diff -r ae61523bce20 -r 2f71f4ee247a ucx/cx/printf.h
--- a/ucx/cx/printf.h	Thu Oct 03 18:52:51 2024 +0200
+++ b/ucx/cx/printf.h	Sun Oct 06 18:18:04 2024 +0200
@@ -64,7 +64,7 @@
 int cx_fprintf(
         void *stream,
         cx_write_func wfc,
-        char const *fmt,
+        const char *fmt,
         ...
 );
 
@@ -83,7 +83,7 @@
 int cx_vfprintf(
         void *stream,
         cx_write_func wfc,
-        char const *fmt,
+        const char *fmt,
         va_list ap
 );
 
@@ -101,8 +101,8 @@
  */
 __attribute__((__nonnull__(1, 2), __format__(printf, 2, 3)))
 cxmutstr cx_asprintf_a(
-        CxAllocator const *allocator,
-        char const *fmt,
+        const CxAllocator *allocator,
+        const char *fmt,
         ...
 );
 
@@ -134,8 +134,8 @@
  */
 __attribute__((__nonnull__))
 cxmutstr cx_vasprintf_a(
-        CxAllocator const *allocator,
-        char const *fmt,
+        const CxAllocator *allocator,
+        const char *fmt,
         va_list ap
 );
 
@@ -168,12 +168,12 @@
 /**
  * An \c sprintf like function which reallocates the string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * @param str a pointer to the string buffer
- * @param len the current length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param fmt the format string
  * @param ... additional arguments
  * @return the length of produced string
@@ -183,32 +183,32 @@
 /**
  * An \c sprintf like function which reallocates the string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * \attention The original buffer MUST have been allocated with the same allocator!
  *
  * @param alloc the allocator to use
  * @param str a pointer to the string buffer
- * @param len the current length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param fmt the format string
  * @param ... additional arguments
  * @return the length of produced string
  */
-__attribute__((__nonnull__(1, 2, 4), __format__(printf, 4, 5)))
-int cx_sprintf_a(CxAllocator *alloc, char **str, size_t len, const char *fmt, ... );
+__attribute__((__nonnull__(1, 2, 3, 4), __format__(printf, 4, 5)))
+int cx_sprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, ... );
 
 
 /**
  * An \c sprintf like function which reallocates the string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * @param str a pointer to the string buffer
- * @param len the current length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param fmt the format string
  * @param ap argument list
  * @return the length of produced string
@@ -218,38 +218,38 @@
 /**
  * An \c sprintf like function which reallocates the string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * \attention The original buffer MUST have been allocated with the same allocator!
  *
  * @param alloc the allocator to use
  * @param str a pointer to the string buffer
- * @param len the current length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param fmt the format string
  * @param ap argument list
  * @return the length of produced string
  */
 __attribute__((__nonnull__))
-int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t len, const char *fmt, va_list ap);
+int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, va_list ap);
 
 
 /**
  * An \c sprintf like function which allocates a new string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * The location of the resulting string will \em always be stored to \p str. When the buffer
  * was sufficiently large, \p buf itself will be stored to the location of \p str.
  *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  * 
  * \remark When a new string needed to be allocated, the contents of \p buf will be
  * poisoned after the call, because this function tries to produce the string in \p buf, first.
  *
  * @param buf a pointer to the buffer
- * @param len the length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param str a pointer to the location
  * @param fmt the format string
  * @param ... additional arguments
@@ -260,42 +260,42 @@
 /**
  * An \c sprintf like function which allocates a new string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * The location of the resulting string will \em always be stored to \p str. When the buffer
  * was sufficiently large, \p buf itself will be stored to the location of \p str.
  *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * \remark When a new string needed to be allocated, the contents of \p buf will be
  * poisoned after the call, because this function tries to produce the string in \p buf, first.
  *
  * @param alloc the allocator to use
  * @param buf a pointer to the buffer
- * @param len the length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param str a pointer to the location
  * @param fmt the format string
  * @param ... additional arguments
  * @return the length of produced string
  */
 __attribute__((__nonnull__(1, 2, 4, 5), __format__(printf, 5, 6)))
-int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t len, char **str, const char *fmt, ... );
+int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, ... );
 
 /**
  * An \c sprintf like function which allocates a new string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * The location of the resulting string will \em always be stored to \p str. When the buffer
  * was sufficiently large, \p buf itself will be stored to the location of \p str.
  *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * \remark When a new string needed to be allocated, the contents of \p buf will be
  * poisoned after the call, because this function tries to produce the string in \p buf, first.
  *
  * @param buf a pointer to the buffer
- * @param len the length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param str a pointer to the location
  * @param fmt the format string
  * @param ap argument list
@@ -306,26 +306,26 @@
 /**
  * An \c sprintf like function which allocates a new string when the buffer is not large enough.
  *
+ * The size of the buffer will be updated in \p len when necessary.
+ *
  * The location of the resulting string will \em always be stored to \p str. When the buffer
  * was sufficiently large, \p buf itself will be stored to the location of \p str.
  *
  * \note The resulting string is guaranteed to be zero-terminated.
- * That means, when the buffer needed to be reallocated, the new size of the buffer will be
- * the length returned by this function plus one.
  *
  * \remark When a new string needed to be allocated, the contents of \p buf will be
  * poisoned after the call, because this function tries to produce the string in \p buf, first.
  *
  * @param alloc the allocator to use
  * @param buf a pointer to the buffer
- * @param len the length of the buffer
+ * @param len a pointer to the length of the buffer
  * @param str a pointer to the location
  * @param fmt the format string
  * @param ap argument list
  * @return the length of produced string
  */
 __attribute__((__nonnull__))
-int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t len, char **str, const char *fmt, va_list ap);
+int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, va_list ap);
 
 
 #ifdef __cplusplus