diff options
Diffstat (limited to 'REORG.TODO/libio/wgenops.c')
| -rw-r--r-- | REORG.TODO/libio/wgenops.c | 698 |
1 files changed, 698 insertions, 0 deletions
diff --git a/REORG.TODO/libio/wgenops.c b/REORG.TODO/libio/wgenops.c new file mode 100644 index 0000000000..d8072abea0 --- /dev/null +++ b/REORG.TODO/libio/wgenops.c @@ -0,0 +1,698 @@ +/* Copyright (C) 1993-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Written by Ulrich Drepper <drepper@cygnus.com>. + Based on the single byte version by Per Bothner <bothner@cygnus.com>. + + 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. */ + +/* Generic or default I/O operations. */ + +#include "libioP.h" +#include <stdlib.h> +#include <string.h> +#include <wchar.h> + + +#ifndef _LIBC +# define __wmemcpy(dst, src, n) wmemcpy (dst, src, n) +#endif + + +static int save_for_wbackup (_IO_FILE *fp, wchar_t *end_p) __THROW +#ifdef _LIBC + internal_function +#endif + ; + +/* Return minimum _pos markers + Assumes the current get area is the main get area. */ +_IO_ssize_t +_IO_least_wmarker (_IO_FILE *fp, wchar_t *end_p) +{ + _IO_ssize_t least_so_far = end_p - fp->_wide_data->_IO_read_base; + struct _IO_marker *mark; + for (mark = fp->_markers; mark != NULL; mark = mark->_next) + if (mark->_pos < least_so_far) + least_so_far = mark->_pos; + return least_so_far; +} +libc_hidden_def (_IO_least_wmarker) + +/* Switch current get area from backup buffer to (start of) main get area. */ +void +_IO_switch_to_main_wget_area (_IO_FILE *fp) +{ + wchar_t *tmp; + fp->_flags &= ~_IO_IN_BACKUP; + /* Swap _IO_read_end and _IO_save_end. */ + tmp = fp->_wide_data->_IO_read_end; + fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; + fp->_wide_data->_IO_save_end= tmp; + /* Swap _IO_read_base and _IO_save_base. */ + tmp = fp->_wide_data->_IO_read_base; + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; + fp->_wide_data->_IO_save_base = tmp; + /* Set _IO_read_ptr. */ + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; +} +libc_hidden_def (_IO_switch_to_main_wget_area) + + +/* Switch current get area from main get area to (end of) backup area. */ +void +_IO_switch_to_wbackup_area (_IO_FILE *fp) +{ + wchar_t *tmp; + fp->_flags |= _IO_IN_BACKUP; + /* Swap _IO_read_end and _IO_save_end. */ + tmp = fp->_wide_data->_IO_read_end; + fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; + fp->_wide_data->_IO_save_end = tmp; + /* Swap _IO_read_base and _IO_save_base. */ + tmp = fp->_wide_data->_IO_read_base; + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; + fp->_wide_data->_IO_save_base = tmp; + /* Set _IO_read_ptr. */ + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; +} +libc_hidden_def (_IO_switch_to_wbackup_area) + + +void +_IO_wsetb (_IO_FILE *f, wchar_t *b, wchar_t *eb, int a) +{ + if (f->_wide_data->_IO_buf_base && !(f->_flags2 & _IO_FLAGS2_USER_WBUF)) + free (f->_wide_data->_IO_buf_base); + f->_wide_data->_IO_buf_base = b; + f->_wide_data->_IO_buf_end = eb; + if (a) + f->_flags2 &= ~_IO_FLAGS2_USER_WBUF; + else + f->_flags2 |= _IO_FLAGS2_USER_WBUF; +} +libc_hidden_def (_IO_wsetb) + + +wint_t +_IO_wdefault_pbackfail (_IO_FILE *fp, wint_t c) +{ + if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base + && !_IO_in_backup (fp) + && (wint_t) fp->_IO_read_ptr[-1] == c) + --fp->_IO_read_ptr; + else + { + /* Need to handle a filebuf in write mode (switch to read mode). FIXME!*/ + if (!_IO_in_backup (fp)) + { + /* We need to keep the invariant that the main get area + logically follows the backup area. */ + if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base + && _IO_have_wbackup (fp)) + { + if (save_for_wbackup (fp, fp->_wide_data->_IO_read_ptr)) + return WEOF; + } + else if (!_IO_have_wbackup (fp)) + { + /* No backup buffer: allocate one. */ + /* Use nshort buffer, if unused? (probably not) FIXME */ + int backup_size = 128; + wchar_t *bbuf = (wchar_t *) malloc (backup_size + * sizeof (wchar_t)); + if (bbuf == NULL) + return WEOF; + fp->_wide_data->_IO_save_base = bbuf; + fp->_wide_data->_IO_save_end = (fp->_wide_data->_IO_save_base + + backup_size); + fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_end; + } + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr; + _IO_switch_to_wbackup_area (fp); + } + else if (fp->_wide_data->_IO_read_ptr <= fp->_wide_data->_IO_read_base) + { + /* Increase size of existing backup buffer. */ + _IO_size_t new_size; + _IO_size_t old_size = (fp->_wide_data->_IO_read_end + - fp->_wide_data->_IO_read_base); + wchar_t *new_buf; + new_size = 2 * old_size; + new_buf = (wchar_t *) malloc (new_size * sizeof (wchar_t)); + if (new_buf == NULL) + return WEOF; + __wmemcpy (new_buf + (new_size - old_size), + fp->_wide_data->_IO_read_base, old_size); + free (fp->_wide_data->_IO_read_base); + _IO_wsetg (fp, new_buf, new_buf + (new_size - old_size), + new_buf + new_size); + fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_read_ptr; + } + + *--fp->_wide_data->_IO_read_ptr = c; + } + return c; +} +libc_hidden_def (_IO_wdefault_pbackfail) + + +void +_IO_wdefault_finish (_IO_FILE *fp, int dummy) +{ + struct _IO_marker *mark; + if (fp->_wide_data->_IO_buf_base && !(fp->_flags2 & _IO_FLAGS2_USER_WBUF)) + { + free (fp->_wide_data->_IO_buf_base); + fp->_wide_data->_IO_buf_base = fp->_wide_data->_IO_buf_end = NULL; + } + + for (mark = fp->_markers; mark != NULL; mark = mark->_next) + mark->_sbuf = NULL; + + if (fp->_IO_save_base) + { + free (fp->_wide_data->_IO_save_base); + fp->_IO_save_base = NULL; + } + +#ifdef _IO_MTSAFE_IO + if (fp->_lock != NULL) + _IO_lock_fini (*fp->_lock); +#endif + + _IO_un_link ((struct _IO_FILE_plus *) fp); +} +libc_hidden_def (_IO_wdefault_finish) + + +wint_t +_IO_wdefault_uflow (_IO_FILE *fp) +{ + wint_t wch; + wch = _IO_UNDERFLOW (fp); + if (wch == WEOF) + return WEOF; + return *fp->_wide_data->_IO_read_ptr++; +} +libc_hidden_def (_IO_wdefault_uflow) + + +wint_t +__woverflow (_IO_FILE *f, wint_t wch) +{ + if (f->_mode == 0) + _IO_fwide (f, 1); + return _IO_OVERFLOW (f, wch); +} +libc_hidden_def (__woverflow) + + +wint_t +__wuflow (_IO_FILE *fp) +{ + if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) + return WEOF; + + if (fp->_mode == 0) + _IO_fwide (fp, 1); + if (_IO_in_put_mode (fp)) + if (_IO_switch_to_wget_mode (fp) == EOF) + return WEOF; + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr++; + if (_IO_in_backup (fp)) + { + _IO_switch_to_main_wget_area (fp); + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr++; + } + if (_IO_have_markers (fp)) + { + if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) + return WEOF; + } + else if (_IO_have_wbackup (fp)) + _IO_free_wbackup_area (fp); + return _IO_UFLOW (fp); +} +libc_hidden_def (__wuflow) + +wint_t +__wunderflow (_IO_FILE *fp) +{ + if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) + return WEOF; + + if (fp->_mode == 0) + _IO_fwide (fp, 1); + if (_IO_in_put_mode (fp)) + if (_IO_switch_to_wget_mode (fp) == EOF) + return WEOF; + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr; + if (_IO_in_backup (fp)) + { + _IO_switch_to_main_wget_area (fp); + if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) + return *fp->_wide_data->_IO_read_ptr; + } + if (_IO_have_markers (fp)) + { + if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) + return WEOF; + } + else if (_IO_have_backup (fp)) + _IO_free_wbackup_area (fp); + return _IO_UNDERFLOW (fp); +} +libc_hidden_def (__wunderflow) + + +_IO_size_t +_IO_wdefault_xsputn (_IO_FILE *f, const void *data, _IO_size_t n) +{ + const wchar_t *s = (const wchar_t *) data; + _IO_size_t more = n; + if (more <= 0) + return 0; + for (;;) + { + /* Space available. */ + _IO_ssize_t count = (f->_wide_data->_IO_write_end + - f->_wide_data->_IO_write_ptr); + if (count > 0) + { + if ((_IO_size_t) count > more) + count = more; + if (count > 20) + { +#ifdef _LIBC + f->_wide_data->_IO_write_ptr = + __wmempcpy (f->_wide_data->_IO_write_ptr, s, count); +#else + memcpy (f->_wide_data->_IO_write_ptr, s, count); + f->_wide_data->_IO_write_ptr += count; +#endif + s += count; + } + else if (count <= 0) + count = 0; + else + { + wchar_t *p = f->_wide_data->_IO_write_ptr; + _IO_ssize_t i; + for (i = count; --i >= 0; ) + *p++ = *s++; + f->_wide_data->_IO_write_ptr = p; + } + more -= count; + } + if (more == 0 || __woverflow (f, *s++) == WEOF) + break; + more--; + } + return n - more; +} +libc_hidden_def (_IO_wdefault_xsputn) + + +_IO_size_t +_IO_wdefault_xsgetn (_IO_FILE *fp, void *data, _IO_size_t n) +{ + _IO_size_t more = n; + wchar_t *s = (wchar_t*) data; + for (;;) + { + /* Data available. */ + _IO_ssize_t count = (fp->_wide_data->_IO_read_end + - fp->_wide_data->_IO_read_ptr); + if (count > 0) + { + if ((_IO_size_t) count > more) + count = more; + if (count > 20) + { +#ifdef _LIBC + s = __wmempcpy (s, fp->_wide_data->_IO_read_ptr, count); +#else + memcpy (s, fp->_wide_data->_IO_read_ptr, count); + s += count; +#endif + fp->_wide_data->_IO_read_ptr += count; + } + else if (count <= 0) + count = 0; + else + { + wchar_t *p = fp->_wide_data->_IO_read_ptr; + int i = (int) count; + while (--i >= 0) + *s++ = *p++; + fp->_wide_data->_IO_read_ptr = p; + } + more -= count; + } + if (more == 0 || __wunderflow (fp) == WEOF) + break; + } + return n - more; +} +libc_hidden_def (_IO_wdefault_xsgetn) + + +void +_IO_wdoallocbuf (_IO_FILE *fp) +{ + if (fp->_wide_data->_IO_buf_base) + return; + if (!(fp->_flags & _IO_UNBUFFERED)) + if ((wint_t)_IO_WDOALLOCATE (fp) != WEOF) + return; + _IO_wsetb (fp, fp->_wide_data->_shortbuf, + fp->_wide_data->_shortbuf + 1, 0); +} +libc_hidden_def (_IO_wdoallocbuf) + + +int +_IO_wdefault_doallocate (_IO_FILE *fp) +{ + wchar_t *buf; + + buf = malloc (_IO_BUFSIZ); + if (__glibc_unlikely (buf == NULL)) + return EOF; + _IO_wsetb (fp, buf, buf + _IO_BUFSIZ, 1); + return 1; +} +libc_hidden_def (_IO_wdefault_doallocate) + + +int +_IO_switch_to_wget_mode (_IO_FILE *fp) +{ + if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base) + if ((wint_t)_IO_WOVERFLOW (fp, WEOF) == WEOF) + return EOF; + if (_IO_in_backup (fp)) + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_backup_base; + else + { + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_buf_base; + if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end) + fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr; + } + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_write_ptr; + + fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr + = fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_read_ptr; + + fp->_flags &= ~_IO_CURRENTLY_PUTTING; + return 0; +} +libc_hidden_def (_IO_switch_to_wget_mode) + +void +_IO_free_wbackup_area (_IO_FILE *fp) +{ + if (_IO_in_backup (fp)) + _IO_switch_to_main_wget_area (fp); /* Just in case. */ + free (fp->_wide_data->_IO_save_base); + fp->_wide_data->_IO_save_base = NULL; + fp->_wide_data->_IO_save_end = NULL; + fp->_wide_data->_IO_backup_base = NULL; +} +libc_hidden_def (_IO_free_wbackup_area) + +#if 0 +int +_IO_switch_to_wput_mode (_IO_FILE *fp) +{ + fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_read_ptr; + fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_read_ptr; + /* Following is wrong if line- or un-buffered? */ + fp->_wide_data->_IO_write_end = (fp->_flags & _IO_IN_BACKUP + ? fp->_wide_data->_IO_read_end + : fp->_wide_data->_IO_buf_end); + + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; + fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_end; + + fp->_flags |= _IO_CURRENTLY_PUTTING; + return 0; +} +#endif + + +static int +#ifdef _LIBC +internal_function +#endif +save_for_wbackup (_IO_FILE *fp, wchar_t *end_p) +{ + /* Append [_IO_read_base..end_p] to backup area. */ + _IO_ssize_t least_mark = _IO_least_wmarker (fp, end_p); + /* needed_size is how much space we need in the backup area. */ + _IO_size_t needed_size = ((end_p - fp->_wide_data->_IO_read_base) + - least_mark); + /* FIXME: Dubious arithmetic if pointers are NULL */ + _IO_size_t current_Bsize = (fp->_wide_data->_IO_save_end + - fp->_wide_data->_IO_save_base); + _IO_size_t avail; /* Extra space available for future expansion. */ + _IO_ssize_t delta; + struct _IO_marker *mark; + if (needed_size > current_Bsize) + { + wchar_t *new_buffer; + avail = 100; + new_buffer = (wchar_t *) malloc ((avail + needed_size) + * sizeof (wchar_t)); + if (new_buffer == NULL) + return EOF; /* FIXME */ + if (least_mark < 0) + { +#ifdef _LIBC + __wmempcpy (__wmempcpy (new_buffer + avail, + fp->_wide_data->_IO_save_end + least_mark, + -least_mark), + fp->_wide_data->_IO_read_base, + end_p - fp->_wide_data->_IO_read_base); +#else + memcpy (new_buffer + avail, + fp->_wide_data->_IO_save_end + least_mark, + -least_mark * sizeof (wchar_t)); + memcpy (new_buffer + avail - least_mark, + fp->_wide_data->_IO_read_base, + (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); +#endif + } + else + { +#ifdef _LIBC + __wmemcpy (new_buffer + avail, + fp->_wide_data->_IO_read_base + least_mark, + needed_size); +#else + memcpy (new_buffer + avail, + fp->_wide_data->_IO_read_base + least_mark, + needed_size * sizeof (wchar_t)); +#endif + } + free (fp->_wide_data->_IO_save_base); + fp->_wide_data->_IO_save_base = new_buffer; + fp->_wide_data->_IO_save_end = new_buffer + avail + needed_size; + } + else + { + avail = current_Bsize - needed_size; + if (least_mark < 0) + { +#ifdef _LIBC + __wmemmove (fp->_wide_data->_IO_save_base + avail, + fp->_wide_data->_IO_save_end + least_mark, + -least_mark); + __wmemcpy (fp->_wide_data->_IO_save_base + avail - least_mark, + fp->_wide_data->_IO_read_base, + end_p - fp->_wide_data->_IO_read_base); +#else + memmove (fp->_wide_data->_IO_save_base + avail, + fp->_wide_data->_IO_save_end + least_mark, + -least_mark * sizeof (wchar_t)); + memcpy (fp->_wide_data->_IO_save_base + avail - least_mark, + fp->_wide_data->_IO_read_base, + (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); +#endif + } + else if (needed_size > 0) +#ifdef _LIBC + __wmemcpy (fp->_wide_data->_IO_save_base + avail, + fp->_wide_data->_IO_read_base + least_mark, + needed_size); +#else + memcpy (fp->_wide_data->_IO_save_base + avail, + fp->_wide_data->_IO_read_base + least_mark, + needed_size * sizeof (wchar_t)); +#endif + } + fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_base + avail; + /* Adjust all the streammarkers. */ + delta = end_p - fp->_wide_data->_IO_read_base; + for (mark = fp->_markers; mark != NULL; mark = mark->_next) + mark->_pos -= delta; + return 0; +} + +wint_t +_IO_sputbackwc (_IO_FILE *fp, wint_t c) +{ + wint_t result; + + if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base + && (wchar_t)fp->_wide_data->_IO_read_ptr[-1] == (wchar_t) c) + { + fp->_wide_data->_IO_read_ptr--; + result = c; + } + else + result = _IO_PBACKFAIL (fp, c); + + if (result != WEOF) + fp->_flags &= ~_IO_EOF_SEEN; + + return result; +} +libc_hidden_def (_IO_sputbackwc) + +wint_t +_IO_sungetwc (_IO_FILE *fp) +{ + wint_t result; + + if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base) + { + fp->_wide_data->_IO_read_ptr--; + result = *fp->_wide_data->_IO_read_ptr; + } + else + result = _IO_PBACKFAIL (fp, EOF); + + if (result != WEOF) + fp->_flags &= ~_IO_EOF_SEEN; + + return result; +} + + +unsigned +_IO_adjust_wcolumn (unsigned start, const wchar_t *line, int count) +{ + const wchar_t *ptr = line + count; + while (ptr > line) + if (*--ptr == L'\n') + return line + count - ptr - 1; + return start + count; +} + +void +_IO_init_wmarker (struct _IO_marker *marker, _IO_FILE *fp) +{ + marker->_sbuf = fp; + if (_IO_in_put_mode (fp)) + _IO_switch_to_wget_mode (fp); + if (_IO_in_backup (fp)) + marker->_pos = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end; + else + marker->_pos = (fp->_wide_data->_IO_read_ptr + - fp->_wide_data->_IO_read_base); + + /* Should perhaps sort the chain? */ + marker->_next = fp->_markers; + fp->_markers = marker; +} + +#define BAD_DELTA EOF + +/* Return difference between MARK and current position of MARK's stream. */ +int +_IO_wmarker_delta (struct _IO_marker *mark) +{ + int cur_pos; + if (mark->_sbuf == NULL) + return BAD_DELTA; + if (_IO_in_backup (mark->_sbuf)) + cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr + - mark->_sbuf->_wide_data->_IO_read_end); + else + cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr + - mark->_sbuf->_wide_data->_IO_read_base); + return mark->_pos - cur_pos; +} + +int +_IO_seekwmark (_IO_FILE *fp, struct _IO_marker *mark, int delta) +{ + if (mark->_sbuf != fp) + return EOF; + if (mark->_pos >= 0) + { + if (_IO_in_backup (fp)) + _IO_switch_to_main_wget_area (fp); + fp->_wide_data->_IO_read_ptr = (fp->_wide_data->_IO_read_base + + mark->_pos); + } + else + { + if (!_IO_in_backup (fp)) + _IO_switch_to_wbackup_area (fp); + fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end + mark->_pos; + } + return 0; +} + +void +_IO_unsave_wmarkers (_IO_FILE *fp) +{ + struct _IO_marker *mark = fp->_markers; + if (mark) + { +#ifdef TODO + streampos offset = seekoff (0, ios::cur, ios::in); + if (offset != EOF) + { + offset += eGptr () - Gbase (); + for ( ; mark != NULL; mark = mark->_next) + mark->set_streampos (mark->_pos + offset); + } + else + { + for ( ; mark != NULL; mark = mark->_next) + mark->set_streampos (EOF); + } +#endif + fp->_markers = 0; + } + + if (_IO_have_backup (fp)) + _IO_free_wbackup_area (fp); +} |