FreeCalypso > hg > sms-coding-utils

annotate libcoding/hexdigits.c @ 28:6e925aa54727

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libcoding: more sensible naming of GSM time encoding and decoding modules
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 13 Jun 2024 02:32:11 +0000
parents cd2d82ec5144
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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7
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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2 * This module contains elementary functions for working with hex digits.
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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3 */
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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4
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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5 decode_hex_digit(c)
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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6 {
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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7 if (c >= '0' && c <= '9')
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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8 return(c - '0');
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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9 if (c >= 'A' && c <= 'F')
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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10 return(c - 'A' + 10);
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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11 if (c >= 'a' && c <= 'f')
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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12 return(c - 'a' + 10);
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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13 return(-1);
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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14 }
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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15
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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16 encode_hex_digit(d)
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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17 unsigned d;
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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18 {
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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19 if (d <= 9)
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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20 return(d + '0');
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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21 else
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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22 return(d - 10 + 'A');
cd2d82ec5144 libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
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23 }