systemd: move basic systemd library to shared/nm-utils
For better or worse, we already pull in large parts of systemd sources. I need a base64 decode implementation (because glib's g_base64_decode() cannot reject invalid encodings). Instead of coming up with my own or copy-paste if from somewhere, reuse systemd's unbase64mem(). But for that, make systemd's basic bits an independent static library first because I will need it in libnm-core. This doesn't really change anything except making "libnm-systemd-core.la" an indpendent static library that could be used from "libnm-core". We shall still be mindful about which internal code of systemd we use, and only access functionality that is exposed via "systemd/nm-sd-utils-shared.h".
This commit is contained in:
Thomas Haller
112
shared/systemd/src/basic/string-table.h
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112
shared/systemd/src/basic/string-table.h
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/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <errno.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include "macro.h"
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#include "parse-util.h"
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#include "string-util.h"
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ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
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/* For basic lookup tables with strictly enumerated entries */
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#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
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scope const char *name##_to_string(type i) { \
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if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
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return NULL; \
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return name##_table[i]; \
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}
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#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
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scope type name##_from_string(const char *s) { \
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return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
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}
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#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope) \
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scope type name##_from_string(const char *s) { \
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int b; \
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if (!s) \
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return -1; \
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b = parse_boolean(s); \
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if (b == 0) \
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return (type) 0; \
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else if (b > 0) \
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return yes; \
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return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
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}
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#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,scope) \
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scope int name##_to_string_alloc(type i, char **str) { \
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char *s; \
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if (i < 0 || i > max) \
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return -ERANGE; \
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if (i < (type) ELEMENTSOF(name##_table)) { \
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s = strdup(name##_table[i]); \
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if (!s) \
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return -ENOMEM; \
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} else { \
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if (asprintf(&s, "%i", i) < 0) \
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return -ENOMEM; \
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} \
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*str = s; \
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return 0; \
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}
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#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,scope) \
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scope type name##_from_string(const char *s) { \
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type i; \
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unsigned u = 0; \
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if (!s) \
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return (type) -1; \
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for (i = 0; i < (type) ELEMENTSOF(name##_table); i++) \
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if (streq_ptr(name##_table[i], s)) \
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return i; \
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if (safe_atou(s, &u) >= 0 && u <= max) \
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return (type) u; \
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return (type) -1; \
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} \
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#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope)
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#define _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
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_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,scope)
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#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
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#define DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes) _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,)
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/* For string conversions where numbers are also acceptable */
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#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
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_DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,) \
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_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max) \
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_DEFINE_STRING_TABLE_LOOKUP_TO_STRING_FALLBACK(name,type,max,static)
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#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max) \
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_DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_FALLBACK(name,type,max,static)
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#define DUMP_STRING_TABLE(name,type,max) \
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do { \
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type _k; \
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flockfile(stdout); \
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for (_k = 0; _k < (max); _k++) { \
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const char *_t; \
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_t = name##_to_string(_k); \
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if (!_t) \
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continue; \
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fputs_unlocked(_t, stdout); \
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fputc_unlocked('\n', stdout); \
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} \
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funlockfile(stdout); \
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} while(false)
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