+int8_t cmd_interface(PGM_VOID_P cmd_desc){
+ uint16_t cli_buffer_size;
+ uint16_t cli_buffer_index;
+ int8_t exit_code;
+ uint8_t completion_failed=0;
+ char* cli_buffer;
+ char c;
+ uint16_t maxcmdlength = max_cmd_length(cmd_desc);
+ cli_buffer = calloc(1,cli_buffer_size=maxcmdlength+2);
+ cli_buffer_index=0;
+ if(!cli_rx)
+ return -1;
+ if(cli_tx)
+ cli_tx('>');
+ for(;;){
+ c = cli_rx();
+ switch (c){
+ case CLI_ENTER:
+ if((exit_code=search_and_call(cli_buffer, maxcmdlength, cmd_desc))<=0){
+ free(cli_buffer);
+ return exit_code;
+ }
+ memset(cli_buffer, 0, cli_buffer_size);
+ cli_buffer_index=0;
+ cli_putstr_P(PSTR("\r\n>"));
+ completion_failed=0;
+ break;
+ case CLI_BACKSPACE:
+ completion_failed=0;
+ if(cli_buffer_index==0)
+ break;
+ cli_buffer_index--;
+ cli_buffer[cli_buffer_index] = '\0';
+ if(cli_echo && cli_tx){
+ cli_tx(c);
+ }
+ break;
+ case CLI_TABULATOR:
+ if(completion_failed || cli_buffer_index==0){
+ if(cli_tx)
+ cli_option_listing(cli_buffer, cmd_desc);
+ } else {
+ uint16_t old_idx = cli_buffer_index;
+ completion_failed =
+ ~cli_completion(cli_buffer, maxcmdlength, cmd_desc);
+ cli_buffer_index = strlen(cli_buffer);
+ if(cli_echo && cli_tx){
+ while(old_idx<cli_buffer_index){
+ cli_tx(cli_buffer[old_idx++]);
+ }
+ }
+ }
+ break;
+ default:
+ completion_failed=0;
+ if(cli_echo && cli_tx){
+ cli_tx(c);
+ }
+ if(cli_buffer_index+1==cli_buffer_size){
+ cli_buffer = realloc(cli_buffer, cli_buffer_size+=CLI_BUFFER_BS);
+ if(!cli_buffer){
+ return -2;
+ }
+ memset(cli_buffer+cli_buffer_index+1, 0, CLI_BUFFER_BS);
+ }
+ cli_buffer[cli_buffer_index++] = c;
+ }
+ }
+}