/**********************************************************************

  version.c -

  $Author$
  created at: Thu Sep 30 20:08:01 JST 1993

  Copyright (C) 1993-2007 Yukihiro Matsumoto

**********************************************************************/

#include "internal/cmdlineopt.h"
#include "ruby/ruby.h"
#include "version.h"
#include "vm_core.h"
#include "rjit.h"
#include "yjit.h"
#include <stdio.h>

#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif

#ifdef RUBY_REVISION
# if RUBY_PATCHLEVEL == -1
#  ifndef RUBY_BRANCH_NAME
#   define RUBY_BRANCH_NAME "master"
#  endif
#  define RUBY_REVISION_STR " "RUBY_BRANCH_NAME" "RUBY_REVISION
# else
#  define RUBY_REVISION_STR " revision "RUBY_REVISION
# endif
#else
# define RUBY_REVISION "HEAD"
# define RUBY_REVISION_STR ""
#endif
#if !defined RUBY_RELEASE_DATETIME || RUBY_PATCHLEVEL != -1
# undef RUBY_RELEASE_DATETIME
# define RUBY_RELEASE_DATETIME RUBY_RELEASE_DATE
#endif

# define RUBY_DESCRIPTION_WITH(opt) \
    "ruby " RUBY_VERSION RUBY_PATCHLEVEL_STR " " \
    "(" RUBY_RELEASE_DATETIME RUBY_REVISION_STR ")" opt " " \
    "[" RUBY_PLATFORM "]"

#define PRINT(type) puts(ruby_##type)
#define MKSTR(type) rb_obj_freeze(rb_usascii_str_new_static(ruby_##type, sizeof(ruby_##type)-1))
#define MKINT(name) INT2FIX(ruby_##name)

const int ruby_api_version[] = {
    RUBY_API_VERSION_MAJOR,
    RUBY_API_VERSION_MINOR,
    RUBY_API_VERSION_TEENY,
};
#define RUBY_VERSION \
    STRINGIZE(RUBY_VERSION_MAJOR) "." \
    STRINGIZE(RUBY_VERSION_MINOR) "." \
    STRINGIZE(RUBY_VERSION_TEENY) ""
#ifndef RUBY_FULL_REVISION
# define RUBY_FULL_REVISION RUBY_REVISION
#endif
#ifdef YJIT_SUPPORT
#define YJIT_DESCRIPTION " +YJIT " STRINGIZE(YJIT_SUPPORT)
#else
#define YJIT_DESCRIPTION " +YJIT"
#endif
const char ruby_version[] = RUBY_VERSION;
const char ruby_revision[] = RUBY_FULL_REVISION;
const char ruby_release_date[] = RUBY_RELEASE_DATE;
const char ruby_platform[] = RUBY_PLATFORM;
const int ruby_patchlevel = RUBY_PATCHLEVEL;
const char ruby_description[] = RUBY_DESCRIPTION_WITH("");
static const char ruby_description_with_rjit[] = RUBY_DESCRIPTION_WITH(" +RJIT");
static const char ruby_description_with_yjit[] = RUBY_DESCRIPTION_WITH(YJIT_DESCRIPTION);
const char ruby_copyright[] = "ruby - Copyright (C) "
    RUBY_BIRTH_YEAR_STR "-" RUBY_RELEASE_YEAR_STR " "
    RUBY_AUTHOR;
const char ruby_engine[] = "ruby";

// Might change after initialization
const char *rb_dynamic_description = ruby_description;

/*! Defines platform-depended Ruby-level constants */
void
Init_version(void)
{
    enum {ruby_patchlevel = RUBY_PATCHLEVEL};
    VALUE version;
    VALUE ruby_engine_name;
    /*
     * The running version of ruby
     */
    rb_define_global_const("RUBY_VERSION", (version = MKSTR(version)));
    /*
     * The date this ruby was released
     */
    rb_define_global_const("RUBY_RELEASE_DATE", MKSTR(release_date));
    /*
     * The platform for this ruby
     */
    rb_define_global_const("RUBY_PLATFORM", MKSTR(platform));
    /*
     * The patchlevel for this ruby.  If this is a development build of ruby
     * the patchlevel will be -1
     */
    rb_define_global_const("RUBY_PATCHLEVEL", MKINT(patchlevel));
    /*
     * The GIT commit hash for this ruby.
     */
    rb_define_global_const("RUBY_REVISION", MKSTR(revision));
    /*
     * The copyright string for ruby
     */
    rb_define_global_const("RUBY_COPYRIGHT", MKSTR(copyright));
    /*
     * The engine or interpreter this ruby uses.
     */
    rb_define_global_const("RUBY_ENGINE", ruby_engine_name = MKSTR(engine));
    ruby_set_script_name(ruby_engine_name);
    /*
     * The version of the engine or interpreter this ruby uses.
     */
    rb_define_global_const("RUBY_ENGINE_VERSION", (1 ? version : MKSTR(version)));

    rb_provide("ruby2_keywords.rb");
}

#if USE_RJIT
#define RJIT_OPTS_ON opt->rjit.on
#else
#define RJIT_OPTS_ON 0
#endif

#if USE_YJIT
#define YJIT_OPTS_ON opt->yjit
#else
#define YJIT_OPTS_ON 0
#endif

void
Init_ruby_description(ruby_cmdline_options_t *opt)
{
    VALUE description;

    if (RJIT_OPTS_ON) {
        rb_dynamic_description = ruby_description_with_rjit;
        description = MKSTR(description_with_rjit);
    }
    else if (YJIT_OPTS_ON) {
        rb_dynamic_description = ruby_description_with_yjit;
        description = MKSTR(description_with_yjit);
    }
    else {
        description = MKSTR(description);
    }

    /*
     * The full ruby version string, like <tt>ruby -v</tt> prints
     */
    rb_define_global_const("RUBY_DESCRIPTION", /* MKSTR(description) */ description);
}

void
ruby_show_version(void)
{
    puts(rb_dynamic_description);

#ifdef RUBY_LAST_COMMIT_TITLE
    fputs("last_commit=" RUBY_LAST_COMMIT_TITLE, stdout);
#endif
#ifdef HAVE_MALLOC_CONF
    if (malloc_conf) printf("malloc_conf=%s\n", malloc_conf);
#endif
    fflush(stdout);
}

void
ruby_show_copyright(void)
{
    PRINT(copyright);
    fflush(stdout);
}