| /* |
| 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 <string.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). |
| Does not put a terminating '\0' in buf. |
| If extract_delim < 0, leave delimiter unread. |
| If extract_delim > 0, insert delim in output. */ |
| |
| _IO_size_t |
| DEFUN(_IO_getline, (fp, buf, n, delim, extract_delim), |
| _IO_FILE *fp AND char* buf AND _IO_size_t n |
| AND int delim AND int extract_delim) |
| { |
| register char *ptr = buf; |
| do |
| { |
| _IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr; |
| char *t; |
| if (len <= 0) |
| if (__underflow(fp) == EOF) |
| break; |
| else |
| len = fp->_IO_read_end - fp->_IO_read_ptr; |
| if (len >= n) |
| len = n; |
| t = (char*)memchr((void*)fp->_IO_read_ptr, delim, len); |
| if (t != NULL) |
| { |
| _IO_size_t old_len = ptr-buf; |
| len = t - fp->_IO_read_ptr; |
| if (extract_delim >= 0) |
| { |
| t++; |
| if (extract_delim > 0) |
| len++; |
| } |
| memcpy((void*)ptr, (void*)fp->_IO_read_ptr, len); |
| fp->_IO_read_ptr = t; |
| return old_len + len; |
| } |
| memcpy((void*)ptr, (void*)fp->_IO_read_ptr, len); |
| fp->_IO_read_ptr += len; |
| ptr += len; |
| n -= len; |
| } while (n != 0); |
| return ptr - buf; |
| } |