[unix-history] / usr / src / usr.bin / pascal / libpc / RESET.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)RESET.c 1.1 %G%";

#include "h00vars.h"
#include "h01errs.h"

RESET(filep, name, maxnamlen, datasize)

	register struct iorec	*filep;
	char			*name;
	int			maxnamlen;
	int			datasize;
{
	if (name == NULL && filep == INPUT && filep->fname[0] == '\0') {
		if (rewind(filep->fbuf)) {
			ERROR(ESEEK, filep->pfname);
			return;
		}
		filep->funit &= ~(EOFF | EOLN);
		filep->funit |= SYNC;
		return;
	}
	filep = GETNAME(filep, name, maxnamlen, datasize);
	filep->fbuf = fopen(filep->fname, "r");
	if (filep->fbuf == NULL) {
		if (filep->funit & TEMP) {
			filep->funit |= (EOFF | SYNC | FREAD);
			return;
		}
		ERROR(EOPEN, filep->pfname);
		return;
	}
	filep->funit |= (SYNC | FREAD);
	if (filep->fblk > PREDEF) {
		setbuf(filep->fbuf, &filep->buf[0]);
	}
}
Commit	Line	Data
a58c9769 KM	1	/* Copyright (c) 1979 Regents of the University of California */
	2
	3	static char sccsid[] = "@(#)RESET.c 1.1 %G%";
	4
	5	#include "h00vars.h"
	6	#include "h01errs.h"
	7
	8	RESET(filep, name, maxnamlen, datasize)
	9
	10	register struct iorec *filep;
	11	char *name;
	12	int maxnamlen;
	13	int datasize;
	14	{
	15	if (name == NULL && filep == INPUT && filep->fname[0] == '\0') {
	16	if (rewind(filep->fbuf)) {
	17	ERROR(ESEEK, filep->pfname);
	18	return;
	19	}
	20	filep->funit &= ~(EOFF \| EOLN);
	21	filep->funit \|= SYNC;
	22	return;
	23	}
	24	filep = GETNAME(filep, name, maxnamlen, datasize);
	25	filep->fbuf = fopen(filep->fname, "r");
	26	if (filep->fbuf == NULL) {
	27	if (filep->funit & TEMP) {
	28	filep->funit \|= (EOFF \| SYNC \| FREAD);
	29	return;
	30	}
	31	ERROR(EOPEN, filep->pfname);
	32	return;
	33	}
	34	filep->funit \|= (SYNC \| FREAD);
	35	if (filep->fblk > PREDEF) {
	36	setbuf(filep->fbuf, &filep->buf[0]);
	37	}
	38	}