Add postscript path

core/fxcodec/codec/fx_codec_a85_unittest.cpp

+// Copyright 2016 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.
+
+#include <stdint.h>
+
+#include <limits>
+
+#include "core/fxcodec/codec/ccodec_basicmodule.h"
+#include "core/fxcodec/fx_codec.h"
+#include "testing/fx_string_testhelpers.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(fxcodec, A85TestBadInputs) {
+  uint8_t src_buf[4] = {1, 2, 3, 4};
+  uint8_t* dest_buf = nullptr;
+  uint32_t src_size = 4;
+  uint32_t dest_size = 0;
+
+  CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+  EXPECT_TRUE(pEncoders);
+
+  // Error codes, not segvs, should callers pass us a nullptr pointer.
+  EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, nullptr));
+  EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, nullptr, &dest_size));
+  EXPECT_FALSE(pEncoders->A85Encode(src_buf, 0, &dest_buf, &dest_size));
+  EXPECT_FALSE(pEncoders->A85Encode(nullptr, src_size, &dest_buf, &dest_size));
+}
+
+// No leftover bytes, just translate 2 sets of symbols.
+TEST(fxcodec, A85TestBasic) {
+  // Make sure really big values don't break.
+  uint8_t src_buf[8] = {1, 2, 3, 4, 255, 255, 255, 255};
+  uint8_t* dest_buf = nullptr;
+  uint32_t src_size = 8;
+  uint32_t dest_size = 0;
+
+  CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+  EXPECT_TRUE(pEncoders);
+
+  // Should succeed.
+  EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+  // Should have 5 chars for each set of 4 and 2 terminators.
+  uint32_t expected_size = 12;
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out[12] = {33, 60, 78, 63, 43, 115, 56, 87, 45, 33, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i;
+  FX_Free(dest_buf);
+}
+
+// Leftover bytes.
+TEST(fxcodec, A85TestLeftoverBytes) {
+  // 1 Leftover Byte:
+  uint8_t src_buf_1leftover[5] = {1, 2, 3, 4, 255};
+  uint8_t* dest_buf = nullptr;
+  uint32_t src_size = 5;
+  uint32_t dest_size = 0;
+
+  CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+  EXPECT_TRUE(pEncoders);
+
+  // Should succeed
+  EXPECT_TRUE(
+      pEncoders->A85Encode(src_buf_1leftover, src_size, &dest_buf, &dest_size));
+  uint32_t expected_size = 9;  // 5 chars for first symbol + 2 + 2 terminators.
+  EXPECT_EQ(dest_size, expected_size);

[Tom Sepez, 2017/01/11 21:09:08]

nit: typically we write this as 
  EXPECT_EQ(9u, dest_size)
with the expected first as a literal (with the unsigned u modifier) if needed.

[rbpotter, 2017/01/11 22:55:59]

Done.

+  uint8_t expected_out_1leftover[9] = {33, 60, 78, 63, 43, 114, 114, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out_1leftover[i]) << " at " << i;
+  FX_Free(dest_buf);
+
+  // 2 Leftover bytes:
+  src_size++;
+  dest_buf = nullptr;
+  dest_size = 0;
+  uint8_t src_buf_2leftover[6] = {1, 2, 3, 4, 255, 254};
+  // Should succeed
+  EXPECT_TRUE(
+      pEncoders->A85Encode(src_buf_2leftover, src_size, &dest_buf, &dest_size));
+  expected_size = 10;  // 5 chars for first symbol + 3 + 2 terminators.
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out_2leftover[10] = {33,  60, 78, 63,  43,
+                                        115, 56, 68, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out_2leftover[i]) << " at " << i;
+  FX_Free(dest_buf);
+
+  // 3 Leftover bytes:
+  src_size++;
+  dest_buf = nullptr;
+  dest_size = 0;
+  uint8_t src_buf_3leftover[7] = {1, 2, 3, 4, 255, 254, 253};
+  // Should succeed
+  EXPECT_TRUE(
+      pEncoders->A85Encode(src_buf_3leftover, src_size, &dest_buf, &dest_size));
+  expected_size = 11;  // 5 chars for first symbol + 4 + 2 terminators.
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out_3leftover[11] = {33, 60, 78,  63,  43, 115,
+                                        56, 77, 114, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out_3leftover[i]) << " at " << i;
+  FX_Free(dest_buf);
+}
+
+// Test all zeros comes through as "z".
+TEST(fxcodec, A85TestZeros) {
+  // Make sure really big values don't break.
+  uint8_t src_buf[8] = {1, 2, 3, 4, 0, 0, 0, 0};
+  uint8_t* dest_buf = nullptr;
+  uint32_t src_size = 8;
+  uint32_t dest_size = 0;
+
+  CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+  EXPECT_TRUE(pEncoders);
+
+  // Should succeed.
+  EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+  // Should have 5 chars for first set of 4 + 1 for z + 2 terminators.
+  uint32_t expected_size = 8;
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out[8] = {33, 60, 78, 63, 43, 122, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < 8; i++)
+    EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i;
+  FX_Free(dest_buf);
+
+  // Should also work if it is at the start:
+  dest_buf = nullptr;
+  dest_size = 0;
+  uint8_t src_buf_2[8] = {0, 0, 0, 0, 1, 2, 3, 4};
+
+  // Should succeed.
+  EXPECT_TRUE(pEncoders->A85Encode(src_buf_2, src_size, &dest_buf, &dest_size));
+
+  // Should have 5 chars for set of 4 + 1 for z + 2 terminators.
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out_2[8] = {122, 33, 60, 78, 63, 43, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out_2[i]) << " at " << i;
+  FX_Free(dest_buf);
+
+  // Try with 2 leftover zero bytes. Make sure we don't get a "z".
+  src_size = 6;  // Cut off the last 2 zeros.
+  dest_buf = nullptr;
+  dest_size = 0;
+
+  // Should succeed.
+  EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+  // Should have 5 chars for set of 4 + 3 for last 2 + 2 terminators.
+  expected_size = 10;
+  EXPECT_EQ(dest_size, expected_size);
+  uint8_t expected_out_leftover[10] = {33, 60, 78, 63, 43, 33, 33, 33, 126, 62};
+
+  // Check the output
+  for (uint32_t i = 0; i < expected_size; i++)
+    EXPECT_EQ(dest_buf[i], expected_out_leftover[i]) << " at " << i;
+  FX_Free(dest_buf);
+}
+
+// Make sure we get returns in the expected locations.
+TEST(fxcodec, A85TestLineBreaks) {
+  // Make sure really big values don't break.
+  uint8_t src_buf[131] = {0};
+  // 1 full line + most of a line of normal symbols.
+  for (int k = 0; k < 116; k += 4) {
+    src_buf[k] = 1;
+    src_buf[k + 1] = 2;
+    src_buf[k + 2] = 3;
+    src_buf[k + 3] = 4;
+  }
+  // Fill in the end, leaving an all zero gap + 3 extra zeros at the end.
+  for (int k = 120; k < 128; k++) {
+    src_buf[k] = 1;
+    src_buf[k + 1] = 2;
+    src_buf[k + 2] = 3;
+    src_buf[k + 3] = 4;
+  }
+  uint8_t* dest_buf = nullptr;
+  uint32_t src_size = 131;
+  uint32_t dest_size = 0;
+
+  CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+  EXPECT_TRUE(pEncoders);
+
+  // Should succeed.
+  EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+  // Should have 75 chars in the first row plus 2 char return,
+  // 76 chars in the second row plus 2 char return,
+  // and 9 chars in the last row with 2 terminators.
+  uint32_t expected_size = 166;
+  EXPECT_EQ(dest_size, expected_size);
+
+  // Check for the returns.
+  EXPECT_EQ(dest_buf[75], 13);
+  EXPECT_EQ(dest_buf[76], 10);
+  EXPECT_EQ(dest_buf[153], 13);
+  EXPECT_EQ(dest_buf[154], 10);
+}