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48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
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/*
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* kicad/sexpr.h - S-expression parser
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*
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* Written 2016 by Werner Almesberger
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* Copyright 2016 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef KICAD_SEXPR_H
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#define KICAD_SEXPR_H
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#include <stdbool.h>
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/*
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* Expression type:
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*
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* s e Meaning
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* ------------ -------- ----------
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* NULL NULL "" or ()
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* non-NULL NULL foo or "foo"
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* NULL non-NULL (...)
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* non-NULL non-NULL trouble
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*/
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struct expr {
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char *s; /* string or NULL */
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struct expr *e; /* sub-sexpr or NULL*/
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struct expr *next;
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};
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struct sexpr_ctx;
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void dump_expr(const struct expr *e);
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void free_expr(struct expr *e);
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struct sexpr_ctx *sexpr_new(void);
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bool sexpr_parse(struct sexpr_ctx *ctx, const char *s);
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bool sexpr_finish(struct sexpr_ctx *ctx, struct expr **res);
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#endif /* !KICAD_SEXPR_H */
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