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/*
casm - Simple, portable assembler
Copyright (C) 2003-2015 Ian Cowburn (ianc@noddybox.demon.co.uk)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------
Tokeniser and parser.
*/
#ifndef CASM_PARSE_H
#define CASM_PARSE_H
/* ---------------------------------------- TYPES
*/
/* Represents a tokenised line.
no_tokens is the number of tokens that can be accessed via token[i].
If quoted[i] is non-zero it contains the opening character that was used to
quote argument [i]. Note that '(' counts as a quote in command arguments.
If first_column is true then the first column held a parsable character.
*/
typedef struct Line
{
int no_tokens;
int first_column;
int *quoted;
char **token;
char *comment;
} Line;
/* Used to represent a table of string/value pairs. The table is ended with
a NULL in str.
*/
typedef struct ValueTable
{
const char *str;
int value;
} ValueTable;
/* ---------------------------------------- MACROS
*/
/* Defines the set of values allowed for boolean strings and generates table
entries using the passed 'tv' and 'fv' for true and false respictively.
*/
#define YES_NO_ENTRIES(tv, fv) \
{"on", tv}, \
{"true", tv}, \
{"yes", tv}, \
{"off", fv}, \
{"false", fv}, \
{"no", fv}
/* ---------------------------------------- INTERFACES
*/
/* Parses a line. Returns TRUE if line parsed OK, otherwise returns FALSE.
ParseError() will return the reason for any failures.
Remember that it may be possible to get a line with no tokens.
*/
int ParseLine(Line *line, const char *source);
/* Free up the dynamic parts of a tokenised line
*/
void ParseFree(Line *line);
/* Returns a reason for the last failure.
*/
const char *ParseError(void);
/* Return a value from a table. The check is done case insensitive. Returns
the value item, or NULL if not found.
*/
const ValueTable *ParseTable(const char *str, const ValueTable *table);
/* Parse a true/false value from a built-in table. Returns def if the value is
invalid.
The mappings generated from YES_NO_ENTRIES(TRUE, FALSE) are used.
};
*/
int ParseTrueFalse(const char *str, int def);
/* Returns true if the passed text is in the passed NULL terminated array of
names.
*/
int ParseInTable(const char *str, const char *names[]);
#endif
/*
vim: ai sw=4 ts=8 expandtab
*/
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