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-rw-r--r--source4/heimdal/lib/roken/parse_units.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/source4/heimdal/lib/roken/parse_units.c b/source4/heimdal/lib/roken/parse_units.c
new file mode 100644
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+++ b/source4/heimdal/lib/roken/parse_units.c
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+/*
+ * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
+ * (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. 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: parse_units.c,v 1.18 2005/04/12 11:28:59 lha Exp $");
+#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.
+ */
+
+static int
+parse_something (const char *s, const struct units *units,
+ const char *def_unit,
+ int (*func)(int res, int val, unsigned mult),
+ int init,
+ int accept_no_val_p)
+{
+ const char *p;
+ int res = init;
+ 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;
+ int no_val_p = 0;
+
+ while(isspace((unsigned char)*p) || *p == ',')
+ ++p;
+
+ val = strtod (p, &next); /* strtol(p, &next, 0); */
+ if (p == next) {
+ val = 0;
+ if(!accept_no_val_p)
+ return -1;
+ no_val_p = 1;
+ }
+ p = next;
+ while (isspace((unsigned char)*p))
+ ++p;
+ if (*p == '\0') {
+ res = (*func)(res, val, def_mult);
+ if (res < 0)
+ return res;
+ break;
+ } else if (*p == '+') {
+ ++p;
+ val = 1;
+ } else if (*p == '-') {
+ ++p;
+ val = -1;
+ }
+ if (no_val_p && val == 0)
+ val = 1;
+ u_len = strcspn (p, ", \t");
+ partial = 0;
+ partial_unit = NULL;
+ 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 = (*func)(res, val, u->mult);
+ if (res < 0)
+ return res;
+ break;
+ } else {
+ ++partial;
+ partial_unit = u;
+ }
+ }
+ }
+ if (u->name == NULL) {
+ if (partial == 1) {
+ p += u_len;
+ res = (*func)(res, val, partial_unit->mult);
+ if (res < 0)
+ return res;
+ } else {
+ return -1;
+ }
+ }
+ if (*p == 's')
+ ++p;
+ }
+ return res;
+}
+
+/*
+ * The string consists of a sequence of `n unit'
+ */
+
+static int
+acc_units(int res, int val, unsigned mult)
+{
+ return res + val * mult;
+}
+
+int ROKEN_LIB_FUNCTION
+parse_units (const char *s, const struct units *units,
+ const char *def_unit)
+{
+ return parse_something (s, units, def_unit, acc_units, 0, 0);
+}
+
+/*
+ * The string consists of a sequence of `[+-]flag'. `orig' consists
+ * the original set of flags, those are then modified and returned as
+ * the function value.
+ */
+
+static int
+acc_flags(int res, int val, unsigned mult)
+{
+ if(val == 1)
+ return res | mult;
+ else if(val == -1)
+ return res & ~mult;
+ else if (val == 0)
+ return mult;
+ else
+ return -1;
+}
+
+int ROKEN_LIB_FUNCTION
+parse_flags (const char *s, const struct units *units,
+ int orig)
+{
+ return parse_something (s, units, NULL, acc_flags, orig, 1);
+}
+
+/*
+ * Return a string representation according to `units' of `num' in `s'
+ * with maximum length `len'. The actual length is the function value.
+ */
+
+static int
+unparse_something (int num, const struct units *units, char *s, size_t len,
+ int (*print) (char *, size_t, int, const char *, int),
+ int (*update) (int, unsigned),
+ const char *zero_string)
+{
+ const struct units *u;
+ int ret = 0, tmp;
+
+ if (num == 0)
+ return snprintf (s, len, "%s", zero_string);
+
+ for (u = units; num > 0 && u->name; ++u) {
+ int divisor;
+
+ divisor = num / u->mult;
+ if (divisor) {
+ num = (*update) (num, u->mult);
+ tmp = (*print) (s, len, divisor, u->name, num);
+ if (tmp < 0)
+ return tmp;
+ if (tmp > len) {
+ len = 0;
+ s = NULL;
+ } else {
+ len -= tmp;
+ s += tmp;
+ }
+ ret += tmp;
+ }
+ }
+ return ret;
+}
+
+static int
+print_unit (char *s, size_t len, int divisor, const char *name, int rem)
+{
+ return snprintf (s, len, "%u %s%s%s",
+ divisor, name,
+ divisor == 1 ? "" : "s",
+ rem > 0 ? " " : "");
+}
+
+static int
+update_unit (int in, unsigned mult)
+{
+ return in % mult;
+}
+
+static int
+update_unit_approx (int in, unsigned mult)
+{
+ if (in / mult > 0)
+ return 0;
+ else
+ return update_unit (in, mult);
+}
+
+int ROKEN_LIB_FUNCTION
+unparse_units (int num, const struct units *units, char *s, size_t len)
+{
+ return unparse_something (num, units, s, len,
+ print_unit,
+ update_unit,
+ "0");
+}
+
+int ROKEN_LIB_FUNCTION
+unparse_units_approx (int num, const struct units *units, char *s, size_t len)
+{
+ return unparse_something (num, units, s, len,
+ print_unit,
+ update_unit_approx,
+ "0");
+}
+
+void ROKEN_LIB_FUNCTION
+print_units_table (const struct units *units, FILE *f)
+{
+ const struct units *u, *u2;
+ unsigned max_sz = 0;
+
+ for (u = units; u->name; ++u) {
+ max_sz = max(max_sz, strlen(u->name));
+ }
+
+ for (u = units; u->name;) {
+ char buf[1024];
+ const struct units *next;
+
+ for (next = u + 1; next->name && next->mult == u->mult; ++next)
+ ;
+
+ if (next->name) {
+ for (u2 = next;
+ u2->name && u->mult % u2->mult != 0;
+ ++u2)
+ ;
+ if (u2->name == NULL)
+ --u2;
+ unparse_units (u->mult, u2, buf, sizeof(buf));
+ fprintf (f, "1 %*s = %s\n", max_sz, u->name, buf);
+ } else {
+ fprintf (f, "1 %s\n", u->name);
+ }
+ u = next;
+ }
+}
+
+static int
+print_flag (char *s, size_t len, int divisor, const char *name, int rem)
+{
+ return snprintf (s, len, "%s%s", name, rem > 0 ? ", " : "");
+}
+
+static int
+update_flag (int in, unsigned mult)
+{
+ return in - mult;
+}
+
+int ROKEN_LIB_FUNCTION
+unparse_flags (int num, const struct units *units, char *s, size_t len)
+{
+ return unparse_something (num, units, s, len,
+ print_flag,
+ update_flag,
+ "");
+}
+
+void ROKEN_LIB_FUNCTION
+print_flags_table (const struct units *units, FILE *f)
+{
+ const struct units *u;
+
+ for(u = units; u->name; ++u)
+ fprintf(f, "%s%s", u->name, (u+1)->name ? ", " : "\n");
+}
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