diff options
| author | Eike Rathke <erack@redhat.com> | 2019-08-09 15:11:09 +0200 |
|---|---|---|
| committer | Eike Rathke <erack@redhat.com> | 2019-08-09 17:10:08 +0200 |
| commit | be8da97976658ff19b4dd010bff328cd3f424c1b (patch) | |
| tree | 5a071d1806a9b748da5fd5a3a4acf94b50d09db4 | |
| parent | 844f9fa6ba7108b12758202c5fd08daa2a707641 (diff) | |
Resolves: tdf#126766 fix rounding correction at start of negative values
doubleToString() is entered with an inaccuracy afflicted
fValue=-9999.9999999999927 for which the rounding into the next
magnitude incremented the '-' character to '.' instead of
appending a '1' (and '0' and then "000") thus yielded ".0000"
instead of "-10000"
This seems to have been always the case.
Change-Id: I66170defa71fec40ca0b85f68affde8eff0d5ccb
Reviewed-on: https://gerrit.libreoffice.org/77208
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins
| -rw-r--r-- | sal/rtl/math.cxx | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sal/rtl/math.cxx b/sal/rtl/math.cxx index 46b7ef88f3d0..d9ad08dfaf52 100644 --- a/sal/rtl/math.cxx +++ b/sal/rtl/math.cxx @@ -546,9 +546,13 @@ void doubleToString(typename T::String ** pResult, if (nDigit >= 10) { // after-treatment of up-rounding to the next decade sal_Int32 sLen = static_cast< long >(p-pBuf)-1; - if (sLen == -1) + if (sLen == -1 || (sLen == 0 && bSign)) { + // Assert that no one changed the logic we rely on. + assert(!bSign || *pBuf == static_cast< typename T::Char >('-')); p = pBuf; + if (bSign) + ++p; if (eFormat == rtl_math_StringFormat_F) { *p++ = static_cast< typename T::Char >('1'); @@ -568,6 +572,12 @@ void doubleToString(typename T::String ** pResult, for (sal_Int32 j = sLen; j >= 0; j--) { typename T::Char cS = pBuf[j]; + if (j == 0 && bSign) + { + // Do not touch leading minus sign put earlier. + assert(cS == static_cast< typename T::Char >('-')); + break; // for, this is the last character backwards. + } if (cS != cDecSeparator) { if (cS != static_cast< typename T::Char >('9')) @@ -578,7 +588,7 @@ void doubleToString(typename T::String ** pResult, else { pBuf[j] = static_cast< typename T::Char >('0'); - if (j == 0) + if (j == 0 || (j == 1 && bSign)) { if (eFormat == rtl_math_StringFormat_F) { // insert '1' |