user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<rpmvercmp>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,%r13
  mov    %rsi,%r14
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L84
L526:
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  jne    L205
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L84:
  mov    %r13,%rdi
  call   <strlen@plt>
  add    $0x18,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffffff0,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rdx
  sub    %rax,%rdx
L43:
  cmp    %rdx,%rsp
  je     L269
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L43
L269:
  mov    %rcx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L252
  orq    $0x0,-0x8(%rsp,%rax,1)
L252:
  lea    0xf(%rsp),%r15
  and    $0xfffffffffffffff0,%r15
  mov    %r15,%rbx
  mov    %r14,%rdi
  call   <strlen@plt>
  add    $0x18,%rax
  mov    %rax,%rdx
  and    $0xfffffffffffffff0,%rdx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L533:
  cmp    %rcx,%rsp
  je     L89
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L533
L89:
  mov    %rdx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L303
  orq    $0x0,-0x8(%rsp,%rax,1)
L303:
  lea    0xf(%rsp),%rax
  and    $0xfffffffffffffff0,%rax
  mov    %rax,-0x48(%rbp)
  mov    %rax,%r12
  mov    %r13,%rsi
  mov    %r15,%rdi
  call   <strcpy@plt>
  mov    %r14,%rsi
  mov    -0x48(%rbp),%rdi
  call   <strcpy@plt>
  movzbl (%r15),%r15d
  test   %r15b,%r15b
  jne    L256
L79:
  movzbl (%r12),%eax
  neg    %al
  sbb    %eax,%eax
  jmp    L526
L295:
  movzbl (%rbx),%edi
  mov    %rbx,%r13
  test   %dil,%dil
  je     L492
L429:
  movsbl %dil,%edi
  call   <xisdigit@plt>
  test   %rax,%rax
  je     L492
  add    $0x1,%r13
  movzbl 0x0(%r13),%edi
  test   %dil,%dil
  jne    L429
L492:
  movzbl (%r12),%edi
  test   %dil,%dil
  je     L237
  mov    %r12,%r14
L277:
  movsbl %dil,%edi
  call   <xisdigit@plt>
  test   %rax,%rax
  je     L482
  add    $0x1,%r14
  movzbl (%r14),%edi
  test   %dil,%dil
  jne    L277
L482:
  movzbl 0x0(%r13),%r15d
  movb   $0x0,0x0(%r13)
  movzbl (%r14),%eax
  mov    %al,-0x51(%rbp)
  movb   $0x0,(%r14)
  cmp    %r14,%r12
  je     L542
  cmp    %rbx,%r13
  je     L542
  cmpb   $0x30,(%rbx)
  jne    L67
L37:
  add    $0x1,%rbx
  cmpb   $0x30,(%rbx)
  je     L37
  mov    %rbx,-0x48(%rbp)
L177:
  cmpb   $0x30,(%r12)
  jne    L161
L93:
  add    $0x1,%r12
  cmpb   $0x30,(%r12)
  je     L93
  mov    %r12,-0x50(%rbp)
L259:
  mov    -0x48(%rbp),%rdi
  call   <strlen@plt>
  mov    %rax,%rbx
  mov    -0x50(%rbp),%rdi
  call   <strlen@plt>
  cmp    %rax,%rbx
  jg     L131
  jl     L406
  mov    %r14,%r12
  mov    %r13,%rbx
  jmp    L72
L67:
  mov    %rbx,-0x48(%rbp)
  jmp    L177
L161:
  mov    %r12,-0x50(%rbp)
  jmp    L259
L131:
  mov    $0x1,%eax
  jmp    L526
L406:
  mov    $0xffffffff,%eax
  jmp    L526
L196:
  mov    $0xffffffff,%eax
  jmp    L526
L499:
  mov    $0x1,%eax
  jmp    L526
L253:
  mov    $0xffffffff,%eax
  jmp    L526
L542:
  mov    $0xffffffff,%eax
  jmp    L526
L359:
  test   %r15b,%r15b
  setne  %al
  movzbl %al,%eax
  jmp    L526
L237:
  mov    $0xffffffff,%eax
  jmp    L526
L353:
  movzbl 0x0(%r13),%r15d
  movb   $0x0,0x0(%r13)
  movzbl (%r14),%eax
  mov    %al,-0x51(%rbp)
  movb   $0x0,(%r14)
  cmp    %r12,%r14
  je     L253
  cmp    %rbx,%r13
  je     L253
  mov    %r12,-0x50(%rbp)
  mov    %r14,%r12
  mov    %rbx,-0x48(%rbp)
  mov    %r13,%rbx
L72:
  mov    -0x50(%rbp),%rsi
  mov    -0x48(%rbp),%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  js     L196
  jg     L499
  mov    %r15b,(%rbx)
  movzbl -0x51(%rbp),%eax
  mov    %al,(%r12)
  test   %r15b,%r15b
  je     L79
L256:
  movzbl (%r12),%eax
  test   %al,%al
  je     L359
  movzbl (%rbx),%edi
  test   %dil,%dil
  je     L223
L60:
  movsbl %dil,%edi
  call   <xisalnum@plt>
  test   %eax,%eax
  jne    L394
  add    $0x1,%rbx
  movzbl (%rbx),%edi
  test   %dil,%dil
  jne    L60
L394:
  movzbl (%r12),%eax
  test   %al,%al
  je     L449
L223:
  movsbl %al,%edi
  call   <xisalnum@plt>
  test   %eax,%eax
  jne    L449
  add    $0x1,%r12
  movzbl (%r12),%eax
  test   %al,%al
  jne    L223
L449:
  movsbl (%rbx),%edi
  call   <xisdigit@plt>
  test   %rax,%rax
  jne    L295
  movzbl (%rbx),%edi
  mov    %rbx,%r13
  test   %dil,%dil
  je     L148
L324:
  movsbl %dil,%edi
  call   <xisalpha@plt>
  test   %rax,%rax
  je     L148
  add    $0x1,%r13
  movzbl 0x0(%r13),%edi
  test   %dil,%dil
  jne    L324
L148:
  movzbl (%r12),%edi
  test   %dil,%dil
  je     L237
  mov    %r12,%r14
L116:
  movsbl %dil,%edi
  call   <xisalpha@plt>
  test   %rax,%rax
  je     L353
  add    $0x1,%r14
  movzbl (%r14),%edi
  test   %dil,%dil
  jne    L116
  jmp    L353
L205:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int rpmvercmp(const char *a, const char *b) {
  char oldch1, oldch2;
  char *str1, *str2;
  char *one, *two;
  int rc;
  int isnum;
  if (!strcmp(a, b))
    return 0;
  str1 = alloca(strlen(a) + 1);
  str2 = alloca(strlen(b) + 1);
  strcpy(str1, a);
  strcpy(str2, b);
  one = str1;
  two = str2;
  while (*one && *two) {
    while (*one && !xisalnum(*one))
      one++;
    while (*two && !xisalnum(*two))
      two++;
    str1 = one;
    str2 = two;
    if (xisdigit(*str1)) {
      while (*str1 && xisdigit(*str1))
        str1++;
      while (*str2 && xisdigit(*str2))
        str2++;
      isnum = 1;
    } else {
      while (*str1 && xisalpha(*str1))
        str1++;
      while (*str2 && xisalpha(*str2))
        str2++;
      isnum = 0;
    }
    oldch1 = *str1;
    *str1 = '\0';
    oldch2 = *str2;
    *str2 = '\0';
    if (one == str1)
      return -1;
    if (two == str2)
      return -1;
    if (isnum) {
      while (*one == '0')
        one++;
      while (*two == '0')
        two++;
      if (strlen(one) > strlen(two))
        return 1;
      if (strlen(two) > strlen(one))
        return -1;
    }
    rc = strcmp(one, two);
    if (rc < 0)
      return -1;
    else if (rc > 0)
      return 1;
    *str1 = oldch1;
    one = str1;
    *str2 = oldch2;
    two = str2;
  }
  if ((!*one) && (!*two))
    return 0;
  if (!*one)
    return -1;
  else
    return 1;
}
```