return value	The trimmed string.\n NULL if the allocation fails.
  External functs.	malloc
  Description	Allocates (with malloc(3)) and returns a copy of 's1' with the characters specified in 'set' removed from the beginning and the end of the string.

• split

  Name	Contents
  Function name	ft_split
  Prototype	char **ft_split(char const *s, char c);
  Parameters	1. The string to be split.\n 2. The delimiter character.
  Return value	The array of new strings resulting from the split.\n NULL if the allocation fails.
  External functs.	malloc, free
  Description	Allocates (with malloc(3)) and returns an array of strings obtained by splitting 's' using the character 'c' as a delimiter.\n The array must be ended by a NULL pointer.

• itoa

  Name	Contents
  Function name	ft_itoa
  Prototype	char *ft_itoa(int n);
  Parameters	1. The integer to convert.
  Return value	The string representing the integer.\n NULL if the allocation fails.
  External functs.	malloc
  Description	Allocates (with malloc(3)) and returns a string representing the integer received as an argument.\n Negative numbers must be handled.

• strmapi

  Name	Contents
  Function name	ft_strmapi
  Prototype	char *ft_strmapi(char const *s, char (*f)(unsigned int, char));
  Parameters	1. The string on which to iterate.\n 2. The function to apply to each character.
  Return value	The string created from the successive applications of 'f'.\n Returns NULL if the allocation fails.
  External functs.	malloc
  Description	Applies the function 'f' to each character of the string 's' to create a new string (with malloc(3)) resulting from successive applications of 'f'.

• putchar_fd

  Name	Contents
  Function name	ft_putchar_fd
  Prototype	void ft_putchar_fd(char c, int fd);
  Parameters	1. The character to output.\n 2. The file descriptor on which to write.
  Return value	None
  External functs.	write
  Description	Outputs the character 'c' to the given file descriptor.

• putstr_fd

  Name	Contents
  Function name	ft_putstr_fd
  Prototype	void ft_putstr_fd(char *s, int fd);
  Parameters	1. The string to output.\n 2. The file descriptor on which to write.
  Return value	None
  External functs.	write
  Description	Outputs the string 's' to the given file descriptor.

• putendl_fd

  Name	Contents
  Function name	ft_putendl_fd
  Prototype	void ft_putendl_fd(char *s, int fd);
  Parameters	1. The string to output.\n 2. The file descriptor on which to write.
  Return value	None
  External functs.	write
  Description	Outputs the string 's' to the given file descriptor, followed by a newline.

• putnbr_fd

  Name	Contents
  Function name	ft_putnbr_fd
  Prototype	void ft_putnbr_fd(int n, int fd);
  Parameters	1. The integer to output.\n 2. The file descriptor on which to write.
  Return value	None
  External functs.	write
  Description	Outputs the integer 'n' to the given file descriptor.

Bonus part