pango-default-break (text length analysis attrs-len)

text -- a string with the text to break, must be valid UTF-8
length -- an integer with the length of text in bytes (may be -1 if text is nul-terminated)
analysis -- a pango-analysis for text
attrs -- logical attributes to fill in
attrs-len -- an integer with the size of the array passed as attrs

This is the default break algorithm. It applies Unicode rules without language-specific tailoring, therefore the analyis argument is unused and can be NULL.

See the function pango-tailor-break for language-specific breaks. pango-tailor-break