boxes/src/parsecode.h

/*
 * boxes - Command line filter to draw/remove ASCII boxes around text
 * Copyright (c) 1999-2021 Thomas Jensen and the boxes contributors
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2, as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 */

/*
 * C code used exclusively by the parser. Include this only in parser.y.
 */

#ifndef PARSECODE_H
#define PARSECODE_H 1

#include "parser.h"


/* return codes of the action_xxx() functions */
#define RC_SUCCESS 0
#define RC_ERROR 1
#define RC_ABORT 2
#define RC_ACCEPT 3

/** the current design being parsed */
#define curdes (bison_args->designs[bison_args->design_idx])



/**
 * Initialize parser data structures.
 * @param bison_args the parser state
 * @return 0: success;
 *         2: YYABORT must be invoked
 */
int action_init_parser(pass_to_bison *bison_args);


int action_chg_delim(pass_to_bison *bison_args, char *delim_expr);


/**
 * Rule action called when a shape list was fully parsed.
 * @param bison_args the parser state
 * @return 0: success;
 *         1: YYERROR must be invoked;
 *         2: YYABORT must be invoked
 */
int action_finalize_shapes(pass_to_bison *bison_args);


/**
 * Rule action called when a new box design is starting to be parsed.
 * @param bison_args the parser state
 * @param design_name the primary name of the design
 * @return 0: success;
 *         1: YYERROR must be invoked;
 *         2: YYABORT must be invoked
 */
int action_start_parsing_design(pass_to_bison *bison_args, char *design_name);


/**
 * Rule action called when a parent config file specification is encountered.
 * @param bison_args the parser state
 * @param filepath the path to the parent config file
 * @return 0: success;
 *         1: YYERROR must be invoked
 */
int action_parent_config(pass_to_bison *bison_args, char *filepath);


/**
 * Rule action called when a design has been parsed completely and can be checked and added.
 * @param bison_args the parser state
 * @param design_primary_name the primary name of the design as specified at BOX statement
 * @param name_at_end the primary name of the design as specified at END statement
 * @return 0: success;
 *         1: YYERROR must be invoked
 *         2: YYABORT must be invoked
 *         3: YYACCEPT must be invoked
 */
int action_add_design(pass_to_bison *bison_args, char *design_primary_name, char *name_at_end);

/**
 * Rule action called when a keyword entry is encountered in a box design.
 * @param bison_args the parser state
 * @param keyword the keyword
 * @param value the associated value
 * @return 0: success;
 *         1: YYERROR must be invoked
 *         2: YYABORT must be invoked
 */
int action_record_keyword(pass_to_bison *bison_args, char *keyword, char *value);


/**
 * Rule action called when an area spec within a padding definition is parsed.
 * @param bison_args the parser state
 * @param area the padding area specified
 * @param value the associated padding value
 * @return currently always 0 (success), but could return any `RC_*`
 */
int action_padding_entry(pass_to_bison *bison_args, char *area, int value);


/**
 * Rule action called to add an alias name to the current design definition.
 * @param bison_args the parser state
 * @param alias_name the alias name
 * @return 0: success;
 *         1: YYERROR must be invoked
 */
int action_add_alias(pass_to_bison *bison_args, char *alias_name);


/**
 * (shape-elastic check)
 */
int perform_se_check(pass_to_bison *bison_args);


/**
 * Reset parser to neutral state, so a new design can be parsed.
 * @param bison_args the parser state
 */
void recover(pass_to_bison *bison_args);


/**
 * Add tag to list of current design's tag after validity checking.
 * @param bison_args the parser state
 * @param tag a single tag, or a comma-separated list of tags
 * @return error code, 0 on success, anything else on failure
 */
int tag_record(pass_to_bison *bison_args, char *tag);


/**
 * Add the sample block to the current design.
 * @param bison_args the parser state
 * @param sample the sample block content (non-empty when this is invoked)
 * @return 0: success;
 *         1: YYERROR must be invoked
 *         2: YYABORT must be invoked
 */
int action_sample_block(pass_to_bison *bison_args, char *sample);


#endif

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