user: Demonstrate the C code that generates the assembly output below:

```asm
<mysql_query_digest_and_first_comment>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %esi,-0x3c(%rbp)
  mov    %rdx,-0x48(%rbp)
  movl   $0x0,-0x28(%rbp)
  mov    -0x3c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movb   $0x0,-0x2d(%rbp)
  movb   $0x0,-0x2c(%rbp)
  movb   $0x0,-0x2b(%rbp)
  movb   $0x0,-0x2a(%rbp)
  movl   $0x0,-0x24(%rbp)
  movb   $0x0,-0x29(%rbp)
  jmp    L141
L62:
  cmpb   $0x0,-0x2b(%rbp)
  jne    L483
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  cmpb   $0x2f,-0x2d(%rbp)
  jne    L367
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2a,%al
  jne    L367
  movb   $0x1,-0x2b(%rbp)
  jmp    L676
L367:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x23,%al
  jne    L498
  movb   $0x2,-0x2b(%rbp)
  jmp    L676
L498:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x27,%al
  je     L168
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x22,%al
  jne    L436
L168:
  movb   $0x3,-0x2b(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0x2c(%rbp)
  jmp    L676
L436:
  movsbl -0x2d(%rbp),%eax
  mov    %eax,%edi
  call   <is_token_char@plt>
  test   %rax,%rax
  je     L169
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_digit_char@plt>
  test   %rax,%rax
  je     L169
  movb   $0x4,-0x2b(%rbp)
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  jne    L676
  jmp    L141
L169:
  movb   $0x0,-0x2b(%rbp)
  cmpb   $0x0,-0x29(%rbp)
  jne    L688
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_space_char@plt>
  test   %rax,%rax
  je     L688
  addq   $0x1,-0x38(%rbp)
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L688:
  cmpb   $0x0,-0x29(%rbp)
  jne    L426
  movb   $0x1,-0x29(%rbp)
L426:
  movsbl -0x2d(%rbp),%eax
  mov    %eax,%edi
  call   <is_space_char@plt>
  test   %rax,%rax
  je     L676
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_space_char@plt>
  test   %rax,%rax
  je     L676
  movb   $0x20,-0x2d(%rbp)
  mov    -0x20(%rbp),%rax
  movb   $0x20,(%rax)
  addq   $0x1,-0x38(%rbp)
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L483:
  cmpb   $0x1,-0x2b(%rbp)
  jne    L635
  cmpb   $0x0,-0x2a(%rbp)
  jne    L600
  movb   $0x1,-0x2a(%rbp)
L600:
  cmpb   $0x1,-0x2a(%rbp)
  jne    L635
  cmpl   $0x3fe,-0x24(%rbp)
  jg     L329
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_space_char@plt>
  test   %rax,%rax
  jne    L360
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  jmp    L257
L360:
  mov    $0x20,%eax
L257:
  mov    -0x24(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x48(%rbp),%rdx
  add    %rcx,%rdx
  mov    %al,(%rdx)
  addl   $0x1,-0x24(%rbp)
L329:
  cmpb   $0x2a,-0x2d(%rbp)
  jne    L635
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L635
  cmpl   $0x1,-0x24(%rbp)
  jle    L380
  subl   $0x2,-0x24(%rbp)
L380:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  movb   $0x2,-0x2a(%rbp)
L635:
  cmpb   $0x1,-0x2b(%rbp)
  jne    L590
  cmpb   $0x2a,-0x2d(%rbp)
  jne    L590
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  je     L210
L590:
  cmpb   $0x2,-0x2b(%rbp)
  jne    L35
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0xa,%al
  je     L210
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0xd,%al
  jne    L35
L210:
  cmpb   $0x1,-0x2b(%rbp)
  jne    L97
  mov    -0x18(%rbp),%rax
  sub    $0x1,%rax
  jmp    L298
L97:
  mov    -0x18(%rbp),%rax
L298:
  mov    %rax,-0x20(%rbp)
  movb   $0x20,-0x2d(%rbp)
  movb   $0x0,-0x2b(%rbp)
  addq   $0x1,-0x38(%rbp)
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L35:
  cmpb   $0x3,-0x2b(%rbp)
  jne    L681
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  jne    L566
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x3f,(%rax)
  movb   $0x0,-0x2b(%rbp)
  jmp    L634
L566:
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  cmp    %rax,-0x20(%rbp)
  jbe    L303
  cmpb   $0x5c,-0x2d(%rbp)
  jne    L152
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x5c,%al
  je     L23
L152:
  cmpb   $0x5c,-0x2d(%rbp)
  jne    L170
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,-0x2c(%rbp)
  je     L23
L170:
  movzbl -0x2d(%rbp),%eax
  cmp    -0x2c(%rbp),%al
  jne    L303
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,-0x2c(%rbp)
  jne    L303
L23:
  movb   $0x58,-0x2d(%rbp)
  addq   $0x1,-0x38(%rbp)
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L303:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,-0x2c(%rbp)
  jne    L676
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  je     L490
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    %al,-0x2c(%rbp)
  je     L676
L490:
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x3f,(%rax)
  movb   $0x0,-0x2b(%rbp)
  mov    -0x28(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jge    L588
  addq   $0x1,-0x38(%rbp)
L588:
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L681:
  cmpb   $0x4,-0x2b(%rbp)
  jne    L676
  mov    -0x18(%rbp),%rax
  cmp    -0x20(%rbp),%rax
  jne    L264
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x3f,(%rax)
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L264:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_token_char@plt>
  test   %rax,%rax
  jne    L547
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  jne    L676
L547:
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <is_digit_string@plt>
  test   %rax,%rax
  je     L660
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x3f,(%rax)
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  jne    L660
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_token_char@plt>
  test   %rax,%rax
  je     L425
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  mov    -0x38(%rbp),%rdx
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L425:
  addl   $0x1,-0x28(%rbp)
  jmp    L141
L660:
  movb   $0x0,-0x2b(%rbp)
L676:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <is_space_char@plt>
  test   %rax,%rax
  jne    L617
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%edx
  jmp    L85
L617:
  mov    $0x20,%edx
L85:
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x20(%rbp)
  mov    %dl,(%rax)
  mov    -0x38(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x38(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x2d(%rbp)
  addl   $0x1,-0x28(%rbp)
L141:
  mov    -0x28(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L62
L634:
  mov    -0x20(%rbp),%rax
  cmp    -0x10(%rbp),%rax
  jbe    L357
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  subq   $0x1,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L357
  mov    -0x8(%rbp),%rax
  movb   $0x0,(%rax)
L357:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
char *mysql_query_digest_and_first_comment(char *s, int len, char *first_comment) {
  int i = 0;
  char *r = (char *)malloc(len + sizeof(char));
  char *p_r = r;
  char *p_r_t = r;
  char prev_char = 0;
  char qutr_char = 0;
  char flag = 0;
  char fc = 0;
  int fc_len = 0;
  char fns = 0;
  while (i < len) {
    if (flag == 0) {
      p_r_t = p_r;
      if (prev_char == '/' && *s == '*') {
        flag = 1;
      } else if (*s == '#') {
        flag = 2;
      } else if (*s == '\'' || *s == '"') {
        flag = 3;
        qutr_char = *s;
      } else if (is_token_char(prev_char) && is_digit_char(*s)) {
        flag = 4;
        if (len == i + 1)
          continue;
      } else {
        flag = 0;
        if (fns == 0 && is_space_char(*s)) {
          s++;
          i++;
          continue;
        }
        if (fns == 0)
          fns = 1;
        if (is_space_char(prev_char) && is_space_char(*s)) {
          prev_char = ' ';
          *p_r = ' ';
          s++;
          i++;
          continue;
        }
      }
    } else {
      if (flag == 1) {
        if (fc == 0) {
          fc = 1;
        }
        if (fc == 1) {
          if (fc_len < 1024 - 1) {
            first_comment[fc_len] = !is_space_char(*s) ? *s : ' ';
            fc_len++;
          }
          if (prev_char == '*' && *s == '/') {
            if (fc_len >= 2)
              fc_len -= 2;
            first_comment[fc_len] = 0;
            fc = 2;
          }
        }
      }
      if ((flag == 1 && prev_char == '*' && *s == '/') || (flag == 2 && (*s == '\n' || *s == '\r'))) {
        p_r = flag == 1 ? p_r_t - sizeof(char) : p_r_t;
        prev_char = ' ';
        flag = 0;
        s++;
        i++;
        continue;
      } else if (flag == 3) {
        if (len == i + 1) {
          p_r = p_r_t;
          *p_r++ = '?';
          flag = 0;
          break;
        }
        if (p_r > p_r_t + sizeof(char)) {
          if ((prev_char == '\\' && *s == '\\') || (prev_char == '\\' && *s == qutr_char) || (prev_char == qutr_char && *s == qutr_char)) {
            prev_char = 'X';
            s++;
            i++;
            continue;
          }
        }
        if (*s == qutr_char && (len == i + 1 || *(s + sizeof(char)) != qutr_char)) {
          p_r = p_r_t;
          *p_r++ = '?';
          flag = 0;
          if (i < len)
            s++;
          i++;
          continue;
        }
      } else if (flag == 4) {
        if (p_r_t == p_r) {
          *p_r++ = '?';
          i++;
          continue;
        }
        if (is_token_char(*s) || len == i + 1) {
          if (is_digit_string(p_r_t, p_r)) {
            p_r = p_r_t;
            *p_r++ = '?';
            if (len == i + 1) {
              if (is_token_char(*s))
                *p_r++ = *s;
              i++;
              continue;
            }
          }
          flag = 0;
        }
      }
    }
    *p_r++ = !is_space_char(*s) ? *s : ' ';
    prev_char = *s++;
    i++;
  }
  if (p_r > r) {
    char *e = p_r;
    e--;
    if (*e == ' ') {
      *e = 0;
    }
  }
  *p_r = 0;
  return r;
}
```