libasm

A library of standard C functions re-implemented in x86-64 assembly (NASM).

Functions

Function	Prototype	Description
ft_strlen	size_t ft_strlen(const char *s)	Returns the length of a string
ft_strcpy	char *ft_strcpy(char *dst, const char *src)	Copies a string to a destination buffer
ft_strcmp	int ft_strcmp(const char *s1, const char *s2)	Compares two strings lexicographically
ft_write	ssize_t ft_write(int fd, const void *buf, size_t count)	Writes to a file descriptor (sets errno on error)
ft_read	ssize_t ft_read(int fd, void *buf, size_t count)	Reads from a file descriptor (sets errno on error)
ft_strdup	char *ft_strdup(const char *s)	Allocates and returns a duplicate of a string

Build

make        # builds libasm.a
make clean  # removes object files
make fclean # removes object files and library
make re     # full rebuild

Usage

Include the header and link against the library:

#include "libasm.h"

cc main.c -L. -lasm -o main

Requirements

• NASM (Netwide Assembler)
• GCC or compatible C compiler
• Linux x86-64