user: 请将以下的汇编代码转换成C语言代码：

```asm
<micro_apply_bitmask>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbx
  mov    %esi,%ebx
  sub    $0x48,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  mov    %esi,%eax
  mov    %rsp,%rcx
  imul   %esi,%eax
  cltq
  add    $0xf,%rax
  mov    %rax,%rsi
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rsi
  and    $0xfffffffffffffff0,%rdx
  sub    %rsi,%rcx
  cmp    %rcx,%rsp
  je     L234
L32:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L32
L234:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L23
L116:
  mov    %rax,%rdx
  mov    %rsp,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%r13
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L249
L121:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L121
L249:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L127
L92:
  mov    %rsp,%r14
  movslq %ebx,%rsi
  xor    %r15d,%r15d
  test   %ebx,%ebx
  jle    L231
  nopl   0x0(%rax,%rax,1)
L170:
  mov    $0xaaaaaaab,%eax
  mov    %r15d,%r10d
  mov    %r15d,%r9d
  xor    %edi,%edi
  imul   %rax,%r10
  lea    (%r12,%r15,1),%r8
  xor    %edx,%edx
  lea    0x0(%r13,%r15,1),%rax
  shr    $0x21,%r10
  jmp    L9
  nopw   0x0(%rax,%rax,1)
L133:
  mov    %ecx,%edx
L9:
  movb   $0x0,(%rax)
  testb  $0xf0,(%r8)
  jne    L163
  mov    %edx,%ecx
  mov    $0x1,%r11d
  and    $0x1,%ecx
  sub    %ecx,%r11d
  mov    %edx,%ecx
  sar    %ecx
  add    %r10d,%ecx
  and    $0x1,%ecx
  jne    L224
  add    $0x2,%r11d
L224:
  mov    %r11b,(%rax)
  mov    %edi,%ecx
  mov    $0xaaaaaaab,%r11d
  imul   %r11,%rcx
  shr    $0x21,%rcx
  lea    (%rcx,%rcx,2),%r11d
  mov    %edi,%ecx
  sub    %r11d,%ecx
  and    $0x1,%r11d
  jne    L173
  addb   $0x4,(%rax)
L173:
  lea    (%rdx,%r9,1),%r11d
  add    %r11d,%ecx
  and    $0x1,%ecx
  jne    L163
  addb   $0x8,(%rax)
L163:
  lea    0x1(%rdx),%ecx
  add    %rsi,%rax
  add    %rsi,%r8
  add    %r9d,%edi
  cmp    %ecx,%ebx
  jne    L133
  add    $0x1,%r15
  cmp    %rsi,%r15
  jne    L170
  xor    %r8d,%r8d
  nopl   (%rax)
L22:
  mov    %r8,%rcx
  xor    %edi,%edi
  nopl   (%rax)
L254:
  movzbl (%r12,%rcx,1),%eax
  and    $0x1,%eax
  neg    %eax
  xor    0x0(%r13,%rcx,1),%al
  mov    %al,(%r14,%rcx,1)
  mov    %edi,%eax
  add    %rsi,%rcx
  add    $0x1,%edi
  cmp    %eax,%edx
  jne    L254
  add    $0x1,%r8
  cmp    %r8,%rsi
  jne    L22
L231:
  xor    %r15d,%r15d
  lea    -0x60(%rbp),%rax
  mov    %r12,-0x68(%rbp)
  mov    %r15,%r12
  mov    %rax,%r15
  nopl   0x0(%rax)
L18:
  mov    %r12d,%edx
  mov    %ebx,%esi
  mov    %r14,%rdi
  call   <micro_evaluate@plt>
  mov    %eax,(%r15,%r12,4)
  add    $0x1,%r12
  cmp    $0x8,%r12
  jne    L18
  mov    -0x60(%rbp),%edx
  mov    -0x5c(%rbp),%ecx
  xor    %eax,%eax
  mov    -0x68(%rbp),%r12
  cmp    %ecx,%edx
  jge    L29
  mov    %ecx,%edx
  mov    $0x1,%eax
L29:
  mov    -0x58(%rbp),%ecx
  cmp    %ecx,%edx
  jge    L212
  mov    %ecx,%edx
  mov    $0x2,%eax
L212:
  cmp    -0x54(%rbp),%edx
  mov    $0x3,%edx
  cmovl  %edx,%eax
  test   %ebx,%ebx
  jle    L28
  mov    $0x1,%r9d
  mov    %eax,%ecx
  movslq %ebx,%rsi
  shl    %cl,%r9d
  xor    %r10d,%r10d
L145:
  mov    %r10,%rdx
  xor    %ecx,%ecx
  nopl   (%rax)
L174:
  movzbl 0x0(%r13,%rdx,1),%edi
  test   %r9d,%edi
  je     L41
  testb  $0x1,(%r12,%rdx,1)
  sete   (%r12,%rdx,1)
L41:
  add    $0x1,%ecx
  add    %rsi,%rdx
  cmp    %ecx,%ebx
  jne    L174
  add    $0x1,%r10
  cmp    %r10,%rsi
  jne    L145
L28:
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  jne    L118
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L23:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L116
L127:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L92
L118:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int micro_apply_bitmask(unsigned char *grid, int size) {
  int x, y;
  unsigned char p;
  int pattern, value[8];
  int best_val, best_pattern;
  unsigned char mask[size * size];
  unsigned char eval[size * size];
  for (x = 0; x < size; x++) {
    for (y = 0; y < size; y++) {
      mask[(y * size) + x] = 0x00;
      if (!(grid[(y * size) + x] & 0xf0)) {
        if ((y & 1) == 0) {
          mask[(y * size) + x] += 0x01;
        }
        if ((((y / 2) + (x / 3)) & 1) == 0) {
          mask[(y * size) + x] += 0x02;
        }
        if (((((y * x) & 1) + ((y * x) % 3)) & 1) == 0) {
          mask[(y * size) + x] += 0x04;
        }
        if (((((y + x) & 1) + ((y * x) % 3)) & 1) == 0) {
          mask[(y * size) + x] += 0x08;
        }
      }
    }
  }
  for (x = 0; x < size; x++) {
    for (y = 0; y < size; y++) {
      if (grid[(y * size) + x] & 0x01) {
        p = 0xff;
      } else {
        p = 0x00;
      }
      eval[(y * size) + x] = mask[(y * size) + x] ^ p;
    }
  }
  for (pattern = 0; pattern < 8; pattern++) {
    value[pattern] = micro_evaluate(eval, size, pattern);
  }
  best_pattern = 0;
  best_val = value[0];
  for (pattern = 1; pattern < 4; pattern++) {
    if (value[pattern] > best_val) {
      best_pattern = pattern;
      best_val = value[pattern];
    }
  }
  for (x = 0; x < size; x++) {
    for (y = 0; y < size; y++) {
      if (mask[(y * size) + x] & (0x01 << best_pattern)) {
        if (grid[(y * size) + x] & 0x01) {
          grid[(y * size) + x] = 0x00;
        } else {
          grid[(y * size) + x] = 0x01;
        }
      }
    }
  }
  return best_pattern;
}
```