/**
 * C's <stdio.h> for the D programming language
 * Authors: Walter Bright, Digital Mars, http://www.digitalmars.com
 * License: Public Domain
 * Source: $(PHOBOSSRC std/c/_stdio.d)
 * Macros:
 *      WIKI=Phobos/StdCStdio
 */



module std.c.stdio;

import std.c.stddef;
private import std.c.stdarg;

extern (C):

version (Win32)
{   // Meaning Digital Mars C for Win32

    const int _NFILE = 60;      ///
    const int BUFSIZ = 0x4000;  ///
    const int EOF = -1;         ///
    const int FOPEN_MAX = 20;   ///
    const int FILENAME_MAX = 256;  /// 255 plus NULL
    const int TMP_MAX = 32767;  ///
    const int _SYS_OPEN = 20;   ///
    const int SYS_OPEN = _SYS_OPEN;     ///
    const wchar WEOF = 0xFFFF;          ///

    struct _iobuf
    {
        align (1):

        char    *_ptr;
        int     _cnt;
        char    *_base;
        int     _flag;
        int     _file;
        int     _charbuf;
        int     _bufsiz;
        int     __tmpnum;
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    alias _iobuf FILE;  ///

    enum
    {
        _F_RDWR = 0x0003,
        _F_READ = 0x0001,
        _F_WRIT = 0x0002,
        _F_BUF  = 0x0004,
        _F_LBUF = 0x0008,
        _F_ERR  = 0x0010,
        _F_EOF  = 0x0020,
        _F_BIN  = 0x0040,
        _F_IN   = 0x0080,
        _F_OUT  = 0x0100,
        _F_TERM = 0x0200,
    }

    extern FILE _iob[_NFILE];
    extern void function() _fcloseallp;
    extern ubyte __fhnd_info[_NFILE];

    enum
    {
        FHND_APPEND     = 0x04,
        FHND_DEVICE     = 0x08,
        FHND_TEXT       = 0x10,
        FHND_BYTE       = 0x20,
        FHND_WCHAR      = 0x40,
    }

    enum
    {
        _IOREAD = 1,
        _IOWRT  = 2,
        _IONBF  = 4,
        _IOMYBUF = 8,
        _IOEOF  = 0x10,
        _IOERR  = 0x20,
        _IOLBF  = 0x40,
        _IOSTRG = 0x40,
        _IORW   = 0x80,
        _IOFBF  = 0,
        _IOAPP  = 0x200,
        _IOTRAN = 0x100,
    }

    const FILE *stdin  = &_iob[0];      ///
    const FILE *stdout = &_iob[1];      ///
    const FILE *stderr = &_iob[2];      ///
    const FILE *stdaux = &_iob[3];      ///
    const FILE *stdprn = &_iob[4];      ///

    alias int fpos_t;   ///
    const char[] _P_tmpdir = "\\";
    const wchar[] _wP_tmpdir = "\\";
    const int L_tmpnam = _P_tmpdir.length + 12;

    ///
    int  ferror(FILE *fp)       { return fp._flag&_IOERR;       }
    ///
    int  feof(FILE *fp) { return fp._flag&_IOEOF;       }
    ///
    void clearerr(FILE *fp)     { fp._flag &= ~(_IOERR|_IOEOF); }
    ///
    void rewind(FILE *fp)       { fseek(fp,0L,SEEK_SET); fp._flag&=~_IOERR; }
    int  _bufsize(FILE *fp)     { return fp._bufsiz; }
    ///
    int  fileno(FILE *fp)       { return fp._file; }
    int  _snprintf(char *,size_t,char *,...);
    int  _vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode);  ///
}
else version (Win64)
{
    const int _NSTREAM_ = 512;
    const int _NFILE = _NSTREAM_;
    const int BUFSIZ = 512;
    const int _IOB_ENTRIES = 20;
    const int EOF = -1;

    struct _iobuf
    {   char* _ptr;
        int _cnt;
        char* _base;
        int _flag;
        int _file;
        int _charbuf;
        int _bufsiz;
        char* _tmpfname;
    }

    alias _iobuf FILE;

    const char[] _P_tmpdir = "\\";
    const wchar[] _wP_tmpdir = "\\";
    const int L_tmpnam = _P_tmpdir.length + 12;
    const int L_tmpnam_s = _P_tmpdir.length + 16;

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    const int FILENAME_MAX = 260;
    const int FOPEN_MAX = 20;
    const int _SYS_OPEN = 20;
    const int TMP_MAX = 32767;
    const int _TMP_MAX_S = 2147483647;

    alias long fpos_t;

    FILE* __iob_func();

    FILE* stdin;  // = &__iob_func()[0];
    FILE* stdout; // = &__iob_func()[1];
    FILE* stderr; // = &__iob_func()[2];

    enum
    {
        _IOREAD = 1,
        _IOWRT  = 2,
        _IONBF  = 4,
        _IOMYBUF = 8,
        _IOEOF  = 0x10,
        _IOERR  = 0x20,
        _IOLBF  = 0x40,
        _IOSTRG = 0x40,
        _IORW   = 0x80,
        _IOFBF  = 0,
        _IOAPPEND  = 0x200,
    }

    int  ferror(FILE *fp)       { return fp._flag&_IOERR;       }
    int  feof(FILE *fp)         { return fp._flag&_IOEOF;       }
    void clearerr(FILE *fp);
    void rewind(FILE *fp);
    int  fileno(FILE *fp)       { return fp._file; }
    int  _snprintf(char *,size_t,char *,...);
    int  _vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode) { return mode; }

    int _filbuf(FILE *fp);
    int _flsbuf(int c, FILE *fp);

    int _fputc_nolock(int c, FILE *fp)
    {
        if (--fp._cnt >= 0)
            return *fp._ptr++ = cast(char)c;
        else
            return _flsbuf(c, fp);
    }

    int _fgetc_nolock(FILE *fp)
    {
        if (--fp._cnt >= 0)
            return *fp._ptr++;
        else
            return _filbuf(fp);
    }

    int _lock_file(FILE *fp);
    int _unlock_file(FILE *fp);
}
else version (linux)
{
    const int EOF = -1;
    const int FOPEN_MAX = 16;
    const int FILENAME_MAX = 4095;
    const int TMP_MAX = 238328;
    const int L_tmpnam = 20;

    struct _iobuf
    {
        align (1):

        int     _flags;
        char*   _read_ptr;
        char*   _read_end;
        char*   _read_base;
        char*   _write_base;
        char*   _write_ptr;
        char*   _write_end;
        char*   _buf_base;
        char*   _buf_end;
        char*   _save_base;
        char*   _backup_base;
        char*   _save_end;
        void*   _markers;
        _iobuf* _chain;
        int     _fileno;
        int     _blksize;
        size_t  _old_offset;
        ushort  _cur_column;
        byte    _vtable_offset;
        char[1] _shortbuf;
        void*   _lock;
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    alias _iobuf FILE;  ///

    enum
    {
        _F_RDWR = 0x0003,
        _F_READ = 0x0001,
        _F_WRIT = 0x0002,
        _F_BUF  = 0x0004,
        _F_LBUF = 0x0008,
        _F_ERR  = 0x0010,
        _F_EOF  = 0x0020,
        _F_BIN  = 0x0040,
        _F_IN   = 0x0080,
        _F_OUT  = 0x0100,
        _F_TERM = 0x0200,
    }

    enum
    {
        _IOFBF = 0,
        _IOLBF = 1,
        _IONBF = 2,
    }

    alias int fpos_t;
    extern FILE *stdin;
    extern FILE *stdout;
    extern FILE *stderr;

    FILE * fopen64(in char *,in char *);        ///

    int  ferror(FILE *fp);
    int  feof(FILE *fp);
    void clearerr(FILE *fp);
    void rewind(FILE *fp);
    int  _bufsize(FILE *fp);
    int  fileno(FILE *fp);
    int  snprintf(char *,size_t,char *,...);
    int  vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode);  ///
}
else version (OSX)
{
    const int EOF = -1;
    const int BUFSIZ = 1024;
    const int FOPEN_MAX = 20;
    const int FILENAME_MAX = 1024;
    const int TMP_MAX = 308915776;
    const int L_tmpnam = 1024;

    struct __sbuf
    {
        char* _base;
        int _size;
    }

    struct _iobuf
    {
        align (1):

        char* _p;
        int _r;
        int _w;
        short _flags;
        short _file;
        __sbuf _bf;
        int _lbfsize;
        void* _cookie;
        int function(void*) _close;
        int function(void*, char*, int) _read;
        fpos_t function(void*, fpos_t, int) _seek;
        int function(void*, char*, int) _write;
        __sbuf _ub;
        void* _extra;
        int _ur;
        char[3] _ubuf;
        char[1] _nbuf;
        __sbuf _lb;
        int _blksize;
        fpos_t _offset;
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    alias _iobuf FILE;  ///

    enum
    {
        _F_RDWR = 0x0003,
        _F_READ = 0x0001,
        _F_WRIT = 0x0002,
        _F_BUF  = 0x0004,
        _F_LBUF = 0x0008,
        _F_ERR  = 0x0010,
        _F_EOF  = 0x0020,
        _F_BIN  = 0x0040,
        _F_IN   = 0x0080,
        _F_OUT  = 0x0100,
        _F_TERM = 0x0200,
    }

    enum
    {
        _IOFBF = 0,
        _IOLBF = 1,
        _IONBF = 2,
    }

    alias long fpos_t;

    extern FILE *__stdinp;
    extern FILE *__stdoutp;
    extern FILE *__stderrp;

    alias __stdinp stdin;
    alias __stdoutp stdout;
    alias __stderrp stderr;

    int  ferror(FILE *fp);
    int  feof(FILE *fp);
    void clearerr(FILE *fp);
    void rewind(FILE *fp);
    int  _bufsize(FILE *fp);
    int  fileno(FILE *fp);
    int  snprintf(char *,size_t,char *,...);
    int  vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode);  ///
}
else version (FreeBSD)
{
    const int EOF = -1;
    const int BUFSIZ = 1024;
    const int FOPEN_MAX = 20;
    const int FILENAME_MAX = 1024;
    const int TMP_MAX = 308915776;
    const int L_tmpnam = 1024;

    struct __sbuf
    {
        char* _base;
        int _size;
    }

    struct _iobuf
    {
        align (1):

        char* _p;
        int _r;
        int _w;
        short _flags;
        short _file;
        __sbuf _bf;
        int _lbfsize;
        void* _cookie;
        int function(void*) _close;
        int function(void*, char*, int) _read;
        fpos_t function(void*, fpos_t, int) _seek;
        int function(void*, char*, int) _write;
        __sbuf _ub;
        void* _extra;
        int _ur;
        char[3] _ubuf;
        char[1] _nbuf;
        __sbuf _lb;
        int _blksize;
        fpos_t _offset;
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    alias _iobuf FILE;  ///

    enum
    {
        _F_RDWR = 0x0003,
        _F_READ = 0x0001,
        _F_WRIT = 0x0002,
        _F_BUF  = 0x0004,
        _F_LBUF = 0x0008,
        _F_ERR  = 0x0010,
        _F_EOF  = 0x0020,
        _F_BIN  = 0x0040,
        _F_IN   = 0x0080,
        _F_OUT  = 0x0100,
        _F_TERM = 0x0200,
    }

    enum
    {
        _IOFBF = 0,
        _IOLBF = 1,
        _IONBF = 2,
    }

    alias long fpos_t;

    extern FILE *__stdinp;
    extern FILE *__stdoutp;
    extern FILE *__stderrp;

    alias __stdinp stdin;
    alias __stdoutp stdout;
    alias __stderrp stderr;

    int  ferror(FILE *fp);
    int  feof(FILE *fp);
    void clearerr(FILE *fp);
    void rewind(FILE *fp);
    int  _bufsize(FILE *fp);
    int  fileno(FILE *fp);
    int  snprintf(char *,size_t,char *,...);
    int  vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode);  ///
}
else version (OpenBSD)
{
    const int EOF = -1;
    const int BUFSIZ = 1024;
    const int FOPEN_MAX = 20;
    const int FILENAME_MAX = 1024;
    const int TMP_MAX = 308915776;
    const int L_tmpnam = 1024;

    alias off_t fpos_t;

    struct __sbuf
    {
        char* _base;
        int _size;
    }

    struct FILE
    {
        char* _p;
        int     _r;
        int     _w;
        short   _flags;
        short   _file;
        __sbuf _bf;
        int     _lbfsize;

        void    *_cookie;
        int     (*_close)(void *);
        int     (*_read)(void *, char *, int);
        fpos_t  (*_seek)(void *, fpos_t, int);
        int     (*_write)(void *, char *, int);

        __sbuf _ext;
        char *_up;
        int     _ur;
        char _ubuf[3];
        char _nbuf[1];
        __sbuf _lb;
        int     _blksize;
        fpos_t  _offset;
    }


    extern FILE __sF[];

    const FILE *stdin  = &__sF[0];      ///
    const FILE *stdout = &__sF[1];      ///
    const FILE *stderr = &__sF[2];      ///

    enum
    {
        _IOFBF = 0,
        _IOLBF = 1,
        _IONBF = 2,
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    int ferror(FILE *);
    int feof(FILE *);
    void clearerr(FILE *);
    void rewind(FILE *);
    int fileno(FILE *);
    int snprintf(char *, size_t, char *, ...);
    int vsnprintf(char *, size_t, char *, va_list);
    int fseeko(FILE *, off_t, int);
    off_t ftello(FILE *);

    int fwide(FILE* fp, int mode);  ///
}
else version (Solaris)
{
    const int EOF = -1;
    const int BUFSIZ = 1024;
    const int FOPEN_MAX = 20;
    const int FILENAME_MAX = 1024;
    const int TMP_MAX = 17576;
    const int L_tmpnam = 25;
    const int _NFILE = 20;

    struct __sbuf
    {
       char* _base;
       int _size;
    }

    struct _iobuf
    {
       align (1):

       int _cnt;
       ubyte* _ptr;
       ubyte* _base;
       ubyte _flag;
       ubyte _magic;
       ubyte[2] __bitflags;
    }

    enum { SEEK_SET, SEEK_CUR, SEEK_END }

    alias _iobuf FILE; ///

    enum
    {
       _IOFBF = 0000,
       _IOLBF = 0100,
       _IONBF = 0200,
    }

    alias long fpos_t;

    extern FILE _iob[_NFILE];

    const FILE *stdin  = &_iob[0];     ///
    const FILE *stdout = &_iob[1];     ///
    const FILE *stderr = &_iob[2];     ///

    int  ferror(FILE *fp);
    int  feof(FILE *fp);
    void clearerr(FILE *fp);
    void rewind(FILE *fp);
    int  _bufsize(FILE *fp);
    int  fileno(FILE *fp);
    int  snprintf(char *,size_t,char *,...);
    int  vsnprintf(char *,size_t,char *,va_list);

    int fwide(FILE* fp, int mode);  ///
}
else
{
    static assert(0);
}

char *   tmpnam(char *);        ///
FILE *   fopen(in char *,in char *);    ///
FILE *   _fsopen(in char *,in char *,int );     ///
FILE *   freopen(in char *,in char *,FILE *);   ///
int      fseek(FILE *,int,int); ///
int      ftell(FILE *); ///
char *   fgets(char *,int,FILE *);      ///
int      fgetc(FILE *); ///
int      _fgetchar();   ///
int      fflush(FILE *);        ///
int      fclose(FILE *);        ///
int      fputs(char *,FILE *);  ///
char *   gets(char *);  ///
int      fputc(int,FILE *);     ///
int      _fputchar(int);        ///
int      puts(char *);  ///
int      ungetc(int,FILE *);    ///
size_t   fread(void *,size_t,size_t,FILE *);    ///
size_t   fwrite(void *,size_t,size_t,FILE *);   ///
//int    printf(char *,...);    ///
int      fprintf(FILE *,char *,...);    ///
int      vfprintf(FILE *,char *,va_list);       ///
int      vprintf(char *,va_list);       ///
int      sprintf(char *,char *,...);    ///
int      vsprintf(char *,char *,va_list);       ///
int      scanf(char *,...);     ///
int      fscanf(FILE *,char *,...);     ///
int      sscanf(char *,char *,...);     ///
void     setbuf(FILE *,char *); ///
int      setvbuf(FILE *,char *,int,size_t);     ///
int      remove(char *);        ///
int      rename(char *,char *); ///
void     perror(char *);        ///
int      fgetpos(FILE *,fpos_t *);      ///
int      fsetpos(FILE *,fpos_t *);      ///
FILE *   tmpfile();     ///
int      _rmtmp();
int      _fillbuf(FILE *);
int      _flushbu(int, FILE *);

int  getw(FILE *FHdl);  ///
int  putw(int Word, FILE *FilePtr);     ///

///
int  getchar()          { return getc(stdin);           }
///
int  putchar(int c)     { return putc(c,stdout);        }
///
int  getc(FILE *fp)     { return fgetc(fp);             }
///
int  putc(int c,FILE *fp) { return fputc(c,fp);         }

int      unlink(char *);        ///
FILE *   fdopen(int, char *);   ///
int      fgetchar();    ///
int      fputchar(int); ///
int      fcloseall();   ///
int      filesize(char *);      ///
int      flushall();    ///
int      getch();       ///
int      getche();      ///
int      kbhit();       ///
char *   tempnam (char *dir, char *pfx);        ///

wchar_t *  _wtmpnam(wchar_t *); ///
FILE *  _wfopen(wchar_t *, wchar_t *);
FILE *  _wfsopen(wchar_t *, wchar_t *, int);
FILE *  _wfreopen(wchar_t *, wchar_t *, FILE *);
wchar_t *  fgetws(wchar_t *, int, FILE *);      ///
int  fputws(wchar_t *, FILE *); ///
wchar_t *  _getws(wchar_t *);
int  _putws(wchar_t *);
int  wprintf(wchar_t *, ...);   ///
int  fwprintf(FILE *, wchar_t *, ...);  ///
int  vwprintf(wchar_t *, va_list);      ///
int  vfwprintf(FILE *, wchar_t *, va_list);     ///
int  swprintf(wchar_t *, wchar_t *, ...);       ///
int  vswprintf(wchar_t *, wchar_t *, va_list);  ///
int  _snwprintf(wchar_t *, size_t, wchar_t *, ...);
int  _vsnwprintf(wchar_t *, size_t, wchar_t *, va_list);
int  wscanf(wchar_t *, ...);    ///
int  fwscanf(FILE *, wchar_t *, ...);   ///
int  swscanf(wchar_t *, wchar_t *, ...);        ///
int  _wremove(wchar_t *);
void  _wperror(wchar_t *);
FILE *  _wfdopen(int, wchar_t *);
wchar_t *  _wtempnam(wchar_t *, wchar_t *);
wchar_t  fgetwc(FILE *);        ///
wchar_t  _fgetwchar_t();
wchar_t  fputwc(wchar_t, FILE *);       ///
wchar_t  _fputwchar_t(wchar_t);
wchar_t  ungetwc(wchar_t, FILE *);      ///

///
wchar_t  getwchar_t()           { return fgetwc(stdin); }
///
wchar_t  putwchar_t(wchar_t c)  { return fputwc(c,stdout); }
///
wchar_t  getwc(FILE *fp); //        { return fgetwc(fp); }
///
wchar_t  putwc(wchar_t c, FILE *fp); //     { return fputwc(c, fp); }