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- // myLine.cpp
- //
- // 13 Jun 93 Init array[0] = NUL in case it is reference before use
- // memcpy() adjusted to also copy terminating NUL from is.get()
- // when extending buffer
- //
-
- # include <iostream.h>
- # include "myLine.h"
- # if defined(_MSC_VER)
- # include <memory.h>
- # else
- # include <stdlib.h>
- # endif
-
- // Class implementation
-
- myLine::myLine (short buflen)
- : len(buflen), mybuf(new char[len]), xalloc(1)
- {
- mybuf[0] = 0;
- }
-
- myLine::myLine (char * usebuf, short buflen)
- : len(buflen), mybuf(usebuf), xalloc(0)
- {
- mybuf[0] = 0;
- }
-
- myLine::~myLine (void)
- {
- if (xalloc)
- delete [] mybuf;
- }
-
-
- istream &
- operator>> (istream & is, myLine & l)
- {
- # if AUTO_GROW
- if (!l.xalloc) // It's not my buf, so it can't be grown
- {
- # endif
- is.get (l.mybuf, l.len);
- if (is.peek() == '\n')
- is.get(); // Remove newline from stream
- # if AUTO_GROW
- }
- else
- {
- int idx = 0;
- l.mybuf[0] = 0; // Terminate in case is.good() isn't
- for (int eol = 0; !eol && is.good(); )
- {
- int toget = l.len - idx;
- is.get (l.mybuf + idx, toget);
- int chrs = is.gcount();
- if (is.peek() == '\n')
- {
- ++eol; // Must be eol or eof
- is.get(); // Clear newline
- }
- else if (chrs)
- { // Extend buffer
- idx += chrs; // Add to index
- l.len = short(l.len + ALLOC_LEN);
- char * tmp = new char[l.len];
- memcpy (tmp, l.mybuf, idx + 1);
- delete [] l.mybuf;
- l.mybuf = tmp;
- }
- }
- }
- # endif
- return is;
- }
-