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#include "c_defs.h"
/************************************************************************
*
* ibuf.c - input buffering to support Function key macros
* Jon Trulson 3/30/96
*
* $Id: ibuf.c,v 1.8 2004/05/08 21:01:41 jon Exp $
*
* Copyright 1999-2004 Jon Trulson under the ARTISTIC LICENSE. (See LICENSE).
**********************************************************************/
/**********************************************************************/
/* Unix/C specific porting and supporting code Copyright (C)1994-1996 */
/* by Jon Trulson <jon@radscan.com> under the same terms and */
/* conditions of the original copyright by Jef Poskanzer and Craig */
/* Leres. */
/* */
/**********************************************************************/
#include "conf.h"
#include "global.h"
#include "defs.h"
#include "ibuf.h"
/* the buffer */
static unsigned int *rp, *wp;
static int ndata;
static unsigned int data[IBUFMAX];
/* iBufInit - intialize the input buffer */
void iBufInit(void)
{
data[0] = 0;
rp = wp = data;
ndata = 0;
return;
}
/* iBufEmpty - return TRUE or FALSE depending on whether the buffer is
* empty
*/
int iBufCount(void)
{
return ndata;
}
static int putRing(int *buf, int len)
{
int left, wlen = len, i;
int *rptr = buf;
left = IBUFMAX - ndata; /* max space available */
/* a null buf means to simply return the space left */
if (!rptr)
return(left);
if (wlen > left)
wlen = left;
if (rptr != NULL)
{
for (i=0; i < wlen; i++, rptr++)
{
if ( wp >= (data + IBUFMAX) )
wp = data;
*wp = *rptr;
ndata++;
wp++;
}
}
return(wlen);
}
static int getRing(int *buf, int len, int update)
{
unsigned int *wptr = buf, *rptr = rp;
int rlen = len, tlen, numdata = ndata;
if (rlen > ndata)
rlen = ndata;
tlen = rlen;
while (rlen--)
{
if (rptr >= (data + IBUFMAX))
rptr = data;
if (wptr) /* NULL buf doesn't copy data - Pop */
{
*wptr = *rptr;
wptr++;
}
rptr++;
numdata--;
}
if (update)
{
rp = rptr;
ndata = numdata;
}
return(tlen);
}
/* iBufPut - put a string into the buffer */
void iBufPut(char *thestr)
{
int i;
int n = strlen(thestr);
int idata[IBUFMAX];
/* cvt to int array */
for (i=0; i<n; i++)
idata[i] = thestr[i] & 0xff;
putRing(idata, n);
return;
}
/* iBufPutc - put a char into the buffer */
void iBufPutc(unsigned int thechar)
{
putRing(&thechar, 1);
return;
}
/* iBufGetCh - return next char from the input buffer */
unsigned int iBufGetCh(void)
{
static int c;
if (!iBufCount())
{
/* clog("IBUF GETC EMPTY, returning 0\n");*/
return('\0');
}
getRing(&c, 1, TRUE);
return(c);
}
/* DoMacro - stuff the buffer if an fkey pressed */
int DoMacro(int fkey)
{
if (fkey < 0 || fkey >= MAX_MACROS)
{
#ifdef DEBUG_MACROS
clog("DoMacro(): KEY_F(0) = %d, KEY_F(MAX_MACROS) = %d ch = %d, fkey = %d",
KEY_F(0), KEY_F(MAX_MACROS), ch, fkey);
clog("DoMacro(): got invalid Fkey: %d", ch);
#endif
return(FALSE);
}
iBufPut(UserConf.MacrosF[fkey]);
#ifdef DEBUG_MACROS
clog("DoMacro(): got an FKey: %d", ch);
#endif
return(TRUE);
}
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