diff --git a/.gitignore b/.gitignore
index 7c3c4e7..9f997d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,4 +62,6 @@ CMakeLists.txt
 .vscode
 .vscode/
 .github
-.github/
\ No newline at end of file
+.github/
+
+*.patch
diff --git a/kstdc/include/stdbool.h b/kstdc/include/stdbool.h
new file mode 100644
index 0000000..34117ab
--- /dev/null
+++ b/kstdc/include/stdbool.h
@@ -0,0 +1,34 @@
+#ifndef __CLASSIC_OS_KSTDC_STDBOOL_H__
+#define __CLASSIC_OS_KSTDC_STDBOOL_H__ 1
+
+#ifndef __cplusplus
+
+#undef bool
+
+#ifdef _Bool
+
+#define bool _Bool
+
+#undef true
+#define true 1
+#undef false
+#define false 0
+
+#else
+
+typedef enum bool_t
+{
+	false,
+	true,
+} bool;
+
+#endif
+
+#endif
+
+#ifdef __bool_true_false_are_defined
+#undef __bool_true_false_are_defined
+#endif
+#define __bool_true_false_are_defined 1
+
+#endif // __CLASSIC_OS_KSTDC_STDBOOL_H__
diff --git a/kstdc/include/stddef.h b/kstdc/include/stddef.h
new file mode 100644
index 0000000..ff0a3e6
--- /dev/null
+++ b/kstdc/include/stddef.h
@@ -0,0 +1,32 @@
+#ifndef __CLASSIC_OS_KSTDC_STDDEF_H__
+#define __CLASSIC_OS_KSTDC_STDDEF_H__ 1
+
+typedef long unsigned int size_t;
+typedef long int ptrdiff_t;
+
+#ifndef __cplusplus
+
+typedef int wchar_t;
+
+#endif
+
+#ifdef __cplusplus
+
+typedef decltype(nullptr) nullptr_t;
+
+#endif
+
+#ifndef __cplusplus
+
+#define NULL ((void *)0)
+
+#else
+
+#define NULL 0
+
+#endif
+
+#undef offsetof
+#define offsetof(s, m) __builtin_offsetof(s, m)
+
+#endif // __CLASSIC_OS_KSTDC_STDDEF_H__
diff --git a/kstdc/include/stdint.h b/kstdc/include/stdint.h
new file mode 100644
index 0000000..7d6790d
--- /dev/null
+++ b/kstdc/include/stdint.h
@@ -0,0 +1,120 @@
+#ifndef __CLASSIC_OS_KSTDC_STDINT_H__
+#define __CLASSIC_OS_KSTDC_STDINT_H__ 1
+
+typedef unsigned char uint8_t;
+typedef short unsigned int uint16_t;
+typedef unsigned int uint32_t;
+typedef long unsigned int uint64_t;
+
+typedef unsigned char uint_least8_t;
+typedef short unsigned int uint_least16_t;
+typedef unsigned int uint_least32_t;
+typedef long unsigned int uint_least64_t;
+
+typedef unsigned char uint_fast8_t;
+typedef long unsigned int uint_fast16_t;
+typedef long unsigned int uint_fast32_t;
+typedef long unsigned int uint_fast64_t;
+
+typedef signed char int8_t;
+typedef short int int16_t;
+typedef int int32_t;
+typedef long int int64_t;
+
+typedef signed char int_least8_t;
+typedef short int int_least16_t;
+typedef int int_least32_t;
+typedef long int int_least64_t;
+
+typedef signed char int_fast8_t;
+typedef long int int_fast16_t;
+typedef long int int_fast32_t;
+typedef long int int_fast64_t;
+
+typedef long unsigned int uintptr_t;
+typedef long int intptr_t;
+
+typedef long unsigned int uintmax_t;
+typedef long int intmax_t;
+
+#define INT8_C(x) ((int8_t)(x))
+#define INT16_C(x) ((int16_t)(x))
+#define INT32_C(x) ((int32_t)(x))
+#define INT64_C(x) ((int64_t)(x))
+
+#define UINT8_C(x) ((uint8_t)(x))
+#define UINT16_C(x) ((uint16_t)(x))
+#define UINT32_C(x) ((uint32_t)(x))
+#define UINT64_C(x) ((uint64_t)(x))
+
+#define INTMAX_C(x) ((intmax_t)(x))
+#define UINTMAX_C(x) ((uintmax_t)(x))
+
+#define UINT8_MAX 0xff
+#define UINT16_MAX 0xffff
+#define UINT32_MAX 0xffffffffU
+#define UINT64_MAX 0xffffffffffffffffUL
+
+#define INT8_MAX 0x7f
+#define INT16_MAX 0x7fff
+#define INT32_MAX 0x7fffffff
+#define INT64_MAX 0x7fffffffffffffffL
+
+#define INT8_MIN (-INT8_MAX - 1)
+#define INT16_MIN (-INT16_MAX - 1)
+#define INT32_MIN (-INT32_MAX - 1)
+#define INT64_MIN (-INT64_MAX - 1)
+
+#define UINT_LEAST8_MAX 0xff
+#define UINT_LEAST16_MAX 0xffff
+#define UINT_LEAST32_MAX 0xffffffffU
+#define UINT_LEAST64_MAX 0xffffffffffffffffUL
+
+#define INT_LEAST8_MAX 0x7f
+#define INT_LEAST16_MAX 0x7fff
+#define INT_LEAST32_MAX 0x7fffffff
+#define INT_LEAST64_MAX 0x7fffffffffffffffL
+
+#define INT_LEAST8_MIN (-INT_LEAST8_MAX - 1)
+#define INT_LEAST16_MIN (-INT_LEAST16_MAX - 1)
+#define INT_LEAST32_MIN (-INT_LEAST32_MAX - 1)
+#define INT_LEAST64_MIN (-INT_LEAST64_MAX - 1)
+
+#define UINT_FAST8_MAX 0xff
+#define UINT_FAST16_MAX 0xffffffffffffffffUL
+#define UINT_FAST32_MAX 0xffffffffffffffffUL
+#define UINT_FAST64_MAX 0xffffffffffffffffUL
+
+#define INT_FAST8_MAX 0x7f
+#define INT_FAST16_MAX 0x7fffffffffffffffL
+#define INT_FAST32_MAX 0x7fffffffffffffffL
+#define INT_FAST64_MAX 0x7fffffffffffffffL
+
+#define INT_FAST8_MIN (-INT_FAST8_MAX - 1)
+#define INT_FAST16_MIN (-INT_FAST16_MAX - 1)
+#define INT_FAST32_MIN (-INT_FAST32_MAX - 1)
+#define INT_FAST64_MIN (-INT_FAST64_MAX - 1)
+
+#define UINTPTR_MAX 0xffffffffffffffffUL
+#define INTPTR_MAX 0x7fffffffffffffffL
+#define INTPTR_MIN (-INTPTR_MAX - 1)
+
+#define UINTMAX_MAX 0xffffffffffffffffUL
+#define INTMAX_MAX 0x7fffffffffffffffL
+#define INTMAX_MIN (-INTMAX_MAX - 1)
+
+#define PTRDIFF_MAX 0x7fffffffffffffffL
+#define PTRDIFF_MIN (-PTRDIFF_MAX - 1)
+
+#define SIG_ATOMIC_MAX 0x7fffffff
+#define SIG_ATOMIC_MIN (-SIG_ATOMIC_MAX - 1)
+
+#define SIZE_MAX 0xffffffffffffffffUL
+
+#define WCHAR_MAX 0x7fffffff
+#define WCHAR_MIN (-WCHAR_MAX - 1)
+
+#define WINT_MAX 0xffffffffU
+#define WINT_MIN (-WINT_MAX - 1)
+
+#endif // __CLASSIC_OS_KSTDC_STDINT_H__