FreeCalypso > hg > freecalypso-tools
view uptools/libcoding/gsm7_pack.c @ 797:ef501e258036
doc/opt-freecalypso-tree: add sim-data and sim-scripts
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 19 Mar 2021 06:17:58 +0000 |
parents | 15120d15cab5 |
children |
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/* * This library module implements the function for packing septets into octets. */ #include <sys/types.h> gsm7_pack(inbuf, outbuf, noctets) u_char *inbuf, *outbuf; unsigned noctets; { u_char *ip = inbuf, *op = outbuf; unsigned n, c; for (n = 0; n < noctets; n++) { c = n % 7; *op++ = ((ip[1] << 7) | ip[0]) >> c; if (c == 6) ip += 2; else ip += 1; } }