user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<MDparseline>:
  endbr64
  movq   $0x0,(%rdx)
  movq   $0x0,(%rcx)
  cmp    %rsi,%rdi
  jae    L119
L234:
  cmpb   $0x20,(%rdi)
  jne    L13
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  jne    L234
  mov    $0x0,%eax
  ret
L119:
  mov    $0x0,%eax
  ret
L13:
  cmp    %rdi,%rsi
  jbe    L30
  movzbl (%rdi),%eax
  cmp    $0xa,%al
  je     L294
  cmp    $0x23,%al
  je     L66
  mov    %rdi,(%rdx)
L75:
  movzbl (%rdi),%eax
  cmp    $0xa,%al
  je     L83
  cmp    $0x3a,%al
  je     L83
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  jne    L75
  mov    %rsi,%rdi
L83:
  mov    $0x0,%eax
  cmpb   $0x3a,(%rdi)
  jne    L203
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  jbe    L187
L168:
  cmpb   $0x20,(%rdi)
  jne    L121
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  jne    L168
  mov    $0x0,%eax
  ret
L294:
  lea    0x1(%rdi),%rax
  ret
L66:
  mov    %rdi,%rax
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  je     L251
  cmpb   $0xa,(%rdi)
  jne    L66
  add    $0x2,%rax
  cmp    %rdi,%rsi
  mov    $0x0,%edx
  cmovbe %rdx,%rax
L203:
  ret
L187:
  ret
L121:
  cmp    %rdi,%rsi
  jbe    L18
L129:
  movzbl (%rdi),%eax
  cmp    $0xa,%al
  je     L97
  cmp    $0x23,%al
  je     L97
  add    $0x1,%rdi
  cmp    %rdi,%rsi
  jne    L129
  mov    $0x0,%eax
  ret
L18:
  mov    $0x0,%eax
  ret
L97:
  cmp    %rdi,%rsi
  jbe    L112
  cmpb   $0xa,(%rdi)
  je     L275
  mov    $0x0,%eax
  cmpb   $0x3a,0x1(%rdi)
  jne    L203
  lea    0x2(%rdi),%rax
  cmp    %rax,%rsi
  jbe    L209
L273:
  cmpb   $0x20,(%rax)
  jne    L242
  add    $0x1,%rax
  cmp    %rax,%rsi
  jne    L273
  mov    $0x0,%eax
  ret
L275:
  lea    0x1(%rdi),%rax
  ret
L209:
  mov    $0x0,%eax
  ret
L242:
  cmp    %rax,%rsi
  jbe    L293
  cmpb   $0xa,(%rax)
  je     L269
  mov    %rax,(%rcx)
L267:
  cmpb   $0xa,(%rax)
  je     L34
  add    $0x1,%rax
  cmp    %rax,%rsi
  jne    L267
  mov    $0x0,%eax
  ret
L269:
  add    $0x1,%rax
  ret
L34:
  cmp    %rax,%rsi
  jbe    L74
  add    $0x1,%rax
  ret
L30:
  mov    $0x0,%eax
  ret
L251:
  mov    $0x0,%eax
  ret
L112:
  mov    $0x0,%eax
  ret
L293:
  mov    $0x0,%eax
  ret
L74:
  mov    $0x0,%eax
  ret
```

assistant: ```c
char *MDparseline(char *line, char *limit, char **targ, char **tool) {
  char *next;
  *targ = 0;
  *tool = 0;
  next = line;
  while (next < limit && *next == ' ') {
    next++;
  };
  if ((next >= limit)) {
    return 0;
  }
  if ((*next == '\n')) {
    return ++next;
  }
  if (*next == '#') {
    while (next < limit && *next != '\n') {
      next++;
    };
    if ((next >= limit)) {
      return 0;
    }
    if ((*next == '\n')) {
      return ++next;
    }
  }
  *targ = next;
  while (next < limit && *next != ':' && *next != '\n') {
    next++;
  };
  if (*next != ':')
    return 0;
  next++;
  while (next < limit && *next == ' ') {
    next++;
  };
  while (next < limit && *next != '#' && *next != '\n') {
    next++;
  };
  if ((next >= limit)) {
    return 0;
  }
  if ((*next == '\n')) {
    return ++next;
  }
  if (*++next != ':')
    return 0;
  next++;
  while (next < limit && *next == ' ') {
    next++;
  };
  if ((next >= limit)) {
    return 0;
  }
  if ((*next == '\n')) {
    return ++next;
  }
  *tool = next;
  while (next < limit && *next != '\n') {
    next++;
  };
  if ((next >= limit)) {
    return 0;
  }
  return ++next;
}
```