fscanf.c File Reference

Go to the source code of this file.

Macros
#define	EMPTY   (-1)
#define	EOF   (-2)

Functions
int	_doscan (register char *, register int **, int(*getc)(int, int), int(*ungetc)(int, int), int, int)
int	fscanf (int dev, char *fmt, int args)
int	getc (int)
	デバイスから1Byte読み込むgetc()のextern宣言 More...
static int	getch (int, int)
static int	ungetch (int, int)

Macro Definition Documentation

EMPTY

#define EMPTY   (-1)

Definition at line 4 of file fscanf.c.

Referenced by fscanf(), getch(), and ungetch().

EOF

#define EOF   (-2)

Definition at line 7 of file fscanf.c.

Referenced by getch().

Function Documentation

_doscan()

int _doscan	(	register char *	,
		register int **	,
		int(*)(int, int)	getc,
		int(*)(int, int)	ungetc,
		int	,
		int
	)

Definition at line 38 of file doscan.c.

References _getccl(), _innum(), EOF, getch(), isdigit, isupper, LONG, REGULAR, SHORT, tolower, and ungetch().

Referenced by fscanf().

{
    register int ch;
    int nmatch, len, ch1;
    int **ptr, fileended, size;

    nmatch = 0;
    fileended = 0;
    for (;;)
    {
        switch (ch = *fmt++)
        {
        case '\0':
            return (nmatch);
        case '%':
            if ((ch = *fmt++) == '%')
            {
                goto def;
            }
            ptr = 0;
            if (ch != '*')
            {
                ptr = argp++;
            }
            else
            {
                ch = *fmt++;
            }
            len = 0;
            size = REGULAR;
            while (isdigit(ch))
            {
                len = len * 10 + ch - '0';
                ch = *fmt++;
            }
            if (len == 0)
            {
                len = 30000;
            }
            if (ch == 'l')
            {
                ch = *fmt++;
                size = LONG;
            }
            else if (ch == 'h')
            {
                size = SHORT;
                ch = *fmt++;
            }
            else if (ch == '[')
            {
                fmt = _getccl(fmt);
            }
            if (isupper(ch))
            {
                ch = tolower(ch);
                size = LONG;
            }
            if (ch == '\0')
            {
                return (-1);
            }
            if (_innum
                (ptr, ch, len, size,
                 getch, ungetch, arg1, arg2, &fileended) && ptr)
            {
                nmatch++;
            }
            if (fileended)
            {
                return (nmatch ? nmatch : -1);
            }
            break;

        case ' ':
        case '\n':
        case '\t':
            while ((ch1 =
                    (*getch) (arg1,
                              arg2)) == ' ' || ch1 == '\t' || ch1 == '\n')
            {;
            }
            if (ch1 != EOF)
            {
                (*ungetch) (arg1, arg2);
            }
            break;

        default:
          def:
            ch1 = (*getch) (arg1, arg2);
            if (ch1 != ch)
            {
                if (ch1 == EOF)
                {
                    return (-1);
                }
                (*ungetch) (arg1, arg2);
                return nmatch;
            }
        }
    }
}

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fscanf()

int fscanf	(	int	dev,
		char *	fmt,
		int	args
	)

Definition at line 23 of file fscanf.c.

References _doscan(), EMPTY, getch(), and ungetch().

{
    int buf;

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

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getc()

int getc

(

int

)

デバイスから1Byte読み込むgetc()のextern宣言

Definition at line 9 of file getc.c.

References devtab, disable(), dentry::dvgetc, isbaddev, restore(), and SYSERR.

Referenced by getch().

{
    intmask     mask;       /* Saved interrupt mask     */
    struct dentry   *devptr;    /* Entry in device switch table */
    int32       retval;     /* Value to return to caller    */

    mask = disable();
    if (isbaddev(descrp)) {
        restore(mask);
        return SYSERR;
    }
    devptr = (struct dentry *) &devtab[descrp];
    retval = (*devptr->dvgetc) (devptr);
    restore(mask);
    return retval;
}

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getch()

static int getch ( int  dev, int  abuf  )

static

Definition at line 40 of file fscanf.c.

References EMPTY, EOF, and getc().

Referenced by _doscan(), _innum(), _instr(), and fscanf().

{
    int *buf = (int *)abuf;

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

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ungetch()

static int ungetch ( int  dev, int  abuf  )

static

Definition at line 60 of file fscanf.c.

References EMPTY.

Referenced by _doscan(), _innum(), and fscanf().

{
    int *buf = (int *)abuf;

    *buf = EMPTY;
    return (*buf);
}

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