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authorLennart Poettering <lennart@poettering.net>2015-10-26 22:31:05 +0100
committerLennart Poettering <lennart@poettering.net>2015-10-27 13:25:56 +0100
commit8b43440b7ef4b81c69c31de7ff820dc07a780254 (patch)
tree595e6dbbf92dc2bc4ae92e21e1c99b2d61146ac8 /src/basic/string-table.h
parent8fcde01280adcbd07e8205b91ac52b06305b6208 (diff)
util-lib: move string table stuff into its own string-table.[ch]
Diffstat (limited to 'src/basic/string-table.h')
-rw-r--r--src/basic/string-table.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/basic/string-table.h b/src/basic/string-table.h
new file mode 100644
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--- /dev/null
+++ b/src/basic/string-table.h
@@ -0,0 +1,88 @@
+
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#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 <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(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(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)
+
+/* For string conversions where numbers are also acceptable */
+#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
+ 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; \
+ } \
+ 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; \
+ } \
+ struct __useless_struct_to_allow_trailing_semicolon__