user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<strtoxl>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %edx,-0x34(%rbp)
  mov    %ecx,-0x38(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movq   $0x0,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
  jmp    L233
L232:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
L233:
  movsbl -0x1d(%rbp),%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L232
  cmpb   $0x2d,-0x1d(%rbp)
  jne    L388
  orl    $0x2,-0x38(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
  jmp    L449
L388:
  cmpb   $0x2b,-0x1d(%rbp)
  jne    L449
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
L449:
  cmpl   $0x0,-0x34(%rbp)
  js     L13
  cmpl   $0x1,-0x34(%rbp)
  je     L13
  cmpl   $0x24,-0x34(%rbp)
  jle    L200
L13:
  cmpq   $0x0,-0x30(%rbp)
  je     L287
  mov    -0x30(%rbp),%rax
  mov    -0x28(%rbp),%rdx
  mov    %rdx,(%rax)
L287:
  mov    $0x0,%eax
  jmp    L414
L200:
  cmpl   $0x0,-0x34(%rbp)
  jne    L344
  cmpb   $0x30,-0x1d(%rbp)
  je     L86
  movl   $0xa,-0x34(%rbp)
  jmp    L344
L86:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  je     L331
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x58,%al
  jne    L386
L331:
  movl   $0x10,-0x34(%rbp)
  jmp    L344
L386:
  movl   $0x8,-0x34(%rbp)
L344:
  cmpl   $0x10,-0x34(%rbp)
  jne    L365
  cmpb   $0x30,-0x1d(%rbp)
  jne    L365
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  je     L190
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x58,%al
  jne    L365
L190:
  addq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
L365:
  mov    -0x34(%rbp),%eax
  movslq %eax,%rcx
  mov    $0xffffffff,%eax
  mov    $0x0,%edx
  div    %rcx
  mov    %rax,-0x8(%rbp)
L299:
  movsbl -0x1d(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  je     L396
  movsbl -0x1d(%rbp),%eax
  sub    $0x30,%eax
  mov    %eax,-0x1c(%rbp)
  jmp    L28
L396:
  movsbl -0x1d(%rbp),%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %rax,%rax
  je     L283
  movsbl -0x1d(%rbp),%eax
  mov    %eax,%edi
  call   <toupper@plt>
  movsbl %al,%eax
  sub    $0x37,%eax
  mov    %eax,-0x1c(%rbp)
L28:
  mov    -0x34(%rbp),%eax
  cmp    %eax,-0x1c(%rbp)
  jae    L337
  orl    $0x8,-0x38(%rbp)
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jb     L377
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jne    L11
  mov    -0x1c(%rbp),%ecx
  mov    -0x34(%rbp),%eax
  movslq %eax,%rsi
  mov    $0xffffffff,%eax
  mov    $0x0,%edx
  div    %rsi
  mov    %rdx,%rax
  cmp    %rax,%rcx
  ja     L11
L377:
  mov    -0x34(%rbp),%eax
  cltq
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x1c(%rbp),%eax
  add    %rdx,%rax
  mov    %rax,-0x10(%rbp)
  jmp    L329
L11:
  orl    $0x4,-0x38(%rbp)
L329:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x1d(%rbp)
  jmp    L299
L283:
  nop
  jmp    L306
L337:
  nop
L306:
  subq   $0x1,-0x18(%rbp)
  mov    -0x38(%rbp),%eax
  and    $0x8,%eax
  test   %eax,%eax
  jne    L197
  cmpq   $0x0,-0x30(%rbp)
  je     L314
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
L314:
  movq   $0x0,-0x10(%rbp)
  jmp    L78
L197:
  mov    -0x38(%rbp),%eax
  and    $0x4,%eax
  test   %eax,%eax
  jne    L357
  mov    -0x38(%rbp),%eax
  and    $0x1,%eax
  test   %eax,%eax
  jne    L78
  mov    -0x38(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L247
  movabs $0xffffffff7fffffff,%rax
  cmp    %rax,-0x10(%rbp)
  jbe    L357
L247:
  mov    -0x38(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  jne    L78
  mov    $0x80000000,%eax
  cmp    %rax,-0x10(%rbp)
  jb     L78
L357:
  mov    -0x38(%rbp),%eax
  and    $0x1,%eax
  test   %eax,%eax
  je     L240
  mov    $0xffffffff,%eax
  mov    %rax,-0x10(%rbp)
  jmp    L78
L240:
  mov    -0x38(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L73
  movq   $0xffffffff80000000,-0x10(%rbp)
  jmp    L78
L73:
  movq   $0x7fffffff,-0x10(%rbp)
L78:
  cmpq   $0x0,-0x30(%rbp)
  je     L236
  mov    -0x30(%rbp),%rax
  mov    -0x18(%rbp),%rdx
  mov    %rdx,(%rax)
L236:
  mov    -0x38(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L64
  mov    -0x10(%rbp),%rax
  neg    %rax
  mov    %rax,-0x10(%rbp)
L64:
  mov    -0x10(%rbp),%rax
L414:
  leave
  ret
```

assistant: ```c
unsigned long strtoxl(const char *nptr, char **endptr, int ibase, int flags) {
  const unsigned char *p;
  char c;
  unsigned long number;
  unsigned digval;
  unsigned long maxval;
  p = (const unsigned char *)nptr;
  number = 0;
  c = *p++;
  while (isspace(c))
    c = *p++;
  if (c == '-') {
    flags |= 2;
    c = *p++;
  } else if (c == '+') {
    c = *p++;
  }
  if (ibase < 0 || ibase == 1 || ibase > 36) {
    if (endptr)
      *endptr = (char *)nptr;
    return 0L;
  } else if (ibase == 0) {
    if (c != '0') {
      ibase = 10;
    } else if (*p == 'x' || *p == 'X') {
      ibase = 16;
    } else {
      ibase = 8;
    }
  }
  if (ibase == 16) {
    if (c == '0' && (*p == 'x' || *p == 'X')) {
      ++p;
      c = *p++;
    }
  }
  maxval = (2147483647L * 2UL + 1UL) / ibase;
  for (;;) {
    if (isdigit(c)) {
      digval = c - '0';
    } else if (isalpha(c)) {
      digval = toupper(c) - 'A' + 10;
    } else {
      break;
    }
    if (digval >= (unsigned)ibase)
      break;
    flags |= 8;
    if (number < maxval || (number == maxval && (unsigned long)digval <= (2147483647L * 2UL + 1UL) % ibase)) {
      number = number * ibase + digval;
    } else {
      flags |= 4;
    }
    c = *p++;
  }
  --p;
  if (!(flags & 8)) {
    if (endptr)
      p = (const unsigned char *)nptr;
    number = 0;
  } else if ((flags & 4) || (!(flags & 1) && (((flags & 2) && (number < (-2147483647L - 1L))) || (!(flags & 2) && (number > 2147483647L))))) {
    if (flags & 1) {
      number = (2147483647L * 2UL + 1UL);
    } else if (flags & 2) {
      number = (-2147483647L - 1L);
    } else {
      number = 2147483647L;
    }
  }
  if (endptr)
    *endptr = (char *)p;
  if (flags & 2)
    number = (unsigned long)(-(long)number);
  return number;
}
```