user: 请将以下的汇编代码转换成C语言代码:

```asm
<oneTimePadXOR>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  mov    %rcx,%rdi
  push   %r14
  mov    %rdx,%r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rcx,%rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,0x8(%rsp)
  call   <malloc@plt>
  mov    %rbp,%rdi
  mov    %rax,%rbx
  call   <malloc@plt>
  mov    %rbp,%rdi
  mov    %rax,%r12
  call   <malloc@plt>
  mov    %r15,%rcx
  mov    %rbp,%rdx
  mov    $0x1,%esi
  mov    %rbx,%rdi
  mov    %rax,%r13
  call   <fread@plt>
  mov    0x8(%rsp),%rcx
  mov    %r12,%rdi
  mov    %rbp,%rdx
  mov    $0x1,%esi
  mov    %rax,%r15
  call   <fread@plt>
  cmp    %r15,%rbp
  mov    %rax,%r8
  sete   %al
  xor    %edi,%edi
  cmp    %r8,%rbp
  sete   %dil
  and    %eax,%edi
  call   <assert@plt>
  test   %rbp,%rbp
  je     L44
  lea    0x1(%rbx),%rcx
  mov    %r13,%rdx
  lea    0x1(%r12),%rsi
  sub    %rcx,%rdx
  lea    -0x1(%rbp),%rax
  cmp    $0xe,%rdx
  mov    %r13,%rdx
  seta   %cl
  sub    %rsi,%rdx
  cmp    $0xe,%rdx
  seta   %dl
  test   %dl,%cl
  je     L125
  cmp    $0x6,%rax
  jbe    L125
  mov    %rbp,%rdx
  cmp    $0xe,%rax
  jbe    L123
  and    $0xfffffffffffffff0,%rdx
  mov    %r12,%rsi
  mov    %r13,%rcx
  mov    %rbx,%rax
  add    %rbx,%rdx
  sub    %rbx,%rsi
  sub    %rbx,%rcx
  nopw   0x0(%rax,%rax,1)
L96:
  movdqu (%rsi,%rax,1),%xmm0
  movdqu (%rax),%xmm2
  pxor   %xmm2,%xmm0
  movups %xmm0,(%rcx,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L96
  mov    %rbp,%rax
  and    $0xfffffffffffffff0,%rax
  test   $0xf,%bpl
  je     L44
  mov    %rbp,%rdx
  sub    %rax,%rdx
  lea    -0x1(%rdx),%rcx
  cmp    $0x6,%rcx
  jbe    L19
L95:
  movq   (%rbx,%rax,1),%xmm0
  movq   (%r12,%rax,1),%xmm1
  mov    %rdx,%rcx
  and    $0xfffffffffffffff8,%rcx
  pxor   %xmm1,%xmm0
  movq   %xmm0,0x0(%r13,%rax,1)
  add    %rcx,%rax
  cmp    %rcx,%rdx
  je     L44
L19:
  movzbl (%rbx,%rax,1),%edx
  xor    (%r12,%rax,1),%dl
  mov    %dl,0x0(%r13,%rax,1)
  lea    0x1(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x1(%rbx,%rax,1),%edx
  xor    0x1(%r12,%rax,1),%dl
  mov    %dl,0x1(%r13,%rax,1)
  lea    0x2(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x2(%rbx,%rax,1),%edx
  xor    0x2(%r12,%rax,1),%dl
  mov    %dl,0x2(%r13,%rax,1)
  lea    0x3(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x3(%rbx,%rax,1),%edx
  xor    0x3(%r12,%rax,1),%dl
  mov    %dl,0x3(%r13,%rax,1)
  lea    0x4(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x4(%rbx,%rax,1),%edx
  xor    0x4(%r12,%rax,1),%dl
  mov    %dl,0x4(%r13,%rax,1)
  lea    0x5(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x5(%rbx,%rax,1),%edx
  xor    0x5(%r12,%rax,1),%dl
  mov    %dl,0x5(%r13,%rax,1)
  lea    0x6(%rax),%rdx
  cmp    %rdx,%rbp
  jbe    L44
  movzbl 0x6(%rbx,%rax,1),%edx
  xor    0x6(%r12,%rax,1),%dl
  mov    %dl,0x6(%r13,%rax,1)
L44:
  mov    %r14,%rcx
  mov    %rbp,%rdx
  mov    %r13,%rdi
  mov    $0x1,%esi
  call   <fwrite@plt>
  xor    %edi,%edi
  cmp    %rax,%rbp
  sete   %dil
  call   <assert@plt>
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L125:
  mov    %r13,%rcx
  lea    (%rbx,%rbp,1),%rsi
  mov    %rbx,%rax
  sub    %rbx,%r12
  sub    %rbx,%rcx
L124:
  movzbl (%r12,%rax,1),%edx
  xor    (%rax),%dl
  mov    %dl,(%rcx,%rax,1)
  add    $0x1,%rax
  cmp    %rsi,%rax
  jne    L124
  jmp    L44
L123:
  xor    %eax,%eax
  jmp    L95
```

assistant: ```c
int oneTimePadXOR(FILE *argument1, FILE *argument2, FILE *output, const size_t length) {
  char *a = (char *)malloc(length);
  char *b = (char *)malloc(length);
  char *c = (char *)malloc(length);
  size_t read1 = fread(a, 1, length, argument1);
  size_t read2 = fread(b, 1, length, argument2);
  assert(read1 == length && read2 == length);
  for (size_t index = 0; index < length; index++)
    c[index] = a[index] ^ b[index];
  size_t wrote = fwrite(c, 1, length, output);
  assert(wrote == length);
  return 0;
}
```