FreeCalypso > hg > fc-sim-tools
comparison libutil/hexdigits.c @ 8:34bbb0585cab
libutil: import from previous fc-pcsc-tools version
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 Mar 2021 05:42:37 +0000 |
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7:b25d4dfe5798 | 8:34bbb0585cab |
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1 /* | |
2 * This module contains elementary functions for working with hex digits. | |
3 */ | |
4 | |
5 decode_hex_digit(c) | |
6 { | |
7 if (c >= '0' && c <= '9') | |
8 return(c - '0'); | |
9 if (c >= 'A' && c <= 'F') | |
10 return(c - 'A' + 10); | |
11 if (c >= 'a' && c <= 'f') | |
12 return(c - 'a' + 10); | |
13 return(-1); | |
14 } | |
15 | |
16 encode_hex_digit(d) | |
17 unsigned d; | |
18 { | |
19 if (d <= 9) | |
20 return(d + '0'); | |
21 else | |
22 return(d - 10 + 'A'); | |
23 } |