Here are the data structures with brief descriptions:

C__file	FILE type structure
C_bdffile
C_ETSTIMER_
C_FDID
C_font
C_fontc
C_fontinfo
C_fontspecs
C_mat
C_printf_t	Undefine any potential macro version of these functions
C_sdev
C_xpt2046
Cbuffer_t
Ccont_
CDIR
Cdirent
Cdst_t	DST structure
CETSEventTag
Cex_regs
Cf_t	Format specifier flags
CFATFS
CFIL
CFILINFO
Cheader_t
Chinfo_t
Cmem_t
Cmime_t
Cp2_int16_t	2D display point - display coordinates are int16
Cp3_int16_t	3D display point - display coordinates are int16
Cp_ch_t	Data structure for character buffer with limits
Cpath_t
Cpoint	Point definition
Cputbuff
Cqueue_t	Queue structure
Crwbuf_t
CSDIO_CTRL
Cstat	POSIX stat structure
CTIMERS	User timer struct
Ctimespec	POSIX timespec
Ctimeval	POSIX timeval
Ctimezone	POSIX timezone
Ctm	POSIX struct tm
Cuint32_t_bytes
Cutimbuf	POSIX utimbuf structure
Cwindow
Cwire_e
Cwire_p
Cxpt2046_win	Initial calibration values for your display Note: these values are not rotated