wasm-port: add native parameter file harness

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_parameter_file_harness.cpp

@@ -0,0 +1,128 @@
+#define private public
+#include "emc/rs274ngc/rs274ngc_interp.hh"
+#undef private
+
+#include <cstdlib>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <unistd.h>
+
+namespace {
+
+std::filesystem::path make_temp_dir()
+{
+    std::string pattern = "/tmp/linuxcnc-params-XXXXXX";
+    char *path = mkdtemp(pattern.data());
+    if (path == nullptr) {
+        std::perror("mkdtemp");
+        std::exit(2);
+    }
+    return path;
+}
+
+void write_file(const std::filesystem::path &path, const std::string &content)
+{
+    std::ofstream out(path);
+    if (!out) {
+        std::cerr << "failed to write " << path << "\n";
+        std::exit(2);
+    }
+    out << content;
+}
+
+std::string read_file(const std::filesystem::path &path)
+{
+    std::ifstream in(path);
+    if (!in) {
+        std::cerr << "failed to read " << path << "\n";
+        std::exit(2);
+    }
+    return std::string(std::istreambuf_iterator<char>(in),
+                       std::istreambuf_iterator<char>());
+}
+
+bool contains(const std::string &haystack, const std::string &needle)
+{
+    return haystack.find(needle) != std::string::npos;
+}
+
+void print_error_text(Interp &interp, const char *prefix, int status)
+{
+    char error_buf[LINELEN] = {0};
+    interp.error_text(status, error_buf, sizeof(error_buf));
+    std::cout << prefix << error_buf << "\n";
+}
+
+}  // namespace
+
+int main()
+{
+    const auto temp_dir = make_temp_dir();
+    const auto parameter_file = temp_dir / "rs274ngc.var";
+    const auto out_of_order_file = temp_dir / "out-of-order.var";
+    const auto missing_required_file = temp_dir / "missing-required.var";
+    const auto missing_file = temp_dir / "does-not-exist.var";
+
+    write_file(parameter_file,
+               "5161 10.5\n"
+               "5162 20.25\n"
+               "5220 1\n"
+               "5221 2.25\n"
+               "5399 44\n"
+               "<_named_param> 123\n");
+
+    write_file(out_of_order_file,
+               "5220 1\n"
+               "5161 2\n");
+
+    write_file(missing_required_file,
+               "5161 3.5\n"
+               "5220 1\n");
+
+    Interp interp;
+    int rc = interp.restore_parameters(parameter_file.c_str());
+    std::cout << "restore_existing=" << rc << "\n";
+    std::cout << "parameter_5161=" << interp._setup.parameters[5161] << "\n";
+    std::cout << "parameter_5162=" << interp._setup.parameters[5162] << "\n";
+    std::cout << "parameter_5220=" << interp._setup.parameters[5220] << "\n";
+    std::cout << "parameter_5221=" << interp._setup.parameters[5221] << "\n";
+    std::cout << "parameter_5399=" << interp._setup.parameters[5399] << "\n";
+
+    rc = interp.restore_parameters(missing_file.c_str());
+    std::cout << "restore_missing_file=" << rc << "\n";
+
+    rc = interp.restore_parameters(out_of_order_file.c_str());
+    std::cout << "restore_out_of_order=" << rc << "\n";
+    if (rc > INTERP_MIN_ERROR) {
+        print_error_text(interp, "restore_out_of_order_error=", rc);
+    }
+
+    Interp missing_required_interp;
+    rc = missing_required_interp.restore_parameters(missing_required_file.c_str());
+    std::cout << "restore_missing_required=" << rc << "\n";
+    std::cout << "missing_required_5161=" << missing_required_interp._setup.parameters[5161] << "\n";
+    std::cout << "missing_required_5162=" << missing_required_interp._setup.parameters[5162] << "\n";
+
+    interp._setup.parameters[5161] = 12.34;
+    interp._setup.parameters[5162] = 56.78;
+    interp._setup.parameters[5220] = 1.0;
+    interp._setup.parameters[5221] = 9.87;
+    interp._setup.parameters[5399] = 66.6;
+
+    rc = interp.save_parameters(parameter_file.c_str(), interp._setup.parameters);
+    std::cout << "save_parameters=" << rc << "\n";
+
+    const std::string saved = read_file(parameter_file);
+    const std::string backup = read_file(parameter_file.string() + RS274NGC_PARAMETER_FILE_BACKUP_SUFFIX);
+    std::cout << "saved_has_5161=" << contains(saved, "5161\t12.340000") << "\n";
+    std::cout << "saved_has_5162=" << contains(saved, "5162\t56.780000") << "\n";
+    std::cout << "saved_has_5221=" << contains(saved, "5221\t9.870000") << "\n";
+    std::cout << "saved_has_5399=" << contains(saved, "5399\t66.600000") << "\n";
+    std::cout << "saved_has_named_param=" << contains(saved, "_named_param") << "\n";
+    std::cout << "backup_has_original_5161=" << contains(backup, "5161 10.5") << "\n";
+
+    std::filesystem::remove_all(temp_dir);
+    return 0;
+}