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/* See LICENSE file for copyright and license details. */
#ifndef LIBPARSER_H
#define LIBPARSER_H
#include <stddef.h>
/* This is mostly internal (unless you want to programmatically create a grammar) { */
union libparser_sentence;
enum libparser_sentence_type {
LIBPARSER_SENTENCE_TYPE_CONCATENATION, /* .binary */
LIBPARSER_SENTENCE_TYPE_ALTERNATION, /* .binary */
LIBPARSER_SENTENCE_TYPE_REJECTION, /* .unary */
LIBPARSER_SENTENCE_TYPE_OPTIONAL, /* .unary */
LIBPARSER_SENTENCE_TYPE_REPEATED, /* .unary */
LIBPARSER_SENTENCE_TYPE_STRING, /* .string */
LIBPARSER_SENTENCE_TYPE_CHAR_RANGE, /* .char_range */
LIBPARSER_SENTENCE_TYPE_RULE, /* .rule */
LIBPARSER_SENTENCE_TYPE_EXCEPTION, /* (none) */
LIBPARSER_SENTENCE_TYPE_EOF /* (none) */
};
struct libparser_sentence_binary {
enum libparser_sentence_type type;
const union libparser_sentence *left;
const union libparser_sentence *right;
};
struct libparser_sentence_unary {
enum libparser_sentence_type type;
const union libparser_sentence *sentence;
};
struct libparser_sentence_string {
enum libparser_sentence_type type;
const char *string;
size_t length;
};
struct libparser_sentence_char_range {
enum libparser_sentence_type type;
unsigned char low;
unsigned char high;
};
struct libparser_sentence_rule {
enum libparser_sentence_type type;
const char *rule;
};
union libparser_sentence {
enum libparser_sentence_type type;
struct libparser_sentence_binary binary;
struct libparser_sentence_unary unary;
struct libparser_sentence_string string;
struct libparser_sentence_char_range char_range;
struct libparser_sentence_rule rule;
};
struct libparser_rule {
const char *name;
union libparser_sentence *sentence;
};
/* } */
struct libparser_unit {
const char *rule;
struct libparser_unit *in;
struct libparser_unit *next;
size_t start;
size_t end;
};
extern const struct libparser_rule *const libparser_rule_table[];
int libparser_parse_file(const struct libparser_rule *const rules[], const char *data, size_t length, struct libparser_unit **rootp);
#endif
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