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msvcrt: Handle negative zero, infinity and nan in _ecvt and others. 

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50885
Signed-off-by: Lauri Kenttä <lauri.kentta@gmail.com>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
(cherry picked from commit 97b420224e)
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
This commit is contained in:
Lauri Kenttä 2021-04-01 20:58:46 +02:00 committed by Michael Stefaniuc
parent 7dfaf25939
commit ae66cb71b4
2 changed files with 35 additions and 39 deletions
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63
dlls/msvcrt/math.c
View File

@ -2400,21 +2400,22 @@ char * CDECL _ecvt( double number, int ndigits, int *decpt, int *sign )
int prec, len;
thread_data_t *data = msvcrt_get_thread_data();
/* FIXME: check better for overflow (native supports over 300 chars) */
ndigits = min( ndigits, 80 - 7); /* 7 : space for dec point, 1 for "e",
ndigits = min( ndigits, 80 - 8); /* 8 : space for sign, dec point, "e",
* 4 for exponent and one for
* terminating '\0' */
if (!data->efcvt_buffer)
data->efcvt_buffer = malloc( 80 ); /* ought to be enough */
if( number < 0) {
*sign = TRUE;
number = -number;
} else
*sign = FALSE;
/* handle cases with zero ndigits or less */
prec = ndigits;
if( prec < 1) prec = 2;
len = _snprintf(data->efcvt_buffer, 80, "%.*le", prec - 1, number);
if (data->efcvt_buffer[0] == '-') {
memmove( data->efcvt_buffer, data->efcvt_buffer + 1, len-- );
*sign = 1;
} else *sign = 0;
/* take the decimal "point away */
if( prec != 1)
memmove( data->efcvt_buffer + 1, data->efcvt_buffer + 2, len - 1 );
@ -2443,7 +2444,6 @@ int CDECL _ecvt_s( char *buffer, size_t length, double number, int ndigits, int
{
int prec, len;
char *result;
const char infret[] = "1#INF";
if (!MSVCRT_CHECK_PMT(buffer != NULL)) return EINVAL;
if (!MSVCRT_CHECK_PMT(decpt != NULL)) return EINVAL;
@ -2451,30 +2451,17 @@ int CDECL _ecvt_s( char *buffer, size_t length, double number, int ndigits, int
if (!MSVCRT_CHECK_PMT_ERR( length > 2, ERANGE )) return ERANGE;
if (!MSVCRT_CHECK_PMT_ERR(ndigits < (int)length - 1, ERANGE )) return ERANGE;
/* special case - inf */
if(number == HUGE_VAL || number == -HUGE_VAL)
{
memset(buffer, '0', ndigits);
memcpy(buffer, infret, min(ndigits, sizeof(infret) - 1 ) );
buffer[ndigits] = '\0';
(*decpt) = 1;
if(number == -HUGE_VAL)
(*sign) = 1;
else
(*sign) = 0;
return 0;
}
/* handle cases with zero ndigits or less */
prec = ndigits;
if( prec < 1) prec = 2;
result = malloc(prec + 7);
result = malloc(prec + 8);
len = _snprintf(result, prec + 8, "%.*le", prec - 1, number);
if (result[0] == '-') {
memmove( result, result + 1, len-- );
*sign = 1;
} else *sign = 0;
if( number < 0) {
*sign = TRUE;
number = -number;
} else
*sign = FALSE;
len = _snprintf(result, prec + 7, "%.*le", prec - 1, number);
/* take the decimal "point away */
if( prec != 1)
memmove( result + 1, result + 2, len - 1 );
@ -2511,12 +2498,6 @@ char * CDECL _fcvt( double number, int ndigits, int *decpt, int *sign )
if (!data->efcvt_buffer)
data->efcvt_buffer = malloc( 80 ); /* ought to be enough */
if (number < 0)
{
*sign = 1;
number = -number;
} else *sign = 0;
stop = _snprintf(buf, 80, "%.*f", ndigits < 0 ? 0 : ndigits, number);
ptr1 = buf;
ptr2 = data->efcvt_buffer;
@ -2524,6 +2505,11 @@ char * CDECL _fcvt( double number, int ndigits, int *decpt, int *sign )
dec1 = 0;
dec2 = 0;
if (*ptr1 == '-') {
*sign = 1;
ptr1++;
} else *sign = 0;
/* For numbers below the requested resolution, work out where
the decimal point will be rather than finding it in the string */
if (number < 1.0 && number > 0.0) {
@ -2595,12 +2581,6 @@ int CDECL _fcvt_s(char* outbuffer, size_t size, double number, int ndigits, int
return EINVAL;
}
if (number < 0)
{
*sign = 1;
number = -number;
} else *sign = 0;
stop = _snprintf(buf, 80, "%.*f", ndigits < 0 ? 0 : ndigits, number);
ptr1 = buf;
ptr2 = outbuffer;
@ -2608,6 +2588,11 @@ int CDECL _fcvt_s(char* outbuffer, size_t size, double number, int ndigits, int
dec1 = 0;
dec2 = 0;
if (*ptr1 == '-') {
*sign = 1;
ptr1++;
} else *sign = 0;
/* For numbers below the requested resolution, work out where
the decimal point will be rather than finding it in the string */
if (number < 1.0 && number > 0.0) {

11
dlls/msvcrt/tests/printf.c
View File

@ -643,6 +643,9 @@ static struct {
{ 0.0, 5, "00000", "00000", 0, 0, 0 },
{ 0.0, 0, "", "", 0, 0, 0 },
{ 0.0, -1, "", "", 0, 0, 0 },
{ -0.0, 5, "00000", "00000", 0, 0, 1 },
{ -0.0, 0, "", "", 0, 0, 1 },
{ -0.0, -1, "", "", 0, 0, 1 },
{ -123.0001, 0, "", "123", 3, 3, 1 },
{ -123.0001, -1, "", "12", 3, 3, 1 },
{ -123.0001, -2, "", "1", 3, 3, 1 },
@ -656,6 +659,14 @@ static struct {
{ 0.4, 0, "", "", 0, 0, 0 },
{ 0.49, 0, "", "", 0, 0, 0 },
{ 0.51, 0, "", "1", 1, 1, 0 },
{ NAN, 2, "1$", "1#R", 1, 1, 0 },
{ NAN, 5, "1#QNB", "1#QNAN", 1, 1, 0 },
{ -NAN, 2, "1$", "1#J", 1, 1, 1 },
{ -NAN, 5, "1#IND", "1#IND0", 1, 1, 1 },
{ INFINITY, 2, "1$", "1#J", 1, 1, 0 },
{ INFINITY, 5, "1#INF", "1#INF0", 1, 1, 0 },
{ -INFINITY, 2, "1$", "1#J", 1, 1, 1 },
{ -INFINITY, 5, "1#INF", "1#INF0", 1, 1, 1 },
{ 1.0, 30, "100000000000000000000000000000",
"1000000000000000000000000000000", 1, 1, 0},
{ 123456789012345678901.0, 30, "123456789012345680000000000000",