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/*
* Copyright (c) 2006 "David Kirchner" <dpk@dpk.net>. 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "support.h"
const char *
lookup_value(struct name_table *table, uintmax_t val)
{
for (; table->str != NULL; table++)
if (table->val == val)
return (table->str);
return (NULL);
}
/*
* Used when the value maps to a bitmask of #definition values in the
* table. This is a helper routine which outputs a symbolic mask of
* matched masks. Multiple masks are separated by a pipe ('|').
* The value is modified on return to only hold unmatched bits.
*/
void
print_mask_part(FILE *fp, struct name_table *table, uintmax_t *valp,
bool *printed)
{
uintmax_t rem;
rem = *valp;
for (; table->str != NULL; table++) {
if ((table->val & rem) == table->val) {
/*
* Only print a zero mask if the raw value is
* zero.
*/
if (table->val == 0 && *valp != 0)
continue;
fprintf(fp, "%s%s", *printed ? "|" : "", table->str);
*printed = true;
rem &= ~table->val;
}
}
*valp = rem;
}
/*
* Used when the value maps to a bitmask of #definition values in the
* table. The return value is true if something was printed. If
* rem is not NULL, *rem holds any bits not decoded if something was
* printed. If nothing was printed and rem is not NULL, *rem holds
* the original value.
*/
bool
print_mask_int(FILE *fp, struct name_table *table, int ival, int *rem)
{
uintmax_t val;
bool printed;
printed = false;
val = (unsigned)ival;
print_mask_part(fp, table, &val, &printed);
if (rem != NULL)
*rem = val;
return (printed);
}
/*
* Used for a mask of optional flags where a value of 0 is valid.
*/
bool
print_mask_0(FILE *fp, struct name_table *table, int val, int *rem)
{
if (val == 0) {
fputs("0", fp);
if (rem != NULL)
*rem = 0;
return (true);
}
return (print_mask_int(fp, table, val, rem));
}
/*
* Like print_mask_0 but for a unsigned long instead of an int.
*/
bool
print_mask_0ul(FILE *fp, struct name_table *table, u_long lval, u_long *rem)
{
uintmax_t val;
bool printed;
if (lval == 0) {
fputs("0", fp);
if (rem != NULL)
*rem = 0;
return (true);
}
printed = false;
val = lval;
print_mask_part(fp, table, &val, &printed);
if (rem != NULL)
*rem = val;
return (printed);
}
void
print_integer(FILE *fp, int val, int base)
{
switch (base) {
case 8:
fprintf(fp, "0%o", val);
break;
case 10:
fprintf(fp, "%d", val);
break;
case 16:
fprintf(fp, "0x%x", val);
break;
default:
abort2("bad base", 0, NULL);
break;
}
}
bool
print_value(FILE *fp, struct name_table *table, uintmax_t val)
{
const char *str;
str = lookup_value(table, val);
if (str != NULL) {
fputs(str, fp);
return (true);
}
return (false);
}
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