gtypes: Rework checked arithmetic handling
Rather than using the fixed-type compiler builtins
(__builtin_uadd_overflow(), etc.), use the generic versions
(__builtin_add_overflow()). This avoids issues with matching the
definition of GLib types (such as guint and particularly gsize) to
basic C types (int, long, long long), as the mapping can vary
between platforms.
Adjust the fallback inline functions similarly.
Signed-off-by: Philip Withnall pwithnall@endlessos.org
Fixes: #2523 (closed)
Closes #2523 (closed)
Edited by Philip Withnall