sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 89 insertions, 0 deletions

diff --git a/device/lib/c16stombs.c b/device/lib/c16stombs.c
new file mode 100644
index 0000000..e971f51
--- /dev/null
+++ b/device/lib/c16stombs.c
@@ -0,0 +1,89 @@
+/*-------------------------------------------------------------------------
+   c16stombs.c - convert a wide character string to a multibyte string
+
+   Copyright (C) 2018, Philipp Klaus Krause, krauseph@informatik.uni-freiburg.de
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option) any
+   later version.
+
+   This 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License 
+   along with this library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+
+#include <uchar.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <wchar.h>
+
+#ifndef __STDC_UTF_16__
+#error Encoding for char16_t strings must be UTF-16
+#endif
+#ifndef __STDC_ISO_10646__
+#error Encoding for wchar_t strings must be UCS-4
+#endif
+
+// This implementation assumes that wctomb() does not keep internal state.
+size_t __c16stombs(char *restrict s, const char16_t *restrict c16s, size_t n)
+{
+	size_t m = 0;
+	char b[MB_LEN_MAX];
+
+	for(;;)
+	{
+		int l;
+		wchar_t codepoint;
+
+		if(c16s[0] < 0xd800 || c16s[0] >= 0xe000) // Basic multilingual plane
+		{
+			codepoint = c16s[0];
+			c16s++;
+		}
+                else if(c16s[0] > 0xdbff || c16s[1] < 0xdc00 || c16s[1] > 0xdfff) // Unpaired surrogate
+			return(-1);
+		else
+		{
+			codepoint = ((unsigned long)(c16s[0]) << 10) -(0xd800ul << 10) + (unsigned long)(c16s[1]) - 0xdc00ul + 0x10000ul;
+			c16s += 2;
+		}
+
+		if(!codepoint)
+		{
+			if(m < n)
+				*s = 0;
+			break;
+		}
+
+		l = wctomb(b, codepoint);
+
+		if(l < 0)
+			return(-1);
+
+		if(m + l > n)
+			break;
+
+		memcpy(s, b, l);
+		s += l;
+		m += l;
+	}
+
+	return(m);
+}
+