link "c"
link "m"
pub extern func acos(x: f64) f64;
pub extern func acosf(x: f32) f32;
pub extern func asin(x: f64) f64;
pub extern func asinf(x: f32) f32;
pub extern func atan(x: f64) f64;
pub extern func atanf(x: f32) f32;
pub extern func atan2(x: f64,y: f64) f64;
pub extern func atan2f(x: f32,y: f32) f32;
pub extern func cos(x: f64) f64;
pub extern func cosf(x: f32) f32;
pub extern func cosh(x: f64) f64;
pub extern func coshf(x: f32) f32;
pub extern func sin(x: f64) f64;
pub extern func sinf(x: f32) f32;
pub extern func tan(x: f64) f64;
pub extern func tanf(x: f32) f32;
pub extern func sqrt(x: f64) f64;
pub extern func sqrtf(x: f32) f32;
pub extern func floor(x: f64) f64;
pub extern func floorl(x: i64) i64;
pub extern func ceil(x: f64) f64;
pub extern func pow(x: f64,k: f64) f64; 

// stdio.h
link "havostd"
constexpr SEEK_SET = 0
constexpr SEEK_CUR = 1
constexpr SEEK_END = 2
constexpr BUFSIZ = 2
constexpr EOF = (-1)
constexpr FILENAME_MAX = 250
constexpr FOPEN_MAX = 20
constexpr TMP_MAX = 32767
constexpr PROT_EXEC = 4
constexpr PROT_WRITE = 2
constexpr PROT_READ = 1
constexpr PROT_NONE = 0
constexpr MAP_ANON = 0x0020
constexpr MAP_ANONYMUS = 0x0020
constexpr MAP_PRIVATE = 0x0002


pub struct FILE {
	ptr: *u8,
	cnt: i32,
	base: *u8,
	flag: i32,
	file: i32,
	charbuf: i32,
	bufsiz: i32,
	tmpfname: *char
}


pub extern func get_stdin() *FILE;
pub extern func get_stderr() *FILE;
pub extern func get_stdout() *FILE;

pub extern var stdin: *FILE;
pub extern var stdout: *FILE;
pub extern var stderr: *FILE;

constexpr STDIN = stdin
constexpr STDERR = stderr
constexpr STDOUT = stdout

pub extern func remove(file: *char) i32;
pub extern func rename(file: *char,to: *char) i32;
pub extern func tmpfile() *FILE;
pub extern func fclose(f: *FILE) i32;
pub extern func fflush(f: *FILE) i32;
pub extern func fopen(file: *char,mode: *char) *FILE;
pub extern func freopen(file: *char,mode: *char,f: *FILE) *FILE;
pub extern func fgetc(f: *FILE) char;
pub extern func fgets(dst: *char,count: i32,file: *FILE) *char;
pub extern func fputs(s: *char,f: *FILE) void;
pub extern func putchar(c: char) void; 
pub extern func getc(f: *FILE) char;
pub extern func putc(c: char,f: *FILE) i32;
pub extern func puts(c: *char) i32;
pub extern func gets(c: *char) *char;
pub extern func fread(ptr: *u8,a0: usize,a1: usize,f: *FILE) i32;
pub extern func fwrite(ptr: *u8,a0: usize,a1: usize,f: *FILE) i32;
pub extern func fgetpos(f:* FILE,out: *i64) i32;
pub extern func fseek(f: *FILE,x: i32,y: i32) i32;
pub extern func fsetpos(f: *FILE,v: *i64) i32;
pub extern func printf(fmt: *char,...) i32;
pub extern func fprintf(f: *FILE,fmt: *char,...) i32;
pub extern func sprintf(out: *char,in: *char,...) i32;
pub extern func scanf(in: *char,...) i32;
pub extern func fscanf(f: *FILE,c: *char,...) i32;
pub extern func sscanf(c: *char,c1: *char,...) i32;

// stdlib.h

pub extern func malloc(size: usize) *u8;
pub extern func calloc(c: i32,size: usize) *u8;
pub extern func free(p: *u8) void;
pub extern func realloc(p: *u8,size: usize) *u8;
pub extern func exit(i: i32) void;
pub extern func system(c: *char) i32;
pub extern func rand() u64;
pub extern func get_rand_max() i32;
pub extern func srand(s: i32) void;

constexpr RAND_MAX = get_rand_max()



pub extern func memcpy(dst: *u8,src: *u8,count: usize) *u8;
pub extern func memmove(dst: *u8,src: *u8,count: usize) *u8;
pub extern func strlen(c: *char) i32;
pub extern func memset(dst: *u8,b: u8,c: usize) *u8;
pub extern func usleep(i: i32) void;
pub extern func mmap(addr: *u8,len: usize,prot: i32,flags: i32,fd: i32,offset:i64) *u8;


pub extern func ltoa(num: i64,str: *char,radix: i32) *char;
pub extern func ultoa(num: u64,str: *char,radix: i32) *char;
pub extern func itoa(num: i32,str: *char,radix: i32) *char;
pub extern func ftoa(num: f32,str: *char,precision: u8) *char;


pub extern func time(t: *u64) u64;
pub extern func srand(v: u64) void;