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/*
* Copyright (C) 2007-2010 Michael Buesch <mb@bu3sch.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "util.h"
#include "razer_private.h"
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
void razer_free(void *ptr, size_t size)
{
if (ptr) {
memset(ptr, 0, size);
free(ptr);
}
}
char * razer_strsplit(char *str, char sep)
{
char c;
if (!str)
return NULL;
for (c = *str; c != '\0' && c != sep; c = *str)
str++;
if (c == sep) {
*str = '\0';
return str + 1;
}
return NULL;
}
int razer_split_pair(const char *str, char sep, char *a, char *b, size_t len)
{
char *tmp;
if (strlen(str) >= len)
return -EINVAL;
strcpy(a, str);
tmp = razer_strsplit(a, sep);
if (!tmp)
return -EINVAL;
strcpy(b, tmp);
return 0;
}
int razer_string_to_int(const char *string, int *i)
{
char *tailptr;
long retval;
retval = strtol(string, &tailptr, 0);
if (tailptr == string || tailptr[0] != '\0')
return -EINVAL;
*i = retval;
return 0;
}
int razer_string_to_bool(const char *string, bool *b)
{
int i;
if (strcasecmp(string, "yes") == 0 ||
strcasecmp(string, "true") == 0 ||
strcasecmp(string, "on") == 0) {
*b = 1;
return 0;
}
if (strcasecmp(string, "no") == 0 ||
strcasecmp(string, "false") == 0 ||
strcasecmp(string, "off") == 0) {
*b = 0;
return 0;
}
if (!razer_string_to_int(string, &i)) {
*b = !!i;
return 0;
}
return -EINVAL;
}
char * razer_string_strip(char *str)
{
char *start = str;
size_t len;
if (!str)
return NULL;
while (*start != '\0' && isspace(*start))
start++;
len = strlen(start);
while (len && isspace(start[len - 1])) {
start[len - 1] = '\0';
len--;
}
return start;
}
void razer_timeval_add_msec(struct timeval *tv, unsigned int msec)
{
unsigned int seconds, usec;
seconds = msec / 1000;
msec = msec % 1000;
usec = msec * 1000;
tv->tv_usec += usec;
while (tv->tv_usec >= 1000000) {
tv->tv_sec++;
tv->tv_usec -= 1000000;
}
tv->tv_sec += seconds;
}
/* Returns true, if a is after b. */
bool razer_timeval_after(const struct timeval *a, const struct timeval *b)
{
if (a->tv_sec > b->tv_sec)
return 1;
if ((a->tv_sec == b->tv_sec) && (a->tv_usec > b->tv_usec))
return 1;
return 0;
}
/* Return a-b in milliseconds */
int razer_timeval_msec_diff(const struct timeval *a, const struct timeval *b)
{
int64_t usec_a, usec_b, usec_diff;
usec_a = (int64_t)a->tv_sec * 1000000;
usec_a += (int64_t)a->tv_usec;
usec_b = (int64_t)b->tv_sec * 1000000;
usec_b += (int64_t)b->tv_usec;
usec_diff = usec_a - usec_b;
return usec_diff / 1000;
}
void razer_msleep(unsigned int msecs)
{
int err;
struct timespec time;
time.tv_sec = 0;
while (msecs >= 1000) {
time.tv_sec++;
msecs -= 1000;
}
time.tv_nsec = msecs;
time.tv_nsec *= 1000000;
do {
err = nanosleep(&time, &time);
} while (err && errno == EINTR);
if (err) {
razer_error("nanosleep() failed with: %s\n",
strerror(errno));
}
}
le16_t razer_xor16_checksum(const void *_buffer, size_t size)
{
const uint8_t *buffer = _buffer;
uint16_t sum = 0;
size_t i;
for (i = 0; i < size; i += 2) {
sum ^= buffer[i];
if (i < size - 1)
sum ^= ((uint16_t)(buffer[i + 1])) << 8;
}
return cpu_to_le16(sum);
}
uint8_t razer_xor8_checksum(const void *_buffer, size_t size)
{
const uint8_t *buffer = _buffer;
uint8_t sum = 0;
size_t i;
for (i = 0; i < size; i++)
sum ^= buffer[i];
return sum;
}
void razer_dump(const char *prefix, const void *_buf, size_t size)
{
const unsigned char *buf = _buf;
size_t i;
for (i = 0; i < size; i++) {
if (i % 16 == 0) {
if (i != 0)
printf("\n");
printf("%s-[%04X]: ", prefix, (unsigned int)i);
}
printf("%02X%s", buf[i], (i % 2) ? " " : "");
}
printf("\n\n");
}
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