SQLite

  int nCursor;        /* Number of slots in apCsr[] */
  Cursor **apCsr;     /* One element of this array for each open cursor */
  Sorter *pSort;      /* A linked list of objects to be sorted */
  FILE *pFile;        /* At most one open file handler */
  int nField;         /* Number of file fields */
  char **azField;     /* Data for each file field */
  int nVar;           /* Number of entries in azVariable[] */
  Mem *azVar;         /* Values for the OP_Variable opcode. */


  char *zLine;            /* A single line from the input file */
  int nLineAlloc;         /* Number of spaces allocated for zLine */
  int magic;              /* Magic number for sanity checking */
  int nMem;               /* Number of memory locations currently allocated */
  Mem *aMem;              /* The memory locations */
  Agg agg;                /* Aggregate information */
  int nSet;               /* Number of sets allocated */

  */
  if( p->aStack==0 ){
    p->nVar = nVar;
    assert( nVar>=0 );
    n = isExplain ? 10 : p->nOp;
    p->aStack = sqliteMalloc(
      n*(sizeof(p->aStack[0]) + 2*sizeof(char*))     /* aStack and zArgv */
      + p->nVar*sizeof(Mem)                          /* azVar */
    );
    p->zArgv = (char**)&p->aStack[n];
    p->azColName = (char**)&p->zArgv[n];
    p->azVar = (Mem *)&p->azColName[n];
    for(n=0; n<p->nVar; n++){
      p->azVar[n].flags = MEM_Null;
    }
  }

  sqlite3HashInit(&p->agg.hash, SQLITE_HASH_BINARY, 0);
  p->agg.pSearch = 0;
#ifdef MEMORY_DEBUG
  if( sqlite3OsFileExists("vdbe_trace") ){
    p->trace = stdout;

    sqlite3_close(db);
  }
  if( rc==SQLITE_SCHEMA ){
    sqlite3ResetInternalSchema(db, 0);
  }
  return rc;
}

/*
** Unbind the value bound to variable $i in virtual machine p. This is the 
** the same as binding a NULL value to the column.
*/
static int vdbeUnbind(Vdbe *p, int i){
  Mem *pVar;
  if( p->magic!=VDBE_MAGIC_RUN || p->pc!=0 ){
    return SQLITE_MISUSE;
  }
  if( i<1 || i>p->nVar ){
    return SQLITE_RANGE;
  }
  i--;
  pVar = &p->azVar[i];
  if( pVar->flags&MEM_Dyn ){
    sqliteFree(pVar->z);
  }
  pVar->flags = MEM_Null;
  return SQLITE_OK;
}

/*
** This routine is used to bind text or blob data to an SQL variable (a ?).
** It may also be used to bind a NULL value, by setting zVal to 0.
*/
static int vdbeBindBlob(
  Vdbe *p,           /* Virtual machine */
  int i,             /* Var number to bind (numbered from 1 upward) */
  const char *zVal,  /* Pointer to blob of data */
  int bytes,         /* Number of bytes to copy */
  int copy,          /* True to copy the memory, false to copy a pointer */
  int flags          /* Valid combination of MEM_Blob, MEM_Str, MEM_UtfXX */
){
  Mem *pVar;

  vdbeUnbind(p, i);
  pVar = &p->azVar[i-1];

  if( zVal ){
    pVar->n = bytes;
    pVar->flags = flags;
    if( !copy ){
      pVar->z = (char *)zVal;
      pVar->flags |= MEM_Static;
    }else{
      if( bytes>NBFS ){
        pVar->z = (char *)sqliteMalloc(bytes);
        if( !pVar->z ){
          return SQLITE_NOMEM;
        }
        pVar->flags |= MEM_Dyn;
      }else{
        pVar->z = pVar->zShort;
        pVar->flags |= MEM_Short;
      }
      memcpy(pVar->z, zVal, bytes);
    }
  }

  return SQLITE_OK;
}

int sqlite3_bind_int64(sqlite3_stmt *p, int i, long long int iValue){
  int rc;
  Vdbe *v = (Vdbe *)p;
  rc = vdbeUnbind(v, i);
  if( rc==SQLITE_OK ){
    Mem *pVar = &v->azVar[i-1];
    pVar->flags = MEM_Int;
    pVar->i = iValue;
  }
  return SQLITE_OK;
}

int sqlite3_bind_int32(sqlite3_stmt *p, int i, int iValue){
  return sqlite3_bind_int64(p, i, (long long int)iValue);
}

int sqlite3_bind_double(sqlite3_stmt *p, int i, double iValue){
  int rc;
  Vdbe *v = (Vdbe *)p;
  rc = vdbeUnbind(v, i);
  if( rc==SQLITE_OK ){
    Mem *pVar = &v->azVar[i-1];
    pVar->flags = MEM_Real;
    pVar->r = iValue;
  }
  return SQLITE_OK;
}

int sqlite3_bind_null(sqlite3_stmt* p, int i){
  return vdbeUnbind((Vdbe *)p, i);
}

int sqlite3_bind_text( 
  sqlite3_stmt *p, 
  int i, 
  const char *zData, 
  int nData, 
  int eCopy
){
  if( zData && nData<0 ){
    nData = strlen(zData)+1;
  }
  return vdbeBindBlob((Vdbe *)p, i, zData, nData, eCopy, MEM_Str|MEM_Utf8);
}

int sqlite3_bind_text16(
  sqlite3_stmt *p, 
  int i, 
  const void *zData, 
  int nData, 
  int eCopy
){
  if( zData && nData<0 ){
    char *z = (char *)zData;
    while( (*z)!=0 && (*(z+1))!=0 ) z+=2;
    nData = (z - (char *)zData) + 2;
  }
 
  /* FIX ME - MEM_Utf16le? */
  return vdbeBindBlob((Vdbe *)p, i, zData, nData, eCopy, MEM_Str|MEM_Utf16le);
}

int sqlite3_bind_blob(
  sqlite3_stmt *p, 
  int i, 
  const void *zData, 
  int nData, 
  int eCopy
){
  return vdbeBindBlob((Vdbe *)p, i, zData, nData, eCopy, MEM_Blob);
}

/*
** Set the values of all variables.  Variable $1 in the original SQL will
** be the string azValue[0].  $2 will have the value azValue[1].  And
** so forth.  If a value is out of range (for example $3 when nValue==2)
** then its value will be NULL.
**
** This routine overrides any prior call.
*/
int sqlite3_bind(sqlite_vm *pVm, int i, const char *zVal, int len, int copy){


























  return sqlite3_bind_text(pVm, i, zVal, len, copy);
}


/*
** Delete an entire VDBE.
*/
void sqlite3VdbeDelete(Vdbe *p){
  int i;
  if( p==0 ) return;

  }
  for(i=0; i<p->nOp; i++){
    if( p->aOp[i].p3type==P3_DYNAMIC ){
      sqliteFree(p->aOp[i].p3);
    }
  }
  for(i=0; i<p->nVar; i++){
    if( p->azVar[i].flags&MEM_Dyn ){
      sqliteFree(p->azVar[i].z);
    }
  }
  sqliteFree(p->aOp);
  sqliteFree(p->aLabel);
  sqliteFree(p->aStack);
  p->magic = VDBE_MAGIC_DEAD;
  sqliteFree(p);
}