50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
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/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
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* details. If they are missing then this copy is in violation of *
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* the copyright conditions. */
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/*
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** lib_insdel.c
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**
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** The routine winsdel(win, n).
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** positive n insert n lines above current line
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** negative n delete n lines starting from current line
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**
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*/
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#include <stdlib.h>
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#include "curses.priv.h"
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#include <nterm.h>
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int
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winsdel(WINDOW *win, int n)
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{
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int ret, sscroll, stop, sbot;
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T(("winsdel(%x,%d) called", win, n));
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if (n == 0)
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return OK;
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if (n < 0 && win->_cury - n >= win->_maxy)
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/* request to delete too many lines */
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/* should we truncate to an appropriate number? */
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return ERR;
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sscroll = win->_scroll;
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stop = win->_regtop;
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sbot = win->_regbottom;
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win->_scroll = TRUE;
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win->_regtop = win->_cury;
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if (win->_regtop > win->_regbottom)
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win->_regbottom = win->_maxy;
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ret = wscrl(win, -n);
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win->_scroll = sscroll;
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win->_regtop = stop;
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win->_regbottom = sbot;
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return ret;
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}
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