/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/assert.h"
#include "libc/calls/struct/iovec.h"
#include "libc/macros.internal.h"
#include "libc/sock/internal.h"
#include "libc/sysv/consts/iov.h"

/**
 * Converts I/O vector from System Five to WIN32 ABI.
 *
 * @return effective iovlen
 * @see IOV_MAX
 */
textwindows size_t __iovec2nt(struct NtIovec iovnt[hasatleast 16],
                              const struct iovec *iov, size_t iovlen) {
  size_t i, limit;
  for (limit = 0x7ffff000, i = 0; i < MIN(16, iovlen); ++i) {
    iovnt[i].buf = iov[i].iov_base;
    if (iov[i].iov_len < limit) {
      limit -= (iovnt[i].len = iov[i].iov_len);
    } else {
      iovnt[i].len = limit;
      break;
    }
  }
  return i;
}
