Add Android headless preset and parser tests

src/foundation/parse.cpp

@@ -0,0 +1,37 @@
+#include "foundation/parse.h"
+
+#include <charconv>
+
+namespace pp::foundation {
+
+Result<std::uint32_t> parse_u32(std::string_view text) noexcept
+{
+    if (text.empty()) {
+        return Result<std::uint32_t>::failure(
+            Status::invalid_argument("value must not be empty"));
+    }
+
+    if (text.front() == '-' || text.front() == '+') {
+        return Result<std::uint32_t>::failure(
+            Status::invalid_argument("value must be an unsigned integer without a sign"));
+    }
+
+    std::uint32_t value = 0;
+    const auto* begin = text.data();
+    const auto* end = text.data() + text.size();
+    const auto [ptr, ec] = std::from_chars(begin, end, value);
+
+    if (ec == std::errc::result_out_of_range) {
+        return Result<std::uint32_t>::failure(
+            Status::out_of_range("value is outside the uint32 range"));
+    }
+
+    if (ec != std::errc {} || ptr != end) {
+        return Result<std::uint32_t>::failure(
+            Status::invalid_argument("value must contain only decimal digits"));
+    }
+
+    return Result<std::uint32_t>::success(value);
+}
+
+}