DBD-SQLite-Amalgamation
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s++; if (s == send || (*s != 'F' && *s != 'f')) return 0;
s++; if (s < send && (*s == 'I' || *s == 'i')) {
s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
s++; if (s == send || (*s != 'I' && *s != 'i')) return 0;
s++; if (s == send || (*s != 'T' && *s != 't')) return 0;
s++; if (s == send || (*s != 'Y' && *s != 'y')) return 0;
s++;
}
sawinf = 1;
} else if (*s == 'N' || *s == 'n') {
/* XXX TODO: There are signaling NaNs and quiet NaNs. */
s++; if (s == send || (*s != 'A' && *s != 'a')) return 0;
s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
s++;
sawnan = 1;
} else
return 0;
if (sawinf) {
numtype &= IS_NUMBER_NEG; /* Keep track of sign */
numtype |= IS_NUMBER_INFINITY | IS_NUMBER_NOT_INT;
sqlite-amalgamation.c view on Meta::CPAN
SQLITE_PRIVATE sqlite3_mutex *sqlite3MutexAlloc(int);
SQLITE_PRIVATE int sqlite3MutexInit(void);
SQLITE_PRIVATE int sqlite3MutexEnd(void);
#endif
SQLITE_PRIVATE void sqlite3StatusReset(void);
SQLITE_PRIVATE int sqlite3StatusValue(int);
SQLITE_PRIVATE void sqlite3StatusAdd(int, int);
SQLITE_PRIVATE void sqlite3StatusSet(int, int);
SQLITE_PRIVATE int sqlite3IsNaN(double);
SQLITE_PRIVATE void sqlite3VXPrintf(StrAccum*, int, const char*, va_list);
SQLITE_PRIVATE char *sqlite3MPrintf(sqlite3*,const char*, ...);
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
SQLITE_PRIVATE char *sqlite3MAppendf(sqlite3*,char*,const char*,...);
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE void sqlite3DebugPrintf(const char*, ...);
#endif
#if defined(SQLITE_TEST)
SQLITE_PRIVATE void *sqlite3TestTextToPtr(const char*);
sqlite-amalgamation.c view on Meta::CPAN
#if 0
/* Rounding works like BSD when the constant 0.4999 is used. Wierd! */
for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
#else
/* It makes more sense to use 0.5 */
for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
#endif
if( xtype==etFLOAT ) realvalue += rounder;
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
exp = 0;
if( sqlite3IsNaN(realvalue) ){
bufpt = "NaN";
length = 3;
break;
}
if( realvalue>0.0 ){
while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 ){ realvalue *= 10.0; exp--; }
if( exp>350 ){
sqlite-amalgamation.c view on Meta::CPAN
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.241 2008/07/28 19:34:54 drh Exp $
*/
/*
** Return true if the floating point value is Not a Number (NaN).
*/
SQLITE_PRIVATE int sqlite3IsNaN(double x){
/* This NaN test sometimes fails if compiled on GCC with -ffast-math.
** On the other hand, the use of -ffast-math comes with the following
** warning:
**
** This option [-ffast-math] should never be turned on by any
** -O option since it can result in incorrect output for programs
** which depend on an exact implementation of IEEE or ISO
** rules/specifications for math functions.
**
** Under MSVC, this NaN test may fail if compiled with a floating-
** point precision mode other than /fp:precise. From the MSDN
** documentation:
**
** The compiler [with /fp:precise] will properly handle comparisons
** involving NaN. For example, x != x evaluates to true if x is NaN
** ...
*/
#ifdef __FAST_MATH__
# error SQLite will not work correctly with the -ffast-math option of GCC.
#endif
volatile double y = x;
volatile double z = y;
return y!=z;
}
sqlite-amalgamation.c view on Meta::CPAN
pMem->u.i = val;
pMem->flags = MEM_Int;
pMem->type = SQLITE_INTEGER;
}
/*
** Delete any previous value and set the value stored in *pMem to val,
** manifest type REAL.
*/
SQLITE_PRIVATE void sqlite3VdbeMemSetDouble(Mem *pMem, double val){
if( sqlite3IsNaN(val) ){
sqlite3VdbeMemSetNull(pMem);
}else{
sqlite3VdbeMemRelease(pMem);
pMem->r = val;
pMem->flags = MEM_Real;
pMem->type = SQLITE_FLOAT;
}
}
/*
sqlite-amalgamation.c view on Meta::CPAN
x = (buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
y = (buf[4]<<24) | (buf[5]<<16) | (buf[6]<<8) | buf[7];
x = (x<<32) | y;
if( serial_type==6 ){
pMem->u.i = *(i64*)&x;
pMem->flags = MEM_Int;
}else{
assert( sizeof(x)==8 && sizeof(pMem->r)==8 );
swapMixedEndianFloat(x);
memcpy(&pMem->r, &x, sizeof(x));
pMem->flags = sqlite3IsNaN(pMem->r) ? MEM_Null : MEM_Real;
}
return 8;
}
case 8: /* Integer 0 */
case 9: { /* Integer 1 */
pMem->u.i = serial_type-8;
pMem->flags = MEM_Int;
return 0;
}
default: {
sqlite-amalgamation.c view on Meta::CPAN
break;
}
/* Opcode: Real * P2 * P4 *
**
** P4 is a pointer to a 64-bit floating point value.
** Write that value into register P2.
*/
case OP_Real: { /* same as TK_FLOAT, out2-prerelease */
pOut->flags = MEM_Real;
assert( !sqlite3IsNaN(*pOp->p4.pReal) );
pOut->r = *pOp->p4.pReal;
break;
}
/* Opcode: String8 * P2 * P4 *
**
** P4 points to a nul terminated UTF-8 string. This opcode is transformed
** into an OP_String before it is executed for the first time.
*/
case OP_String8: { /* same as TK_STRING, out2-prerelease */
sqlite-amalgamation.c view on Meta::CPAN
}
default: {
i64 ia = (i64)a;
i64 ib = (i64)b;
if( ia==0 ) goto arithmetic_result_is_null;
if( ia==-1 ) ia = 1;
b = ib % ia;
break;
}
}
if( sqlite3IsNaN(b) ){
goto arithmetic_result_is_null;
}
pOut->r = b;
MemSetTypeFlag(pOut, MEM_Real);
if( (flags & MEM_Real)==0 ){
sqlite3VdbeIntegerAffinity(pOut);
}
}
break;
sqlite-amalgamation.c view on Meta::CPAN
** z[n] character is guaranteed to be something that does not look
** like the continuation of the number.
*/
static void codeReal(Vdbe *v, const char *z, int n, int negateFlag, int iMem){
assert( z || v==0 || sqlite3VdbeDb(v)->mallocFailed );
if( z ){
double value;
char *zV;
assert( !isdigit(z[n]) );
sqlite3AtoF(z, &value);
if( sqlite3IsNaN(value) ){
sqlite3VdbeAddOp2(v, OP_Null, 0, iMem);
}else{
if( negateFlag ) value = -value;
zV = dup8bytes(v, (char*)&value);
sqlite3VdbeAddOp4(v, OP_Real, 0, iMem, 0, zV, P4_REAL);
}
}
}
sqlite-amalgamation.c view on Meta::CPAN
return SQLITE_OK;
}
sqlite3StatusReset();
inProgress = 1;
rc = sqlite3_os_init();
inProgress = 0;
sqlite3Config.isInit = (rc==SQLITE_OK ? 1 : 0);
sqlite3_mutex_leave(sqlite3Config.pInitMutex);
}
/* Check NaN support. */
#ifndef NDEBUG
/* This section of code's only "output" is via assert() statements. */
if ( rc==SQLITE_OK ){
u64 x = (((u64)1)<<63)-1;
double y;
assert(sizeof(x)==8);
assert(sizeof(x)==sizeof(y));
memcpy(&y, &x, 8);
assert( sqlite3IsNaN(y) );
}
#endif
return rc;
}
/*
** Undo the effects of sqlite3_initialize(). Must not be called while
** there are outstanding database connections or memory allocations or
** while any part of SQLite is otherwise in use in any thread. This
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