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#pragma once
typedef struct io·Reader
{
int (*read)(void*, int sz, int n, void *buf);
} io·Reader;
extern io·Reader sys·Reader;
typedef struct io·Peeker
{
byte (*get)(void*);
int (*unget)(void*, byte);
} io·Peeker;
extern io·Peeker sys·Peeker;
typedef struct io·Seeker
{
int (*seek)(void *skr, long off, int whence);
long (*tell)(void *skr);
} io·Seeker;
extern io·Seeker sys·Seeker;
typedef struct io·SeekReader
{
io·Seeker;
io·Reader;
} io·SeekReader;
extern io·SeekReader sys·SeekReader;
typedef struct io·PeekReader
{
io·Reader;
io·Peeker;
} io·PeekReader;
extern io·PeekReader sys·PeekReader;
typedef struct io·Writer
{
int (*write)(void*, int sz, int n, void *buf);
} io·Writer;
extern io·Writer sys·Writer;
typedef struct io·Putter
{
int (*put) (void*, byte);
int (*puts)(void*, string);
} io·Putter;
extern io·Putter sys·Putter;
typedef struct io·PutWriter
{
io·Writer;
io·Putter;
} io·PutWriter;
extern io·PutWriter sys·PutWriter;
typedef struct io·ReadWriter
{
io·Reader;
io·Writer;
} io·ReadWriter;
extern io·ReadWriter sys·ReadWriter;
/* XXX: change casing */
enum
{
ReadOK = R_OK,
WriteOK = W_OK,
ExecOK = X_OK,
};
/* XXX(deprecated): file handling */
typedef FILE io·Stream;
typedef struct stat io·Stat;
io·Stream *io·open(byte *name, byte *mode);
int io·fd(io·Stream *s);
int io·stat(io·Stream *s, io·Stat *buf);
int io·close(io·Stream *s);
byte io·getbyte(io·Stream *s);
int io·ungetbyte(io·Stream *s, byte c);
int io·read(io·Stream *s, int sz, int n, void *buf);
int io·readln(io·Stream *s, int n, byte *buf);
int io·putbyte(io·Stream *s, byte c);
int io·putstring(io·Stream *s, string str);
int io·write(io·Stream *s, int sz, int n, void *buf);
int io·flush(io·Stream *s);
int io·seek(io·Stream *s, long off, int whence);
long io·tell(io·Stream *s);
/* buffered i/o */
typedef struct io·Header io·Header;
typedef struct io·Buffer io·Buffer;
#define iota(x) (1 << (x))
enum
{
io·BufEof = -1,
io·BufErr = -2,
io·BufUngets = 8,
io·BufMagic = 0x314159,
io·BufLen = 2*4096,
/* state */
io·BufNil = iota(0),
io·BufRdr = iota(1),
io·BufWtr = iota(2),
io·BufEnd = iota(3)
};
#undef iota
struct io·Header
{
int state, fd, flag;
struct{
int in; /* negative number of bytes at end */
int out; /* number of bytes at start */
int ln; /* number of bytes after last readline */
} off;
intptr pos, cap; /* position in file, capacity of buffer */
uchar *b,*g,*e; /* start, good bytes, end of byte pointers */
};
struct io·Buffer
{
io·Header;
uchar bytes[io·BufLen+io·BufUngets];
};
int bio·init(io·Buffer *io, int fd, int mode);
int bio·initcap(io·Header *io, int fd, int mode, int cap, uchar *buf);
/* basic os helpers */
/* XXX: find a better location for this */
int os·exists(byte *path, int flag);
byte *os·dirname(byte *path);
byte *os·basename(byte *path);
int os·sep(void);
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