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962 mateusz.vi 1
/* This file is part of the SvarCOM project and is published under the terms
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 * of the MIT license.
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 *
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 * Copyright (C) 2021 Mateusz Viste
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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 * DEALINGS IN THE SOFTWARE.
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 */
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/*
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 * goto label
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 *
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 * if label does not exist in the currently processed batch file, then a error
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 * "Label not found" is displayed and the batch file is aborted. Any parent
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 * batches are ALSO aborted. Same behavior if called without any parameter.
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 *
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 * if called outside of a batch file, this command has no effect (and does not
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 * display any error, even when called without any argument).
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 *
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 * it reacts to /? by outputing its help screen
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 *
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 * only 1st argument is processed, any extra arguments are ignored (even /?).
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 *
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 * Labels can be written as:
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 * :LABEL
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 *    :LABEL
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 *   :  LABEL
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 *
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 * Labels are searched in the batch file from top to bottom and first match
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 * is jumped to.
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 */
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static enum cmd_result cmd_goto(struct cmd_funcparam *p) {
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  /* help? reacts only to /? being passed as FIRST argument */
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  if ((p->argc > 0) && imatch(p->argv[0], "/?")) {
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    outputnl("Directs batch processing to a labelled line in the batch program.");
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    outputnl("");
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    outputnl("GOTO LABEL");
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    outputnl("");
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    outputnl("LABEL specifies a text string used in the batch program as a label.");
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    outputnl("");
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    outputnl("A label is on a line by itself and must be preceded by a colon.");
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    return(CMD_OK);
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  }
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  /* not inside a batch file? then do nothing */
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  if (p->rmod->bat == NULL) return(CMD_OK);
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  /* TODO open batch file and read it line by line until label is found or EOF */
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  /* TODO if label not found, display error message and abort all batch scripts */
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  return(CMD_OK);
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}