diff -r cc204fc56c9c -r a9a1d07a6840 src/cx/properties.h
--- a/src/cx/properties.h	Sat Nov 02 13:48:53 2024 +0100
+++ b/src/cx/properties.h	Sat Nov 02 19:27:45 2024 +0100
@@ -42,6 +42,7 @@
 #include "array_list.h"
 
 #include <stdio.h>
+#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -371,7 +372,13 @@
     cxPropertiesInit(prop, cx_properties_config_default)
 
 /**
- * Sets an input buffer.
+ * Fills the input buffer with data.
+ *
+ * Currently unprocessed data is copied to a temporary buffer.
+ * This temporary buffer is allocated on the heap, unless you specified
+ * a buffer on the stack with #cxPropertiesUseStack().
+ * In that case, the stack buffer is used, until the capacity is not sufficient
+ * anymore.
  *
  * After calling this function, you can parse the data by calling
  * cxPropertiesNext() until the status is #CX_PROPERTIES_NO_DATA.
@@ -379,18 +386,19 @@
  * @param prop the properties interface
  * @param buf a pointer to data
  * @param len the length of the data
+ * @return non-zero when a memory allocation was necessary but failed
  */
 __attribute__((__nonnull__))
-void cxPropertiesInput(
+int cxPropertiesFilln(
         CxProperties *prop,
         const char *buf,
         size_t len
 );
 
 /**
- * Sets a new input buffer after copying the current unprocessed data
- * to a temporary buffer.
+ * Fills the input buffer with a string.
  *
+ * Currently unprocessed data is copied to a temporary buffer.
  * This temporary buffer is allocated on the heap, unless you specified
  * a buffer on the stack with #cxPropertiesUseStack().
  * In that case, the stack buffer is used, until the capacity is not sufficient
@@ -400,16 +408,60 @@
  * copied, it behaves exactly as #cxPropertiesInput().
  *
  * @param prop the properties interface
- * @param buf a pointer to data
- * @param len the length of the data
+ * @param str the string
+ * @return non-zero when a memory allocation was necessary but failed
+ */
+#define cxPropertiesFill(prop, str) _Generic((str), \
+    cxstring: cx_properties_fill_cxstr,             \
+    cxmutstr: cx_properties_fill_mutstr,            \
+    char*: cx_properties_fill_str,                  \
+    const char*: cx_properties_fill_str)            \
+    (prop, str)
+
+/**
+ * Implementation of cxPropertiesFill() for cxstring.
+ *
+ * @param prop the properties interface
+ * @param str the string
  * @return non-zero when a memory allocation was necessary but failed
  */
 __attribute__((__nonnull__))
-int cxPropertiesFill(
+static inline int cx_properties_fill_cxstr(
+        CxProperties *prop,
+        cxstring str
+) {
+    return cxPropertiesFilln(prop, str.ptr, str.length);
+}
+
+/**
+ * Implementation of cxPropertiesFill() for cxmutstr.
+ *
+ * @param prop the properties interface
+ * @param str the string
+ * @return non-zero when a memory allocation was necessary but failed
+ */
+__attribute__((__nonnull__))
+static inline int cx_properties_fill_mutstr(
         CxProperties *prop,
-        const char *buf,
-        size_t len
-);
+        cxmutstr str
+) {
+    return cxPropertiesFilln(prop, str.ptr, str.length);
+}
+
+/**
+ * Implementation of cxPropertiesFill() for zero terminated C strings.
+ *
+ * @param prop the properties interface
+ * @param str the string
+ * @return non-zero when a memory allocation was necessary but failed
+ */
+__attribute__((__nonnull__))
+static inline int cx_properties_fill_str(
+        CxProperties *prop,
+        const char *str
+) {
+    return cxPropertiesFilln(prop, str, strlen(str));
+}
 
 /**
  * Specifies stack memory that shall be used by #cxPropertiesFill().