#ifndef UNDAR_LIBC_H
#define UNDAR_LIBC_H

#if defined(__has_include)
#if __has_include(<stdint.h>)
#define HAVE_STDINT 1
#endif
#if __has_include(<stdbool.h>)
#define HAVE_STDBOOL 1
#endif
#if __has_include(<stddef.h>)
#define HAVE_STDDEF 1
#endif
#endif

#ifdef HAVE_STDINT
#include <stdint.h>
typedef uint8_t u8;
typedef int8_t i8;
typedef uint16_t u16;
typedef int16_t i16;
typedef uint32_t u32;
typedef int32_t i32;
typedef float f32;
#else
typedef unsigned char u8;
typedef signed char i8;
typedef unsigned short u16;
typedef signed short i16;
typedef unsigned int u32;
typedef signed int i32;
typedef float f32;
#endif

#ifdef HAVE_STDBOOL
#include <stdbool.h>
#else
#define true 1
#define false 0
typedef u8 bool;
#endif

#ifdef HAVE_STDDEF
#include <stddef.h>
#define nil NULL
#else
#define nil ((void *)0)
#endif

#define I8_MIN -128
#define I8_MAX 127
#define U8_MAX 255

#define I16_MIN -32768
#define I16_MAX 32767
#define U16_MAX 65535

#define I32_MIN -2147483648
#define I32_MAX 2147483647
#define U32_MAX 4294967295

#define FIXED_CONST 65536.0f

#define AS_INT(v) ((i32)(v))
#define AS_NAT(v) ((u32)(v))
#define AS_REAL(v) ((i32)(v))
#define FLOAT_TO_REAL(v) (((i32)(v)) * FIXED_CONST)
#define REAL_TO_FLOAT(v) (((f32)(v)) / FIXED_CONST)

#define USED(x) ((void)(x))

typedef struct arena_s Arena;
struct arena_s {
	u8 *tape;
	u32 count;
	u32 capacity;
};

void mcpy(void *dest, void *src, u32 n);
i32 scpy(char *to, const char *from, u32 length);
bool seq(const char *s1, const char *s2);
bool sleq(const char *s1, const char *s2, u32 length);
u32 slen(const char *str);
u32 snlen(const char *str, u32 max_len);
void *aalloc(Arena *arena, u32 size);
u32 afree(Arena *arena);

#endif