Shinichiro Nakamura / NaturalTinyShell

Natural Tiny Shell (NT-Shell) library is a tiny shell library for a small embedded system. The interface is really simple. You should only know ntshell_execute in ntshell.h. So you can port it to any embedded system easily. Please enjoy your small embedded system with it. :)

Dependents:   NaturalTinyShell_TestProgram

text_editor.c@0:7147d6024de8, 2011-05-22 (annotated)

Committer:
shintamainjp
Date:
Sun May 22 02:51:35 2011 +0000
Revision:
0:7147d6024de8
Initial version.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shintamainjp 0:7147d6024de8 1 /**
shintamainjp 0:7147d6024de8 2 * @file text_editor.c
shintamainjp 0:7147d6024de8 3 * @author Shinichiro Nakamura
shintamainjp 0:7147d6024de8 4 * @brief NT-Shell用テキストエディタモジュールの実装。
shintamainjp 0:7147d6024de8 5 * @details
shintamainjp 0:7147d6024de8 6 * 文字列の編集を論理的に扱うためのモジュール。
shintamainjp 0:7147d6024de8 7 * このモジュールはビューに関して一切感知しない。
shintamainjp 0:7147d6024de8 8 */
shintamainjp 0:7147d6024de8 9
shintamainjp 0:7147d6024de8 10 /*
shintamainjp 0:7147d6024de8 11 * ===============================================================
shintamainjp 0:7147d6024de8 12 * Natural Tiny Shell (NT-Shell)
shintamainjp 0:7147d6024de8 13 * Version 0.0.6
shintamainjp 0:7147d6024de8 14 * ===============================================================
shintamainjp 0:7147d6024de8 15 * Copyright (c) 2010-2011 Shinichiro Nakamura
shintamainjp 0:7147d6024de8 16 *
shintamainjp 0:7147d6024de8 17 * Permission is hereby granted, free of charge, to any person
shintamainjp 0:7147d6024de8 18 * obtaining a copy of this software and associated documentation
shintamainjp 0:7147d6024de8 19 * files (the "Software"), to deal in the Software without
shintamainjp 0:7147d6024de8 20 * restriction, including without limitation the rights to use,
shintamainjp 0:7147d6024de8 21 * copy, modify, merge, publish, distribute, sublicense, and/or
shintamainjp 0:7147d6024de8 22 * sell copies of the Software, and to permit persons to whom the
shintamainjp 0:7147d6024de8 23 * Software is furnished to do so, subject to the following
shintamainjp 0:7147d6024de8 24 * conditions:
shintamainjp 0:7147d6024de8 25 *
shintamainjp 0:7147d6024de8 26 * The above copyright notice and this permission notice shall be
shintamainjp 0:7147d6024de8 27 * included in all copies or substantial portions of the Software.
shintamainjp 0:7147d6024de8 28 *
shintamainjp 0:7147d6024de8 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
shintamainjp 0:7147d6024de8 30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
shintamainjp 0:7147d6024de8 31 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
shintamainjp 0:7147d6024de8 32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
shintamainjp 0:7147d6024de8 33 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
shintamainjp 0:7147d6024de8 34 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
shintamainjp 0:7147d6024de8 35 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
shintamainjp 0:7147d6024de8 36 * OTHER DEALINGS IN THE SOFTWARE.
shintamainjp 0:7147d6024de8 37 * ===============================================================
shintamainjp 0:7147d6024de8 38 */
shintamainjp 0:7147d6024de8 39
shintamainjp 0:7147d6024de8 40 #include "text_editor.h"
shintamainjp 0:7147d6024de8 41
shintamainjp 0:7147d6024de8 42 /**
shintamainjp 0:7147d6024de8 43 * @brief テキストエディタを初期化する。
shintamainjp 0:7147d6024de8 44 *
shintamainjp 0:7147d6024de8 45 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 46 */
shintamainjp 0:7147d6024de8 47 void text_editor_init(text_editor_t *p)
shintamainjp 0:7147d6024de8 48 {
shintamainjp 0:7147d6024de8 49 p->pos = 0;
shintamainjp 0:7147d6024de8 50 p->len = 0;
shintamainjp 0:7147d6024de8 51 p->buffer[p->len] = '\0';
shintamainjp 0:7147d6024de8 52 }
shintamainjp 0:7147d6024de8 53
shintamainjp 0:7147d6024de8 54 /**
shintamainjp 0:7147d6024de8 55 * @brief 文字を挿入する。
shintamainjp 0:7147d6024de8 56 *
shintamainjp 0:7147d6024de8 57 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 58 * @param c 文字。
shintamainjp 0:7147d6024de8 59 */
shintamainjp 0:7147d6024de8 60 int text_editor_insert(text_editor_t *p, char c)
shintamainjp 0:7147d6024de8 61 {
shintamainjp 0:7147d6024de8 62 if (p->len < sizeof(p->buffer) - 1) {
shintamainjp 0:7147d6024de8 63 int n = p->len - p->pos + 1;
shintamainjp 0:7147d6024de8 64 int i;
shintamainjp 0:7147d6024de8 65 char *src = p->buffer + p->len + 0;
shintamainjp 0:7147d6024de8 66 char *des = p->buffer + p->len + 1;
shintamainjp 0:7147d6024de8 67 for (i = 0; i < n; i++) {
shintamainjp 0:7147d6024de8 68 *des = *src;
shintamainjp 0:7147d6024de8 69 des--;
shintamainjp 0:7147d6024de8 70 src--;
shintamainjp 0:7147d6024de8 71 }
shintamainjp 0:7147d6024de8 72
shintamainjp 0:7147d6024de8 73 p->buffer[p->pos] = c;
shintamainjp 0:7147d6024de8 74 p->pos++;
shintamainjp 0:7147d6024de8 75 p->len++;
shintamainjp 0:7147d6024de8 76 p->buffer[p->len] = '\0';
shintamainjp 0:7147d6024de8 77 return 1;
shintamainjp 0:7147d6024de8 78 }
shintamainjp 0:7147d6024de8 79 return 0;
shintamainjp 0:7147d6024de8 80 }
shintamainjp 0:7147d6024de8 81
shintamainjp 0:7147d6024de8 82 /**
shintamainjp 0:7147d6024de8 83 * @brief 文字を削除する。
shintamainjp 0:7147d6024de8 84 *
shintamainjp 0:7147d6024de8 85 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 86 */
shintamainjp 0:7147d6024de8 87 int text_editor_backspace(text_editor_t *p)
shintamainjp 0:7147d6024de8 88 {
shintamainjp 0:7147d6024de8 89 if (0 < p->pos) {
shintamainjp 0:7147d6024de8 90 int n = p->len - p->pos;
shintamainjp 0:7147d6024de8 91 int i;
shintamainjp 0:7147d6024de8 92 char *src = p->buffer + p->pos - 0;
shintamainjp 0:7147d6024de8 93 char *des = p->buffer + p->pos - 1;
shintamainjp 0:7147d6024de8 94 p->pos--;
shintamainjp 0:7147d6024de8 95 p->len--;
shintamainjp 0:7147d6024de8 96 for (i = 0; i < n; i++) {
shintamainjp 0:7147d6024de8 97 *des = *src;
shintamainjp 0:7147d6024de8 98 des++;
shintamainjp 0:7147d6024de8 99 src++;
shintamainjp 0:7147d6024de8 100 }
shintamainjp 0:7147d6024de8 101 *(p->buffer + p->len) = '\0';
shintamainjp 0:7147d6024de8 102 return 1;
shintamainjp 0:7147d6024de8 103 }
shintamainjp 0:7147d6024de8 104 return 0;
shintamainjp 0:7147d6024de8 105 }
shintamainjp 0:7147d6024de8 106
shintamainjp 0:7147d6024de8 107 /**
shintamainjp 0:7147d6024de8 108 * @brief カーソル位置を取得する。
shintamainjp 0:7147d6024de8 109 *
shintamainjp 0:7147d6024de8 110 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 111 */
shintamainjp 0:7147d6024de8 112 int text_editor_cursor_get_position(text_editor_t *p)
shintamainjp 0:7147d6024de8 113 {
shintamainjp 0:7147d6024de8 114 return p->pos;
shintamainjp 0:7147d6024de8 115 }
shintamainjp 0:7147d6024de8 116
shintamainjp 0:7147d6024de8 117 /**
shintamainjp 0:7147d6024de8 118 * @brief カーソルを先頭に移動させる。
shintamainjp 0:7147d6024de8 119 *
shintamainjp 0:7147d6024de8 120 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 121 */
shintamainjp 0:7147d6024de8 122 int text_editor_cursor_head(text_editor_t *p)
shintamainjp 0:7147d6024de8 123 {
shintamainjp 0:7147d6024de8 124 if (0 < p->pos) {
shintamainjp 0:7147d6024de8 125 p->pos = 0;
shintamainjp 0:7147d6024de8 126 return 1;
shintamainjp 0:7147d6024de8 127 }
shintamainjp 0:7147d6024de8 128 return 0;
shintamainjp 0:7147d6024de8 129 }
shintamainjp 0:7147d6024de8 130
shintamainjp 0:7147d6024de8 131 /**
shintamainjp 0:7147d6024de8 132 * @brief カーソルを最後尾に移動させる。
shintamainjp 0:7147d6024de8 133 *
shintamainjp 0:7147d6024de8 134 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 135 */
shintamainjp 0:7147d6024de8 136 int text_editor_cursor_tail(text_editor_t *p)
shintamainjp 0:7147d6024de8 137 {
shintamainjp 0:7147d6024de8 138 if (p->pos < p->len) {
shintamainjp 0:7147d6024de8 139 p->pos = p->len;
shintamainjp 0:7147d6024de8 140 return 1;
shintamainjp 0:7147d6024de8 141 }
shintamainjp 0:7147d6024de8 142 return 0;
shintamainjp 0:7147d6024de8 143 }
shintamainjp 0:7147d6024de8 144
shintamainjp 0:7147d6024de8 145 /**
shintamainjp 0:7147d6024de8 146 * @brief カーソルを左へ移動させる。
shintamainjp 0:7147d6024de8 147 *
shintamainjp 0:7147d6024de8 148 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 149 */
shintamainjp 0:7147d6024de8 150 int text_editor_cursor_left(text_editor_t *p)
shintamainjp 0:7147d6024de8 151 {
shintamainjp 0:7147d6024de8 152 if (0 < p->pos) {
shintamainjp 0:7147d6024de8 153 p->pos--;
shintamainjp 0:7147d6024de8 154 return 1;
shintamainjp 0:7147d6024de8 155 }
shintamainjp 0:7147d6024de8 156 return 0;
shintamainjp 0:7147d6024de8 157 }
shintamainjp 0:7147d6024de8 158
shintamainjp 0:7147d6024de8 159 /**
shintamainjp 0:7147d6024de8 160 * @brief カーソルを右へ移動させる。
shintamainjp 0:7147d6024de8 161 *
shintamainjp 0:7147d6024de8 162 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 163 */
shintamainjp 0:7147d6024de8 164 int text_editor_cursor_right(text_editor_t *p)
shintamainjp 0:7147d6024de8 165 {
shintamainjp 0:7147d6024de8 166 if (p->pos < p->len) {
shintamainjp 0:7147d6024de8 167 p->pos++;
shintamainjp 0:7147d6024de8 168 return 1;
shintamainjp 0:7147d6024de8 169 }
shintamainjp 0:7147d6024de8 170 return 0;
shintamainjp 0:7147d6024de8 171 }
shintamainjp 0:7147d6024de8 172
shintamainjp 0:7147d6024de8 173 /**
shintamainjp 0:7147d6024de8 174 * @brief 文字列を設定する。
shintamainjp 0:7147d6024de8 175 *
shintamainjp 0:7147d6024de8 176 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 177 * @param buf 文字列が格納されたバッファ。
shintamainjp 0:7147d6024de8 178 */
shintamainjp 0:7147d6024de8 179 int text_editor_set_text(text_editor_t *p, char *buf)
shintamainjp 0:7147d6024de8 180 {
shintamainjp 0:7147d6024de8 181 char *src = buf;
shintamainjp 0:7147d6024de8 182 char *des = p->buffer;
shintamainjp 0:7147d6024de8 183 int n = 0;
shintamainjp 0:7147d6024de8 184 while (*src) {
shintamainjp 0:7147d6024de8 185 *des = *src;
shintamainjp 0:7147d6024de8 186 des++;
shintamainjp 0:7147d6024de8 187 src++;
shintamainjp 0:7147d6024de8 188 n++;
shintamainjp 0:7147d6024de8 189 if (sizeof(p->buffer) <= n - 1) {
shintamainjp 0:7147d6024de8 190 break;
shintamainjp 0:7147d6024de8 191 }
shintamainjp 0:7147d6024de8 192 }
shintamainjp 0:7147d6024de8 193 *des = '\0';
shintamainjp 0:7147d6024de8 194 p->len = n;
shintamainjp 0:7147d6024de8 195 p->pos = p->len;
shintamainjp 0:7147d6024de8 196 return n;
shintamainjp 0:7147d6024de8 197 }
shintamainjp 0:7147d6024de8 198
shintamainjp 0:7147d6024de8 199 /**
shintamainjp 0:7147d6024de8 200 * @brief 文字列を取得する。
shintamainjp 0:7147d6024de8 201 *
shintamainjp 0:7147d6024de8 202 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 203 * @param buf 文字列を格納するバッファ。
shintamainjp 0:7147d6024de8 204 * @param siz バッファサイズ。
shintamainjp 0:7147d6024de8 205 */
shintamainjp 0:7147d6024de8 206 int text_editor_get_text(text_editor_t *p, char *buf, int siz)
shintamainjp 0:7147d6024de8 207 {
shintamainjp 0:7147d6024de8 208 char *src = p->buffer;
shintamainjp 0:7147d6024de8 209 char *des = buf;
shintamainjp 0:7147d6024de8 210 int n = 0;
shintamainjp 0:7147d6024de8 211 while (*src) {
shintamainjp 0:7147d6024de8 212 *des++ = *src++;
shintamainjp 0:7147d6024de8 213 n++;
shintamainjp 0:7147d6024de8 214 if (siz <= n) {
shintamainjp 0:7147d6024de8 215 break;
shintamainjp 0:7147d6024de8 216 }
shintamainjp 0:7147d6024de8 217 }
shintamainjp 0:7147d6024de8 218 *des = '\0';
shintamainjp 0:7147d6024de8 219 return n;
shintamainjp 0:7147d6024de8 220 }
shintamainjp 0:7147d6024de8 221
shintamainjp 0:7147d6024de8 222 /**
shintamainjp 0:7147d6024de8 223 * @brief 文字列を消去する。
shintamainjp 0:7147d6024de8 224 *
shintamainjp 0:7147d6024de8 225 * @param p テキストエディタ構造体。
shintamainjp 0:7147d6024de8 226 */
shintamainjp 0:7147d6024de8 227 void text_editor_clear(text_editor_t *p)
shintamainjp 0:7147d6024de8 228 {
shintamainjp 0:7147d6024de8 229 p->pos = 0;
shintamainjp 0:7147d6024de8 230 p->len = 0;
shintamainjp 0:7147d6024de8 231 p->buffer[p->len] = '\0';
shintamainjp 0:7147d6024de8 232 }
shintamainjp 0:7147d6024de8 233