| 0,0 → 1,99 |
|---|
| /* This file is part of the SvarCOM project and is published under the terms |
| * of the MIT license. |
| * |
| * Copyright (C) 2021 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. |
| */ |
| |
| /* |
| * if [not] exists |
| * if [not] errorlevel 1 |
| * if [not] string ==string (string==string and string == string works, too) |
| * if [not] errorlevel == 1 <-- I do NOT support this one, even though |
| * MSDOS 5 and 6 considers it equivalent to |
| * IF ERRORLEVEL 1. This is a misleading and |
| * undocumented syntax (does not actually |
| * check for equality). |
| */ |
| |
| |
| #define JMP_NEXT_ARG(s) while ((*s != ' ') && (*s != 0)) s++; while (*s == ' ') s++; |
| |
| |
| static int cmd_if(struct cmd_funcparam *p) { |
| unsigned char negflag = 0; |
| unsigned short i; |
| const char *s = p->cmdline + p->argoffset; |
| |
| /* help screen ONLY if /? is the only argument - I do not want to output |
| * help for ex. for "if %1 == /? echo ..." */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "/?"))) { |
| outputnl("Performs conditional processing in batch programs."); |
| outputnl(""); |
| outputnl("IF [NOT] ERRORLEVEL num command"); |
| outputnl("IF [NOT] string1==string2 command"); |
| outputnl("IF [NOT] EXIST filename command"); |
| outputnl(""); |
| outputnl("NOT command is executed only if condition is NOT met"); |
| outputnl("ERRORLEVEL num condition: last program returned an exit code >= num"); |
| outputnl("string1==string2 condition: both strings must be equal"); |
| outputnl("EXIST filename condition: filename exists"); |
| outputnl("command command to carry out if condition is met."); |
| return(-1); |
| } |
| |
| /* negation? */ |
| if (imatchlim(s, "NOT ", 4)) { |
| negflag = 1; |
| JMP_NEXT_ARG(s); |
| } |
| |
| /* IF ERRORLEVEL x cmd */ |
| if (imatchlim(s, "ERRORLEVEL ", 11)) { |
| unsigned char far *rmod_exitcode = MK_FP(p->rmod->rmodseg, RMOD_OFFSET_LEXITCODE); |
| JMP_NEXT_ARG(s); |
| if (*s == 0) goto SYNTAX_ERR; |
| /* convert errorlevel to an uint */ |
| if ((*s < '0') || (*s > '9')) { |
| i = 0xffff; |
| } else { |
| atous(&i, s); |
| } |
| JMP_NEXT_ARG(s); |
| if (*s == 0) goto SYNTAX_ERR; |
| /* is errorlevel matching? */ |
| if (i <= *rmod_exitcode) negflag ^= 1; |
| if (negflag) { |
| output("EXEC (TO BE IMPLEMENTED): "); |
| outputnl(s); |
| } |
| return(-1); |
| } |
| |
| /* TODO IF EXISTS fname */ |
| /* TODO IF str1==str2 */ |
| |
| SYNTAX_ERR: |
| |
| /* invalid syntax */ |
| outputnl("Syntax error"); |
| |
| return(-1); |
| } |