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

```asm
<enumerate_ring_faces>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,0x8(%rsp)
  mov    %edx,0xc(%rsp)
  mov    %ecx,%r12d
  mov    %r8,(%rsp)
  mov    %r9,%rbp
  cmp    $0x1,%esi
  je     L126
  mov    %esi,%r13d
  mov    $0x0,%r14d
  mov    $0x0,%ebx
  cmp    %ecx,%esi
  jne    L101
  test   %esi,%esi
  jle    L43
  mov    0x8(%rsp),%r12d
  mov    0xc(%rsp),%r14d
  mov    $0x1,%ebx
  lea    -0x1(%rsi),%r15d
  jmp    L0
L126:
  test   %ecx,%ecx
  jle    L43
  mov    $0x0,%ebx
  lea    -0x1(%rcx),%r13d
  jmp    L51
L164:
  add    $0x1,%ebx
  cmp    %ebx,%r12d
  je     L43
L51:
  lea    -0x1(%rbx),%ecx
  test   %ebx,%ebx
  cmove  %r13d,%ecx
  mov    0xc(%rsp),%eax
  add    %eax,%ecx
  lea    (%rax,%rbx,1),%edx
  mov    $0xffffffff,%r8d
  mov    0x8(%rsp),%esi
  mov    (%rsp),%rdi
  call   *0x50(%rsp)
  test   %rbp,%rbp
  je     L164
  addl   $0x1,0x0(%rbp)
  jmp    L164
L118:
  mov    0xc(%rsp),%eax
  lea    (%rax,%r15,1),%ecx
  mov    0x8(%rsp),%eax
  lea    (%rax,%r15,1),%r8d
  mov    %r14d,%edx
  mov    %r12d,%esi
  mov    (%rsp),%rdi
  call   *0x50(%rsp)
  test   %rbp,%rbp
  je     L29
L158:
  addl   $0x1,0x0(%rbp)
L48:
  cmp    %ebx,%r13d
  jle    L43
L29:
  add    $0x1,%ebx
  add    $0x1,%r12d
  add    $0x1,%r14d
L0:
  cmp    $0x1,%ebx
  je     L118
  lea    -0x1(%r14),%ecx
  lea    -0x1(%r12),%r8d
  mov    %r14d,%edx
  mov    %r12d,%esi
  mov    (%rsp),%rdi
  call   *0x50(%rsp)
  test   %rbp,%rbp
  jne    L158
  jmp    L48
L98:
  cmp    %r13d,%ebx
  je     L43
  lea    0x1(%rbx),%r15d
  mov    %r14d,%eax
  cltd
  idiv   %r12d
  mov    0xc(%rsp),%eax
  lea    (%rdx,%rax,1),%ecx
  mov    %r15d,%eax
  cltd
  idiv   %r13d
  mov    0x8(%rsp),%eax
  add    %eax,%edx
  lea    (%rbx,%rax,1),%esi
  mov    $0xffffffff,%r8d
  mov    (%rsp),%rdi
  call   *0x50(%rsp)
  mov    %r15d,%ebx
  test   %rbp,%rbp
  je     L101
  addl   $0x1,0x0(%rbp)
L101:
  cmp    %r12d,%r14d
  jge    L98
  lea    0x1(%r14,%r14,1),%edx
  imul   %r13d,%edx
  lea    0x1(%rbx,%rbx,1),%eax
  imul   %r12d,%eax
  cmp    %eax,%edx
  jge    L98
  mov    0xc(%rsp),%edi
  lea    (%r14,%rdi,1),%ecx
  add    $0x1,%r14d
  mov    %r14d,%eax
  cltd
  idiv   %r12d
  add    %edx,%edi
  mov    %ebx,%eax
  cltd
  idiv   %r13d
  mov    0x8(%rsp),%eax
  lea    (%rdx,%rax,1),%esi
  mov    $0xffffffff,%r8d
  mov    %edi,%edx
  mov    (%rsp),%rdi
  call   *0x50(%rsp)
  test   %rbp,%rbp
  je     L101
  addl   $0x1,0x0(%rbp)
  jmp    L101
L43:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void enumerate_ring_faces(int basevertex, int steps, int prevbase, int prevsteps, void *h, int *count_ret, void (*process_face)(void *h, int v1, int v2, int v3, int v4)) {
  int i, j;
  if (steps == 1) {
    for (i = 0; i < prevsteps; i++) {
      process_face(h, basevertex, prevbase + i, prevbase + (i ? i - 1 : prevsteps - 1), -1);
      if (count_ret)
        (*count_ret)++;
    }
  } else if (steps == prevsteps) {
    for (i = 0; i < steps; i++) {
      process_face(h, basevertex + i, prevbase + i, prevbase + (i ? i - 1 : steps - 1), basevertex + (i ? i - 1 : steps - 1));
      if (count_ret)
        (*count_ret)++;
    }
  } else {
    j = 0;
    for (i = 0;; i++) {
      while (j < prevsteps && steps * (1 + 2 * j) < prevsteps * (1 + 2 * i)) {
        process_face(h, basevertex + (i % steps), prevbase + ((j + 1) % prevsteps), prevbase + j, -1);
        if (count_ret)
          (*count_ret)++;
        j++;
      }
      if (i == steps)
        break;
      process_face(h, basevertex + i, basevertex + ((i + 1) % steps), prevbase + (j % prevsteps), -1);
      if (count_ret)
        (*count_ret)++;
    }
  }
}
```