Index: base/debug/format_unittest.cc |
diff --git a/base/debug/format_unittest.cc b/base/debug/format_unittest.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..05bf28d3c8b0438920a5ccf9aee5a59b6db8e32c |
--- /dev/null |
+++ b/base/debug/format_unittest.cc |
@@ -0,0 +1,595 @@ |
+// Copyright (c) 2013 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+// |
+// Author: markus@chromium.org |
+ |
+#include <stdio.h> |
+#include <string.h> |
+ |
+#include <limits> |
+ |
+#include "base/debug/format.h" |
+#include "base/logging.h" |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+namespace base { |
+namespace debug { |
+ |
+TEST(FormatTest, Empty) { |
+ char buf[2] = { 'X', 'X' }; |
+ |
+ // Negative buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, -1, "")); |
+ EXPECT_EQ('X', buf[0]); |
+ EXPECT_EQ('X', buf[1]); |
+ |
+ // Zero buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, 0, "")); |
+ EXPECT_EQ('X', buf[0]); |
+ EXPECT_EQ('X', buf[1]); |
+ |
+ // A one-byte buffer should always print a single NUL byte. |
+ EXPECT_EQ(0, FormatN(buf, 1, "")); |
+ EXPECT_EQ(0, buf[0]); |
+ EXPECT_EQ('X', buf[1]); |
+ buf[0] = 'X'; |
+ |
+ // A larger buffer should leave the trailing bytes unchanged. |
+ EXPECT_EQ(0, FormatN(buf, 2, "")); |
+ EXPECT_EQ(0, buf[0]); |
+ EXPECT_EQ('X', buf[1]); |
+ buf[0] = 'X'; |
+ |
+ // The same test using Format() instead of FormatN(). |
+ EXPECT_EQ(0, Format(buf, "")); |
+ EXPECT_EQ(0, buf[0]); |
+ EXPECT_EQ('X', buf[1]); |
+ buf[0] = 'X'; |
+} |
+ |
+TEST(FormatTest, NoArguments) { |
+ // Output a text message that doesn't require any substitutions. This |
+ // is roughly equivalent to calling strncpy() (but unlike strncpy(), it does |
+ // always add a trailing NUL; it always deduplicates '%' characters). |
+ const char text[] = "hello world"; |
+ char ref[20], buf[20]; |
+ memset(ref, 'X', sizeof(buf)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A negative buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, -1, text)); |
+ EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
+ |
+ // Zero buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, 0, text)); |
+ EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
+ |
+ // A one-byte buffer should always print a single NUL byte. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 1, text)); |
+ EXPECT_EQ(0, buf[0]); |
+ EXPECT_TRUE(!memcmp(buf+1, ref+1, sizeof(buf)-1)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A larger (but limited) buffer should always leave the trailing bytes |
+ // unchanged. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 2, text)); |
+ EXPECT_EQ(text[0], buf[0]); |
+ EXPECT_EQ(0, buf[1]); |
+ EXPECT_TRUE(!memcmp(buf+2, ref+2, sizeof(buf)-2)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A unrestricted buffer length should always leave the trailing bytes |
+ // unchanged. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, |
+ FormatN(buf, sizeof(buf), text)); |
+ EXPECT_EQ(std::string(text), std::string(buf)); |
+ EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
+ sizeof(buf) - sizeof(text))); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // The same test using Format() instead of FormatN(). |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, Format(buf, text)); |
+ EXPECT_EQ(std::string(text), std::string(buf)); |
+ EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
+ sizeof(buf) - sizeof(text))); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // Check for deduplication of '%' percent characters. |
+ EXPECT_EQ(1, Format(buf, "%")); |
+ EXPECT_EQ(1, Format(buf, "%%")); |
+ EXPECT_EQ(2, Format(buf, "%%%")); |
+ EXPECT_EQ(2, Format(buf, "%%%%")); |
+ EXPECT_EQ(2, Format(buf, "%X")); |
+ EXPECT_EQ(2, Format(buf, "%%X")); |
+ EXPECT_EQ(3, Format(buf, "%%%X")); |
+ EXPECT_EQ(3, Format(buf, "%%%%X")); |
+} |
+ |
+TEST(FormatTest, OneArgument) { |
+ // Test basic single-argument single-character substitution. |
+ const char text[] = "hello world"; |
+ const char fmt[] = "hello%cworld"; |
+ char ref[20], buf[20]; |
+ memset(ref, 'X', sizeof(buf)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A negative buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, -1, fmt, ' ')); |
+ EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
+ |
+ // Zero buffer size should always result in an error. |
+ EXPECT_EQ(-1, FormatN(buf, 0, fmt, ' ')); |
+ EXPECT_TRUE(!memcmp(buf, ref, sizeof(buf))); |
+ |
+ // A one-byte buffer should always print a single NUL byte. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 1, fmt, ' ')); |
+ EXPECT_EQ(0, buf[0]); |
+ EXPECT_TRUE(!memcmp(buf+1, ref+1, sizeof(buf)-1)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A larger (but limited) buffer should always leave the trailing bytes |
+ // unchanged. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, FormatN(buf, 2, fmt, ' ')); |
+ EXPECT_EQ(text[0], buf[0]); |
+ EXPECT_EQ(0, buf[1]); |
+ EXPECT_TRUE(!memcmp(buf+2, ref+2, sizeof(buf)-2)); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // A unrestricted buffer length should always leave the trailing bytes |
+ // unchanged. |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, |
+ FormatN(buf, sizeof(buf), fmt, ' ')); |
+ EXPECT_EQ(std::string(text), std::string(buf)); |
+ EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
+ sizeof(buf) - sizeof(text))); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // The same test using Format() instead of FormatN(). |
+ EXPECT_EQ(static_cast<ssize_t>(sizeof(text))-1, Format(buf, fmt, ' ')); |
+ EXPECT_EQ(std::string(text), std::string(buf)); |
+ EXPECT_TRUE(!memcmp(buf + sizeof(text), ref + sizeof(text), |
+ sizeof(buf) - sizeof(text))); |
+ memcpy(buf, ref, sizeof(buf)); |
+ |
+ // Check for deduplication of '%' percent characters. |
+ EXPECT_EQ(1, Format(buf, "%", 0)); |
+ EXPECT_EQ(1, Format(buf, "%%", 0)); |
+ EXPECT_EQ(2, Format(buf, "%%%", 0)); |
+ EXPECT_EQ(2, Format(buf, "%%%%", 0)); |
+ EXPECT_EQ(2, Format(buf, "%Y", 0)); |
+ EXPECT_EQ(2, Format(buf, "%%Y", 0)); |
+ EXPECT_EQ(3, Format(buf, "%%%Y", 0)); |
+ EXPECT_EQ(3, Format(buf, "%%%%Y", 0)); |
+} |
+ |
+#ifdef NDEBUG |
+TEST(FormatTest, MissingArg) { |
+ char buf[20]; |
+ EXPECT_EQ(3, Format(buf, "%c%c", 'A')); |
+ EXPECT_EQ("A%c", std::string(buf)); |
+} |
+#endif |
+ |
+TEST(FormatTest, NArgs) { |
+ // Pre-C++11 compilers have a different code path, that can only print |
+ // up to ten distinct arguments. |
+ // We test both Format() and FormatN(). This makes sure we don't have |
+ // typos in the copy-n-pasted code that is needed to deal with various |
+ // numbers of arguments. |
+ char buf[12]; |
+ EXPECT_EQ(1, Format(buf, "%c", 1)); |
+ EXPECT_EQ("\1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%c%c", 1, 2)); |
+ EXPECT_EQ("\1\2", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%c%c%c", 1, 2, 3)); |
+ EXPECT_EQ("\1\2\3", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%c%c%c%c", 1, 2, 3, 4)); |
+ EXPECT_EQ("\1\2\3\4", std::string(buf)); |
+ EXPECT_EQ(5, Format(buf, "%c%c%c%c%c", 1, 2, 3, 4, 5)); |
+ EXPECT_EQ("\1\2\3\4\5", std::string(buf)); |
+ EXPECT_EQ(6, Format(buf, "%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6)); |
+ EXPECT_EQ("\1\2\3\4\5\6", std::string(buf)); |
+ EXPECT_EQ(7, Format(buf, "%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7", std::string(buf)); |
+ EXPECT_EQ(8, Format(buf, "%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10", std::string(buf)); |
+ EXPECT_EQ(9, Format(buf, "%c%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8, 9)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11", std::string(buf)); |
+ EXPECT_EQ(10, Format(buf, "%c%c%c%c%c%c%c%c%c%c", |
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)); |
+ |
+ // Repeat all the tests with FormatN() instead of Format(). |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12", std::string(buf)); |
+ EXPECT_EQ(1, FormatN(buf, 11, "%c", 1)); |
+ EXPECT_EQ("\1", std::string(buf)); |
+ EXPECT_EQ(2, FormatN(buf, 11, "%c%c", 1, 2)); |
+ EXPECT_EQ("\1\2", std::string(buf)); |
+ EXPECT_EQ(3, FormatN(buf, 11, "%c%c%c", 1, 2, 3)); |
+ EXPECT_EQ("\1\2\3", std::string(buf)); |
+ EXPECT_EQ(4, FormatN(buf, 11, "%c%c%c%c", 1, 2, 3, 4)); |
+ EXPECT_EQ("\1\2\3\4", std::string(buf)); |
+ EXPECT_EQ(5, FormatN(buf, 11, "%c%c%c%c%c", 1, 2, 3, 4, 5)); |
+ EXPECT_EQ("\1\2\3\4\5", std::string(buf)); |
+ EXPECT_EQ(6, FormatN(buf, 11, "%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6)); |
+ EXPECT_EQ("\1\2\3\4\5\6", std::string(buf)); |
+ EXPECT_EQ(7, FormatN(buf, 11, "%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7", std::string(buf)); |
+ EXPECT_EQ(8, FormatN(buf, 11, "%c%c%c%c%c%c%c%c", 1, 2, 3, 4, 5, 6, 7, 8)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10", std::string(buf)); |
+ EXPECT_EQ(9, FormatN(buf, 11, "%c%c%c%c%c%c%c%c%c", |
+ 1, 2, 3, 4, 5, 6, 7, 8, 9)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11", std::string(buf)); |
+ EXPECT_EQ(10, FormatN(buf, 11, "%c%c%c%c%c%c%c%c%c%c", |
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12", std::string(buf)); |
+ |
+ |
+ // C++11 is smart enough to handle variadic template arguments. It can |
+ // deal with arbitrary numbers of arguments. |
+#if __cplusplus >= 201103 // C++11 |
+ EXPECT_EQ(11, Format(buf, "%c%c%c%c%c%c%c%c%c%c%c", |
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12\13", std::string(buf)); |
+ EXPECT_EQ(11, FormatN(buf, 12, "%c%c%c%c%c%c%c%c%c%c%c", |
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)); |
+ EXPECT_EQ("\1\2\3\4\5\6\7\10\11\12\13", std::string(buf)); |
+#endif |
+} |
+ |
+TEST(FormatTest, DataTypes) { |
+ char buf[40]; |
+ |
+ // Bytes |
+ EXPECT_EQ(1, Format(buf, "%d", (uint8_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%d", (uint8_t)-1)); |
+ EXPECT_EQ("255", std::string(buf)); |
+ EXPECT_EQ(1, Format(buf, "%d", (int8_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%d", (int8_t)-1)); |
+ EXPECT_EQ("-1", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%d", (int8_t)-128)); |
+ EXPECT_EQ("-128", std::string(buf)); |
+ |
+ // Half-words |
+ EXPECT_EQ(1, Format(buf, "%d", (uint16_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(5, Format(buf, "%d", (uint16_t)-1)); |
+ EXPECT_EQ("65535", std::string(buf)); |
+ EXPECT_EQ(1, Format(buf, "%d", (int16_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%d", (int16_t)-1)); |
+ EXPECT_EQ("-1", std::string(buf)); |
+ EXPECT_EQ(6, Format(buf, "%d", (int16_t)-32768)); |
+ EXPECT_EQ("-32768", std::string(buf)); |
+ |
+ // Words |
+ EXPECT_EQ(1, Format(buf, "%d", (uint32_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(10, Format(buf, "%d", (uint32_t)-1)); |
+ EXPECT_EQ("4294967295", std::string(buf)); |
+ EXPECT_EQ(1, Format(buf, "%d", (int32_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%d", (int32_t)-1)); |
+ EXPECT_EQ("-1", std::string(buf)); |
+ // Work-around for an limitation of C90 |
+ EXPECT_EQ(11, Format(buf, "%d", (int32_t)-2147483647-1)); |
+ EXPECT_EQ("-2147483648", std::string(buf)); |
+ |
+ // Quads |
+ EXPECT_EQ(1, Format(buf, "%d", (uint64_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(20, Format(buf, "%d", (uint64_t)-1)); |
+ EXPECT_EQ("18446744073709551615", std::string(buf)); |
+ EXPECT_EQ(1, Format(buf, "%d", (int64_t)1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%d", (int64_t)-1)); |
+ EXPECT_EQ("-1", std::string(buf)); |
+ // Work-around for an limitation of C90 |
+ EXPECT_EQ(20, Format(buf, "%d", (int64_t)-9223372036854775807LL-1)); |
+ EXPECT_EQ("-9223372036854775808", std::string(buf)); |
+ |
+ // Strings (both const and mutable). |
+ EXPECT_EQ(4, Format(buf, "test")); |
+ EXPECT_EQ("test", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, buf)); |
+ EXPECT_EQ("test", std::string(buf)); |
+ |
+ // Pointer |
+ char addr[20]; |
+ sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)buf); |
+ Format(buf, "%p", buf); |
+ EXPECT_EQ(std::string(addr), std::string(buf)); |
+ Format(buf, "%p", (const char *)buf); |
+ EXPECT_EQ(std::string(addr), std::string(buf)); |
+ sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)sprintf); |
+ Format(buf, "%p", sprintf); |
+ EXPECT_EQ(std::string(addr), std::string(buf)); |
+ |
+ // Padding for pointers is a little more complicated because of the "0x" |
+ // prefix. Padding with '0' zeros is relatively straight-forward, but |
+ // padding with ' ' spaces requires more effort. |
+ sprintf(addr, "0x%017llX", (unsigned long long)(uintptr_t)buf); |
+ Format(buf, "%019p", buf); |
+ EXPECT_EQ(std::string(addr), std::string(buf)); |
+ sprintf(addr, "0x%llX", (unsigned long long)(uintptr_t)buf); |
+ memset(addr, ' ', |
+ (char *)memmove(addr + sizeof(addr) - strlen(addr) - 1, |
+ addr, strlen(addr)+1) - addr); |
+ Format(buf, "%19p", buf); |
+ EXPECT_EQ(std::string(addr), std::string(buf)); |
+} |
+ |
+namespace { |
+void PrintLongString(char* buf, size_t sz) { |
+ // Output a reasonably complex expression into a limited-size buffer. |
+ // At least one byte is available for writing the NUL character. |
+ CHECK_GT(sz, static_cast<size_t>(0)); |
+ |
+ // Allocate slightly more space, so that we can verify that Format() |
+ // never writes past the end of the buffer. |
+ char *tmp = new char[sz+2]; |
+ memset(tmp, 'X', sz+2); |
+ |
+ // Use Format() to output a complex list of arguments: |
+ // - test padding and truncating %c single characters. |
+ // - test truncating %s simple strings. |
+ // - test mismatching arguments and truncating (for %d != %s). |
+ // - test zero-padding and truncating %x hexadecimal numbers. |
+ // - test outputting and truncating %d MININT. |
+ // - test outputting and truncating %p arbitrary pointer values. |
+ // - test outputting, padding and truncating NULL-pointer %s strings. |
+ size_t needed = FormatN(tmp, sz, |
+#ifdef NDEBUG |
+ "A%2cong %s: %d %010X %d %p%7s", 'l', "string", "", |
+#else |
+ "A%2cong %s: %%d %010X %d %p%7s", 'l', "string", |
+#endif |
+ 0xDEADBEEF, std::numeric_limits<intptr_t>::min(), |
+ PrintLongString, static_cast<char*>(NULL)) + 1; |
+ |
+ // Various sanity checks: |
+ // The numbered of characters needed to print the full string should always |
+ // be bigger or equal to the bytes that have actually been output. |
+ size_t len = strlen(tmp); |
+ CHECK_GE(needed, len+1); |
+ |
+ // The number of characters output should always fit into the buffer that |
+ // was passed into Format(). |
+ CHECK_LT(len, sz); |
+ |
+ // The output is always terminated with a NUL byte (actually, this test is |
+ // always going to pass, as strlen() already verified this) |
+ EXPECT_FALSE(tmp[len]); |
+ |
+ // All trailing bytes are unchanged. |
+ for (size_t i = len+1; i < sz+2; ++i) |
+ EXPECT_EQ('X', tmp[i]); |
+ |
+ // The text that was generated by Format() should always match the |
+ // equivalent text generated by sprintf(). Please note that the format |
+ // string for sprintf() is nor complicated, as it does not have the |
+ // benefit of getting type information from the C++ compiler. |
+ // |
+ // N.B.: It would be so much cleaner to use snprintf(). But unfortunately, |
+ // Visual Studio doesn't support this function, and the work-arounds |
+ // are all really awkward. |
+ char ref[256]; |
+ CHECK_LE(sz, sizeof(ref)); |
+ sprintf(ref, "A long string: %%d 00DEADBEEF %lld 0x%llX <NULL>", |
+ static_cast<long long>(std::numeric_limits<intptr_t>::min()), |
+ (long long)PrintLongString); |
+ ref[sz-1] = '\000'; |
+ |
+ // Compare the output from Format() to the one from sprintf(). |
+ EXPECT_EQ(std::string(ref), std::string(tmp)); |
+ |
+ // We allocated a slightly larger buffer, so that we could perform some |
+ // extra sanity checks. Now that the tests have all passed, we copy the |
+ // data to the output buffer that the caller provided. |
+ memcpy(buf, tmp, len+1); |
+ delete[] tmp; |
+} |
+} // anonymous namespace |
+ |
+TEST(FormatTest, Truncation) { |
+ // We use PrintLongString() to print a complex long string and then |
+ // truncate to all possible lengths. This ends up exercising a lot of |
+ // different code paths in Format() and itoa_r(), as truncation can |
+ // happen in a lot of different states. |
+ char ref[256]; |
+ PrintLongString(ref, sizeof(ref)); |
+ for (size_t i = strlen(ref)+1; i; --i) { |
+ char buf[sizeof(ref)]; |
+ PrintLongString(buf, i); |
+ EXPECT_EQ(std::string(ref, i - 1), std::string(buf)); |
+ } |
+} |
+ |
+TEST(FormatTest, Padding) { |
+ char buf[40], fmt[40]; |
+ |
+ // Chars %c |
+ EXPECT_EQ(1, Format(buf, "%c", 'A')); |
+ EXPECT_EQ("A", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%2c", 'A')); |
+ EXPECT_EQ(" A", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%02c", 'A')); |
+ EXPECT_EQ(" A", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%-2c", 'A')); |
+ EXPECT_EQ("%-2c", std::string(buf)); |
+ Format(fmt, "%%%dc", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, Format(buf, fmt, 'A')); |
+#ifdef NDEBUG |
+ Format(fmt, "%%%dc", |
+ static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
+ EXPECT_EQ(2, Format(buf, fmt, 'A')); |
+ EXPECT_EQ("%c", std::string(buf)); |
+#endif |
+ |
+ // Decimals %d |
+ EXPECT_EQ(1, Format(buf, "%d", 1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%2d", 1)); |
+ EXPECT_EQ(" 1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%02d", 1)); |
+ EXPECT_EQ("01", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%3d", -1)); |
+ EXPECT_EQ(" -1", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%03d", -1)); |
+ EXPECT_EQ("-01", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%2d", 111)); |
+ EXPECT_EQ("111", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%2d", -111)); |
+ EXPECT_EQ("-111", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%-2d", 1)); |
+ EXPECT_EQ("%-2d", std::string(buf)); |
+ Format(fmt, "%%%dd", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
+ EXPECT_EQ(" ", std::string(buf)); |
+ Format(fmt, "%%0%dd", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
+ EXPECT_EQ("000", std::string(buf)); |
+#ifdef NDEBUG |
+ Format(fmt, "%%%dd", |
+ static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
+ EXPECT_EQ(2, Format(buf, fmt, 1)); |
+ EXPECT_EQ("%d", std::string(buf)); |
+#endif |
+ |
+ // Hex %X |
+ EXPECT_EQ(1, Format(buf, "%X", 1)); |
+ EXPECT_EQ("1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%2X", 1)); |
+ EXPECT_EQ(" 1", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%02X", 1)); |
+ EXPECT_EQ("01", std::string(buf)); |
+ EXPECT_EQ(8, Format(buf, "%3X", -1)); |
+ EXPECT_EQ("FFFFFFFF", std::string(buf)); |
+ EXPECT_EQ(8, Format(buf, "%03X", -1)); |
+ EXPECT_EQ("FFFFFFFF", std::string(buf)); |
+ EXPECT_EQ(16, Format(buf, "%3X", -1LL)); |
+ EXPECT_EQ("FFFFFFFFFFFFFFFF", std::string(buf)); |
+ EXPECT_EQ(16, Format(buf, "%03X", -1LL)); |
+ EXPECT_EQ("FFFFFFFFFFFFFFFF", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%2X", 0x111)); |
+ EXPECT_EQ("111", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%-2X", 1)); |
+ EXPECT_EQ("%-2X", std::string(buf)); |
+ Format(fmt, "%%%dX", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
+ EXPECT_EQ(" ", std::string(buf)); |
+ Format(fmt, "%%0%dX", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, 1)); |
+ EXPECT_EQ("000", std::string(buf)); |
+#ifdef NDEBUG |
+ Format(fmt, "%%%dX", |
+ static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
+ EXPECT_EQ(2, Format(buf, fmt, 1)); |
+ EXPECT_EQ("%X", std::string(buf)); |
+#endif |
+ |
+ // Pointer %p |
+ EXPECT_EQ(3, Format(buf, "%p", (void*)1)); |
+ EXPECT_EQ("0x1", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%4p", (void*)1)); |
+ EXPECT_EQ(" 0x1", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%04p", (void*)1)); |
+ EXPECT_EQ("0x01", std::string(buf)); |
+ EXPECT_EQ(5, Format(buf, "%4p", (void*)0x111)); |
+ EXPECT_EQ("0x111", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%-2p", (void*)1)); |
+ EXPECT_EQ("%-2p", std::string(buf)); |
+ Format(fmt, "%%%dp", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, |
+ FormatN(buf, 4, fmt, (void*)1)); |
+ EXPECT_EQ(" ", std::string(buf)); |
+ Format(fmt, "%%0%dp", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, |
+ FormatN(buf, 4, fmt, (void*)1)); |
+ EXPECT_EQ("0x0", std::string(buf)); |
+#ifdef NDEBUG |
+ Format(fmt, "%%%dp", |
+ static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
+ EXPECT_EQ(2, Format(buf, fmt, 1)); |
+ EXPECT_EQ("%p", std::string(buf)); |
+#endif |
+ |
+ // String |
+ EXPECT_EQ(1, Format(buf, "%s", "A")); |
+ EXPECT_EQ("A", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%2s", "A")); |
+ EXPECT_EQ(" A", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%02s", "A")); |
+ EXPECT_EQ(" A", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%2s", "AAA")); |
+ EXPECT_EQ("AAA", std::string(buf)); |
+ EXPECT_EQ(4, Format(buf, "%-2s", "A")); |
+ EXPECT_EQ("%-2s", std::string(buf)); |
+ Format(fmt, "%%%ds", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, "A")); |
+ EXPECT_EQ(" ", std::string(buf)); |
+ Format(fmt, "%%0%ds", std::numeric_limits<ssize_t>::max()); |
+ EXPECT_EQ(std::numeric_limits<ssize_t>::max()-1, FormatN(buf, 4, fmt, "A")); |
+ EXPECT_EQ(" ", std::string(buf)); |
+#ifdef NDEBUG |
+ Format(fmt, "%%%ds", |
+ static_cast<size_t>(std::numeric_limits<ssize_t>::max())+1); |
+ EXPECT_EQ(2, Format(buf, fmt, "A")); |
+ EXPECT_EQ("%s", std::string(buf)); |
+#endif |
+} |
+ |
+TEST(FormatTest, EmbeddedNul) { |
+ char buf[] = { 'X', 'X', 'X', 'X' }; |
+ EXPECT_EQ(2, Format(buf, "%3c", 0)); |
+ EXPECT_EQ(' ', buf[0]); |
+ EXPECT_EQ(' ', buf[1]); |
+ EXPECT_EQ(0, buf[2]); |
+ EXPECT_EQ('X', buf[3]); |
+ |
+ // Check handling of a NUL format character. N.B. this takes two different |
+ // code paths depending on whether we are actually passing arguments. If |
+ // we don't have any arguments, we are running in the fast-path code, that |
+ // looks (almost) like a strncpy(). |
+ EXPECT_EQ(2, Format(buf, "%%%")); |
+ EXPECT_EQ("%%", std::string(buf)); |
+ EXPECT_EQ(2, Format(buf, "%%%", 0)); |
+ EXPECT_EQ("%%", std::string(buf)); |
+} |
+ |
+TEST(FormatTest, EmitNULL) { |
+ char buf[40]; |
+#ifdef __GNUC__ |
+#pragma GCC diagnostic push |
+#pragma GCC diagnostic ignored "-Wconversion-null" |
+#endif |
+ EXPECT_EQ(1, Format(buf, "%d", NULL)); |
+ EXPECT_EQ("0", std::string(buf)); |
+ EXPECT_EQ(3, Format(buf, "%p", NULL)); |
+ EXPECT_EQ("0x0", std::string(buf)); |
+ EXPECT_EQ(6, Format(buf, "%s", NULL)); |
+ EXPECT_EQ("<NULL>", std::string(buf)); |
+#ifdef __GCC__ |
+#pragma GCC diagnostic pop |
+#endif |
+} |
+ |
+TEST(FormatTest, PointerSize) { |
+ // The internal data representation is a 64bit value, independent of the |
+ // native word size. We want to perform sign-extension for signed integers, |
+ // but we want to avoid doing so for pointer types. This could be a |
+ // problem on systems, where pointers are only 32bit. This tests verifies |
+ // that there is no such problem. |
+ char *str = reinterpret_cast<char *>(0x80000000u); |
+ void *ptr = str; |
+ char buf[40]; |
+ EXPECT_EQ(10, Format(buf, "%p", str)); |
+ EXPECT_EQ("0x80000000", std::string(buf)); |
+ EXPECT_EQ(10, Format(buf, "%p", ptr)); |
+ EXPECT_EQ("0x80000000", std::string(buf)); |
+} |
+ |
+} // namespace debug |
+} // namespace base |