1 files changed, 120 insertions, 0 deletions
diff --git a/xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.cpp b/xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.cpp
new file mode 100644
index 0000000000..4779d80157
--- /dev/null
+++ b/xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.cpp
@@ -0,0 +1,120 @@
+// 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 2012 ZXing authors
+ *
+ * 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/fxbarcode/pdf417/BC_PDF417Common.h"
+#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.h"
+#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h"
+#include "xfa/fxbarcode/utils.h"
+
+CBC_PDF417ECModulusGF* CBC_PDF417ECModulusGF::PDF417_GF = NULL;
+void CBC_PDF417ECModulusGF::Initialize(int32_t& e) {
+  PDF417_GF =
+      new CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e);
+}
+void CBC_PDF417ECModulusGF::Finalize() {
+  delete PDF417_GF;
+}
+CBC_PDF417ECModulusGF::CBC_PDF417ECModulusGF(int32_t modulus,
+                                             int32_t generator,
+                                             int32_t& e) {
+  m_modulus = modulus;
+  m_expTable.SetSize(modulus);
+  m_logTable.SetSize(modulus);
+  int32_t x = 1;
+  for (int32_t i = 0; i < modulus; i++) {
+    m_expTable[i] = x;
+    x = (x * generator) % modulus;
+  }
+  for (int32_t j = 0; j < modulus - 1; j++) {
+    m_logTable[m_expTable[j]] = j;
+  }
+  CFX_Int32Array zero;
+  zero.Add(0);
+  m_zero = new CBC_PDF417ECModulusPoly(this, zero, e);
+  CFX_Int32Array one;
+  one.Add(1);
+  m_one = new CBC_PDF417ECModulusPoly(this, one, e);
+}
+CBC_PDF417ECModulusGF::~CBC_PDF417ECModulusGF() {
+  delete m_zero;
+  delete m_one;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getZero() {
+  return m_zero;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getOne() {
+  return m_one;
+}
+CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::buildMonomial(
+    int32_t degree,
+    int32_t coefficient,
+    int32_t& e) {
+  if (degree < 0) {
+    e = BCExceptionIllegalArgument;
+    return NULL;
+  }
+  CBC_PDF417ECModulusPoly* modulusPoly = NULL;
+  if (coefficient == 0) {
+    modulusPoly = new CBC_PDF417ECModulusPoly(m_zero->getField(),
+                                              m_zero->getCoefficients(), e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    return modulusPoly;
+  }
+  CFX_Int32Array coefficients;
+  coefficients.SetSize(degree + 1);
+  coefficients[0] = coefficient;
+  modulusPoly = new CBC_PDF417ECModulusPoly(this, coefficients, e);
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  return modulusPoly;
+}
+int32_t CBC_PDF417ECModulusGF::add(int32_t a, int32_t b) {
+  return (a + b) % m_modulus;
+}
+int32_t CBC_PDF417ECModulusGF::subtract(int32_t a, int32_t b) {
+  return (m_modulus + a - b) % m_modulus;
+}
+int32_t CBC_PDF417ECModulusGF::exp(int32_t a) {
+  return m_expTable[a];
+}
+int32_t CBC_PDF417ECModulusGF::log(int32_t a, int32_t& e) {
+  if (a == 0) {
+    e = BCExceptionIllegalArgument;
+    return -1;
+  }
+  return m_logTable[a];
+}
+int32_t CBC_PDF417ECModulusGF::inverse(int32_t a, int32_t& e) {
+  if (a == 0) {
+    e = BCExceptionIllegalArgument;
+    return -1;
+  }
+  return m_expTable[m_modulus - m_logTable[a] - 1];
+}
+int32_t CBC_PDF417ECModulusGF::multiply(int32_t a, int32_t b) {
+  if (a == 0 || b == 0) {
+    return 0;
+  }
+  return m_expTable[(m_logTable[a] + m_logTable[b]) % (m_modulus - 1)];
+}
+int32_t CBC_PDF417ECModulusGF::getSize() {
+  return m_modulus;
+}