Add string-helpers.c

src/common/meson.build

@@ -5,4 +5,5 @@ labwc_sources += files(
   'grab-file.c',
   'log.c',
   'spawn.c',
+  'string-helpers.c',
 )

src/common/string-helpers.c

@@ -0,0 +1,27 @@
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+
+static void
+rtrim(char **s)
+{
+	size_t len = strlen(*s);
+	if (!len) {
+		return;
+	}
+	char *end = *s + len - 1;
+	while (end >= *s && isspace(*end)) {
+		end--;
+	}
+	*(end + 1) = '\0';
+}
+
+char *
+string_strip(char *s)
+{
+	rtrim(&s);
+	while (isspace(*s)) {
+		s++;
+	}
+	return s;
+}