Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/lib/libxc/fscanf.c

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/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */

#define EMPTY (-1)
#define EOF   (-2)
#define TTY_IOC_NEXTC 0x0028

static int getch(int, int *);
static int ungetch(int, int *);
extern int _doscan(register char *, register int **, int (*)(), int (*)(), int, int);

int fscanf(int dev, char *fmt, int args)
{
        int     buf;

        buf = EMPTY;
        return(_doscan(fmt, (int **)&args, getch, ungetch, dev,(int) (int)&buf));
}

static int getch(int dev, int *buf)
{
        if( *buf != EOF && *buf != EMPTY)
        { *buf = getc(dev); }
        if( *buf != EOF )
        { *buf = control(dev, TTY_IOC_NEXTC, 0, 0); }
        return(*buf);
}

static int ungetch(int dev, int *buf)
{
        *buf = EMPTY;
        return(*buf);
}

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