OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2013 The Chromium 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 // Author: markus@chromium.org |
| 6 |
| 7 #include <stdio.h> |
| 8 #include <string.h> |
| 9 |
| 10 #include <limits> |
| 11 |
| 12 #include "base/debug/format.h" |
| 13 #include "base/logging.h" |
| 14 #include "testing/gtest/include/gtest/gtest.h" |
| 15 |
| 16 namespace base { |
| 17 namespace debug { |
| 18 |
| 19 TEST(FormatTest, Empty) { |
| 20 char buf[2] = { 'X', 'X' }; |
| 21 |
| 22 // Negative buffer size should always result in an error. |
| 23 EXPECT_EQ(-1, FormatN(buf, -1, "")); |
| 24 EXPECT_EQ('X', buf[0]); |
| 25 EXPECT_EQ('X', buf[1]); |
| 26 |
| 27 // Zero buffer size should always result in an error. |
| 28 EXPECT_EQ(-1, FormatN(buf, 0, "")); |
| 29 EXPECT_EQ('X', buf[0]); |
| 30 EXPECT_EQ('X', buf[1]); |
| 31 |
| 32 // A one-byte buffer should always print a single NUL byte. |
| 33 EXPECT_EQ(0, FormatN(buf, 1, "")); |
| 34 EXPECT_EQ(0, buf[0]); |
| 35 EXPECT_EQ('X', buf[1]); |
| 36 buf[0] = 'X'; |
| 37 |
| 38 // A larger buffer should leave the trailing bytes unchanged. |
| 39 EXPECT_EQ(0, FormatN(buf, 2, "")); |
| 40 EXPECT_EQ(0, buf[0]); |
| 41 EXPECT_EQ('X', buf[1]); |
| 42 buf[0] = 'X'; |
| 43 |
| 44 // The same test using Format() instead of FormatN(). |
| 45 EXPECT_EQ(0, Format(buf, "")); |
| 46 EXPECT_EQ(0, buf[0]); |
| 47 EXPECT_EQ('X', buf[1]); |
| 48 buf[0] = 'X'; |
| 49 } |
| 50 |
| 51 TEST(FormatTest, NoArguments) { |
| 52 // Output a text message that doesn't require any substitutions. This |
| 53 // is roughly equivalent to calling strncpy() (but unlike strncpy(), it does |
| 54 // always add a trailing NUL; it always deduplicates '%' characters). |
| 55 const char text[] = "hello world"; |
| 56 char ref[20], buf[20]; |
| 57 memset(ref, 'X', sizeof(buf)); |
| 58 memcpy(buf, ref, sizeof(buf)); |
| 59 |
| 60 // A negative buffer size should always result in an error. |
| 61 EXPECT_EQ(-1, FormatN(buf, -1, text)); |
| 62 EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
| 63 |
| 64 // Zero buffer size should always result in an error. |
| 65 EXPECT_EQ(-1, FormatN(buf, 0, text)); |
| 66 EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
| 67 |
| 68 // A one-byte buffer should always print a single NUL byte. |
| 69 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 1, text)); |
| 70 EXPECT_EQ(0, buf[0]); |
| 71 EXPECT_TRUE(!memcmp(buf+1, ref+1, sizeof(buf)-1)); |
| 72 memcpy(buf, ref, sizeof(buf)); |
| 73 |
| 74 // A larger (but limited) buffer should always leave the trailing bytes |
| 75 // unchanged. |
| 76 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 2, text)); |
| 77 EXPECT_EQ(text[0], buf[0]); |
| 78 EXPECT_EQ(0, buf[1]); |
| 79 EXPECT_TRUE(!memcmp(buf+2, ref+2, sizeof(buf)-2)); |
| 80 memcpy(buf, ref, sizeof(buf)); |
| 81 |
| 82 // A unrestricted buffer length should always leave the trailing bytes |
| 83 // unchanged. |
| 84 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, |
| 85 FormatN(buf, sizeof(buf), text)); |
| 86 EXPECT_EQ(std::string(text), std::string(buf)); |
| 87 EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
| 88 sizeof(buf) - sizeof(text))); |
| 89 memcpy(buf, ref, sizeof(buf)); |
| 90 |
| 91 // The same test using Format() instead of FormatN(). |
| 92 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, Format(buf, text)); |
| 93 EXPECT_EQ(std::string(text), std::string(buf)); |
| 94 EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
| 95 sizeof(buf) - sizeof(text))); |
| 96 memcpy(buf, ref, sizeof(buf)); |
| 97 |
| 98 // Check for deduplication of '%' percent characters. |
| 99 EXPECT_EQ(1, Format(buf, "%")); |
| 100 EXPECT_EQ(1, Format(buf, "%%")); |
| 101 EXPECT_EQ(2, Format(buf, "%%%")); |
| 102 EXPECT_EQ(2, Format(buf, "%%%%")); |
| 103 EXPECT_EQ(2, Format(buf, "%X")); |
| 104 EXPECT_EQ(2, Format(buf, "%%X")); |
| 105 EXPECT_EQ(3, Format(buf, "%%%X")); |
| 106 EXPECT_EQ(3, Format(buf, "%%%%X")); |
| 107 } |
| 108 |
| 109 TEST(FormatTest, OneArgument) { |
| 110 // Test basic single-argument single-character substitution. |
| 111 const char text[] = "hello world"; |
| 112 const char fmt[] = "hello%cworld"; |
| 113 char ref[20], buf[20]; |
| 114 memset(ref, 'X', sizeof(buf)); |
| 115 memcpy(buf, ref, sizeof(buf)); |
| 116 |
| 117 // A negative buffer size should always result in an error. |
| 118 EXPECT_EQ(-1, FormatN(buf, -1, fmt, ' ')); |
| 119 EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
| 120 |
| 121 // Zero buffer size should always result in an error. |
| 122 EXPECT_EQ(-1, FormatN(buf, 0, fmt, ' ')); |
| 123 EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
| 124 |
| 125 // A one-byte buffer should always print a single NUL byte. |
| 126 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 1, fmt, ' ')); |
| 127 EXPECT_EQ(0, buf[0]); |
| 128 EXPECT_TRUE(!memcmp(buf+1, ref+1, sizeof(buf)-1)); |
| 129 memcpy(buf, ref, sizeof(buf)); |
| 130 |
| 131 // A larger (but limited) buffer should always leave the trailing bytes |
| 132 // unchanged. |
| 133 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 2, fmt, ' ')); |
| 134 EXPECT_EQ(text[0], buf[0]); |
| 135 EXPECT_EQ(0, buf[1]); |
| 136 EXPECT_TRUE(!memcmp(buf+2, ref+2, sizeof(buf)-2)); |
| 137 memcpy(buf, ref, sizeof(buf)); |
| 138 |
| 139 // A unrestricted buffer length should always leave the trailing bytes |
| 140 // unchanged. |
| 141 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, |
| 142 FormatN(buf, sizeof(buf), fmt, ' ')); |
| 143 EXPECT_EQ(std::string(text), std::string(buf)); |
| 144 EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
| 145 sizeof(buf) - sizeof(text))); |
| 146 memcpy(buf, ref, sizeof(buf)); |
| 147 |
| 148 // The same test using Format() instead of FormatN(). |
| 149 EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, Format(buf, fmt, ' ')); |
| 150 EXPECT_EQ(std::string(text), std::string(buf)); |
| 151 EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
| 152 sizeof(buf) - sizeof(text))); |
| 153 memcpy(buf, ref, sizeof(buf)); |
| 154 |
| 155 // Check for deduplication of '%' percent characters. |
| 156 EXPECT_EQ(1, Format(buf, "%", 0)); |
| 157 EXPECT_EQ(1, Format(buf, "%%", 0)); |
| 158 EXPECT_EQ(2, Format(buf, "%%%", 0)); |
| 159 EXPECT_EQ(2, Format(buf, "%%%%", 0)); |
| 160 EXPECT_EQ(2, Format(buf, "%Y", 0)); |
| 161 EXPECT_EQ(2, Format(buf, "%%Y", 0)); |
| 162 EXPECT_EQ(3, Format(buf, "%%%Y", 0)); |
| 163 EXPECT_EQ(3, Format(buf, "%%%%Y", 0)); |
| 164 } |
| 165 |
| 166 #ifdef NDEBUG |
| 167 TEST(FormatTest, MissingArg) { |
| 168 char buf[20]; |
| 169 EXPECT_EQ(3, Format(buf, "%c%c", 'A')); |
| 170 EXPECT_EQ("A%c", std::string(buf)); |
| 171 } |
| 172 #endif |
| 173 |
| 174 TEST(FormatTest, NArgs) { |
| 175 // Pre-C++11 compilers have a different code path, that can only print |
| 176 // up to ten distinct arguments. |
| 177 // We test both Format() and FormatN(). This makes sure we don't have |
| 178 // typos in the copy-n-pasted code that is needed to deal with various |
| 179 // numbers of arguments. |
| 180 char buf[12]; |
| 181 EXPECT_EQ(1, Format(buf, "%c", 1)); |
| 182 EXPECT_EQ("\1", std::string(buf)); |
| 183 EXPECT_EQ(2, Format(buf, "%c%c", 1, 2)); |
| 184 EXPECT_EQ("\1\2", std::string(buf)); |
| 185 EXPECT_EQ(3, Format(buf, "%c%c%c", 1, 2, 3)); |
| 186 EXPECT_EQ("\1\2\3", std::string(buf)); |
| 187 EXPECT_EQ(4, Format(buf, "%c%c%c%c", 1, 2, 3, 4)); |
| 188 EXPECT_EQ("\1\2\3\4", std::string(buf)); |
| 189 EXPECT_EQ(5, Format(buf, "%c%c%c%c%c", 1, 2, 3, 4, 5)); |
| 190 EXPECT_EQ("\1\2\3\4\5", std::string(buf)); |
| 191 EXPECT_EQ(6, Format(buf, "%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6)); |
| 192 EXPECT_EQ("\1\2\3\4\5\6", std::string(buf)); |
| 193 EXPECT_EQ(7, Format(buf, "%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7)); |
| 194 EXPECT_EQ("\1\2\3\4\5\6\7", std::string(buf)); |
| 195 EXPECT_EQ(8, Format(buf, "%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8)); |
| 196 EXPECT_EQ("\1\2\3\4\5\6\7\10", std::string(buf)); |
| 197 EXPECT_EQ(9, Format(buf, "%c%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8, 9)); |
| 198 EXPECT_EQ("\1\2\3\4\5\6\7\10\11", std::string(buf)); |
| 199 EXPECT_EQ(10, Format(buf, "%c%c%c%c%c%c%c%c%c%c", |
| 200 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)); |
| 201 |
| 202 // Repeat all the tests with FormatN() instead of Format(). |
| 203 EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12", std::string(buf)); |
| 204 EXPECT_EQ(1, FormatN(buf, 11, "%c", 1)); |
| 205 EXPECT_EQ("\1", std::string(buf)); |
| 206 EXPECT_EQ(2, FormatN(buf, 11, "%c%c", 1, 2)); |
| 207 EXPECT_EQ("\1\2", std::string(buf)); |
| 208 EXPECT_EQ(3, FormatN(buf, 11, "%c%c%c", 1, 2, 3)); |
| 209 EXPECT_EQ("\1\2\3", std::string(buf)); |
| 210 EXPECT_EQ(4, FormatN(buf, 11, "%c%c%c%c", 1, 2, 3, 4)); |
| 211 EXPECT_EQ("\1\2\3\4", std::string(buf)); |
| 212 EXPECT_EQ(5, FormatN(buf, 11, "%c%c%c%c%c", 1, 2, 3, 4, 5)); |
| 213 EXPECT_EQ("\1\2\3\4\5", std::string(buf)); |
| 214 EXPECT_EQ(6, FormatN(buf, 11, "%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6)); |
| 215 EXPECT_EQ("\1\2\3\4\5\6", std::string(buf)); |
| 216 EXPECT_EQ(7, FormatN(buf, 11, "%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7)); |
| 217 EXPECT_EQ("\1\2\3\4\5\6\7", std::string(buf)); |
| 218 EXPECT_EQ(8, FormatN(buf, 11, "%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8)); |
| 219 EXPECT_EQ("\1\2\3\4\5\6\7\10", std::string(buf)); |
| 220 EXPECT_EQ(9, FormatN(buf, 11, "%c%c%c%c%c%c%c%c%c", |
| 221 1, 2, 3, 4, 5, 6, 7, 8, 9)); |
| 222 EXPECT_EQ("\1\2\3\4\5\6\7\10\11", std::string(buf)); |
| 223 EXPECT_EQ(10, FormatN(buf, 11, "%c%c%c%c%c%c%c%c%c%c", |
| 224 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)); |
| 225 EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12", std::string(buf)); |
| 226 |
| 227 |
| 228 // C++11 is smart enough to handle variadic template arguments. It can |
| 229 // deal with arbitrary numbers of arguments. |
| 230 #if __cplusplus >= 201103 // C++11 |
| 231 EXPECT_EQ(11, Format(buf, "%c%c%c%c%c%c%c%c%c%c%c", |
| 232 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)); |
| 233 EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12\13", std::string(buf)); |
| 234 EXPECT_EQ(11, FormatN(buf, 12, "%c%c%c%c%c%c%c%c%c%c%c", |
| 235 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)); |
| 236 EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12\13", std::string(buf)); |
| 237 #endif |
| 238 } |
| 239 |
| 240 TEST(FormatTest, DataTypes) { |
| 241 char buf[40]; |
| 242 |
| 243 // Bytes |
| 244 EXPECT_EQ(1, Format(buf, "%d", (uint8_t)1)); |
| 245 EXPECT_EQ("1", std::string(buf)); |
| 246 EXPECT_EQ(3, Format(buf, "%d", (uint8_t)-1)); |
| 247 EXPECT_EQ("255", std::string(buf)); |
| 248 EXPECT_EQ(1, Format(buf, "%d", (int8_t)1)); |
| 249 EXPECT_EQ("1", std::string(buf)); |
| 250 EXPECT_EQ(2, Format(buf, "%d", (int8_t)-1)); |
| 251 EXPECT_EQ("-1", std::string(buf)); |
| 252 EXPECT_EQ(4, Format(buf, "%d", (int8_t)-128)); |
| 253 EXPECT_EQ("-128", std::string(buf)); |
| 254 |
| 255 // Half-words |
| 256 EXPECT_EQ(1, Format(buf, "%d", (uint16_t)1)); |
| 257 EXPECT_EQ("1", std::string(buf)); |
| 258 EXPECT_EQ(5, Format(buf, "%d", (uint16_t)-1)); |
| 259 EXPECT_EQ("65535", std::string(buf)); |
| 260 EXPECT_EQ(1, Format(buf, "%d", (int16_t)1)); |
| 261 EXPECT_EQ("1", std::string(buf)); |
| 262 EXPECT_EQ(2, Format(buf, "%d", (int16_t)-1)); |
| 263 EXPECT_EQ("-1", std::string(buf)); |
| 264 EXPECT_EQ(6, Format(buf, "%d", (int16_t)-32768)); |
| 265 EXPECT_EQ("-32768", std::string(buf)); |
| 266 |
| 267 // Words |
| 268 EXPECT_EQ(1, Format(buf, "%d", (uint32_t)1)); |
| 269 EXPECT_EQ("1", std::string(buf)); |
| 270 EXPECT_EQ(10, Format(buf, "%d", (uint32_t)-1)); |
| 271 EXPECT_EQ("4294967295", std::string(buf)); |
| 272 EXPECT_EQ(1, Format(buf, "%d", (int32_t)1)); |
| 273 EXPECT_EQ("1", std::string(buf)); |
| 274 EXPECT_EQ(2, Format(buf, "%d", (int32_t)-1)); |
| 275 EXPECT_EQ("-1", std::string(buf)); |
| 276 // Work-around for an limitation of C90 |
| 277 EXPECT_EQ(11, Format(buf, "%d", (int32_t)-2147483647-1)); |
| 278 EXPECT_EQ("-2147483648", std::string(buf)); |
| 279 |
| 280 // Quads |
| 281 EXPECT_EQ(1, Format(buf, "%d", (uint64_t)1)); |
| 282 EXPECT_EQ("1", std::string(buf)); |
| 283 EXPECT_EQ(20, Format(buf, "%d", (uint64_t)-1)); |
| 284 EXPECT_EQ("18446744073709551615", std::string(buf)); |
| 285 EXPECT_EQ(1, Format(buf, "%d", (int64_t)1)); |
| 286 EXPECT_EQ("1", std::string(buf)); |
| 287 EXPECT_EQ(2, Format(buf, "%d", (int64_t)-1)); |
| 288 EXPECT_EQ("-1", std::string(buf)); |
| 289 // Work-around for an limitation of C90 |
| 290 EXPECT_EQ(20, Format(buf, "%d", (int64_t)-9223372036854775807LL-1)); |
| 291 EXPECT_EQ("-9223372036854775808", std::string(buf)); |
| 292 |
| 293 // Strings (both const and mutable). |
| 294 EXPECT_EQ(4, Format(buf, "test")); |
| 295 EXPECT_EQ("test", std::string(buf)); |
| 296 EXPECT_EQ(4, Format(buf, buf)); |
| 297 EXPECT_EQ("test", std::string(buf)); |
| 298 |
| 299 // Pointer |
| 300 char addr[20]; |
| 301 sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)buf); |
| 302 Format(buf, "%p", buf); |
| 303 EXPECT_EQ(std::string(addr), std::string(buf)); |
| 304 Format(buf, "%p", (const char *)buf); |
| 305 EXPECT_EQ(std::string(addr), std::string(buf)); |
| 306 sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)sprintf); |
| 307 Format(buf, "%p", sprintf); |
| 308 EXPECT_EQ(std::string(addr), std::string(buf)); |
| 309 |
| 310 // Padding for pointers is a little more complicated because of the "0x" |
| 311 // prefix. Padding with '0' zeros is relatively straight-forward, but |
| 312 // padding with ' ' spaces requires more effort. |
| 313 sprintf(addr, "0x%017llX", (unsigned long long)(uintptr_t)buf); |
| 314 Format(buf, "%019p", buf); |
| 315 EXPECT_EQ(std::string(addr), std::string(buf)); |
| 316 sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)buf); |
| 317 memset(addr, ' ', |
| 318 (char *)memmove(addr + sizeof(addr) - strlen(addr) - 1, |
| 319 addr, strlen(addr)+1) - addr); |
| 320 Format(buf, "%19p", buf); |
| 321 EXPECT_EQ(std::string(addr), std::string(buf)); |
| 322 } |
| 323 |
| 324 namespace { |
| 325 void PrintLongString(char* buf, size_t sz) { |
| 326 // Output a reasonably complex expression into a limited-size buffer. |
| 327 // At least one byte is available for writing the NUL character. |
| 328 CHECK_GT(sz, static_cast<size_t>(0)); |
| 329 |
| 330 // Allocate slightly more space, so that we can verify that Format() |
| 331 // never writes past the end of the buffer. |
| 332 char *tmp = new char[sz+2]; |
| 333 memset(tmp, 'X', sz+2); |
| 334 |
| 335 // Use Format() to output a complex list of arguments: |
| 336 // - test padding and truncating %c single characters. |
| 337 // - test truncating %s simple strings. |
| 338 // - test mismatching arguments and truncating (for %d != %s). |
| 339 // - test zero-padding and truncating %x hexadecimal numbers. |
| 340 // - test outputting and truncating %d MININT. |
| 341 // - test outputting and truncating %p arbitrary pointer values. |
| 342 // - test outputting, padding and truncating NULL-pointer %s strings. |
| 343 size_t needed = FormatN(tmp, sz, |
| 344 #ifdef NDEBUG |
| 345 "A%2cong %s: %d %010X %d %p%7s", 'l', "string", "", |
| 346 #else |
| 347 "A%2cong %s: %%d %010X %d %p%7s", 'l', "string", |
| 348 #endif |
| 349 0xDEADBEEF, std::numeric_limits<intptr_t>::min(), |
| 350 PrintLongString, static_cast<char*>(NULL)) + 1; |
| 351 |
| 352 // Various sanity checks: |
| 353 // The numbered of characters needed to print the full string should always |
| 354 // be bigger or equal to the bytes that have actually been output. |
| 355 size_t len = strlen(tmp); |
| 356 CHECK_GE(needed, len+1); |
| 357 |
| 358 // The number of characters output should always fit into the buffer that |
| 359 // was passed into Format(). |
| 360 CHECK_LT(len, sz); |
| 361 |
| 362 // The output is always terminated with a NUL byte (actually, this test is |
| 363 // always going to pass, as strlen() already verified this) |
| 364 EXPECT_FALSE(tmp[len]); |
| 365 |
| 366 // All trailing bytes are unchanged. |
| 367 for (size_t i = len+1; i < sz+2; ++i) |
| 368 EXPECT_EQ('X', tmp[i]); |
| 369 |
| 370 // The text that was generated by Format() should always match the |
| 371 // equivalent text generated by sprintf(). Please note that the format |
| 372 // string for sprintf() is nor complicated, as it does not have the |
| 373 // benefit of getting type information from the C++ compiler. |
| 374 // |
| 375 // N.B.: It would be so much cleaner to use snprintf(). But unfortunately, |
| 376 // Visual Studio doesn't support this function, and the work-arounds |
| 377 // are all really awkward. |
| 378 char ref[256]; |
| 379 CHECK_LE(sz, sizeof(ref)); |
| 380 sprintf(ref, "A long string: %%d 00DEADBEEF %lld 0x%llX <NULL>", |
| 381 static_cast<long long>(std::numeric_limits<intptr_t>::min()), |
| 382 (long long)PrintLongString); |
| 383 ref[sz-1] = '\000'; |
| 384 |
| 385 // Compare the output from Format() to the one from sprintf(). |
| 386 EXPECT_EQ(std::string(ref), std::string(tmp)); |
| 387 |
| 388 // We allocated a slightly larger buffer, so that we could perform some |
| 389 // extra sanity checks. Now that the tests have all passed, we copy the |
| 390 // data to the output buffer that the caller provided. |
| 391 memcpy(buf, tmp, len+1); |
| 392 delete[] tmp; |
| 393 } |
| 394 } // anonymous namespace |
| 395 |
| 396 TEST(FormatTest, Truncation) { |
| 397 // We use PrintLongString() to print a complex long string and then |
| 398 // truncate to all possible lengths. This ends up exercising a lot of |
| 399 // different code paths in Format() and itoa_r(), as truncation can |
| 400 // happen in a lot of different states. |
| 401 char ref[256]; |
| 402 PrintLongString(ref, sizeof(ref)); |
| 403 for (size_t i = strlen(ref)+1; i; --i) { |
| 404 char buf[sizeof(ref)]; |
| 405 PrintLongString(buf, i); |
| 406 EXPECT_EQ(std::string(ref, i - 1), std::string(buf)); |
| 407 } |
| 408 } |
| 409 |
| 410 TEST(FormatTest, Padding) { |
| 411 char buf[40], fmt[40]; |
| 412 |
| 413 // Chars %c |
| 414 EXPECT_EQ(1, Format(buf, "%c", 'A')); |
| 415 EXPECT_EQ("A", std::string(buf)); |
| 416 EXPECT_EQ(2, Format(buf, "%2c", 'A')); |
| 417 EXPECT_EQ(" A", std::string(buf)); |
| 418 EXPECT_EQ(2, Format(buf, "%02c", 'A')); |
| 419 EXPECT_EQ(" A", std::string(buf)); |
| 420 EXPECT_EQ(4, Format(buf, "%-2c", 'A')); |
| 421 EXPECT_EQ("%-2c", std::string(buf)); |
| 422 Format(fmt, "%%%dc", std::numeric_limits<ssize_t>::max()); |
| 423 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, Format(buf, fmt, 'A')); |
| 424 #ifdef NDEBUG |
| 425 Format(fmt, "%%%dc", |
| 426 static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
| 427 EXPECT_EQ(2, Format(buf, fmt, 'A')); |
| 428 EXPECT_EQ("%c", std::string(buf)); |
| 429 #endif |
| 430 |
| 431 // Decimals %d |
| 432 EXPECT_EQ(1, Format(buf, "%d", 1)); |
| 433 EXPECT_EQ("1", std::string(buf)); |
| 434 EXPECT_EQ(2, Format(buf, "%2d", 1)); |
| 435 EXPECT_EQ(" 1", std::string(buf)); |
| 436 EXPECT_EQ(2, Format(buf, "%02d", 1)); |
| 437 EXPECT_EQ("01", std::string(buf)); |
| 438 EXPECT_EQ(3, Format(buf, "%3d", -1)); |
| 439 EXPECT_EQ(" -1", std::string(buf)); |
| 440 EXPECT_EQ(3, Format(buf, "%03d", -1)); |
| 441 EXPECT_EQ("-01", std::string(buf)); |
| 442 EXPECT_EQ(3, Format(buf, "%2d", 111)); |
| 443 EXPECT_EQ("111", std::string(buf)); |
| 444 EXPECT_EQ(4, Format(buf, "%2d", -111)); |
| 445 EXPECT_EQ("-111", std::string(buf)); |
| 446 EXPECT_EQ(4, Format(buf, "%-2d", 1)); |
| 447 EXPECT_EQ("%-2d", std::string(buf)); |
| 448 Format(fmt, "%%%dd", std::numeric_limits<ssize_t>::max()); |
| 449 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
| 450 EXPECT_EQ(" ", std::string(buf)); |
| 451 Format(fmt, "%%0%dd", std::numeric_limits<ssize_t>::max()); |
| 452 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
| 453 EXPECT_EQ("000", std::string(buf)); |
| 454 #ifdef NDEBUG |
| 455 Format(fmt, "%%%dd", |
| 456 static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
| 457 EXPECT_EQ(2, Format(buf, fmt, 1)); |
| 458 EXPECT_EQ("%d", std::string(buf)); |
| 459 #endif |
| 460 |
| 461 // Hex %X |
| 462 EXPECT_EQ(1, Format(buf, "%X", 1)); |
| 463 EXPECT_EQ("1", std::string(buf)); |
| 464 EXPECT_EQ(2, Format(buf, "%2X", 1)); |
| 465 EXPECT_EQ(" 1", std::string(buf)); |
| 466 EXPECT_EQ(2, Format(buf, "%02X", 1)); |
| 467 EXPECT_EQ("01", std::string(buf)); |
| 468 EXPECT_EQ(8, Format(buf, "%3X", -1)); |
| 469 EXPECT_EQ("FFFFFFFF", std::string(buf)); |
| 470 EXPECT_EQ(8, Format(buf, "%03X", -1)); |
| 471 EXPECT_EQ("FFFFFFFF", std::string(buf)); |
| 472 EXPECT_EQ(16, Format(buf, "%3X", -1LL)); |
| 473 EXPECT_EQ("FFFFFFFFFFFFFFFF", std::string(buf)); |
| 474 EXPECT_EQ(16, Format(buf, "%03X", -1LL)); |
| 475 EXPECT_EQ("FFFFFFFFFFFFFFFF", std::string(buf)); |
| 476 EXPECT_EQ(3, Format(buf, "%2X", 0x111)); |
| 477 EXPECT_EQ("111", std::string(buf)); |
| 478 EXPECT_EQ(4, Format(buf, "%-2X", 1)); |
| 479 EXPECT_EQ("%-2X", std::string(buf)); |
| 480 Format(fmt, "%%%dX", std::numeric_limits<ssize_t>::max()); |
| 481 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
| 482 EXPECT_EQ(" ", std::string(buf)); |
| 483 Format(fmt, "%%0%dX", std::numeric_limits<ssize_t>::max()); |
| 484 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
| 485 EXPECT_EQ("000", std::string(buf)); |
| 486 #ifdef NDEBUG |
| 487 Format(fmt, "%%%dX", |
| 488 static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
| 489 EXPECT_EQ(2, Format(buf, fmt, 1)); |
| 490 EXPECT_EQ("%X", std::string(buf)); |
| 491 #endif |
| 492 |
| 493 // Pointer %p |
| 494 EXPECT_EQ(3, Format(buf, "%p", (void*)1)); |
| 495 EXPECT_EQ("0x1", std::string(buf)); |
| 496 EXPECT_EQ(4, Format(buf, "%4p", (void*)1)); |
| 497 EXPECT_EQ(" 0x1", std::string(buf)); |
| 498 EXPECT_EQ(4, Format(buf, "%04p", (void*)1)); |
| 499 EXPECT_EQ("0x01", std::string(buf)); |
| 500 EXPECT_EQ(5, Format(buf, "%4p", (void*)0x111)); |
| 501 EXPECT_EQ("0x111", std::string(buf)); |
| 502 EXPECT_EQ(4, Format(buf, "%-2p", (void*)1)); |
| 503 EXPECT_EQ("%-2p", std::string(buf)); |
| 504 Format(fmt, "%%%dp", std::numeric_limits<ssize_t>::max()); |
| 505 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, |
| 506 FormatN(buf, 4, fmt, (void*)1)); |
| 507 EXPECT_EQ(" ", std::string(buf)); |
| 508 Format(fmt, "%%0%dp", std::numeric_limits<ssize_t>::max()); |
| 509 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, |
| 510 FormatN(buf, 4, fmt, (void*)1)); |
| 511 EXPECT_EQ("0x0", std::string(buf)); |
| 512 #ifdef NDEBUG |
| 513 Format(fmt, "%%%dp", |
| 514 static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
| 515 EXPECT_EQ(2, Format(buf, fmt, 1)); |
| 516 EXPECT_EQ("%p", std::string(buf)); |
| 517 #endif |
| 518 |
| 519 // String |
| 520 EXPECT_EQ(1, Format(buf, "%s", "A")); |
| 521 EXPECT_EQ("A", std::string(buf)); |
| 522 EXPECT_EQ(2, Format(buf, "%2s", "A")); |
| 523 EXPECT_EQ(" A", std::string(buf)); |
| 524 EXPECT_EQ(2, Format(buf, "%02s", "A")); |
| 525 EXPECT_EQ(" A", std::string(buf)); |
| 526 EXPECT_EQ(3, Format(buf, "%2s", "AAA")); |
| 527 EXPECT_EQ("AAA", std::string(buf)); |
| 528 EXPECT_EQ(4, Format(buf, "%-2s", "A")); |
| 529 EXPECT_EQ("%-2s", std::string(buf)); |
| 530 Format(fmt, "%%%ds", std::numeric_limits<ssize_t>::max()); |
| 531 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, "A")); |
| 532 EXPECT_EQ(" ", std::string(buf)); |
| 533 Format(fmt, "%%0%ds", std::numeric_limits<ssize_t>::max()); |
| 534 EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, "A")); |
| 535 EXPECT_EQ(" ", std::string(buf)); |
| 536 #ifdef NDEBUG |
| 537 Format(fmt, "%%%ds", |
| 538 static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
| 539 EXPECT_EQ(2, Format(buf, fmt, "A")); |
| 540 EXPECT_EQ("%s", std::string(buf)); |
| 541 #endif |
| 542 } |
| 543 |
| 544 TEST(FormatTest, EmbeddedNul) { |
| 545 char buf[] = { 'X', 'X', 'X', 'X' }; |
| 546 EXPECT_EQ(2, Format(buf, "%3c", 0)); |
| 547 EXPECT_EQ(' ', buf[0]); |
| 548 EXPECT_EQ(' ', buf[1]); |
| 549 EXPECT_EQ(0, buf[2]); |
| 550 EXPECT_EQ('X', buf[3]); |
| 551 |
| 552 // Check handling of a NUL format character. N.B. this takes two different |
| 553 // code paths depending on whether we are actually passing arguments. If |
| 554 // we don't have any arguments, we are running in the fast-path code, that |
| 555 // looks (almost) like a strncpy(). |
| 556 EXPECT_EQ(2, Format(buf, "%%%")); |
| 557 EXPECT_EQ("%%", std::string(buf)); |
| 558 EXPECT_EQ(2, Format(buf, "%%%", 0)); |
| 559 EXPECT_EQ("%%", std::string(buf)); |
| 560 } |
| 561 |
| 562 TEST(FormatTest, EmitNULL) { |
| 563 char buf[40]; |
| 564 #ifdef __GNUC__ |
| 565 #pragma GCC diagnostic push |
| 566 #pragma GCC diagnostic ignored "-Wconversion-null" |
| 567 #endif |
| 568 EXPECT_EQ(1, Format(buf, "%d", NULL)); |
| 569 EXPECT_EQ("0", std::string(buf)); |
| 570 EXPECT_EQ(3, Format(buf, "%p", NULL)); |
| 571 EXPECT_EQ("0x0", std::string(buf)); |
| 572 EXPECT_EQ(6, Format(buf, "%s", NULL)); |
| 573 EXPECT_EQ("<NULL>", std::string(buf)); |
| 574 #ifdef __GCC__ |
| 575 #pragma GCC diagnostic pop |
| 576 #endif |
| 577 } |
| 578 |
| 579 TEST(FormatTest, PointerSize) { |
| 580 // The internal data representation is a 64bit value, independent of the |
| 581 // native word size. We want to perform sign-extension for signed integers, |
| 582 // but we want to avoid doing so for pointer types. This could be a |
| 583 // problem on systems, where pointers are only 32bit. This tests verifies |
| 584 // that there is no such problem. |
| 585 char *str = reinterpret_cast<char *>(0x80000000u); |
| 586 void *ptr = str; |
| 587 char buf[40]; |
| 588 EXPECT_EQ(10, Format(buf, "%p", str)); |
| 589 EXPECT_EQ("0x80000000", std::string(buf)); |
| 590 EXPECT_EQ(10, Format(buf, "%p", ptr)); |
| 591 EXPECT_EQ("0x80000000", std::string(buf)); |
| 592 } |
| 593 |
| 594 } // namespace debug |
| 595 } // namespace base |
OLD | NEW |