Man page - fcpatternadd(3)
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Manual
FcPatternAdd
NAMESYNOPSIS
DESCRIPTION
NAME
FcPatternAdd - Add a value to a pattern
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcPatternAdd (FcPattern * p , const char * object , FcValue value , FcBool append );
DESCRIPTION
Adds a single value to the list of values associated with the property named ‘object . If ‘append is FcTrue, the value is added at the end of any existing list, otherwise it is inserted at the beginning. ‘value’ is saved (with FcValueSave) when inserted into the pattern so that the library retains no reference to any application-supplied data structure.