Libc-498.tar.gz

[apple/libc.git] / stdio / fgetws-fbsd.c

diff --git a/stdio/fgetws-fbsd.c b/stdio/fgetws-fbsd.c
new file mode 100644 (file)
index 0000000..bd64c2b
--- /dev/null
+++ b/stdio/fgetws-fbsd.c
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 2002-2004 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.6 2004/10/03 15:48:32 stefanf Exp $");
+
+#include "xlocale_private.h"
+
+#include "namespace.h"
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+#include "local.h"
+#include "mblocal.h"
+
+wchar_t *
+fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t loc)
+{
+       wchar_t *wsp;
+       size_t nconv;
+       const char *src;
+       unsigned char *nl;
+       struct __xlocale_st_runelocale *rl;
+       size_t (*__mbsnrtowcs)(wchar_t * __restrict, const char ** __restrict, size_t, size_t, __darwin_mbstate_t * __restrict, locale_t);
+
+       NORMALIZE_LOCALE(loc);
+       rl = loc->__lc_ctype;
+       __mbsnrtowcs = rl->__mbsnrtowcs;
+       FLOCKFILE(fp);
+       ORIENT(fp, 1);
+
+       if (n <= 0) {
+               errno = EINVAL;
+               goto error;
+       }
+
+       if (fp->_r <= 0 && __srefill(fp))
+               /* EOF */
+               goto error;
+       wsp = ws;
+       do {
+               src = (const char *)fp->_p;
+               nl = memchr(fp->_p, '\n', fp->_r);
+               nconv = __mbsnrtowcs(wsp, &src,
+                   nl != NULL ? (nl - fp->_p + 1) : fp->_r,
+                   n - 1, &fp->_extra->mbstate, loc);
+               if (nconv == (size_t)-1)
+                       /* Conversion error */
+                       goto error;
+               if (src == NULL) {
+                       /*
+                        * We hit a null byte. Increment the character count,
+                        * since mbsnrtowcs()'s return value doesn't include
+                        * the terminating null, then resume conversion
+                        * after the null.
+                        */
+                       nconv++;
+                       src = memchr(fp->_p, '\0', fp->_r);
+                       src++;
+               }
+               fp->_r -= (unsigned char *)src - fp->_p;
+               fp->_p = (unsigned char *)src;
+               n -= nconv;
+               wsp += nconv;
+       } while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 ||
+           __srefill(fp) == 0));
+       if (wsp == ws)
+               /* EOF */
+               goto error;
+       if (!rl->__mbsinit(&fp->_extra->mbstate, loc))
+               /* Incomplete character */
+               goto error;
+       *wsp++ = L'\0';
+       FUNLOCKFILE(fp);
+
+       return (ws);
+
+error:
+       FUNLOCKFILE(fp);
+       return (NULL);
+}
+
+wchar_t *
+fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
+{
+       return fgetws_l(ws, n, fp, __current_locale());
+}