first commit

nghttp2/third-party/mruby/mrbgems/mruby-test/README.md

@@ -0,0 +1,7 @@
+Running Tests
+=============
+
+To run the tests, execute the following from the project's root directory.
+
+    $ make test
+

nghttp2/third-party/mruby/mrbgems/mruby-test/driver.c

@@ -0,0 +1,309 @@
+/*
+** mrbtest - Test for Embeddable Ruby
+**
+** This program runs Ruby test programs in test/t directory
+** against the current mruby implementation.
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <mruby.h>
+#include <mruby/proc.h>
+#include <mruby/data.h>
+#include <mruby/compile.h>
+#include <mruby/string.h>
+#include <mruby/variable.h>
+#include <mruby/array.h>
+
+extern const uint8_t mrbtest_assert_irep[];
+
+void mrbgemtest_init(mrb_state* mrb);
+void mrb_init_test_vformat(mrb_state* mrb);
+
+/* Print a short remark for the user */
+static void
+print_hint(void)
+{
+  printf("mrbtest - Embeddable Ruby Test\n\n");
+}
+
+static int
+eval_test(mrb_state *mrb)
+{
+  /* evaluate the test */
+  mrb_value result = mrb_funcall(mrb, mrb_top_self(mrb), "report", 0);
+  /* did an exception occur? */
+  if (mrb->exc) {
+    mrb_print_error(mrb);
+    mrb->exc = 0;
+    return EXIT_FAILURE;
+  }
+  else {
+    return mrb_bool(result) ? EXIT_SUCCESS : EXIT_FAILURE;
+  }
+}
+
+/* Implementation of print due to the reason that there might be no print */
+static mrb_value
+t_print(mrb_state *mrb, mrb_value self)
+{
+  mrb_value *argv;
+  mrb_int argc;
+  mrb_int i;
+
+  mrb_get_args(mrb, "*!", &argv, &argc);
+  for (i = 0; i < argc; ++i) {
+    mrb_value s = mrb_obj_as_string(mrb, argv[i]);
+    fwrite(RSTRING_PTR(s), RSTRING_LEN(s), 1, stdout);
+  }
+  fflush(stdout);
+
+  return mrb_nil_value();
+}
+
+#define UNESCAPE(p, endp) ((p) != (endp) && *(p) == '\\' ? (p)+1 : (p))
+#define CHAR_CMP(c1, c2) ((unsigned char)(c1) - (unsigned char)(c2))
+
+static const char *
+str_match_bracket(const char *p, const char *pat_end,
+                  const char *s, const char *str_end)
+{
+  mrb_bool ok = FALSE, negated = FALSE;
+
+  if (p == pat_end) return NULL;
+  if (*p == '!' || *p == '^') {
+    negated = TRUE;
+    ++p;
+  }
+
+  while (*p != ']') {
+    const char *t1 = p;
+    if ((t1 = UNESCAPE(t1, pat_end)) == pat_end) return NULL;
+    if ((p = t1 + 1) == pat_end) return NULL;
+    if (p[0] == '-' && p[1] != ']') {
+      const char *t2 = p + 1;
+      if ((t2 = UNESCAPE(t2, pat_end)) == pat_end) return NULL;
+      p = t2 + 1;
+      if (!ok && CHAR_CMP(*t1, *s) <= 0 && CHAR_CMP(*s, *t2) <= 0) ok = TRUE;
+    }
+    else {
+      if (!ok && CHAR_CMP(*t1, *s) == 0) ok = TRUE;
+    }
+  }
+
+  return ok == negated ? NULL : p + 1;
+}
+
+static mrb_bool
+str_match_no_brace_p(const char *pat, mrb_int pat_len,
+                     const char *str, mrb_int str_len)
+{
+  const char *p = pat, *s = str;
+  const char *pat_end = pat + pat_len, *str_end = str + str_len;
+  const char *p_tmp = NULL, *s_tmp = NULL;
+
+  for (;;) {
+    if (p == pat_end) return s == str_end;
+    switch (*p) {
+      case '*':
+        do { ++p; } while (p != pat_end && *p == '*');
+        if (UNESCAPE(p, pat_end) == pat_end) return TRUE;
+        if (s == str_end) return FALSE;
+        p_tmp = p;
+        s_tmp = s;
+        continue;
+      case '?':
+        if (s == str_end) return FALSE;
+        ++p;
+        ++s;
+        continue;
+      case '[': {
+        const char *t;
+        if (s == str_end) return FALSE;
+        if ((t = str_match_bracket(p+1, pat_end, s, str_end))) {
+          p = t;
+          ++s;
+          continue;
+        }
+        goto L_failed;
+      }
+    }
+
+    /* ordinary */
+    p = UNESCAPE(p, pat_end);
+    if (s == str_end) return p == pat_end;
+    if (p == pat_end) goto L_failed;
+    if (*p++ != *s++) goto L_failed;
+    continue;
+
+    L_failed:
+    if (p_tmp && s_tmp) {
+      /* try next '*' position */
+      p = p_tmp;
+      s = ++s_tmp;
+      continue;
+    }
+
+    return FALSE;
+  }
+}
+
+#define COPY_AND_INC(dst, src, len) \
+  do { memcpy(dst, src, len); dst += len; } while (0)
+
+static mrb_bool
+str_match_p(mrb_state *mrb,
+            const char *pat, mrb_int pat_len,
+            const char *str, mrb_int str_len)
+{
+  const char *p = pat, *pat_end = pat + pat_len;
+  const char *lbrace = NULL, *rbrace = NULL;
+  int nest = 0;
+  mrb_bool ret = FALSE;
+
+  for (; p != pat_end; ++p) {
+    if (*p == '{' && nest++ == 0) lbrace = p;
+    else if (*p == '}' && lbrace && --nest == 0) { rbrace = p; break; }
+    else if (*p == '\\' && ++p == pat_end) break;
+  }
+
+  if (lbrace && rbrace) {
+    /* expand brace */
+    char *ex_pat = (char *)mrb_malloc(mrb, pat_len-2);  /* expanded pattern */
+    char *ex_p = ex_pat;
+
+    COPY_AND_INC(ex_p, pat, lbrace-pat);
+    p = lbrace;
+    while (p < rbrace) {
+      char *orig_ex_p = ex_p;
+      const char *t = ++p;
+      for (nest = 0; p < rbrace && !(*p == ',' && nest == 0); ++p) {
+        if (*p == '{') ++nest;
+        else if (*p == '}') --nest;
+        else if (*p == '\\' && ++p == rbrace) break;
+      }
+      COPY_AND_INC(ex_p, t, p-t);
+      COPY_AND_INC(ex_p, rbrace+1, pat_end-rbrace-1);
+      if ((ret = str_match_p(mrb, ex_pat, ex_p-ex_pat, str, str_len))) break;
+      ex_p = orig_ex_p;
+    }
+    mrb_free(mrb, ex_pat);
+  }
+  else if (!lbrace && !rbrace) {
+    ret = str_match_no_brace_p(pat, pat_len, str, str_len);
+  }
+
+  return ret;
+}
+
+static mrb_value
+m_str_match_p(mrb_state *mrb, mrb_value self)
+{
+  const char *pat, *str;
+  mrb_int pat_len, str_len;
+
+  mrb_get_args(mrb, "ss", &pat, &pat_len, &str, &str_len);
+  return mrb_bool_value(str_match_p(mrb, pat, pat_len, str, str_len));
+}
+
+void
+mrb_init_test_driver(mrb_state *mrb, mrb_bool verbose)
+{
+  struct RClass *krn, *mrbtest;
+
+  krn = mrb->kernel_module;
+  mrb_define_method(mrb, krn, "t_print", t_print, MRB_ARGS_ANY());
+  mrb_define_method(mrb, krn, "_str_match?", m_str_match_p, MRB_ARGS_REQ(2));
+
+  mrbtest = mrb_define_module(mrb, "Mrbtest");
+
+  mrb_define_const(mrb, mrbtest, "FIXNUM_MAX", mrb_fixnum_value(MRB_INT_MAX));
+  mrb_define_const(mrb, mrbtest, "FIXNUM_MIN", mrb_fixnum_value(MRB_INT_MIN));
+  mrb_define_const(mrb, mrbtest, "FIXNUM_BIT", mrb_fixnum_value(MRB_INT_BIT));
+
+#ifndef MRB_WITHOUT_FLOAT
+#ifdef MRB_USE_FLOAT
+  mrb_define_const(mrb, mrbtest, "FLOAT_TOLERANCE", mrb_float_value(mrb, 1e-6));
+#else
+  mrb_define_const(mrb, mrbtest, "FLOAT_TOLERANCE", mrb_float_value(mrb, 1e-12));
+#endif
+#endif
+
+  mrb_init_test_vformat(mrb);
+
+  if (verbose) {
+    mrb_gv_set(mrb, mrb_intern_lit(mrb, "$mrbtest_verbose"), mrb_true_value());
+  }
+}
+
+void
+mrb_t_pass_result(mrb_state *mrb_dst, mrb_state *mrb_src)
+{
+  mrb_value res_src;
+
+  if (mrb_src->exc) {
+    mrb_print_error(mrb_src);
+    exit(EXIT_FAILURE);
+  }
+
+#define TEST_COUNT_PASS(name)                                           \
+  do {                                                                  \
+    res_src = mrb_gv_get(mrb_src, mrb_intern_lit(mrb_src, "$" #name));  \
+    if (mrb_fixnum_p(res_src)) {                                        \
+      mrb_value res_dst = mrb_gv_get(mrb_dst, mrb_intern_lit(mrb_dst, "$" #name)); \
+      mrb_gv_set(mrb_dst, mrb_intern_lit(mrb_dst, "$" #name), mrb_fixnum_value(mrb_fixnum(res_dst) + mrb_fixnum(res_src))); \
+    }                                                                   \
+  } while (FALSE)                                                       \
+
+  TEST_COUNT_PASS(ok_test);
+  TEST_COUNT_PASS(ko_test);
+  TEST_COUNT_PASS(kill_test);
+  TEST_COUNT_PASS(warning_test);
+  TEST_COUNT_PASS(skip_test);
+
+#undef TEST_COUNT_PASS
+
+  res_src = mrb_gv_get(mrb_src, mrb_intern_lit(mrb_src, "$asserts"));
+
+  if (mrb_array_p(res_src)) {
+    mrb_int i;
+    mrb_value res_dst = mrb_gv_get(mrb_dst, mrb_intern_lit(mrb_dst, "$asserts"));
+    for (i = 0; i < RARRAY_LEN(res_src); ++i) {
+      mrb_value val_src = RARRAY_PTR(res_src)[i];
+      mrb_ary_push(mrb_dst, res_dst, mrb_str_new(mrb_dst, RSTRING_PTR(val_src), RSTRING_LEN(val_src)));
+    }
+  }
+}
+
+int
+main(int argc, char **argv)
+{
+  mrb_state *mrb;
+  int ret;
+  mrb_bool verbose = FALSE;
+
+  print_hint();
+
+  /* new interpreter instance */
+  mrb = mrb_open();
+  if (mrb == NULL) {
+    fprintf(stderr, "Invalid mrb_state, exiting test driver");
+    return EXIT_FAILURE;
+  }
+
+  if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'v') {
+    printf("verbose mode: enable\n\n");
+    verbose = TRUE;
+  }
+
+  mrb_init_test_driver(mrb, verbose);
+  mrb_load_irep(mrb, mrbtest_assert_irep);
+  mrbgemtest_init(mrb);
+  ret = eval_test(mrb);
+  mrb_close(mrb);
+
+  return ret;
+}

nghttp2/third-party/mruby/mrbgems/mruby-test/mrbgem.rake

@@ -0,0 +1,187 @@
+MRuby::Gem::Specification.new('mruby-test') do |spec|
+  spec.license = 'MIT'
+  spec.author  = 'mruby developers'
+  spec.summary = 'mruby test'
+
+  build.bins << 'mrbtest'
+  spec.add_dependency('mruby-compiler', :core => 'mruby-compiler')
+
+  spec.test_rbfiles = Dir.glob("#{MRUBY_ROOT}/test/t/*.rb")
+
+  clib = "#{build_dir}/mrbtest.c"
+  mlib = clib.ext(exts.object)
+  exec = exefile("#{build.build_dir}/bin/mrbtest")
+
+  mrbtest_lib = libfile("#{build_dir}/mrbtest")
+  mrbtest_objs = []
+
+  driver_objs = Dir.glob("#{dir}/*.{c,cpp,cxx,cc,m,asm,s,S}").map do |f|
+    objfile(f.relative_path_from(dir).to_s.pathmap("#{build_dir}/%X"))
+  end
+
+  assert_c = "#{build_dir}/assert.c"
+  assert_rb = "#{MRUBY_ROOT}/test/assert.rb"
+  assert_lib = assert_c.ext(exts.object)
+  mrbtest_objs << assert_lib
+
+  file assert_lib => assert_c
+  file assert_c => [assert_rb, build.mrbcfile] do |t|
+    mkdir_p File.dirname(t.name)
+    open(t.name, 'w') do |f|
+      mrbc.run f, assert_rb, 'mrbtest_assert_irep'
+    end
+  end
+
+  gem_table = build.gems.generate_gem_table build
+
+  build.gems.each do |g|
+    test_rbobj = g.test_rbireps.ext(exts.object)
+    g.test_objs << test_rbobj
+    dep_list = build.gems.tsort_dependencies(g.test_dependencies, gem_table).select(&:generate_functions)
+
+    file test_rbobj => g.test_rbireps
+    file g.test_rbireps => [g.test_rbfiles, build.mrbcfile].flatten do |t|
+      mkdir_p File.dirname(t.name)
+      open(t.name, 'w') do |f|
+        g.print_gem_test_header(f)
+        test_preload = g.test_preload and [g.dir, MRUBY_ROOT].map {|dir|
+          File.expand_path(g.test_preload, dir)
+        }.find {|file| File.exist?(file) }
+
+        f.puts %Q[/*]
+        f.puts %Q[ * This file contains a test code for #{g.name} gem.]
+        f.puts %Q[ *]
+        f.puts %Q[ * IMPORTANT:]
+        f.puts %Q[ *   This file was generated!]
+        f.puts %Q[ *   All manual changes will get lost.]
+        f.puts %Q[ */]
+        if test_preload.nil?
+          f.puts %Q[extern const uint8_t mrbtest_assert_irep[];]
+        else
+          g.build.mrbc.run f, test_preload, "gem_test_irep_#{g.funcname}_preload"
+        end
+        g.test_rbfiles.flatten.each_with_index do |rbfile, i|
+          g.build.mrbc.run f, rbfile, "gem_test_irep_#{g.funcname}_#{i}"
+        end
+        f.puts %Q[void mrb_#{g.funcname}_gem_test(mrb_state *mrb);] unless g.test_objs.empty?
+        dep_list.each do |d|
+          f.puts %Q[void GENERATED_TMP_mrb_#{d.funcname}_gem_init(mrb_state *mrb);]
+          f.puts %Q[void GENERATED_TMP_mrb_#{d.funcname}_gem_final(mrb_state *mrb);]
+        end
+        f.puts %Q[void mrb_init_test_driver(mrb_state *mrb, mrb_bool verbose);]
+        f.puts %Q[void mrb_t_pass_result(mrb_state *dst, mrb_state *src);]
+        f.puts %Q[void GENERATED_TMP_mrb_#{g.funcname}_gem_test(mrb_state *mrb) {]
+        unless g.test_rbfiles.empty?
+          f.puts %Q[  mrb_state *mrb2;]
+          unless g.test_args.empty?
+            f.puts %Q[  mrb_value test_args_hash;]
+          end
+          f.puts %Q[  int ai;]
+          g.test_rbfiles.count.times do |i|
+            f.puts %Q[  ai = mrb_gc_arena_save(mrb);]
+            f.puts %Q[  mrb2 = mrb_open_core(mrb_default_allocf, NULL);]
+            f.puts %Q[  if (mrb2 == NULL) {]
+            f.puts %Q[    fprintf(stderr, "Invalid mrb_state, exiting \%s", __FUNCTION__);]
+            f.puts %Q[    exit(EXIT_FAILURE);]
+            f.puts %Q[  }]
+            dep_list.each do |d|
+              f.puts %Q[  GENERATED_TMP_mrb_#{d.funcname}_gem_init(mrb2);]
+              f.puts %Q[  mrb_state_atexit(mrb2, GENERATED_TMP_mrb_#{d.funcname}_gem_final);]
+            end
+            f.puts %Q[  mrb_init_test_driver(mrb2, mrb_test(mrb_gv_get(mrb, mrb_intern_lit(mrb, "$mrbtest_verbose"))));]
+            if test_preload.nil?
+              f.puts %Q[  mrb_load_irep(mrb2, mrbtest_assert_irep);]
+            else
+              f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_preload);]
+            end
+            f.puts %Q[  if (mrb2->exc) {]
+            f.puts %Q[    mrb_print_error(mrb2);]
+            f.puts %Q[    mrb_close(mrb2);]
+            f.puts %Q[    exit(EXIT_FAILURE);]
+            f.puts %Q[  }]
+            f.puts %Q[  mrb_const_set(mrb2, mrb_obj_value(mrb2->object_class), mrb_intern_lit(mrb2, "GEMNAME"), mrb_str_new(mrb2, "#{g.name}", #{g.name.length}));]
+
+            unless g.test_args.empty?
+              f.puts %Q[  test_args_hash = mrb_hash_new_capa(mrb, #{g.test_args.length}); ]
+              g.test_args.each do |arg_name, arg_value|
+                escaped_arg_name = arg_name.gsub('\\', '\\\\\\\\').gsub('"', '\"')
+                escaped_arg_value = arg_value.gsub('\\', '\\\\\\\\').gsub('"', '\"')
+                f.puts %Q[  mrb_hash_set(mrb2, test_args_hash, mrb_str_new(mrb2, "#{escaped_arg_name.to_s}", #{escaped_arg_name.to_s.length}), mrb_str_new(mrb2, "#{escaped_arg_value.to_s}", #{escaped_arg_value.to_s.length})); ]
+              end
+              f.puts %Q[  mrb_const_set(mrb2, mrb_obj_value(mrb2->object_class), mrb_intern_lit(mrb2, "TEST_ARGS"), test_args_hash); ]
+            end
+
+            f.puts %Q[  mrb_#{g.funcname}_gem_test(mrb2);] if g.custom_test_init?
+
+            f.puts %Q[  mrb_load_irep(mrb2, gem_test_irep_#{g.funcname}_#{i});]
+            f.puts %Q[  ]
+
+            f.puts %Q[  mrb_t_pass_result(mrb, mrb2);]
+            f.puts %Q[  mrb_close(mrb2);]
+            f.puts %Q[  mrb_gc_arena_restore(mrb, ai);]
+          end
+        end
+        f.puts %Q[}]
+      end
+    end
+  end
+
+  build.gems.each do |v|
+    mrbtest_objs.concat v.test_objs
+  end
+
+  file mrbtest_lib => mrbtest_objs do |t|
+    build.archiver.run t.name, t.prerequisites
+  end
+
+  unless build.build_mrbtest_lib_only?
+    file exec => [*driver_objs, mlib, mrbtest_lib, build.libmruby_static] do |t|
+      gem_flags = build.gems.map { |g| g.linker.flags }
+      gem_flags_before_libraries = build.gems.map { |g| g.linker.flags_before_libraries }
+      gem_flags_after_libraries = build.gems.map { |g| g.linker.flags_after_libraries }
+      gem_libraries = build.gems.map { |g| g.linker.libraries }
+      gem_library_paths = build.gems.map { |g| g.linker.library_paths }
+      build.linker.run t.name, t.prerequisites, gem_libraries, gem_library_paths, gem_flags,
+                       gem_flags_before_libraries, gem_flags_after_libraries
+    end
+  end
+
+  # store the last gem selection and make the re-build
+  # of the test gem depending on a change to the gem
+  # selection
+  active_gems_path = "#{build_dir}/active_gems_path.lst"
+  active_gem_list = File.read active_gems_path if File.exist? active_gems_path
+  current_gem_list = build.gems.map(&:name).join("\n")
+  task active_gems_path do |_t|
+    mkdir_p File.dirname(active_gems_path)
+    File.write active_gems_path, current_gem_list
+  end
+  file clib => active_gems_path if active_gem_list != current_gem_list
+
+  file mlib => clib
+  file clib => [build.mrbcfile, __FILE__] do |_t|
+    _pp "GEN", "*.rb", "#{clib.relative_path}"
+    mkdir_p File.dirname(clib)
+    open(clib, 'w') do |f|
+      f.puts %Q[/*]
+      f.puts %Q[ * This file contains a list of all]
+      f.puts %Q[ * test functions.]
+      f.puts %Q[ *]
+      f.puts %Q[ * IMPORTANT:]
+      f.puts %Q[ *   This file was generated!]
+      f.puts %Q[ *   All manual changes will get lost.]
+      f.puts %Q[ */]
+      f.puts %Q[]
+      f.puts %Q[struct mrb_state;]
+      f.puts %Q[typedef struct mrb_state mrb_state;]
+      build.gems.each do |g|
+        f.puts %Q[void GENERATED_TMP_mrb_#{g.funcname}_gem_test(mrb_state *mrb);]
+      end
+      f.puts %Q[void mrbgemtest_init(mrb_state* mrb) {]
+      build.gems.each do |g|
+        f.puts %Q[    GENERATED_TMP_mrb_#{g.funcname}_gem_test(mrb);]
+      end
+      f.puts %Q[}]
+    end
+  end
+end

nghttp2/third-party/mruby/mrbgems/mruby-test/vformat.c

@@ -0,0 +1,179 @@
+#include <string.h>
+#include <mruby.h>
+#include <mruby/class.h>
+#include <mruby/data.h>
+#include <mruby/string.h>
+
+/* no argument */
+static mrb_value
+vf_s_format_0(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str;
+  const char *fmt;
+
+  mrb_get_args(mrb, "S", &fmt_str);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+
+  return mrb_format(mrb, fmt);
+}
+
+/* c char */
+static mrb_value
+vf_s_format_c(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str, arg_str;
+  const char *fmt;
+  char c;
+  
+  mrb_get_args(mrb, "SS", &fmt_str, &arg_str);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+  c = RSTRING_CSTR(mrb, arg_str)[0];
+
+  return mrb_format(mrb, fmt, c);
+}
+
+/* d int */
+static mrb_value
+vf_s_format_d(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str;
+  const char *fmt;
+  mrb_int i;
+  int d;
+
+  mrb_get_args(mrb, "Si", &fmt_str, &i);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+  d = (int)i;
+
+  return mrb_format(mrb, fmt, d);
+}
+
+#ifndef MRB_WITHOUT_FLOAT
+/* f float */
+static mrb_value
+vf_s_format_f(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str;
+  const char *fmt;
+  mrb_float f;
+
+  mrb_get_args(mrb, "Sf", &fmt_str, &f);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+
+  return mrb_format(mrb, fmt, f);
+}
+#endif
+
+/* i fixnum */
+static mrb_value
+vf_s_format_i(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str;
+  const char *fmt;
+  mrb_int i;
+
+  mrb_get_args(mrb, "Si", &fmt_str, &i);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+
+  return mrb_format(mrb, fmt, i);
+}
+
+/* l char*, size_t */
+static mrb_value
+vf_s_format_l(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str, arg_str;
+  const char *fmt;
+  const char *s;
+  mrb_int i;
+  size_t len;
+
+  mrb_get_args(mrb, "SSi", &fmt_str, &arg_str, &i);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+  s = RSTRING_PTR(arg_str);
+  len = (size_t)i;
+  if (len > (size_t)RSTRING_LEN(arg_str)) len = (size_t)RSTRING_LEN(arg_str);
+
+  return mrb_format(mrb, fmt, s, len);
+}
+
+/* n symbol */
+static mrb_value
+vf_s_format_n(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str;
+  const char *fmt;
+  mrb_sym sym;
+
+  mrb_get_args(mrb, "Sn", &fmt_str, &sym);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+
+  return mrb_format(mrb, fmt, sym);
+}
+
+/* s char* */
+static mrb_value
+vf_s_format_s(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str, arg_str;
+  const char *fmt;
+  const char *s;
+
+  mrb_get_args(mrb, "SS", &fmt_str, &arg_str);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+  s = RSTRING_CSTR(mrb, arg_str);
+
+  return mrb_format(mrb, fmt, s);
+}
+
+/* C RClass */
+static mrb_value
+vf_s_format_C(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str, arg_cls;
+  const char *fmt;
+  struct RClass *c;
+
+  mrb_get_args(mrb, "SC", &fmt_str, &arg_cls);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+  c = mrb_class_ptr(arg_cls);
+
+  return mrb_format(mrb, fmt, c);
+}
+
+/* v value */
+static mrb_value
+vf_s_format_v(mrb_state *mrb, mrb_value klass)
+{
+  mrb_value fmt_str, arg_v;
+  const char *fmt;
+
+  mrb_get_args(mrb, "So", &fmt_str, &arg_v);
+  fmt = RSTRING_CSTR(mrb, fmt_str);
+
+  return mrb_format(mrb, fmt, arg_v);
+}
+
+void
+mrb_init_test_vformat(mrb_state *mrb)
+{
+  struct RClass *vf;
+
+  vf = mrb_define_module(mrb, "TestVFormat");
+  mrb_define_class_method(mrb, vf, "z", vf_s_format_0, MRB_ARGS_REQ(1));
+
+#define VF_DEFINE_FORMAT_METHOD(t) VF_DEFINE_FORMAT_METHOD_n(t,2)
+#define VF_DEFINE_FORMAT_METHOD_n(t,n) mrb_define_class_method(mrb, vf, #t, vf_s_format_##t, MRB_ARGS_REQ(n));
+  
+  VF_DEFINE_FORMAT_METHOD(c);
+  VF_DEFINE_FORMAT_METHOD(d);
+#ifndef MRB_WITHOUT_FLOAT
+  VF_DEFINE_FORMAT_METHOD(f);
+#endif
+  VF_DEFINE_FORMAT_METHOD(i);
+  VF_DEFINE_FORMAT_METHOD_n(l,3);
+  VF_DEFINE_FORMAT_METHOD(n);
+  VF_DEFINE_FORMAT_METHOD(s);
+  VF_DEFINE_FORMAT_METHOD(C);
+  VF_DEFINE_FORMAT_METHOD(v);
+}