+
−/*
+
− * This library module implements decoding of GSM timestamps.
+
− */
+
−
+
−#include <sys/types.h>
+
−#include <stdio.h>
+
−
+
−gsm_timestamp_decode(inbuf, outbuf)
+
−	u_char *inbuf;
+
−	char *outbuf;
+
−{
+
−	u_char rev[7];
+
−	int i, d1, d2, tzsign;
+
−
+
−	for (i = 0; i < 7; i++) {
+
−		d1 = inbuf[i] & 0xF;
+
−		d2 = inbuf[i] >> 4;
+
−		rev[i] = (d1 << 4) | d2;
+
−	}
+
−	if (rev[6] & 0x80) {
+
−		rev[6] &= 0x7F;
+
−		tzsign = '-';
+
−	} else
+
−		tzsign = '+';
+
−	sprintf(outbuf, "%02X/%02X/%02X,%02X:%02X:%02X%c%02X", rev[0], rev[1],
+
−		rev[2], rev[3], rev[4], rev[5], tzsign, rev[6]);
+
−}