FreeCalypso > hg > sms-coding-utils
view libcoding/check_high_bit.c @ 13:b8d8f8a3cdb7
scripts: wrappers for network-side SMS-DELIVER PDU generation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 27 Aug 2023 05:11:21 +0000 |
parents | 0fe95ca922c7 |
children |
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/* * The function implemented in this module is intended for validating inputs * that are expected to be in the form of GSM7 characters carried in an octet * string, where the high bit of every octet is expected to be cleared. */ #include <sys/types.h> check_high_bit(buf, len) u_char *buf; unsigned len; { unsigned n; for (n = 0; n < len; n++) { if (buf[n] & 0x80) return(-1); } return(0); }