/* Copyright (c) 2015, Google Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#include "test_util.h"

#include <ostream>

#include <openssl/err.h>

#include "../internal.h"


void hexdump(FILE *fp, const char *msg, const void *in, size_t len) {
  const uint8_t *data = reinterpret_cast<const uint8_t*>(in);

  fputs(msg, fp);
  for (size_t i = 0; i < len; i++) {
    fprintf(fp, "%02x", data[i]);
  }
  fputs("\n", fp);
}

std::ostream &operator<<(std::ostream &os, const Bytes &in) {
  if (in.span_.empty()) {
    return os << "<empty Bytes>";
  }

  // Print a byte slice as hex.
  os << EncodeHex(in.span_);
  return os;
}

bool DecodeHex(std::vector<uint8_t> *out, const std::string &in) {
  out->clear();
  if (in.size() % 2 != 0) {
    return false;
  }
  out->reserve(in.size() / 2);
  for (size_t i = 0; i < in.size(); i += 2) {
    uint8_t hi, lo;
    if (!OPENSSL_fromxdigit(&hi, in[i]) ||
        !OPENSSL_fromxdigit(&lo, in[i + 1])) {
      return false;
    }
    out->push_back((hi << 4) | lo);
  }
  return true;
}

std::string EncodeHex(bssl::Span<const uint8_t> in) {
  static const char kHexDigits[] = "0123456789abcdef";
  std::string ret;
  ret.reserve(in.size() * 2);
  for (uint8_t b : in) {
    ret += kHexDigits[b >> 4];
    ret += kHexDigits[b & 0xf];
  }
  return ret;
}

testing::AssertionResult ErrorEquals(uint32_t err, int lib, int reason) {
  if (ERR_GET_LIB(err) == lib && ERR_GET_REASON(err) == reason) {
    return testing::AssertionSuccess();
  }

  char buf[128], expected[128];
  return testing::AssertionFailure()
         << "Got \"" << ERR_error_string_n(err, buf, sizeof(buf))
         << "\", wanted \""
         << ERR_error_string_n(ERR_PACK(lib, reason), expected,
                               sizeof(expected))
         << "\"";
}