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-rw-r--r--libio/iogetline.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/libio/iogetline.c b/libio/iogetline.c
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+++ b/libio/iogetline.c
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+/*
+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;
+}