user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<myrealpath>:
  endbr64
  push   %r15
  mov    %rsi,%r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %edx,%ebp
  push   %rbx
  sub    $0x38,%rsp
  cmpb   $0x2f,(%rdi)
  jne    L116
  mov    D37(%rip),%rax
  movb   $0x2f,(%rsi)
  lea    0x1(%rdi),%r13
  lea    0x1(%rsi),%rbx
  mov    %rax,0x8(%rsp)
  mov    (%rax),%eax
  lea    0x1(%rax),%edi
  mov    %eax,0x14(%rsp)
  call   <malloc@plt>
  mov    %rax,%r14
  movzbl 0x1(%r12),%eax
  xor    %r12d,%r12d
  test   %al,%al
  je     L260
L230:
  xor    %r12d,%r12d
  xor    %edi,%edi
  sub    $0x2,%ebp
L73:
  cmp    $0x2f,%al
  je     L164
  cmp    $0x2e,%al
  je     L375
L203:
  movzbl 0x0(%r13),%eax
  test   %al,%al
  je     L174
  cmp    $0x2f,%al
  je     L174
  movslq %ebp,%rsi
  jmp    L249
  cs nopw 0x0(%rax,%rax,1)
L281:
  add    $0x1,%r13
  mov    %al,(%rbx)
  add    $0x1,%rbx
  movzbl 0x0(%r13),%eax
  test   %al,%al
  je     L174
  cmp    $0x2f,%al
  je     L174
L249:
  mov    %rbx,%rdx
  sub    %r15,%rdx
  cmp    %rdx,%rsi
  jge    L281
  mov    D29(%rip),%rax
  mov    (%rax),%rdx
  mov    D72(%rip),%rax
  mov    %rdx,(%rax)
L223:
  mov    %r14,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  xor    %eax,%eax
L19:
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L174:
  lea    0x1(%rdi),%eax
  mov    %eax,0x14(%rsp)
  cmp    $0x100,%edi
  jg     L271
  mov    0x8(%rsp),%rax
  movb   $0x0,(%rbx)
  mov    %r14,%rsi
  mov    %r15,%rdi
  mov    (%rax),%edx
  call   <readlink@plt>
  mov    %eax,%edx
  test   %eax,%eax
  js     L110
  cltq
  mov    %r15,%r10
  movb   $0x0,(%r14,%rax,1)
  cmpb   $0x2f,(%r14)
  mov    %rax,0x18(%rsp)
  jne    L305
L113:
  mov    %r13,%rdi
  mov    %edx,0x24(%rsp)
  mov    %r10,0x28(%rsp)
  call   <strlen@plt>
  mov    0x24(%rsp),%edx
  mov    %eax,0x20(%rsp)
  lea    0x1(%rdx,%rax,1),%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L223
  mov    0x24(%rsp),%edx
  mov    %r14,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    0x20(%rsp),%edx
  mov    0x18(%rsp),%rdi
  mov    %r13,%rsi
  mov    %rbx,%r13
  add    $0x1,%edx
  add    %rbx,%rdi
  call   <memcpy@plt>
  mov    %r12,%rdi
  mov    %rbx,%r12
  call   <free@plt>
  mov    0x28(%rsp),%r10
L10:
  movb   $0x2f,(%r10)
  mov    0x14(%rsp),%edi
  lea    0x1(%r10),%rbx
  movzbl 0x0(%r13),%eax
  jmp    L376
  nopl   (%rax)
L375:
  movzbl 0x1(%r13),%eax
  test   %al,%al
  je     L30
  cmp    $0x2f,%al
  je     L30
  cmp    $0x2e,%al
  jne    L203
  movzbl 0x2(%r13),%eax
  test   %al,%al
  je     L34
  cmp    $0x2f,%al
  jne    L203
L34:
  add    $0x2,%r13
  lea    0x1(%r15),%rdx
  jmp    L219
L326:
  sub    $0x1,%rbx
  cmpb   $0x2f,-0x1(%rbx)
  je     L376
L219:
  cmp    %rdx,%rbx
  ja     L326
  jmp    L376
  nopl   0x0(%rax)
L164:
  movzbl 0x1(%r13),%eax
  add    $0x1,%r13
L376:
  test   %al,%al
  jne    L73
L161:
  lea    0x1(%r15),%rax
  cmp    %rax,%rbx
  je     L260
  xor    %eax,%eax
  cmpb   $0x2f,-0x1(%rbx)
  sete   %al
  sub    %rax,%rbx
L260:
  movb   $0x0,(%rbx)
  mov    %r14,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    %r15,%rax
  jmp    L19
  nopl   0x0(%rax)
L305:
  sub    $0x1,%rbx
  cmpb   $0x2f,(%rbx)
  jne    L305
  mov    %rbx,%r10
  jmp    L113
  nopl   0x0(%rax)
L110:
  mov    D15(%rip),%rax
  mov    D72(%rip),%rdx
  mov    (%rax),%rax
  cmp    %rax,(%rdx)
  jne    L223
  mov    %rbx,%r10
  jmp    L10
  nopw   0x0(%rax,%rax,1)
L30:
  add    $0x1,%r13
  jmp    L376
  nopl   0x0(%rax)
L116:
  lea    -0x2(%rdx),%esi
  mov    %r15,%rdi
  call   <getcwd@plt>
  mov    %eax,%r8d
  xor    %eax,%eax
  test   %r8d,%r8d
  je     L19
  mov    %r15,%rdi
  call   <strlen@plt>
  movslq %eax,%rbx
  add    %r15,%rbx
  cmpb   $0x2f,-0x1(%rbx)
  je     L79
  movb   $0x2f,(%rbx)
  add    $0x1,%rbx
L79:
  mov    D37(%rip),%rax
  mov    %rax,0x8(%rsp)
  mov    (%rax),%eax
  lea    0x1(%rax),%edi
  mov    %eax,0x14(%rsp)
  call   <malloc@plt>
  mov    %rax,%r14
  movzbl (%r12),%eax
  test   %al,%al
  je     L178
  mov    %r12,%r13
  jmp    L230
L271:
  mov    D19(%rip),%rax
  mov    (%rax),%rdx
  mov    D72(%rip),%rax
  mov    %rdx,(%rax)
  jmp    L223
L178:
  xor    %r12d,%r12d
  jmp    L161
```

assistant: ```c
char *myrealpath(const char *path, char *resolved_path, int maxreslth) {
  int readlinks = 0;
  char *npath;
  char *link_path;
  int n;
  char *buf = NULL;
  npath = resolved_path;
  if (*path != '/') {
    if (!getcwd(npath, maxreslth - 2))
      return NULL;
    npath += strlen(npath);
    if (npath[-1] != '/')
      *npath++ = '/';
  } else {
    *npath++ = '/';
    path++;
  }
  link_path = malloc(PATH_MAX + 1);
  while (*path != '\0') {
    if (*path == '/') {
      path++;
      continue;
    }
    if (*path == '.' && (path[1] == '\0' || path[1] == '/')) {
      path++;
      continue;
    }
    if (*path == '.' && path[1] == '.' && (path[2] == '\0' || path[2] == '/')) {
      path += 2;
      while (npath > resolved_path + 1 && (--npath)[-1] != '/')
        ;
      continue;
    }
    while (*path != '\0' && *path != '/') {
      if (npath - resolved_path > maxreslth - 2) {
        errno = ENAMETOOLONG;
        goto err;
      }
      *npath++ = *path++;
    }
    if (readlinks++ > 256) {
      errno = ELOOP;
      goto err;
    }
    *npath = '\0';
    n = readlink(resolved_path, link_path, PATH_MAX);
    if (n < 0) {
      if (errno != EINVAL)
        goto err;
    } else {
      int m;
      char *newbuf;
      link_path[n] = '\0';
      if (*link_path == '/')
        npath = resolved_path;
      else
        while (*(--npath) != '/')
          ;
      m = strlen(path);
      newbuf = malloc(m + n + 1);
      if (!newbuf)
        goto err;
      memcpy(newbuf, link_path, n);
      memcpy(newbuf + n, path, m + 1);
      free(buf);
      path = buf = newbuf;
    }
    *npath++ = '/';
  }
  if (npath != resolved_path + 1 && npath[-1] == '/')
    npath--;
  *npath = '\0';
  free(link_path);
  free(buf);
  return resolved_path;
err:
  free(link_path);
  free(buf);
  return NULL;
}
```