From: Debian MySQL Maintainers <pkg-mysql-maint@lists.alioth.debian.org>
Date: Thu, 10 Aug 2017 20:40:28 +0200
Subject: mips-connect-unaligned
---
storage/connect/valblk.cpp | 41 ++++++++++++++++++-------------------
storage/connect/valblk.h | 51 +++++++++++++++++++++++++++++-----------------
2 files changed, 52 insertions(+), 40 deletions(-)
--- a/storage/connect/valblk.cpp
+++ b/storage/connect/valblk.cpp
@@ -268,14 +268,14 @@ bool TYPBLK<TYPE>::Init(PGLOBAL g, bool
template <class TYPE>
char *TYPBLK<TYPE>::GetCharString(char *p, int n)
{
- sprintf(p, Fmt, Typp[n]);
+ sprintf(p, Fmt, UnalignedRead(n));
return p;
} // end of GetCharString
template <>
char *TYPBLK<double>::GetCharString(char *p, int n)
{
- sprintf(p, Fmt, Prec, Typp[n]);
+ sprintf(p, Fmt, Prec, UnalignedRead(n));
return p;
} // end of GetCharString
@@ -291,7 +291,7 @@ void TYPBLK<TYPE>::SetValue(PVAL valp, i
ChkTyp(valp);
if (!(b = valp->IsNull()))
- Typp[n] = GetTypedValue(valp);
+ UnalignedWrite(n, GetTypedValue(valp));
else
Reset(n);
@@ -353,9 +353,9 @@ void TYPBLK<TYPE>::SetValue(PCSZ p, int
ulonglong val = CharToNumber(p, strlen(p), maxval, Unsigned, &minus);
if (minus && val < maxval)
- Typp[n] = (TYPE)(-(signed)val);
+ UnalignedWrite(n, (TYPE)(-(signed)val));
else
- Typp[n] = (TYPE)val;
+ UnalignedWrite(n, (TYPE)val);
SetNull(n, false);
} // end of SetValue
@@ -398,7 +398,7 @@ void TYPBLK<double>::SetValue(PCSZ p, in
throw Type;
} // endif Check
- Typp[n] = atof(p);
+ UnalignedWrite(n, atof(p));
SetNull(n, false);
} // end of SetValue
@@ -430,7 +430,7 @@ void TYPBLK<TYPE>::SetValue(PVBLK pv, in
ChkTyp(pv);
if (!(b = pv->IsNull(n2) && Nullable))
- Typp[n1] = GetTypedValue(pv, n2);
+ UnalignedWrite(n1, GetTypedValue(pv, n2));
else
Reset(n1);
@@ -481,10 +481,10 @@ void TYPBLK<TYPE>::SetMin(PVAL valp, int
{
CheckParms(valp, n)
TYPE tval = GetTypedValue(valp);
- TYPE& tmin = Typp[n];
+ TYPE tmin = UnalignedRead(n);
if (tval < tmin)
- tmin = tval;
+ UnalignedWrite(n, tval);
} // end of SetMin
@@ -496,10 +496,10 @@ void TYPBLK<TYPE>::SetMax(PVAL valp, int
{
CheckParms(valp, n)
TYPE tval = GetTypedValue(valp);
- TYPE& tmin = Typp[n];
+ TYPE tmin = UnalignedRead(n);
if (tval > tmin)
- tmin = tval;
+ UnalignedWrite(n, tval);
} // end of SetMax
@@ -513,8 +513,7 @@ void TYPBLK<TYPE>::SetValues(PVBLK pv, i
CheckType(pv)
TYPE *lp = ((TYPBLK*)pv)->Typp;
- for (int i = k; i < n; i++) // TODO
- Typp[i] = lp[i];
+ memcpy(Typp + k, lp + k, sizeof(TYPE) * n);
} // end of SetValues
#endif // 0
@@ -525,7 +524,7 @@ void TYPBLK<TYPE>::SetValues(PVBLK pv, i
template <class TYPE>
void TYPBLK<TYPE>::Move(int i, int j)
{
- Typp[j] = Typp[i];
+ UnalignedWrite(j, UnalignedRead(i));
MoveNull(i, j);
} // end of Move
@@ -539,7 +538,7 @@ int TYPBLK<TYPE>::CompVal(PVAL vp, int n
ChkIndx(n);
ChkTyp(vp);
#endif // _DEBUG
- TYPE mlv = Typp[n];
+ TYPE mlv = UnalignedRead(n);
TYPE vlv = GetTypedValue(vp);
return (vlv > mlv) ? 1 : (vlv < mlv) ? (-1) : 0;
@@ -551,8 +550,8 @@ int TYPBLK<TYPE>::CompVal(PVAL vp, int n
template <class TYPE>
int TYPBLK<TYPE>::CompVal(int i1, int i2)
{
- TYPE lv1 = Typp[i1];
- TYPE lv2 = Typp[i2];
+ TYPE lv1 = UnalignedRead(i1);
+ TYPE lv2 = UnalignedRead(i2);
return (lv1 > lv2) ? 1 : (lv1 < lv2) ? (-1) : 0;
} // end of CompVal
@@ -589,7 +588,7 @@ int TYPBLK<TYPE>::Find(PVAL vp)
TYPE n = GetTypedValue(vp);
for (i = 0; i < Nval; i++)
- if (n == Typp[i])
+ if (n == UnalignedRead(i))
break;
return (i < Nval) ? i : (-1);
@@ -605,7 +604,7 @@ int TYPBLK<TYPE>::GetMaxLength(void)
int i, n, m;
for (i = n = 0; i < Nval; i++) {
- m = sprintf(buf, Fmt, Typp[i]);
+ m = sprintf(buf, Fmt, UnalignedRead(i));
n = MY_MAX(n, m);
} // endfor i
@@ -1335,7 +1334,7 @@ char *DATBLK::GetCharString(char *p, int
char *vp;
if (Dvalp) {
- Dvalp->SetValue(Typp[n]);
+ Dvalp->SetValue(UnalignedRead(n));
vp = Dvalp->GetCharString(p);
} else
vp = TYPBLK<int>::GetCharString(p, n);
@@ -1351,7 +1350,7 @@ void DATBLK::SetValue(PCSZ p, int n)
if (Dvalp) {
// Decode the string according to format
Dvalp->SetValue_psz(p);
- Typp[n] = Dvalp->GetIntValue();
+ UnalignedWrite(n, Dvalp->GetIntValue());
} else
TYPBLK<int>::SetValue(p, n);
--- a/storage/connect/valblk.h
+++ b/storage/connect/valblk.h
@@ -139,6 +139,7 @@ class VALBLK : public BLOCK {
int Prec; // Precision of float values
}; // end of class VALBLK
+
/***********************************************************************/
/* Class TYPBLK: represents a block of typed values. */
/***********************************************************************/
@@ -151,40 +152,41 @@ class TYPBLK : public VALBLK {
// Implementation
virtual bool Init(PGLOBAL g, bool check);
virtual int GetVlen(void) {return sizeof(TYPE);}
- virtual char GetTinyValue(int n) {return (char)Typp[n];}
- virtual uchar GetUTinyValue(int n) {return (uchar)Typp[n];}
- virtual short GetShortValue(int n) {return (short)Typp[n];}
- virtual ushort GetUShortValue(int n) {return (ushort)Typp[n];}
- virtual int GetIntValue(int n) {return (int)Typp[n];}
- virtual uint GetUIntValue(int n) {return (uint)Typp[n];}
- virtual longlong GetBigintValue(int n) {return (longlong)Typp[n];}
- virtual ulonglong GetUBigintValue(int n) {return (ulonglong)Typp[n];}
- virtual double GetFloatValue(int n) {return (double)Typp[n];}
+
+ virtual char GetTinyValue(int n) {return (char)UnalignedRead(n);}
+ virtual uchar GetUTinyValue(int n) {return (uchar)UnalignedRead(n);}
+ virtual short GetShortValue(int n) {return (short)UnalignedRead(n);}
+ virtual ushort GetUShortValue(int n) {return (ushort)UnalignedRead(n);}
+ virtual int GetIntValue(int n) {return (int)UnalignedRead(n);}
+ virtual uint GetUIntValue(int n) {return (uint)UnalignedRead(n);}
+ virtual longlong GetBigintValue(int n) {return (longlong)UnalignedRead(n);}
+ virtual ulonglong GetUBigintValue(int n) {return (ulonglong)UnalignedRead(n);}
+ virtual double GetFloatValue(int n) {return (double)UnalignedRead(n);}
virtual char *GetCharString(char *p, int n);
- virtual void Reset(int n) {Typp[n] = 0;}
+ virtual void Reset(int n) {UnalignedWrite(n, 0);}
// Methods
using VALBLK::SetValue;
virtual void SetValue(PCSZ sp, int n);
virtual void SetValue(const char *sp, uint len, int n);
virtual void SetValue(short sval, int n)
- {Typp[n] = (TYPE)sval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)sval); SetNull(n, false);}
virtual void SetValue(ushort sval, int n)
- {Typp[n] = (TYPE)sval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)sval); SetNull(n, false);}
virtual void SetValue(int lval, int n)
- {Typp[n] = (TYPE)lval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)lval); SetNull(n, false);}
virtual void SetValue(uint lval, int n)
- {Typp[n] = (TYPE)lval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)lval); SetNull(n, false);}
virtual void SetValue(longlong lval, int n)
- {Typp[n] = (TYPE)lval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)lval); SetNull(n, false);}
virtual void SetValue(ulonglong lval, int n)
- {Typp[n] = (TYPE)lval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)lval); SetNull(n, false);}
virtual void SetValue(double fval, int n)
- {Typp[n] = (TYPE)fval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)fval); SetNull(n, false);}
virtual void SetValue(char cval, int n)
- {Typp[n] = (TYPE)cval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)cval); SetNull(n, false);}
virtual void SetValue(uchar cval, int n)
- {Typp[n] = (TYPE)cval; SetNull(n, false);}
+ {UnalignedWrite(n, (TYPE)cval); SetNull(n, false);}
virtual void SetValue(PVAL valp, int n);
virtual void SetValue(PVBLK pv, int n1, int n2);
virtual void SetMin(PVAL valp, int n);
@@ -206,6 +208,17 @@ class TYPBLK : public VALBLK {
// Members
TYPE* const &Typp;
const char *Fmt;
+
+ // Unaligned access
+ TYPE UnalignedRead(int n) const {
+ TYPE result;
+ memcpy(&result, Typp + n, sizeof(TYPE));
+ return result;
+ }
+
+ void UnalignedWrite(int n, TYPE value) {
+ memcpy(Typp + n, &value, sizeof(TYPE));
+ }
}; // end of class TYPBLK
/***********************************************************************/