| /* Copyright (C) 1993-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. |
| |
| As a special exception, if you link the code in this file with |
| files compiled with a GNU compiler to produce an executable, |
| that does not cause the resulting executable to be covered by |
| the GNU Lesser General Public License. This exception does not |
| however invalidate any other reasons why the executable file |
| might be covered by the GNU Lesser General Public License. |
| This exception applies to code released by its copyright holders |
| in files containing the exception. */ |
| |
| #include "libioP.h" |
| #include <string.h> |
| |
| _IO_size_t |
| _IO_getline (fp, buf, n, delim, extract_delim) |
| _IO_FILE *fp; |
| char *buf; |
| _IO_size_t n; |
| int delim; |
| int extract_delim; |
| { |
| return _IO_getline_info (fp, buf, n, delim, extract_delim, (int *) 0); |
| } |
| libc_hidden_def (_IO_getline) |
| |
| /* 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 |
| _IO_getline_info (fp, buf, n, delim, extract_delim, eof) |
| _IO_FILE *fp; |
| char *buf; |
| _IO_size_t n; |
| int delim; |
| int extract_delim; |
| int *eof; |
| { |
| char *ptr = buf; |
| if (eof != NULL) |
| *eof = 0; |
| if (__builtin_expect (fp->_mode, -1) == 0) |
| _IO_fwide (fp, -1); |
| while (n != 0) |
| { |
| _IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr; |
| if (len <= 0) |
| { |
| int c = __uflow (fp); |
| if (c == EOF) |
| { |
| if (eof) |
| *eof = c; |
| break; |
| } |
| if (c == delim) |
| { |
| if (extract_delim > 0) |
| *ptr++ = c; |
| else if (extract_delim < 0) |
| _IO_sputbackc (fp, c); |
| if (extract_delim > 0) |
| ++len; |
| return ptr - buf; |
| } |
| *ptr++ = c; |
| n--; |
| } |
| else |
| { |
| char *t; |
| if ((_IO_size_t) 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; |
| } |
| } |
| return ptr - buf; |
| } |
| libc_hidden_def (_IO_getline_info) |
