vendor/NetBSD/bmake/20200902

1 files changed, 100 insertions, 0 deletions

diff --git a/enum.c b/enum.c
new file mode 100755
index 0000000000000..9dec4f3a5f6ac
--- /dev/null
+++ b/enum.c
@@ -0,0 +1,100 @@
+/*	$NetBSD: enum.c,v 1.6 2020/09/01 20:34:51 rillig Exp $	*/
+
+/*
+ Copyright (c) 2020 Roland Illig <rillig@NetBSD.org>
+ 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+ */
+
+#ifndef MAKE_NATIVE
+static char rcsid[] = "$NetBSD: enum.c,v 1.6 2020/09/01 20:34:51 rillig Exp $";
+#else
+#include <sys/cdefs.h>
+#ifndef lint
+__RCSID("$NetBSD: enum.c,v 1.6 2020/09/01 20:34:51 rillig Exp $");
+#endif
+#endif
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "enum.h"
+
+/* Convert a bitset into a string representation, showing the names of the
+ * individual bits.
+ *
+ * Optionally, shortcuts for groups of bits can be added.  To have an effect,
+ * they need to be listed before their individual bits. */
+const char *
+Enum_FlagsToString(char *buf, size_t buf_size,
+		   int value, const EnumToStringSpec *spec)
+{
+	const char *buf_start = buf;
+	const char *sep = "";
+	size_t sep_len = 0;
+
+	for (; spec->es_value != 0; spec++) {
+		size_t name_len;
+
+		if ((value & spec->es_value) != spec->es_value)
+			    continue;
+		value &= ~spec->es_value;
+
+		assert(buf_size >= sep_len + 1);
+		memcpy(buf, sep, sep_len);
+		buf += sep_len;
+		buf_size -= sep_len;
+
+		name_len = strlen(spec->es_name);
+		assert(buf_size >= name_len + 1);
+		memcpy(buf, spec->es_name, name_len);
+		buf += name_len;
+		buf_size -= name_len;
+
+		sep = ENUM__SEP;
+		sep_len = sizeof ENUM__SEP - 1;
+	}
+
+	/* If this assertion fails, the listed enum values are incomplete. */
+	assert(value == 0);
+
+	if (buf == buf_start)
+		return "none";
+
+	assert(buf_size >= 1);
+	buf[0] = '\0';
+	return buf_start;
+}
+
+/* Convert a fixed-value enum into a string representation. */
+const char *
+Enum_ValueToString(int value, const EnumToStringSpec *spec)
+{
+	for (; spec->es_name[0] != '\0'; spec++) {
+	    if (value == spec->es_value)
+	        return spec->es_name;
+	}
+	abort(/* unknown enum value */);
+}