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Diffstat (limited to '')
-rw-r--r-- | src/libknot/lookup.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/libknot/lookup.h b/src/libknot/lookup.h new file mode 100644 index 0000000..709713e --- /dev/null +++ b/src/libknot/lookup.h @@ -0,0 +1,88 @@ +/* Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + 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 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/*! + * \file + * + * \brief A general purpose lookup table. + * + * \addtogroup libknot + * @{ + */ + +#pragma once + +#include <string.h> +#include <strings.h> + +/*! + * \brief A general purpose lookup table. + */ +typedef struct knot_lookup { + int id; + const char *name; +} knot_lookup_t; + +/*! + * \brief Looks up the given name in the lookup table. + * + * \param table Lookup table. + * \param name Name to look up. + * + * \return Item in the lookup table with the given name or NULL if no such is + * present. + */ +inline static const knot_lookup_t *knot_lookup_by_name(const knot_lookup_t *table, const char *name) +{ + if (table == NULL || name == NULL) { + return NULL; + } + + while (table->name != NULL) { + if (strcasecmp(name, table->name) == 0) { + return table; + } + table++; + } + + return NULL; +} + +/*! + * \brief Looks up the given id in the lookup table. + * + * \param table Lookup table. + * \param id ID to look up. + * + * \return Item in the lookup table with the given id or NULL if no such is + * present. + */ +inline static const knot_lookup_t *knot_lookup_by_id(const knot_lookup_t *table, int id) +{ + if (table == NULL) { + return NULL; + } + + while (table->name != NULL) { + if (table->id == id) { + return table; + } + table++; + } + + return NULL; +} + +/*! @} */ |