FreeCalypso > hg > sms-coding-utils
annotate libcoding/hexdigits.c @ 11:9ed03ed4e673
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author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 05 Aug 2023 08:44:32 +0000 |
parents | cd2d82ec5144 |
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cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /* |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
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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>
parents:
diff
changeset
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3 */ |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 decode_hex_digit(c) |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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6 { |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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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>
parents:
diff
changeset
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8 return(c - '0'); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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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>
parents:
diff
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10 return(c - 'A' + 10); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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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>
parents:
diff
changeset
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12 return(c - 'a' + 10); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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13 return(-1); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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14 } |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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15 |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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16 encode_hex_digit(d) |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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17 unsigned d; |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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18 { |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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19 if (d <= 9) |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 return(d + '0'); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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21 else |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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22 return(d - 10 + 'A'); |
cd2d82ec5144
libcoding/hexdigits.c: import from fc-sim-tools/libutil
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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23 } |