LibC Reference

TilekarOS includes a minimal libc implementation for kernel and future user-space use.

1. stdio.h (Standard Input/Output)

printf

int printf(const char* format, ...);

Supports basic format specifiers: %s, %c, %d, %x.

puts

int puts(const char* s);

Writes a string and a newline to stdout.

putchar

int putchar(int c);

Writes a single character to stdout.

---

2. string.h (String Manipulation)

memcpy

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

Copies n bytes from src to dest.

memmove

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

Copies n bytes from src to dest, handling overlapping memory regions safely.

memset

void* memset(void* s, int c, size_t n);

Fills memory with a constant byte.

memcmp

int memcmp(const void* s1, const void* s2, size_t n);

Compares the first n bytes of two memory areas.

strlen

size_t strlen(const char* s);

Calculates the length of a string.

strcmp

int strcmp(const char* s1, const char* s2);

Compares two strings.

strcpy

char* strcpy(char* dest, const char* src);

Copies a string from src to dest.

---

3. stdlib.h (Standard Library)

abort

void abort(void);

Causes abnormal program termination. In the kernel, this typically triggers a panic.