diff options
Diffstat (limited to 'REORG.TODO/libio/iogetwline.c')
| -rw-r--r-- | REORG.TODO/libio/iogetwline.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/REORG.TODO/libio/iogetwline.c b/REORG.TODO/libio/iogetwline.c new file mode 100644 index 0000000000..e60a590cc4 --- /dev/null +++ b/REORG.TODO/libio/iogetwline.c @@ -0,0 +1,113 @@ +/* Copyright (C) 1993-2017 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> +#include <wchar.h> + +#ifdef _LIBC +# define wmemcpy __wmemcpy +#endif + +_IO_size_t +_IO_getwline (_IO_FILE *fp, wchar_t *buf, _IO_size_t n, wint_t delim, + int extract_delim) +{ + return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0); +} + +/* 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_getwline_info (_IO_FILE *fp, wchar_t *buf, _IO_size_t n, wint_t delim, + int extract_delim, wint_t *eof) +{ + wchar_t *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->_wide_data->_IO_read_end + - fp->_wide_data->_IO_read_ptr); + if (len <= 0) + { + wint_t wc = __wuflow (fp); + if (wc == WEOF) + { + if (eof) + *eof = wc; + break; + } + if (wc == delim) + { + if (extract_delim > 0) + *ptr++ = wc; + else if (extract_delim < 0) + _IO_sputbackc (fp, wc); + if (extract_delim > 0) + ++len; + return ptr - buf; + } + *ptr++ = wc; + n--; + } + else + { + wchar_t *t; + if ((_IO_size_t) len >= n) + len = n; + t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len); + if (t != NULL) + { + _IO_size_t old_len = ptr - buf; + len = t - fp->_wide_data->_IO_read_ptr; + if (extract_delim >= 0) + { + ++t; + if (extract_delim > 0) + ++len; + } + wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, + len); + fp->_wide_data->_IO_read_ptr = t; + return old_len + len; + } + wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len); + fp->_wide_data->_IO_read_ptr += len; + ptr += len; + n -= len; + } + } + return ptr - buf; +} |