user: 下面的汇编指令对应的C源代码是什么：

```asm
<latlon2ul>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  xor    %ebx,%ebx
  sub    $0x28,%rsp
  mov    (%rdi),%rbp
  mov    %rdi,0x8(%rsp)
  mov    %rsi,0x10(%rsp)
  jmp    L325
  nopl   0x0(%rax,%rax,1)
L201:
  movsbl -0x1(%r12),%eax
  lea    (%rbx,%rbx,4),%edx
  mov    %r12,%rbp
  lea    -0x30(%rax,%rdx,2),%ebx
L325:
  movsbl 0x0(%rbp),%edi
  lea    0x1(%rbp),%r12
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L201
  jmp    L305
  nopl   0x0(%rax)
L52:
  add    $0x1,%r12
L305:
  movsbl 0x0(%rbp),%edi
  mov    %rbp,%r14
  mov    %r12,%rbp
  call   <isspace@plt>
  test   %rax,%rax
  jne    L52
  movsbl (%r14),%edi
  xor    %ebp,%ebp
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L106
  jmp    L346
  nopl   (%rax)
L109:
  movsbl -0x1(%r12),%eax
  lea    0x0(%rbp,%rbp,4),%edx
  mov    %r12,%r14
  lea    -0x30(%rax,%rdx,2),%ebp
L106:
  movsbl (%r14),%edi
  lea    0x1(%r14),%r12
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L109
  jmp    L34
  nopl   (%rax)
L54:
  add    $0x1,%r12
L34:
  movsbl (%r14),%edi
  mov    %r14,%r15
  mov    %r12,%r14
  call   <isspace@plt>
  test   %rax,%rax
  jne    L54
  movsbl (%r15),%edi
  xor    %r12d,%r12d
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L49
  movl   $0x0,0x1c(%rsp)
  mov    %r15,%r14
  xor    %r12d,%r12d
L12:
  movzbl (%r14),%eax
  lea    -0x45(%rax),%ecx
  cmp    $0x32,%cl
  ja     L146
L123:
  movabs $0x4400000044000,%rsi
  mov    $0x1,%eax
  shl    %cl,%rax
  test   %rsi,%rax
  jne    L333
  movabs $0x20100000201,%rsi
  xor    %r15d,%r15d
  test   %rsi,%rax
  jne    L15
L99:
  mov    $0x1,%eax
  shl    %cl,%rax
  movabs $0x420000004200,%rcx
  test   %rcx,%rax
  jne    L342
  movabs $0x4000100040001,%rcx
  test   %rcx,%rax
  setne  %al
  movzbl %al,%eax
  add    %eax,%eax
L64:
  mov    0x10(%rsp),%rsi
  add    $0x1,%r14
  mov    %eax,(%rsi)
  jmp    L210
  nopl   0x0(%rax)
L7:
  add    $0x1,%r14
L210:
  movsbl (%r14),%edi
  call   <isspace@plt>
  test   %rax,%rax
  je     L7
  movsbl (%r14),%edi
  call   <isspace@plt>
  test   %rax,%rax
  je     L26
  nopl   0x0(%rax,%rax,1)
L259:
  movsbl 0x1(%r14),%edi
  add    $0x1,%r14
  call   <isspace@plt>
  test   %rax,%rax
  jne    L259
L26:
  mov    0x8(%rsp),%rax
  mov    %r14,(%rax)
  add    $0x28,%rsp
  mov    %r15d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L267:
  movsbl -0x1(%r14),%eax
  lea    (%r12,%r12,4),%ecx
  mov    %r14,%r15
  lea    -0x30(%rax,%rcx,2),%r12d
L49:
  movsbl (%r15),%edi
  lea    0x1(%r15),%r14
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L267
  cmpb   $0x2e,(%r15)
  movl   $0x0,0x1c(%rsp)
  jne    L211
  jmp    L347
  cs nopw 0x0(%rax,%rax,1)
L290:
  add    $0x1,%r14
L211:
  movsbl (%r15),%edi
  mov    %r15,%r13
  mov    %r14,%r15
  call   <isspace@plt>
  test   %rax,%rax
  je     L290
  nopl   0x0(%rax,%rax,1)
L77:
  movsbl 0x0(%r13),%edi
  mov    %r13,%r14
  add    $0x1,%r13
  call   <isspace@plt>
  test   %rax,%rax
  jne    L77
  jmp    L12
  nopl   0x0(%rax,%rax,1)
L346:
  movzbl (%r14),%eax
  movl   $0x0,0x1c(%rsp)
  xor    %r12d,%r12d
  xor    %ebp,%ebp
  lea    -0x45(%rax),%ecx
  cmp    $0x32,%cl
  jbe    L123
L146:
  xor    %r15d,%r15d
  xor    %eax,%eax
  jmp    L64
L15:
  imul   $0x3c,%ebx,%eax
  mov    0x1c(%rsp),%esi
  add    %ebp,%eax
  imul   $0x3c,%eax,%eax
  add    %r12d,%eax
  imul   $0x3e8,%eax,%eax
  lea    -0x80000000(%rsi,%rax,1),%r15d
  jmp    L99
L333:
  imul   $0x3c,%ebx,%eax
  mov    $0x80000000,%r15d
  sub    0x1c(%rsp),%r15d
  add    %ebp,%eax
  imul   $0x3c,%eax,%eax
  add    %r12d,%eax
  imul   $0x3e8,%eax,%eax
  sub    %eax,%r15d
  jmp    L99
L347:
  movsbl 0x1(%r15),%edi
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L127
  mov    %r14,%r15
  lea    0x1(%r14),%r14
  jmp    L211
L342:
  mov    $0x1,%eax
  jmp    L64
L127:
  movsbl 0x1(%r15),%eax
  movsbl 0x2(%r15),%edi
  sub    $0x30,%eax
  imul   $0x64,%eax,%eax
  mov    %eax,0x1c(%rsp)
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L176
  add    $0x2,%r15
  lea    0x1(%r15),%r14
  jmp    L211
L176:
  movsbl 0x2(%r15),%eax
  mov    0x1c(%rsp),%esi
  movsbl 0x3(%r15),%edi
  lea    -0xf0(%rax,%rax,4),%eax
  lea    (%rsi,%rax,2),%eax
  mov    %eax,0x1c(%rsp)
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L27
  add    $0x3,%r15
  lea    0x1(%r15),%r14
  jmp    L211
L27:
  movsbl 0x3(%r15),%eax
  mov    0x1c(%rsp),%esi
  add    $0x4,%r15
  lea    0x1(%r15),%r14
  lea    -0x30(%rsi,%rax,1),%eax
  mov    %eax,0x1c(%rsp)
  jmp    L211
```

assistant: ```c
u_int32_t latlon2ul(char **latlonstrptr, int *which) {
  char *cp;
  u_int32_t retval;
  int deg = 0, min = 0, secs = 0, secsfrac = 0;
  cp = *latlonstrptr;
  while (isdigit(*cp))
    deg = deg * 10 + (*cp++ - '0');
  while (isspace(*cp))
    cp++;
  if (!(isdigit(*cp)))
    goto fndhemi;
  while (isdigit(*cp))
    min = min * 10 + (*cp++ - '0');
  while (isspace(*cp))
    cp++;
  if (!(isdigit(*cp)))
    goto fndhemi;
  while (isdigit(*cp))
    secs = secs * 10 + (*cp++ - '0');
  if (*cp == '.') {
    cp++;
    if (isdigit(*cp)) {
      secsfrac = (*cp++ - '0') * 100;
      if (isdigit(*cp)) {
        secsfrac += (*cp++ - '0') * 10;
        if (isdigit(*cp)) {
          secsfrac += (*cp++ - '0');
        }
      }
    }
  }
  while (!isspace(*cp))
    cp++;
  while (isspace(*cp))
    cp++;
fndhemi:
  switch (*cp) {
  case 'N':
  case 'n':
  case 'E':
  case 'e':
    retval = ((unsigned)1 << 31) + (((((deg * 60) + min) * 60) + secs) * 1000) + secsfrac;
    break;
  case 'S':
  case 's':
  case 'W':
  case 'w':
    retval = ((unsigned)1 << 31) - (((((deg * 60) + min) * 60) + secs) * 1000) - secsfrac;
    break;
  default:
    retval = 0;
    break;
  }
  switch (*cp) {
  case 'N':
  case 'n':
  case 'S':
  case 's':
    *which = 1;
    break;
  case 'E':
  case 'e':
  case 'W':
  case 'w':
    *which = 2;
    break;
  default:
    *which = 0;
    break;
  }
  cp++;
  while (!isspace(*cp))
    cp++;
  while (isspace(*cp))
    cp++;
  *latlonstrptr = cp;
  return (retval);
}
```