new files

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2621 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/parse_units.c

@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 1997 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * 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. 
+ *
+ * 3. All advertising materials mentioning features or use of this software 
+ *    must display the following acknowledgement: 
+ *      This product includes software developed by Kungliga Tekniska 
+ *      H<>gskolan and its contributors. 
+ *
+ * 4. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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. 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id$");
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <roken.h>
+#include "parse_units.h"
+
+/*
+ * Parse string in `s' according to `units' and return value.
+ * def_unit defines the default unit.
+ */
+
+int
+parse_units (const char *s, const struct units *units,
+	     const char *def_unit)
+{
+    const char *p;
+    int res = 0;
+    int val;
+    unsigned def_mult = 1;
+
+    if (def_unit != NULL) {
+	const struct units *u;
+
+	for (u = units; u->name; ++u) {
+	    if (strcasecmp (u->name, def_unit) == 0) {
+		def_mult = u->mult;
+		break;
+	    }
+	}
+	if (u->name == NULL)
+	    return -1;
+    }
+
+    p = s;
+    while (*p) {
+	double val;
+	char *next;
+	const struct units *u, *partial_unit;
+	size_t u_len;
+	unsigned partial;
+
+	val = strtod (p, &next); /* strtol(p, &next, 0); */
+	if (val == 0 && p == next)
+	    return -1;
+	p = next;
+	while (isspace(*p))
+	    ++p;
+	if (*p == '\0') {
+	    res += val * def_mult;
+	    break;
+	}
+	u_len = strcspn (p, "0123456789 \t");
+	partial = NULL;
+	partial = 0;
+	if (u_len > 1 && p[u_len - 1] == 's')
+	    --u_len;
+	for (u = units; u->name; ++u) {
+	    if (strncasecmp (p, u->name, u_len) == 0) {
+		if (u_len == strlen (u->name)) {
+		    p += u_len;
+		    res += val * u->mult;
+		    break;
+		} else {
+		    ++partial;
+		    partial_unit = u;
+		}
+	    }
+	}
+	if (u->name == NULL)
+	    if (partial == 1) {
+		p += u_len;
+		res += val * partial_unit->mult;
+	    } else {
+		return -1;
+	    }
+	if (*p == 's')
+	    ++p;
+    }
+    return res;
+}
+
+/*
+ * Return a string representation according to `units' of `num' in `s'
+ * with maximum length `len'.
+ */
+
+size_t
+unparse_units (int num, const struct units *units, char *s, size_t len)
+{
+    const struct units *u;
+    size_t ret = 0, tmp;
+
+    if (num == 0)
+	return snprintf (s, len, "%u", 0);
+
+    for (u = units; num > 0 && u->name; ++u) {
+	int div;
+
+	div = num / u->mult;
+	if (div) {
+	    num %= u->mult;
+	    tmp = snprintf (s, len, "%u %s%s%s", div, u->name,
+			    div == 1 ? "" : "s",
+			    num > 0 ? " " : "");
+	    len -= tmp;
+	    s += tmp;
+	    ret += tmp;
+	}
+    }
+    return ret;
+}