1 #ifndef SUBSTDIO_H

     2 #define SUBSTDIO_H

     3 

     4 typedef struct substdio {

     5   char *x;

     6   int p;

     7   int n;

     8   int fd;

     9   int (*op)();

    10 } substdio;

    11 

    12 #define SUBSTDIO_FDBUF(op,fd,buf,len) { (buf), 0, (len), (fd), (op) }

    13 

    14 extern void substdio_fdbuf();

    15 

    16 extern int substdio_flush();

    17 extern int substdio_put();

    18 extern int substdio_bput();

    19 extern int substdio_putflush();

    20 extern int substdio_puts();

    21 extern int substdio_bputs();

    22 extern int substdio_putsflush();

    23 

    24 extern int substdio_get();

    25 extern int substdio_bget();

    26 extern int substdio_feed();

    27 

    28 extern char *substdio_peek();

    29 extern void substdio_seek();

    30 

    31 #define substdio_fileno(s) ((s)->fd)

    32 

    33 #define SUBSTDIO_INSIZE 8192

    34 #define SUBSTDIO_OUTSIZE 8192

    35 

    36 #define substdio_PEEK(s) ( (s)->x + (s)->n )

    37 #define substdio_SEEK(s,len) ( ( (s)->p -= (len) ) , ( (s)->n += (len) ) )

    38 

    39 #define substdio_BPUTC(s,c) \

    40   ( ((s)->n != (s)->p) \

    41     ? ( (s)->x[(s)->p++] = (c), 0 ) \

    42     : substdio_bput((s),&(c),1) \

    43   )

    44 

    45 extern int substdio_copy();

    46 

    47 #endif