user: Please show me the C implementation that matches the assembly code listed below:

```asm
<sift3B>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %edx,%r13d
  movsd  %xmm0,0x8(%rsp)
  test   %rdi,%rdi
  setne  %dil
  movzbl %dil,%edi
  call   <assert@plt>
  test   %rbp,%rbp
  setne  %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <strlen@plt>
  mov    %eax,%r12d
  mov    %rbp,%rdi
  call   <strlen@plt>
  mov    %eax,%ecx
  test   %r12d,%r12d
  je     L136
  test   %eax,%eax
  je     L41
  mov    $0x0,%edx
  mov    $0x0,%eax
  mov    $0x0,%r10d
  movsd  D19(%rip),%xmm2
  jmp    L87
L136:
  mov    %eax,%ecx
  pxor   %xmm0,%xmm0
  cvtsi2sd %rcx,%xmm0
L182:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L41:
  mov    %r12d,%r12d
  pxor   %xmm0,%xmm0
  cvtsi2sd %r12,%xmm0
  jmp    L182
L155:
  cmp    %eax,%edx
  cmova  %eax,%edx
  test   %r13d,%r13d
  je     L121
  lea    (%rdx,%r13,1),%r8d
  mov    %edx,%eax
  mov    %edx,%esi
  lea    0x1(%rdx),%edi
  jmp    L88
L131:
  add    $0x1,%eax
  cmp    %eax,%r8d
  je     L111
L88:
  cmp    %eax,%r12d
  jbe    L184
  mov    %eax,%r9d
  movzbl 0x0(%rbp,%rsi,1),%r11d
  cmp    %r11b,(%rbx,%r9,1)
  je     L192
L184:
  cmp    %ecx,%edi
  jae    L131
  mov    %eax,%r9d
  movzbl (%rbx,%rsi,1),%r11d
  cmp    %r11b,0x0(%rbp,%r9,1)
  jne    L131
  mov    %eax,%esi
  mov    %edx,%eax
  mov    %esi,%edx
  jmp    L192
L111:
  mov    %edx,%eax
L192:
  add    $0x1,%eax
  add    $0x1,%edx
  mov    %r10d,%esi
  pxor   %xmm1,%xmm1
  cvtsi2sd %rsi,%xmm1
  lea    (%rax,%rdx,1),%esi
  pxor   %xmm0,%xmm0
  cvtsi2sd %rsi,%xmm0
  divsd  %xmm2,%xmm0
  subsd  %xmm1,%xmm0
  comisd 0x8(%rsp),%xmm0
  jae    L193
  cmp    %eax,%r12d
  jbe    L53
  cmp    %edx,%ecx
  jbe    L53
L87:
  mov    %eax,%esi
  mov    %edx,%edi
  movzbl 0x0(%rbp,%rdi,1),%edi
  cmp    %dil,(%rbx,%rsi,1)
  jne    L155
  add    $0x1,%r10d
  jmp    L192
L121:
  mov    %edx,%eax
  jmp    L192
L193:
  cvttsd2si %xmm0,%rdi
  call   <round@plt>
  jmp    L182
L53:
  lea    (%r12,%rcx,1),%eax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  divsd  D19(%rip),%xmm0
  subsd  %xmm1,%xmm0
  cvttsd2si %xmm0,%rdi
  call   <round@plt>
  jmp    L182
```

tool_calls: name: retrieve_data
arguments: data_tag: D19
data_type: f64

tool: D19: 1.5

assistant: ```c
double sift3B(const char *str1, const char *str2, unsigned max_offset, double max_dist) {
  assert(str1 != NULL);
  assert(str2 != NULL);
  unsigned str1_len = strlen(str1);
  unsigned str2_len = strlen(str2);
  if (str1_len == 0) {
    return (double)str2_len;
  }
  if (str2_len == 0) {
    return (double)str1_len;
  }
  unsigned lcs = 0;
  unsigned c1 = 0;
  unsigned c2 = 0;
  double temp_dist;
  while ((c1 < str1_len) && (c2 < str2_len)) {
    if (((str1[c1]) == (str2[c2]))) {
      lcs++;
    } else {
      if (c1 < c2) {
        c2 = c1;
      } else {
        c1 = c2;
      }
      for (unsigned i = 0; i < max_offset; i++) {
        if ((c1 + i < str1_len) && (((str1[c1 + i]) == (str2[c2])))) {
          c1 += i;
          break;
        }
        if ((c2 + 1 < str2_len) && (((str2[c2 + i]) == (str1[c1])))) {
          c2 += i;
          break;
        }
      }
    }
    c1++;
    c2++;
    temp_dist = (c1 + c2) / 1.5 - lcs;
    if (temp_dist >= max_dist) {
      return round(temp_dist);
    }
  }
  return round((str1_len + str2_len) / 1.5 - lcs);
}
```