Date: Mon, 20 Jul 92 09:50:29 +0100
From: buers AT dg1 DOT chemie DOT uni-konstanz DOT de (Dieter Buerssner)
To: Eric Backus <ericb AT lsid DOT hp DOT com>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu, dj AT ctron DOT com
Subject: Re: patch for doscan.c

Eric Backus writes:
 > > When you open a file in binary mode, fscanf does not work correctly.
 > > It doesn't consider '\r' as whitespace, so it fails on files with
 > > the usal MSDOS "\r\n" end of line. The following patch should help.
 > > If you want to try it, please let me know, whether it worked or not.
 > 
 > According to the ANSI C definition of fscanf(), "white space" in the
 > input stream consists of any combination of: space, tab, newline,
 > vertical tab, formfeed, and carriage return.  Those are ASCII
 > characters 0x20, 0x09, 0x0a, 0x0b, 0x0c, and 0x0d.
 > 
 > So, it appears that we still need to add cases for vertical tab ('\v')
 > and formfeed ('\f').

Thanks to Eric. Now all the cases Eric mentioned should work.

	Dieter

Dieter Buerssner  (B\"ur\ss{}ner) -- buers AT dg1 DOT chemie DOT uni-konstanz DOT de
Universitaet Konstanz -- Fakultaet Chemie -- Postfach 5560 
7750 Konstanz  -- Germany -- +49-7531-882021


*** /djgpp/libsrc/c/io/doscan.c	Tue Apr  7 22:45:26 1992
--- doscan.c	Sun Jul 19 20:05:08 1992
***************
*** 22,28 ****
  
  static char _sctab[256] = {
  	0,0,0,0,0,0,0,0,
! 	0,SPC,SPC,0,0,0,0,0,
  	0,0,0,0,0,0,0,0,
  	0,0,0,0,0,0,0,0,
  	SPC,0,0,0,0,0,0,0,
--- 22,29 ----
  
  static char _sctab[256] = {
  	0,0,0,0,0,0,0,0,
! /*	  \t  \n  \v  \f  \r        */
! 	0,SPC,SPC,SPC,SPC,SPC,0,0,
  	0,0,0,0,0,0,0,0,
  	0,0,0,0,0,0,0,0,
  	SPC,0,0,0,0,0,0,0,
***************
*** 80,87 ****
  
  	case ' ':
  	case '\n':
! 	case '\t': 
! 		while ((ch1 = getc(iop))==' ' || ch1=='\t' || ch1=='\n')
  			;
  		if (ch1 != EOF)
  			ungetc(ch1, iop);
--- 81,91 ----
  
  	case ' ':
  	case '\n':
! 	case '\t':
! 	case '\r':
! 	case '\f':
! 	case '\v':
! 		while (((ch1 = getc(iop)) != EOF) && (_sctab[ch1] & SPC))
  			;
  		if (ch1 != EOF)
  			ungetc(ch1, iop);
***************
*** 126,132 ****
  	np = numbuf;
  	expseen = 0;
  	negflg = 0;
! 	while ((c = getc(iop))==' ' || c=='\t' || c=='\n');
  	if (c=='-') {
  		negflg++;
  		*np++ = c;
--- 130,137 ----
  	np = numbuf;
  	expseen = 0;
  	negflg = 0;
! 	while (((c = getc(iop)) != EOF) && (_sctab[c] & SPC))
! 			;
  	if (c=='-') {
  		negflg++;
  		*np++ = c;