// File: /workspace/github_c_makefile_star2_O3/genometools[P]genometools/src/external/sqlite-3.33.0/sqlite3.c
// Function: backupOnePage
static int backupOnePage(
  sqlite3_backup *p,              /* Backup handle */
  Pgno iSrcPg,                    /* Source database page to backup */
  const u8 *zSrcData,             /* Source database page data */
  int bUpdate                     /* True for an update, false otherwise */
){
  Pager * const pDestPager = sqlite3BtreePager(p->pDest);
  const int nSrcPgsz = sqlite3BtreeGetPageSize(p->pSrc);
  int nDestPgsz = sqlite3BtreeGetPageSize(p->pDest);
  const int nCopy = MIN(nSrcPgsz, nDestPgsz);
  const i64 iEnd = (i64)iSrcPg*(i64)nSrcPgsz;
  int rc = SQLITE_OK;
  i64 iOff;

  assert( sqlite3BtreeGetReserveNoMutex(p->pSrc)>=0 );
  assert( p->bDestLocked );
  assert( !isFatalError(p->rc) );
  assert( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) );
  assert( zSrcData );

  /* Catch the case where the destination is an in-memory database and the
  ** page sizes of the source and destination differ.
  */
  if( nSrcPgsz!=nDestPgsz && sqlite3PagerIsMemdb(pDestPager) ){
    rc = SQLITE_READONLY;
  }

  /* This loop runs once for each destination page spanned by the source
  ** page. For each iteration, variable iOff is set to the byte offset
  ** of the destination page.
  */
  for(iOff=iEnd-(i64)nSrcPgsz; rc==SQLITE_OK && iOff<iEnd; iOff+=nDestPgsz){
    DbPage *pDestPg = 0;
    Pgno iDest = (Pgno)(iOff/nDestPgsz)+1;
    if( iDest==PENDING_BYTE_PAGE(p->pDest->pBt) ) continue;
    if( SQLITE_OK==(rc = sqlite3PagerGet(pDestPager, iDest, &pDestPg, 0))
     && SQLITE_OK==(rc = sqlite3PagerWrite(pDestPg))
    ){
      const u8 *zIn = &zSrcData[iOff%nSrcPgsz];
      u8 *zDestData = sqlite3PagerGetData(pDestPg);
      u8 *zOut = &zDestData[iOff%nDestPgsz];

      /* Copy the data from the source page into the destination page.
      ** Then clear the Btree layer MemPage.isInit flag. Both this module
      ** and the pager code use this trick (clearing the first byte
      ** of the page 'extra' space to invalidate the Btree layers
      ** cached parse of the page). MemPage.isInit is marked
      ** "MUST BE FIRST" for this purpose.
      */
      memcpy(zOut, zIn, nCopy);
      ((u8 *)sqlite3PagerGetExtra(pDestPg))[0] = 0;
      if( iOff==0 && bUpdate==0 ){
        sqlite3Put4byte(&zOut[28], sqlite3BtreeLastPage(p->pSrc));
      }
    }
    sqlite3PagerUnref(pDestPg);
  }

  return rc;
}

// Assembly:
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
subq $0x38, %rsp
movl %ecx, 0x1c(%rsp)
movq %rdx, 0x30(%rsp)
movq %rdi, %r15
movq 0x8(%rdi), %rax
movq 0x28(%rdi), %rcx
movq 0x8(%rax), %rax
movq (%rax), %rdx
movq %rdx, 0x20(%rsp)
movq 0x8(%rcx), %rcx
movslq 0x34(%rcx), %rcx
movslq 0x34(%rax), %rbp
xorl %ebx, %ebx
movl %ebp, %eax
cmpl %ebp, %ecx
movq %rcx, 0x10(%rsp)
cmovll %ecx, %eax
je 0x27721f
xorl %ebx, %ebx
movq 0x20(%rsp), %rcx
cmpb $0x0, 0x10(%rcx)
setne %bl
shll $0x3, %ebx
testl %ebx, %ebx
jne 0x277319
cmpl $0x0, 0x10(%rsp)
jle 0x277319
movl %esi, %r12d
movq 0x10(%rsp), %rcx
imulq %rcx, %r12
movq %r12, %r13
subq %rcx, %r13
cltq
movq %rax, 0x28(%rsp)
movq $0x0, 0x8(%rsp)
movq %r13, %rax
cqto
idivq %rbp
movq %rax, %rsi
movq %rdx, %r14
movl 0x244858(%rip), %eax    # 0x4bbac0
movq 0x8(%r15), %rcx
movq 0x8(%rcx), %rcx
xorl %edx, %edx
divl 0x34(%rcx)
movl $0x0, %ebx
cmpl %esi, %eax
je 0x2772b5
incl %esi
movq 0x20(%rsp), %rdi
leaq 0x8(%rsp), %rdx
xorl %ecx, %ecx
callq *0x108(%rdi)
testl %eax, %eax
jne 0x2772a4
movq 0x8(%rsp), %rdi
callq 0x2774a1
testl %eax, %eax
je 0x2772c3
movl %eax, %ebx
movq 0x8(%rsp), %rdi
testq %rdi, %rdi
je 0x2772b5
callq 0x28ab87
testl %ebx, %ebx
jne 0x277319
addq %rbp, %r13
cmpq %r12, %r13
jl 0x27724b
jmp 0x277319
movq %r13, %rax
cqto
idivq 0x10(%rsp)
movq 0x30(%rsp), %rax
leaq (%rdx,%rax), %rsi
movq 0x8(%rsp), %rax
addq 0x8(%rax), %r14
movq %r14, %rdi
movq 0x28(%rsp), %rdx
callq 0x17660
xorl %ebx, %ebx
movq 0x8(%rsp), %rax
movq 0x10(%rax), %rax
movb $0x0, (%rax)
cmpl $0x0, 0x1c(%rsp)
jne 0x2772a6
testq %r13, %r13
jne 0x2772a6
movq 0x28(%r15), %rax
movq 0x8(%rax), %rax
movl 0x40(%rax), %eax
bswapl %eax
movl %eax, 0x1c(%r14)
jmp 0x2772a6
movl %ebx, %eax
addq $0x38, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq