1 files changed, 116 insertions, 0 deletions
diff --git a/thirdparty/ryml/tools/parse_emit.cpp b/thirdparty/ryml/tools/parse_emit.cpp
new file mode 100644
index 000000000..6ae807964
--- /dev/null
+++ b/thirdparty/ryml/tools/parse_emit.cpp
@@ -0,0 +1,116 @@
+#ifdef RYML_SINGLE_HEADER
+#include <ryml_all.hpp>
+#else
+#include <c4/yml/std/std.hpp>
+#include <c4/yml/parse.hpp>
+#include <c4/yml/emit.hpp>
+#endif
+#include <c4/fs/fs.hpp>
+
+#include <cstdio>
+#include <chrono>
+
+
+using namespace c4;
+
+
+//-----------------------------------------------------------------------------
+
+struct timed_section
+{
+    using myclock = std::chrono::steady_clock;
+    using msecs = std::chrono::duration<double, std::milli>;
+
+    csubstr name;
+    myclock::time_point start;
+
+    msecs since() const { return myclock::now() - start; }
+    timed_section(csubstr n) : name(n), start(myclock::now()) {}
+    ~timed_section()
+    {
+        fprintf(stderr, "%.6fms: %.*s\n", since().count(), (int)name.len, name.str);
+        fflush(stderr);
+    }
+};
+
+#define TS(name) timed_section name##__##__LINE__(#name)
+
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+int main(int argc, const char *argv[])
+{
+    bool print_emitted_to_stdout = true;
+    csubstr file;
+    // LCOV_EXCL_START
+    auto show_usage = [argv]{
+        printf("usage: %s [-s] <path/to/file.yaml>\n", argv[0]);
+    };
+    if(argc == 2)
+    {
+        file = to_csubstr(argv[1]);
+    }
+    else if(argc > 2)
+    {
+        file = to_csubstr(argv[2]);
+        csubstr arg = to_csubstr(argv[1]);
+        if(arg == "-s")
+        {
+            print_emitted_to_stdout = false;
+        }
+        else
+        {
+            show_usage();
+            return 1;
+        }
+    }
+    else
+    {
+        show_usage();
+        return 1;
+    }
+    // LCOV_EXCL_STOP
+
+    TS(TOTAL);
+
+    C4_CHECK_MSG(fs::path_exists(file.str), "cannot find file: %s (cwd=%s)", file.str, fs::cwd<std::string>().c_str());
+
+    {
+        TS(objects);
+        std::string contents, output;
+        yml::Tree tree;
+        {
+            TS(read_file);
+            fs::file_get_contents(file.str, &contents);
+        }
+        {
+            TS(tree_reserve);
+            size_t nlines;
+            {
+                TS(count_lines);
+                nlines = to_csubstr(contents).count('\n');
+            }
+            fprintf(stderr, "reserving #lines=%zu\n", nlines);
+            tree.reserve(nlines);
+        }
+        {
+            TS(parse_yml);
+            yml::parse_in_place(file, to_substr(contents), &tree);
+        }
+        {
+            TS(emit_to_buffer);
+            output.resize(contents.size()); // resize, not just reserve
+            yml::emitrs_yaml(tree, &output);
+        }
+        if(print_emitted_to_stdout)
+        {
+            TS(print_stdout);
+            fwrite(output.data(), 1, output.size(), stdout);
+            putchar('\n');
+        }
+    }
+
+    return 0;
+}