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

```asm
<myrealpath>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  movl   $0x0,-0x2c(%rbp)
  movq   $0x0,-0x18(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  je     L21
  mov    -0x44(%rbp),%eax
  lea    -0x2(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <getcwd@plt>
  test   %eax,%eax
  jne    L332
  mov    $0x0,%eax
  jmp    L140
L332:
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cltq
  add    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  sub    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  je     L217
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x2f,(%rax)
  jmp    L217
L21:
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x2f,(%rax)
  addq   $0x1,-0x38(%rbp)
L217:
  mov    D70(%rip),%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  jmp    L93
L125:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L314
  addq   $0x1,-0x38(%rbp)
  jmp    L93
L314:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L106
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L197
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L106
L197:
  addq   $0x1,-0x38(%rbp)
  jmp    L93
L106:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L288
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L288
  mov    -0x38(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L209
  mov    -0x38(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L288
L209:
  addq   $0x2,-0x38(%rbp)
  nop
L82:
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  cmp    %rax,-0x20(%rbp)
  jbe    L93
  subq   $0x1,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  sub    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L82
  jmp    L93
L191:
  mov    -0x20(%rbp),%rax
  sub    -0x40(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x44(%rbp),%eax
  sub    $0x2,%eax
  cltq
  cmp    %rax,%rdx
  jle    L222
  mov    D10(%rip),%rax
  mov    (%rax),%rdx
  mov    D17(%rip),%rax
  mov    %rdx,(%rax)
  jmp    L4
L222:
  mov    -0x38(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x20(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L288:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L156
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L191
L156:
  mov    -0x2c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x2c(%rbp)
  cmp    $0x100,%eax
  jle    L254
  mov    D20(%rip),%rax
  mov    (%rax),%rdx
  mov    D17(%rip),%rax
  mov    %rdx,(%rax)
  jmp    L4
L254:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  mov    D70(%rip),%rax
  mov    (%rax),%edx
  mov    -0x10(%rbp),%rcx
  mov    -0x40(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <readlink@plt>
  mov    %eax,-0x28(%rbp)
  cmpl   $0x0,-0x28(%rbp)
  jns    L146
  mov    D17(%rip),%rax
  mov    (%rax),%rdx
  mov    D66(%rip),%rax
  mov    (%rax),%rax
  cmp    %rax,%rdx
  je     L210
  jmp    L4
L146:
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L335
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  jmp    L196
L335:
  nop
L319:
  subq   $0x1,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L319
L196:
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  add    $0x1,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L226
  mov    -0x28(%rbp),%edx
  mov    -0x10(%rbp),%rcx
  mov    -0x8(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x24(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    -0x28(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x8(%rbp),%rax
  add    %rax,%rcx
  mov    -0x38(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memcpy@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x38(%rbp)
L210:
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x2f,(%rax)
L93:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L125
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  cmp    %rax,-0x20(%rbp)
  je     L242
  mov    -0x20(%rbp),%rax
  sub    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2f,%al
  jne    L242
  subq   $0x1,-0x20(%rbp)
L242:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x40(%rbp),%rax
  jmp    L140
L226:
  nop
L4:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
L140:
  leave
  ret
```

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;
}
```