110 lines
1.6 KiB
C
110 lines
1.6 KiB
C
#include "bc_io.h"
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#include "lib.h"
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/* dtrg --- this originally used sgtty.h to do clever tty manipulation.
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* Strictly this should be converted to use termios, but for simplicity
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* we're going to stick with plain stdio for now. */
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/* BASIC has some nasty io characteristics */
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#define MAXWIDTH 255
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int _width = 75, _pos = 0, _zonewidth = 15;
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void _out(char* str)
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{
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int pos;
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if (_chann == -1)
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pos = _pos;
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else
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pos = _fdtable[_chann].pos;
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while (*str)
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{
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if (pos >= _width)
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{
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_outnl();
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pos = 0;
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}
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fputc(*str++, _chanwr);
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pos++;
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}
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if (_chann == -1)
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_pos = pos;
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else
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_fdtable[_chann].pos = pos;
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}
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void _outnl(void)
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{
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fputc('\n', _chanwr);
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if (_chann == -1)
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_pos = 0;
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else
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_fdtable[_chann].pos = 0;
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}
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void _zone(void)
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{
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/* go to next zone */
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int pos;
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if (_chann == -1)
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pos = _pos;
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else
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pos = _fdtable[_chann].pos;
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do
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{
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fputc(' ', _chanwr);
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pos++;
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if (pos == _width)
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{
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_outnl();
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pos = 0;
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break;
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}
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} while (pos % _zonewidth != 0);
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if (_chann == -1)
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_pos = pos;
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else
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_fdtable[_chann].pos = pos;
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}
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void _in(char* buf)
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{
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register int holder;
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char* c;
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int pos;
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if (_chann == -1)
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{
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pos = _pos;
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}
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else
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pos = _fdtable[_chann].pos;
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c = buf;
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while ((holder = fgetc(_chanrd)) != EOF && holder != '\n')
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{
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*c = holder;
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if (_chann == -1)
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putchar(holder);
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c++;
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pos++;
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}
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*c = 0;
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if (_chann == -1)
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{
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_pos = pos;
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}
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else
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_fdtable[_chann].pos = pos;
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}
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void _tab(int x)
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{
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if (x > _width)
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error(3);
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if (x < _pos)
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_outnl();
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_spc(x - _pos);
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}
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void _spc(int x)
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{
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while (x-- > 0)
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_out(" ");
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}
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