FreeCalypso > hg > fc-sim-tools
view libutil/hexdigits.c @ 53:fbedb67d234f
serial: fix parity for inverse coding convention
Important note: it is my (Mother Mychaela's) understanding that
SIM cards with inverse coding convention are extremely rare,
and I have never seen such a card. Therefore, our support for
the inverse coding convention will likely remain forever untested.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 21 Mar 2021 20:46:09 +0000 |
parents | 34bbb0585cab |
children |
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/* * This module contains elementary functions for working with hex digits. */ decode_hex_digit(c) { if (c >= '0' && c <= '9') return(c - '0'); if (c >= 'A' && c <= 'F') return(c - 'A' + 10); if (c >= 'a' && c <= 'f') return(c - 'a' + 10); return(-1); } encode_hex_digit(d) unsigned d; { if (d <= 9) return(d + '0'); else return(d - 10 + 'A'); }