Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!utastro!james
From: james@utastro.UUCP (James McCartney)
Newsgroups: comp.sys.mac.programmer
Subject: small bug in scanf in TC 4.0
Keywords: think c scanf bug
Message-ID: <4241@utastro.UUCP>
Date: 23 Aug 89 21:01:29 GMT
Organization: U. Texas, Astronomy, Austin, TX
Lines: 41


   Scanf.c saves characters to oblivion when doing %*s or %*[...]
Here's the change in scanf.c :


string:
                if (!F.haveWidth)
                        F.fieldWidth = INT_MAX;
                if (!F.suppress)
                        s = va_arg(arg, char *);
                for (; c != EOF; c = getc(fp), ++nread) {
                        --F.fieldWidth;
                        if (!testbit(c))
                                break;
                        F.valid = TRUE;
>                       *s++ = c;
                        if (F.fieldWidth == 0)
                                goto endstring;
                }
                ungetc(c, fp), --nread;



string:
                if (!F.haveWidth)
                        F.fieldWidth = INT_MAX;
                if (!F.suppress)
                        s = va_arg(arg, char *);
                for (; c != EOF; c = getc(fp), ++nread) {
                        --F.fieldWidth;
                        if (!testbit(c))
                                break;
                        F.valid = TRUE;
>                       if (!F.suppress)
>                               *s++ = c;
                        if (F.fieldWidth == 0)
                                goto endstring;
                }
                ungetc(c, fp), --nread;

--- James McCartney --- Univ. of Texas Astronomy