DBD-SQLite-Amalgamation
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sqlite-amalgamation.c view on Meta::CPAN
}
/*
** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
** builds) or a function call (for debugging). If it is a function call,
** it allows the operator to set a breakpoint at the spot where database
** corruption is first detected.
*/
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE int sqlite3Corrupt(void);
# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
#else
# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
#endif
/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char *, const char *);
SQLITE_PRIVATE int sqlite3StrNICmp(const char *, const char *, int);
SQLITE_PRIVATE int sqlite3IsNumber(const char*, int*, u8);
SQLITE_PRIVATE int sqlite3Strlen(sqlite3*, const char*);
SQLITE_PRIVATE int sqlite3MallocInit(void);
SQLITE_PRIVATE void sqlite3MallocEnd(void);
SQLITE_PRIVATE void *sqlite3Malloc(int);
SQLITE_PRIVATE void *sqlite3MallocZero(int);
SQLITE_PRIVATE void *sqlite3DbMallocZero(sqlite3*, int);
SQLITE_PRIVATE void *sqlite3DbMallocRaw(sqlite3*, int);
SQLITE_PRIVATE char *sqlite3DbStrDup(sqlite3*,const char*);
SQLITE_PRIVATE char *sqlite3DbStrNDup(sqlite3*,const char*, int);
SQLITE_PRIVATE void *sqlite3Realloc(void*, int);
SQLITE_PRIVATE void *sqlite3DbReallocOrFree(sqlite3 *, void *, int);
SQLITE_PRIVATE void *sqlite3DbRealloc(sqlite3 *, void *, int);
SQLITE_PRIVATE void sqlite3DbFree(sqlite3*, void*);
SQLITE_PRIVATE int sqlite3MallocSize(void*);
SQLITE_PRIVATE int sqlite3DbMallocSize(sqlite3*, void*);
SQLITE_PRIVATE void *sqlite3ScratchMalloc(int);
SQLITE_PRIVATE void sqlite3ScratchFree(void*);
SQLITE_PRIVATE void *sqlite3PageMalloc(int);
SQLITE_PRIVATE void sqlite3PageFree(void*);
SQLITE_PRIVATE void sqlite3MemSetDefault(void);
SQLITE_PRIVATE const sqlite3_mem_methods *sqlite3MemGetDefault(void);
SQLITE_PRIVATE const sqlite3_mem_methods *sqlite3MemGetMemsys5(void);
SQLITE_PRIVATE const sqlite3_mem_methods *sqlite3MemGetMemsys3(void);
SQLITE_PRIVATE const sqlite3_mem_methods *sqlite3MemGetMemsys6(void);
SQLITE_PRIVATE void sqlite3BenignMallocHooks(void (*)(void), void (*)(void));
#ifndef SQLITE_MUTEX_NOOP
SQLITE_PRIVATE sqlite3_mutex_methods *sqlite3DefaultMutex(void);
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*);
#endif
SQLITE_PRIVATE void sqlite3SetString(char **, sqlite3*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorClear(Parse*);
SQLITE_PRIVATE void sqlite3Dequote(char*);
SQLITE_PRIVATE void sqlite3DequoteExpr(sqlite3*, Expr*);
SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char*, int);
SQLITE_PRIVATE int sqlite3RunParser(Parse*, const char*, char **);
SQLITE_PRIVATE void sqlite3FinishCoding(Parse*);
SQLITE_PRIVATE int sqlite3GetTempReg(Parse*);
SQLITE_PRIVATE void sqlite3ReleaseTempReg(Parse*,int);
SQLITE_PRIVATE int sqlite3GetTempRange(Parse*,int);
SQLITE_PRIVATE void sqlite3ReleaseTempRange(Parse*,int,int);
SQLITE_PRIVATE Expr *sqlite3Expr(sqlite3*, int, Expr*, Expr*, const Token*);
SQLITE_PRIVATE Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*, const Token*);
SQLITE_PRIVATE Expr *sqlite3RegisterExpr(Parse*,Token*);
SQLITE_PRIVATE Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*);
SQLITE_PRIVATE void sqlite3ExprSpan(Expr*,Token*,Token*);
SQLITE_PRIVATE Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*);
SQLITE_PRIVATE void sqlite3ExprAssignVarNumber(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3ExprDelete(sqlite3*, Expr*);
SQLITE_PRIVATE ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*,Token*);
SQLITE_PRIVATE void sqlite3ExprListDelete(sqlite3*, ExprList*);
SQLITE_PRIVATE int sqlite3Init(sqlite3*, char**);
SQLITE_PRIVATE int sqlite3InitCallback(void*, int, char**, char**);
SQLITE_PRIVATE void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
SQLITE_PRIVATE void sqlite3ResetInternalSchema(sqlite3*, int);
SQLITE_PRIVATE void sqlite3BeginParse(Parse*,int);
SQLITE_PRIVATE void sqlite3CommitInternalChanges(sqlite3*);
SQLITE_PRIVATE Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
SQLITE_PRIVATE void sqlite3OpenMasterTable(Parse *, int);
SQLITE_PRIVATE void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
SQLITE_PRIVATE void sqlite3AddColumn(Parse*,Token*);
SQLITE_PRIVATE void sqlite3AddNotNull(Parse*, int);
SQLITE_PRIVATE void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
SQLITE_PRIVATE void sqlite3AddCheckConstraint(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3AddColumnType(Parse*,Token*);
SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,Expr*);
SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, Token*);
SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,Select*);
SQLITE_PRIVATE Bitvec *sqlite3BitvecCreate(u32);
SQLITE_PRIVATE int sqlite3BitvecTest(Bitvec*, u32);
SQLITE_PRIVATE int sqlite3BitvecSet(Bitvec*, u32);
SQLITE_PRIVATE void sqlite3BitvecClear(Bitvec*, u32);
SQLITE_PRIVATE void sqlite3BitvecDestroy(Bitvec*);
SQLITE_PRIVATE int sqlite3BitvecBuiltinTest(int,int*);
SQLITE_PRIVATE void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);
sqlite-amalgamation.c view on Meta::CPAN
bufpt = &buf[etBUFSIZE-1];
if( xtype==etORDINAL ){
static const char zOrd[] = "thstndrd";
int x = longvalue % 10;
if( x>=4 || (longvalue/10)%10==1 ){
x = 0;
}
buf[etBUFSIZE-3] = zOrd[x*2];
buf[etBUFSIZE-2] = zOrd[x*2+1];
bufpt -= 2;
}
{
register const char *cset; /* Use registers for speed */
register int base;
cset = &aDigits[infop->charset];
base = infop->base;
do{ /* Convert to ascii */
*(--bufpt) = cset[longvalue%base];
longvalue = longvalue/base;
}while( longvalue>0 );
}
length = &buf[etBUFSIZE-1]-bufpt;
for(idx=precision-length; idx>0; idx--){
*(--bufpt) = '0'; /* Zero pad */
}
if( prefix ) *(--bufpt) = prefix; /* Add sign */
if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
const char *pre;
char x;
pre = &aPrefix[infop->prefix];
for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
}
length = &buf[etBUFSIZE-1]-bufpt;
break;
case etFLOAT:
case etEXP:
case etGENERIC:
realvalue = va_arg(ap,double);
#ifndef SQLITE_OMIT_FLOATING_POINT
if( precision<0 ) precision = 6; /* Set default precision */
if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
if( realvalue<0.0 ){
realvalue = -realvalue;
prefix = '-';
}else{
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
if( xtype==etGENERIC && precision>0 ) precision--;
#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 ){
if( prefix=='-' ){
bufpt = "-Inf";
}else if( prefix=='+' ){
bufpt = "+Inf";
}else{
bufpt = "Inf";
}
length = strlen(bufpt);
break;
}
}
bufpt = buf;
/*
** If the field type is etGENERIC, then convert to either etEXP
** or etFLOAT, as appropriate.
*/
flag_exp = xtype==etEXP;
if( xtype!=etFLOAT ){
realvalue += rounder;
if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
}
if( xtype==etGENERIC ){
flag_rtz = !flag_alternateform;
if( exp<-4 || exp>precision ){
xtype = etEXP;
}else{
precision = precision - exp;
xtype = etFLOAT;
}
}else{
flag_rtz = 0;
}
if( xtype==etEXP ){
e2 = 0;
}else{
e2 = exp;
}
nsd = 0;
flag_dp = (precision>0) | flag_alternateform | flag_altform2;
/* The sign in front of the number */
if( prefix ){
*(bufpt++) = prefix;
}
/* Digits prior to the decimal point */
if( e2<0 ){
*(bufpt++) = '0';
}else{
for(; e2>=0; e2--){
*(bufpt++) = et_getdigit(&realvalue,&nsd);
}
sqlite-amalgamation.c view on Meta::CPAN
n = z-zBuf;
z[0] = 0;
zTerm = z;
z = zBuf;
c = sqlite3Utf8Read(z, zTerm, (const u8**)&z);
t = i;
if( i>=0xD800 && i<=0xDFFF ) t = 0xFFFD;
if( (i&0xFFFFFFFE)==0xFFFE ) t = 0xFFFD;
assert( c==t );
assert( (z-zBuf)==n );
}
for(i=0; i<0x00110000; i++){
if( i>=0xD800 && i<0xE000 ) continue;
z = zBuf;
WRITE_UTF16LE(z, i);
n = z-zBuf;
z[0] = 0;
z = zBuf;
READ_UTF16LE(z, c);
assert( c==i );
assert( (z-zBuf)==n );
}
for(i=0; i<0x00110000; i++){
if( i>=0xD800 && i<0xE000 ) continue;
z = zBuf;
WRITE_UTF16BE(z, i);
n = z-zBuf;
z[0] = 0;
z = zBuf;
READ_UTF16BE(z, c);
assert( c==i );
assert( (z-zBuf)==n );
}
}
#endif /* SQLITE_TEST */
#endif /* SQLITE_OMIT_UTF16 */
/************** End of utf.c *************************************************/
/************** Begin file util.c ********************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** 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;
}
/*
** Return the length of a string, except do not allow the string length
** to exceed the SQLITE_LIMIT_LENGTH setting.
*/
SQLITE_PRIVATE int sqlite3Strlen(sqlite3 *db, const char *z){
const char *z2 = z;
int len;
size_t x;
while( *z2 ){ z2++; }
x = z2 - z;
len = 0x7fffffff & x;
if( len!=x || len > db->aLimit[SQLITE_LIMIT_LENGTH] ){
return db->aLimit[SQLITE_LIMIT_LENGTH];
}else{
return len;
}
}
/*
** Set the most recent error code and error string for the sqlite
** handle "db". The error code is set to "err_code".
**
** If it is not NULL, string zFormat specifies the format of the
** error string in the style of the printf functions: The following
** format characters are allowed:
**
** %s Insert a string
** %z A string that should be freed after use
** %d Insert an integer
** %T Insert a token
** %S Insert the first element of a SrcList
**
** zFormat and any string tokens that follow it are assumed to be
** encoded in UTF-8.
**
** To clear the most recent error for sqlite handle "db", sqlite3Error
** should be called with err_code set to SQLITE_OK and zFormat set
** to NULL.
*/
SQLITE_PRIVATE void sqlite3Error(sqlite3 *db, int err_code, const char *zFormat, ...){
if( db && (db->pErr || (db->pErr = sqlite3ValueNew(db))!=0) ){
db->errCode = err_code;
if( zFormat ){
char *z;
va_list ap;
va_start(ap, zFormat);
z = sqlite3VMPrintf(db, zFormat, ap);
va_end(ap);
sqlite3ValueSetStr(db->pErr, -1, z, SQLITE_UTF8, SQLITE_DYNAMIC);
}else{
sqlite-amalgamation.c view on Meta::CPAN
** Convert pMem so that it has types MEM_Real or MEM_Int or both.
** Invalidate any prior representations.
*/
SQLITE_PRIVATE int sqlite3VdbeMemNumerify(Mem *pMem){
double r1, r2;
i64 i;
assert( (pMem->flags & (MEM_Int|MEM_Real|MEM_Null))==0 );
assert( (pMem->flags & (MEM_Blob|MEM_Str))!=0 );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
r1 = sqlite3VdbeRealValue(pMem);
i = doubleToInt64(r1);
r2 = (double)i;
if( r1==r2 ){
sqlite3VdbeMemIntegerify(pMem);
}else{
pMem->r = r1;
setTypeFlag(pMem, MEM_Real);
}
return SQLITE_OK;
}
/*
** Delete any previous value and set the value stored in *pMem to NULL.
*/
SQLITE_PRIVATE void sqlite3VdbeMemSetNull(Mem *pMem){
setTypeFlag(pMem, MEM_Null);
pMem->type = SQLITE_NULL;
}
/*
** Delete any previous value and set the value to be a BLOB of length
** n containing all zeros.
*/
SQLITE_PRIVATE void sqlite3VdbeMemSetZeroBlob(Mem *pMem, int n){
sqlite3VdbeMemRelease(pMem);
setTypeFlag(pMem, MEM_Blob);
pMem->flags = MEM_Blob|MEM_Zero;
pMem->type = SQLITE_BLOB;
pMem->n = 0;
if( n<0 ) n = 0;
pMem->u.i = n;
pMem->enc = SQLITE_UTF8;
}
/*
** Delete any previous value and set the value stored in *pMem to val,
** manifest type INTEGER.
*/
SQLITE_PRIVATE void sqlite3VdbeMemSetInt64(Mem *pMem, i64 val){
sqlite3VdbeMemRelease(pMem);
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;
}
}
/*
** Return true if the Mem object contains a TEXT or BLOB that is
** too large - whose size exceeds SQLITE_MAX_LENGTH.
*/
SQLITE_PRIVATE int sqlite3VdbeMemTooBig(Mem *p){
assert( p->db!=0 );
if( p->flags & (MEM_Str|MEM_Blob) ){
int n = p->n;
if( p->flags & MEM_Zero ){
n += p->u.i;
}
return n>p->db->aLimit[SQLITE_LIMIT_LENGTH];
}
return 0;
}
/*
** Size of struct Mem not including the Mem.zMalloc member.
*/
#define MEMCELLSIZE (size_t)(&(((Mem *)0)->zMalloc))
/*
** Make an shallow copy of pFrom into pTo. Prior contents of
** pTo are freed. The pFrom->z field is not duplicated. If
** pFrom->z is used, then pTo->z points to the same thing as pFrom->z
** and flags gets srcType (either MEM_Ephem or MEM_Static).
*/
SQLITE_PRIVATE void sqlite3VdbeMemShallowCopy(Mem *pTo, const Mem *pFrom, int srcType){
sqlite3VdbeMemReleaseExternal(pTo);
memcpy(pTo, pFrom, MEMCELLSIZE);
pTo->xDel = 0;
if( (pFrom->flags&MEM_Dyn)!=0 || pFrom->z==pFrom->zMalloc ){
pTo->flags &= ~(MEM_Dyn|MEM_Static|MEM_Ephem);
assert( srcType==MEM_Ephem || srcType==MEM_Static );
pTo->flags |= srcType;
}
}
/*
** Make a full copy of pFrom into pTo. Prior contents of pTo are
** freed before the copy is made.
*/
SQLITE_PRIVATE int sqlite3VdbeMemCopy(Mem *pTo, const Mem *pFrom){
int rc = SQLITE_OK;
sqlite3VdbeMemReleaseExternal(pTo);
memcpy(pTo, pFrom, MEMCELLSIZE);
pTo->flags &= ~MEM_Dyn;
if( pTo->flags&(MEM_Str|MEM_Blob) ){
if( 0==(pFrom->flags&MEM_Static) ){
sqlite-amalgamation.c view on Meta::CPAN
case 11: /* Reserved for future use */
case 0: { /* NULL */
pMem->flags = MEM_Null;
break;
}
case 1: { /* 1-byte signed integer */
pMem->u.i = (signed char)buf[0];
pMem->flags = MEM_Int;
return 1;
}
case 2: { /* 2-byte signed integer */
pMem->u.i = (((signed char)buf[0])<<8) | buf[1];
pMem->flags = MEM_Int;
return 2;
}
case 3: { /* 3-byte signed integer */
pMem->u.i = (((signed char)buf[0])<<16) | (buf[1]<<8) | buf[2];
pMem->flags = MEM_Int;
return 3;
}
case 4: { /* 4-byte signed integer */
pMem->u.i = (buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
pMem->flags = MEM_Int;
return 4;
}
case 5: { /* 6-byte signed integer */
u64 x = (((signed char)buf[0])<<8) | buf[1];
u32 y = (buf[2]<<24) | (buf[3]<<16) | (buf[4]<<8) | buf[5];
x = (x<<32) | y;
pMem->u.i = *(i64*)&x;
pMem->flags = MEM_Int;
return 6;
}
case 6: /* 8-byte signed integer */
case 7: { /* IEEE floating point */
u64 x;
u32 y;
#if !defined(NDEBUG) && !defined(SQLITE_OMIT_FLOATING_POINT)
/* Verify that integers and floating point values use the same
** byte order. Or, that if SQLITE_MIXED_ENDIAN_64BIT_FLOAT is
** defined that 64-bit floating point values really are mixed
** endian.
*/
static const u64 t1 = ((u64)0x3ff00000)<<32;
static const double r1 = 1.0;
u64 t2 = t1;
swapMixedEndianFloat(t2);
assert( sizeof(r1)==sizeof(t2) && memcmp(&r1, &t2, sizeof(r1))==0 );
#endif
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: {
int len = (serial_type-12)/2;
pMem->z = (char *)buf;
pMem->n = len;
pMem->xDel = 0;
if( serial_type&0x01 ){
pMem->flags = MEM_Str | MEM_Ephem;
}else{
pMem->flags = MEM_Blob | MEM_Ephem;
}
return len;
}
}
return 0;
}
/*
** Given the nKey-byte encoding of a record in pKey[], parse the
** record into a UnpackedRecord structure. Return a pointer to
** that structure.
**
** The calling function might provide szSpace bytes of memory
** space at pSpace. This space can be used to hold the returned
** VDbeParsedRecord structure if it is large enough. If it is
** not big enough, space is obtained from sqlite3_malloc().
**
** The returned structure should be closed by a call to
** sqlite3VdbeDeleteUnpackedRecord().
*/
SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(
KeyInfo *pKeyInfo, /* Information about the record format */
int nKey, /* Size of the binary record */
const void *pKey, /* The binary record */
void *pSpace, /* Space available to hold resulting object */
int szSpace /* Size of pSpace[] in bytes */
){
const unsigned char *aKey = (const unsigned char *)pKey;
UnpackedRecord *p;
int nByte;
int idx, d;
u16 u; /* Unsigned loop counter */
u32 szHdr;
Mem *pMem;
assert( sizeof(Mem)>sizeof(*p) );
nByte = sizeof(Mem)*(pKeyInfo->nField+2);
if( nByte>szSpace ){
p = sqlite3DbMallocRaw(pKeyInfo->db, nByte);
if( p==0 ) return 0;
p->needFree = 1;
sqlite-amalgamation.c view on Meta::CPAN
** P1 is the result code returned by sqlite3_exec(), sqlite3_reset(),
** or sqlite3_finalize(). For a normal halt, this should be SQLITE_OK (0).
** For errors, it can be some other value. If P1!=0 then P2 will determine
** whether or not to rollback the current transaction. Do not rollback
** if P2==OE_Fail. Do the rollback if P2==OE_Rollback. If P2==OE_Abort,
** then back out all changes that have occurred during this execution of the
** VDBE, but do not rollback the transaction.
**
** If P4 is not null then it is an error message string.
**
** There is an implied "Halt 0 0 0" instruction inserted at the very end of
** every program. So a jump past the last instruction of the program
** is the same as executing Halt.
*/
case OP_Halt: {
p->rc = pOp->p1;
p->pc = pc;
p->errorAction = pOp->p2;
if( pOp->p4.z ){
sqlite3SetString(&p->zErrMsg, db, "%s", pOp->p4.z);
}
rc = sqlite3VdbeHalt(p);
assert( rc==SQLITE_BUSY || rc==SQLITE_OK );
if( rc==SQLITE_BUSY ){
p->rc = rc = SQLITE_BUSY;
}else{
rc = p->rc ? SQLITE_ERROR : SQLITE_DONE;
}
goto vdbe_return;
}
/* Opcode: Integer P1 P2 * * *
**
** The 32-bit integer value P1 is written into register P2.
*/
case OP_Integer: { /* out2-prerelease */
pOut->flags = MEM_Int;
pOut->u.i = pOp->p1;
break;
}
/* Opcode: Int64 * P2 * P4 *
**
** P4 is a pointer to a 64-bit integer value.
** Write that value into register P2.
*/
case OP_Int64: { /* out2-prerelease */
assert( pOp->p4.pI64!=0 );
pOut->flags = MEM_Int;
pOut->u.i = *pOp->p4.pI64;
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 */
assert( pOp->p4.z!=0 );
pOp->opcode = OP_String;
pOp->p1 = strlen(pOp->p4.z);
#ifndef SQLITE_OMIT_UTF16
if( encoding!=SQLITE_UTF8 ){
sqlite3VdbeMemSetStr(pOut, pOp->p4.z, -1, SQLITE_UTF8, SQLITE_STATIC);
if( SQLITE_OK!=sqlite3VdbeChangeEncoding(pOut, encoding) ) goto no_mem;
if( SQLITE_OK!=sqlite3VdbeMemMakeWriteable(pOut) ) goto no_mem;
pOut->zMalloc = 0;
pOut->flags |= MEM_Static;
pOut->flags &= ~MEM_Dyn;
if( pOp->p4type==P4_DYNAMIC ){
sqlite3DbFree(db, pOp->p4.z);
}
pOp->p4type = P4_DYNAMIC;
pOp->p4.z = pOut->z;
pOp->p1 = pOut->n;
if( pOp->p1>db->aLimit[SQLITE_LIMIT_LENGTH] ){
goto too_big;
}
UPDATE_MAX_BLOBSIZE(pOut);
break;
}
#endif
if( pOp->p1>db->aLimit[SQLITE_LIMIT_LENGTH] ){
goto too_big;
}
/* Fall through to the next case, OP_String */
}
/* Opcode: String P1 P2 * P4 *
**
** The string value P4 of length P1 (bytes) is stored in register P2.
*/
case OP_String: { /* out2-prerelease */
assert( pOp->p4.z!=0 );
pOut->flags = MEM_Str|MEM_Static|MEM_Term;
pOut->z = pOp->p4.z;
pOut->n = pOp->p1;
pOut->enc = encoding;
UPDATE_MAX_BLOBSIZE(pOut);
break;
}
/* Opcode: Null * P2 * * *
**
** Write a NULL into register P2.
*/
case OP_Null: { /* out2-prerelease */
sqlite-amalgamation.c view on Meta::CPAN
case OP_Multiply: /* same as TK_STAR, in1, in2, out3 */
case OP_Divide: /* same as TK_SLASH, in1, in2, out3 */
case OP_Remainder: { /* same as TK_REM, in1, in2, out3 */
int flags;
applyNumericAffinity(pIn1);
applyNumericAffinity(pIn2);
flags = pIn1->flags | pIn2->flags;
if( (flags & MEM_Null)!=0 ) goto arithmetic_result_is_null;
if( (pIn1->flags & pIn2->flags & MEM_Int)==MEM_Int ){
i64 a, b;
a = pIn1->u.i;
b = pIn2->u.i;
switch( pOp->opcode ){
case OP_Add: b += a; break;
case OP_Subtract: b -= a; break;
case OP_Multiply: b *= a; break;
case OP_Divide: {
if( a==0 ) goto arithmetic_result_is_null;
/* Dividing the largest possible negative 64-bit integer (1<<63) by
** -1 returns an integer too large to store in a 64-bit data-type. On
** some architectures, the value overflows to (1<<63). On others,
** a SIGFPE is issued. The following statement normalizes this
** behavior so that all architectures behave as if integer
** overflow occurred.
*/
if( a==-1 && b==SMALLEST_INT64 ) a = 1;
b /= a;
break;
}
default: {
if( a==0 ) goto arithmetic_result_is_null;
if( a==-1 ) a = 1;
b %= a;
break;
}
}
pOut->u.i = b;
MemSetTypeFlag(pOut, MEM_Int);
}else{
double a, b;
a = sqlite3VdbeRealValue(pIn1);
b = sqlite3VdbeRealValue(pIn2);
switch( pOp->opcode ){
case OP_Add: b += a; break;
case OP_Subtract: b -= a; break;
case OP_Multiply: b *= a; break;
case OP_Divide: {
if( a==0.0 ) goto arithmetic_result_is_null;
b /= a;
break;
}
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;
arithmetic_result_is_null:
sqlite3VdbeMemSetNull(pOut);
break;
}
/* Opcode: CollSeq * * P4
**
** P4 is a pointer to a CollSeq struct. If the next call to a user function
** or aggregate calls sqlite3GetFuncCollSeq(), this collation sequence will
** be returned. This is used by the built-in min(), max() and nullif()
** functions.
**
** The interface used by the implementation of the aforementioned functions
** to retrieve the collation sequence set by this opcode is not available
** publicly, only to user functions defined in func.c.
*/
case OP_CollSeq: {
assert( pOp->p4type==P4_COLLSEQ );
break;
}
/* Opcode: Function P1 P2 P3 P4 P5
**
** Invoke a user function (P4 is a pointer to a Function structure that
** defines the function) with P5 arguments taken from register P2 and
** successors. The result of the function is stored in register P3.
** Register P3 must not be one of the function inputs.
**
** P1 is a 32-bit bitmask indicating whether or not each argument to the
** function was determined to be constant at compile time. If the first
** argument was constant then bit 0 of P1 is set. This is used to determine
** whether meta data associated with a user function argument using the
** sqlite3_set_auxdata() API may be safely retained until the next
** invocation of this opcode.
**
** See also: AggStep and AggFinal
*/
case OP_Function: {
int i;
Mem *pArg;
sqlite3_context ctx;
sqlite3_value **apVal;
int n = pOp->p5;
apVal = p->apArg;
assert( apVal || n==0 );
assert( n==0 || (pOp->p2>0 && pOp->p2+n<=p->nMem) );
assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+n );
pArg = &p->aMem[pOp->p2];
sqlite-amalgamation.c view on Meta::CPAN
*/
static const Token one = { (u8*)"1", 0, 1 };
Select *pSel;
SelectDest dest;
pSel = pExpr->pSelect;
sqlite3SelectDestInit(&dest, 0, ++pParse->nMem);
if( pExpr->op==TK_SELECT ){
dest.eDest = SRT_Mem;
sqlite3VdbeAddOp2(v, OP_Null, 0, dest.iParm);
VdbeComment((v, "Init subquery result"));
}else{
dest.eDest = SRT_Exists;
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iParm);
VdbeComment((v, "Init EXISTS result"));
}
sqlite3ExprDelete(pParse->db, pSel->pLimit);
pSel->pLimit = sqlite3PExpr(pParse, TK_INTEGER, 0, 0, &one);
if( sqlite3Select(pParse, pSel, &dest, 0, 0, 0) ){
return;
}
pExpr->iColumn = dest.iParm;
break;
}
}
if( testAddr ){
sqlite3VdbeJumpHere(v, testAddr-1);
}
return;
}
#endif /* SQLITE_OMIT_SUBQUERY */
/*
** Duplicate an 8-byte value
*/
static char *dup8bytes(Vdbe *v, const char *in){
char *out = sqlite3DbMallocRaw(sqlite3VdbeDb(v), 8);
if( out ){
memcpy(out, in, 8);
}
return out;
}
/*
** Generate an instruction that will put the floating point
** value described by z[0..n-1] into register iMem.
**
** The z[] string will probably not be zero-terminated. But the
** 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);
}
}
}
/*
** Generate an instruction that will put the integer describe by
** text z[0..n-1] into register iMem.
**
** The z[] string will probably not be zero-terminated. But the
** z[n] character is guaranteed to be something that does not look
** like the continuation of the number.
*/
static void codeInteger(Vdbe *v, Expr *pExpr, int negFlag, int iMem){
const char *z;
if( pExpr->flags & EP_IntValue ){
int i = pExpr->iTable;
if( negFlag ) i = -i;
sqlite3VdbeAddOp2(v, OP_Integer, i, iMem);
}else if( (z = (char*)pExpr->token.z)!=0 ){
int i;
int n = pExpr->token.n;
assert( !isdigit(z[n]) );
if( sqlite3GetInt32(z, &i) ){
if( negFlag ) i = -i;
sqlite3VdbeAddOp2(v, OP_Integer, i, iMem);
}else if( sqlite3FitsIn64Bits(z, negFlag) ){
i64 value;
char *zV;
sqlite3Atoi64(z, &value);
if( negFlag ) value = -value;
zV = dup8bytes(v, (char*)&value);
sqlite3VdbeAddOp4(v, OP_Int64, 0, iMem, 0, zV, P4_INT64);
}else{
codeReal(v, z, n, negFlag, iMem);
}
}
}
/*
** Generate code that will extract the iColumn-th column from
** table pTab and store the column value in a register. An effort
** is made to store the column value in register iReg, but this is
** not guaranteed. The location of the column value is returned.
**
** There must be an open cursor to pTab in iTable when this routine
** is called. If iColumn<0 then code is generated that extracts the rowid.
**
** This routine might attempt to reuse the value of the column that
** has already been loaded into a register. The value will always
** be used if it has not undergone any affinity changes. But if
** an affinity change has occurred, then the cached value will only be
** used if allowAffChng is true.
*/
sqlite-amalgamation.c view on Meta::CPAN
** SQLite. But as long as you do not compile with SQLITE_OMIT_AUTOINIT
** this routine will be called automatically by key routines such as
** sqlite3_open().
**
** This routine is a no-op except on its very first call for the process,
** or for the first call after a call to sqlite3_shutdown.
*/
SQLITE_API int sqlite3_initialize(void){
static int inProgress = 0;
int rc;
/* If SQLite is already initialized, this call is a no-op. */
if( sqlite3Config.isInit ) return SQLITE_OK;
/* Make sure the mutex system is initialized. */
rc = sqlite3MutexInit();
if( rc==SQLITE_OK ){
/* Initialize the malloc() system and the recursive pInitMutex mutex.
** This operation is protected by the STATIC_MASTER mutex.
*/
sqlite3_mutex *pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
sqlite3_mutex_enter(pMaster);
if( !sqlite3Config.isMallocInit ){
rc = sqlite3MallocInit();
}
if( rc==SQLITE_OK ){
sqlite3Config.isMallocInit = 1;
if( !sqlite3Config.pInitMutex ){
sqlite3Config.pInitMutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE);
if( sqlite3Config.bCoreMutex && !sqlite3Config.pInitMutex ){
rc = SQLITE_NOMEM;
}
}
}
sqlite3_mutex_leave(pMaster);
if( rc!=SQLITE_OK ){
return rc;
}
/* Enter the recursive pInitMutex mutex. After doing so, if the
** sqlite3Config.isInit flag is true, then some other thread has
** finished doing the initialization. If the inProgress flag is
** true, then this function is being called recursively from within
** the sqlite3_os_init() call below. In either case, exit early.
*/
sqlite3_mutex_enter(sqlite3Config.pInitMutex);
if( sqlite3Config.isInit || inProgress ){
sqlite3_mutex_leave(sqlite3Config.pInitMutex);
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
** routine is not threadsafe. Not by a long shot.
*/
SQLITE_API int sqlite3_shutdown(void){
sqlite3_mutex_free(sqlite3Config.pInitMutex);
sqlite3Config.pInitMutex = 0;
sqlite3Config.isMallocInit = 0;
if( sqlite3Config.isInit ){
sqlite3_os_end();
}
if( sqlite3Config.m.xShutdown ){
sqlite3MallocEnd();
}
if( sqlite3Config.mutex.xMutexEnd ){
sqlite3MutexEnd();
}
sqlite3Config.isInit = 0;
return SQLITE_OK;
}
/*
** This API allows applications to modify the global configuration of
** the SQLite library at run-time.
**
** This routine should only be called when there are no outstanding
** database connections or memory allocations. This routine is not
** threadsafe. Failure to heed these warnings can lead to unpredictable
** behavior.
*/
SQLITE_API int sqlite3_config(int op, ...){
va_list ap;
int rc = SQLITE_OK;
/* sqlite3_config() shall return SQLITE_MISUSE if it is invoked while
** the SQLite library is in use. */
if( sqlite3Config.isInit ) return SQLITE_MISUSE;
va_start(ap, op);
switch( op ){
case SQLITE_CONFIG_SINGLETHREAD: {
/* Disable all mutexing */
sqlite3Config.bCoreMutex = 0;
sqlite3Config.bFullMutex = 0;
break;
}
case SQLITE_CONFIG_MULTITHREAD: {
/* Disable mutexing of database connections */
/* Enable mutexing of core data structures */
sqlite3Config.bCoreMutex = 1;
sqlite3Config.bFullMutex = 0;
break;
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