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annotate mercurial/bitmanipulation.h @ 45796:e9555305c5c6
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Differential Revision: https://phab.mercurial-scm.org/D9262
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Thu, 29 Oct 2020 09:03:08 -0700 |
parents | 1fb2510cf8c8 |
children | eed42f1c22d6 |
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1 #ifndef _HG_BITMANIPULATION_H_ |
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2 #define _HG_BITMANIPULATION_H_ |
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3 |
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4 #include <string.h> |
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5 |
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6 #include "compat.h" |
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7 |
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8 static inline uint32_t getbe32(const char *c) |
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9 { |
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10 const unsigned char *d = (const unsigned char *)c; |
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11 |
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12 return ((((uint32_t)d[0]) << 24) | (((uint32_t)d[1]) << 16) | |
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13 (((uint32_t)d[2]) << 8) | (d[3])); |
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14 } |
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15 |
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16 static inline int16_t getbeint16(const char *c) |
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17 { |
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18 const unsigned char *d = (const unsigned char *)c; |
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19 |
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20 return ((d[0] << 8) | (d[1])); |
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21 } |
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22 |
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23 static inline uint16_t getbeuint16(const char *c) |
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24 { |
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25 const unsigned char *d = (const unsigned char *)c; |
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26 |
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27 return ((d[0] << 8) | (d[1])); |
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28 } |
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29 |
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30 static inline void putbe32(uint32_t x, char *c) |
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31 { |
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32 c[0] = (x >> 24) & 0xff; |
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33 c[1] = (x >> 16) & 0xff; |
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34 c[2] = (x >> 8) & 0xff; |
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35 c[3] = (x)&0xff; |
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36 } |
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37 |
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38 static inline double getbefloat64(const char *c) |
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39 { |
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40 const unsigned char *d = (const unsigned char *)c; |
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41 double ret; |
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42 int i; |
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43 uint64_t t = 0; |
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44 for (i = 0; i < 8; i++) { |
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45 t = (t << 8) + d[i]; |
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46 } |
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47 memcpy(&ret, &t, sizeof(t)); |
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48 return ret; |
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49 } |
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50 |
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51 #endif |