user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rsi,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  cmp    $0x3,%edi
  jne    L54
L1:
  mov    0x8(%rbx),%rdi
  lea    D28(%rip),%rbp
  mov    %rbp,%rsi
  call   <fopen@plt>
  mov    %rax,%r15
  mov    0x10(%rbx),%rdi
  mov    %rbp,%rsi
  call   <fopen@plt>
  mov    %rax,%r14
  movl   $0x0,0x1c(%rsp)
  lea    0x24(%rsp),%rax
  mov    %rax,0x8(%rsp)
  lea    0x26(%rsp),%rax
  mov    %rax,0x10(%rsp)
  jmp    L20
L54:
  lea    D30(%rip),%rdi
  call   <puts@plt>
  mov    $0x2,%edi
  call   <exit@plt>
  jmp    L1
L51:
  lea    D45(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L57
L84:
  mov    %ebx,%esi
  lea    D40(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L92:
  addl   $0x1,0x1c(%rsp)
L20:
  mov    %r15,%rcx
  mov    $0x1,%edx
  mov    $0x2,%esi
  mov    0x8(%rsp),%rdi
  call   <fread@plt>
  mov    %eax,%ebp
  mov    %r14,%rcx
  mov    $0x1,%edx
  mov    $0x2,%esi
  mov    0x10(%rsp),%rdi
  call   <fread@plt>
  movswl 0x24(%rsp),%r13d
  movswl 0x26(%rsp),%r12d
  mov    %r13d,%ebx
  sub    %r12d,%ebx
  mov    %ebp,%edx
  or     %eax,%edx
  je     L75
  test   %ebp,%ebp
  je     L51
  test   %eax,%eax
  je     L51
L57:
  sub    %r13d,%r12d
  test   %ebx,%ebx
  cmovs  %r12d,%ebx
  cmp    $0x1,%ebx
  jg     L84
  test   %ebx,%ebx
  je     L20
  jmp    L92
L75:
  mov    %r15,%rdi
  call   <fclose@plt>
  mov    %r14,%rdi
  call   <fclose@plt>
  mov    0x1c(%rsp),%esi
  lea    D18(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x0,%edi
  call   <exit@plt>
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L86
  mov    $0x0,%eax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L86:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D28
data_type: string
name: extract_symbolic_data
arguments: data_label: D30
data_type: string
name: extract_symbolic_data
arguments: data_label: D45
data_type: string
name: extract_symbolic_data
arguments: data_label: D40
data_type: string
name: extract_symbolic_data
arguments: data_label: D18
data_type: string

tool: D28: rb

tool: D30: compare <file1> <file2>

tool: D45: FATAL error, files have different size!

tool: D40: FATAL error, too large a difference found (%d)!


tool: D18: %d (+/-1)differences found


assistant: ```c
int main(int argc, char **argv) {
  FILE *f0, *f1;
  int dif = 0;
  if (argc != 3) {
    printf("compare <file1> <file2>\n");
    exit(2);
  }
  f0 = fopen(argv[1], "rb");
  f1 = fopen(argv[2], "rb");
  for (;;) {
    short c0;
    short c1;
    int d;
    int e0 = fread(&c0, 2, 1, f0);
    int e1 = fread(&c1, 2, 1, f1);
    d = c0 - c1;
    if (e0 == 0 && e1 == 0)
      break;
    if (e0 == 0 || e1 == 0) {
      printf("FATAL error, files have different size!\n");
      exit(1);
    }
    if (d < 0)
      d = -d;
    if (d > 1) {
      printf("FATAL error, too large a difference found (%d)!\n", d);
      exit(1);
    }
    if (d)
      dif++;
  }
  fclose(f0);
  fclose(f1);
  printf("%d (+/-1)differences found\n", dif);
  exit(0);
}
```