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eda-tools/b2/subst.h

96 lines
2.0 KiB
C

/*
* subst.h - Substitution rules
*
* Copyright 2012 by Werner Almesberger
*
* 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 2 of the License, or
* (at your option) any later version.
*/
#ifndef SUBST_H
#define SUBST_H
#include <stdio.h>
#include <sys/types.h>
#include <regex.h>
#include "relop.h"
#define NMATCH 10 /* $0 (not used), $1...$9 */
enum chunk_type {
ct_string,
ct_var,
ct_sub,
};
struct chunk {
enum chunk_type type;
union {
const char *s;
const char *var;
int sub; /* 0 if $$ */
} u;
struct chunk *next;
};
enum subst_type {
st_match, /* try to match a variable */
st_assign, /* assign to a variable */
st_end, /* end the substitutions, accepting the part */
st_ignore, /* ignore the part */
st_break, /* jump to an outer block */
st_continue, /* repeat an outer block */
st_print, /* print a variable, for debugging */
};
struct subst {
enum subst_type type;
union {
struct {
const char *src;
regex_t re;
struct subst *block;
char units[NMATCH-1];
} match;
struct {
const char *dst;
enum relop op;
struct chunk *pat;
} assign;
const char *print;
const struct subst *jump;
const char *tmp; /* jump target name; for subst_finalize */
} u;
const struct subst *prev; /* for tracking availability of variables */
struct subst *next;
};
#define MULT_CHARS "GMkmunpf"
extern const char *fn;
struct subst *subst_match(const char *src, const char *re, char **res);
struct subst *subst_assign(const char *dst, enum relop op, const char *pat);
struct subst *subst_print(const char *var);
struct subst *subst_end(void);
struct subst *subst_ignore(void);
struct subst *subst_break(const char *block);
struct subst *subst_continue(const char *block);
void subst_finalize(struct subst *sub);
void subst_dump(FILE *file, const struct subst *sub);
void subst_init(void);
#endif /* !SUBST_H */