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authorRoland McGrath <roland@gnu.org>1996-07-09 23:17:59 +0000
committerRoland McGrath <roland@gnu.org>1996-07-09 23:17:59 +0000
commit07a4742f9ec2b0587c0d488bb65da2a6faa50fed (patch)
tree2b10e82cad4053bcbe27447bc3d444f6d2aef5e7 /wcsmbs/wcsrtombs.c
parentTue Jul 9 09:37:55 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> (diff)
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* posix/glob.h (__glob_opendir_hook, __glob_readdir_hook,cvs/libc-960710
__glob_closedir_hook): Remove decls. * sysdeps/generic/machine-gmon.h: Declare mcount_internal. * sysdeps/unix/inet/syscalls.list: Define __ names with weak aliases for send and connect syscalls. * socket/sys/socket.h: New file, taken from non-sysdep parts of linux/sys/socket.h; break sysdeps parts out into socketbits.h. Declare __ names for send and connect. * sysdeps/generic/socketbits.h: New file. * sysdeps/unix/sysv/linux/socketbits.h: New file. * sysdeps/unix/sysv/linux/sys/socket.h: File removed. * sysdeps/generic/sys/socket.h: File removed. * sysdeps/mach/hurd/connect.c: Define __ name and weak alias. * sysdeps/mach/hurd/send.c: Likewise.
Diffstat (limited to 'wcsmbs/wcsrtombs.c')
-rw-r--r--wcsmbs/wcsrtombs.c95
1 files changed, 73 insertions, 22 deletions
diff --git a/wcsmbs/wcsrtombs.c b/wcsmbs/wcsrtombs.c
index 9f1000937b..99ca6acc5b 100644
--- a/wcsmbs/wcsrtombs.c
+++ b/wcsmbs/wcsrtombs.c
@@ -1,6 +1,6 @@
/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
-Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
@@ -25,6 +25,18 @@ Boston, MA 02111-1307, USA. */
#endif
+static const wchar_t encoding_mask[] =
+{
+ ~0x7ff, ~0xffff, ~0x1fffff, ~0x3ffffff
+};
+
+static const unsigned char encoding_byte[] =
+{
+ 0xc0, 0xe0, 0xf0, 0xf8, 0xfc
+};
+
+/* We don't need the state really because we don't have shift states
+ to maintain between calls to this function. */
static mbstate_t internal;
size_t
@@ -34,40 +46,79 @@ wcsrtombs (dst, src, len, ps)
size_t len;
mbstate_t *ps;
{
- size_t result = 0;
+ size_t written = 0;
+ const wchar_t *run = *src;
if (ps == NULL)
ps = &internal;
- /*************************************************************\
- |* This is no complete implementation. While the multi-byte *|
- |* character handling is not finished this will do. *|
- \*************************************************************/
+ if (dst == NULL)
+ /* The LEN parameter has to be ignored if we don't actually write
+ anything. */
+ len = ~0;
- while (len > 0 && **src != L'\0')
+ while (written < len)
{
- if ((**src & ~0xff) != 0)
+ wchar_t wc = *run++;
+
+ if (wc < 0 || wc > 0x7fffffff)
{
+ /* This is no correct ISO 10646 character. */
errno = EILSEQ;
return (size_t) -1;
}
- if (dst != NULL)
- dst[result] = (char) **src;
- ++result;
- ++(*src);
- --len;
- }
-
- if (len > 0)
- {
- if (dst != NULL)
+ if (wc == L'\0')
+ {
+ /* Found the end. */
+ if (dst != NULL)
+ *dst = '\0';
+ *src = NULL;
+ return written;
+ }
+ else if (wc < 0x80)
{
- dst[result] = '\0';
- *ps = 0;
+ /* It's an one byte sequence. */
+ if (dst != NULL)
+ *dst++ = (char) wc;
+ ++written;
+ }
+ else
+ {
+ size_t step;
+
+ for (step = 2; step < 6; ++step)
+ if ((wc & encoding_mask[step - 2]) == 0)
+ break;
+
+ if (written + step >= len)
+ /* Too long. */
+ break;
+
+ if (dst != NULL)
+ {
+ size_t cnt = step;
+
+ dst[0] = encoding_byte[cnt - 2];
+
+ --cnt;
+ do
+ {
+ dst[cnt] = 0x80 | (wc & 0x3f);
+ wc >>= 6;
+ }
+ while (--cnt > 0);
+ dst[0] |= wc;
+
+ dst += step;
+ }
+
+ written += step;
}
- *src = NULL;
}
- return result;
+ /* Store position of first unprocessed word. */
+ *src = run;
+
+ return written;
}