| /* |
| Copyright (C) 1994 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 this library; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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. */ |
| |
| #ifdef __STDC__ |
| #include <stdlib.h> |
| #endif |
| #include "libioP.h" |
| #include <string.h> |
| #include <errno.h> |
| |
| /* Read up to (and including) a TERMINATOR from FP into *LINEPTR |
| (and null-terminate it). *LINEPTR is a pointer returned from malloc (or |
| NULL), pointing to *N characters of space. It is realloc'ed as |
| necessary. Returns the number of characters read (not including the |
| null terminator), or -1 on error or EOF. */ |
| |
| _IO_ssize_t |
| DEFUN(_IO_getdelim, (lineptr, n, delimiter, fp), |
| char **lineptr AND _IO_size_t *n AND int delimiter AND _IO_FILE *fp) |
| { |
| register _IO_ssize_t cur_len = 0; |
| _IO_ssize_t len; |
| |
| if (lineptr == NULL || n == NULL) |
| { |
| #ifdef EINVAL |
| errno = EINVAL; |
| #endif |
| return -1; |
| } |
| CHECK_FILE (fp, -1); |
| if (_IO_ferror (fp)) |
| return -1; |
| |
| if (*lineptr == NULL || *n == 0) |
| { |
| *n = 120; |
| *lineptr = (char *) malloc (*n); |
| if (*lineptr == NULL) |
| return -1; |
| } |
| |
| len = fp->_IO_read_end - fp->_IO_read_ptr; |
| if (len <= 0) |
| { |
| if (__underflow (fp) == EOF) |
| return -1; |
| len = fp->_IO_read_end - fp->_IO_read_ptr; |
| } |
| |
| for (;;) |
| { |
| _IO_size_t needed; |
| char *t; |
| t = (char *) memchr ((void *) fp->_IO_read_ptr, delimiter, len); |
| if (t != NULL) |
| len = (t - fp->_IO_read_ptr) + 1; |
| /* make enough space for len+1 (for final NUL) bytes. */ |
| needed = cur_len + len + 1; |
| if (needed > *n) |
| { |
| if (t == NULL && needed < 2 * *n) |
| needed = 2 * *n; /* Be generous. */ |
| *n = needed; |
| *lineptr = (char *) realloc (*lineptr, needed); |
| if (*lineptr == NULL) |
| return -1; |
| } |
| memcpy (*lineptr + cur_len, (void *) fp->_IO_read_ptr, len); |
| fp->_IO_read_ptr += len; |
| cur_len += len; |
| if (t != NULL || __underflow (fp) == EOF) |
| break; |
| len = fp->_IO_read_end - fp->_IO_read_ptr; |
| } |
| (*lineptr)[cur_len] = '\0'; |
| return cur_len; |
| } |