From dbc7b8fc599f40976d238ccd36258e0c65baea6c Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Thu, 19 Feb 2026 19:21:15 +0000
Subject: [PATCH] kernel: libc: add headers

---
 libc/include/kernel/libc/ctype.h  | 26 ++++++++++++++++++++++
 libc/include/kernel/libc/stdio.h  | 21 ++++++++++++++++++
 libc/include/kernel/libc/string.h | 36 +++++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 libc/include/kernel/libc/ctype.h
 create mode 100644 libc/include/kernel/libc/stdio.h
 create mode 100644 libc/include/kernel/libc/string.h

diff --git a/libc/include/kernel/libc/ctype.h b/libc/include/kernel/libc/ctype.h
new file mode 100644
index 0000000..f048340
--- /dev/null
+++ b/libc/include/kernel/libc/ctype.h
@@ -0,0 +1,26 @@
+#ifndef KERNEL_LIBC_TYPES_H_
+#define KERNEL_LIBC_TYPES_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int isalnum(int c);
+extern int isalpha(int c);
+extern int iscntrl(int c);
+extern int isdigit(int c);
+extern int isgraph(int c);
+extern int islower(int c);
+extern int isprint(int c);
+extern int ispunct(int c);
+extern int isspace(int c);
+extern int isupper(int c);
+extern int isxdigit(int c);
+extern int tolower(int c);
+extern int toupper(int c);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc/include/kernel/libc/stdio.h b/libc/include/kernel/libc/stdio.h
new file mode 100644
index 0000000..43fec94
--- /dev/null
+++ b/libc/include/kernel/libc/stdio.h
@@ -0,0 +1,21 @@
+#ifndef KERNEL_STDIO_H_
+#define KERNEL_STDIO_H_
+
+#include <stdarg.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snprintf(char *buffer, size_t count, const char *format, ...);
+int vsnprintf(char *buffer, size_t count, const char *format, va_list va);
+
+int fctprintf(void (*out)(char character, void *arg), void *arg, const char*format, ...);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc/include/kernel/libc/string.h b/libc/include/kernel/libc/string.h
new file mode 100644
index 0000000..ef1f21a
--- /dev/null
+++ b/libc/include/kernel/libc/string.h
@@ -0,0 +1,36 @@
+#ifndef KERNEL_LIBC_STRING_H_
+#define KERNEL_LIBC_STRING_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *strcpy(char *output, const char *input);
+extern char *strncpy(char *output, const char *input, unsigned long count);
+extern char *strchrnul(const char *s, int c);
+extern char *strchr(const char *s, int c);
+extern size_t lfind(const char *str, const char accept);
+extern size_t strspn(const char *s, const char *c);
+extern size_t strcspn(const char *s, const char *c);
+extern char *strpbrk(const char *s, const char *b);
+extern size_t strlen(const char *str);
+extern char *strrchr(const char *str, int c);
+extern int strcmp(const char *s1, const char *s2);
+extern int strncmp(const char *s1, const char *s2, unsigned long n);
+extern void *memcpy(void *str1, const void *str2, size_t n);
+extern int memcmp(const void *str1, const void *str2, size_t n);
+extern void *memset(void *str, int c, size_t n);
+extern void *memmove(void *dst, const void *src, size_t n);
+extern char *strdup(const char *src);
+extern char *strtok_r(char *str, const char *delim, char **saveptr);
+extern char *strcat(char *dest, const char *src);
+extern char *strncat(char *dest, const char *src, size_t num);
+extern void *memchr(const void *ptr, int value, unsigned long num);
+
+#ifdef __cplusplus
+}
+#endif
+#endif