Adding upstream version 0.5.1

islang.c

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2000, NBG01720@nifty.ne.jp
+ *
+ * To compile this program:
+ *      gcc -Zomf -Zcrtdll -O2 -Wall -s islang.c
+ */
+#define INCL_DOSNLS
+#include <os2.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+int
+main(int argc, char **argv)
+{
+    if (argc <= 1)
+	return 1;
+
+    if (isdigit((int)*argv[1])) {
+	ULONG CpList[8], CpSize;
+	APIRET rc = DosQueryCp(sizeof(CpList), CpList, &CpSize);
+	if (rc)
+	    return rc;
+	while (--argc > 0)
+	    if (*CpList == atoi(argv[argc]))
+		return 0;
+    }
+    else {
+	char *lang = getenv("LANG");
+	if (!lang || !*lang) {
+	    lang = getenv("LANGUAGE");
+	    if (!lang || !*lang)
+		return 1;
+	}
+	if (!strnicmp(lang, argv[1], 2))
+	    return 0;
+    }
+    return 1;
+}