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Fix MinGW-Bug [2136252]: Remove extraneous radix point in printf( "%.0f", v ) for v < 0.5

This commit is contained in:
Keith Marshall 2008-10-18 14:33:48 +00:00
parent edf5a5bd15
commit 87ab6bfb62
2 changed files with 41 additions and 32 deletions
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8
winsup/mingw/ChangeLog
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@ -1,3 +1,11 @@
2008-10-18 Keith Marshall <keithmarshall@users.sourceforge.net>
Fix MinGW-Bug [2136252]: (Reported by Roumen Petrov).
Remove extraneous radix point in printf( "%.0f", v ) for v < 0.5
* mingwex/stdio/pformat.c (__pformat_emit_float): Always make output
of radix point conditional on precision != 0 or `#' flag specified.
2008-10-13 Keith Marshall <keithmarshall@users.sourceforge.net>
Fix MinGW-Bug [2160227]

65
winsup/mingw/mingwex/stdio/pformat.c
View File

@ -528,7 +528,7 @@ void __pformat_int( __pformat_intarg_t value, __pformat_t *stream )
&& ((stream->flags & PFORMAT_JUSTIFY) == PFORMAT_ZEROFILL) )
/*
* and the `0' flag is in effect, so we pad the remaining spaces,
* to the left of the displayed value, with zeroes.
* to the left of the displayed value, with zeros.
*/
while( stream->width-- > 0 )
*p++ = '0';
@ -665,7 +665,7 @@ void __pformat_xint( int fmt, __pformat_intarg_t value, __pformat_t *stream )
&& ((stream->flags & PFORMAT_JUSTIFY) == PFORMAT_ZEROFILL) )
/*
* When the `0' flag is set, and not overridden by the `-' flag,
* or by a specified precision, add sufficient leading zeroes to
* or by a specified precision, add sufficient leading zeros to
* consume the remaining field width.
*/
while( width-- > 0 )
@ -1034,7 +1034,7 @@ void __pformat_emit_float( int sign, char *value, int len, __pformat_t *stream )
* adjusting appropriately, when sufficient width remains...
* (note that we must check both of these conditions, because
* precision may be more negative than width, as a result of
* adjustment to provide extra padding when trailing zeroes
* adjustment to provide extra padding when trailing zeros
* are to be discarded from "%g" format conversion with a
* specified field width, but if width itself is negative,
* then there is explicitly to be no padding anyway).
@ -1098,12 +1098,19 @@ void __pformat_emit_float( int sign, char *value, int len, __pformat_t *stream )
/* Emit the digits of the encoded numeric value...
*/
if( len > 0 )
{
/* beginning with those which precede the radix point,
* and appending any necessary significant trailing zeroes.
/*
* ...beginning with those which precede the radix point,
* and appending any necessary significant trailing zeros.
*/
while( len-- > 0 )
__pformat_putc( *value ? *value++ : '0', stream );
do __pformat_putc( *value ? *value++ : '0', stream );
while( --len > 0 );
else
/* The magnitude of the encoded value is less than 1.0, so no
* digits precede the radix point; we emit a mandatory initial
* zero, followed immediately by the radix point.
*/
__pformat_putc( '0', stream );
/* Unless the encoded value is integral, AND the radix point
* is not expressly demanded by the `#' flag, we must insert
@ -1111,29 +1118,23 @@ void __pformat_emit_float( int sign, char *value, int len, __pformat_t *stream )
*/
if( (stream->precision > 0) || (stream->flags & PFORMAT_HASHED) )
__pformat_emit_radix_point( stream );
}
else
{
/* The magnitude of the encoded value is less than 1.0, so no
* digits precede the radix point; we emit a mandatory initial
* zero, followed immediately by the radix point.
/* When the radix point offset, `len', is negative, this implies
* that additional zeros must appear, following the radix point,
* and preceding the first significant digit...
*/
__pformat_putc( '0', stream );
__pformat_emit_radix_point( stream );
/* The radix point offset, `len', may be negative; this implies
* that additional zeroes must appear, following the radix point,
* and preceding the first significant digit. We reduce the
* precision, (adding a negative value), to allow for these
* additional zeroes, then emit the zeroes as required.
if( len < 0 )
{
/* To accommodate these, we adjust the precision, (reducing it
* by adding a negative value), and then we emit as many zeros
* as are required.
*/
stream->precision += len;
while( len++ < 0 )
__pformat_putc( '0', stream );
do __pformat_putc( '0', stream );
while( ++len < 0 );
}
/* Now we emit any remaining significant digits, or trailing zeroes,
/* Now we emit any remaining significant digits, or trailing zeros,
* until the required precision has been achieved.
*/
while( stream->precision-- > 0 )
@ -1340,12 +1341,12 @@ void __pformat_gfloat( long double x, __pformat_t *stream )
/* The `#' flag is not in effect...
* Here we adjust the precision to accommodate all digits which
* precede the radix point, but we truncate any balance following
* it, to suppress output of non-significant trailing zeroes...
* it, to suppress output of non-significant trailing zeros...
*/
if( ((stream->precision = strlen( value ) - intlen) < 0)
/*
* This may require a compensating adjustment to the field
* width, to accommodate significant trailing zeroes, which
* width, to accommodate significant trailing zeros, which
* precede the radix point...
*/
&& (stream->width > 0) )
@ -1375,7 +1376,7 @@ void __pformat_gfloat( long double x, __pformat_t *stream )
* The `#' flag is in effect...
* Adjust precision to emit the specified number of significant
* digits, with one preceding the radix point, and the balance
* following it, retaining any non-significant trailing zeroes
* following it, retaining any non-significant trailing zeros
* which are required to exactly match the requested precision...
*/
stream->precision--;
@ -1384,7 +1385,7 @@ void __pformat_gfloat( long double x, __pformat_t *stream )
/* The `#' flag is not in effect...
* Adjust precision to emit only significant digits, with one
* preceding the radix point, and any others following it, but
* suppressing non-significant trailing zeroes...
* suppressing non-significant trailing zeros...
*/
stream->precision = strlen( value ) - 1;
@ -1516,7 +1517,7 @@ void __pformat_emit_xfloat( __pformat_fpreg_t value, __pformat_t *stream )
if( (c > 0) || (p > buf) || (stream->precision >= 0) )
/*
* Ignoring insignificant trailing zeroes, (unless required to
* Ignoring insignificant trailing zeros, (unless required to
* satisfy specified precision), store the current encoded digit
* into the pending output buffer, in LIFO order, and using the
* appropriate case for digits in the `A'..`F' range.
@ -1637,7 +1638,7 @@ void __pformat_emit_xfloat( __pformat_fpreg_t value, __pformat_t *stream )
while( p > buf )
__pformat_emit_numeric_value( *--p, stream );
/* followed by any additional zeroes needed to satisfy the
/* followed by any additional zeros needed to satisfy the
* precision specification...
*/
while( stream->precision-- > 0 )
@ -2433,7 +2434,7 @@ int __pformat( int flags, void *dest, int max, const char *fmt, va_list argv )
case '0':
/*
* May represent a flag, to activate the `pad with zeroes'
* May represent a flag, to activate the `pad with zeros'
* option, or it may simply be a digit in a width or in a
* precision specification...
*/