Add ncurses 6.4

third_party/ncurses/getenv_num.c

@@ -0,0 +1,76 @@
+/****************************************************************************
+ * Copyright 2018,2020 Thomas E. Dickey                                     *
+ * Copyright 1998-2012,2013 Free Software Foundation, Inc.                  *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
+ ****************************************************************************/
+
+/*
+ *	getenv_num.c -- obtain a number from the environment
+ */
+
+#include "curses.priv.h"
+
+MODULE_ID("$Id: getenv_num.c,v 1.8 2020/02/02 23:34:34 tom Exp $")
+
+NCURSES_EXPORT(int)
+_nc_getenv_num(const char *name)
+{
+    char *dst = 0;
+    char *src = getenv(name);
+    long value;
+
+    if ((src == 0)
+	|| (value = strtol(src, &dst, 0)) < 0
+	|| (dst == src)
+	|| (*dst != '\0')
+	|| (int) value < value)
+	value = -1;
+
+    return (int) value;
+}
+
+NCURSES_EXPORT(void)
+_nc_setenv_num(const char *name, int value)
+{
+    if (name != 0 && value >= 0) {
+	char buffer[128];
+#if HAVE_SETENV
+	_nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%d", value);
+	setenv(name, buffer, 1);
+#elif HAVE_PUTENV
+	char *s;
+	_nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%s=%d", name, value);
+	if ((s = strdup(buffer)) != 0)
+	    putenv(s);
+#else
+#error expected setenv/putenv functions
+#endif
+    }
+}