Sun, 09 Jul 2023 12:43:13 +0200
Release 3.0
530 | 1 | /* |
2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
3 | * | |
4 | * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions are met: | |
8 | * | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
26 | * POSSIBILITY OF SUCH DAMAGE. | |
27 | */ | |
28 | ||
29 | #include "cx/buffer.h" | |
30 | ||
31 | #include <gtest/gtest.h> | |
32 | #include "util_allocator.h" | |
33 | ||
548 | 34 | class BufferFixture : public ::testing::Test { |
35 | protected: | |
36 | void SetUp() override { | |
37 | cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT); | |
38 | buf.size = 6; | |
39 | buf.pos = 3; | |
40 | } | |
41 | ||
42 | void TearDown() override { | |
43 | cxBufferDestroy(&buf); | |
44 | } | |
45 | ||
46 | CxBuffer buf{}; | |
47 | }; | |
48 | ||
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49 | static void expect_default_flush_config(CxBuffer *buf) { |
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50 | EXPECT_EQ(buf->flush_blkmax, 0); |
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51 | EXPECT_EQ(buf->flush_blksize, 4096); |
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52 | EXPECT_EQ(buf->flush_threshold, SIZE_MAX); |
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53 | EXPECT_EQ(buf->flush_func, nullptr); |
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54 | EXPECT_EQ(buf->flush_target, nullptr); |
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55 | } |
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56 | |
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57 | TEST(BufferInit, WrapSpace) { |
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58 | CxTestingAllocator alloc; |
530 | 59 | CxBuffer buf; |
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60 | void *space = cxMalloc(&alloc, 16); |
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61 | cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_DEFAULT); |
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62 | expect_default_flush_config(&buf); |
530 | 63 | EXPECT_EQ(buf.space, space); |
64 | EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0); | |
65 | EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0); | |
66 | EXPECT_EQ(buf.pos, 0); | |
67 | EXPECT_EQ(buf.size, 0); | |
68 | EXPECT_EQ(buf.capacity, 16); | |
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69 | EXPECT_EQ(buf.allocator, &alloc); |
530 | 70 | cxBufferDestroy(&buf); |
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71 | EXPECT_FALSE(alloc.verify()); |
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72 | cxFree(&alloc, space); |
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73 | EXPECT_TRUE(alloc.verify()); |
530 | 74 | } |
75 | ||
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76 | TEST(BufferInit, WrapSpaceAutoExtend) { |
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77 | CxTestingAllocator alloc; |
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78 | CxBuffer buf; |
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79 | void *space = cxMalloc(&alloc, 16); |
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80 | cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_AUTO_EXTEND); |
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81 | expect_default_flush_config(&buf); |
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82 | EXPECT_EQ(buf.space, space); |
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83 | EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, CX_BUFFER_AUTO_EXTEND); |
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84 | EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0); |
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85 | EXPECT_EQ(buf.pos, 0); |
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86 | EXPECT_EQ(buf.size, 0); |
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87 | EXPECT_EQ(buf.capacity, 16); |
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88 | EXPECT_EQ(buf.allocator, &alloc); |
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89 | cxBufferDestroy(&buf); |
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90 | EXPECT_FALSE(alloc.verify()); |
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91 | cxFree(&alloc, space); |
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92 | EXPECT_TRUE(alloc.verify()); |
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93 | } |
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94 | |
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95 | TEST(BufferInit, WrapSpaceAutoFree) { |
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96 | CxTestingAllocator alloc; |
530 | 97 | CxBuffer buf; |
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98 | void *space = cxMalloc(&alloc, 16); |
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99 | cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_FREE_CONTENTS); |
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100 | expect_default_flush_config(&buf); |
530 | 101 | EXPECT_EQ(buf.space, space); |
102 | EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0); | |
103 | EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS); | |
104 | EXPECT_EQ(buf.pos, 0); | |
105 | EXPECT_EQ(buf.size, 0); | |
106 | EXPECT_EQ(buf.capacity, 16); | |
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107 | EXPECT_EQ(buf.allocator, &alloc); |
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108 | EXPECT_FALSE(alloc.verify()); |
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109 | cxBufferDestroy(&buf); |
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110 | EXPECT_TRUE(alloc.verify()); |
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111 | } |
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112 | |
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113 | TEST(BufferInit, FreshSpace) { |
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114 | CxTestingAllocator alloc; |
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115 | CxBuffer buf; |
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116 | cxBufferInit(&buf, nullptr, 8, &alloc, CX_BUFFER_DEFAULT); |
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117 | expect_default_flush_config(&buf); |
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118 | EXPECT_NE(buf.space, nullptr); |
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119 | EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0); |
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120 | EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS); |
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121 | EXPECT_EQ(buf.pos, 0); |
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122 | EXPECT_EQ(buf.size, 0); |
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123 | EXPECT_EQ(buf.capacity, 8); |
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124 | EXPECT_EQ(buf.allocator, &alloc); |
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125 | EXPECT_FALSE(alloc.verify()); // space is still allocated |
530 | 126 | cxBufferDestroy(&buf); |
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127 | EXPECT_TRUE(alloc.verify()); |
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128 | } |
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129 | |
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130 | TEST(BufferInit, OnHeap) { |
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131 | CxTestingAllocator alloc; |
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132 | CxBuffer *buf; |
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133 | void *space = cxMalloc(&alloc, 16); |
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134 | buf = cxBufferCreate(space, 16, &alloc, CX_BUFFER_FREE_CONTENTS); |
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135 | EXPECT_NE(buf, nullptr); |
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136 | expect_default_flush_config(buf); |
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137 | EXPECT_EQ(buf->space, space); |
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138 | EXPECT_EQ(buf->flags & CX_BUFFER_AUTO_EXTEND, 0); |
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139 | EXPECT_EQ(buf->flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS); |
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140 | EXPECT_EQ(buf->pos, 0); |
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141 | EXPECT_EQ(buf->size, 0); |
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142 | EXPECT_EQ(buf->capacity, 16); |
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143 | EXPECT_EQ(buf->allocator, &alloc); |
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144 | cxBufferFree(buf); |
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145 | EXPECT_TRUE(alloc.verify()); |
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146 | } |
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147 | |
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148 | class BufferShiftFixture : public ::testing::Test { |
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149 | protected: |
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150 | void SetUp() override { |
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151 | ASSERT_TRUE(alloc.verify()); |
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152 | cxBufferInit(&buf, nullptr, 16, &alloc, CX_BUFFER_DEFAULT); |
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153 | memcpy(buf.space, "test____________", 16); |
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154 | buf.capacity = 8; // purposely pretend that the buffer has less capacity s.t. we can test beyond the range |
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155 | buf.pos = 4; |
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156 | buf.size = 4; |
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157 | } |
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158 | |
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159 | void TearDown() override { |
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160 | cxBufferDestroy(&buf); |
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161 | EXPECT_TRUE(alloc.verify()); |
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162 | } |
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163 | |
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164 | CxTestingAllocator alloc; |
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165 | CxBuffer buf{}; |
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166 | }; |
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167 | |
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168 | class BufferShiftLeft : public BufferShiftFixture { |
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169 | }; |
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170 | |
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171 | TEST_F(BufferShiftLeft, Zero) { |
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172 | ASSERT_EQ(buf.pos, 4); |
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173 | ASSERT_EQ(buf.size, 4); |
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174 | int ret = cxBufferShiftLeft(&buf, 0); |
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175 | EXPECT_EQ(ret, 0); |
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176 | EXPECT_EQ(buf.pos, 4); |
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177 | EXPECT_EQ(buf.size, 4); |
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178 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); |
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179 | } |
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180 | |
547 | 181 | TEST_F(BufferShiftLeft, ZeroOffsetInterface) { |
182 | ASSERT_EQ(buf.pos, 4); | |
183 | ASSERT_EQ(buf.size, 4); | |
184 | int ret = cxBufferShift(&buf, -0); | |
185 | EXPECT_EQ(ret, 0); | |
186 | EXPECT_EQ(buf.pos, 4); | |
187 | EXPECT_EQ(buf.size, 4); | |
188 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); | |
189 | } | |
190 | ||
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191 | TEST_F(BufferShiftLeft, Standard) { |
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192 | ASSERT_EQ(buf.pos, 4); |
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193 | ASSERT_EQ(buf.size, 4); |
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194 | int ret = cxBufferShiftLeft(&buf, 2); |
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195 | EXPECT_EQ(ret, 0); |
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196 | EXPECT_EQ(buf.pos, 2); |
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197 | EXPECT_EQ(buf.size, 2); |
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198 | EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0); |
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199 | } |
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200 | |
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201 | TEST_F(BufferShiftLeft, Overshift) { |
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202 | ASSERT_LT(buf.pos, 6); |
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203 | ASSERT_LT(buf.size, 6); |
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204 | int ret = cxBufferShiftLeft(&buf, 6); |
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205 | EXPECT_EQ(ret, 0); |
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206 | EXPECT_EQ(buf.pos, 0); |
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207 | EXPECT_EQ(buf.size, 0); |
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208 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); |
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209 | } |
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210 | |
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211 | TEST_F(BufferShiftLeft, OvershiftPosOnly) { |
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212 | buf.pos = 2; |
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213 | ASSERT_EQ(buf.size, 4); |
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214 | int ret = cxBufferShiftLeft(&buf, 3); |
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215 | EXPECT_EQ(ret, 0); |
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216 | EXPECT_EQ(buf.pos, 0); |
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217 | EXPECT_EQ(buf.size, 1); |
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218 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); |
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219 | } |
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220 | |
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221 | TEST_F(BufferShiftLeft, OffsetInterface) { |
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222 | buf.pos = 3; |
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223 | ASSERT_EQ(buf.size, 4); |
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224 | int ret = cxBufferShift(&buf, -2); |
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225 | EXPECT_EQ(ret, 0); |
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226 | EXPECT_EQ(buf.pos, 1); |
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227 | EXPECT_EQ(buf.size, 2); |
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228 | EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0); |
530 | 229 | } |
535
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230 | |
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231 | class BufferShiftRight : public BufferShiftFixture { |
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232 | }; |
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233 | |
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234 | TEST_F(BufferShiftRight, Zero) { |
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235 | ASSERT_EQ(buf.pos, 4); |
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236 | ASSERT_EQ(buf.size, 4); |
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237 | int ret = cxBufferShiftRight(&buf, 0); |
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238 | EXPECT_EQ(ret, 0); |
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239 | EXPECT_EQ(buf.pos, 4); |
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240 | EXPECT_EQ(buf.size, 4); |
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241 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); |
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242 | } |
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243 | |
547 | 244 | TEST_F(BufferShiftRight, ZeroOffsetInterface) { |
245 | ASSERT_EQ(buf.pos, 4); | |
246 | ASSERT_EQ(buf.size, 4); | |
247 | int ret = cxBufferShift(&buf, +0); | |
248 | EXPECT_EQ(ret, 0); | |
249 | EXPECT_EQ(buf.pos, 4); | |
250 | EXPECT_EQ(buf.size, 4); | |
251 | EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0); | |
252 | } | |
253 | ||
535
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254 | TEST_F(BufferShiftRight, Standard) { |
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255 | ASSERT_EQ(buf.pos, 4); |
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256 | ASSERT_EQ(buf.size, 4); |
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257 | int ret = cxBufferShiftRight(&buf, 3); |
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258 | EXPECT_EQ(ret, 0); |
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259 | EXPECT_EQ(buf.pos, 7); |
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260 | EXPECT_EQ(buf.size, 7); |
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261 | EXPECT_TRUE(memcmp(buf.space, "testest_____", 8) == 0); |
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262 | } |
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263 | |
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264 | TEST_F(BufferShiftRight, OvershiftDiscard) { |
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265 | ASSERT_EQ(buf.pos, 4); |
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266 | ASSERT_EQ(buf.size, 4); |
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267 | ASSERT_EQ(buf.capacity, 8); |
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268 | int ret = cxBufferShiftRight(&buf, 6); |
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269 | EXPECT_EQ(ret, 0); |
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270 | EXPECT_EQ(buf.pos, 8); |
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271 | EXPECT_EQ(buf.size, 8); |
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272 | EXPECT_EQ(buf.capacity, 8); |
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273 | EXPECT_TRUE(memcmp(buf.space, "test__te____", 8) == 0); |
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274 | } |
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275 | |
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276 | TEST_F(BufferShiftRight, OvershiftExtend) { |
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277 | ASSERT_EQ(buf.pos, 4); |
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278 | ASSERT_EQ(buf.size, 4); |
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279 | ASSERT_EQ(buf.capacity, 8); |
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280 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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281 | int ret = cxBufferShiftRight(&buf, 6); |
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282 | EXPECT_EQ(ret, 0); |
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283 | EXPECT_EQ(buf.pos, 10); |
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284 | EXPECT_EQ(buf.size, 10); |
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285 | EXPECT_GE(buf.capacity, 10); |
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286 | EXPECT_TRUE(memcmp(buf.space, "test__test__", 8) == 0); |
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287 | } |
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288 | |
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289 | TEST_F(BufferShiftRight, OffsetInterface) { |
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290 | buf.pos = 3; |
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291 | ASSERT_EQ(buf.size, 4); |
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292 | int ret = cxBufferShift(&buf, 2); |
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293 | EXPECT_EQ(ret, 0); |
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294 | EXPECT_EQ(buf.pos, 5); |
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295 | EXPECT_EQ(buf.size, 6); |
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296 | EXPECT_TRUE(memcmp(buf.space, "tetest______", 8) == 0); |
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297 | } |
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298 | |
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299 | TEST(BufferMinimumCapacity, Sufficient) { |
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300 | CxTestingAllocator alloc; |
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301 | auto space = cxMalloc(&alloc, 8); |
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302 | CxBuffer buf; |
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303 | cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS); |
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304 | memcpy(space, "Testing", 8); |
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305 | buf.size = 8; |
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306 | cxBufferMinimumCapacity(&buf, 6); |
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307 | EXPECT_EQ(buf.capacity, 8); |
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308 | EXPECT_EQ(buf.size, 8); |
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309 | EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0); |
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310 | cxBufferDestroy(&buf); |
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311 | EXPECT_TRUE(alloc.verify()); |
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312 | } |
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313 | |
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314 | TEST(BufferMinimumCapacity, Extend) { |
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315 | CxTestingAllocator alloc; |
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316 | auto space = cxMalloc(&alloc, 8); |
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317 | CxBuffer buf; |
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318 | cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS); // NO auto extend! |
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319 | memcpy(space, "Testing", 8); |
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320 | buf.size = 8; |
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321 | cxBufferMinimumCapacity(&buf, 16); |
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322 | EXPECT_EQ(buf.capacity, 16); |
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323 | EXPECT_EQ(buf.size, 8); |
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324 | EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0); |
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325 | cxBufferDestroy(&buf); |
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326 | EXPECT_TRUE(alloc.verify()); |
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327 | } |
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328 | |
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329 | TEST(BufferClear, Test) { |
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330 | char space[16]; |
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331 | strcpy(space, "clear test"); |
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332 | CxBuffer buf; |
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333 | cxBufferInit(&buf, space, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT); |
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334 | ASSERT_EQ(buf.size, 0); |
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335 | // only clear the used part of the buffer |
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336 | cxBufferClear(&buf); |
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337 | EXPECT_EQ(memcmp(space, "clear test", 10), 0); |
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338 | buf.size = 5; |
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339 | buf.pos = 3; |
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340 | cxBufferClear(&buf); |
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341 | EXPECT_EQ(memcmp(space, "\0\0\0\0\0 test", 10), 0); |
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342 | EXPECT_EQ(buf.size, 0); |
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343 | EXPECT_EQ(buf.pos, 0); |
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344 | cxBufferDestroy(&buf); |
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345 | } |
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346 | |
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347 | class BufferWrite : public ::testing::Test { |
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348 | protected: |
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349 | CxBuffer buf{}, target{}; |
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350 | |
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351 | void SetUp() override { |
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352 | cxBufferInit(&target, nullptr, 16, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND); |
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353 | cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT); |
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354 | buf.capacity = 8; // artificially reduce capacity to check OOB writes |
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355 | memset(buf.space, 0, 16); |
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356 | memcpy(buf.space, "prep", 4); |
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357 | buf.size = buf.pos = 4; |
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358 | } |
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359 | |
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360 | void TearDown() override { |
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361 | cxBufferDestroy(&buf); |
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362 | cxBufferDestroy(&target); |
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363 | } |
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364 | |
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365 | void enableFlushing() { |
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366 | buf.flush_target = ⌖ |
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367 | buf.flush_func = reinterpret_cast<cx_write_func>(cxBufferWrite); |
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368 | buf.flush_blkmax = 1; |
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369 | } |
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370 | }; |
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371 | |
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372 | static size_t mock_write_limited_rate( |
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373 | void const *ptr, |
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374 | size_t size, |
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375 | __attribute__((unused)) size_t nitems, |
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376 | CxBuffer *buffer |
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377 | ) { |
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378 | // simulate limited target drain capacity |
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379 | static bool full = false; |
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380 | if (full) { |
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381 | full = false; |
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382 | return 0; |
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383 | } else { |
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384 | full = true; |
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385 | return cxBufferWrite(ptr, size, nitems > 2 ? 2 : nitems, buffer); |
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386 | } |
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387 | } |
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388 | |
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389 | TEST_F(BufferWrite, SizeOneFit) { |
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390 | const char *data = "test"; |
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391 | ASSERT_EQ(buf.capacity, 8); |
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392 | ASSERT_EQ(buf.pos, 4); |
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393 | ASSERT_EQ(buf.size, 4); |
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394 | size_t written = cxBufferWrite(data, 1, 4, &buf); |
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395 | EXPECT_EQ(written, 4); |
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396 | EXPECT_EQ(buf.size, 8); |
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397 | EXPECT_EQ(buf.pos, 8); |
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398 | EXPECT_EQ(buf.capacity, 8); |
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399 | EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0); |
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400 | } |
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401 | |
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402 | TEST_F(BufferWrite, SizeOneDiscard) { |
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403 | const char *data = "testing"; |
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404 | ASSERT_EQ(buf.capacity, 8); |
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405 | ASSERT_EQ(buf.pos, 4); |
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406 | ASSERT_EQ(buf.size, 4); |
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407 | size_t written = cxBufferWrite(data, 1, 7, &buf); |
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408 | EXPECT_EQ(written, 4); |
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409 | EXPECT_EQ(buf.size, 8); |
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410 | EXPECT_EQ(buf.pos, 8); |
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411 | EXPECT_EQ(buf.capacity, 8); |
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412 | EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0); |
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413 | } |
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414 | |
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415 | TEST_F(BufferWrite, SizeOneExtend) { |
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416 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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417 | const char *data = "testing"; |
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418 | ASSERT_EQ(buf.capacity, 8); |
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419 | ASSERT_EQ(buf.pos, 4); |
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420 | ASSERT_EQ(buf.size, 4); |
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421 | size_t written = cxBufferWrite(data, 1, 7, &buf); |
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422 | EXPECT_EQ(written, 7); |
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423 | EXPECT_EQ(buf.size, 11); |
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424 | EXPECT_EQ(buf.pos, 11); |
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425 | EXPECT_GE(buf.capacity, 11); |
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426 | EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0); |
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427 | } |
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428 | |
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429 | TEST_F(BufferWrite, MultibyteFit) { |
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430 | const char *data = "test"; |
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431 | ASSERT_EQ(buf.capacity, 8); |
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432 | ASSERT_EQ(buf.pos, 4); |
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433 | ASSERT_EQ(buf.size, 4); |
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434 | size_t written = cxBufferWrite(data, 2, 2, &buf); |
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435 | EXPECT_EQ(written, 2); |
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436 | EXPECT_EQ(buf.size, 8); |
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437 | EXPECT_EQ(buf.pos, 8); |
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438 | EXPECT_EQ(buf.capacity, 8); |
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439 | EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0); |
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440 | } |
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441 | |
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442 | TEST_F(BufferWrite, MultibyteDiscard) { |
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443 | const char *data = "testing"; |
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444 | ASSERT_EQ(buf.capacity, 8); |
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445 | ASSERT_EQ(buf.size, 4); |
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446 | buf.pos = 3; |
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447 | size_t written = cxBufferWrite(data, 2, 4, &buf); |
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448 | // remember: whole elements are discarded if they do not fit |
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449 | EXPECT_EQ(written, 2); |
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450 | EXPECT_EQ(buf.size, 7); |
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451 | EXPECT_EQ(buf.pos, 7); |
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452 | EXPECT_EQ(buf.capacity, 8); |
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453 | EXPECT_EQ(memcmp(buf.space, "pretest\0", 8), 0); |
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454 | } |
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455 | |
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456 | TEST_F(BufferWrite, MultibyteExtend) { |
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457 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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458 | const char *data = "tester"; |
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459 | ASSERT_EQ(buf.capacity, 8); |
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460 | ASSERT_EQ(buf.size, 4); |
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461 | buf.pos = 3; |
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462 | size_t written = cxBufferWrite(data, 2, 3, &buf); |
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463 | // remember: whole elements are discarded if they do not fit |
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464 | EXPECT_EQ(written, 3); |
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465 | EXPECT_EQ(buf.size, 9); |
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466 | EXPECT_EQ(buf.pos, 9); |
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467 | EXPECT_GE(buf.capacity, 9); |
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468 | EXPECT_EQ(memcmp(buf.space, "pretester", 9), 0); |
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469 | } |
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470 | |
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471 | TEST_F(BufferWrite, PutcWrapperFit) { |
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472 | ASSERT_EQ(buf.capacity, 8); |
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473 | ASSERT_EQ(buf.pos, 4); |
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474 | ASSERT_EQ(buf.size, 4); |
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475 | int c = cxBufferPut(&buf, 0x200 | 'a'); |
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476 | EXPECT_EQ(c, 'a'); |
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477 | EXPECT_EQ(buf.size, 5); |
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478 | EXPECT_EQ(buf.pos, 5); |
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479 | EXPECT_EQ(buf.capacity, 8); |
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480 | EXPECT_EQ(memcmp(buf.space, "prepa\0", 6), 0); |
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481 | } |
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482 | |
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483 | TEST_F(BufferWrite, PutcWrapperDiscard) { |
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484 | ASSERT_EQ(buf.capacity, 8); |
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485 | ASSERT_EQ(buf.size, 4); |
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486 | buf.pos = 8; |
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487 | int c = cxBufferPut(&buf, 0x200 | 'a'); |
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488 | EXPECT_EQ(c, EOF); |
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489 | EXPECT_EQ(buf.size, 4); |
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490 | EXPECT_EQ(buf.pos, 8); |
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491 | EXPECT_EQ(buf.capacity, 8); |
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492 | EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0\0", 9), 0); |
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493 | } |
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494 | |
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495 | TEST_F(BufferWrite, PutcWrapperExtend) { |
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496 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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497 | ASSERT_EQ(buf.capacity, 8); |
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498 | ASSERT_EQ(buf.size, 4); |
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499 | buf.pos = 8; |
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500 | int c = cxBufferPut(&buf, 0x200 | 'a'); |
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501 | EXPECT_EQ(c, 'a'); |
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502 | EXPECT_EQ(buf.size, 9); |
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503 | EXPECT_EQ(buf.pos, 9); |
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504 | EXPECT_GE(buf.capacity, 9); |
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505 | EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0a", 9), 0); |
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506 | } |
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507 | |
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508 | TEST_F(BufferWrite, PutStringWrapperFit) { |
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509 | const char *data = "test"; |
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510 | ASSERT_EQ(buf.capacity, 8); |
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511 | ASSERT_EQ(buf.pos, 4); |
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512 | ASSERT_EQ(buf.size, 4); |
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513 | size_t written = cxBufferPutString(&buf, data); |
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514 | EXPECT_EQ(written, 4); |
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515 | EXPECT_EQ(buf.size, 8); |
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516 | EXPECT_EQ(buf.pos, 8); |
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517 | EXPECT_EQ(buf.capacity, 8); |
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518 | EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0); |
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519 | } |
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520 | |
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521 | TEST_F(BufferWrite, PutStringWrapperDiscard) { |
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522 | const char *data = "testing"; |
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523 | ASSERT_EQ(buf.capacity, 8); |
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524 | ASSERT_EQ(buf.pos, 4); |
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525 | ASSERT_EQ(buf.size, 4); |
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526 | size_t written = cxBufferPutString(&buf, data); |
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527 | EXPECT_EQ(written, 4); |
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528 | EXPECT_EQ(buf.size, 8); |
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529 | EXPECT_EQ(buf.pos, 8); |
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530 | EXPECT_EQ(buf.capacity, 8); |
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531 | EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0); |
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532 | } |
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533 | |
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534 | TEST_F(BufferWrite, PutStringWrapperExtend) { |
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535 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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536 | const char *data = "testing"; |
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537 | ASSERT_EQ(buf.capacity, 8); |
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538 | ASSERT_EQ(buf.pos, 4); |
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539 | ASSERT_EQ(buf.size, 4); |
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540 | size_t written = cxBufferPutString(&buf, data); |
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541 | EXPECT_EQ(written, 7); |
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542 | EXPECT_EQ(buf.size, 11); |
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543 | EXPECT_EQ(buf.pos, 11); |
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544 | EXPECT_GE(buf.capacity, 11); |
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545 | EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0); |
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546 | } |
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547 | |
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548 | TEST_F(BufferWrite, MultOverflow) { |
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549 | const char *data = "testing"; |
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550 | ASSERT_EQ(buf.capacity, 8); |
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551 | ASSERT_EQ(buf.pos, 4); |
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552 | ASSERT_EQ(buf.size, 4); |
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553 | size_t written = cxBufferWrite(data, 8, SIZE_MAX / 4, &buf); |
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554 | EXPECT_EQ(written, 0); |
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555 | EXPECT_EQ(buf.capacity, 8); |
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556 | EXPECT_EQ(buf.pos, 4); |
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557 | EXPECT_EQ(buf.size, 4); |
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558 | EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0); |
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559 | } |
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560 | |
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561 | TEST_F(BufferWrite, MaxCapaOverflow) { |
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562 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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563 | const char *data = "testing"; |
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564 | ASSERT_EQ(buf.capacity, 8); |
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565 | ASSERT_EQ(buf.pos, 4); |
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566 | ASSERT_EQ(buf.size, 4); |
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567 | size_t written = cxBufferWrite(data, 1, SIZE_MAX - 2, &buf); |
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568 | EXPECT_EQ(written, 0); |
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569 | EXPECT_EQ(buf.capacity, 8); |
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570 | EXPECT_EQ(buf.pos, 4); |
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571 | EXPECT_EQ(buf.size, 4); |
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572 | EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0); |
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573 | } |
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574 | |
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575 | TEST_F(BufferWrite, OnlyOverwrite) { |
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576 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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577 | ASSERT_EQ(buf.capacity, 8); |
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578 | memcpy(buf.space, "preptest", 8); |
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579 | buf.pos = 3; |
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580 | buf.size = 8; |
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581 | size_t written = cxBufferWrite("XXX", 2, 2, &buf); |
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582 | EXPECT_EQ(written, 2); |
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583 | EXPECT_EQ(buf.capacity, 8); |
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584 | EXPECT_EQ(buf.size, 8); |
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585 | EXPECT_EQ(buf.pos, 7); |
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586 | EXPECT_EQ(memcmp(buf.space, "preXXX\0t", 8), 0); |
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587 | } |
545
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588 | |
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589 | TEST_F(BufferWrite, FlushAtCapacity) { |
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590 | enableFlushing(); |
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591 | ASSERT_EQ(buf.capacity, 8); |
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592 | ASSERT_EQ(buf.pos, 4); |
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593 | size_t written = cxBufferWrite("foo", 1, 3, &buf); |
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594 | EXPECT_EQ(written, 3); |
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595 | ASSERT_EQ(buf.pos, 7); |
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596 | ASSERT_EQ(buf.size, 7); |
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597 | ASSERT_EQ(target.pos, 0); |
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598 | ASSERT_EQ(target.size, 0); |
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599 | written = cxBufferWrite("hello", 1, 5, &buf); |
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600 | EXPECT_EQ(written, 5); |
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601 | EXPECT_EQ(buf.pos, 0); |
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602 | EXPECT_EQ(buf.size, 0); |
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603 | EXPECT_EQ(buf.capacity, 8); |
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604 | EXPECT_EQ(target.pos, 12); |
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605 | ASSERT_EQ(target.size, 12); |
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606 | EXPECT_EQ(memcmp(target.space, "prepfoohello", 12), 0); |
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607 | } |
546
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608 | |
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609 | TEST_F(BufferWrite, FlushAtThreshold) { |
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610 | enableFlushing(); |
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611 | buf.flush_threshold = 12; |
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612 | buf.flags |= CX_BUFFER_AUTO_EXTEND; |
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613 | ASSERT_EQ(buf.capacity, 8); |
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614 | ASSERT_EQ(buf.pos, 4); |
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615 | size_t written = cxBufferWrite("foobar", 1, 6, &buf); |
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616 | EXPECT_EQ(written, 6); |
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617 | ASSERT_EQ(buf.pos, 10); |
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618 | ASSERT_EQ(buf.size, 10); |
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619 | ASSERT_GE(buf.capacity, 10); |
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620 | ASSERT_LE(buf.capacity, 12); |
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621 | ASSERT_EQ(target.pos, 0); |
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622 | ASSERT_EQ(target.size, 0); |
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623 | written = cxBufferWrite("hello", 1, 5, &buf); |
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624 | EXPECT_EQ(written, 5); |
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625 | EXPECT_EQ(buf.pos, 0); |
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626 | EXPECT_EQ(buf.size, 0); |
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627 | EXPECT_LE(buf.capacity, 12); |
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628 | EXPECT_EQ(target.pos, 15); |
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629 | ASSERT_EQ(target.size, 15); |
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630 | EXPECT_EQ(memcmp(target.space, "prepfoobarhello", 15), 0); |
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631 | } |
547 | 632 | |
567
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633 | TEST_F(BufferWrite, FlushRateLimited) { |
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634 | enableFlushing(); |
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635 | // limit the rate of the flush function and the capacity of the target |
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636 | target.capacity = 16; |
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637 | target.flags &= ~CX_BUFFER_AUTO_EXTEND; |
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638 | buf.flush_func = (cx_write_func) mock_write_limited_rate; |
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639 | ASSERT_EQ(buf.capacity, 8); |
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640 | ASSERT_EQ(buf.pos, 4); |
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641 | size_t written = cxBufferWrite("foo", 1, 3, &buf); |
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642 | EXPECT_EQ(written, 3); |
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643 | ASSERT_EQ(buf.pos, 7); |
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644 | ASSERT_EQ(buf.size, 7); |
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645 | ASSERT_EQ(target.pos, 0); |
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646 | ASSERT_EQ(target.size, 0); |
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647 | written = cxBufferWrite("hello, world!", 1, 13, &buf); |
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648 | // " world!" fits into this buffer, the remaining stuff is flushed out |
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649 | EXPECT_EQ(written, 13); |
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650 | EXPECT_EQ(buf.pos, 7); |
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651 | EXPECT_EQ(buf.size, 7); |
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652 | EXPECT_EQ(buf.capacity, 8); |
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653 | EXPECT_EQ(memcmp(buf.space, " world!", 7), 0); |
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654 | EXPECT_EQ(target.pos, 13); |
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655 | ASSERT_EQ(target.size, 13); |
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656 | EXPECT_EQ(target.capacity, 16); |
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657 | EXPECT_EQ(memcmp(target.space, "prepfoohello,", 13), 0); |
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658 | } |
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659 | |
548 | 660 | class BufferSeek : public BufferFixture { |
547 | 661 | }; |
662 | ||
663 | TEST_F(BufferSeek, SetZero) { | |
664 | int result = cxBufferSeek(&buf, 0, SEEK_SET); | |
665 | EXPECT_EQ(result, 0); | |
666 | EXPECT_EQ(buf.pos, 0); | |
667 | } | |
668 | ||
669 | TEST_F(BufferSeek, SetValid) { | |
670 | int result = cxBufferSeek(&buf, 5, SEEK_SET); | |
671 | EXPECT_EQ(result, 0); | |
672 | EXPECT_EQ(buf.pos, 5); | |
673 | } | |
674 | ||
675 | TEST_F(BufferSeek, SetInvalid) { | |
676 | ASSERT_EQ(buf.pos, 3); | |
677 | int result = cxBufferSeek(&buf, 6, SEEK_SET); | |
678 | EXPECT_NE(result, 0); | |
679 | EXPECT_EQ(buf.pos, 3); | |
680 | } | |
681 | ||
682 | TEST_F(BufferSeek, CurZero) { | |
683 | ASSERT_EQ(buf.pos, 3); | |
684 | int result = cxBufferSeek(&buf, 0, SEEK_CUR); | |
685 | EXPECT_EQ(result, 0); | |
686 | EXPECT_EQ(buf.pos, 3); | |
687 | } | |
688 | ||
689 | TEST_F(BufferSeek, CurValidPositive) { | |
690 | ASSERT_EQ(buf.pos, 3); | |
691 | int result = cxBufferSeek(&buf, 2, SEEK_CUR); | |
692 | EXPECT_EQ(result, 0); | |
693 | EXPECT_EQ(buf.pos, 5); | |
694 | } | |
695 | ||
696 | TEST_F(BufferSeek, CurValidNegative) { | |
697 | ASSERT_EQ(buf.pos, 3); | |
698 | int result = cxBufferSeek(&buf, -3, SEEK_CUR); | |
699 | EXPECT_EQ(result, 0); | |
700 | EXPECT_EQ(buf.pos, 0); | |
701 | } | |
702 | ||
703 | TEST_F(BufferSeek, CurInvalidPositive) { | |
704 | ASSERT_EQ(buf.pos, 3); | |
705 | int result = cxBufferSeek(&buf, 3, SEEK_CUR); | |
706 | EXPECT_NE(result, 0); | |
707 | EXPECT_EQ(buf.pos, 3); | |
708 | } | |
709 | ||
710 | TEST_F(BufferSeek, CurInvalidNegative) { | |
711 | ASSERT_EQ(buf.pos, 3); | |
712 | int result = cxBufferSeek(&buf, -4, SEEK_CUR); | |
713 | EXPECT_NE(result, 0); | |
714 | EXPECT_EQ(buf.pos, 3); | |
715 | } | |
716 | ||
717 | TEST_F(BufferSeek, EndZero) { | |
718 | ASSERT_EQ(buf.size, 6); | |
719 | int result = cxBufferSeek(&buf, 0, SEEK_END); | |
720 | // the (past-the-)end position is always invalid | |
721 | EXPECT_NE(result, 0); | |
722 | EXPECT_EQ(buf.pos, 3); | |
723 | } | |
724 | ||
725 | TEST_F(BufferSeek, EndValid) { | |
726 | ASSERT_EQ(buf.size, 6); | |
727 | int result = cxBufferSeek(&buf, -6, SEEK_END); | |
728 | EXPECT_EQ(result, 0); | |
729 | EXPECT_EQ(buf.pos, 0); | |
730 | } | |
731 | ||
732 | TEST_F(BufferSeek, EndInvalid) { | |
733 | ASSERT_EQ(buf.size, 6); | |
734 | int result = cxBufferSeek(&buf, 1, SEEK_END); | |
735 | EXPECT_NE(result, 0); | |
736 | EXPECT_EQ(buf.pos, 3); | |
737 | } | |
738 | ||
739 | TEST_F(BufferSeek, WhenceInvalid) { | |
740 | ASSERT_EQ(buf.size, 6); | |
741 | ASSERT_EQ(buf.pos, 3); | |
742 | int result = cxBufferSeek(&buf, 2, 9000); | |
743 | EXPECT_NE(result, 0); | |
744 | EXPECT_EQ(buf.size, 6); | |
745 | EXPECT_EQ(buf.pos, 3); | |
548 | 746 | } |
747 | ||
748 | class BufferEof : public BufferFixture { | |
749 | }; | |
750 | ||
751 | TEST_F(BufferEof, Reached) { | |
752 | buf.pos = buf.size; | |
753 | EXPECT_TRUE(cxBufferEof(&buf)); | |
754 | buf.pos = buf.size - 1; | |
755 | ASSERT_FALSE(cxBufferEof(&buf)); | |
756 | cxBufferPut(&buf, 'a'); | |
757 | EXPECT_TRUE(cxBufferEof(&buf)); | |
758 | } | |
759 | ||
760 | TEST_F(BufferEof, NotReached) { | |
761 | buf.pos = buf.size - 1; | |
762 | EXPECT_FALSE(cxBufferEof(&buf)); | |
763 | buf.pos = 0; | |
764 | cxBufferWrite("test", 1, 5, &buf); | |
765 | EXPECT_FALSE(cxBufferEof(&buf)); | |
766 | } | |
568 | 767 | |
768 | class BufferRead : public ::testing::Test { | |
769 | protected: | |
770 | CxBuffer buf{}; | |
771 | ||
772 | void SetUp() override { | |
773 | cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT); | |
774 | buf.capacity = 8; // artificially reduce capacity to check OOB writes | |
775 | memset(buf.space, 0, 16); | |
776 | memcpy(buf.space, "some data", 9); | |
777 | buf.size = 9; | |
778 | } | |
779 | ||
780 | void TearDown() override { | |
781 | cxBufferDestroy(&buf); | |
782 | } | |
783 | }; | |
784 | ||
785 | TEST_F(BufferRead, GetByte) { | |
786 | buf.pos = 2; | |
787 | EXPECT_EQ(cxBufferGet(&buf), 'm'); | |
788 | EXPECT_EQ(cxBufferGet(&buf), 'e'); | |
789 | EXPECT_EQ(cxBufferGet(&buf), ' '); | |
790 | EXPECT_EQ(cxBufferGet(&buf), 'd'); | |
791 | EXPECT_EQ(buf.pos, 6); | |
792 | } | |
793 | ||
794 | TEST_F(BufferRead, GetEof) { | |
795 | buf.pos = buf.size; | |
796 | EXPECT_EQ(cxBufferGet(&buf), EOF); | |
797 | } | |
569 | 798 | |
799 | TEST_F(BufferRead, ReadWithinBounds) { | |
800 | buf.pos = 2; | |
801 | char target[4]; | |
802 | auto read = cxBufferRead(&target, 1, 4, &buf); | |
803 | ASSERT_EQ(read, 4); | |
804 | EXPECT_EQ(memcmp(&target, "me d", 4), 0); | |
805 | EXPECT_EQ(buf.pos, 6); | |
806 | } | |
807 | ||
808 | TEST_F(BufferRead, ReadOutOfBounds) { | |
809 | buf.pos = 6; | |
810 | char target[4]; | |
811 | auto read = cxBufferRead(&target, 1, 4, &buf); | |
812 | ASSERT_EQ(read, 3); | |
813 | EXPECT_EQ(memcmp(&target, "ata", 3), 0); | |
814 | EXPECT_EQ(buf.pos, 9); | |
815 | } | |
816 | ||
817 | TEST_F(BufferRead, ReadOutOfBoundsMultibyte) { | |
818 | buf.pos = 6; | |
819 | char target[4]; | |
820 | target[2] = '\0'; | |
821 | auto read = cxBufferRead(&target, 2, 2, &buf); | |
822 | ASSERT_EQ(read, 1); | |
823 | EXPECT_EQ(memcmp(&target, "at\0", 3), 0); | |
824 | EXPECT_EQ(buf.pos, 8); | |
825 | } | |
826 | ||
827 | TEST_F(BufferRead, ReadEof) { | |
828 | buf.pos = 9; | |
829 | char target[4]; | |
830 | auto read = cxBufferRead(&target, 1, 1, &buf); | |
831 | ASSERT_EQ(read, 0); | |
832 | EXPECT_EQ(buf.pos, 9); | |
833 | } |