ylfeng/ReF-Decompile-dataset huggingface dataset:
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<ps>:
  endbr64
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xd0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xc8(%rsp)
  xor    %eax,%eax
  lea    D23(%rip),%rdi
  call   <printString@plt>
  mov    %rsp,%rsi
  lea    0x40(%rsp),%rdi
  call   <ps_sys@plt>
  cmpl   $0x0,(%rsp)
  je     L0
  lea    0x40(%rsp),%rbp
  lea    0x4(%rsp),%rbx
  lea    D7(%rip),%r14
  lea    D14(%rip),%r13
L19:
  mov    0x0(%rbp),%rdi
  call   <printString@plt>
  mov    %r14,%rdi
  call   <printString@plt>
  mov    %rbx,%r12
  mov    -0x4(%rbx),%edi
  call   <printDec@plt>
  mov    %r13,%rdi
  call   <printString@plt>
  add    $0x8,%rbp
  add    $0x4,%rbx
  cmpl   $0x0,(%r12)
  jne    L19
L0:
  mov    0xc8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L15
  add    $0xd0,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L15:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D23
type_infered: string
name: disassemble_data
arguments: tag: D7
type_infered: string
name: disassemble_data
arguments: tag: D14
type_infered: string

tool: D23: PIDs


tool: D7:  - 

tool: D14: 


assistant: ```c
void ps() {
  unsigned int processPID[16];
  char *names[16];
  printString("PIDs\n");
  ps_sys(names, processPID);
  int i = 0;
  while (processPID[i] != 0) {
    printString(names[i]);
    printString(" - ");
    printDec(processPID[i]);
    printString("\n");
    i++;
  }
  return;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<ps>:
  endbr64
  push   %r14
  lea    D16(%rip),%rdi
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xd0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xc8(%rsp)
  xor    %eax,%eax
  lea    0x40(%rsp),%rbp
  call   <printString@plt>
  mov    %rsp,%rsi
  mov    %rbp,%rdi
  call   <ps_sys@plt>
  mov    (%rsp),%edx
  test   %edx,%edx
  je     L13
  lea    0x4(%rsp),%rbx
  lea    D5(%rip),%r14
  lea    D25(%rip),%r13
  nopl   0x0(%rax)
L16:
  mov    0x0(%rbp),%rdi
  mov    %rbx,%r12
  add    $0x8,%rbp
  add    $0x4,%rbx
  call   <printString@plt>
  mov    %r14,%rdi
  call   <printString@plt>
  mov    -0x8(%rbx),%edi
  call   <printDec@plt>
  mov    %r13,%rdi
  call   <printString@plt>
  mov    (%r12),%eax
  test   %eax,%eax
  jne    L16
L13:
  mov    0xc8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L22
  add    $0xd0,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L22:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D16
type: string
name: retrieve_data
arguments: data_tag: D5
type: string
name: retrieve_data
arguments: data_tag: D25
type: string

tool: D16: PIDs


tool: D5:  - 

tool: D25: 


assistant: ```c
void ps() {
  unsigned int processPID[16];
  char *names[16];
  printString("PIDs\n");
  ps_sys(names, processPID);
  int i = 0;
  while (processPID[i] != 0) {
    printString(names[i]);
    printString(" - ");
    printDec(processPID[i]);
    printString("\n");
    i++;
  }
  return;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<ps>:
  endbr64
  push   %r14
  lea    D14(%rip),%rdi
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xd0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xc8(%rsp)
  xor    %eax,%eax
  lea    0x40(%rsp),%rbp
  call   <printString@plt>
  mov    %rsp,%rsi
  mov    %rbp,%rdi
  call   <ps_sys@plt>
  mov    (%rsp),%edx
  test   %edx,%edx
  je     L19
  lea    0x4(%rsp),%rbx
  lea    D3(%rip),%r14
  lea    D10(%rip),%r13
  nopl   0x0(%rax)
L12:
  mov    0x0(%rbp),%rdi
  mov    %rbx,%r12
  add    $0x8,%rbp
  add    $0x4,%rbx
  call   <printString@plt>
  mov    %r14,%rdi
  call   <printString@plt>
  mov    -0x8(%rbx),%edi
  call   <printDec@plt>
  mov    %r13,%rdi
  call   <printString@plt>
  mov    (%r12),%eax
  test   %eax,%eax
  jne    L12
L19:
  mov    0xc8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L10
  add    $0xd0,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L10:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D14
datatype: string
name: retrieve_data
arguments: data_tag: D3
datatype: string
name: retrieve_data
arguments: data_tag: D10
datatype: string

tool: D14: PIDs


tool: D3:  - 

tool: D10: 


assistant: ```c
void ps() {
  unsigned int processPID[16];
  char *names[16];
  printString("PIDs\n");
  ps_sys(names, processPID);
  int i = 0;
  while (processPID[i] != 0) {
    printString(names[i]);
    printString(" - ");
    printDec(processPID[i]);
    printString("\n");
    i++;
  }
  return;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x100,-0x14(%rbp)
  movsd  D75(%rip),%xmm0
  movsd  %xmm0,-0x10(%rbp)
  lea    D64(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    -0x1c(%rbp),%rax
  mov    %rax,%rsi
  lea    D74(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    -0x1c(%rbp),%eax
  mov    -0x14(%rbp),%edx
  mov    %eax,%esi
  lea    D54(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D34(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    -0x18(%rbp),%rdx
  lea    -0x1c(%rbp),%rax
  mov    %rax,%rsi
  lea    D44(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    -0x18(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  mov    -0x10(%rbp),%rcx
  movq   %rcx,%xmm0
  mov    %eax,%esi
  lea    D3(%rip),%rax
  mov    %rax,%rdi
  mov    $0x1,%eax
  call   <printf@plt>
  lea    D51(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L2
  call   <__stack_chk_fail@plt>
L2:
  leave
  ret
```

tool_calls: name: read_data
arguments: label: D75
type_guessed: f64
name: read_data
arguments: label: D64
type_guessed: string
name: read_data
arguments: label: D74
type_guessed: string
name: read_data
arguments: label: D54
type_guessed: string
name: read_data
arguments: label: D34
type_guessed: string
name: read_data
arguments: label: D44
type_guessed: string
name: read_data
arguments: label: D3
type_guessed: string
name: read_data
arguments: label: D51
type_guessed: string

tool: D75: 242.5

tool: D64: Enter a field width: 

tool: D74: %d

tool: D54: The number is :%*d:


tool: D34: Now enter a width and a precision: 

tool: D44: %d %d

tool: D3: Weight = %*.*f


tool: D51: Done!

assistant: ```c
int main(void) {
  unsigned width, precision;
  int number = 256;
  double weight = 242.5;
  printf("Enter a field width: \n");
  scanf("%d", &width);
  printf("The number is :%*d:\n", width, number);
  printf("Now enter a width and a precision: \n");
  scanf("%d %d", &width, &precision);
  printf("Weight = %*.*f\n", width, precision, weight);
  printf("Done!\n");
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    D38(%rip),%rdi
  call   <puts@plt>
  mov    %rsp,%rbx
  mov    %rbx,%rsi
  lea    D66(%rip),%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    $0x100,%edx
  mov    (%rsp),%esi
  lea    D19(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D64(%rip),%rdi
  call   <puts@plt>
  lea    0x4(%rsp),%rdx
  mov    %rbx,%rsi
  lea    D72(%rip),%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  movsd  D31(%rip),%xmm0
  mov    0x4(%rsp),%edx
  mov    (%rsp),%esi
  lea    D51(%rip),%rdi
  mov    $0x1,%eax
  call   <printf@plt>
  lea    D22(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  mov    $0x0,%eax
  add    $0x10,%rsp
  pop    %rbx
  ret
L5:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D38
data_type: string
name: unpack_data
arguments: data_tag: D66
data_type: string
name: unpack_data
arguments: data_tag: D19
data_type: string
name: unpack_data
arguments: data_tag: D64
data_type: string
name: unpack_data
arguments: data_tag: D72
data_type: string
name: unpack_data
arguments: data_tag: D31
data_type: f64
name: unpack_data
arguments: data_tag: D51
data_type: string
name: unpack_data
arguments: data_tag: D22
data_type: string

tool: D38: Enter a field width: 

tool: D66: %d

tool: D19: The number is :%*d:


tool: D64: Now enter a width and a precision: 

tool: D72: %d %d

tool: D31: 242.5

tool: D51: Weight = %*.*f


tool: D22: Done!

assistant: ```c
int main(void) {
  unsigned width, precision;
  int number = 256;
  double weight = 242.5;
  printf("Enter a field width: \n");
  scanf("%d", &width);
  printf("The number is :%*d:\n", width, number);
  printf("Now enter a width and a precision: \n");
  scanf("%d %d", &width, &precision);
  printf("Weight = %*.*f\n", width, precision, weight);
  printf("Done!\n");
  return 0;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<main>:
  endbr64
  push   %rbp
  lea    D5(%rip),%rdi
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  call   <puts@plt>
  mov    %rbp,%rsi
  lea    D20(%rip),%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  mov    (%rsp),%esi
  mov    $0x100,%edx
  xor    %eax,%eax
  lea    D31(%rip),%rdi
  call   <printf@plt>
  lea    D11(%rip),%rdi
  call   <puts@plt>
  lea    0x4(%rsp),%rdx
  mov    %rbp,%rsi
  xor    %eax,%eax
  lea    D52(%rip),%rdi
  call   <scanf@plt>
  movsd  D23(%rip),%xmm0
  mov    0x4(%rsp),%edx
  lea    D50(%rip),%rdi
  mov    (%rsp),%esi
  mov    $0x1,%eax
  call   <printf@plt>
  lea    D79(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  add    $0x10,%rsp
  xor    %eax,%eax
  pop    %rbp
  ret
L5:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: label: D5
type_guessed: string
name: extract_symbolic_data
arguments: label: D20
type_guessed: string
name: extract_symbolic_data
arguments: label: D31
type_guessed: string
name: extract_symbolic_data
arguments: label: D11
type_guessed: string
name: extract_symbolic_data
arguments: label: D52
type_guessed: string
name: extract_symbolic_data
arguments: label: D23
type_guessed: f64
name: extract_symbolic_data
arguments: label: D50
type_guessed: string
name: extract_symbolic_data
arguments: label: D79
type_guessed: string

tool: D5: Enter a field width: 

tool: D20: %d

tool: D31: The number is :%*d:


tool: D11: Now enter a width and a precision: 

tool: D52: %d %d

tool: D23: 242.5

tool: D50: Weight = %*.*f


tool: D79: Done!

assistant: ```c
int main(void) {
  unsigned width, precision;
  int number = 256;
  double weight = 242.5;
  printf("Enter a field width: \n");
  scanf("%d", &width);
  printf("The number is :%*d:\n", width, number);
  printf("Now enter a width and a precision: \n");
  scanf("%d %d", &width, &precision);
  printf("Weight = %*.*f\n", width, precision, weight);
  printf("Done!\n");
  return 0;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  push   %rbp
  lea    D30(%rip),%rdi
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  call   <puts@plt>
  mov    %rbp,%rsi
  lea    D51(%rip),%rdi
  xor    %eax,%eax
  call   <scanf@plt>
  mov    (%rsp),%esi
  mov    $0x100,%edx
  xor    %eax,%eax
  lea    D63(%rip),%rdi
  call   <printf@plt>
  lea    D58(%rip),%rdi
  call   <puts@plt>
  lea    0x4(%rsp),%rdx
  mov    %rbp,%rsi
  xor    %eax,%eax
  lea    D20(%rip),%rdi
  call   <scanf@plt>
  movsd  D31(%rip),%xmm0
  mov    0x4(%rsp),%edx
  lea    D66(%rip),%rdi
  mov    (%rsp),%esi
  mov    $0x1,%eax
  call   <printf@plt>
  lea    D14(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L1
  add    $0x10,%rsp
  xor    %eax,%eax
  pop    %rbp
  ret
L1:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D30
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D51
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D63
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D58
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D20
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D31
type_guessed: f64
name: extract_symbolic_data
arguments: data_label: D66
type_guessed: string
name: extract_symbolic_data
arguments: data_label: D14
type_guessed: string

tool: D30: Enter a field width: 

tool: D51: %d

tool: D63: The number is :%*d:


tool: D58: Now enter a width and a precision: 

tool: D20: %d %d

tool: D31: 242.5

tool: D66: Weight = %*.*f


tool: D14: Done!

assistant: ```c
int main(void) {
  unsigned width, precision;
  int number = 256;
  double weight = 242.5;
  printf("Enter a field width: \n");
  scanf("%d", &width);
  printf("The number is :%*d:\n", width, number);
  printf("Now enter a width and a precision: \n");
  scanf("%d %d", &width, &precision);
  printf("Weight = %*.*f\n", width, precision, weight);
  printf("Done!\n");
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<http_hextodec>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  movl   $0x0,-0xc(%rbp)
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  movb   $0x0,-0xd(%rbp)
  cmpq   $0x0,-0x18(%rbp)
  je     L50
  cmpl   $0x0,-0x1c(%rbp)
  jle    L50
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0xc(%rbp)
  movl   $0x1,-0x4(%rbp)
  jmp    L94
L30:
  mov    -0xc(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %al,-0xd(%rbp)
  cmpb   $0x40,-0xd(%rbp)
  jle    L51
  cmpb   $0x46,-0xd(%rbp)
  jg     L51
  movsbl -0xd(%rbp),%eax
  sub    $0x37,%eax
  imul   -0x4(%rbp),%eax
  add    %eax,-0x8(%rbp)
  jmp    L37
L51:
  cmpb   $0x60,-0xd(%rbp)
  jle    L98
  cmpb   $0x66,-0xd(%rbp)
  jg     L98
  movsbl -0xd(%rbp),%eax
  sub    $0x57,%eax
  imul   -0x4(%rbp),%eax
  add    %eax,-0x8(%rbp)
  jmp    L37
L98:
  cmpb   $0x2f,-0xd(%rbp)
  jle    L37
  cmpb   $0x39,-0xd(%rbp)
  jg     L37
  movsbl -0xd(%rbp),%eax
  sub    $0x30,%eax
  imul   -0x4(%rbp),%eax
  add    %eax,-0x8(%rbp)
L37:
  movzbl -0xd(%rbp),%eax
  sub    $0x1,%eax
  mov    %al,-0xd(%rbp)
  shll   $0x4,-0x4(%rbp)
  subl   $0x1,-0xc(%rbp)
L94:
  cmpl   $0x0,-0xc(%rbp)
  jns    L30
L50:
  mov    -0x8(%rbp),%eax
  pop    %rbp
  ret
```

assistant: ```c
int http_hextodec(char *hex, int len) {
  int k = 0, n = 0, x = 0;
  char s = 0;
  if (hex && len > 0) {
    k = len - 1;
    x = 1;
    while (k >= 0) {
      s = hex[k];
      if (s >= 'A' && s <= 'F')
        n += (10 + (s - 'A')) * x;
      else if (s >= 'a' && s <= 'f')
        n += (10 + (s - 'a')) * x;
      else if (s >= '0' && s <= '9')
        n += (s - '0') * x;
      --s;
      x <<= 4;
      --k;
    }
  }
  return n;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<http_hextodec>:
  endbr64
  test   %rdi,%rdi
  je     L66
  test   %esi,%esi
  jle    L66
  sub    $0x1,%esi
  movslq %esi,%rdx
  mov    $0x1,%ecx
  mov    $0x0,%esi
  jmp    L46
L58:
  lea    -0x61(%rax),%r8d
  cmp    $0x5,%r8b
  ja     L76
  movsbl %al,%eax
  sub    $0x57,%eax
  imul   %ecx,%eax
  add    %eax,%esi
L75:
  shl    $0x4,%ecx
  sub    $0x1,%rdx
  test   %edx,%edx
  js     L74
L46:
  movzbl (%rdi,%rdx,1),%eax
  lea    -0x41(%rax),%r8d
  cmp    $0x5,%r8b
  ja     L58
  movsbl %al,%eax
  sub    $0x37,%eax
  imul   %ecx,%eax
  add    %eax,%esi
  jmp    L75
L76:
  lea    -0x30(%rax),%r8d
  cmp    $0x9,%r8b
  ja     L75
  movsbl %al,%eax
  sub    $0x30,%eax
  imul   %ecx,%eax
  add    %eax,%esi
  jmp    L75
L66:
  mov    $0x0,%esi
L74:
  mov    %esi,%eax
  ret
```

assistant: ```c
int http_hextodec(char *hex, int len) {
  int k = 0, n = 0, x = 0;
  char s = 0;
  if (hex && len > 0) {
    k = len - 1;
    x = 1;
    while (k >= 0) {
      s = hex[k];
      if (s >= 'A' && s <= 'F')
        n += (10 + (s - 'A')) * x;
      else if (s >= 'a' && s <= 'f')
        n += (10 + (s - 'a')) * x;
      else if (s >= '0' && s <= '9')
        n += (s - '0') * x;
      --s;
      x <<= 4;
      --k;
    }
  }
  return n;
}
```
user: Translate the below assembly code into C programming language:

```asm
<http_hextodec>:
  endbr64
  test   %rdi,%rdi
  je     L22
  test   %esi,%esi
  jle    L22
  lea    -0x1(%rsi),%eax
  movslq %esi,%rsi
  mov    $0x1,%ecx
  xor    %r8d,%r8d
  movslq %eax,%rdx
  mov    %eax,%eax
  add    %rdi,%rdx
  lea    -0x2(%rdi,%rsi,1),%rdi
  sub    %rax,%rdi
  jmp    L31
  nopl   (%rax)
L51:
  sub    $0x37,%eax
  movsbl %al,%eax
  imul   %ecx,%eax
  add    %eax,%r8d
L85:
  sub    $0x1,%rdx
  shl    $0x4,%ecx
  cmp    %rdi,%rdx
  je     L54
L31:
  movzbl (%rdx),%eax
  lea    -0x41(%rax),%esi
  cmp    $0x5,%sil
  jbe    L51
  lea    -0x61(%rax),%esi
  cmp    $0x5,%sil
  ja     L33
  sub    $0x57,%eax
  sub    $0x1,%rdx
  movsbl %al,%eax
  imul   %ecx,%eax
  shl    $0x4,%ecx
  add    %eax,%r8d
  cmp    %rdi,%rdx
  jne    L31
L54:
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax)
L33:
  sub    $0x30,%eax
  cmp    $0x9,%al
  ja     L85
  movsbl %al,%eax
  imul   %ecx,%eax
  add    %eax,%r8d
  jmp    L85
  nopw   0x0(%rax,%rax,1)
L22:
  xor    %r8d,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int http_hextodec(char *hex, int len) {
  int k = 0, n = 0, x = 0;
  char s = 0;
  if (hex && len > 0) {
    k = len - 1;
    x = 1;
    while (k >= 0) {
      s = hex[k];
      if (s >= 'A' && s <= 'F')
        n += (10 + (s - 'A')) * x;
      else if (s >= 'a' && s <= 'f')
        n += (10 + (s - 'a')) * x;
      else if (s >= '0' && s <= '9')
        n += (s - '0') * x;
      --s;
      x <<= 4;
      --k;
    }
  }
  return n;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<http_hextodec>:
  endbr64
  test   %rdi,%rdi
  je     L1
  test   %esi,%esi
  jle    L1
  lea    -0x1(%rsi),%eax
  movslq %esi,%rsi
  mov    $0x1,%ecx
  xor    %r8d,%r8d
  movslq %eax,%rdx
  mov    %eax,%eax
  add    %rdi,%rdx
  lea    -0x2(%rdi,%rsi,1),%rdi
  sub    %rax,%rdi
  jmp    L51
  nopl   (%rax)
L75:
  sub    $0x37,%eax
  movsbl %al,%eax
  imul   %ecx,%eax
  add    %eax,%r8d
L64:
  sub    $0x1,%rdx
  shl    $0x4,%ecx
  cmp    %rdx,%rdi
  je     L25
L51:
  movzbl (%rdx),%eax
  lea    -0x41(%rax),%esi
  cmp    $0x5,%sil
  jbe    L75
  lea    -0x61(%rax),%esi
  cmp    $0x5,%sil
  ja     L61
  sub    $0x57,%eax
  sub    $0x1,%rdx
  movsbl %al,%eax
  imul   %ecx,%eax
  shl    $0x4,%ecx
  add    %eax,%r8d
  cmp    %rdx,%rdi
  jne    L51
L25:
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax)
L61:
  sub    $0x30,%eax
  cmp    $0x9,%al
  ja     L64
  movsbl %al,%eax
  imul   %ecx,%eax
  add    %eax,%r8d
  jmp    L64
  nopw   0x0(%rax,%rax,1)
L1:
  xor    %r8d,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int http_hextodec(char *hex, int len) {
  int k = 0, n = 0, x = 0;
  char s = 0;
  if (hex && len > 0) {
    k = len - 1;
    x = 1;
    while (k >= 0) {
      s = hex[k];
      if (s >= 'A' && s <= 'F')
        n += (10 + (s - 'A')) * x;
      else if (s >= 'a' && s <= 'f')
        n += (10 + (s - 'a')) * x;
      else if (s >= '0' && s <= '9')
        n += (s - '0') * x;
      --s;
      x <<= 4;
      --k;
    }
  }
  return n;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<extend_heap>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  and    $0x1,%eax
  test   %rax,%rax
  je     L15
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  shl    $0x2,%rax
  jmp    L26
L15:
  mov    -0x18(%rbp),%rax
  shl    $0x2,%rax
L26:
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <mem_sbrk@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0xffffffffffffffff,-0x8(%rbp)
  jne    L39
  mov    $0x0,%eax
  jmp    L24
L39:
  mov    -0x8(%rbp),%rax
  sub    $0x4,%rax
  mov    -0x10(%rbp),%rdx
  mov    %edx,(%rax)
  mov    -0x8(%rbp),%rax
  sub    $0x4,%rax
  mov    (%rax),%eax
  mov    %eax,%eax
  and    $0xfffffff8,%eax
  lea    -0x8(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    -0x10(%rbp),%rdx
  mov    %edx,(%rax)
  mov    -0x8(%rbp),%rax
  sub    $0x4,%rax
  mov    (%rax),%eax
  mov    %eax,%eax
  and    $0xfffffff8,%eax
  lea    -0x4(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movl   $0x1,(%rax)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <coalesce@plt>
L24:
  leave
  ret
```

assistant: ```c
void *extend_heap(size_t words) {
  char *bp;
  size_t size;
  size = (words % 2) ? (words + 1) * 4 : words * 4;
  if ((long)(bp = mem_sbrk(size)) == -1)
    return NULL;
  (*(unsigned int *)(((char *)(bp)-4)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7) - 8)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7))) - 4)) = (((0) | (1))));
  return coalesce(bp);
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<extend_heap>:
  endbr64
  push   %rbx
  lea    0x4(,%rdi,4),%rax
  lea    0x0(,%rdi,4),%rbx
  test   $0x1,%dil
  cmovne %rax,%rbx
  mov    %rbx,%rdi
  call   <mem_sbrk@plt>
  cmp    $0xffffffffffffffff,%rax
  je     L10
  mov    %rax,%rdi
  mov    %ebx,-0x4(%rax)
  mov    %rbx,%rax
  and    $0xfffffff8,%eax
  mov    %ebx,-0x8(%rdi,%rax,1)
  movl   $0x1,-0x4(%rdi,%rax,1)
  call   <coalesce@plt>
L12:
  pop    %rbx
  ret
L10:
  mov    $0x0,%eax
  jmp    L12
```

assistant: ```c
void *extend_heap(size_t words) {
  char *bp;
  size_t size;
  size = (words % 2) ? (words + 1) * 4 : words * 4;
  if ((long)(bp = mem_sbrk(size)) == -1)
    return NULL;
  (*(unsigned int *)(((char *)(bp)-4)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7) - 8)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7))) - 4)) = (((0) | (1))));
  return coalesce(bp);
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<extend_heap>:
  endbr64
  push   %rbx
  lea    0x4(,%rdi,4),%rax
  lea    0x0(,%rdi,4),%rbx
  and    $0x1,%edi
  cmovne %rax,%rbx
  mov    %rbx,%rdi
  call   <mem_sbrk@plt>
  cmp    $0xffffffffffffffff,%rax
  je     L7
  mov    %ebx,-0x4(%rax)
  mov    %rax,%rdi
  mov    %rbx,%rax
  and    $0xfffffff8,%eax
  mov    %ebx,-0x8(%rdi,%rax,1)
  movl   $0x1,-0x4(%rdi,%rax,1)
  pop    %rbx
  jmp    1070 <coalesce@plt>
  nopl   0x0(%rax,%rax,1)
L7:
  xor    %eax,%eax
  pop    %rbx
  ret
```

assistant: ```c
void *extend_heap(size_t words) {
  char *bp;
  size_t size;
  size = (words % 2) ? (words + 1) * 4 : words * 4;
  if ((long)(bp = mem_sbrk(size)) == -1)
    return NULL;
  (*(unsigned int *)(((char *)(bp)-4)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7) - 8)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7))) - 4)) = (((0) | (1))));
  return coalesce(bp);
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<extend_heap>:
  endbr64
  push   %rbx
  lea    0x4(,%rdi,4),%rax
  lea    0x0(,%rdi,4),%rbx
  and    $0x1,%edi
  cmovne %rax,%rbx
  mov    %rbx,%rdi
  call   <mem_sbrk@plt>
  cmp    $0xffffffffffffffff,%rax
  je     L4
  mov    %ebx,-0x4(%rax)
  mov    %rax,%rdi
  mov    %rbx,%rax
  and    $0xfffffff8,%eax
  mov    %ebx,-0x8(%rdi,%rax,1)
  movl   $0x1,-0x4(%rdi,%rax,1)
  pop    %rbx
  jmp    1070 <coalesce@plt>
  nopl   0x0(%rax,%rax,1)
L4:
  xor    %eax,%eax
  pop    %rbx
  ret
```

assistant: ```c
void *extend_heap(size_t words) {
  char *bp;
  size_t size;
  size = (words % 2) ? (words + 1) * 4 : words * 4;
  if ((long)(bp = mem_sbrk(size)) == -1)
    return NULL;
  (*(unsigned int *)(((char *)(bp)-4)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7) - 8)) = (((size) | (0))));
  (*(unsigned int *)(((char *)(((char *)(bp) + ((*(unsigned int *)(((char *)(bp)-4))) & ~0x7))) - 4)) = (((0) | (1))));
  return coalesce(bp);
}
```