// 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 "fxbarcode/pdf417/BC_PDF417ErrorCorrection.h"
#include <vector>
namespace {
const uint16_t EC_LEVEL_0_COEFFICIENTS[2] = {27, 917};
const uint16_t EC_LEVEL_1_COEFFICIENTS[4] = {522, 568, 723, 809};
const uint16_t EC_LEVEL_2_COEFFICIENTS[8] = {237, 308, 436, 284,
646, 653, 428, 379};
const uint16_t EC_LEVEL_3_COEFFICIENTS[16] = {274, 562, 232, 755, 599, 524,
801, 132, 295, 116, 442, 428,
295, 42, 176, 65};
const uint16_t EC_LEVEL_4_COEFFICIENTS[32] = {
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};
const uint16_t EC_LEVEL_5_COEFFICIENTS[64] = {
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};
const uint16_t EC_LEVEL_6_COEFFICIENTS[128] = {
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};
const uint16_t EC_LEVEL_7_COEFFICIENTS[256] = {
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};
const uint16_t EC_LEVEL_8_COEFFICIENTS[512] = {
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};
const uint16_t* const EC_COEFFICIENTS[9] = {
EC_LEVEL_0_COEFFICIENTS, EC_LEVEL_1_COEFFICIENTS, EC_LEVEL_2_COEFFICIENTS,
EC_LEVEL_3_COEFFICIENTS, EC_LEVEL_4_COEFFICIENTS, EC_LEVEL_5_COEFFICIENTS,
EC_LEVEL_6_COEFFICIENTS, EC_LEVEL_7_COEFFICIENTS, EC_LEVEL_8_COEFFICIENTS};
} // namespace
CBC_PDF417ErrorCorrection::CBC_PDF417ErrorCorrection() {}
CBC_PDF417ErrorCorrection::~CBC_PDF417ErrorCorrection() {}
int32_t CBC_PDF417ErrorCorrection::getErrorCorrectionCodewordCount(
int32_t errorCorrectionLevel) {
if (errorCorrectionLevel < 0 || errorCorrectionLevel > 8)
return -1;
return 1 << (errorCorrectionLevel + 1);
}
bool CBC_PDF417ErrorCorrection::generateErrorCorrection(
const WideString& dataCodewords,
int32_t errorCorrectionLevel,
WideString* result) {
assert(result);
assert(result->IsEmpty());
int32_t k = getErrorCorrectionCodewordCount(errorCorrectionLevel);
if (k < 0)
return false;
std::vector<wchar_t> ech(k);
int32_t sld = dataCodewords.GetLength();
for (int32_t i = 0; i < sld; i++) {
int32_t t1 = (dataCodewords[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] = (wchar_t)((ech[j - 1] + t3) % 929);
}
t2 = (t1 * EC_COEFFICIENTS[errorCorrectionLevel][0]) % 929;
t3 = 929 - t2;
ech[0] = (wchar_t)(t3 % 929);
}
result->Reserve(k);
for (int32_t j = k - 1; j >= 0; j--) {
if (ech[j] != 0)
ech[j] = static_cast<wchar_t>(929) - ech[j];
*result += ech[j];
}
return true;
}