user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<strcoloncmp2>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %ecx,%r13d
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %esi,%ebx
  sub    $0x18,%rsp
  test   %rdi,%rdi
  setne  %al
  xor    %edi,%edi
  test   %rdx,%rdx
  mov    %esi,0xc(%rsp)
  setne  %dil
  and    %eax,%edi
  call   <assert@plt>
  lea    0x1(%rbx),%eax
  xor    %edi,%edi
  mov    %r12,%rbx
  cmp    $0x100,%eax
  setbe  %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmp    $0x1,%r13d
  setbe  %dil
  call   <assert@plt>
  movzbl (%r12),%eax
  cmp    $0x3a,%al
  jne    L174
  movzbl 0x1(%r12),%eax
  lea    0x1(%r12),%rbx
L174:
  test   %al,%al
  je     L60
  nopl   0x0(%rax,%rax,1)
L206:
  mov    $0x1,%edi
  cmp    %rbx,%r12
  je     L37
  xor    %edi,%edi
  cmpb   $0x3a,-0x1(%rbx)
  sete   %dil
L37:
  call   <assert@plt>
  movsbl 0x0(%rbp),%edi
  mov    %rbp,%r14
  test   %dil,%dil
  jne    L271
  jmp    L167
  nopw   0x0(%rax,%rax,1)
L269:
  call   <tolower@plt>
  movsbl (%rbx),%edi
  mov    %rax,%r15
  call   <tolower@plt>
  cmp    %rax,%r15
  jne    L167
L3:
  movsbl 0x1(%r14),%edi
  add    $0x1,%r14
  lea    0x1(%rbx),%rdx
  test   %dil,%dil
  je     L213
  mov    %rdx,%rbx
L271:
  movzbl (%rbx),%eax
  test   %al,%al
  je     L233
  test   %r13d,%r13d
  je     L269
  cmp    %dil,%al
  je     L3
L221:
  test   %al,%al
  je     L233
  cmp    $0x3a,%al
  jne    L6
  jmp    L233
  nopl   0x0(%rax)
L274:
  add    $0x1,%rbx
  movzbl (%rbx),%edx
  cmp    $0x3a,%al
  je     L26
  mov    %edx,%eax
L6:
  test   %al,%al
  jne    L274
L60:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L26:
  test   %dl,%dl
  jne    L206
  jmp    L60
  nopw   0x0(%rax,%rax,1)
L233:
  movsbl (%r14),%edi
  mov    0xc(%rsp),%ecx
  mov    %edi,%eax
  cmp    $0xffffffff,%ecx
  je     L70
  cmp    %ecx,%edi
  je     L70
L184:
  movzbl (%rbx),%eax
  jmp    L6
L213:
  movzbl 0x1(%rbx),%eax
  mov    %rdx,%rbx
  jmp    L221
  nopl   0x0(%rax)
L70:
  cmp    $0x8,%al
  je     L108
L180:
  call   <isdigit@plt>
  test   %eax,%eax
  jne    L184
  add    $0x18,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L167:
  movzbl (%rbx),%eax
  jmp    L221
L108:
  movzbl -0x1(%r14),%eax
  jmp    L249
  nopw   0x0(%rax,%rax,1)
L32:
  movsbl 0x2(%r14),%edi
  add    $0x2,%r14
  cmp    $0x8,%dil
  jne    L180
L249:
  cmp    %al,0x1(%r14)
  je     L32
  movsbl (%r14),%edi
  jmp    L180
```

assistant: ```c
int strcoloncmp2(char *candidate, int end, const char *list, int sen) {
  const char *l = list;
  char *c, c2;
  assert(candidate != NULL && list != NULL);
  assert(end >= -1 && end <= 255);
  assert(sen == 0 || sen == 1);
  if (*l == ':')
    l++;
  while (*l) {
    assert(l == list || l[-1] == ':');
    for (c = candidate; *c && *l; c++, l++)
      if ((sen && *c != *l) || (!sen && tolower(*c) != tolower(*l)))
        break;
    if ((*l == '\0' || *l == ':') && (*c == end || end == -1)) {
      if (*c == '\b') {
        c2 = c[-1];
        while (*c == '\b' && c[1] == c2)
          c += 2;
      }
      if (!isdigit(*c))
        return 1;
    }
    while (*l && *l++ != ':')
      ;
  }
  return 0;
}
```