user: 这段汇编代码用C语言表示是什么样的：

```asm
<scan_env>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,%rbp
  mov    %rcx,0x8(%rsp)
  movq   $0xffffffffffffffff,(%r9)
  movq   $0xffffffffffffffff,(%r8)
  movq   $0xffffffffffffffff,(%rcx)
  movq   $0xffffffffffffffff,(%rdx)
  movq   $0xffffffffffffffff,(%rsi)
  mov    (%rdi),%rdi
  test   %rdi,%rdi
  je     L98
  mov    %rsi,%r12
  mov    %rdx,%r15
  mov    %r8,%r13
  mov    %r9,%r14
  mov    $0x0,%ebx
  jmp    L38
L55:
  mov    $0xc,%edx
  lea    D10(%rip),%rsi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L128
  mov    %rbx,(%r12)
L2:
  add    $0x1,%rbx
  mov    0x0(%rbp,%rbx,8),%rdi
  test   %rdi,%rdi
  je     L47
L38:
  cmpq   $0xffffffffffffffff,(%r12)
  jne    L55
L128:
  cmpq   $0xffffffffffffffff,0x0(%r13)
  jne    L83
L97:
  cmpq   $0xffffffffffffffff,(%r14)
  jne    L65
L41:
  cmpq   $0xffffffffffffffff,(%r15)
  jne    L90
L14:
  mov    0x8(%rsp),%rax
  cmpq   $0xffffffffffffffff,(%rax)
  je     L2
  mov    0x0(%rbp,%rbx,8),%rdi
  mov    $0x1b,%edx
  lea    D25(%rip),%rsi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L2
  mov    0x8(%rsp),%rax
  mov    %rbx,(%rax)
  jmp    L2
L83:
  mov    0x0(%rbp,%rbx,8),%rdi
  mov    $0x12,%edx
  lea    D15(%rip),%rsi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L97
  mov    %rbx,0x0(%r13)
  jmp    L2
L65:
  mov    0x0(%rbp,%rbx,8),%rdi
  mov    $0x11,%edx
  lea    D7(%rip),%rsi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L41
  mov    %rbx,(%r14)
  jmp    L2
L90:
  mov    0x0(%rbp,%rbx,8),%rdi
  mov    $0x17,%edx
  lea    D13(%rip),%rsi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L14
  mov    %rbx,(%r15)
  jmp    L2
L98:
  mov    $0x0,%ebx
L47:
  mov    %rbx,%rax
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: disassemble_data
arguments: tag: D10
type_infered: string
name: disassemble_data
arguments: tag: D25
type_infered: string
name: disassemble_data
arguments: tag: D15
type_infered: string
name: disassemble_data
arguments: tag: D7
type_infered: string
name: disassemble_data
arguments: tag: D13
type_infered: string

tool: D10: LD_PRELOAD=

tool: D25: DYLD_FORCE_FLAT_NAMESPACE=

tool: D15: BUILDSH_TEMPFILE=

tool: D7: BUILDSH_PRELOAD=

tool: D13: DYLD_INSERT_LIBRARIES=

assistant: ```c
size_t scan_env(char *const *env, size_t *ldp_pos, size_t *dil_pos, size_t *dffns_pos, size_t *lmtf_pos, size_t *lmpl_pos) {
  size_t n = 0;
  *ldp_pos = *dil_pos = *dffns_pos = *lmtf_pos = *lmpl_pos = -1;
  while (env[n] != NULL) {
    if (*ldp_pos != (size_t)-1 && !strncmp(env[n], "LD_PRELOAD=", sizeof("LD_PRELOAD=")))
      *ldp_pos = n;
    else if (*lmtf_pos != (size_t)-1 && !strncmp(env[n], "BUILDSH_TEMPFILE=", sizeof("BUILDSH_TEMPFILE=")))
      *lmtf_pos = n;
    else if (*lmpl_pos != (size_t)-1 && !strncmp(env[n], "BUILDSH_PRELOAD=", sizeof("BUILDSH_PRELOAD=")))
      *lmpl_pos = n;
    else if (*dil_pos != (size_t)-1 && !strncmp(env[n], "DYLD_INSERT_LIBRARIES=", sizeof("DYLD_INSERT_LIBRARIES=")))
      *dil_pos = n;
    else if (*dffns_pos != (size_t)-1 && !strncmp(env[n], "DYLD_FORCE_FLAT_NAMESPACE=", sizeof("DYLD_FORCE_FLAT_NAMESPACE=")))
      *dffns_pos = n;
    ++n;
  }
  return n;
}
```