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tests: Fix MSVC 2022 build

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Instead of trying to detect if we can safely use random shuffle simply reimplement it ourselves.
The quality of the RNG is not essential for these tests.
This commit is contained in:
Arseny Kapoulkine 2022-02-15 20:23:05 -08:00
parent dd50fa5b45
commit c60ca94cdd
1 changed files with 18 additions and 10 deletions
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28
tests/test_xpath.cpp
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@ -10,14 +10,6 @@
#include <algorithm>
#include <limits>
// std::random_shuffle is deprecated in c++14, is removed in c++17.
#if defined(__cplusplus) && (__cplusplus >= 201402L)
# include <random>
# define PUGIXML_SHUFFLE(rng) std::shuffle(rng.begin(), rng.end(), std::default_random_engine{std::random_device{}()})
#else
# define PUGIXML_SHUFFLE(rng) std::random_shuffle(rng.begin(), rng.end())
#endif
using namespace pugi;
static void load_document_copy(xml_document& doc, const char_t* text)
@ -28,6 +20,22 @@ static void load_document_copy(xml_document& doc, const char_t* text)
doc.append_copy(source.first_child());
}
template <typename T>
static void random_shuffle(std::vector<T>& v)
{
size_t rng = 2147483647;
for (size_t i = v.size() - 1; i > 0; --i)
{
// Fisher-Yates shuffle
size_t j = rng % (i + 1);
std::swap(v[j], v[i]);
// LCG RNG, constants from Numerical Recipes
rng = rng * 1664525 + 1013904223;
}
}
TEST(xpath_allocator_many_pages)
{
std::basic_string<char_t> query = STR("0");
@ -163,7 +171,7 @@ TEST(xpath_sort_random_medium)
xpath_node_set ns = doc.select_nodes(STR("//node() | //@*"));
std::vector<xpath_node> nsv(ns.begin(), ns.end());
PUGIXML_SHUFFLE(nsv);
random_shuffle(nsv);
xpath_node_set copy(&nsv[0], &nsv[0] + nsv.size());
copy.sort();
@ -192,7 +200,7 @@ TEST(xpath_sort_random_large)
xpath_node_set ns = doc.select_nodes(STR("//node() | //@*"));
std::vector<xpath_node> nsv(ns.begin(), ns.end());
PUGIXML_SHUFFLE(nsv);
random_shuffle(nsv);
xpath_node_set copy(&nsv[0], &nsv[0] + nsv.size());
copy.sort();