1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// 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;
}
|
