| 0,0 → 1,155 |
|---|
| /* 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. |
| */ |
| |
| /* |
| * FOR %variable IN (set) DO command [command-parameters] |
| * |
| * %variable a replaceable parameter name |
| * (set) a set of one of more files. Wildcards allowed. |
| * command the command to carry out for each matched file |
| * command-parameters parameters or switches for the specified command |
| * |
| * To use FOR in a batch program, use %%variable instead of %variable |
| * |
| * the set of files must be surrounded by parenthesis, and may contain one |
| * or more space-delimited wildcards. Examples: |
| * (file.txt other.txt) |
| * (*.exe *.com *.bat) |
| * (jan*.txt 199201??.txt) |
| */ |
| |
| /* Implementation notes: |
| * |
| * For cannot be nested (no "FOR ... do FOR ..." allowed) |
| * |
| * When executed, FOR allocates a "FOR context" to RMOD's memory, this context |
| * holds the memory state of a FindNext iteration, as well as the command |
| * to run on each matched file. |
| * |
| * This FOR context is looked at by command.c and used to provide a command |
| * instead of getting the command from interactive cli or BAT file. Repeats |
| * until the FindNext buffer stops matching files. |
| * |
| * This file only provides the help screen of FOR, as well as the FOR-context |
| * initialization. Actual execution happens within command.c. |
| */ |
| |
| |
| /* normalizing for-loop pattern-list separators. |
| * returns a space char if c is a for-pattern separator, c otherwise */ |
| static char cmd_for_sepnorm(char c) { |
| /* the list of valid delimiters has been researched and kindly shared by Robert |
| * Riebisch via the ticket at https://osdn.net/projects/svardos/ticket/44058 */ |
| switch (c) { |
| case ' ': |
| case '\t': |
| case ';': |
| case ',': |
| case '/': |
| case '=': |
| return(' '); /* normalize FOR-loop separators to a space */ |
| default: /* anything else is kept as-is */ |
| return(c); |
| } |
| } |
| |
| |
| static enum cmd_result cmd_for(struct cmd_funcparam *p) { |
| struct forctx *f = (void *)(p->BUFFER); |
| unsigned short i; |
| |
| /* forbid nested FORs */ |
| if (p->rmod->forloop) { |
| nls_outputnl(18,7); /* "FOR cannot be nested" */ |
| return(CMD_FAIL); |
| } |
| |
| /* help screen ONLY if /? is the only argument */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "/?"))) { |
| nls_outputnl(18,0); /* "Runs a specified command for each element in a list." */ |
| outputnl(""); |
| nls_outputnl(18,1); /* "FOR %variable IN (list) DO command [parameters]" */ |
| outputnl(""); |
| nls_outputnl(18,2); /* "%variable Single-letter variable (a-z or A-Z)." */ |
| nls_outputnl(18,3); /* "(list) One or more space-separated strings or filename wildcards." */ |
| nls_outputnl(18,4); /* "command The command to carry out for each element. %variable allowed." */ |
| nls_outputnl(18,5); /* "parameters Parameters or switches for the specified command." */ |
| outputnl(""); |
| nls_outputnl(18,6); /* "To use FOR in a batch program, use %%variable instead of %variable" */ |
| return(CMD_OK); |
| } |
| |
| /* clear out struct and copy command line to it */ |
| bzero(f, sizeof(*f)); |
| strcpy(f->cmd, p->cmdline); |
| |
| /* locate the %varname (single char) */ |
| i = p->argoffset; |
| while (f->cmd[i] == ' ') i++; |
| if ((f->cmd[i] != '%') || (f->cmd[i+1] == ' ') || (f->cmd[i+2] != ' ')) goto INVALID_SYNTAX; |
| f->varname = f->cmd[i+1]; |
| i += 3; |
| |
| /* look (and skip) the "IN" part */ |
| while (f->cmd[i] == ' ') i++; |
| if (((f->cmd[i] & 0xDF) != 'I') && ((f->cmd[i+1] & 0xDF) != 'N') && (f->cmd[i+2] != ' ')) goto INVALID_SYNTAX; |
| i += 3; |
| |
| /* look for patterns start */ |
| while (f->cmd[i] == ' ') i++; |
| if (f->cmd[i] != '(') goto INVALID_SYNTAX; |
| i++; |
| while (cmd_for_sepnorm(f->cmd[i]) == ' ') i++; |
| f->nextpat = i; |
| /* look for patterns end and normalize all separators to a space */ |
| while ((f->cmd[i] != ')') && (f->cmd[i] != 0)) { |
| f->cmd[i] = cmd_for_sepnorm(f->cmd[i]); |
| i++; |
| } |
| if (f->cmd[i] != ')') goto INVALID_SYNTAX; |
| f->cmd[i++] = 0; /* terminate patterns and move to next field */ |
| |
| /* look (and skip) the "DO" part */ |
| while (f->cmd[i] == ' ') i++; |
| if (((f->cmd[i] & 0xDF) != 'D') && ((f->cmd[i+1] & 0xDF) != 'O') && (f->cmd[i+2] != ' ')) goto INVALID_SYNTAX; |
| i += 3; |
| while (f->cmd[i] == ' ') i++; |
| |
| /* rest is the exec string */ |
| f->exec = i; |
| |
| /* alloc memory for the forctx context and copy f to it */ |
| p->rmod->forloop = rmod_fcalloc(sizeof(*f), p->rmod->rmodseg, "SVFORCTX"); |
| if (p->rmod->forloop == NULL) { |
| nls_outputnl_doserr(8); |
| return(CMD_FAIL); |
| } |
| _fmemcpy(p->rmod->forloop, f, sizeof(*f)); |
| |
| return(CMD_OK); |
| |
| INVALID_SYNTAX: |
| nls_outputnl(0,1); /* "Invalid syntax" */ |
| return(CMD_FAIL); |
| } |