user: What would the C source look like for the assembly code provided here:

```asm
<strMerge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %rcx,-0x40(%rbp)
  mov    %r8,-0x48(%rbp)
  mov    %r9,-0x50(%rbp)
  mov    -0x30(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strLen@plt>
  mov    %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strLen@plt>
  mov    %rax,-0x40(%rbp)
  mov    -0x30(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x30(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <cloneStr@plt>
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    -0x8(%rbp),%rdx
  mov    -0x38(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <cloneStr@plt>
  movq   $0x0,-0x20(%rbp)
  jmp    L7
L1:
  mov    -0x10(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    -0x48(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addq   $0x1,-0x20(%rbp)
L7:
  mov    -0x20(%rbp),%rax
  cmp    -0x50(%rbp),%rax
  jae    L31
  mov    -0x20(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  jb     L1
L31:
  movq   $0x0,-0x18(%rbp)
  jmp    L47
L68:
  mov    -0x8(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    -0x20(%rbp),%rcx
  mov    -0x18(%rbp),%rdx
  add    %rdx,%rcx
  mov    -0x48(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addq   $0x1,-0x18(%rbp)
L47:
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  cmp    %rax,-0x50(%rbp)
  jbe    L5
  mov    -0x18(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jb     L68
L5:
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  cmp    %rax,-0x50(%rbp)
  jbe    L3
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x50(%rbp)
  jmp    L61
L3:
  subq   $0x1,-0x50(%rbp)
  mov    -0x48(%rbp),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
L61:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x50(%rbp),%rax
  leave
  ret
```

assistant: ```c
unsigned long strMerge(char *prefix, unsigned long sizeOfPfx, char *sufix, unsigned long sizeOfSfx, char *mergeInto, unsigned long sizeOfResult) {
  char *prefixClone, *sufixClone;
  unsigned long i, j;
  sizeOfPfx = strLen(prefix, sizeOfPfx);
  sizeOfSfx = strLen(sufix, sizeOfSfx);
  prefixClone = (char *)malloc(sizeOfPfx + 1);
  sufixClone = (char *)malloc(sizeOfSfx + 1);
  cloneStr(prefix, sizeOfPfx + 1, prefixClone);
  cloneStr(sufix, sizeOfSfx + 1, sufixClone);
  for (i = 0; i < sizeOfResult && i < sizeOfPfx; i++) {
    mergeInto[i] = prefixClone[i];
  }
  for (j = 0; i + j < sizeOfResult && j < sizeOfSfx; j++) {
    mergeInto[i + j] = sufixClone[j];
  }
  if (i + j < sizeOfResult) {
    mergeInto[i + j] = '\0';
    sizeOfResult = i + j;
  } else {
    mergeInto[--sizeOfResult] = '\0';
  }
  free(prefixClone);
  free(sufixClone);
  return sizeOfResult;
}
```