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Fix all known instances of signed-integer overflow. Within SQL expressions,

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integer overflow now forces coercion to floating point.  The shift operators
work with any integer right-hand operand with negative values reversing
the direction of the shift.

FossilOrigin-Name: abf21394124a0af46f072793718964cee2ce55d0
This commit is contained in:
drh
2011-03-05 20:59:46 +00:00
parent cfd654bf2a
commit 158b9cb965
10 changed files with 288 additions and 77 deletions
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2
src/expr.c
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@@ -1964,7 +1964,7 @@ static void codeInteger(Parse *pParse, Expr *pExpr, int negFlag, int iMem){
c = sqlite3Atoi64(z, &value, sqlite3Strlen30(z), SQLITE_UTF8);
if( c==0 || (c==2 && negFlag) ){
char *zV;
if( negFlag ){ value = -value; } /* CLANG */
if( negFlag ){ value = c==2 ? SMALLEST_INT64 : -value; }
zV = dup8bytes(v, (char*)&value);
sqlite3VdbeAddOp4(v, OP_Int64, 0, iMem, 0, zV, P4_INT64);
}else{