libpsyc/src/variable.c

#include "lib.h"
#include <stdint.h>


/// Routing variables in alphabetical order.
const PsycString psyc_routing_vars[] =
{
	PSYC_C2STR("_amount_fragments"),
	PSYC_C2STR("_context"),
	//PSYC_C2STR("_count"),			// older PSYC
	PSYC_C2STR("_counter"),			// the name for this is supposed to be _count, not _counter
	PSYC_C2STR("_fragment"),
	//PSYC_C2STR("_length"),		// older PSYC
	PSYC_C2STR("_source"),
	//PSYC_C2STR("_source_identification"),	// older PSYC
	PSYC_C2STR("_source_identity"),
	PSYC_C2STR("_source_relay"),
	PSYC_C2STR("_source_relay_relay"),	// until you have a better idea.. is this really in use?
	PSYC_C2STR("_tag"),
	PSYC_C2STR("_tag_relay"),
	//PSYC_C2STR("_tag_reply"),		// older PSYC
	PSYC_C2STR("_target"),
	PSYC_C2STR("_target_forward"),
	PSYC_C2STR("_target_relay"),
	//PSYC_C2STR("_understand_modules"),	// older PSYC
	//PSYC_C2STR("_using_modules"),		// older PSYC
};

// Variable types in alphabetical order.
const PsycDictInt psyc_var_types[] =
{
	{PSYC_C2STR("_amount"),   PSYC_TYPE_AMOUNT},
	{PSYC_C2STR("_color"),    PSYC_TYPE_COLOR},
	{PSYC_C2STR("_date"),     PSYC_TYPE_DATE},
	{PSYC_C2STR("_degree"),   PSYC_TYPE_DEGREE},
	{PSYC_C2STR("_entity"),   PSYC_TYPE_ENTITY},
	{PSYC_C2STR("_flag"),     PSYC_TYPE_FLAG},
	{PSYC_C2STR("_language"), PSYC_TYPE_LANGUAGE},
	{PSYC_C2STR("_list"),     PSYC_TYPE_LIST},
	{PSYC_C2STR("_nick"),     PSYC_TYPE_NICK},
	{PSYC_C2STR("_page"),     PSYC_TYPE_PAGE},
	{PSYC_C2STR("_uniform"),  PSYC_TYPE_UNIFORM},
	{PSYC_C2STR("_time"),     PSYC_TYPE_TIME},
};

const size_t psyc_routing_vars_num = PSYC_NUM_ELEM(psyc_routing_vars);
const size_t psyc_var_types_num = PSYC_NUM_ELEM(psyc_var_types);

/**
 * Get the type of variable name.
 */
inline
PsycBool psyc_var_is_routing (const char *name, size_t len)
{
	size_t cursor = 1;
	uint8_t i, m = 0;
	int8_t matching[psyc_routing_vars_num]; // indexes of matching vars

	if (len < 2 || name[0] != '_')
		return PSYC_FALSE;

	// first find the vars with matching length
	for (i=0; i<psyc_routing_vars_num; i++)
		if (len == psyc_routing_vars[i].length)
			matching[m++] = i;

	matching[m] = -1; // mark the end of matching indexes

	while (cursor < len && matching[0] >= 0)
	{
		for (i = m = 0; i < psyc_routing_vars_num; i++)
		{
			if (matching[i] < 0)
				break; // reached the end of possible matches
			if (psyc_routing_vars[matching[i]].data[cursor] == name[cursor])
				matching[m++] = matching[i]; // found a match, update matching indexes
			else if (psyc_routing_vars[matching[i]].data[cursor] > name[cursor])
				break; // passed the possible matches in alphabetical order in the array
		}

		if (m < psyc_routing_vars_num)
			matching[m] = -1; // mark the end of matching indexes

		cursor++;
	}

	return matching[0] >= 0 ? PSYC_TRUE : PSYC_FALSE;
}

/**
 * Get the type of variable name.
 */
inline
PsycType psyc_var_type (const char *name, size_t len)
{
	int8_t m[psyc_var_types_num];
	return (PsycType) psyc_dict_lookup((PsycDict*)psyc_var_types, psyc_var_types_num,
                                     name, len, PSYC_YES, (int8_t*)&m);
}