FreeCalypso > hg > freecalypso-tools
view uptools/libcoding/gsmtime.c @ 965:2969032bdfac
fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing
The only 100% safe way to pass a NULL pointer as a function argument
in K&R C is to cast 0 to a pointer type; failing to do so may cause
mysterious bugs (invalid stack frames or garbage in argument registers)
on 64-bit machines. This issue has already been fixed in most of
FC host tools, but I just found some missed spots: passing of NULL UDH
to PDU encoding functions in fcup-smsend[mult] in the case of single
(not concatenated) SMS.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 01 Sep 2023 07:33:51 +0000 |
parents | f40530e2d48d |
children |
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line source
/* * 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]); }