user: 请将以下的汇编代码转换成C语言代码：

```asm
<match_rating_comparison>:
  endbr64
  push   %r14
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  push   %rbx
  call   <match_rating_codex@plt>
  mov    %r12,%rdi
  mov    %rax,%rbp
  call   <match_rating_codex@plt>
  test   %rbp,%rbp
  je     L172
  mov    %rax,%r12
  mov    %rbp,%rdi
  test   %rax,%rax
  je     L12
  call   <strlen@plt>
  mov    %r12,%rdi
  mov    %rax,%rbx
  call   <strlen@plt>
  mov    %rbx,%rdi
  sub    %rax,%rdi
  mov    %rax,%r13
  call   <abs@plt>
  cmp    $0x2,%eax
  jg     L93
  cmp    %r13,%rbx
  mov    %r13,%rdx
  cmovbe %rbx,%rdx
  xor    %eax,%eax
  test   %rdx,%rdx
  je     L48
  nop
L90:
  movzbl (%r12,%rax,1),%esi
  cmp    %sil,0x0(%rbp,%rax,1)
  jne    L2
  movb   $0x20,0x0(%rbp,%rax,1)
  movb   $0x20,(%r12,%rax,1)
L2:
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L90
L48:
  lea    -0x1(%rbx),%rax
  lea    -0x1(%r13),%rdx
  cmp    $0x1,%r13
  je     L88
  test   %rax,%rax
  je     L88
  nopw   0x0(%rax,%rax,1)
L164:
  lea    0x0(%rbp,%rax,1),%rdi
  movzbl (%rdi),%ecx
  cmp    $0x20,%cl
  je     L124
  lea    (%r12,%rdx,1),%r8
  sub    $0x1,%rdx
  movzbl (%r8),%esi
  cmp    $0x20,%sil
  je     L33
  cmp    %sil,%cl
  jne    L124
  movb   $0x20,(%rdi)
  movb   $0x20,(%r8)
L124:
  sub    $0x1,%rax
L33:
  test   %rax,%rax
  je     L88
  test   %rdx,%rdx
  jne    L164
L88:
  cmp    %r13,%rbx
  mov    %r12,%rdx
  cmova  %rbp,%rdx
  xor    %ecx,%ecx
  movzbl (%rdx),%eax
  test   %al,%al
  je     L81
  nopl   0x0(%rax,%rax,1)
L105:
  cmp    $0x20,%al
  setne  %al
  add    $0x1,%rdx
  movzbl %al,%eax
  add    %eax,%ecx
  movzbl (%rdx),%eax
  test   %al,%al
  jne    L105
  mov    $0x6,%r14d
  sub    %ecx,%r14d
L145:
  mov    %rbp,%rdi
  add    %r13,%rbx
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  cmp    $0x4,%rbx
  jbe    L109
  cmp    $0x7,%rbx
  jbe    L125
  cmp    $0xb,%rbx
  ja     L47
  xor    %eax,%eax
  cmp    $0x2,%r14d
  pop    %rbx
  pop    %rbp
  setg   %al
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopl   0x0(%rax)
L93:
  mov    %rbp,%rdi
  call   <free@plt>
  mov    %r12,%rdi
L12:
  call   <free@plt>
  pop    %rbx
  mov    $0xffffffff,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  xchg   %ax,%ax
L47:
  xor    %eax,%eax
  cmp    $0x1,%r14d
  pop    %rbx
  pop    %rbp
  setg   %al
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopw   0x0(%rax,%rax,1)
L81:
  mov    $0x6,%r14d
  jmp    L145
  nopl   0x0(%rax,%rax,1)
L109:
  xor    %eax,%eax
  cmp    $0x4,%r14d
  pop    %rbx
  pop    %rbp
  setg   %al
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopw   0x0(%rax,%rax,1)
L172:
  pop    %rbx
  mov    $0xffffffff,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  xchg   %ax,%ax
L125:
  xor    %eax,%eax
  cmp    $0x3,%r14d
  pop    %rbx
  pop    %rbp
  setg   %al
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

assistant: ```c
int match_rating_comparison(const char *s1, const char *s2) {
  size_t s1c_len, s2c_len;
  size_t i, j;
  int diff;
  char *longer;
  char *s1_codex = match_rating_codex(s1);
  char *s2_codex = match_rating_codex(s2);
  if (!s1_codex) {
    return -1;
  }
  if (!s2_codex) {
    free(s1_codex);
    return -1;
  }
  s1c_len = strlen(s1_codex);
  s2c_len = strlen(s2_codex);
  if (abs(s1c_len - s2c_len) >= 3) {
    free(s1_codex);
    free(s2_codex);
    return -1;
  }
  for (i = 0; i < s1c_len && i < s2c_len; i++) {
    if (s1_codex[i] == s2_codex[i]) {
      s1_codex[i] = ' ';
      s2_codex[i] = ' ';
    }
  }
  i = s1c_len - 1;
  j = s2c_len - 1;
  while (i != 0 && j != 0) {
    if (s1_codex[i] == ' ') {
      i--;
      continue;
    }
    if (s2_codex[j] == ' ') {
      j--;
      continue;
    }
    if (s1_codex[i] == s2_codex[j]) {
      s1_codex[i] = ' ';
      s2_codex[j] = ' ';
    }
    i--;
    j--;
  }
  if (s1c_len > s2c_len) {
    longer = s1_codex;
  } else {
    longer = s2_codex;
  }
  for (diff = 0; *longer; longer++) {
    if (*longer != ' ') {
      diff++;
    }
  }
  free(s1_codex);
  free(s2_codex);
  diff = 6 - diff;
  i = s1c_len + s2c_len;
  if (i <= 4) {
    return diff >= 5;
  } else if (i <= 7) {
    return diff >= 4;
  } else if (i <= 11) {
    return diff >= 3;
  } else {
    return diff >= 2;
  }
}
```