35ca4ce022
xyz_from_string() functions defined with DEFINE_STRING_TABLE_LOOKUP() properly handle NULL strings already. make sure the equivalent functions defined with DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN() do the same.
120 lines
6.3 KiB
C
120 lines
6.3 KiB
C
|
|
#pragma once
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "macro.h"
|
|
#include "parse-util.h"
|
|
#include "string-util.h"
|
|
|
|
ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
|
|
|
|
/* For basic lookup tables with strictly enumerated entries */
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
|
|
scope const char *name##_to_string(type i) { \
|
|
if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
|
|
return NULL; \
|
|
return name##_table[i]; \
|
|
}
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
|
|
scope type name##_from_string(const char *s) { \
|
|
return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
|
|
}
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope) \
|
|
scope type name##_from_string(const char *s) { \
|
|
int b; \
|
|
if (!s) \
|
|
return -1; \
|
|
b = parse_boolean(s); \
|
|
if (b == 0) \
|
|
return (type) 0; \
|
|
else if (b > 0) \
|
|
return yes; \
|
|
return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
|
|
}
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,scope) \
|
|
scope int name##_to_string_alloc(type i, char **str) { \
|
|
char *s; \
|
|
if (i < 0 || i > max) \
|
|
return -ERANGE; \
|
|
if (i < (type) ELEMENTSOF(name##_table)) { \
|
|
s = strdup(name##_table[i]); \
|
|
if (!s) \
|
|
return -ENOMEM; \
|
|
} else { \
|
|
if (asprintf(&s, "%i", i) < 0) \
|
|
return -ENOMEM; \
|
|
} \
|
|
*str = s; \
|
|
return 0; \
|
|
}
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,scope) \
|
|
type name##_from_string(const char *s) { \
|
|
type i; \
|
|
unsigned u = 0; \
|
|
if (!s) \
|
|
return (type) -1; \
|
|
for (i = 0; i < (type) ELEMENTSOF(name##_table); i++) \
|
|
if (streq_ptr(name##_table[i], s)) \
|
|
return i; \
|
|
if (safe_atou(s, &u) >= 0 && u <= max) \
|
|
return (type) u; \
|
|
return (type) -1; \
|
|
} \
|
|
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
|
|
struct __useless_struct_to_allow_trailing_semicolon__
|
|
|
|
#define _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,scope) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope) \
|
|
struct __useless_struct_to_allow_trailing_semicolon__
|
|
|
|
#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
|
|
#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
|
|
#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
|
|
#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
|
|
|
|
#define DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes) _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,)
|
|
|
|
/* For string conversions where numbers are also acceptable */
|
|
#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,) \
|
|
struct __useless_struct_to_allow_trailing_semicolon__
|
|
|
|
#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,static)
|
|
#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max) \
|
|
_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,static)
|