user: 请将以下的汇编代码转换成C语言代码:

```asm
<uncompress_location_positions>:
  endbr64
  push   %r15
  mov    %esi,%r15d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rcx,%rbx
  sub    $0x28,%rsp
  mov    (%rdi),%rcx
  mov    %rdi,(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  mov    %rcx,0x10(%rsp)
  test   %sil,%sil
  js     L189
  movzbl %sil,%r15d
  shl    $0x8,%r15d
  or     $0x1,%r15d
  mov    %r15d,(%rbx)
L61:
  mov    (%rsp),%rax
  mov    %rcx,(%rax)
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L3
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L189:
  mov    %esi,%eax
  mov    %edx,%r13d
  and    $0x60,%eax
  je     L66
  cmp    $0x20,%al
  je     L90
  cmp    $0x40,%al
  je     L225
  lea    0x1(%rcx),%rax
  mov    $0x60,%r12d
  mov    %rax,0x10(%rsp)
  movzbl (%rcx),%ebp
  jmp    L13
  cs nopw 0x0(%rax,%rax,1)
L66:
  xor    %ebp,%ebp
  xor    %r12d,%r12d
L13:
  lea    0x10(%rsp),%r14
  mov    %r14,%rdi
  call   <uncompress2@plt>
  and    $0x10,%r15d
  mov    %eax,(%rbx)
  jne    L161
  cmp    $0x1,%r13d
  jle    L78
  lea    -0x2(%r13),%eax
  lea    0x4(%rbx),%r15
  lea    0x8(%rbx,%rax,4),%rax
  mov    %rax,0x8(%rsp)
  nopw   0x0(%rax,%rax,1)
L119:
  mov    %r14,%rdi
  add    $0x4,%r15
  call   <uncompress2@plt>
  mov    %eax,-0x4(%r15)
  cmp    %r15,0x8(%rsp)
  jne    L119
  mov    0x10(%rsp),%rcx
L71:
  mov    $0x1,%eax
  nopl   0x0(%rax)
L23:
  mov    -0x4(%rbx,%rax,4),%edx
  add    %edx,(%rbx,%rax,4)
  add    $0x1,%rax
  cmp    %eax,%r13d
  jg     L23
L167:
  xor    %edx,%edx
  nopw   0x0(%rax,%rax,1)
L83:
  test   %r12d,%r12d
  jne    L179
  lea    0x1(%rcx),%rax
  mov    %rax,0x10(%rsp)
  movzbl (%rcx),%ebp
  mov    %rax,%rcx
L179:
  mov    (%rbx,%rdx,4),%eax
  shl    $0x8,%eax
  or     %ebp,%eax
  mov    %eax,(%rbx,%rdx,4)
  add    $0x1,%rdx
  cmp    %edx,%r13d
  jg     L83
  jmp    L61
  nopl   (%rax)
L161:
  mov    0x10(%rsp),%rcx
  cmp    $0x1,%r13d
  jle    L214
  lea    -0x1(%r13),%edi
  xor    %eax,%eax
  jmp    L171
  nopl   0x0(%rax,%rax,1)
L215:
  and    $0xf,%edx
  mov    %edx,0x4(%rbx,%rax,4)
  add    $0x1,%rax
  cmp    %rax,%rdi
  je     L153
L171:
  mov    %eax,%edx
  sar    %edx
  movslq %edx,%rdx
  movzbl (%rcx,%rdx,1),%edx
  test   $0x1,%al
  jne    L215
  shr    $0x4,%dl
  movzbl %dl,%edx
  mov    %edx,0x4(%rbx,%rax,4)
  add    $0x1,%rax
  cmp    %rax,%rdi
  jne    L171
L153:
  mov    %r13d,%eax
  sar    %eax
  cltq
  add    %rax,%rcx
  jmp    L71
  nopl   0x0(%rax)
L225:
  mov    $0x9,%ebp
  mov    $0x60,%r12d
  jmp    L13
L90:
  mov    $0x1,%ebp
  mov    $0x60,%r12d
  jmp    L13
L78:
  mov    0x10(%rsp),%rcx
L214:
  test   %r13d,%r13d
  jle    L61
  jmp    L167
L3:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void uncompress_location_positions(unsigned char **buf, unsigned char flag, int frequency, unsigned int *posdata) {
  int i, j, tmp;
  unsigned char *p = *buf;
  int common_structure = 0;
  int structure = 0;
  if (!(flag & 0x80)) {
    structure = (1 << 0);
    posdata[0] = ((unsigned int)((unsigned int)((int)(flag)) << (unsigned int)8 | (unsigned int)(structure)));
  } else {
    if ((tmp = (flag & 0x60))) {
      common_structure = 0x60;
      switch (tmp) {
      case 0x20:
        structure = (1 << 0);
        break;
      case 0x40:
        structure = (1 << 0) | (1 << 3);
        break;
      default:
        structure = (int)((unsigned char)*p++);
        break;
      }
    }
    posdata[0] = (unsigned int)uncompress2(&p);
    if (flag & 0x10) {
      for (i = 1, j = 0; i < frequency; i++, j++) {
        if (j % 2)
          posdata[i] = (unsigned int)((unsigned int)p[j / 2] & (unsigned int)0x0F);
        else
          posdata[i] = (unsigned int)((unsigned int)p[j / 2] >> (unsigned int)4);
      }
      p += ((j + 1) / 2);
    } else {
      for (i = 1; i < frequency; i++) {
        tmp = uncompress2(&p);
        posdata[i] = (unsigned int)tmp;
      }
    }
    for (i = 1; i < frequency; i++)
      posdata[i] += posdata[i - 1];
    for (i = 0; i < frequency; i++) {
      if (!common_structure)
        structure = (int)((unsigned char)*p++);
      posdata[i] = ((unsigned int)((unsigned int)(posdata[i]) << (unsigned int)8 | (unsigned int)(structure)));
    }
  }
  *buf = p;
}
```