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Leonid Fedorov
2022-01-21 16:43:49 +00:00
parent 6b6411229f
commit 04752ec546
1376 changed files with 393460 additions and 412662 deletions
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227
utils/funcexp/func_rtrim_oracle.cpp
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@ -16,10 +16,10 @@
MA 02110-1301, USA. */
/****************************************************************************
* $Id: func_rtrim.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/
* $Id: func_rtrim.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/
#include <string>
using namespace std;
@ -34,134 +34,131 @@ using namespace rowgroup;
#include "joblisttypes.h"
using namespace joblist;
namespace funcexp
{
CalpontSystemCatalog::ColType Func_rtrim_oracle::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
CalpontSystemCatalog::ColType Func_rtrim_oracle::operationType(FunctionParm& fp,
CalpontSystemCatalog::ColType& resultType)
{
// operation type is not used by this functor
return fp[0]->data()->resultType();
// operation type is not used by this functor
return fp[0]->data()->resultType();
}
std::string Func_rtrim_oracle::getStrVal(rowgroup::Row& row,
FunctionParm& fp,
bool& isNull,
execplan::CalpontSystemCatalog::ColType& type)
std::string Func_rtrim_oracle::getStrVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
execplan::CalpontSystemCatalog::ColType& type)
{
CHARSET_INFO* cs = type.getCharset();
// The original string
const string& src = fp[0]->data()->getStrVal(row, isNull);
if (isNull)
return "";
if (src.empty() || src.length() == 0)
return src;
// binLen represents the number of bytes in src
size_t binLen = src.length();
const char* pos = src.c_str();
const char* end = pos + binLen;
// strLen = the number of characters in src
size_t strLen = cs->numchars(pos, end);
CHARSET_INFO* cs = type.getCharset();
// The original string
const string& src = fp[0]->data()->getStrVal(row, isNull);
if (isNull)
return "";
if (src.empty() || src.length() == 0)
return src;
// binLen represents the number of bytes in src
size_t binLen = src.length();
const char* pos = src.c_str();
const char* end = pos + binLen;
// strLen = the number of characters in src
size_t strLen = cs->numchars(pos, end);
// The trim characters.
const string& trim = (fp.size() > 1 ? fp[1]->data()->getStrVal(row, isNull) : " ");
// binTLen represents the number of bytes in trim
size_t binTLen = trim.length();
const char* posT = trim.c_str();
// strTLen = the number of characters in trim
size_t strTLen = cs->numchars(posT, posT+binTLen);
if (strTLen == 0 || strTLen > strLen)
return src;
// The trim characters.
const string& trim = (fp.size() > 1 ? fp[1]->data()->getStrVal(row, isNull) : " ");
// binTLen represents the number of bytes in trim
size_t binTLen = trim.length();
const char* posT = trim.c_str();
// strTLen = the number of characters in trim
size_t strTLen = cs->numchars(posT, posT + binTLen);
if (strTLen == 0 || strTLen > strLen)
return src;
if (binTLen == 1)
if (binTLen == 1)
{
const char* ptr = pos;
if (cs->use_mb()) // This is a multi-byte charset
{
const char* ptr = pos;
if (cs->use_mb()) // This is a multi-byte charset
const char* p = pos;
uint32 l;
// Multibyte characters in the string give us alignment problems
// What we do here is skip past any multibyte characters. Whn
// don with this loop, ptr is pointing to a singlebyte char that
// is after all multibyte chars in the string, or to end.
while (ptr < end)
{
if ((l = my_ismbchar(cs, ptr,
end))) // returns the number of bytes in the leading char or zero if one byte
{
const char* p = pos;
uint32 l;
// Multibyte characters in the string give us alignment problems
// What we do here is skip past any multibyte characters. Whn
// don with this loop, ptr is pointing to a singlebyte char that
// is after all multibyte chars in the string, or to end.
while (ptr < end)
{
if ((l = my_ismbchar(cs, ptr, end))) // returns the number of bytes in the leading char or zero if one byte
{
ptr += l;
p = ptr;
}
else
{
++ptr;
}
}
ptr = p;
}
while (ptr < end && end[-1] == *posT)
{
--end;
--binLen;
}
}
else
{
// An uncommon case where the space character is > 1 byte
if (cs->use_mb()) // This is a multi-byte charset
{
// The problem is that the byte pattern at the end could
// match memcmp, but not be correct since the first byte compared
// may actually be a second or later byte from a previous char.
// We start at the beginning of the string and move forward
// one character at a time until we reach the end. Then we can
// safely compare and remove on character. Then back to the beginning
// and try again.
while (end - binTLen >= pos)
{
const char* p = pos;
uint32 l;
while (p + binTLen < end)
{
if ((l = my_ismbchar(cs, p, end))) // returns the number of bytes in the leading char or zero if one byte
p += l;
else
++p;
}
if (p + binTLen == end && memcmp(p,posT,binTLen) == 0)
{
end -= binTLen;
binLen -= binTLen;
}
else
{
break; // We've run out of places to look
}
}
ptr += l;
p = ptr;
}
else
{
// This implies we have a single byte charset and a multibyte
// space character.
// Should never get here, since rtrim only trims space characters
// Included for completeness.
while (end-binTLen >= pos && memcmp(end-binTLen,posT,binTLen) == 0)
{
end -= binTLen;
binLen -= binTLen;
}
++ptr;
}
}
ptr = p;
}
// Turn back to a string
std::string ret(pos, binLen);
if (binLen == 0)
while (ptr < end && end[-1] == *posT)
{
isNull = true;
--end;
--binLen;
}
return ret;
}
else
{
// An uncommon case where the space character is > 1 byte
if (cs->use_mb()) // This is a multi-byte charset
{
// The problem is that the byte pattern at the end could
// match memcmp, but not be correct since the first byte compared
// may actually be a second or later byte from a previous char.
// We start at the beginning of the string and move forward
// one character at a time until we reach the end. Then we can
// safely compare and remove on character. Then back to the beginning
// and try again.
while (end - binTLen >= pos)
{
const char* p = pos;
uint32 l;
while (p + binTLen < end)
{
if ((l = my_ismbchar(cs, p,
end))) // returns the number of bytes in the leading char or zero if one byte
p += l;
else
++p;
}
if (p + binTLen == end && memcmp(p, posT, binTLen) == 0)
{
end -= binTLen;
binLen -= binTLen;
}
else
{
break; // We've run out of places to look
}
}
}
else
{
// This implies we have a single byte charset and a multibyte
// space character.
// Should never get here, since rtrim only trims space characters
// Included for completeness.
while (end - binTLen >= pos && memcmp(end - binTLen, posT, binTLen) == 0)
{
end -= binTLen;
binLen -= binTLen;
}
}
}
// Turn back to a string
std::string ret(pos, binLen);
if (binLen == 0)
{
isNull = true;
}
return ret;
}
} // namespace funcexp
} // namespace funcexp
// vim:ts=4 sw=4: