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- /* This is part of libio/iostream, providing -*- C++ -*- input/output.
- Copyright (C) 1993 Free Software Foundation
-
- This file is part of the GNU IO Library. This library is free
- software; you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- As a special exception, if you link this library with files
- compiled with a GNU compiler to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
- #include <libioP.h>
- #include "iostream.h"
- #include <string.h>
-
- istream& istream::getline(char* buf, int len, char delim)
- {
- _gcount = 0;
- if (ipfx1())
- {
- streambuf *sb = rdbuf();
- long count = _IO_getline(sb, buf, len, delim, -1);
- if (count == len-1)
- set(ios::failbit);
- else {
- int ch = sb->sbumpc();
- if (ch == EOF)
- set(ios::failbit|ios::eofbit);
- else if (ch == (unsigned char)delim)
- count++;
- else
- sb->sungetc(); // Leave delimiter unread.
- }
- _gcount = count;
- }
- return *this;
- }
-
- istream& istream::get(char* buf, int len, char delim)
- {
- _gcount = 0;
- if (ipfx1())
- {
- streambuf *sbuf = rdbuf();
- long count = _IO_getline(sbuf, buf, len, delim, -1);
- if (count < 0 || (count == 0 && sbuf->sgetc() == EOF))
- set(ios::failbit|ios::eofbit);
- else
- _gcount = count;
- }
- return *this;
- }
-
-
- // from Doug Schmidt
-
- #define CHUNK_SIZE 512
-
- /* Reads an arbitrarily long input line terminated by a user-specified
- TERMINATOR. Super-nifty trick using recursion avoids unnecessary calls
- to NEW! */
-
- char *_sb_readline (streambuf *sb, long& total, char terminator)
- {
- char buf[CHUNK_SIZE+1];
- char *ptr;
- int ch;
-
- long count = sb->sgetline(buf, CHUNK_SIZE+1, terminator, -1);
- if (count == EOF)
- return NULL;
- ch = sb->sbumpc();
- long old_total = total;
- total += count;
- if (ch != EOF && ch != terminator) {
- total++; // Include ch in total.
- ptr = _sb_readline(sb, total, terminator);
- if (ptr) {
- memcpy(ptr + old_total, buf, count);
- ptr[old_total+count] = ch;
- }
- return ptr;
- }
-
- if (ptr = new char[total+1]) {
- ptr[total] = '\0';
- memcpy(ptr + total - count, buf, count);
- return ptr;
- }
- else
- return NULL;
- }
-
- /* Reads an arbitrarily long input line terminated by TERMINATOR.
- This routine allocates its own memory, so the user should
- only supply the address of a (char *). */
-
- istream& istream::gets(char **s, char delim /* = '\n' */)
- {
- if (ipfx1()) {
- long size = 0;
- streambuf *sb = rdbuf();
- *s = _sb_readline (sb, size, delim);
- _gcount = *s ? size : 0;
- if (sb->_flags & _IO_EOF_SEEN) {
- set(ios::eofbit);
- if (_gcount == 0)
- set(ios::failbit);
- }
- }
- else {
- _gcount = 0;
- *s = NULL;
- }
- return *this;
- }
-