Initial commit

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

1 files changed, 58 insertions, 0 deletions

diff --git a/lib/include/util.h b/lib/include/util.h
new file mode 100644
index 0000000..bed2ba7
--- /dev/null
+++ b/lib/include/util.h
@@ -0,0 +1,58 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <sys/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "config.h"
+
+#ifdef __GNUC__
+	#define NORETURN __attribute__((noreturn))
+#endif
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+typedef struct {
+	const char *name;
+	int value;
+} enum_map_t;
+
+
+/*
+	Read from fd until end-of-file or a line feed is encountered.
+
+	Returns NULL with errno set on failure. Returns NULL with errno
+	cleared if end-of-file is reached.
+
+	The line must be deallocated with free().
+*/
+char *rdline(int fd);
+
+/*
+	Split a line of the shape "key = value" into key and value part.
+
+	The key can contain alphanumeric characters and can be padded with
+	spaces or tabs.
+
+	The value can be either a sequence of alphanumeric characters, period
+	or underscore OR a string in quotation marks. For strings, the
+	quotation marks are removed and escape sequences are processed.
+
+	The value may also be padded with spaces or tabs but the line may not
+	contain anything else after the value, except for spaces, tabs or
+	the '#' symbol which is interpreted as start of a comment.
+*/
+int splitkv(char *line, char **key, char **value);
+
+/*
+	Search through an array of enum_map_t entries to resolve a string to
+	a numeric value. The end of the map is indicated by a sentinel entry
+	with the name set to NULL.
+*/
+const enum_map_t *enum_by_name(const enum_map_t *map, const char *name);
+
+char *strexpand(const char *inp, size_t argc, const char *const *argv);
+
+#endif /* UTIL_H */
+