user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %r12
  mov    $0x1,%esi
  push   %rbp
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    0xa(%rsp),%r12
  movb   $0x1,0xa(%rsp)
  lea    0xb(%rsp),%rbp
  mov    %r12,%rdi
  call   <bu_bzero@plt>
  xor    %edi,%edi
  cmpb   $0x0,0xa(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x1,%esi
  mov    %r12,%rdi
  movb   $0xff,0xa(%rsp)
  call   <bu_bzero@plt>
  xor    %edi,%edi
  cmpb   $0x0,0xa(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x1,%esi
  mov    %r12,%rdi
  movb   $0x0,0xa(%rsp)
  call   <bu_fill@plt>
  xor    %edi,%edi
  cmpb   $0xff,0xa(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rsi
  mov    $0x1,%edx
  mov    %r12,%rdi
  movb   $0x17,0xb(%rsp)
  call   <bu_memcpy@plt>
  xor    %edi,%edi
  cmpb   $0x17,0xa(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rsi
  mov    $0x1,%edx
  mov    %r12,%rdi
  movb   $0x5a,0xb(%rsp)
  call   <bu_invert@plt>
  mov    $0xa5,%edi
  movb   $0xa5,0xa(%rsp)
  call   <assert@plt>
  mov    %rbp,%rsi
  mov    $0x1,%edx
  mov    %rbp,%rdi
  call   <bu_memcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rsi
  mov    $0x1,%edx
  mov    %rbp,%rdi
  call   <bu_equal@plt>
  mov    %eax,%edi
  call   <assert@plt>
  mov    %rbp,%rsi
  mov    $0x1,%edx
  mov    %rbp,%rdi
  call   <bu_opposite@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  movb   $0x7b,0xb(%rsp)
  movb   $0x62,0xa(%rsp)
  call   <bu_memcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  setne  %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <bu_equal@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  setne  %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <bu_opposite@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  setne  %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  movb   $0x7b,0xb(%rsp)
  movb   $0x84,0xa(%rsp)
  call   <bu_memcmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  setne  %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <bu_equal@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  setne  %dil
  call   <assert@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <bu_opposite@plt>
  xor    %edi,%edi
  lea    0xc(%rsp),%rbp
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x4,%edx
  mov    %rbp,%rdi
  mov    $0x35,%esi
  movl   $0x35,0x10(%rsp)
  movl   $0x0,0xc(%rsp)
  call   <bu_memset@plt>
  xor    %edi,%edi
  cmpl   $0x35353535,0xc(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    0x10(%rsp),%esi
  mov    $0x4,%edx
  mov    %rbp,%rdi
  call   <bu_isset@plt>
  mov    %eax,%edi
  call   <assert@plt>
  mov    0x10(%rsp),%esi
  mov    %rbp,%rdi
  mov    $0x4,%edx
  movl   $0x35000035,0xc(%rsp)
  call   <bu_isset@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  lea    0x14(%rsp),%rdx
  lea    0x10(%rsp),%rsi
  mov    %rbp,%rdi
  mov    $0x4,%ecx
  movl   $0x1020304,0x10(%rsp)
  movl   $0x1f2e3d4c,0x14(%rsp)
  call   <bu_xor@plt>
  xor    %edi,%edi
  cmpl   $0x1e2c3e48,0xc(%rsp)
  sete   %dil
  call   <assert@plt>
  lea    D4(%rip),%rdi
  call   <printf@plt>
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L6
  add    $0x28,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
L6:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D4
type_guessed: string

tool: D4: Done.


assistant: ```c
int main(int argc, char **argv) {
  unsigned char dst, src;
  int dsti, srci, src2i;
  dst = 1;
  bu_bzero(&dst, 1);
  assert(dst == 0);
  dst = 0xFF;
  bu_bzero(&dst, 1);
  assert(dst == 0x00);
  dst = 0x00;
  bu_fill(&dst, 1);
  assert(dst == 0xFF);
  src = 23;
  bu_memcpy(&dst, &src, 1);
  assert(dst == 23);
  src = 0x5A;
  bu_invert(&dst, &src, 1);
  assert(dst = 0xA5);
  assert(0 == bu_memcmp(&src, &src, 1));
  assert(bu_equal(&src, &src, 1));
  assert(!bu_opposite(&src, &src, 1));
  src = 123;
  dst = 98;
  assert(0 != bu_memcmp(&src, &dst, 1));
  assert(1 != bu_equal(&src, &dst, 1));
  assert(1 != bu_opposite(&src, &dst, 1));
  src = 123;
  dst = ~src;
  assert(0 != bu_memcmp(&src, &dst, 1));
  assert(1 != bu_equal(&src, &dst, 1));
  assert(1 == bu_opposite(&src, &dst, 1));
  srci = 0x35;
  dsti = 0;
  bu_memset(&dsti, srci, 4);
  assert(0x35353535 == dsti);
  assert(bu_isset(&dsti, srci, 4));
  dsti = 0x35000035;
  assert(!bu_isset(&dsti, srci, 4));
  srci = 0x01020304;
  src2i = 0x1F2E3D4C;
  bu_xor(&dsti, &srci, &src2i, 4);
  assert(dsti == 0x1E2C3E48);
  argc = argc;
  argv = argv;
  printf("Done.\n");
  return 0;
}
```