mirror of
https://github.com/xcat2/xNBA.git
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119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
#include <curses.h>
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#include "core.h"
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/** @file
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*
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* MuCurses core functions
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*
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*/
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WINDOW _stdscr = {
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.attrs = A_DEFAULT,
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.ori_y = 0,
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.ori_x = 0,
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.curs_y = 0,
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.curs_x = 0,
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.scr = curscr,
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};
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/*
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* Primitives
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*/
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/**
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* Write a single character rendition to a window
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*
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* @v *win window in which to write
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* @v ch character rendition to write
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* @v wrap wrap "switch"
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*/
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void _wputch ( WINDOW *win, chtype ch, int wrap ) {
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/* make sure we set the screen cursor to the right position
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first! */
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win->scr->movetoyx( win->scr, win->ori_y + win->curs_y,
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win->ori_x + win->curs_x );
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win->scr->putc(win->scr, ch);
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if ( ++(win->curs_x) - win->width == 0 ) {
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if ( wrap == WRAP ) {
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win->curs_x = 0;
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/* specification says we should really scroll,
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but we have no buffer to scroll with, so we
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can only overwrite back at the beginning of
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the window */
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if ( ++(win->curs_y) - win->height == 0 )
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win->curs_y = 0;
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} else {
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(win->curs_x)--;
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}
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}
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}
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/**
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* Retreat the cursor back one position (useful for a whole host of
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* ops)
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*
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* @v *win window in which to retreat
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*/
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void _wcursback ( WINDOW *win ) {
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if ( win->curs_x == 0 ) {
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if ( win->curs_y == 0 )
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win->curs_y = win->height - 1;
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win->curs_x = win->width = 1;
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} else {
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win->curs_x--;
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}
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win->scr->movetoyx( win->scr, win->ori_y + win->curs_y,
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win->ori_x + win->curs_x );
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}
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/**
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* Write a chtype string to a window
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*
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* @v *win window in which to write
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* @v *chstr chtype string
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* @v wrap wrap "switch"
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* @v n write at most n chtypes
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*/
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void _wputchstr ( WINDOW *win, const chtype *chstr, int wrap, int n ) {
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for ( ; *chstr && n-- ; chstr++ ) {
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_wputch(win,*chstr,wrap);
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}
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}
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/**
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* Write a standard c-style string to a window
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*
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* @v *win window in which to write
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* @v *str string
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* @v wrap wrap "switch"
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* @v n write at most n chars from *str
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*/
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void _wputstr ( WINDOW *win, const char *str, int wrap, int n ) {
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for ( ; *str && n-- ; str++ ) {
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_wputch( win, *str | win->attrs, wrap );
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}
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}
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/**
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* Move a window's cursor to the specified position
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*
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* @v *win window to be operated on
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* @v y Y position
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* @v x X position
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* @ret rc return status code
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*/
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int wmove ( WINDOW *win, int y, int x ) {
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/* chech for out-of-bounds errors */
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if ( ( (unsigned)y >= win->height ) ||
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( (unsigned)x >= win->width ) ) {
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return ERR;
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}
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win->curs_y = y;
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win->curs_x = x;
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win->scr->movetoyx( win->scr, win->ori_y + win->curs_y,
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win->ori_x + win->curs_x );
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return OK;
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}
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