ruby--ruby/tool/ruby_vm/views/_insn_name_info.erb

%# -*- C -*-
%# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
%#
%# This file is a part of  the programming language Ruby.  Permission is hereby
%# granted, to either  redistribute and/or modify this file,  provided that the
%# conditions mentioned  in the  file COPYING  are met.   Consult the  file for
%# details.
%
% a = RubyVM::Instructions.map {|i| i.name }
% b = (0...a.size)
% c = a.inject([0]) {|r, i| r << (r[-1] + i.length + 1) }
% c.pop
%
CONSTFUNC(MAYBE_UNUSED(static const char *insn_name(VALUE insn)));

RUBY_SYMBOL_EXPORT_BEGIN /* for debuggers */
extern const int rb_vm_max_insn_name_size;
extern const char rb_vm_insn_name_base[];
extern const unsigned short rb_vm_insn_name_offset[VM_INSTRUCTION_SIZE];
RUBY_SYMBOL_EXPORT_END

#ifdef RUBY_VM_INSNS_INFO
const int rb_vm_max_insn_name_size = <%= a.map(&:size).max %>;

const char rb_vm_insn_name_base[] =
% a.each do |i|
    <%=cstr i%> "\0"
% end
    ;

const unsigned short rb_vm_insn_name_offset[] = {
% c.each_slice 12 do |d|
    <%= d.map {|i| sprintf("%4d", i) }.join(', ') %>,
% end
};

ASSERT_VM_INSTRUCTION_SIZE(rb_vm_insn_name_offset);
#endif

const char *
insn_name(VALUE i)
{
    return &rb_vm_insn_name_base[rb_vm_insn_name_offset[i]];
}