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// This is part of the iostream library, providing input/output for C++.
// Copyright (C) 1991 Per Bothner.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free
// Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "ioprivate.h"
// Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
// Read chars into buf (of size n), until delim is seen.
// Return number of chars read (at most n-1).
// If extract_delim < 0, leave delimiter unread.
// If extract_delim > 0, insert delim in output.
long streambuf::sgetline(char* buf, size_t n, char delim, int extract_delim)
{
register char *ptr = buf;
if (n <= 0)
return EOF;
n--; // Leave space for final '\0'.
do {
int len = egptr() - gptr();
if (len <= 0)
if (underflow() == EOF)
break;
else
len = egptr() - gptr();
if (len >= (int)n)
len = n;
char *t = (char*)memchr((void*)_gptr, delim, len);
if (t != NULL) {
size_t old_len = ptr-buf;
len = t - _gptr;
if (extract_delim >= 0) {
t++;
old_len++;
if (extract_delim > 0)
len++;
}
memcpy((void*)ptr, (void*)_gptr, len);
ptr[len] = 0;
_gptr = t;
return old_len + len;
}
memcpy((void*)ptr, (void*)_gptr, len);
_gptr += len;
ptr += len;
n -= len;
} while (n != 0);
*ptr = 0;
return ptr - buf;
}
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