155 lines
3.9 KiB
C
155 lines
3.9 KiB
C
/* cli.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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*
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* author: Daniel Otte
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* email: daniel.otte@rub.de
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* license: GPLv3 or later
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*
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* components to help implementing simple command based interaction
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*
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**/
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#include <stdlib.h>
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#include <stdint.h>
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#include <ctype.h>
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#include <string.h>
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#include <avr/pgmspace.h>
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#include "string-extras.h"
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#include "cli.h"
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#include "config.h"
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#include "hexdigit_tab.h"
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cli_rx_fpt cli_rx = NULL;
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cli_tx_fpt cli_tx = NULL;
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uint8_t cli_echo = 1;
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void echo_ctrl(char* s);
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uint16_t max_cmd_length(PGM_VOID_P cmdlist);
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int8_t search_and_call(char* cmd, uint16_t maxcmdlength, PGM_VOID_P cmdlist);
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void cli_option_listing(char* buffer, PGM_VOID_P cmdlist);
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void cli_auto_help(uint16_t maxcmdlength, PGM_VOID_P cmdlist);
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typedef void(*str_fpt)(char*);
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#define CLI_ENTER 13
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#define CLI_BACKSPACE 8
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#define CLI_TABULATOR 9
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uint8_t cli_completion(char* buffer, uint16_t maxcmdlength, PGM_VOID_P cmdlist){
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uint8_t i=0;
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char ref[maxcmdlength+1];
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char* itemstr;
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ref[0]='\0';
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/* check if we are behind the first word */
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while(buffer[i]){
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if(!isgraph(buffer[i++]))
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return 0;
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}
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for(;;){
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itemstr = (char*)pgm_read_word(cmdlist);
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if(itemstr==NULL)
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break;
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cmdlist = (uint8_t*)cmdlist +CMDLIST_ENTRY_SIZE;
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if(!strncmp_P(buffer, itemstr, i)){
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if(!ref[0]){
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strcpy_P(ref, itemstr);
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}else{
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ref[stridentcnt_P(ref, itemstr)]='\0';
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}
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}
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}
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i = strcmp(buffer, ref);
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if(i)
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strcpy(buffer, ref);
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return ~i;
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}
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int8_t cmd_interface(PGM_VOID_P cmd_desc){
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uint16_t cli_buffer_size;
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uint16_t cli_buffer_index;
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int8_t exit_code;
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uint8_t completion_failed=0;
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char* cli_buffer;
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char c;
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uint16_t maxcmdlength = max_cmd_length(cmd_desc);
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cli_buffer = calloc(1,cli_buffer_size=maxcmdlength+2);
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cli_buffer_index=0;
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if(!cli_rx)
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return -1;
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if(cli_tx)
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cli_tx('>');
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for(;;){
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c = cli_rx();
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switch (c){
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case CLI_ENTER:
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if((exit_code=search_and_call(cli_buffer, maxcmdlength, cmd_desc))<=0){
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free(cli_buffer);
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return exit_code;
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}
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/* cli_putstr(cli_buffer); */
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memset(cli_buffer, 0, cli_buffer_size);
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cli_buffer_index=0;
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/* cli_putstr_P(PSTR(" DONE\r\n>")); */
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cli_putstr_P(PSTR("\r\n>"));
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completion_failed=0;
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break;
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case CLI_BACKSPACE:
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completion_failed=0;
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if(cli_buffer_index==0)
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break;
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cli_buffer_index--;
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cli_buffer[cli_buffer_index] = '\0';
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if(cli_echo && cli_tx){
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cli_tx(c);
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}
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break;
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case CLI_TABULATOR:
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if(completion_failed || cli_buffer_index==0){
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if(cli_tx)
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cli_option_listing(cli_buffer, cmd_desc);
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} else {
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uint16_t old_idx = cli_buffer_index;
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completion_failed =
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~cli_completion(cli_buffer, maxcmdlength, cmd_desc);
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cli_buffer_index = strlen(cli_buffer);
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if(cli_echo && cli_tx){
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while(old_idx<cli_buffer_index){
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cli_tx(cli_buffer[old_idx++]);
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}
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}
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}
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break;
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default:
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completion_failed=0;
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if(cli_echo && cli_tx){
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cli_tx(c);
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}
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if(cli_buffer_index+1==cli_buffer_size){
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cli_buffer = realloc(cli_buffer, cli_buffer_size+=CLI_BUFFER_BS);
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if(!cli_buffer){
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return -2;
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}
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memset(cli_buffer+cli_buffer_index+1, 0, CLI_BUFFER_BS);
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}
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cli_buffer[cli_buffer_index++] = c;
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}
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}
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}
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