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| 1 // Copyright 2016 PDFium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include <stdint.h> |
| 6 |
| 7 #include <limits> |
| 8 |
| 9 #include "core/fxcodec/codec/ccodec_basicmodule.h" |
| 10 #include "core/fxcodec/fx_codec.h" |
| 11 #include "testing/fx_string_testhelpers.h" |
| 12 #include "testing/gtest/include/gtest/gtest.h" |
| 13 |
| 14 TEST(fxcodec, A85TestBadInputs) { |
| 15 uint8_t src_buf[4] = {1, 2, 3, 4}; |
| 16 uint8_t* dest_buf = nullptr; |
| 17 uint32_t src_size = 4; |
| 18 uint32_t dest_size = 0; |
| 19 |
| 20 CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule(); |
| 21 EXPECT_TRUE(pEncoders); |
| 22 |
| 23 // Error codes, not segvs, should callers pass us a nullptr pointer. |
| 24 EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, nullptr)); |
| 25 EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, nullptr, &dest_size)); |
| 26 EXPECT_FALSE(pEncoders->A85Encode(src_buf, 0, &dest_buf, &dest_size)); |
| 27 EXPECT_FALSE(pEncoders->A85Encode(nullptr, src_size, &dest_buf, &dest_size)); |
| 28 } |
| 29 |
| 30 // No leftover bytes, just translate 2 sets of symbols. |
| 31 TEST(fxcodec, A85TestBasic) { |
| 32 // Make sure really big values don't break. |
| 33 uint8_t src_buf[8] = {1, 2, 3, 4, 255, 255, 255, 255}; |
| 34 uint8_t* dest_buf = nullptr; |
| 35 uint32_t src_size = 8; |
| 36 uint32_t dest_size = 0; |
| 37 |
| 38 CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule(); |
| 39 EXPECT_TRUE(pEncoders); |
| 40 |
| 41 // Should succeed. |
| 42 EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size)); |
| 43 |
| 44 // Should have 5 chars for each set of 4 and 2 terminators. |
| 45 EXPECT_EQ(12u, dest_size); |
| 46 uint8_t expected_out[12] = {33, 60, 78, 63, 43, 115, 56, 87, 45, 33, 126, 62}; |
| 47 |
| 48 // Check the output |
| 49 for (uint32_t i = 0; i < 12; i++) |
| 50 EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i; |
| 51 FX_Free(dest_buf); |
| 52 } |
| 53 |
| 54 // Leftover bytes. |
| 55 TEST(fxcodec, A85TestLeftoverBytes) { |
| 56 // 1 Leftover Byte: |
| 57 uint8_t src_buf_1leftover[5] = {1, 2, 3, 4, 255}; |
| 58 uint8_t* dest_buf = nullptr; |
| 59 uint32_t src_size = 5; |
| 60 uint32_t dest_size = 0; |
| 61 |
| 62 CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule(); |
| 63 EXPECT_TRUE(pEncoders); |
| 64 |
| 65 // Should succeed |
| 66 EXPECT_TRUE( |
| 67 pEncoders->A85Encode(src_buf_1leftover, src_size, &dest_buf, &dest_size)); |
| 68 EXPECT_EQ(9u, dest_size); // 5 chars for first symbol + 2 + 2 terminators. |
| 69 uint8_t expected_out_1leftover[9] = {33, 60, 78, 63, 43, 114, 114, 126, 62}; |
| 70 |
| 71 // Check the output |
| 72 for (uint32_t i = 0; i < 9; i++) |
| 73 EXPECT_EQ(dest_buf[i], expected_out_1leftover[i]) << " at " << i; |
| 74 FX_Free(dest_buf); |
| 75 |
| 76 // 2 Leftover bytes: |
| 77 src_size++; |
| 78 dest_buf = nullptr; |
| 79 dest_size = 0; |
| 80 uint8_t src_buf_2leftover[6] = {1, 2, 3, 4, 255, 254}; |
| 81 // Should succeed |
| 82 EXPECT_TRUE( |
| 83 pEncoders->A85Encode(src_buf_2leftover, src_size, &dest_buf, &dest_size)); |
| 84 EXPECT_EQ(10u, dest_size); // 5 chars for first symbol + 3 + 2 terminators. |
| 85 uint8_t expected_out_2leftover[10] = {33, 60, 78, 63, 43, |
| 86 115, 56, 68, 126, 62}; |
| 87 |
| 88 // Check the output |
| 89 for (uint32_t i = 0; i < 10; i++) |
| 90 EXPECT_EQ(dest_buf[i], expected_out_2leftover[i]) << " at " << i; |
| 91 FX_Free(dest_buf); |
| 92 |
| 93 // 3 Leftover bytes: |
| 94 src_size++; |
| 95 dest_buf = nullptr; |
| 96 dest_size = 0; |
| 97 uint8_t src_buf_3leftover[7] = {1, 2, 3, 4, 255, 254, 253}; |
| 98 // Should succeed |
| 99 EXPECT_TRUE( |
| 100 pEncoders->A85Encode(src_buf_3leftover, src_size, &dest_buf, &dest_size)); |
| 101 EXPECT_EQ(11u, dest_size); // 5 chars for first symbol + 4 + 2 terminators. |
| 102 uint8_t expected_out_3leftover[11] = {33, 60, 78, 63, 43, 115, |
| 103 56, 77, 114, 126, 62}; |
| 104 |
| 105 // Check the output |
| 106 for (uint32_t i = 0; i < 11; i++) |
| 107 EXPECT_EQ(dest_buf[i], expected_out_3leftover[i]) << " at " << i; |
| 108 FX_Free(dest_buf); |
| 109 } |
| 110 |
| 111 // Test all zeros comes through as "z". |
| 112 TEST(fxcodec, A85TestZeros) { |
| 113 // Make sure really big values don't break. |
| 114 uint8_t src_buf[8] = {1, 2, 3, 4, 0, 0, 0, 0}; |
| 115 uint8_t* dest_buf = nullptr; |
| 116 uint32_t src_size = 8; |
| 117 uint32_t dest_size = 0; |
| 118 |
| 119 CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule(); |
| 120 EXPECT_TRUE(pEncoders); |
| 121 |
| 122 // Should succeed. |
| 123 EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size)); |
| 124 |
| 125 // Should have 5 chars for first set of 4 + 1 for z + 2 terminators. |
| 126 EXPECT_EQ(8u, dest_size); |
| 127 uint8_t expected_out[8] = {33, 60, 78, 63, 43, 122, 126, 62}; |
| 128 |
| 129 // Check the output |
| 130 for (uint32_t i = 0; i < 8; i++) |
| 131 EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i; |
| 132 FX_Free(dest_buf); |
| 133 |
| 134 // Should also work if it is at the start: |
| 135 dest_buf = nullptr; |
| 136 dest_size = 0; |
| 137 uint8_t src_buf_2[8] = {0, 0, 0, 0, 1, 2, 3, 4}; |
| 138 |
| 139 // Should succeed. |
| 140 EXPECT_TRUE(pEncoders->A85Encode(src_buf_2, src_size, &dest_buf, &dest_size)); |
| 141 |
| 142 // Should have 5 chars for set of 4 + 1 for z + 2 terminators. |
| 143 EXPECT_EQ(8u, dest_size); |
| 144 uint8_t expected_out_2[8] = {122, 33, 60, 78, 63, 43, 126, 62}; |
| 145 |
| 146 // Check the output |
| 147 for (uint32_t i = 0; i < 8; i++) |
| 148 EXPECT_EQ(dest_buf[i], expected_out_2[i]) << " at " << i; |
| 149 FX_Free(dest_buf); |
| 150 |
| 151 // Try with 2 leftover zero bytes. Make sure we don't get a "z". |
| 152 src_size = 6; // Cut off the last 2 zeros. |
| 153 dest_buf = nullptr; |
| 154 dest_size = 0; |
| 155 |
| 156 // Should succeed. |
| 157 EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size)); |
| 158 |
| 159 // Should have 5 chars for set of 4 + 3 for last 2 + 2 terminators. |
| 160 EXPECT_EQ(10u, dest_size); |
| 161 uint8_t expected_out_leftover[10] = {33, 60, 78, 63, 43, 33, 33, 33, 126, 62}; |
| 162 |
| 163 // Check the output |
| 164 for (uint32_t i = 0; i < 10; i++) |
| 165 EXPECT_EQ(dest_buf[i], expected_out_leftover[i]) << " at " << i; |
| 166 FX_Free(dest_buf); |
| 167 } |
| 168 |
| 169 // Make sure we get returns in the expected locations. |
| 170 TEST(fxcodec, A85TestLineBreaks) { |
| 171 // Make sure really big values don't break. |
| 172 uint8_t src_buf[131] = {0}; |
| 173 // 1 full line + most of a line of normal symbols. |
| 174 for (int k = 0; k < 116; k += 4) { |
| 175 src_buf[k] = 1; |
| 176 src_buf[k + 1] = 2; |
| 177 src_buf[k + 2] = 3; |
| 178 src_buf[k + 3] = 4; |
| 179 } |
| 180 // Fill in the end, leaving an all zero gap + 3 extra zeros at the end. |
| 181 for (int k = 120; k < 128; k++) { |
| 182 src_buf[k] = 1; |
| 183 src_buf[k + 1] = 2; |
| 184 src_buf[k + 2] = 3; |
| 185 src_buf[k + 3] = 4; |
| 186 } |
| 187 uint8_t* dest_buf = nullptr; |
| 188 uint32_t src_size = 131; |
| 189 uint32_t dest_size = 0; |
| 190 |
| 191 CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule(); |
| 192 EXPECT_TRUE(pEncoders); |
| 193 |
| 194 // Should succeed. |
| 195 EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size)); |
| 196 |
| 197 // Should have 75 chars in the first row plus 2 char return, |
| 198 // 76 chars in the second row plus 2 char return, |
| 199 // and 9 chars in the last row with 2 terminators. |
| 200 EXPECT_EQ(166u, dest_size); |
| 201 |
| 202 // Check for the returns. |
| 203 EXPECT_EQ(dest_buf[75], 13); |
| 204 EXPECT_EQ(dest_buf[76], 10); |
| 205 EXPECT_EQ(dest_buf[153], 13); |
| 206 EXPECT_EQ(dest_buf[154], 10); |
| 207 |
| 208 FX_Free(dest_buf); |
| 209 } |
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