// File: /workspace/github_c_makefile_star2_O2/shifengbin[P]bishe/Output/../Persistence/sqlite3.c
// Function: clearCell
static int clearCell(
  MemPage *pPage,          /* The page that contains the Cell */
  unsigned char *pCell,    /* First byte of the Cell */
  u16 *pnSize              /* Write the size of the Cell here */
){
  BtShared *pBt = pPage->pBt;
  CellInfo info;
  Pgno ovflPgno;
  int rc;
  int nOvfl;
  u32 ovflPageSize;

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  pPage->xParseCell(pPage, pCell, &info);
  *pnSize = info.nSize;
  if( info.nLocal==info.nPayload ){
    return SQLITE_OK;  /* No overflow pages. Return without doing anything */
  }
  if( pCell+info.nSize-1 > pPage->aData+pPage->maskPage ){
    return SQLITE_CORRUPT_BKPT;  /* Cell extends past end of page */
  }
  ovflPgno = get4byte(pCell + info.nSize - 4);
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (info.nPayload - info.nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( nOvfl>0 || 
    (CORRUPT_DB && (info.nPayload + ovflPageSize)<ovflPageSize)
  );
  while( nOvfl-- ){
    Pgno iNext = 0;
    MemPage *pOvfl = 0;
    if( ovflPgno<2 || ovflPgno>btreePagecount(pBt) ){
      /* 0 is not a legal page number and page 1 cannot be an 
      ** overflow page. Therefore if ovflPgno<2 or past the end of the 
      ** file the database must be corrupt. */
      return SQLITE_CORRUPT_BKPT;
    }
    if( nOvfl ){
      rc = getOverflowPage(pBt, ovflPgno, &pOvfl, &iNext);
      if( rc ) return rc;
    }

    if( ( pOvfl || ((pOvfl = btreePageLookup(pBt, ovflPgno))!=0) )
     && sqlite3PagerPageRefcount(pOvfl->pDbPage)!=1
    ){
      /* There is no reason any cursor should have an outstanding reference 
      ** to an overflow page belonging to a cell that is being deleted/updated.
      ** So if there exists more than one reference to this page, then it 
      ** must not really be an overflow page and the database must be corrupt. 
      ** It is helpful to detect this before calling freePage2(), as 
      ** freePage2() may zero the page contents if secure-delete mode is
      ** enabled. If this 'overflow' page happens to be a page that the
      ** caller is iterating through or using in some other way, this
      ** can be problematic.
      */
      rc = SQLITE_CORRUPT_BKPT;
    }else{
      rc = freePage2(pBt, pOvfl, ovflPgno);
    }

    if( pOvfl ){
      sqlite3PagerUnref(pOvfl->pDbPage);
    }
    if( rc ) return rc;
    ovflPgno = iNext;
  }
  return SQLITE_OK;
}

// Assembly:
pushq %rbp
movq %rsp, %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
subq $0x28, %rsp
movq %rdx, %r14
movq %rsi, %r15
movq %rdi, %r12
movq 0x48(%rdi), %rbx
leaq -0x50(%rbp), %r13
movq %r13, %rdx
callq *0x80(%rdi)
movzwl 0x16(%r13), %esi
movw %si, (%r14)
movzwl 0x14(%r13), %r14d
movl 0x10(%r13), %r13d
xorl %eax, %eax
cmpl %r14d, %r13d
je 0x31d59
leaq (%r15,%rsi), %rcx
decq %rcx
movzwl 0x14(%r12), %edx
addq 0x50(%r12), %rdx
cmpq %rdx, %rcx
jbe 0x31c62
movl $0xeebf, %edi           # imm = 0xEEBF
callq 0x1ec07
pushq $0xb
popq %rax
jmp 0x31d59
addq %rsi, %r15
addq $-0x4, %r15
movq %r15, %rdi
callq 0x1c9e4
movl %eax, %r12d
movl 0x34(%rbx), %ecx
notl %r14d
addl %r14d, %r13d
leal (%rcx,%r13), %eax
addl $-0x4, %eax
addl $-0x4, %ecx
xorl %edx, %edx
divl %ecx
movl %eax, %r15d
pushq $0xb
popq %r14
subl $0x1, %r15d
jb 0x31d4f
andl $0x0, -0x2c(%rbp)
andq $0x0, -0x38(%rbp)
cmpl $0x2, %r12d
jb 0x31d3f
cmpl 0x3c(%rbx), %r12d
ja 0x31d3f
testl %r15d, %r15d
je 0x31cde
movq %rbx, %rdi
movl %r12d, %esi
leaq -0x38(%rbp), %rdx
leaq -0x2c(%rbp), %rcx
callq 0x23a6f
testl %eax, %eax
jne 0x31d53
movq -0x38(%rbp), %rsi
testq %rsi, %rsi
jne 0x31cf5
movq %rbx, %rdi
movl %r12d, %esi
callq 0x33b00
movq %rax, %rsi
movq %rax, -0x38(%rbp)
testq %rax, %rax
je 0x31d0f
movq 0x70(%rsi), %rax
cmpw $0x1, 0x2e(%rax)
je 0x31d11
movl $0xeee3, %edi           # imm = 0xEEE3
callq 0x1ec07
movl %r14d, %r13d
jmp 0x31d1f
xorl %esi, %esi
movq %rbx, %rdi
movl %r12d, %edx
callq 0x33b33
movl %eax, %r13d
movq -0x38(%rbp), %rax
testq %rax, %rax
je 0x31d31
movq 0x70(%rax), %rdi
callq 0xfbd7
testl %r13d, %r13d
jne 0x31d56
movl -0x2c(%rbp), %r12d
jmp 0x31c92
movl $0xeecf, %edi           # imm = 0xEECF
callq 0x1ec07
pushq $0xb
popq %r13
jmp 0x31d56
xorl %eax, %eax
jmp 0x31d59
movl %eax, %r13d
movl %r13d, %eax
addq $0x28, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq