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annotate compat/endian.c @ 0:d541e748cfd8

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Initial revision
author Guido Berhoerster <guido+libpws@berhoerster.name>
date Tue, 10 Feb 2015 11:29:54 +0100
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1 /*
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2 * Copyright (C) 2015 Guido Berhoerster <guido+pws@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
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5 * a copy of this software and associated documentation files (the
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6 * "Software"), to deal in the Software without restriction, including
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7 * without limitation the rights to use, copy, modify, merge, publish,
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8 * distribute, sublicense, and/or sell copies of the Software, and to
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9 * permit persons to whom the Software is furnished to do so, subject to
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
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13 * in all copies or substantial portions of the Software.
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #include <arpa/inet.h>
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25
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26 #include "pws-compat.h"
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27 #include "endian.h"
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28
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29 uint16_t
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30 le16toh(uint16_t little16)
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31 {
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32 unsigned char *b = (unsigned char *)&little16;
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33
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34 return ((b[0] << 0) | (b[1] << 8));
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35 }
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36
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37 uint16_t
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38 htole16(uint16_t host16)
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39 {
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40 uint16_t little16;
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41 unsigned char *b = (unsigned char *)&little16;
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42
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43 b[0] = (unsigned char)(host16 >> 0);
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44 b[1] = (unsigned char)(host16 >> 8);
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45
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46 return (little16);
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47 }
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48
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49 uint32_t
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50 le32toh(uint32_t little32)
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51 {
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52 unsigned char *b = (unsigned char *)&little32;
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53
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54 return ((b[0] << 0) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24));
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55 }
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56
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57 uint32_t
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58 htole32(uint32_t host32)
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59 {
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60 uint32_t little32;
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61 unsigned char *b = (unsigned char *)&little32;
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62
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63 b[0] = (unsigned char)(host32 >> 0);
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64 b[1] = (unsigned char)(host32 >> 8);
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65 b[2] = (unsigned char)(host32 >> 16);
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66 b[3] = (unsigned char)(host32 >> 24);
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67
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68 return (little32);
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69 }
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70
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71 uint16_t
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72 be16toh(uint16_t big16)
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73 {
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74 return (ntohs(big16));
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75 }
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76
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77 uint16_t
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78 htobe16(uint16_t host16)
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79 {
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80 return (htons(host16));
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81 }
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82
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83 uint32_t
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84 be32toh(uint32_t big32)
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85 {
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86 return (ntohl(big32));
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87 }
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88
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89 uint32_t
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90 htobe32(uint32_t host32)
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91 {
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92 return (htonl(host32));
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93 }