history.c

[詳解]

/** @file
    @brief      コマンドヒストリ

    @date       2007.03.18
    @author     Takashi SHUDO
*/

#include "history.h"
#include "str.h"

/*
  ヒストリーのクリア
*/
void init_history(struct st_history *his)
{
        int j;

        for(j=0; j<(GSC_SHELL_MAX_COM_HIS+1); j++) {
                (void)memoryset(his->his_buf[j], 0, GSC_SHELL_MAX_LINE_COLUMS+1);
        }
        
        his->pos = 0;
        his->num = 0;
}

/*
  ヒストリーに記録
*/
void save_history(struct st_history *his, uchar *com)
{
        int i;

        if(strleng(com) != 0) {
                (void)strncopy(his->his_buf[0], com, GSC_SHELL_MAX_LINE_COLUMS);
        
                for(i=GSC_SHELL_MAX_COM_HIS; i>0; i--) {
                        (void)strncopy(his->his_buf[i], his->his_buf[i-1],
                                 GSC_SHELL_MAX_LINE_COLUMS);
                }
                if(his->num <= GSC_SHELL_MAX_COM_HIS) {
                        his->num ++;
                }
                his->pos = 0;
        }
}

/*
  次のヒストリーを表示
*/
void foward_history(struct st_history *his, struct st_lineedit *le)
{
        if(his->pos > 0) {
                his->pos --;
                set_str_lineedit(le, his->his_buf[his->pos]);
        }
}

/*
  前のヒストリーを表示
*/
void back_history(struct st_history *his, struct st_lineedit *le)
{
        if((his->pos < GSC_SHELL_MAX_COM_HIS) &&
           (his->pos < his->num)) {
                if(his->pos == 0) {
                        (void)strncopy(his->his_buf[0], le->buf, GSC_SHELL_MAX_LINE_COLUMS);
                }
                
                his->pos ++;

                set_str_lineedit(le, his->his_buf[his->pos]);
        }
}