| 0,0 → 1,95 |
|---|
| /* This file is part of the SvarCOM project and is published under the terms |
| * of the MIT license. |
| * |
| * Copyright (C) 2021-2022 Mateusz Viste |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /* |
| * echo |
| */ |
| |
| static enum cmd_result cmd_echo(struct cmd_funcparam *p) { |
| const char *arg = p->cmdline + 5; |
| |
| /* display help only if /? is the only argument */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "/?"))) { |
| nls_outputnl(31,0); /* "Displays messages, or turns command-echoing on or off" */ |
| outputnl(""); |
| outputnl("ECHO [ON | OFF]"); |
| nls_outputnl(31,1); /* "ECHO [message]" */ |
| outputnl(""); |
| nls_outputnl(31,2); /* "Type ECHO without parameters to display the current setting." */ |
| return(CMD_OK); |
| } |
| |
| /* ECHO without any parameter: display current state */ |
| if (p->argc == 0) { |
| if (p->rmod->flags & FLAG_ECHOFLAG) { |
| nls_outputnl(31,3); /* "ECHO is on" */ |
| } else { |
| nls_outputnl(31,4); /* "ECHO is off" */ |
| } |
| return(CMD_OK); |
| } |
| |
| /* ECHO ON */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "on"))) { |
| p->rmod->flags |= FLAG_ECHOFLAG; |
| return(CMD_OK); |
| } |
| |
| /* ECHO OFF */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "off"))) { |
| p->rmod->flags &= ~FLAG_ECHOFLAG; |
| return(CMD_OK); |
| } |
| |
| /* ECHO MSG (start at cmdline+5 since first 5 are "ECHO" + separator) */ |
| _asm { |
| push ax |
| push dx |
| push si |
| |
| mov si, [arg] |
| cld /* clear direction flag (DF) so lodsb increments SI */ |
| mov ah, 0x02 /* display char from DL */ |
| NEXTYBTE: |
| lodsb /* load byte at DS:[SI] into AL and inc SI (if DF clear) */ |
| or al, al /* is AL == 0? then end of string reached */ |
| jz DONE |
| mov dl, al |
| int 0x21 |
| jmp NEXTYBTE |
| |
| /* output a final CR/LF */ |
| DONE: |
| mov dl, 0x0D |
| int 0x21 |
| mov dl, 0x0A |
| int 0x21 |
| |
| pop si |
| pop dx |
| pop ax |
| } |
| |
| return(CMD_OK); |
| } |