Add wcstof(3) and wcstold(3).

ok miod@

1 files changed, 128 insertions, 0 deletions

diff --git a/lib/libc/locale/_wcstod.h b/lib/libc/locale/_wcstod.h
new file mode 100644
index 00000000000..70aa40d239d
--- /dev/null
+++ b/lib/libc/locale/_wcstod.h
@@ -0,0 +1,128 @@
+/*	$OpenBSD: _wcstod.h,v 1.1 2009/01/13 18:18:31 kettenis Exp $	*/
+/* $NetBSD: wcstod.c,v 1.4 2001/10/28 12:08:43 yamt Exp $ */
+
+/*-
+ * Copyright (c)1999, 2000, 2001 Citrus Project,
+ * 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.
+ *
+ *	$Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstod.c,v 1.2 2001/09/27 16:23:57 yamt Exp $
+ */
+
+/*
+ * function template for wcstof, wcstod and wcstold.
+ *
+ * parameters:
+ *	FUNCNAME : function name
+ *      float_type : return type
+ *      STRTOD_FUNC : conversion function
+ */
+
+float_type
+FUNCNAME(const wchar_t *nptr, wchar_t **endptr)
+{
+	const wchar_t *src;
+	size_t size;
+	const wchar_t *start;
+
+	/*
+	 * check length of string and call strtod
+	 */
+	src = nptr;
+
+	/* skip space first */
+	while (iswspace(*src)) {
+		src++;
+	}
+
+	/* get length of string */
+	start = src;
+	if (*src && wcschr(L"+-", *src))
+		src++;
+	size = wcsspn(src, L"0123456789");
+	src += size;
+	if (*src == L'.') {/* XXX use localeconv */
+		src++;
+		size = wcsspn(src, L"0123456789");
+		src += size;
+	}
+	if (*src && wcschr(L"Ee", *src)) {
+		src++;
+		if (*src && wcschr(L"+-", *src))
+			src++;
+		size = wcsspn(src, L"0123456789");
+		src += size;
+	}
+	size = src - start;
+
+	/*
+	 * convert to a char-string and pass it to strtod.
+	 *
+	 * since all mb chars used to represent a double-constant
+	 * are in the portable character set, we can assume
+	 * that they are 1-byte chars.
+	 */
+	if (size)
+	{
+		mbstate_t st;
+		char *buf;
+		char *end;
+		const wchar_t *s;
+		size_t size_converted;
+		float_type result;
+		
+		buf = malloc(size + 1);
+		if (!buf) {
+			/* error */
+			errno = ENOMEM; /* XXX */
+			return 0;
+		}
+			
+		s = start;
+		memset(&st, 0, sizeof(st));
+		size_converted = wcsrtombs(buf, &s, size, &st);
+		if (size != size_converted) {
+			/* XXX should not happen */
+			free(buf);
+			errno = EILSEQ;
+			return 0;
+		}
+
+		buf[size] = 0;
+		result = STRTOD_FUNC(buf, &end);
+
+		free(buf);
+
+		if (endptr)
+			/* LINTED bad interface */
+			*endptr = (wchar_t*)start + (end - buf);
+
+		return result;
+	}
+
+	if (endptr)
+		/* LINTED bad interface */
+		*endptr = (wchar_t*)start;
+
+	return 0;
+}