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* Copyright 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* Compatibility file for Linux wireless for kernels 2.6.32.
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#include <linux/compat.h>
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#include <linux/netdevice.h>
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int __dev_addr_add(struct dev_addr_list **list, int *count,
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void *addr, int alen, int glbl)
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struct dev_addr_list *da;
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for (da = *list; da != NULL; da = da->next) {
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if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
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da->da_addrlen == alen) {
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int old_glbl = da->da_gusers;
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da = kzalloc(sizeof(*da), GFP_ATOMIC);
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memcpy(da->da_addr, addr, alen);
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da->da_addrlen = alen;
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da->da_gusers = glbl ? 1 : 0;
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int __dev_addr_delete(struct dev_addr_list **list, int *count,
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void *addr, int alen, int glbl)
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struct dev_addr_list *da;
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for (; (da = *list) != NULL; list = &da->next) {
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if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
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alen == da->da_addrlen) {
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int old_glbl = da->da_gusers;
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int __dev_addr_sync(struct dev_addr_list **to, int *to_count,
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struct dev_addr_list **from, int *from_count)
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struct dev_addr_list *da, *next;
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err = __dev_addr_add(to, to_count,
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da->da_addr, da->da_addrlen, 0);
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} else if (da->da_users == 1) {
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__dev_addr_delete(to, to_count,
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da->da_addr, da->da_addrlen, 0);
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__dev_addr_delete(from, from_count,
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da->da_addr, da->da_addrlen, 0);
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EXPORT_SYMBOL_GPL(__dev_addr_sync);
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void __dev_addr_unsync(struct dev_addr_list **to, int *to_count,
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struct dev_addr_list **from, int *from_count)
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struct dev_addr_list *da, *next;
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__dev_addr_delete(to, to_count,
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da->da_addr, da->da_addrlen, 0);
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__dev_addr_delete(from, from_count,
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da->da_addr, da->da_addrlen, 0);
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EXPORT_SYMBOL_GPL(__dev_addr_unsync);
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* Nonzero if YEAR is a leap year (every 4 years,
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* except every 100th isn't, and every 400th is).
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static int __isleap(long year)
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return (year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0);
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/* do a mathdiv for long type */
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static long math_div(long a, long b)
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return a / b - (a % b < 0);
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/* How many leap years between y1 and y2, y1 must less or equal to y2 */
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static long leaps_between(long y1, long y2)
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long leaps1 = math_div(y1 - 1, 4) - math_div(y1 - 1, 100)
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+ math_div(y1 - 1, 400);
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long leaps2 = math_div(y2 - 1, 4) - math_div(y2 - 1, 100)
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+ math_div(y2 - 1, 400);
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return leaps2 - leaps1;
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/* How many days come before each month (0-12). */
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static const unsigned short __mon_yday[2][13] = {
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{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
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{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
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#define SECS_PER_HOUR (60 * 60)
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#define SECS_PER_DAY (SECS_PER_HOUR * 24)
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* time_to_tm - converts the calendar time to local broken-down time
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* @totalsecs the number of seconds elapsed since 00:00:00 on January 1, 1970,
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* Coordinated Universal Time (UTC).
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* @offset offset seconds adding to totalsecs.
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* @result pointer to struct tm variable to receive broken-down time
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void time_to_tm(time_t totalsecs, int offset, struct tm *result)
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const unsigned short *ip;
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days = totalsecs / SECS_PER_DAY;
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rem = totalsecs % SECS_PER_DAY;
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while (rem >= SECS_PER_DAY) {
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result->tm_hour = rem / SECS_PER_HOUR;
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rem %= SECS_PER_HOUR;
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result->tm_min = rem / 60;
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result->tm_sec = rem % 60;
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/* January 1, 1970 was a Thursday. */
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result->tm_wday = (4 + days) % 7;
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if (result->tm_wday < 0)
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result->tm_wday += 7;
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while (days < 0 || days >= (__isleap(y) ? 366 : 365)) {
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/* Guess a corrected year, assuming 365 days per year. */
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long yg = y + math_div(days, 365);
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/* Adjust DAYS and Y to match the guessed year. */
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days -= (yg - y) * 365 + leaps_between(y, yg);
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result->tm_year = y - 1900;
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result->tm_yday = days;
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ip = __mon_yday[__isleap(y)];
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for (y = 11; days < ip[y]; y--)
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result->tm_mday = days + 1;
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EXPORT_SYMBOL(time_to_tm);
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/* source: kernel/time/timeconv.c*/