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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// UNSUPPORTED: no-filesystem
// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
// XFAIL: msvc, target={{.+}}-windows-gnu
// XFAIL: availability-fp_to_chars-missing
// <print>
// The FILE returned by fmemopen does not have file descriptor.
// This means the test could fail when the implementation uses a
// function that requires a file descriptor, for example write.
//
// This tests all print functions which takes a FILE* as argument.
// template<class... Args>
// void print(FILE* stream, format_string<Args...> fmt, Args&&... args);
// template<class... Args>
// void println(FILE* stream, format_string<Args...> fmt, Args&&... args);
// void vprint_unicode(FILE* stream, string_view fmt, format_args args);
// void vprint_nonunicode(FILE* stream, string_view fmt, format_args args);
#include <array>
#include <cstdio>
#include <cassert>
#include <print>
static void test_print() {
std::array<char, 100> buffer{0};
FILE* file = fmemopen(buffer.data(), buffer.size(), "wb");
assert(file);
std::print(file, "hello world{}", '!');
long pos = std::ftell(file);
std::fclose(file);
assert(pos > 0);
assert(std::string_view(buffer.data(), pos) == "hello world!");
}
static void test_println() {
std::array<char, 100> buffer{0};
FILE* file = fmemopen(buffer.data(), buffer.size(), "wb");
assert(file);
std::println(file, "hello world{}", '!');
long pos = std::ftell(file);
std::fclose(file);
assert(pos > 0);
assert(std::string_view(buffer.data(), pos) == "hello world!\n");
}
static void test_vprint_unicode() {
std::array<char, 100> buffer{0};
FILE* file = fmemopen(buffer.data(), buffer.size(), "wb");
assert(file);
std::vprint_unicode(file, "hello world{}", std::make_format_args('!'));
long pos = std::ftell(file);
std::fclose(file);
assert(pos > 0);
assert(std::string_view(buffer.data(), pos) == "hello world!");
}
static void test_vprint_nonunicode() {
std::array<char, 100> buffer{0};
FILE* file = fmemopen(buffer.data(), buffer.size(), "wb");
assert(file);
std::vprint_nonunicode(file, "hello world{}", std::make_format_args('!'));
long pos = std::ftell(file);
std::fclose(file);
assert(pos > 0);
assert(std::string_view(buffer.data(), pos) == "hello world!");
}
int main(int, char**) {
test_print();
test_println();
test_vprint_unicode();
test_vprint_nonunicode();
return 0;
}
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