user: 请将以下的汇编代码转换成C语言代码：

```asm
<assign_id>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %edx,-0x30(%rbp)
  mov    %rcx,-0x38(%rbp)
  movl   $0x0,-0x10(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L92
L289:
  movl   $0x0,-0x20(%rbp)
  jmp    L327
L248:
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  movl   $0x0,(%rax)
  addl   $0x1,-0x20(%rbp)
L327:
  mov    -0x20(%rbp),%eax
  cmp    -0x2c(%rbp),%eax
  jl     L248
  addl   $0x1,-0x1c(%rbp)
L92:
  mov    -0x1c(%rbp),%eax
  cmp    -0x30(%rbp),%eax
  jl     L289
  movl   $0x0,-0x1c(%rbp)
  jmp    L310
L317:
  movl   $0x0,-0x20(%rbp)
  jmp    L254
L349:
  mov    -0x1c(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L105
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jne    L105
  movl   $0x0,-0xc(%rbp)
  movl   $0x0,-0x8(%rbp)
  cmpl   $0x0,-0x1c(%rbp)
  jle    L79
  mov    -0x1c(%rbp),%eax
  cltq
  shl    $0x3,%rax
  lea    -0x8(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0xc(%rbp)
L79:
  cmpl   $0x0,-0x20(%rbp)
  jle    L169
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  sub    $0x4,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x8(%rbp)
L169:
  cmpl   $0x0,-0xc(%rbp)
  jne    L53
  cmpl   $0x0,-0x8(%rbp)
  jne    L53
  addl   $0x1,-0x10(%rbp)
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0x10(%rbp),%eax
  mov    %eax,(%rdx)
  jmp    L105
L53:
  mov    -0xc(%rbp),%eax
  cmp    -0x8(%rbp),%eax
  jne    L23
  cmpl   $0x0,-0xc(%rbp)
  je     L23
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,(%rdx)
  jmp    L105
L23:
  cmpl   $0x0,-0xc(%rbp)
  je     L235
  cmpl   $0x0,-0x8(%rbp)
  jne    L235
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,(%rdx)
  jmp    L105
L235:
  cmpl   $0x0,-0xc(%rbp)
  jne    L65
  cmpl   $0x0,-0x8(%rbp)
  je     L65
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  mov    %eax,(%rdx)
  jmp    L105
L65:
  cmpl   $0x0,-0xc(%rbp)
  je     L105
  cmpl   $0x0,-0x8(%rbp)
  je     L105
  mov    -0xc(%rbp),%eax
  cmp    -0x8(%rbp),%eax
  jge    L223
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x30(%rbp),%edi
  mov    -0x2c(%rbp),%ecx
  mov    -0x8(%rbp),%edx
  mov    -0xc(%rbp),%esi
  mov    -0x38(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <replace_obj_id@plt>
  jmp    L105
L223:
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  mov    %eax,(%rdx)
  mov    -0x30(%rbp),%edi
  mov    -0x2c(%rbp),%ecx
  mov    -0xc(%rbp),%edx
  mov    -0x8(%rbp),%esi
  mov    -0x38(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <replace_obj_id@plt>
L105:
  addl   $0x1,-0x20(%rbp)
L254:
  mov    -0x20(%rbp),%eax
  cmp    -0x2c(%rbp),%eax
  jl     L349
  addl   $0x1,-0x1c(%rbp)
L310:
  mov    -0x1c(%rbp),%eax
  cmp    -0x30(%rbp),%eax
  jl     L317
  movl   $0x0,-0x14(%rbp)
  movl   $0x1,-0x18(%rbp)
  jmp    L283
L329:
  movl   $0x0,-0x4(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L35
L253:
  movl   $0x0,-0x20(%rbp)
  jmp    L206
L276:
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    %eax,-0x18(%rbp)
  jne    L351
  addl   $0x1,-0x4(%rbp)
L351:
  addl   $0x1,-0x20(%rbp)
L206:
  mov    -0x20(%rbp),%eax
  cmp    -0x2c(%rbp),%eax
  jl     L276
  addl   $0x1,-0x1c(%rbp)
L35:
  mov    -0x1c(%rbp),%eax
  cmp    -0x30(%rbp),%eax
  jl     L253
  cmpl   $0x0,-0x4(%rbp)
  jle    L342
  addl   $0x1,-0x14(%rbp)
  mov    -0x30(%rbp),%edi
  mov    -0x2c(%rbp),%ecx
  mov    -0x18(%rbp),%edx
  mov    -0x14(%rbp),%esi
  mov    -0x38(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <replace_obj_id@plt>
L342:
  addl   $0x1,-0x18(%rbp)
L283:
  mov    -0x18(%rbp),%eax
  cmp    -0x10(%rbp),%eax
  jle    L329
  mov    -0x14(%rbp),%eax
  leave
  ret
```

assistant: ```c
int assign_id(unsigned char *img, int width, int height, int **obj_id) {
  int x, y, s;
  int count, val = 0;
  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      obj_id[y][x] = 0;
    }
  }
  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      if (img[x + y * width] == 0 && obj_id[y][x] == 0) {
        int u = 0, l = 0;
        if (y > 0)
          u = obj_id[y - 1][x];
        if (x > 0)
          l = obj_id[y][x - 1];
        if (u == 0 && l == 0) {
          obj_id[y][x] = ++val;
        } else if (u == l && u != 0) {
          obj_id[y][x] = u;
        } else if (u != 0 && l == 0) {
          obj_id[y][x] = u;
        } else if (u == 0 && l != 0) {
          obj_id[y][x] = l;
        } else if (u != 0 && l != 0) {
          if (u < l) {
            obj_id[y][x] = u;
            replace_obj_id(obj_id, u, l, width, height);
          } else {
            obj_id[y][x] = l;
            replace_obj_id(obj_id, l, u, width, height);
          }
        }
      }
    }
  }
  count = 0;
  for (s = 1; s <= val; s++) {
    int n = 0;
    for (y = 0; y < height; y++) {
      for (x = 0; x < width; x++) {
        if (obj_id[y][x] == s)
          n += 1;
      }
    }
    if (n > 0) {
      count += 1;
      replace_obj_id(obj_id, count, s, width, height);
    }
  }
  return count;
}
```