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-rw-r--r--libio/wstrops.c159
1 files changed, 93 insertions, 66 deletions
diff --git a/libio/wstrops.c b/libio/wstrops.c
index 2b9d0368f3..6626f2f711 100644
--- a/libio/wstrops.c
+++ b/libio/wstrops.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1993-2016 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2018 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
@@ -32,19 +32,19 @@
#include <stdio_ext.h>
void
-_IO_wstr_init_static (_IO_FILE *fp, wchar_t *ptr, _IO_size_t size,
+_IO_wstr_init_static (FILE *fp, wchar_t *ptr, size_t size,
wchar_t *pstart)
{
wchar_t *end;
if (size == 0)
end = ptr + __wcslen (ptr);
- else if ((_IO_size_t) ptr + size * sizeof (wchar_t) > (_IO_size_t) ptr)
+ else if ((size_t) ptr + size * sizeof (wchar_t) > (size_t) ptr)
end = ptr + size;
else
/* Even for misaligned ptr make sure there is integral number of wide
characters. */
- end = ptr + (-1 - (_IO_size_t) ptr) / sizeof (wchar_t);
+ end = ptr + (-1 - (size_t) ptr) / sizeof (wchar_t);
_IO_wsetb (fp, ptr, end, 0);
fp->_wide_data->_IO_write_base = ptr;
@@ -63,14 +63,14 @@ _IO_wstr_init_static (_IO_FILE *fp, wchar_t *ptr, _IO_size_t size,
fp->_wide_data->_IO_read_end = end;
}
/* A null _allocate_buffer function flags the strfile as being static. */
- (((_IO_strfile *) fp)->_s._allocate_buffer) = (_IO_alloc_type)0;
+ (((_IO_strfile *) fp)->_s._allocate_buffer_unused) = (_IO_alloc_type)0;
}
-_IO_wint_t
-_IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
+wint_t
+_IO_wstr_overflow (FILE *fp, wint_t c)
{
int flush_only = c == WEOF;
- _IO_size_t pos;
+ size_t pos;
if (fp->_flags & _IO_NO_WRITES)
return flush_only ? 0 : WEOF;
if ((fp->_flags & _IO_TIED_PUT_GET) && !(fp->_flags & _IO_CURRENTLY_PUTTING))
@@ -80,7 +80,7 @@ _IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
}
pos = fp->_wide_data->_IO_write_ptr - fp->_wide_data->_IO_write_base;
- if (pos >= (_IO_size_t) (_IO_wblen (fp) + flush_only))
+ if (pos >= (size_t) (_IO_wblen (fp) + flush_only))
{
if (fp->_flags2 & _IO_FLAGS2_USER_WBUF) /* not allowed to enlarge */
return WEOF;
@@ -89,15 +89,13 @@ _IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
wchar_t *new_buf;
wchar_t *old_buf = fp->_wide_data->_IO_buf_base;
size_t old_wblen = _IO_wblen (fp);
- _IO_size_t new_size = 2 * old_wblen + 100;
+ size_t new_size = 2 * old_wblen + 100;
if (__glibc_unlikely (new_size < old_wblen)
|| __glibc_unlikely (new_size > SIZE_MAX / sizeof (wchar_t)))
return EOF;
- new_buf
- = (wchar_t *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (new_size
- * sizeof (wchar_t));
+ new_buf = malloc (new_size * sizeof (wchar_t));
if (new_buf == NULL)
{
/* __ferror(fp) = 1; */
@@ -106,12 +104,12 @@ _IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
if (old_buf)
{
__wmemcpy (new_buf, old_buf, old_wblen);
- (*((_IO_strfile *) fp)->_s._free_buffer) (old_buf);
+ free (old_buf);
/* Make sure _IO_setb won't try to delete _IO_buf_base. */
fp->_wide_data->_IO_buf_base = NULL;
}
- wmemset (new_buf + old_wblen, L'\0', new_size - old_wblen);
+ __wmemset (new_buf + old_wblen, L'\0', new_size - old_wblen);
_IO_wsetb (fp, new_buf, new_buf + new_size, 1);
fp->_wide_data->_IO_read_base =
@@ -136,8 +134,8 @@ _IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
}
-_IO_wint_t
-_IO_wstr_underflow (_IO_FILE *fp)
+wint_t
+_IO_wstr_underflow (FILE *fp)
{
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;
@@ -155,8 +153,8 @@ _IO_wstr_underflow (_IO_FILE *fp)
/* The size of the valid part of the buffer. */
-_IO_ssize_t
-_IO_wstr_count (_IO_FILE *fp)
+ssize_t
+_IO_wstr_count (FILE *fp)
{
struct _IO_wide_data *wd = fp->_wide_data;
@@ -167,35 +165,33 @@ _IO_wstr_count (_IO_FILE *fp)
static int
-enlarge_userbuf (_IO_FILE *fp, _IO_off64_t offset, int reading)
+enlarge_userbuf (FILE *fp, off64_t offset, int reading)
{
- if ((_IO_ssize_t) offset <= _IO_blen (fp))
+ if ((ssize_t) offset <= _IO_wblen (fp))
return 0;
struct _IO_wide_data *wd = fp->_wide_data;
- _IO_ssize_t oldend = wd->_IO_write_end - wd->_IO_write_base;
+ ssize_t oldend = wd->_IO_write_end - wd->_IO_write_base;
/* Try to enlarge the buffer. */
if (fp->_flags2 & _IO_FLAGS2_USER_WBUF)
/* User-provided buffer. */
return 1;
- _IO_size_t newsize = offset + 100;
+ size_t newsize = offset + 100;
if (__glibc_unlikely (newsize > SIZE_MAX / sizeof (wchar_t)))
return 1;
wchar_t *oldbuf = wd->_IO_buf_base;
- wchar_t *newbuf
- = (wchar_t *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (newsize
- * sizeof (wchar_t));
+ wchar_t *newbuf = malloc (newsize * sizeof (wchar_t));
if (newbuf == NULL)
return 1;
if (oldbuf != NULL)
{
__wmemcpy (newbuf, oldbuf, _IO_wblen (fp));
- (*((_IO_strfile *) fp)->_s._free_buffer) (oldbuf);
+ free (oldbuf);
/* Make sure _IO_setb won't try to delete
_IO_buf_base. */
wd->_IO_buf_base = NULL;
@@ -228,59 +224,83 @@ enlarge_userbuf (_IO_FILE *fp, _IO_off64_t offset, int reading)
new position. */
assert (offset >= oldend);
if (reading)
- wmemset (wd->_IO_read_base + oldend, L'\0', offset - oldend);
+ __wmemset (wd->_IO_read_base + oldend, L'\0', offset - oldend);
else
- wmemset (wd->_IO_write_base + oldend, L'\0', offset - oldend);
+ __wmemset (wd->_IO_write_base + oldend, L'\0', offset - oldend);
return 0;
}
+static void
+_IO_wstr_switch_to_get_mode (FILE *fp)
+{
+ 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_read_end = fp->_wide_data->_IO_write_ptr;
-_IO_off64_t
-_IO_wstr_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
+ fp->_flags &= ~_IO_CURRENTLY_PUTTING;
+}
+
+off64_t
+_IO_wstr_seekoff (FILE *fp, off64_t offset, int dir, int mode)
{
- _IO_off64_t new_pos;
+ off64_t new_pos;
if (mode == 0 && (fp->_flags & _IO_TIED_PUT_GET))
mode = (fp->_flags & _IO_CURRENTLY_PUTTING ? _IOS_OUTPUT : _IOS_INPUT);
+ bool was_writing = (fp->_wide_data->_IO_write_ptr >
+ fp->_wide_data->_IO_write_base
+ || _IO_in_put_mode (fp));
+ if (was_writing)
+ _IO_wstr_switch_to_get_mode (fp);
+
if (mode == 0)
{
- /* Don't move any pointers. But there is no clear indication what
- mode FP is in. Let's guess. */
- if (fp->_IO_file_flags & _IO_NO_WRITES)
- new_pos = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_base;
- else
- new_pos = (fp->_wide_data->_IO_write_ptr
- - fp->_wide_data->_IO_write_base);
+ new_pos = (fp->_wide_data->_IO_write_ptr
+ - fp->_wide_data->_IO_write_base);
}
else
{
- _IO_ssize_t cur_size = _IO_wstr_count (fp);
+ ssize_t cur_size = _IO_wstr_count (fp);
new_pos = EOF;
/* Move the get pointer, if requested. */
if (mode & _IOS_INPUT)
{
+ ssize_t base;
switch (dir)
{
- case _IO_seek_end:
- offset += cur_size;
+ case _IO_seek_set:
+ base = 0;
break;
case _IO_seek_cur:
- offset += (fp->_wide_data->_IO_read_ptr
- - fp->_wide_data->_IO_read_base);
+ base = (fp->_wide_data->_IO_read_ptr
+ - fp->_wide_data->_IO_read_base);
break;
- default: /* case _IO_seek_set: */
+ default: /* case _IO_seek_end: */
+ base = cur_size;
break;
}
- if (offset < 0)
- return EOF;
- if ((_IO_ssize_t) offset > cur_size
- && enlarge_userbuf (fp, offset, 1) != 0)
+ ssize_t maxval = SSIZE_MAX/sizeof (wchar_t) - base;
+ if (offset < -base || offset > maxval)
+ {
+ __set_errno (EINVAL);
+ return EOF;
+ }
+ base += offset;
+ if (base > cur_size
+ && enlarge_userbuf (fp, base, 1) != 0)
return EOF;
fp->_wide_data->_IO_read_ptr = (fp->_wide_data->_IO_read_base
- + offset);
+ + base);
fp->_wide_data->_IO_read_end = (fp->_wide_data->_IO_read_base
+ cur_size);
new_pos = offset;
@@ -289,33 +309,40 @@ _IO_wstr_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
/* Move the put pointer, if requested. */
if (mode & _IOS_OUTPUT)
{
+ ssize_t base;
switch (dir)
{
- case _IO_seek_end:
- offset += cur_size;
+ case _IO_seek_set:
+ base = 0;
break;
case _IO_seek_cur:
- offset += (fp->_wide_data->_IO_write_ptr
- - fp->_wide_data->_IO_write_base);
+ base = (fp->_wide_data->_IO_write_ptr
+ - fp->_wide_data->_IO_write_base);
break;
- default: /* case _IO_seek_set: */
+ default: /* case _IO_seek_end: */
+ base = cur_size;
break;
}
- if (offset < 0)
- return EOF;
- if ((_IO_ssize_t) offset > cur_size
- && enlarge_userbuf (fp, offset, 0) != 0)
+ ssize_t maxval = SSIZE_MAX/sizeof (wchar_t) - base;
+ if (offset < -base || offset > maxval)
+ {
+ __set_errno (EINVAL);
+ return EOF;
+ }
+ base += offset;
+ if (base > cur_size
+ && enlarge_userbuf (fp, base, 0) != 0)
return EOF;
fp->_wide_data->_IO_write_ptr = (fp->_wide_data->_IO_write_base
- + offset);
- new_pos = offset;
+ + base);
+ new_pos = base;
}
}
return new_pos;
}
-_IO_wint_t
-_IO_wstr_pbackfail (_IO_FILE *fp, _IO_wint_t c)
+wint_t
+_IO_wstr_pbackfail (FILE *fp, wint_t c)
{
if ((fp->_flags & _IO_NO_WRITES) && c != WEOF)
return WEOF;
@@ -323,16 +350,16 @@ _IO_wstr_pbackfail (_IO_FILE *fp, _IO_wint_t c)
}
void
-_IO_wstr_finish (_IO_FILE *fp, int dummy)
+_IO_wstr_finish (FILE *fp, int dummy)
{
if (fp->_wide_data->_IO_buf_base && !(fp->_flags2 & _IO_FLAGS2_USER_WBUF))
- (((_IO_strfile *) fp)->_s._free_buffer) (fp->_wide_data->_IO_buf_base);
+ free (fp->_wide_data->_IO_buf_base);
fp->_wide_data->_IO_buf_base = NULL;
_IO_wdefault_finish (fp, 0);
}
-const struct _IO_jump_t _IO_wstr_jumps =
+const struct _IO_jump_t _IO_wstr_jumps libio_vtable =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, _IO_wstr_finish),