user: 下面的汇编指令对应的C源代码是什么：

```asm
<parse_line>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  jmp    L203
L107:
  addq   $0x1,-0x20(%rbp)
L203:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L107
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x9,%al
  je     L107
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L224
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0xa,%al
  je     L224
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x23,%al
  jne    L96
L224:
  mov    $0xffffffff,%eax
  jmp    L256
L96:
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  jmp    L235
L11:
  addq   $0x1,-0x20(%rbp)
L235:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %eax,%eax
  jne    L11
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x5f,%al
  je     L11
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  je     L11
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L270
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x3d,%al
  je     L270
  mov    -0x30(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  jmp    L256
L270:
  mov    -0x20(%rbp),%rax
  sub    -0x18(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <xmalloc@plt>
  cltq
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  mov    %rdx,(%rax)
  mov    -0x30(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x8(%rbp)
  jmp    L76
L108:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x5f,%al
  je     L285
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  je     L285
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  mov    -0x18(%rbp),%rdx
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
  jmp    L69
L285:
  nop
L69:
  addq   $0x1,-0x18(%rbp)
L76:
  mov    -0x18(%rbp),%rax
  cmp    -0x20(%rbp),%rax
  jb     L108
  mov    -0x8(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x30(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <comind@plt>
  cmp    $0xffffffff,%eax
  jne    L40
  mov    -0x30(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  jmp    L256
L174:
  addq   $0x1,-0x20(%rbp)
L40:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L174
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x3d,%al
  je     L12
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  jmp    L256
L12:
  addq   $0x1,-0x20(%rbp)
  jmp    L109
L214:
  addq   $0x1,-0x20(%rbp)
L109:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L214
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  jmp    L110
L275:
  addq   $0x1,-0x10(%rbp)
L110:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L265
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0xa,%al
  jne    L275
L265:
  mov    -0x10(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <strdupdelim@plt>
  cltq
  mov    %rax,%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,(%rax)
  mov    $0x1,%eax
L256:
  leave
  ret
```

assistant: ```c
int parse_line(const char *line, char **com, char **val) {
  const char *p = line;
  const char *orig_comptr, *end;
  char *new_comptr;
  while (*p == ' ' || *p == '\t')
    ++p;
  if (!*p || *p == '\n' || *p == '#')
    return -1;
  for (orig_comptr = p; isalpha((unsigned char)(*p)) || *p == '_' || *p == '-'; p++)
    ;
  if (!isspace((unsigned char)(*p)) && (*p != '=')) {
    free(*com);
    return 0;
  }
  *com = (char *)xmalloc(p - orig_comptr + 1);
  for (new_comptr = *com; orig_comptr < p; orig_comptr++) {
    if (*orig_comptr == '_' || *orig_comptr == '-')
      continue;
    *new_comptr++ = *orig_comptr;
  }
  *new_comptr = '\0';
  if (comind(*com) == -1) {
    free(*com);
    return 0;
  }
  for (; isspace((unsigned char)(*p)); p++)
    ;
  if (*p != '=') {
    free(com);
    return 0;
  }
  for (++p; isspace((unsigned char)(*p)); p++)
    ;
  for (end = p; *end && *end != '\n'; end++)
    ;
  *val = strdupdelim(p, end);
  return 1;
}
```