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SMS: export gsm411_bcdify() and gsm411_unbcdify() functions 

The same functions are e.g. required by the NITZ code in 04.08, and we
don't want copy+paste.
This commit is contained in:
Harald Welte 2011-12-01 21:08:19 +01:00
parent 62cb457632
commit ad633b0919
2 changed files with 26 additions and 20 deletions
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6
include/osmocom/gsm/gsm0411_utils.h
View File

@ -1,6 +1,12 @@
#ifndef _GSM0411_UTILS_H
#define _GSM0411_UTILS_H
/* Turn int into semi-octet representation: 98 => 0x89 */
uint8_t gsm411_bcdify(uint8_t value);
/* Turn semi-octet representation into int: 0x89 => 98 */
uint8_t gsm411_unbcdify(uint8_t value);
struct msgb *gsm411_msgb_alloc(void);
/* Generate 03.40 TP-SCTS */

40
src/gsm/gsm0411_utils.c
View File

@ -44,7 +44,7 @@ struct msgb *gsm411_msgb_alloc(void)
}
/* Turn int into semi-octet representation: 98 => 0x89 */
static uint8_t bcdify(uint8_t value)
uint8_t gsm411_bcdify(uint8_t value)
{
uint8_t ret;
@ -55,13 +55,13 @@ static uint8_t bcdify(uint8_t value)
}
/* Turn semi-octet representation into int: 0x89 => 98 */
static uint8_t unbcdify(uint8_t value)
uint8_t gsm411_unbcdify(uint8_t value)
{
uint8_t ret;
if ((value & 0x0F) > 9 || (value >> 4) > 9)
LOGP(DLSMS, LOGL_ERROR,
"unbcdify got too big nibble: 0x%02X\n", value);
"gsm411_unbcdify got too big nibble: 0x%02X\n", value);
ret = (value&0x0F)*10;
ret += value>>4;
@ -74,20 +74,20 @@ void gsm340_gen_scts(uint8_t *scts, time_t time)
{
struct tm *tm = gmtime(&time);
*scts++ = bcdify(tm->tm_year % 100);
*scts++ = bcdify(tm->tm_mon + 1);
*scts++ = bcdify(tm->tm_mday);
*scts++ = bcdify(tm->tm_hour);
*scts++ = bcdify(tm->tm_min);
*scts++ = bcdify(tm->tm_sec);
*scts++ = bcdify(0); /* GMT */
*scts++ = gsm411_bcdify(tm->tm_year % 100);
*scts++ = gsm411_bcdify(tm->tm_mon + 1);
*scts++ = gsm411_bcdify(tm->tm_mday);
*scts++ = gsm411_bcdify(tm->tm_hour);
*scts++ = gsm411_bcdify(tm->tm_min);
*scts++ = gsm411_bcdify(tm->tm_sec);
*scts++ = gsm411_bcdify(0); /* GMT */
}
/* Decode 03.40 TP-SCTS (into utc/gmt timestamp) */
time_t gsm340_scts(uint8_t *scts)
{
struct tm tm;
uint8_t yr = unbcdify(*scts++);
uint8_t yr = gsm411_unbcdify(*scts++);
int ofs;
memset(&tm, 0x00, sizeof(struct tm));
@ -96,15 +96,15 @@ time_t gsm340_scts(uint8_t *scts)
tm.tm_year = 100 + yr;
else
tm.tm_year = yr;
tm.tm_mon = unbcdify(*scts++) - 1;
tm.tm_mday = unbcdify(*scts++);
tm.tm_hour = unbcdify(*scts++);
tm.tm_min = unbcdify(*scts++);
tm.tm_sec = unbcdify(*scts++);
tm.tm_mon = gsm411_unbcdify(*scts++) - 1;
tm.tm_mday = gsm411_unbcdify(*scts++);
tm.tm_hour = gsm411_unbcdify(*scts++);
tm.tm_min = gsm411_unbcdify(*scts++);
tm.tm_sec = gsm411_unbcdify(*scts++);
/* according to gsm 03.40 time zone is
"expressed in quarters of an hour" */
ofs = unbcdify(*scts++) * 15*60;
ofs = gsm411_unbcdify(*scts++) * 15*60;
return mktime(&tm) - ofs;
}
@ -172,9 +172,9 @@ static unsigned long gsm340_vp_relative_integer(uint8_t *sms_vp)
static unsigned long gsm340_vp_relative_semioctet(uint8_t *sms_vp)
{
unsigned long minutes;
minutes = unbcdify(*sms_vp++)*60; /* hours */
minutes += unbcdify(*sms_vp++); /* minutes */
minutes += unbcdify(*sms_vp++)/60; /* seconds */
minutes = gsm411_unbcdify(*sms_vp++)*60; /* hours */
minutes += gsm411_unbcdify(*sms_vp++); /* minutes */
minutes += gsm411_unbcdify(*sms_vp++)/60; /* seconds */
return minutes;
}