define brainfuck keymap (#4742)

* define brainfuck keymap

* Update keyboards/namecard2x4/keymaps/brainfuck/readme.md

Co-Authored-By: takashiski <takashiskibb@gmail.com>

diff --git a/keyboards/namecard2x4/keymaps/brainfuck/config.h b/keyboards/namecard2x4/keymaps/brainfuck/config.h
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+++ b/keyboards/namecard2x4/keymaps/brainfuck/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2018 takashiski
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here

diff --git a/keyboards/namecard2x4/keymaps/brainfuck/keymap.c b/keyboards/namecard2x4/keymaps/brainfuck/keymap.c
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+++ b/keyboards/namecard2x4/keymaps/brainfuck/keymap.c
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+/* Copyright 2018 takashiski
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+#include "keymap_jp.h"
+
+enum Layer
+{
+       JP,
+       EN,
+       CONFIG
+};
+
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[JP] = LAYOUT(
+               JP_LT,JP_GT,JP_PLUS,JP_MINS,\
+               LT(CONFIG,JP_DOT),JP_COMM,JP_LBRC,LT(CONFIG,JP_RBRC)\
+               ),
+[EN] = LAYOUT(
+               KC_LT,KC_GT,KC_PLUS,KC_MINS,\
+               LT(CONFIG,KC_DOT),KC_COMM,KC_LBRC,LT(CONFIG,KC_RBRC)\
+               ),
+[CONFIG]= LAYOUT(
+               KC_NO,DF(JP),DF(JP),KC_NO,\
+               KC_TRNS,DF(EN),DF(JP),KC_TRNS\
+               )
+
+};
+
+
+void matrix_init_user(void) {
+
+}
+
+void matrix_scan_user(void) {
+
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}

diff --git a/keyboards/namecard2x4/keymaps/brainfuck/readme.md b/keyboards/namecard2x4/keymaps/brainfuck/readme.md
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+++ b/keyboards/namecard2x4/keymaps/brainfuck/readme.md
@@ -0,0 +1,12 @@
+# keymap for brainfuck
+
+ This keymap is specialized for the brainfuck programming language.
+
+| < | > | + | - |
+| . | , | [ | ] |
+
+and when you hold . or ], change config layer.
+
+default layer is for JP keyboard(logical pairing).
+you can choose EN keyboard(typewrite pairing).
+