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-rw-r--r--src/basic/string-table.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/basic/string-table.h b/src/basic/string-table.h
new file mode 100644
index 0000000..e3a26a6
--- /dev/null
+++ b/src/basic/string-table.h
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#pragma once
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.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) { \
+ if (!s) \
+ return -EINVAL; \
+ int b = parse_boolean(s); \
+ if (b == 0) \
+ return (type) 0; \
+ 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) && name##_table[i]) { \
+ 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) \
+ scope type name##_from_string(const char *s) { \
+ unsigned u = 0; \
+ type i; \
+ if (!s) \
+ return -EINVAL; \
+ i = (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
+ if (i >= 0) \
+ return i; \
+ if (safe_atou(s, &u) < 0) \
+ return -EINVAL; \
+ if (u > max) \
+ return -EINVAL; \
+ return (type) u; \
+ }
+
+#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)
+
+#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)
+
+#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
+#define DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,)
+#define DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(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,)
+#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes) _DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(name,type,yes,static)
+#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes) \
+ _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(name,type,yes,static)
+
+/* 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,)
+
+#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)
+
+#define DUMP_STRING_TABLE(name,type,max) \
+ do { \
+ flockfile(stdout); \
+ for (type _k = 0; _k < (max); _k++) { \
+ const char *_t; \
+ _t = name##_to_string(_k); \
+ if (!_t) \
+ continue; \
+ fputs_unlocked(_t, stdout); \
+ fputc_unlocked('\n', stdout); \
+ } \
+ funlockfile(stdout); \
+ } while (false)