1 /** @File 2 Routines for translating between host and network byte-order. 3 4 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials are licensed and made available 6 under the terms and conditions of the BSD License that accompanies this 7 distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 #include <Library/BaseLib.h> 15 #include <LibConfig.h> 16 #include <sys/endian.h> 17 18 // Undefine macro versions of the functions to be defined below. 19 #undef htonl 20 #undef htons 21 #undef ntohl 22 #undef ntohs 23 24 /** 32-bit Host to Network byte order conversion. 25 26 @param[in] Datum The 32-bit value to be converted. 27 @return Datum, converted to network byte order. 28 **/ 29 uint32_t htonl(IN uint32_t Datum)30htonl( 31 IN uint32_t Datum 32 ) 33 { 34 #if BYTE_ORDER == LITTLE_ENDIAN 35 return SwapBytes32(Datum); 36 #else 37 return Datum; 38 #endif 39 } 40 41 /** 16-bit Host to Network byte order conversion. 42 43 @param[in] Datum The 16-bit value to be converted. 44 @return Datum, converted to network byte order. 45 **/ 46 uint16_t htons(IN uint16_t Datum)47htons( 48 IN uint16_t Datum 49 ) 50 { 51 #if BYTE_ORDER == LITTLE_ENDIAN 52 return SwapBytes16(Datum); 53 #else 54 return Datum; 55 #endif 56 } 57 58 /** 32-bit Network to Host byte order conversion. 59 60 @param[in] Datum The 16-bit value to be converted. 61 @return Datum, converted to host byte order. 62 **/ 63 uint32_t ntohl(IN uint32_t Datum)64ntohl( 65 IN uint32_t Datum 66 ) 67 { 68 #if BYTE_ORDER == LITTLE_ENDIAN 69 return SwapBytes32(Datum); 70 #else 71 return Datum; 72 #endif 73 } 74 75 /** 16-bit Network to Host byte order conversion. 76 77 @param[in] Datum The 16-bit value to be converted. 78 @return Datum, converted to host byte order. 79 **/ 80 uint16_t ntohs(IN uint16_t Datum)81ntohs( 82 IN uint16_t Datum 83 ) 84 { 85 #if BYTE_ORDER == LITTLE_ENDIAN 86 return SwapBytes16(Datum); 87 #else 88 return Datum; 89 #endif 90 } 91