// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
 * Copyright 2006 Jeremias Maerki in part, and ZXing Authors in part
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "xfa/src/fxbarcode/barcode.h"
#include "BC_PDF417ErrorCorrection.h"
int32_t CBC_PDF417ErrorCorrection::EC_COEFFICIENTS[][2500] = {
    {27, 917},
    {522, 568, 723, 809},
    {237, 308, 436, 284, 646, 653, 428, 379},
    {274, 562, 232, 755, 599, 524, 801, 132, 295, 116, 442, 428, 295, 42, 176,
     65},
    {361, 575, 922, 525, 176, 586, 640, 321, 536, 742, 677, 742, 687, 284, 193,
     517, 273, 494, 263, 147, 593, 800, 571, 320, 803, 133, 231, 390, 685, 330,
     63, 410},
    {539, 422, 6, 93, 862, 771, 453, 106, 610, 287, 107, 505, 733, 877, 381,
     612, 723, 476, 462, 172, 430, 609, 858, 822, 543, 376, 511, 400, 672, 762,
     283, 184, 440, 35, 519, 31, 460, 594, 225, 535, 517, 352, 605, 158, 651,
     201, 488, 502, 648, 733, 717, 83, 404, 97, 280, 771, 840, 629, 4, 381, 843,
     623, 264, 543},
    {521, 310, 864, 547, 858, 580, 296, 379, 53, 779, 897, 444, 400, 925, 749,
     415, 822, 93, 217, 208, 928, 244, 583, 620, 246, 148, 447, 631, 292, 908,
     490, 704, 516, 258, 457, 907, 594, 723, 674, 292, 272, 96, 684, 432, 686,
     606, 860, 569, 193, 219, 129, 186, 236, 287, 192, 775, 278, 173, 40, 379,
     712, 463, 646, 776, 171, 491, 297, 763, 156, 732, 95, 270, 447, 90, 507,
     48, 228, 821, 808, 898, 784, 663, 627, 378, 382, 262, 380, 602, 754, 336,
     89, 614, 87, 432, 670, 616, 157, 374, 242, 726, 600, 269, 375, 898, 845,
     454, 354, 130, 814, 587, 804, 34, 211, 330, 539, 297, 827, 865, 37, 517,
     834, 315, 550, 86, 801, 4, 108, 539},
    {524, 894, 75, 766, 882, 857, 74, 204, 82, 586, 708, 250, 905, 786, 138,
     720, 858, 194, 311, 913, 275, 190, 375, 850, 438, 733, 194, 280, 201, 280,
     828, 757, 710, 814, 919, 89, 68, 569, 11, 204, 796, 605, 540, 913, 801,
     700, 799, 137, 439, 418, 592, 668, 353, 859, 370, 694, 325, 240, 216, 257,
     284, 549, 209, 884, 315, 70, 329, 793, 490, 274, 877, 162, 749, 812, 684,
     461, 334, 376, 849, 521, 307, 291, 803, 712, 19, 358, 399, 908, 103, 511,
     51, 8, 517, 225, 289, 470, 637, 731, 66, 255, 917, 269, 463, 830, 730, 433,
     848, 585, 136, 538, 906, 90, 2, 290, 743, 199, 655, 903, 329, 49, 802, 580,
     355, 588, 188, 462, 10, 134, 628, 320, 479, 130, 739, 71, 263, 318, 374,
     601, 192, 605, 142, 673, 687, 234, 722, 384, 177, 752, 607, 640, 455, 193,
     689, 707, 805, 641, 48, 60, 732, 621, 895, 544, 261, 852, 655, 309, 697,
     755, 756, 60, 231, 773, 434, 421, 726, 528, 503, 118, 49, 795, 32, 144,
     500, 238, 836, 394, 280, 566, 319, 9, 647, 550, 73, 914, 342, 126, 32, 681,
     331, 792, 620, 60, 609, 441, 180, 791, 893, 754, 605, 383, 228, 749, 760,
     213, 54, 297, 134, 54, 834, 299, 922, 191, 910, 532, 609, 829, 189, 20,
     167, 29, 872, 449, 83, 402, 41, 656, 505, 579, 481, 173, 404, 251, 688, 95,
     497, 555, 642, 543, 307, 159, 924, 558, 648, 55, 497, 10},
    {352, 77, 373, 504, 35, 599, 428, 207, 409, 574, 118, 498, 285, 380, 350,
     492, 197, 265, 920, 155, 914, 299, 229, 643, 294, 871, 306, 88, 87, 193,
     352, 781, 846, 75, 327, 520, 435, 543, 203, 666, 249, 346, 781, 621, 640,
     268, 794, 534, 539, 781, 408, 390, 644, 102, 476, 499, 290, 632, 545, 37,
     858, 916, 552, 41, 542, 289, 122, 272, 383, 800, 485, 98, 752, 472, 761,
     107, 784, 860, 658, 741, 290, 204, 681, 407, 855, 85, 99, 62, 482, 180, 20,
     297, 451, 593, 913, 142, 808, 684, 287, 536, 561, 76, 653, 899, 729, 567,
     744, 390, 513, 192, 516, 258, 240, 518, 794, 395, 768, 848, 51, 610, 384,
     168, 190, 826, 328, 596, 786, 303, 570, 381, 415, 641, 156, 237, 151, 429,
     531, 207, 676, 710, 89, 168, 304, 402, 40, 708, 575, 162, 864, 229, 65,
     861, 841, 512, 164, 477, 221, 92, 358, 785, 288, 357, 850, 836, 827, 736,
     707, 94, 8, 494, 114, 521, 2, 499, 851, 543, 152, 729, 771, 95, 248, 361,
     578, 323, 856, 797, 289, 51, 684, 466, 533, 820, 669, 45, 902, 452, 167,
     342, 244, 173, 35, 463, 651, 51, 699, 591, 452, 578, 37, 124, 298, 332,
     552, 43, 427, 119, 662, 777, 475, 850, 764, 364, 578, 911, 283, 711, 472,
     420, 245, 288, 594, 394, 511, 327, 589, 777, 699, 688, 43, 408, 842, 383,
     721, 521, 560, 644, 714, 559, 62, 145, 873, 663, 713, 159, 672, 729, 624,
     59, 193, 417, 158, 209, 563, 564, 343, 693, 109, 608, 563, 365, 181, 772,
     677, 310, 248, 353, 708, 410, 579, 870, 617, 841, 632, 860, 289, 536, 35,
     777, 618, 586, 424, 833, 77, 597, 346, 269, 757, 632, 695, 751, 331, 247,
     184, 45, 787, 680, 18, 66, 407, 369, 54, 492, 228, 613, 830, 922, 437, 519,
     644, 905, 789, 420, 305, 441, 207, 300, 892, 827, 141, 537, 381, 662, 513,
     56, 252, 341, 242, 797, 838, 837, 720, 224, 307, 631, 61, 87, 560, 310,
     756, 665, 397, 808, 851, 309, 473, 795, 378, 31, 647, 915, 459, 806, 590,
     731, 425, 216, 548, 249, 321, 881, 699, 535, 673, 782, 210, 815, 905, 303,
     843, 922, 281, 73, 469, 791, 660, 162, 498, 308, 155, 422, 907, 817, 187,
     62, 16, 425, 535, 336, 286, 437, 375, 273, 610, 296, 183, 923, 116, 667,
     751, 353, 62, 366, 691, 379, 687, 842, 37, 357, 720, 742, 330, 5, 39, 923,
     311, 424, 242, 749, 321, 54, 669, 316, 342, 299, 534, 105, 667, 488, 640,
     672, 576, 540, 316, 486, 721, 610, 46, 656, 447, 171, 616, 464, 190, 531,
     297, 321, 762, 752, 533, 175, 134, 14, 381, 433, 717, 45, 111, 20, 596,
     284, 736, 138, 646, 411, 877, 669, 141, 919, 45, 780, 407, 164, 332, 899,
     165, 726, 600, 325, 498, 655, 357, 752, 768, 223, 849, 647, 63, 310, 863,
     251, 366, 304, 282, 738, 675, 410, 389, 244, 31, 121, 303, 263}};
CBC_PDF417ErrorCorrection::CBC_PDF417ErrorCorrection() {}
CBC_PDF417ErrorCorrection::~CBC_PDF417ErrorCorrection() {}
int32_t CBC_PDF417ErrorCorrection::getErrorCorrectionCodewordCount(
    int32_t errorCorrectionLevel,
    int32_t& e) {
  if (errorCorrectionLevel < 0 || errorCorrectionLevel > 8) {
    e = BCExceptionErrorCorrectionLevelMustBeBetween0And8;
    return -1;
  }
  return 1 << (errorCorrectionLevel + 1);
}
int32_t CBC_PDF417ErrorCorrection::getRecommendedMinimumErrorCorrectionLevel(
    int32_t n,
    int32_t& e) {
  if (n <= 0) {
    e = BCExceptionIllegalArgumentnMustBeAbove0;
    return -1;
  }
  if (n <= 40) {
    return 2;
  }
  if (n <= 160) {
    return 3;
  }
  if (n <= 320) {
    return 4;
  }
  if (n <= 863) {
    return 5;
  }
  e = BCExceptionNoRecommendationPossible;
  return -1;
}
CFX_WideString CBC_PDF417ErrorCorrection::generateErrorCorrection(
    CFX_WideString dataCodewords,
    int32_t errorCorrectionLevel,
    int32_t& e) {
  int32_t k = getErrorCorrectionCodewordCount(errorCorrectionLevel, e);
  BC_EXCEPTION_CHECK_ReturnValue(e, (FX_WCHAR)' ');
  FX_WCHAR* ech = FX_Alloc(FX_WCHAR, k);
  FXSYS_memset(ech, 0, k * sizeof(FX_WCHAR));
  int32_t sld = dataCodewords.GetLength();
  for (int32_t i = 0; i < sld; i++) {
    int32_t t1 = (dataCodewords.GetAt(i) + ech[k - 1]) % 929;
    int32_t t2;
    int32_t t3;
    for (int32_t j = k - 1; j >= 1; j--) {
      t2 = (t1 * EC_COEFFICIENTS[errorCorrectionLevel][j]) % 929;
      t3 = 929 - t2;
      ech[j] = (FX_WCHAR)((ech[j - 1] + t3) % 929);
    }
    t2 = (t1 * EC_COEFFICIENTS[errorCorrectionLevel][0]) % 929;
    t3 = 929 - t2;
    ech[0] = (FX_WCHAR)(t3 % 929);
  }
  CFX_WideString sb;
  for (int32_t j = k - 1; j >= 0; j--) {
    if (ech[j] != 0) {
      ech[j] = (FX_WCHAR)(929 - ech[j]);
    }
    sb += (FX_WCHAR)ech[j];
  }
  FX_Free(ech);
  return sb;
}