JehanneOS/newlib
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2005-04-05 Dave Korn <dave.korn@artimi.com>

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* libc/stdio/vfscanf.c (__svfscanf_r): If an error occurs processing
        something that looks like a "NaN", put back the characters processed.
This commit is contained in:
Jeff Johnston 2005-04-05 18:38:09 +00:00
parent 42aa06a575
commit 85da703991
2 changed files with 24 additions and 2 deletions
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5
newlib/ChangeLog
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@ -1,3 +1,8 @@
2005-04-05 Dave Korn <dave.korn@artimi.com>
* libc/stdio/vfscanf.c (__svfscanf_r): If an error occurs processing
something that looks like a "NaN", put back the characters processed.
2005-04-01 Corinna Vinschen <corinna@vinschen.de>
* libc/stdlib/strtod.c (_strtod_r): Never change s00.

21
newlib/libc/stdio/vfscanf.c
View File

@ -1111,7 +1111,24 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
}
if (zeroes)
flags &= ~NDIGITS;
/*
/* We may have a 'N' or possibly even a 'Na' as the start of 'NaN',
only to run out of chars before it was complete (or having
encountered a non- matching char). So check here if we have an
outstanding nancount, and if so put back the chars we did
swallow and treat as a failed match. */
if (nancount && nancount != 3)
{
/* Ok... what are we supposed to do in the event that the
__srefill call above was triggered in the middle of the partial
'NaN' and so we can't put it all back? */
while (nancount-- && (p > buf))
{
ungetc (*(u_char *)--p, fp);
--nread;
}
goto match_failure;
}
/*
* If no digits, might be missing exponent digits
* (just give back the exponent) or might be missing
* regular digits, but had sign and/or decimal point.
@ -1123,7 +1140,7 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
/* no digits at all */
while (p > buf)
{
ungetc (*(u_char *)-- p, fp);
ungetc (*(u_char *)--p, fp);
--nread;
}
goto match_failure;