Mercurial > hg > cdb

annotate uint32_unpack.c @ 16:70f4df5a7283

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add cdb_write, log basic mmap outcomes
author Henry S. Thompson <ht@inf.ed.ac.uk>
date Thu, 27 Feb 2025 18:26:29 +0000
parents 2cb46628feec
children
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2cb46628feec from cdb-0.75 per http://cr.yp.to/cdb.html,
Henry S. Thompson <ht@inf.ed.ac.uk>
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1 #include "uint32.h"
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2
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3 void uint32_unpack(char s[4],uint32 *u)
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4 {
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5 uint32 result;
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6
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7 result = (unsigned char) s[3];
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8 result <<= 8;
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9 result += (unsigned char) s[2];
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10 result <<= 8;
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11 result += (unsigned char) s[1];
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12 result <<= 8;
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13 result += (unsigned char) s[0];
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14
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15 *u = result;
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16 }
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17
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18 void uint32_unpack_big(char s[4],uint32 *u)
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19 {
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20 uint32 result;
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21
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22 result = (unsigned char) s[0];
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23 result <<= 8;
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24 result += (unsigned char) s[1];
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25 result <<= 8;
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26 result += (unsigned char) s[2];
2cb46628feec from cdb-0.75 per http://cr.yp.to/cdb.html,
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parents:
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27 result <<= 8;
2cb46628feec from cdb-0.75 per http://cr.yp.to/cdb.html,
Henry S. Thompson <ht@inf.ed.ac.uk>
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28 result += (unsigned char) s[3];
2cb46628feec from cdb-0.75 per http://cr.yp.to/cdb.html,
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29
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30 *u = result;
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31 }