Tcl_Interp *_i_n_t_e_r_p (in) Interpreter to use for error reporting.
char *_s_t_r_i_n_g (in) String containing name of cap style: one
of ```butt'', ``projecting'', or
``round''.
int *_c_a_p_P_t_r (out) Pointer to location in which to store X
cap style corresponding to _s_t_r_i_n_g.
int _c_a_p (in) Cap style: one of CCCCaaaappppBBBBuuuutttttttt,
CCCCaaaappppPPPPrrrroooojjjjeeeeccccttttiiiinnnngggg, or CCCCaaaappppRRRRoooouuuunnnndddd.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
TTTTkkkk____GGGGeeeettttCCCCaaaappppSSSSttttyyyylllleeee places in *_c_a_p_P_t_r the X cap style corresponding to _s_t_r_i_n_g.
This will be one of the values CCCCaaaappppBBBBuuuutttttttt, CCCCaaaappppPPPPrrrroooojjjjeeeeccccttttiiiinnnngggg, or CCCCaaaappppRRRRoooouuuunnnndddd. Cap
styles are typically used in X graphics contexts to indicate how the
end-points of lines should be capped. See the X documentation for
information on what each style implies.
Under normal circumstances the return value is TTTTCCCCLLLL____OOOOKKKK and _i_n_t_e_r_p is
unused. If _s_t_r_i_n_g doesn't contain a valid cap style or an abbreviation
of one of these names, then an error message is stored in _i_n_t_e_r_p->_r_e_s_u_l_t,
TTTTCCCCLLLL____EEEERRRRRRRROOOORRRR is returned, and *_c_a_p_P_t_r is unmodified.
TTTTkkkk____NNNNaaaammmmeeeeOOOOffffCCCCaaaappppSSSSttttyyyylllleeee is the logical inverse of TTTTkkkk____GGGGeeeettttCCCCaaaappppSSSSttttyyyylllleeee. Given a cap
style such as CCCCaaaappppBBBBuuuutttttttt it returns a statically-allocated string
corresponding to _c_a_p. If _c_a_p isn't a legal cap style, then ``unknown cap