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annotate mercurial/bitmanipulation.h @ 34661:eb586ed5d8ce
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author | Denis Laxalde <denis.laxalde@logilab.fr> |
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date | Thu, 12 Oct 2017 09:39:50 +0200 |
parents | b4356d1cf3e4 |
children | ce77b0563228 |
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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 ((d[0] << 24) | |
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13 (d[1] << 16) | |
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14 (d[2] << 8) | |
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15 (d[3])); |
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16 } |
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17 |
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18 static inline int16_t getbeint16(const char *c) |
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19 { |
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20 const unsigned char *d = (const unsigned char *)c; |
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21 |
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22 return ((d[0] << 8) | |
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23 (d[1])); |
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24 } |
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25 |
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26 static inline uint16_t getbeuint16(const char *c) |
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27 { |
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28 const unsigned char *d = (const unsigned char *)c; |
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29 |
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30 return ((d[0] << 8) | |
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31 (d[1])); |
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32 } |
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33 |
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34 static inline void putbe32(uint32_t x, char *c) |
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35 { |
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36 c[0] = (x >> 24) & 0xff; |
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37 c[1] = (x >> 16) & 0xff; |
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38 c[2] = (x >> 8) & 0xff; |
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39 c[3] = (x) & 0xff; |
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40 } |
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41 |
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42 static inline double getbefloat64(const char *c) |
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43 { |
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44 const unsigned char *d = (const unsigned char *)c; |
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45 double ret; |
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46 int i; |
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47 uint64_t t = 0; |
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48 for (i = 0; i < 8; i++) { |
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49 t = (t<<8) + d[i]; |
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50 } |
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51 memcpy(&ret, &t, sizeof(t)); |
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52 return ret; |
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53 } |
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54 |
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55 #endif |