/* retoor <retoor@molodetz.nl> */
#ifndef LOREG_H
#define LOREG_H

#include <stddef.h>
#include <stdbool.h>

#define LOREG_VERSION "1.0.0"
#define LOREG_MAX_STATES 4096
#define LOREG_MAX_GROUPS 32

typedef enum {
    LOREG_OK = 0,
    LOREG_ERR_INVALID_PATTERN,
    LOREG_ERR_UNBALANCED_PAREN,
    LOREG_ERR_EMPTY_GROUP,
    LOREG_ERR_INVALID_QUANTIFIER,
    LOREG_ERR_INVALID_ESCAPE,
    LOREG_ERR_OUT_OF_MEMORY,
    LOREG_ERR_STATE_OVERFLOW
} loreg_error_t;

typedef struct {
    size_t start;
    size_t end;
    bool matched;
} loreg_group_t;

typedef struct {
    bool matched;
    size_t match_start;
    size_t match_end;
    loreg_group_t groups[LOREG_MAX_GROUPS];
    size_t group_count;
} loreg_match_t;

typedef struct loreg_regex loreg_regex_t;

loreg_regex_t *loreg_compile(const char *pattern, loreg_error_t *error);
void loreg_free(loreg_regex_t *regex);
bool loreg_match(loreg_regex_t *regex, const char *text, loreg_match_t *result);
bool loreg_search(loreg_regex_t *regex, const char *text, loreg_match_t *result);
const char *loreg_error_string(loreg_error_t error);

#endif