ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Translate the below assembly code into C programming language:

```asm
<gauged_writer_url_decode>:
  endbr64
  push   %r13
  push   %r12
  mov    %rdx,%r12
  sub    $0x1,%rdx
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  test   %r12,%r12
  jne    L71
  jmp    L5
  nopw   0x0(%rax,%rax,1)
L41:
  cmp    $0x25,%al
  je     L27
L4:
  mov    %rdx,%r12
  mov    %rcx,%rbp
L49:
  add    $0x1,%rbx
  lea    -0x1(%r12),%rdx
  test   %r12,%r12
  je     L5
L71:
  movzbl 0x0(%rbp),%eax
  lea    0x1(%rbp),%rcx
  mov    %al,(%rbx)
  test   %al,%al
  je     L5
  cmp    $0x2b,%al
  jne    L41
  mov    %rdx,%r12
  movb   $0x20,(%rbx)
  mov    %rcx,%rbp
  add    $0x1,%rbx
  lea    -0x1(%r12),%rdx
  test   %r12,%r12
  jne    L71
L5:
  movb   $0x0,(%rbx)
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L27:
  movsbl 0x1(%rbp),%edi
  test   %dil,%dil
  je     L4
  cmpb   $0x0,0x2(%rbp)
  je     L4
  cmp    $0x1,%rdx
  jbe    L4
  call   <gauged_writer_hex_decode@plt>
  movsbl 0x2(%rbp),%edi
  sub    $0x3,%r12
  add    $0x3,%rbp
  mov    %eax,%r13d
  call   <gauged_writer_hex_decode@plt>
  shl    $0x4,%r13d
  or     %eax,%r13d
  mov    %r13b,(%rbx)
  jmp    L49
```

assistant: ```c
void gauged_writer_url_decode(char *dst, const char *src, size_t len) {
  while (len-- && (*dst = *src++)) {
    if (*dst == '+') {
      *dst = ' ';
    } else if (*dst == '%' && src[0] && src[1] && len >= 2) {
      *dst = (gauged_writer_hex_decode(src[0]) << 4) | gauged_writer_hex_decode(src[1]);
      src += 2;
      len -= 2;
    }
    dst++;
  }
  *dst = '\0';
}
```
user: Translate the below assembly code into C programming language:

```asm
<gauged_writer_url_decode>:
  endbr64
  push   %r13
  push   %r12
  mov    %rdx,%r12
  sub    $0x1,%rdx
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  test   %r12,%r12
  jne    L70
  jmp    L19
  nopw   0x0(%rax,%rax,1)
L71:
  cmp    $0x25,%al
  je     L10
L93:
  mov    %rdx,%r12
  mov    %rcx,%rbp
L87:
  add    $0x1,%rbx
  lea    -0x1(%r12),%rdx
  test   %r12,%r12
  je     L19
L70:
  movzbl 0x0(%rbp),%eax
  lea    0x1(%rbp),%rcx
  mov    %al,(%rbx)
  test   %al,%al
  je     L19
  cmp    $0x2b,%al
  jne    L71
  mov    %rdx,%r12
  movb   $0x20,(%rbx)
  mov    %rcx,%rbp
  add    $0x1,%rbx
  lea    -0x1(%r12),%rdx
  test   %r12,%r12
  jne    L70
L19:
  movb   $0x0,(%rbx)
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L10:
  movsbl 0x1(%rbp),%edi
  test   %dil,%dil
  je     L93
  cmpb   $0x0,0x2(%rbp)
  je     L93
  cmp    $0x1,%rdx
  jbe    L93
  call   <gauged_writer_hex_decode@plt>
  movsbl 0x2(%rbp),%edi
  sub    $0x3,%r12
  add    $0x3,%rbp
  mov    %eax,%r13d
  call   <gauged_writer_hex_decode@plt>
  shl    $0x4,%r13d
  or     %eax,%r13d
  mov    %r13b,(%rbx)
  jmp    L87
```

assistant: ```c
void gauged_writer_url_decode(char *dst, const char *src, size_t len) {
  while (len-- && (*dst = *src++)) {
    if (*dst == '+') {
      *dst = ' ';
    } else if (*dst == '%' && src[0] && src[1] && len >= 2) {
      *dst = (gauged_writer_hex_decode(src[0]) << 4) | gauged_writer_hex_decode(src[1]);
      src += 2;
      len -= 2;
    }
    dst++;
  }
  *dst = '\0';
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<dt_char_skip_until>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    %edx,%eax
  mov    %al,-0x14(%rbp)
  movzbl -0x14(%rbp),%edx
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    -0x10(%rbp),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <dt_char_span_until@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,(%rax)
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
size_t dt_char_skip_until(const unsigned char **src, size_t len, unsigned char mask) {
  *src += len = dt_char_span_until(*src, len, mask);
  return len;
}
```
user: Translate the below assembly code into C programming language:

```asm
<dt_char_skip_until>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  movzbl %dl,%edx
  mov    (%rdi),%rdi
  call   <dt_char_span_until@plt>
  add    %rax,(%rbx)
  pop    %rbx
  ret
```

assistant: ```c
size_t dt_char_skip_until(const unsigned char **src, size_t len, unsigned char mask) {
  *src += len = dt_char_span_until(*src, len, mask);
  return len;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<dt_char_skip_until>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  mov    (%rdi),%rdi
  movzbl %dl,%edx
  call   <dt_char_span_until@plt>
  add    %rax,(%rbx)
  pop    %rbx
  ret
```

assistant: ```c
size_t dt_char_skip_until(const unsigned char **src, size_t len, unsigned char mask) {
  *src += len = dt_char_span_until(*src, len, mask);
  return len;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<dt_char_skip_until>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  mov    (%rdi),%rdi
  movzbl %dl,%edx
  call   <dt_char_span_until@plt>
  add    %rax,(%rbx)
  pop    %rbx
  ret
```

assistant: ```c
size_t dt_char_skip_until(const unsigned char **src, size_t len, unsigned char mask) {
  *src += len = dt_char_span_until(*src, len, mask);
  return len;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %edi,-0x4(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    $0x0,%eax
  call   <getpid@plt>
  mov    %eax,%edi
  call   <print_num@plt>
  mov    $0x0,%eax
  leave
  ret
```

assistant: ```c
int main(int argc, const char *argv[]) {
  print_num(getpid());
  return (0);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  mov    $0x0,%eax
  call   <getpid@plt>
  mov    %eax,%edi
  call   <print_num@plt>
  mov    $0x0,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, const char *argv[]) {
  print_num(getpid());
  return (0);
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  xor    %eax,%eax
  call   <getpid@plt>
  mov    %eax,%edi
  call   <print_num@plt>
  xor    %eax,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, const char *argv[]) {
  print_num(getpid());
  return (0);
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  xor    %eax,%eax
  call   <getpid@plt>
  mov    %eax,%edi
  call   <print_num@plt>
  xor    %eax,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, const char *argv[]) {
  print_num(getpid());
  return (0);
}
```
user: What is the c source code of the assembly code below:

```asm
<frontend_locked>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %edi,-0x14(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    D19(%rip),%rax
  mov    (%rax),%ecx
  lea    -0xc(%rbp),%rdx
  mov    -0x14(%rbp),%eax
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <ioctl@plt>
  cmp    $0xffffffff,%eax
  jne    L12
  mov    $0xffffffff,%eax
  jmp    L31
L12:
  mov    -0xc(%rbp),%edx
  mov    D17(%rip),%rax
  mov    (%rax),%eax
  and    %edx,%eax
  test   %eax,%eax
  je     L35
  mov    $0x0,%eax
  jmp    L31
L35:
  mov    $0x1,%eax
L31:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L40
  call   <__stack_chk_fail@plt>
L40:
  leave
  ret
```

assistant: ```c
int frontend_locked(int fefd) {
  unsigned int status;
  if (ioctl(fefd, FE_READ_STATUS, &status) == -1) {
    return -1;
  }
  if (status & FE_HAS_LOCK) {
    return 0;
  }
  return 1;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<frontend_locked>:
  endbr64
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rdx
  mov    D9(%rip),%rax
  mov    (%rax),%esi
  call   <ioctl@plt>
  cmp    $0xffffffff,%eax
  je     L13
  mov    D17(%rip),%rdx
  mov    0x4(%rsp),%eax
  and    (%rdx),%eax
  sete   %al
  movzbl %al,%eax
L13:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L14
  add    $0x18,%rsp
  ret
L14:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int frontend_locked(int fefd) {
  unsigned int status;
  if (ioctl(fefd, FE_READ_STATUS, &status) == -1) {
    return -1;
  }
  if (status & FE_HAS_LOCK) {
    return 0;
  }
  return 1;
}
```
user: Translate the below assembly code into C programming language:

```asm
<frontend_locked>:
  endbr64
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    D14(%rip),%rax
  lea    0x4(%rsp),%rdx
  mov    (%rax),%esi
  call   <ioctl@plt>
  cmp    $0xffffffff,%eax
  je     L16
  mov    D3(%rip),%rdx
  mov    0x4(%rsp),%eax
  and    (%rdx),%eax
  sete   %al
  movzbl %al,%eax
L16:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L2
  add    $0x18,%rsp
  ret
L2:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int frontend_locked(int fefd) {
  unsigned int status;
  if (ioctl(fefd, FE_READ_STATUS, &status) == -1) {
    return -1;
  }
  if (status & FE_HAS_LOCK) {
    return 0;
  }
  return 1;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<frontend_locked>:
  endbr64
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    D6(%rip),%rax
  lea    0x4(%rsp),%rdx
  mov    (%rax),%esi
  call   <ioctl@plt>
  cmp    $0xffffffff,%eax
  je     L5
  mov    D3(%rip),%rdx
  mov    0x4(%rsp),%eax
  and    (%rdx),%eax
  sete   %al
  movzbl %al,%eax
L5:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L1
  add    $0x18,%rsp
  ret
L1:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int frontend_locked(int fefd) {
  unsigned int status;
  if (ioctl(fefd, FE_READ_STATUS, &status) == -1) {
    return -1;
  }
  if (status & FE_HAS_LOCK) {
    return 0;
  }
  return 1;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<Fmt_fmt>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xe0,%rsp
  mov    %rdi,-0xc8(%rbp)
  mov    %rsi,-0xd0(%rbp)
  mov    %rdx,-0xd8(%rbp)
  mov    %rcx,-0x98(%rbp)
  mov    %r8,-0x90(%rbp)
  mov    %r9,-0x88(%rbp)
  test   %al,%al
  je     L5
  movaps %xmm0,-0x80(%rbp)
  movaps %xmm1,-0x70(%rbp)
  movaps %xmm2,-0x60(%rbp)
  movaps %xmm3,-0x50(%rbp)
  movaps %xmm4,-0x40(%rbp)
  movaps %xmm5,-0x30(%rbp)
  movaps %xmm6,-0x20(%rbp)
  movaps %xmm7,-0x10(%rbp)
L5:
  mov    -0xd8(%rbp),%rdx
  mov    -0xb4(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <va_start@plt>
  mov    -0xb4(%rbp),%ecx
  mov    -0xd8(%rbp),%rdx
  mov    -0xd0(%rbp),%rsi
  mov    -0xc8(%rbp),%rax
  mov    %rax,%rdi
  call   <Fmt_vfmt@plt>
  mov    -0xb4(%rbp),%eax
  mov    %eax,%edi
  call   <va_end@plt>
  nop
  leave
  ret
```

assistant: ```c
void Fmt_fmt(int put(int c, void *), void *cl, const char *fmt, ...) {
  va_list ap;
  va_start(ap, fmt);
  Fmt_vfmt(put, cl, fmt, ap);
  va_end(ap);
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<Fmt_fmt>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%r12
  mov    %rsi,%r13
  mov    %rdx,%rbx
  mov    %rdx,%rsi
  mov    $0x0,%ebp
  mov    %ebp,%edi
  call   <va_start@plt>
  mov    %ebp,%ecx
  mov    %rbx,%rdx
  mov    %r13,%rsi
  mov    %r12,%rdi
  call   <Fmt_vfmt@plt>
  mov    %ebp,%edi
  call   <va_end@plt>
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
void Fmt_fmt(int put(int c, void *), void *cl, const char *fmt, ...) {
  va_list ap;
  va_start(ap, fmt);
  Fmt_vfmt(put, cl, fmt, ap);
  va_end(ap);
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<Fmt_fmt>:
  endbr64
  push   %r14
  mov    %rsi,%r14
  mov    %rdx,%rsi
  push   %r13
  mov    %rdi,%r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  xor    %ebp,%ebp
  mov    %ebp,%edi
  sub    $0x8,%rsp
  call   <va_start@plt>
  mov    %ebp,%ecx
  mov    %r12,%rdx
  mov    %r14,%rsi
  mov    %r13,%rdi
  call   <Fmt_vfmt@plt>
  mov    %ebp,%edi
  call   <va_end@plt>
  add    $0x8,%rsp
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

assistant: ```c
void Fmt_fmt(int put(int c, void *), void *cl, const char *fmt, ...) {
  va_list ap;
  va_start(ap, fmt);
  Fmt_vfmt(put, cl, fmt, ap);
  va_end(ap);
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<Fmt_fmt>:
  endbr64
  push   %r14
  mov    %rsi,%r14
  mov    %rdx,%rsi
  push   %r13
  mov    %rdi,%r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  xor    %ebp,%ebp
  mov    %ebp,%edi
  sub    $0x8,%rsp
  call   <va_start@plt>
  mov    %ebp,%ecx
  mov    %r12,%rdx
  mov    %r14,%rsi
  mov    %r13,%rdi
  call   <Fmt_vfmt@plt>
  mov    %ebp,%edi
  call   <va_end@plt>
  add    $0x8,%rsp
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

assistant: ```c
void Fmt_fmt(int put(int c, void *), void *cl, const char *fmt, ...) {
  va_list ap;
  va_start(ap, fmt);
  Fmt_vfmt(put, cl, fmt, ap);
  va_end(ap);
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<lineread>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    %edx,-0x14(%rbp)
  mov    -0x8(%rbp),%rdx
  mov    -0x14(%rbp),%ecx
  mov    -0x10(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <feof@plt>
  test   %eax,%eax
  jne    L1
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  jmp    L19
L1:
  mov    $0x0,%eax
L19:
  leave
  ret
```

assistant: ```c
int lineread(FILE *stream, char *buf, int count) {
  fgets(buf, count, stream);
  if (!feof(stream))
    return (strlen(buf));
  else
    return (0);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<lineread>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %edx,%esi
  mov    %rdi,%rdx
  mov    %rbp,%rdi
  call   <fgets@plt>
  mov    %rbx,%rdi
  call   <feof@plt>
  mov    %eax,%edx
  mov    $0x0,%eax
  test   %edx,%edx
  je     L3
L8:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
L3:
  mov    %rbp,%rdi
  call   <strlen@plt>
  jmp    L8
```

assistant: ```c
int lineread(FILE *stream, char *buf, int count) {
  fgets(buf, count, stream);
  if (!feof(stream))
    return (strlen(buf));
  else
    return (0);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<lineread>:
  endbr64
  push   %r12
  mov    %rsi,%r12
  mov    %edx,%esi
  mov    %rdi,%rdx
  push   %rbp
  mov    %rdi,%rbp
  mov    %r12,%rdi
  sub    $0x8,%rsp
  call   <fgets@plt>
  mov    %rbp,%rdi
  call   <feof@plt>
  test   %eax,%eax
  je     L5
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax)
L5:
  add    $0x8,%rsp
  mov    %r12,%rdi
  pop    %rbp
  pop    %r12
  jmp    1070 <strlen@plt>
```

assistant: ```c
int lineread(FILE *stream, char *buf, int count) {
  fgets(buf, count, stream);
  if (!feof(stream))
    return (strlen(buf));
  else
    return (0);
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<lineread>:
  endbr64
  push   %r12
  mov    %rsi,%r12
  mov    %edx,%esi
  mov    %rdi,%rdx
  push   %rbp
  mov    %rdi,%rbp
  mov    %r12,%rdi
  sub    $0x8,%rsp
  call   <fgets@plt>
  mov    %rbp,%rdi
  call   <feof@plt>
  test   %eax,%eax
  je     L4
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax)
L4:
  add    $0x8,%rsp
  mov    %r12,%rdi
  pop    %rbp
  pop    %r12
  jmp    1070 <strlen@plt>
```

assistant: ```c
int lineread(FILE *stream, char *buf, int count) {
  fgets(buf, count, stream);
  if (!feof(stream))
    return (strlen(buf));
  else
    return (0);
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<getlittleline>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  lea    -0xf4000(%rsp),%r11
L69:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L69
  sub    $0x270,%rsp
  mov    %rdi,-0xf4268(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0xf4258(%rbp)
  jmp    L6
L110:
  mov    -0xf425c(%rbp),%eax
  mov    %eax,%edx
  mov    -0xf4258(%rbp),%eax
  cltq
  mov    %dl,-0xf4250(%rbp,%rax,1)
  addl   $0x1,-0xf4258(%rbp)
L6:
  cmpl   $0xf423e,-0xf4258(%rbp)
  jg     L11
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    %eax,-0xf425c(%rbp)
  mov    D5(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0xf425c(%rbp)
  je     L11
  cmpl   $0xa,-0xf425c(%rbp)
  jne    L110
L11:
  cmpl   $0x0,-0xf4258(%rbp)
  jne    L88
  mov    $0x0,%eax
  jmp    L23
L88:
  cmpl   $0xa,-0xf425c(%rbp)
  jne    L96
  subl   $0x1,-0xf4258(%rbp)
L96:
  mov    -0xf4258(%rbp),%eax
  mov    %eax,-0xf4254(%rbp)
  jmp    L3
L4:
  mov    -0xf4254(%rbp),%eax
  sub    -0xf4258(%rbp),%eax
  movslq %eax,%rdx
  mov    -0xf4268(%rbp),%rax
  add    %rax,%rdx
  mov    -0xf4258(%rbp),%eax
  cltq
  movzbl -0xf4250(%rbp,%rax,1),%eax
  mov    %al,(%rdx)
  subl   $0x1,-0xf4258(%rbp)
L3:
  cmpl   $0x0,-0xf4258(%rbp)
  jns    L4
  cmpl   $0x0,-0xf4254(%rbp)
  jle    L18
  cmpl   $0xa,-0xf425c(%rbp)
  jne    L53
  addl   $0x1,-0xf4254(%rbp)
  mov    -0xf4254(%rbp),%eax
  movslq %eax,%rdx
  mov    -0xf4268(%rbp),%rax
  add    %rdx,%rax
  movb   $0xa,(%rax)
L53:
  addl   $0x1,-0xf4254(%rbp)
  mov    -0xf4254(%rbp),%eax
  movslq %eax,%rdx
  mov    -0xf4268(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
L18:
  mov    -0xf4254(%rbp),%eax
L23:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L29
  call   <__stack_chk_fail@plt>
L29:
  leave
  ret
```

assistant: ```c
int getlittleline(char line[]) {
  int lastchar, idx;
  char readline[1000000];
  for (idx = 0; idx < 1000000 - 1 && (lastchar = getchar()) != EOF && lastchar != '\n'; idx++)
    readline[idx] = lastchar;
  if (idx == 0) {
    return 0;
  }
  if (lastchar == '\n') {
    idx--;
  }
  int len = idx;
  for (; idx >= 0; idx--)
    line[len - idx] = readline[idx];
  if (len > 0) {
    if (lastchar == '\n') {
      line[++len] = '\n';
    }
    line[++len] = '\0';
  }
  return len;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<getlittleline>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0xf4000(%rsp),%r11
L18:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L18
  sub    $0x250,%rsp
  mov    %rdi,%r12
  mov    %fs:0x28,%rax
  mov    %rax,0xf4248(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  mov    $0x0,%ebx
L38:
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    D8(%rip),%rdx
  cmp    %eax,(%rdx)
  je     L1
  cmp    $0xa,%eax
  je     L1
  mov    %al,0x0(%rbp)
  add    $0x1,%ebx
  add    $0x1,%rbp
  cmp    $0xf423f,%ebx
  jne    L38
  jmp    L112
L1:
  test   %ebx,%ebx
  je     L24
  cmp    $0xa,%eax
  sete   %dl
  movzbl %dl,%edx
  sub    %edx,%ebx
L112:
  test   %ebx,%ebx
  js     L40
  movslq %ebx,%rdx
  lea    (%rsp,%rdx,1),%rcx
  mov    %r12,%rdx
  mov    %ebx,%esi
  lea    0x1(%r12,%rsi,1),%rdi
L7:
  movzbl (%rcx),%esi
  mov    %sil,(%rdx)
  sub    $0x1,%rcx
  add    $0x1,%rdx
  cmp    %rdi,%rdx
  jne    L7
L40:
  test   %ebx,%ebx
  jle    L24
  cmp    $0xa,%eax
  je     L83
L117:
  add    $0x1,%ebx
  movslq %ebx,%rax
  movb   $0x0,(%r12,%rax,1)
L24:
  mov    0xf4248(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L109
  mov    %ebx,%eax
  add    $0xf4250,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L83:
  add    $0x1,%ebx
  movslq %ebx,%rax
  movb   $0xa,(%r12,%rax,1)
  jmp    L117
L109:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int getlittleline(char line[]) {
  int lastchar, idx;
  char readline[1000000];
  for (idx = 0; idx < 1000000 - 1 && (lastchar = getchar()) != EOF && lastchar != '\n'; idx++)
    readline[idx] = lastchar;
  if (idx == 0) {
    return 0;
  }
  if (lastchar == '\n') {
    idx--;
  }
  int len = idx;
  for (; idx >= 0; idx--)
    line[len - idx] = readline[idx];
  if (len > 0) {
    if (lastchar == '\n') {
      line[++len] = '\n';
    }
    line[++len] = '\0';
  }
  return len;
}
```
user: What is the c source code of the assembly code below?

```asm
<getlittleline>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0xf4000(%rsp),%r11
L65:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L65
  sub    $0x258,%rsp
  mov    D7(%rip),%r13
  xor    %ebx,%ebx
  mov    %fs:0x28,%rax
  mov    %rax,0xf4248(%rsp)
  xor    %eax,%eax
  mov    %rdi,%r12
  jmp    L72
  nopl   0x0(%rax,%rax,1)
L142:
  cmp    $0xa,%eax
  je     L113
  mov    %al,(%rsp,%rbx,1)
  add    $0x1,%rbx
  mov    %rsp,%rdx
  cmp    $0xf423f,%rbx
  je     L100
L72:
  xor    %eax,%eax
  mov    %ebx,%ebp
  call   <getchar@plt>
  cmp    %eax,0x0(%r13)
  jne    L142
  test   %ebx,%ebx
  je     L3
  cmp    $0xa,%eax
  je     L29
L32:
  mov    %rsp,%rdx
L93:
  movslq %ebp,%rsi
  mov    %r12,%rcx
  add    %rsi,%rdx
  lea    0x1(%r12,%rsi,1),%rdi
  nopl   0x0(%rax)
L87:
  movzbl (%rdx),%esi
  add    $0x1,%rcx
  sub    $0x1,%rdx
  mov    %sil,-0x1(%rcx)
  cmp    %rdi,%rcx
  jne    L87
  test   %ebp,%ebp
  je     L3
  cmp    $0xa,%eax
  jne    L63
  add    $0x1,%ebp
  movslq %ebp,%rax
  movb   $0xa,(%r12,%rax,1)
L63:
  lea    0x1(%rbp),%eax
  movslq %eax,%rdx
  movb   $0x0,(%r12,%rdx,1)
L37:
  mov    0xf4248(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L41
  add    $0xf4258,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L3:
  xor    %eax,%eax
  jmp    L37
  nopl   0x0(%rax)
L113:
  test   %ebx,%ebx
  je     L3
L29:
  sub    $0x1,%ebp
  mov    $0xa,%eax
  jmp    L32
L100:
  mov    $0xf423f,%ebp
  jmp    L93
L41:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int getlittleline(char line[]) {
  int lastchar, idx;
  char readline[1000000];
  for (idx = 0; idx < 1000000 - 1 && (lastchar = getchar()) != EOF && lastchar != '\n'; idx++)
    readline[idx] = lastchar;
  if (idx == 0) {
    return 0;
  }
  if (lastchar == '\n') {
    idx--;
  }
  int len = idx;
  for (; idx >= 0; idx--)
    line[len - idx] = readline[idx];
  if (len > 0) {
    if (lastchar == '\n') {
      line[++len] = '\n';
    }
    line[++len] = '\0';
  }
  return len;
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<getlittleline>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0xf4000(%rsp),%r11
L52:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L52
  sub    $0x258,%rsp
  mov    D4(%rip),%r13
  xor    %ebx,%ebx
  mov    %fs:0x28,%rax
  mov    %rax,0xf4248(%rsp)
  xor    %eax,%eax
  mov    %rdi,%r12
  jmp    L11
  nopl   0x0(%rax,%rax,1)
L55:
  cmp    $0xa,%eax
  je     L53
  mov    %al,(%rsp,%rbx,1)
  add    $0x1,%rbx
  mov    %rsp,%rdx
  cmp    $0xf423f,%rbx
  je     L110
L11:
  xor    %eax,%eax
  mov    %ebx,%ebp
  call   <getchar@plt>
  cmp    %eax,0x0(%r13)
  jne    L55
  test   %ebx,%ebx
  je     L21
  cmp    $0xa,%eax
  je     L121
L128:
  mov    %rsp,%rdx
L142:
  movslq %ebp,%rsi
  mov    %r12,%rcx
  add    %rsi,%rdx
  lea    0x1(%r12,%rsi,1),%rdi
  nopl   0x0(%rax)
L91:
  movzbl (%rdx),%esi
  add    $0x1,%rcx
  sub    $0x1,%rdx
  mov    %sil,-0x1(%rcx)
  cmp    %rdi,%rcx
  jne    L91
  test   %ebp,%ebp
  je     L21
  cmp    $0xa,%eax
  jne    L78
  add    $0x1,%ebp
  movslq %ebp,%rax
  movb   $0xa,(%r12,%rax,1)
L78:
  lea    0x1(%rbp),%eax
  movslq %eax,%rdx
  movb   $0x0,(%r12,%rdx,1)
L85:
  mov    0xf4248(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L96
  add    $0xf4258,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L21:
  xor    %eax,%eax
  jmp    L85
  nopl   0x0(%rax)
L53:
  test   %ebx,%ebx
  je     L21
L121:
  sub    $0x1,%ebp
  mov    $0xa,%eax
  jmp    L128
L110:
  mov    $0xf423f,%ebp
  jmp    L142
L96:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int getlittleline(char line[]) {
  int lastchar, idx;
  char readline[1000000];
  for (idx = 0; idx < 1000000 - 1 && (lastchar = getchar()) != EOF && lastchar != '\n'; idx++)
    readline[idx] = lastchar;
  if (idx == 0) {
    return 0;
  }
  if (lastchar == '\n') {
    idx--;
  }
  int len = idx;
  for (; idx >= 0; idx--)
    line[len - idx] = readline[idx];
  if (len > 0) {
    if (lastchar == '\n') {
      line[++len] = '\n';
    }
    line[++len] = '\0';
  }
  return len;
}
```