src/basic/string-table.h

8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#pragma once
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering/***
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  This file is part of systemd.
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  Copyright 2010 Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  systemd is free software; you can redistribute it and/or modify it
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  under the terms of the GNU Lesser General Public License as published by
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  (at your option) any later version.
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  systemd is distributed in the hope that it will be useful, but
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  Lesser General Public License for more details.
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  You should have received a copy of the GNU Lesser General Public License
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering***/
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
11c3a36649e5e5e77db499c92f3cdcbd619efd3aThomas Hindoe Paaboel Andersen#include <errno.h>
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include <stddef.h>
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include <stdio.h>
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include <string.h>
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include <sys/types.h>
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include "macro.h"
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include "parse-util.h"
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#include "string-util.h"
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poetteringssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering/* For basic lookup tables with strictly enumerated entries */
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope)          \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        scope const char *name##_to_string(type i) {                    \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                if (i < 0 || i >= (type) ELEMENTSOF(name##_table))      \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        return NULL;                                    \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                return name##_table[i];                                 \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        }
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope)        \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        scope type name##_from_string(const char *s) {                  \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        }
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope) \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering        scope type name##_from_string(const char *s) {                  \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                int b;                                                  \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                b = parse_boolean(s);                                   \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                if (b == 0)                                             \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                        return (type) 0;                                \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                else if (b > 0)                                         \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                        return yes;                                     \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering                return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering        }
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope)                    \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope)          \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope)        \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        struct __useless_struct_to_allow_trailing_semicolon__
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering#define _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,scope)   \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering        _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope)          \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering        _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope) \
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering        struct __useless_struct_to_allow_trailing_semicolon__
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering#define DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes) _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,)
b18b8662154b46f03ddeac00e52d157c87d474e3Lennart Poettering
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering/* For string conversions where numbers are also acceptable */
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max)         \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        int name##_to_string_alloc(type i, char **str) {                \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                char *s;                                                \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                if (i < 0 || i > max)                                   \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        return -ERANGE;                                 \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                if (i < (type) ELEMENTSOF(name##_table)) {              \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        s = strdup(name##_table[i]);                    \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        if (!s)                                         \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                                return -ENOMEM;                         \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                } else {                                                \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        if (asprintf(&s, "%i", i) < 0)                  \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                                return -ENOMEM;                         \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                }                                                       \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                *str = s;                                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                return 0;                                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        }                                                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        type name##_from_string(const char *s) {                        \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                type i;                                                 \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                unsigned u = 0;                                         \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                if (!s)                                                 \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        return (type) -1;                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                for (i = 0; i < (type) ELEMENTSOF(name##_table); i++)   \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        if (streq_ptr(name##_table[i], s))              \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                                return i;                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                if (safe_atou(s, &u) >= 0 && u <= max)                  \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                        return (type) u;                                \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering                return (type) -1;                                       \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        }                                                               \
8b43440b7ef4b81c69c31de7ff820dc07a780254Lennart Poettering        struct __useless_struct_to_allow_trailing_semicolon__