libft

This repository contains my implementation of the 42 Libft project, a custom C library that replicates essential standard C library functions.

It includes fundamental utilities for memory management, string manipulation, and more, acting as a core building block for many 42 projects.

Key Features:

• Memory Management: Functions such as malloc, free, and calloc for dynamic memory handling.
• String Manipulation: Key string functions like strlen, strcpy, strcmp, etc.
• Utility Functions: Various helper functions for a wide range of operations.

This project is designed to help strengthen understanding of C programming, focusing on low-level memory manipulation, pointer management, and efficient coding practices.

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Functions Overview

Libc Functions <ctype.h>

Function	Description
ft_isalpha(int i)	Checks if the character is an alphabetic letter (A-Z or a-z).
ft_isdigit(int i)	Checks if the character is a digit (0-9).
ft_isalnum(int i)	Checks if the character is alphanumeric (a letter or a digit).
ft_isascii(int i)	Checks if the character is an ASCII character.
ft_isprint(int i)	Checks if the character is printable (including space).
ft_toupper(int i)	Converts a lowercase letter to uppercase.
ft_tolower(int i)	Converts an uppercase letter to lowercase.

Libc Functions: <string.h>

Function	Description
ft_strlen(const char *str)	Returns the length of the string (excluding the null-terminator).
ft_memset(void *ptr, int value, size_t num)	Fills the first num bytes of the memory area pointed to by ptr with the value value.
ft_bzero(void *ptr, size_t n)	Sets the first n bytes of the memory area pointed to by ptr to zero.
ft_memcpy(void *dest, const void *src, size_t n)	Copies n bytes from memory area src to memory area dest.
ft_memmove(void *dst, const void *src, size_t len)	Moves len bytes from memory area src to memory area dst. Handles overlap.
ft_strlcpy(char *restrict dst, const char *restrict src, size_t dstsize)	Copies up to dstsize - 1 characters from src to dst and null-terminates the result.
ft_strlcat(char *restrict dst, const char *restrict src, size_t dstsize)	Appends src to the end of dst while ensuring no overflow (null-terminated).
ft_strchr(const char *ptr_string, int ptr_find)	Returns a pointer to the first occurrence of ptr_find in ptr_string.
ft_strrchr(const char *ptr_string, int ptr_find)	Returns a pointer to the last occurrence of ptr_find in ptr_string.
ft_strncmp(const char *s1, const char *s2, size_t n)	Compares up to n characters of two strings.
ft_memchr(const void *ptr_src, int ptr_find, size_t n)	Scans the first n bytes of ptr_src for the first occurrence of ptr_find.
ft_memcmp(const void *s1, const void *s2, size_t n)	Compares the first n bytes of memory areas s1 and s2.
ft_strnstr(const char *haystack, const char *needle, size_t len)	Finds the first occurrence of needle in haystack, within len characters.
ft_strdup(const char *s1)	Duplicates the string s1, allocating memory for the new string.

Libc Functions: <stdlib.h>

Function	Description
ft_atoi(const char *str)	Converts the string str to an integer.
ft_calloc(size_t count, size_t size)	Allocates memory for count elements, each of size size, and initializes it to zero.

Additional Functions

Function	Description
ft_substr(char const *s, unsigned int start, size_t len)	Returns a substring from s, starting at start with a length of len.
ft_strjoin(char const *s1, char const *s2)	Concatenates s1 and s2 into a new string.
ft_strtrim(char const *s1, char const *set)	Trims characters from both ends of s1 that are present in set.
ft_split(char const *s, char c)	Splits the string s into an array of strings, using c as the delimiter.
ft_itoa(int n)	Converts the integer n to a string.
ft_strmapi(char const *s, char (*f)(unsigned int, char))	Applies the function f to each character of s, returning a new string.
ft_striteri(char *s, void (*f)(unsigned int, char *))	Applies the function f to each character of s (in place).
ft_putchar_fd(char c, int fd)	Writes the character c to the file descriptor fd.
ft_putstr_fd(char *s, int fd)	Writes the string s to the file descriptor fd.
ft_putendl_fd(char *s, int fd)	Writes the string s followed by a newline to the file descriptor fd.
ft_putnbr_fd(int n, int fd)	Writes the integer n to the file descriptor fd.

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libft_v2 - Enhanced Version

This repository contains my enhanced version of Libft, which builds on the original 42 Libft by adding extra utilities and functionalities tailored to the more complex requirements of 42 projects.

Key Additions:

• ft_printf: A custom implementation of the printf function for formatted output.
• get_next_line: A function to read lines from a file descriptor efficiently.