user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<build_map>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  movl   $0x0,-0x30(%rbp)
  movl   $0x0,-0x2c(%rbp)
  movl   $0x0,-0x28(%rbp)
  movq   $0x0,-0x20(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  jne    L230
  mov    $0x0,%eax
  jmp    L82
L230:
  mov    D12(%rip),%rax
  test   %rax,%rax
  je     L84
  mov    D9(%rip),%edx
  mov    D12(%rip),%rcx
  mov    -0x48(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %eax,%eax
  jne    L84
  mov    D9(%rip),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  jmp    L82
L84:
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    $0x1,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,%esi
  mov    $0x5,%edi
  mov    $0x0,%eax
  call   <mem@plt>
  cltq
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  je     L63
  mov    -0x24(%rbp),%eax
  mov    %eax,%esi
  mov    $0x6,%edi
  mov    $0x0,%eax
  call   <mem@plt>
  cltq
  mov    %rax,D37(%rip)
  mov    D37(%rip),%rax
  test   %rax,%rax
  jne    L59
L63:
  mov    $0x0,%eax
  jmp    L82
L59:
  mov    D37(%rip),%rax
  movb   $0x0,(%rax)
  movzbl (%rax),%edx
  mov    -0x10(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x48(%rbp),%rdx
  mov    -0x10(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcat@plt>
  mov    D37(%rip),%rax
  mov    -0x48(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcat@plt>
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  jmp    L203
L40:
  cmpl   $0x0,-0x28(%rbp)
  je     L291
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  jne    L178
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movb   $0x5c,(%rax)
L178:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x30(%rbp),%edx
  lea    0x1(%rdx),%ecx
  mov    %ecx,-0x30(%rbp)
  movslq %edx,%rcx
  mov    -0x10(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  movl   $0x0,-0x28(%rbp)
  jmp    L203
L291:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x5c,%al
  jne    L107
  movl   $0x1,-0x28(%rbp)
  addq   $0x1,-0x18(%rbp)
  jmp    L203
L107:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x7d,%al
  jne    L272
  cmpl   $0x0,-0x2c(%rbp)
  jne    L279
  movl   $0x1,-0x2c(%rbp)
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addq   $0x1,-0x18(%rbp)
  jmp    L81
L233:
  addq   $0x1,-0x18(%rbp)
L81:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L233
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x9,%al
  je     L233
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x7b,%al
  je     L87
  mov    $0x0,%eax
  jmp    L82
L87:
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x20(%rbp)
  addq   $0x1,-0x18(%rbp)
  jmp    L203
L279:
  mov    -0x30(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x30(%rbp)
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addq   $0x1,-0x18(%rbp)
  movl   $0x2,-0x2c(%rbp)
  jmp    L41
L272:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x30(%rbp),%edx
  lea    0x1(%rdx),%ecx
  mov    %ecx,-0x30(%rbp)
  movslq %edx,%rcx
  mov    -0x10(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
L203:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L40
L41:
  cmpl   $0x2,-0x2c(%rbp)
  je     L224
  mov    $0x0,%eax
  jmp    L82
L224:
  mov    -0x18(%rbp),%rax
  sub    -0x10(%rbp),%rax
  mov    %eax,D37(%rip)
  movl   $0x0,-0x30(%rbp)
  jmp    L194
L187:
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    -0x30(%rbp),%edx
  mov    %dl,(%rax)
  addl   $0x1,-0x30(%rbp)
L194:
  cmpl   $0xff,-0x30(%rbp)
  jle    L187
  mov    -0x8(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <nextch@plt>
  mov    -0x20(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <nextch@plt>
  jmp    L113
L35:
  mov    $0x1,%esi
  mov    $0x0,%edi
  mov    $0x0,%eax
  call   <nextch@plt>
  mov    %eax,%edx
  movsbq -0x31(%rbp),%rcx
  mov    -0x50(%rbp),%rax
  add    %rcx,%rax
  mov    %dl,(%rax)
L113:
  mov    $0x0,%esi
  mov    $0x0,%edi
  mov    $0x0,%eax
  call   <nextch@plt>
  mov    %al,-0x31(%rbp)
  cmpb   $0x0,-0x31(%rbp)
  jne    L35
  mov    -0x18(%rbp),%rax
L82:
  leave
  ret
```

assistant: ```c
char *build_map(s, map)
char *s;
char *map;
{
  char *in;
  char *out;
  char *str;
  char *tmp;
  char c;
  int i = 0;
  int range_count = 0;
  int seenbs = 0;
  static char *last = 0;
  static int last_len;
  out = 0;
  if (!s) {
    return 0;
  }
  if (last && !strncmp(s, last, last_len)) {
    return s + last_len;
  } else {
    int len = strlen(s) + 1;
    if (!(str = mem(5, len)) || !(last = mem(6, len))) {
      return 0;
    }
    str[0] = last[0] = '\0';
    strcat(str, s);
    strcat(last, s);
  }
  tmp = str + 1;
  in = str;
  while (*tmp) {
    if (seenbs) {
      if (*tmp == '-') {
        str[i++] = '\\';
      }
      str[i++] = *tmp++;
      seenbs = 0;
    } else {
      if (*tmp == '\\') {
        seenbs = 1;
        tmp++;
      } else if (*tmp == '}') {
        if (!range_count) {
          range_count = 1;
          str[i++] = '\0';
          tmp++;
          while (*tmp == ' ' || *tmp == '\t') {
            tmp++;
          }
          if (*tmp != '{') {
            return 0;
          }
          out = str + i;
          tmp++;
        } else {
          str[i++] = '\0';
          tmp++;
          range_count = 2;
          break;
        }
      } else {
        str[i++] = *tmp++;
      }
    }
  }
  if (range_count != 2) {
    return 0;
  }
  last_len = tmp - str;
  for (i = 0; i < 1 << 8; i++) {
    map[i] = i;
  }
  (void)nextch(in, 0);
  (void)nextch(out, 1);
  while ((c = nextch((char *)0, 0))) {
    map[(int)c] = nextch((char *)0, 1);
  }
  return tmp;
}
```