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

```asm
<strMerge>:
  endbr64
  push   %r15
  push   %r14
  mov    %r9,%r14
  push   %r13
  mov    %rdx,%r13
  push   %r12
  mov    %rcx,%r12
  push   %rbp
  mov    %r8,%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,0x10(%rsp)
  call   <strLen@plt>
  mov    %r12,%rsi
  mov    %r13,%rdi
  mov    %rax,%rbx
  call   <strLen@plt>
  lea    0x1(%rbx),%rsi
  mov    %rsi,%rdi
  mov    %rax,%r12
  mov    %rsi,0x8(%rsp)
  mov    %rax,0x18(%rsp)
  call   <malloc@plt>
  lea    0x1(%r12),%r8
  mov    %r8,%rdi
  mov    %r8,(%rsp)
  mov    %rax,%r15
  call   <malloc@plt>
  mov    0x8(%rsp),%rsi
  mov    0x10(%rsp),%rdi
  mov    %r15,%rdx
  mov    %rax,%r12
  call   <cloneStr@plt>
  mov    (%rsp),%rsi
  mov    %r12,%rdx
  mov    %r13,%rdi
  call   <cloneStr@plt>
  cmp    %r14,%rbx
  mov    %rbx,%rax
  cmova  %r14,%rax
  test   %rax,%rax
  je     L125
  lea    0x1(%r15),%rsi
  mov    %rbp,%rcx
  lea    -0x1(%rax),%rdx
  sub    %rsi,%rcx
  cmp    $0xe,%rcx
  jbe    L17
  cmp    $0x6,%rdx
  jbe    L17
  mov    %rax,%rcx
  cmp    $0xe,%rdx
  jbe    L20
  and    $0xfffffffffffffff0,%rcx
  mov    %rbp,%rsi
  mov    %r15,%rdx
  add    %r15,%rcx
  sub    %r15,%rsi
  nopl   0x0(%rax)
L87:
  movdqu (%rdx),%xmm0
  movups %xmm0,(%rsi,%rdx,1)
  add    $0x10,%rdx
  cmp    %rdx,%rcx
  jne    L87
  mov    %rax,%rdx
  and    $0xfffffffffffffff0,%rdx
  test   $0xf,%al
  je     L125
  mov    %rax,%rcx
  sub    %rdx,%rcx
  lea    -0x1(%rcx),%rsi
  cmp    $0x6,%rsi
  jbe    L187
L28:
  mov    (%r15,%rdx,1),%rsi
  mov    %rsi,0x0(%rbp,%rdx,1)
  mov    %rcx,%rsi
  and    $0xfffffffffffffff8,%rsi
  add    %rsi,%rdx
  cmp    %rsi,%rcx
  je     L125
L187:
  movzbl (%r15,%rdx,1),%ecx
  mov    %cl,0x0(%rbp,%rdx,1)
  lea    0x1(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x1(%r15,%rdx,1),%ecx
  mov    %cl,0x1(%rbp,%rdx,1)
  lea    0x2(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x2(%r15,%rdx,1),%ecx
  mov    %cl,0x2(%rbp,%rdx,1)
  lea    0x3(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x3(%r15,%rdx,1),%ecx
  mov    %cl,0x3(%rbp,%rdx,1)
  lea    0x4(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x4(%r15,%rdx,1),%ecx
  mov    %cl,0x4(%rbp,%rdx,1)
  lea    0x5(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x5(%r15,%rdx,1),%ecx
  mov    %cl,0x5(%rbp,%rdx,1)
  lea    0x6(%rdx),%rcx
  cmp    %rcx,%rax
  jbe    L125
  movzbl 0x6(%r15,%rdx,1),%ecx
  mov    %cl,0x6(%rbp,%rdx,1)
L125:
  cmp    %rax,%r14
  jbe    L25
  mov    0x18(%rsp),%rbx
  test   %rbx,%rbx
  je     L60
  add    %rax,%rbx
  mov    %r12,%rcx
  mov    %rbx,%r13
  sub    %rax,%rcx
  jmp    L92
L229:
  cmp    %r13,%rax
  je     L169
L92:
  movzbl (%rcx,%rax,1),%edx
  mov    %dl,0x0(%rbp,%rax,1)
  add    $0x1,%rax
  cmp    %r14,%rax
  jne    L229
L25:
  movb   $0x0,-0x1(%rbp,%r14,1)
  lea    -0x1(%r14),%r13
L220:
  mov    %r15,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  add    $0x28,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L60:
  mov    %rax,%r13
  nopl   (%rax)
L169:
  movb   $0x0,0x0(%rbp,%r13,1)
  jmp    L220
L17:
  mov    %rbp,%rsi
  lea    (%r15,%rax,1),%rdi
  mov    %r15,%rdx
  sub    %r15,%rsi
  nopl   (%rax)
L219:
  movzbl (%rdx),%ecx
  mov    %cl,(%rsi,%rdx,1)
  add    $0x1,%rdx
  cmp    %rdx,%rdi
  jne    L219
  jmp    L125
L20:
  xor    %edx,%edx
  jmp    L28
```

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;
}
```