test_one_file    1320 contrib/libtests/pngimage.c test_one_file(struct display *dp, const char *filename)
test_one_file    3456 contrib/libtests/pngstest.c test_one_file(const char *file_name, format_list *formats, png_uint_32 opts,
test_one_file     829 pngtest.c      test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)