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#ifndef INCLUDED_CHARTAB_H_
#define INCLUDED_CHARTAB_H_
#include <sys/types.h>
#include <regex.h>
#include "../root/root.h"
#include "../stack/stack.h"
#include "../hashmap/hashmap.h"
#include "../string/string.h"
/*
Character tables are defined as arrays of 256 char *s and stored
by name in the symbol table. In d_chartab_st the addresses of the tables
are stored, stackwise, while d_active is always set to the stack's top to
speed up chartable access.
There is no default character table. If the default is requested, NULL is
pushed on the stack.
*/
typedef struct
{
Stack d_chartab_st; /* pointers to stacked character tables */
char **d_active; /* currently active character table NULL if */
/* the default (1:1) chartab is active */
regex_t d_regex; /* compiled regular expression */
regex_t d_regex_oct; /* compiled regular expression (octal char) */
regex_t d_regex_hex; /* compiled regular expression (hex char) */
}
Chartab;
extern int chartab_data; /* to ensure linkage via chartabconstruct.c */
void chartab_construct(void);
// PM: chartab_destruct
String *chartab_apply(char const *txt); /* returns transformed text */
/* MUST have active chartab */
Result chartab_find(char const **chartab);
Result chartab_insert(HashMap *symtab, char const *name, char *table);
Result chartab_pop(void); /* pop the most recent chartab */
/* activate the previous one */
/* push and activate the named */
/* chartab, or no chartab for */
/* an empty string */
Result chartab_use(HashMap *symtab, char const *name, bool pushIsTrue);
/*
Internal Chartab use only. Not used outside of this directory functions, needed here
to allow proper compilation of the static inline functions below
*/
extern Chartab chartab; /* there's only one chartab */
/* storage */
/* public interface continues from here */
static inline char const **chartab_active() /* returns active chartab or 0 */
{
return (char const **)chartab.d_active;
}
static inline bool chartab_isActive()
{
return chartab.d_active != NULL;
}
#endif
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