626 lines
21 KiB
C++
626 lines
21 KiB
C++
// Formatting library for C++ - printf tests
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include "fmt/printf.h"
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#include <cctype>
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#include <climits>
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#include <cstring>
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#include "fmt/core.h"
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#include "gtest-extra.h"
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#include "util.h"
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using fmt::format;
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using fmt::format_error;
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using fmt::internal::max_value;
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const unsigned BIG_NUM = INT_MAX + 1u;
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// Makes format string argument positional.
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static std::string make_positional(fmt::string_view format) {
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std::string s(format.data(), format.size());
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s.replace(s.find('%'), 1, "%1$");
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return s;
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}
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static std::wstring make_positional(fmt::wstring_view format) {
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std::wstring s(format.data(), format.size());
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s.replace(s.find(L'%'), 1, L"%1$");
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return s;
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}
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// A wrapper around fmt::sprintf to workaround bogus warnings about invalid
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// format strings in MSVC.
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template <typename... Args>
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std::string test_sprintf(fmt::string_view format, const Args&... args) {
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return fmt::sprintf(format, args...);
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}
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template <typename... Args>
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std::wstring test_sprintf(fmt::wstring_view format, const Args&... args) {
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return fmt::sprintf(format, args...);
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}
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#define EXPECT_PRINTF(expected_output, format, arg) \
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EXPECT_EQ(expected_output, test_sprintf(format, arg)) \
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<< "format: " << format; \
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EXPECT_EQ(expected_output, fmt::sprintf(make_positional(format), arg))
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TEST(PrintfTest, NoArgs) {
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EXPECT_EQ("test", test_sprintf("test"));
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EXPECT_EQ(L"test", fmt::sprintf(L"test"));
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}
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TEST(PrintfTest, Escape) {
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EXPECT_EQ("%", test_sprintf("%%"));
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EXPECT_EQ("before %", test_sprintf("before %%"));
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EXPECT_EQ("% after", test_sprintf("%% after"));
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EXPECT_EQ("before % after", test_sprintf("before %% after"));
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EXPECT_EQ("%s", test_sprintf("%%s"));
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EXPECT_EQ(L"%", fmt::sprintf(L"%%"));
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EXPECT_EQ(L"before %", fmt::sprintf(L"before %%"));
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EXPECT_EQ(L"% after", fmt::sprintf(L"%% after"));
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EXPECT_EQ(L"before % after", fmt::sprintf(L"before %% after"));
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EXPECT_EQ(L"%s", fmt::sprintf(L"%%s"));
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}
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TEST(PrintfTest, PositionalArgs) {
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EXPECT_EQ("42", test_sprintf("%1$d", 42));
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EXPECT_EQ("before 42", test_sprintf("before %1$d", 42));
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EXPECT_EQ("42 after", test_sprintf("%1$d after", 42));
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EXPECT_EQ("before 42 after", test_sprintf("before %1$d after", 42));
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EXPECT_EQ("answer = 42", test_sprintf("%1$s = %2$d", "answer", 42));
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EXPECT_EQ("42 is the answer", test_sprintf("%2$d is the %1$s", "answer", 42));
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EXPECT_EQ("abracadabra", test_sprintf("%1$s%2$s%1$s", "abra", "cad"));
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}
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TEST(PrintfTest, AutomaticArgIndexing) {
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EXPECT_EQ("abc", test_sprintf("%c%c%c", 'a', 'b', 'c'));
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}
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TEST(PrintfTest, NumberIsTooBigInArgIndex) {
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EXPECT_THROW_MSG(test_sprintf(format("%{}$", BIG_NUM)), format_error,
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"number is too big");
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EXPECT_THROW_MSG(test_sprintf(format("%{}$d", BIG_NUM)), format_error,
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"number is too big");
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}
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TEST(PrintfTest, SwitchArgIndexing) {
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EXPECT_THROW_MSG(test_sprintf("%1$d%", 1, 2), format_error,
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"cannot switch from manual to automatic argument indexing");
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EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", BIG_NUM), 1, 2),
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format_error, "number is too big");
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EXPECT_THROW_MSG(test_sprintf("%1$d%d", 1, 2), format_error,
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"cannot switch from manual to automatic argument indexing");
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EXPECT_THROW_MSG(test_sprintf("%d%1$", 1, 2), format_error,
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"cannot switch from automatic to manual argument indexing");
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EXPECT_THROW_MSG(test_sprintf(format("%d%{}$d", BIG_NUM), 1, 2), format_error,
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"number is too big");
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EXPECT_THROW_MSG(test_sprintf("%d%1$d", 1, 2), format_error,
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"cannot switch from automatic to manual argument indexing");
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// Indexing errors override width errors.
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EXPECT_THROW_MSG(test_sprintf(format("%d%1${}d", BIG_NUM), 1, 2),
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format_error, "number is too big");
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EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", BIG_NUM), 1, 2),
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format_error, "number is too big");
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}
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TEST(PrintfTest, InvalidArgIndex) {
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EXPECT_THROW_MSG(test_sprintf("%0$d", 42), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf("%2$d", 42), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf(format("%{}$d", INT_MAX), 42), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf("%2$", 42), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf(format("%{}$d", BIG_NUM), 42), format_error,
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"number is too big");
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}
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TEST(PrintfTest, DefaultAlignRight) {
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EXPECT_PRINTF(" 42", "%5d", 42);
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EXPECT_PRINTF(" abc", "%5s", "abc");
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}
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TEST(PrintfTest, ZeroFlag) {
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EXPECT_PRINTF("00042", "%05d", 42);
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EXPECT_PRINTF("-0042", "%05d", -42);
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EXPECT_PRINTF("00042", "%05d", 42);
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EXPECT_PRINTF("-0042", "%05d", -42);
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EXPECT_PRINTF("-004.2", "%06g", -4.2);
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EXPECT_PRINTF("+00042", "%00+6d", 42);
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// '0' flag is ignored for non-numeric types.
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EXPECT_PRINTF("0000x", "%05c", 'x');
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}
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TEST(PrintfTest, PlusFlag) {
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EXPECT_PRINTF("+42", "%+d", 42);
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EXPECT_PRINTF("-42", "%+d", -42);
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EXPECT_PRINTF("+0042", "%+05d", 42);
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EXPECT_PRINTF("+0042", "%0++5d", 42);
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// '+' flag is ignored for non-numeric types.
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EXPECT_PRINTF("x", "%+c", 'x');
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}
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TEST(PrintfTest, MinusFlag) {
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EXPECT_PRINTF("abc ", "%-5s", "abc");
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EXPECT_PRINTF("abc ", "%0--5s", "abc");
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}
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TEST(PrintfTest, SpaceFlag) {
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EXPECT_PRINTF(" 42", "% d", 42);
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EXPECT_PRINTF("-42", "% d", -42);
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EXPECT_PRINTF(" 0042", "% 05d", 42);
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EXPECT_PRINTF(" 0042", "%0 5d", 42);
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// ' ' flag is ignored for non-numeric types.
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EXPECT_PRINTF("x", "% c", 'x');
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}
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TEST(PrintfTest, HashFlag) {
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EXPECT_PRINTF("042", "%#o", 042);
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EXPECT_PRINTF(fmt::format("0{:o}", static_cast<unsigned>(-042)), "%#o", -042);
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EXPECT_PRINTF("0", "%#o", 0);
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EXPECT_PRINTF("0x42", "%#x", 0x42);
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EXPECT_PRINTF("0X42", "%#X", 0x42);
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EXPECT_PRINTF(fmt::format("0x{:x}", static_cast<unsigned>(-0x42)), "%#x",
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-0x42);
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EXPECT_PRINTF("0", "%#x", 0);
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EXPECT_PRINTF("0x0042", "%#06x", 0x42);
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EXPECT_PRINTF("0x0042", "%0##6x", 0x42);
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EXPECT_PRINTF("-42.000000", "%#f", -42.0);
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EXPECT_PRINTF("-42.000000", "%#F", -42.0);
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char buffer[BUFFER_SIZE];
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safe_sprintf(buffer, "%#e", -42.0);
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EXPECT_PRINTF(buffer, "%#e", -42.0);
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safe_sprintf(buffer, "%#E", -42.0);
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EXPECT_PRINTF(buffer, "%#E", -42.0);
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EXPECT_PRINTF("-42.0000", "%#g", -42.0);
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EXPECT_PRINTF("-42.0000", "%#G", -42.0);
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safe_sprintf(buffer, "%#a", 16.0);
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EXPECT_PRINTF(buffer, "%#a", 16.0);
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safe_sprintf(buffer, "%#A", 16.0);
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EXPECT_PRINTF(buffer, "%#A", 16.0);
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// '#' flag is ignored for non-numeric types.
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EXPECT_PRINTF("x", "%#c", 'x');
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}
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TEST(PrintfTest, Width) {
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EXPECT_PRINTF(" abc", "%5s", "abc");
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// Width cannot be specified twice.
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EXPECT_THROW_MSG(test_sprintf("%5-5d", 42), format_error,
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"invalid type specifier");
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EXPECT_THROW_MSG(test_sprintf(format("%{}d", BIG_NUM), 42), format_error,
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"number is too big");
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EXPECT_THROW_MSG(test_sprintf(format("%1${}d", BIG_NUM), 42), format_error,
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"number is too big");
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}
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TEST(PrintfTest, DynamicWidth) {
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EXPECT_EQ(" 42", test_sprintf("%*d", 5, 42));
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EXPECT_EQ("42 ", test_sprintf("%*d", -5, 42));
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EXPECT_THROW_MSG(test_sprintf("%*d", 5.0, 42), format_error,
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"width is not integer");
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EXPECT_THROW_MSG(test_sprintf("%*d"), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf("%*d", BIG_NUM, 42), format_error,
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"number is too big");
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}
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TEST(PrintfTest, IntPrecision) {
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EXPECT_PRINTF("00042", "%.5d", 42);
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EXPECT_PRINTF("-00042", "%.5d", -42);
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EXPECT_PRINTF("00042", "%.5x", 0x42);
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EXPECT_PRINTF("0x00042", "%#.5x", 0x42);
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EXPECT_PRINTF("00042", "%.5o", 042);
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EXPECT_PRINTF("00042", "%#.5o", 042);
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EXPECT_PRINTF(" 00042", "%7.5d", 42);
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EXPECT_PRINTF(" 00042", "%7.5x", 0x42);
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EXPECT_PRINTF(" 0x00042", "%#10.5x", 0x42);
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EXPECT_PRINTF(" 00042", "%7.5o", 042);
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EXPECT_PRINTF(" 00042", "%#10.5o", 042);
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EXPECT_PRINTF("00042 ", "%-7.5d", 42);
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EXPECT_PRINTF("00042 ", "%-7.5x", 0x42);
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EXPECT_PRINTF("0x00042 ", "%-#10.5x", 0x42);
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EXPECT_PRINTF("00042 ", "%-7.5o", 042);
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EXPECT_PRINTF("00042 ", "%-#10.5o", 042);
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}
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TEST(PrintfTest, FloatPrecision) {
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char buffer[BUFFER_SIZE];
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safe_sprintf(buffer, "%.3e", 1234.5678);
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EXPECT_PRINTF(buffer, "%.3e", 1234.5678);
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EXPECT_PRINTF("1234.568", "%.3f", 1234.5678);
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EXPECT_PRINTF("1.23e+03", "%.3g", 1234.5678);
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safe_sprintf(buffer, "%.3a", 1234.5678);
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EXPECT_PRINTF(buffer, "%.3a", 1234.5678);
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}
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TEST(PrintfTest, IgnorePrecisionForNonNumericArg) {
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EXPECT_PRINTF("abc", "%.5s", "abc");
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}
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TEST(PrintfTest, DynamicPrecision) {
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EXPECT_EQ("00042", test_sprintf("%.*d", 5, 42));
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EXPECT_EQ("42", test_sprintf("%.*d", -5, 42));
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EXPECT_THROW_MSG(test_sprintf("%.*d", 5.0, 42), format_error,
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"precision is not integer");
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EXPECT_THROW_MSG(test_sprintf("%.*d"), format_error,
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"argument not found");
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EXPECT_THROW_MSG(test_sprintf("%.*d", BIG_NUM, 42), format_error,
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"number is too big");
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if (sizeof(long long) != sizeof(int)) {
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long long prec = static_cast<long long>(INT_MIN) - 1;
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EXPECT_THROW_MSG(test_sprintf("%.*d", prec, 42), format_error,
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"number is too big");
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}
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}
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template <typename T> struct make_signed { typedef T type; };
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#define SPECIALIZE_MAKE_SIGNED(T, S) \
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template <> struct make_signed<T> { typedef S type; }
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SPECIALIZE_MAKE_SIGNED(char, signed char);
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SPECIALIZE_MAKE_SIGNED(unsigned char, signed char);
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SPECIALIZE_MAKE_SIGNED(unsigned short, short);
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SPECIALIZE_MAKE_SIGNED(unsigned, int);
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SPECIALIZE_MAKE_SIGNED(unsigned long, long);
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SPECIALIZE_MAKE_SIGNED(unsigned long long, long long);
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// Test length format specifier ``length_spec``.
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template <typename T, typename U>
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void TestLength(const char* length_spec, U value) {
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long long signed_value = 0;
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unsigned long long unsigned_value = 0;
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// Apply integer promotion to the argument.
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unsigned long long max = max_value<U>();
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using fmt::internal::const_check;
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if (const_check(max <= static_cast<unsigned>(max_value<int>()))) {
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signed_value = static_cast<int>(value);
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unsigned_value = static_cast<unsigned long long>(value);
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} else if (const_check(max <= max_value<unsigned>())) {
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signed_value = static_cast<unsigned>(value);
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unsigned_value = static_cast<unsigned long long>(value);
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}
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if (sizeof(U) <= sizeof(int) && sizeof(int) < sizeof(T)) {
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signed_value = static_cast<long long>(value);
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unsigned_value = static_cast<unsigned long long>(
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static_cast<typename std::make_unsigned<unsigned>::type>(value));
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} else {
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signed_value = static_cast<typename make_signed<T>::type>(value);
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unsigned_value = static_cast<typename std::make_unsigned<T>::type>(value);
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}
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std::ostringstream os;
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os << signed_value;
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EXPECT_PRINTF(os.str(), fmt::format("%{}d", length_spec), value);
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EXPECT_PRINTF(os.str(), fmt::format("%{}i", length_spec), value);
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os.str("");
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os << unsigned_value;
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EXPECT_PRINTF(os.str(), fmt::format("%{}u", length_spec), value);
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os.str("");
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os << std::oct << unsigned_value;
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EXPECT_PRINTF(os.str(), fmt::format("%{}o", length_spec), value);
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os.str("");
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os << std::hex << unsigned_value;
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EXPECT_PRINTF(os.str(), fmt::format("%{}x", length_spec), value);
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os.str("");
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os << std::hex << std::uppercase << unsigned_value;
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EXPECT_PRINTF(os.str(), fmt::format("%{}X", length_spec), value);
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}
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template <typename T> void TestLength(const char* length_spec) {
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T min = std::numeric_limits<T>::min(), max = max_value<T>();
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TestLength<T>(length_spec, 42);
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TestLength<T>(length_spec, -42);
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TestLength<T>(length_spec, min);
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TestLength<T>(length_spec, max);
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long long long_long_min = std::numeric_limits<long long>::min();
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if (static_cast<long long>(min) > long_long_min)
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TestLength<T>(length_spec, static_cast<long long>(min) - 1);
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unsigned long long long_long_max = max_value<long long>();
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if (static_cast<unsigned long long>(max) < long_long_max)
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TestLength<T>(length_spec, static_cast<long long>(max) + 1);
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TestLength<T>(length_spec, std::numeric_limits<short>::min());
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TestLength<T>(length_spec, max_value<unsigned short>());
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TestLength<T>(length_spec, std::numeric_limits<int>::min());
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TestLength<T>(length_spec, max_value<int>());
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TestLength<T>(length_spec, std::numeric_limits<unsigned>::min());
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TestLength<T>(length_spec, max_value<unsigned>());
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TestLength<T>(length_spec, std::numeric_limits<long long>::min());
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TestLength<T>(length_spec, max_value<long long>());
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TestLength<T>(length_spec, std::numeric_limits<unsigned long long>::min());
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TestLength<T>(length_spec, max_value<unsigned long long>());
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}
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TEST(PrintfTest, Length) {
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TestLength<char>("hh");
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TestLength<signed char>("hh");
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TestLength<unsigned char>("hh");
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TestLength<short>("h");
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TestLength<unsigned short>("h");
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TestLength<long>("l");
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TestLength<unsigned long>("l");
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TestLength<long long>("ll");
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TestLength<unsigned long long>("ll");
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TestLength<intmax_t>("j");
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TestLength<std::size_t>("z");
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TestLength<std::ptrdiff_t>("t");
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long double max = max_value<long double>();
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EXPECT_PRINTF(fmt::format("{:.6}", max), "%g", max);
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EXPECT_PRINTF(fmt::format("{:.6}", max), "%Lg", max);
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}
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TEST(PrintfTest, Bool) {
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EXPECT_PRINTF("1", "%d", true);
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EXPECT_PRINTF("true", "%s", true);
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}
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TEST(PrintfTest, Int) {
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EXPECT_PRINTF("-42", "%d", -42);
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EXPECT_PRINTF("-42", "%i", -42);
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unsigned u = 0 - 42u;
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EXPECT_PRINTF(fmt::format("{}", u), "%u", -42);
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EXPECT_PRINTF(fmt::format("{:o}", u), "%o", -42);
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EXPECT_PRINTF(fmt::format("{:x}", u), "%x", -42);
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EXPECT_PRINTF(fmt::format("{:X}", u), "%X", -42);
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}
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TEST(PrintfTest, long_long) {
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// fmt::printf allows passing long long arguments to %d without length
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// specifiers.
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long long max = max_value<long long>();
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EXPECT_PRINTF(fmt::format("{}", max), "%d", max);
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}
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TEST(PrintfTest, Float) {
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EXPECT_PRINTF("392.650000", "%f", 392.65);
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EXPECT_PRINTF("392.65", "%.2f", 392.65);
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EXPECT_PRINTF("392.6", "%.1f", 392.65);
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EXPECT_PRINTF("393", "%.f", 392.65);
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EXPECT_PRINTF("392.650000", "%F", 392.65);
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char buffer[BUFFER_SIZE];
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safe_sprintf(buffer, "%e", 392.65);
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EXPECT_PRINTF(buffer, "%e", 392.65);
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safe_sprintf(buffer, "%E", 392.65);
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EXPECT_PRINTF(buffer, "%E", 392.65);
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EXPECT_PRINTF("392.65", "%g", 392.65);
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EXPECT_PRINTF("392.65", "%G", 392.65);
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EXPECT_PRINTF("392", "%g", 392.0);
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EXPECT_PRINTF("392", "%G", 392.0);
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EXPECT_PRINTF("4.56e-07", "%g", 0.000000456);
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safe_sprintf(buffer, "%a", -392.65);
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EXPECT_EQ(buffer, format("{:a}", -392.65));
|
|
safe_sprintf(buffer, "%A", -392.65);
|
|
EXPECT_EQ(buffer, format("{:A}", -392.65));
|
|
}
|
|
|
|
TEST(PrintfTest, Inf) {
|
|
double inf = std::numeric_limits<double>::infinity();
|
|
for (const char* type = "fega"; *type; ++type) {
|
|
EXPECT_PRINTF("inf", fmt::format("%{}", *type), inf);
|
|
char upper = static_cast<char>(std::toupper(*type));
|
|
EXPECT_PRINTF("INF", fmt::format("%{}", upper), inf);
|
|
}
|
|
}
|
|
|
|
TEST(PrintfTest, Char) {
|
|
EXPECT_PRINTF("x", "%c", 'x');
|
|
int max = max_value<int>();
|
|
EXPECT_PRINTF(fmt::format("{}", static_cast<char>(max)), "%c", max);
|
|
// EXPECT_PRINTF("x", "%lc", L'x');
|
|
EXPECT_PRINTF(L"x", L"%c", L'x');
|
|
EXPECT_PRINTF(fmt::format(L"{}", static_cast<wchar_t>(max)), L"%c", max);
|
|
}
|
|
|
|
TEST(PrintfTest, String) {
|
|
EXPECT_PRINTF("abc", "%s", "abc");
|
|
const char* null_str = nullptr;
|
|
EXPECT_PRINTF("(null)", "%s", null_str);
|
|
EXPECT_PRINTF(" (null)", "%10s", null_str);
|
|
EXPECT_PRINTF(L"abc", L"%s", L"abc");
|
|
const wchar_t* null_wstr = nullptr;
|
|
EXPECT_PRINTF(L"(null)", L"%s", null_wstr);
|
|
EXPECT_PRINTF(L" (null)", L"%10s", null_wstr);
|
|
}
|
|
|
|
TEST(PrintfTest, UCharString) {
|
|
unsigned char str[] = "test";
|
|
unsigned char* pstr = str;
|
|
EXPECT_EQ("test", fmt::sprintf("%s", pstr));
|
|
}
|
|
|
|
TEST(PrintfTest, Pointer) {
|
|
int n;
|
|
void* p = &n;
|
|
EXPECT_PRINTF(fmt::format("{}", p), "%p", p);
|
|
p = nullptr;
|
|
EXPECT_PRINTF("(nil)", "%p", p);
|
|
EXPECT_PRINTF(" (nil)", "%10p", p);
|
|
const char* s = "test";
|
|
EXPECT_PRINTF(fmt::format("{:p}", s), "%p", s);
|
|
const char* null_str = nullptr;
|
|
EXPECT_PRINTF("(nil)", "%p", null_str);
|
|
|
|
p = &n;
|
|
EXPECT_PRINTF(fmt::format(L"{}", p), L"%p", p);
|
|
p = nullptr;
|
|
EXPECT_PRINTF(L"(nil)", L"%p", p);
|
|
EXPECT_PRINTF(L" (nil)", L"%10p", p);
|
|
const wchar_t* w = L"test";
|
|
EXPECT_PRINTF(fmt::format(L"{:p}", w), L"%p", w);
|
|
const wchar_t* null_wstr = nullptr;
|
|
EXPECT_PRINTF(L"(nil)", L"%p", null_wstr);
|
|
}
|
|
|
|
TEST(PrintfTest, Location) {
|
|
// TODO: test %n
|
|
}
|
|
|
|
enum test_enum { answer = 42 };
|
|
|
|
TEST(PrintfTest, Enum) {
|
|
EXPECT_PRINTF("42", "%d", answer);
|
|
volatile test_enum volatile_enum = answer;
|
|
EXPECT_PRINTF("42", "%d", volatile_enum);
|
|
}
|
|
|
|
#if FMT_USE_FCNTL
|
|
TEST(PrintfTest, Examples) {
|
|
const char* weekday = "Thursday";
|
|
const char* month = "August";
|
|
int day = 21;
|
|
EXPECT_WRITE(stdout, fmt::printf("%1$s, %3$d %2$s", weekday, month, day),
|
|
"Thursday, 21 August");
|
|
}
|
|
|
|
TEST(PrintfTest, PrintfError) {
|
|
fmt::file read_end, write_end;
|
|
fmt::file::pipe(read_end, write_end);
|
|
int result = fmt::fprintf(read_end.fdopen("r").get(), "test");
|
|
EXPECT_LT(result, 0);
|
|
}
|
|
#endif
|
|
|
|
TEST(PrintfTest, WideString) { EXPECT_EQ(L"abc", fmt::sprintf(L"%s", L"abc")); }
|
|
|
|
TEST(PrintfTest, PrintfCustom) {
|
|
EXPECT_EQ("abc", test_sprintf("%s", TestString("abc")));
|
|
}
|
|
|
|
TEST(PrintfTest, OStream) {
|
|
std::ostringstream os;
|
|
int ret = fmt::fprintf(os, "Don't %s!", "panic");
|
|
EXPECT_EQ("Don't panic!", os.str());
|
|
EXPECT_EQ(12, ret);
|
|
}
|
|
|
|
TEST(PrintfTest, VPrintf) {
|
|
fmt::format_arg_store<fmt::printf_context, int> as{42};
|
|
fmt::basic_format_args<fmt::printf_context> args(as);
|
|
EXPECT_EQ(fmt::vsprintf("%d", args), "42");
|
|
EXPECT_WRITE(stdout, fmt::vprintf("%d", args), "42");
|
|
EXPECT_WRITE(stdout, fmt::vfprintf(stdout, "%d", args), "42");
|
|
EXPECT_WRITE(stdout, fmt::vfprintf(std::cout, "%d", args), "42");
|
|
}
|
|
|
|
template <typename... Args>
|
|
void check_format_string_regression(fmt::string_view s, const Args&... args) {
|
|
fmt::sprintf(s, args...);
|
|
}
|
|
|
|
TEST(PrintfTest, CheckFormatStringRegression) {
|
|
check_format_string_regression("%c%s", 'x', "");
|
|
}
|
|
|
|
TEST(PrintfTest, FixedLargeExponent) {
|
|
EXPECT_EQ("1000000000000000000000", fmt::sprintf("%.*f", -13, 1e21));
|
|
}
|
|
|
|
TEST(PrintfTest, VSPrintfMakeArgsExample) {
|
|
fmt::format_arg_store<fmt::printf_context, int, const char*> as{42,
|
|
"something"};
|
|
fmt::basic_format_args<fmt::printf_context> args(as);
|
|
EXPECT_EQ("[42] something happened", fmt::vsprintf("[%d] %s happened", args));
|
|
auto as2 = fmt::make_printf_args(42, "something");
|
|
fmt::basic_format_args<fmt::printf_context> args2(as2);
|
|
EXPECT_EQ("[42] something happened",
|
|
fmt::vsprintf("[%d] %s happened", args2));
|
|
// The older gcc versions can't cast the return value.
|
|
#if !defined(__GNUC__) || (__GNUC__ > 4)
|
|
EXPECT_EQ("[42] something happened",
|
|
fmt::vsprintf("[%d] %s happened",
|
|
{fmt::make_printf_args(42, "something")}));
|
|
#endif
|
|
}
|
|
|
|
TEST(PrintfTest, VSPrintfMakeWArgsExample) {
|
|
fmt::format_arg_store<fmt::wprintf_context, int, const wchar_t*> as{
|
|
42, L"something"};
|
|
fmt::basic_format_args<fmt::wprintf_context> args(as);
|
|
EXPECT_EQ(L"[42] something happened",
|
|
fmt::vsprintf(L"[%d] %s happened", args));
|
|
auto as2 = fmt::make_wprintf_args(42, L"something");
|
|
fmt::basic_format_args<fmt::wprintf_context> args2(as2);
|
|
EXPECT_EQ(L"[42] something happened",
|
|
fmt::vsprintf(L"[%d] %s happened", args2));
|
|
// the older gcc versions can't cast the return value
|
|
#if !defined(__GNUC__) || (__GNUC__ > 4)
|
|
EXPECT_EQ(L"[42] something happened",
|
|
fmt::vsprintf(L"[%d] %s happened",
|
|
{fmt::make_wprintf_args(42, L"something")}));
|
|
#endif
|
|
}
|
|
|
|
typedef fmt::printf_arg_formatter<fmt::buffer_range<char>> formatter_t;
|
|
typedef fmt::basic_printf_context<formatter_t::iterator, char> context_t;
|
|
|
|
// A custom printf argument formatter that doesn't print `-` for floating-point
|
|
// values rounded to 0.
|
|
class custom_printf_arg_formatter : public formatter_t {
|
|
public:
|
|
using formatter_t::iterator;
|
|
|
|
custom_printf_arg_formatter(formatter_t::iterator iter,
|
|
formatter_t::format_specs& specs, context_t& ctx)
|
|
: formatter_t(iter, specs, ctx) {}
|
|
|
|
using formatter_t::operator();
|
|
|
|
#if FMT_MSC_VER > 0 && FMT_MSC_VER <= 1804
|
|
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
|
|
iterator operator()(T value){
|
|
#else
|
|
iterator operator()(double value) {
|
|
#endif
|
|
// Comparing a float to 0.0 is safe.
|
|
if (round(value * pow(10, specs()->precision)) == 0.0) value = 0;
|
|
return formatter_t::operator()(value);
|
|
}
|
|
}
|
|
;
|
|
|
|
typedef fmt::basic_format_args<context_t> format_args_t;
|
|
|
|
std::string custom_vformat(fmt::string_view format_str, format_args_t args) {
|
|
fmt::memory_buffer buffer;
|
|
fmt::vprintf<custom_printf_arg_formatter>(buffer, format_str, args);
|
|
return std::string(buffer.data(), buffer.size());
|
|
}
|
|
|
|
template <typename... Args>
|
|
std::string custom_format(const char* format_str, const Args&... args) {
|
|
auto va = fmt::make_printf_args(args...);
|
|
return custom_vformat(format_str, {va});
|
|
}
|
|
|
|
TEST(PrintfTest, CustomFormat) {
|
|
EXPECT_EQ("0.00", custom_format("%.2f", -.00001));
|
|
EXPECT_EQ("0.00", custom_format("%.2f", .00001));
|
|
EXPECT_EQ("1.00", custom_format("%.2f", 1.00001));
|
|
EXPECT_EQ("-1.00", custom_format("%.2f", -1.00001));
|
|
}
|