user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<caf_shash_elf>:
  endbr64
  mov    %rdi,%r10
  mov    %esi,%r9d
  test   %rdi,%rdi
  je     L78
  test   %esi,%esi
  jle    L78
  cmp    $0x3,%esi
  jle    L71
  sar    $0x2,%esi
  mov    %rdi,%rdx
  movslq %esi,%rax
  lea    (%rdi,%rax,4),%r8
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L119:
  shl    $0x4,%eax
  add    (%rdx),%eax
  mov    %eax,%ecx
  and    $0xf0000000,%ecx
  je     L123
  mov    %ecx,%edi
  not    %ecx
  add    $0x4,%rdx
  sar    $0x18,%edi
  xor    %eax,%edi
  mov    %ecx,%eax
  and    %edi,%eax
  cmp    %r8,%rdx
  jne    L119
L68:
  mov    %r9d,%ecx
  and    $0x3,%ecx
  je     L2
  lea    0x0(,%rsi,4),%edx
  mov    %r9d,%edi
  movslq %edx,%rdx
  sub    %ecx,%edi
  add    %r10,%rdx
  cmp    %edi,%r9d
  jle    L2
  lea    -0x1(%r9),%esi
  sub    %edi,%esi
  lea    0x1(%rdx,%rsi,1),%rdi
  nopl   0x0(%rax,%rax,1)
L65:
  movsbl (%rdx),%ecx
  shl    $0x4,%eax
  add    %ecx,%eax
  mov    %eax,%ecx
  and    $0xf0000000,%ecx
  je     L109
  mov    %ecx,%esi
  not    %ecx
  add    $0x1,%rdx
  sar    $0x18,%esi
  xor    %eax,%esi
  mov    %ecx,%eax
  and    %esi,%eax
  cmp    %rdi,%rdx
  jne    L65
  ret
  nopl   (%rax)
L78:
  xor    %eax,%eax
L2:
  ret
  nopl   0x0(%rax,%rax,1)
L71:
  movsbl (%rdi),%edx
  mov    %edx,%eax
  and    $0xf0000000,%eax
  mov    %eax,%ecx
  sar    $0x18,%ecx
  xor    %edx,%ecx
  test   %eax,%eax
  not    %eax
  cmovne %ecx,%edx
  and    %edx,%eax
  cmp    $0x1,%esi
  je     L2
  movsbl 0x1(%rdi),%edx
  shl    $0x4,%eax
  add    %eax,%edx
  mov    %edx,%eax
  and    $0xf0000000,%eax
  mov    %eax,%ecx
  sar    $0x18,%ecx
  xor    %edx,%ecx
  test   %eax,%eax
  not    %eax
  cmovne %ecx,%edx
  and    %edx,%eax
  cmp    $0x3,%esi
  jne    L2
  movsbl 0x2(%rdi),%edx
  shl    $0x4,%eax
  add    %eax,%edx
  mov    %edx,%eax
  and    $0xf0000000,%eax
  mov    %eax,%ecx
  sar    $0x18,%ecx
  xor    %edx,%ecx
  test   %eax,%eax
  not    %eax
  cmovne %ecx,%edx
  and    %edx,%eax
  ret
  nopl   (%rax)
L123:
  add    $0x4,%rdx
  cmp    %r8,%rdx
  jne    L119
  jmp    L68
  nopw   0x0(%rax,%rax,1)
L109:
  add    $0x1,%rdx
  cmp    %rdx,%rdi
  jne    L65
  ret
```

assistant: ```c
u_int caf_shash_elf(const char *str, const u_int len) {
  u_int32_t hash = 0;
  u_int32_t x = 0;
  u_int32_t i = 0;
  u_int32_t i32b = 0;
  u_int32_t *i32p = (u_int32_t *)NULL;
  char *ptr = (char *)str;
  if (ptr != (const char *)NULL && len > 0) {
    i32b = len / 4;
    if (i32b > 0) {
      i32p = (u_int32_t *)ptr;
      for (i = 0; i < i32b; i32p++, i++) {
        hash = (hash << 4) + (u_int32_t)(*i32p);
        if ((x = hash & 0xF0000000L) != 0) {
          hash ^= (x >> 24);
        }
        hash &= ~x;
      }
      if ((len % 4) > 0) {
        i32b *= 4;
        ptr = (char *)((size_t)i32b + (size_t)ptr);
        for (i = (len - (len % 4)); i < len; ptr++, i++) {
          hash = (hash << 4) + (u_int32_t)(*ptr);
          if ((x = hash & 0xF0000000L) != 0) {
            hash ^= (x >> 24);
          }
          hash &= ~x;
        }
      }
    } else {
      for (i = 0; i < len; ptr++, i++) {
        hash = (hash << 4) + (u_int32_t)(*ptr);
        if ((x = hash & 0xF0000000L) != 0) {
          hash ^= (x >> 24);
        }
        hash &= ~x;
      }
    }
    return hash;
  }
  return 0;
}
```