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#pragma once
// ------------------------------------------------------------------------
// Standard library
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
// ----------------------------------------------------------------------------
// Dynamic array.
typedef struct bufHdr
{
vlong len;
vlong cap;
byte buf[];
} bufHdr;
#define _bufHdr(s) ((bufHdr*)((uint8*)(s)-offsetof(bufHdr, buf)))
#define buflen(s) ((s) ? (_bufHdr(s)->len) : 0)
#define bufcap(s) ((s) ? (_bufHdr(s)->cap) : 0)
#define bufend(s) ((s) + buflen(s))
#define bufsize(s) ((s) ? (buflen(s) * sizeof((s)[0])) : 0)
#define buffree(s) ((s) ? (free(_bufHdr(s)), (s) = nil) : 0)
#define buffit(s, n) ((n) <= bufcap(s) ? 0 : ((s) = bufgrow((s), (n), sizeof(*(s)))))
#define bufresize(s, n) \
do { \
(buffit(s, n)); \
((_bufHdr(s)->len) = (n)); \
} while (0)
#define bufpush(s, ...) (buffit((s), 1 + buflen(s)), (s)[_bufHdr(s)->len++] = (__VA_ARGS__))
#define bufpop(s, i) (_bufpop((s), (i), sizeof(*(s))), (s)[_bufHdr(s)->len])
void* bufgrow(void*, vlong, vlong);
void _bufpop(void*, int, vlong);
// -----------------------------------------------------------------------------
// Memory allocation
typedef struct mem·Allocator {
void *(*alloc)(ulong size);
void *(*realloc)(void *ptr, ulong size);
void (*free)(void *ptr);
} mem·Allocator;
static mem·Allocator mem·sys = { .alloc = &malloc, .realloc = &realloc, .free = &free };
typedef struct mem·Arena mem·Arena;
mem·Arena *mem·newarena(mem·Allocator from);
void *mem·arenaalloc(mem·Arena *A, ulong size);
void mem·freearena(mem·Arena *A);
// -----------------------------------------------------------------------------
// Co-routines
typedef struct Coro Coro;
Coro* coro·new(uintptr stk, uintptr (*func)(Coro*, uintptr));
uintptr coro·yield(Coro *c, uintptr arg);
error coro·free(Coro *c);
// -----------------------------------------------------------------------------
// Strings
// TODO(nnoll): Move here?
#include ".include/str.h"
// -----------------------------------------------------------------------------
// Maps or dictionaries
#include ".include/map.h"
// -----------------------------------------------------------------------------
// I/O
typedef FILE Stream;
enum SeekPos
{
seek·CUR = SEEK_CUR,
seek·SET = SEEK_SET,
seek·END = SEEK_END
};
Stream *io·open(byte *name, byte *mode);
error io·close(Stream *s);
byte io·getbyte(Stream *s);
error io·ungetbyte(Stream *s, byte c);
vlong io·read(Stream *s, int sz, int n, void *buf);
int io·readln(Stream *s, int n, byte* buf);
error io·putbyte(Stream *s, byte c);
int io·putstring(Stream *s, string str);
vlong io·write(Stream *s, int sz, int n, void *buf);
int io·flush(Stream *s);
int io·seek(Stream *s, long off, enum SeekPos origin);
/* Generic I/O interfaces */
typedef struct io·Reader
{
int (*read)(int n, void *buf);
} io·Reader;
typedef struct io·Peeker
{
byte (*get)(void);
error (*unget)(byte);
} io·Peeker;
typedef struct io·FullReader
{
io·Reader;
io·Peeker;
} io·FullReader;
typedef struct io·Writer
{
int (*write)(int n, void *buf);
} io·Writer;
typedef struct io·Putter
{
error (*put)(byte);
int (*putstr)(string);
} io·Putter;
typedef struct io·FullWriter
{
io·Writer;
io·Putter;
} io·FullWriter;
typedef struct io·ReadWriter
{
io·Reader;
io·Writer;
} io·ReadWriter;
// -----------------------------------------------------------------------------
// Buffered I/O
// -----------------------------------------------------------------------------
// Error handling functions.
void errorf(const byte* fmt, ...);
#define panicf(...) (errorf(__VA_ARGS__), assert(0))
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