| 1 | /* |
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| 2 | * libpipi Proper image processing implementation library |
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| 3 | * Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org> |
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| 4 | * All Rights Reserved |
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| 5 | * |
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| 6 | * $Id$ |
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| 7 | * |
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| 8 | * This library is free software. It comes without any warranty, to |
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| 9 | * the extent permitted by applicable law. You can redistribute it |
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| 10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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| 11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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| 12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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| 13 | */ |
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| 14 | |
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| 15 | /* |
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| 16 | * This file contains replacements for commonly found object types and |
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| 17 | * function prototypes that are sometimes missing. |
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| 18 | */ |
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| 19 | |
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| 20 | /* C99 types */ |
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| 21 | #if defined HAVE_INTTYPES_H && !defined __KERNEL__ |
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| 22 | # include <inttypes.h> |
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| 23 | #else |
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| 24 | typedef signed char int8_t; |
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| 25 | typedef signed short int16_t; |
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| 26 | typedef signed long int int32_t; |
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| 27 | |
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| 28 | typedef unsigned char uint8_t; |
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| 29 | typedef unsigned short uint16_t; |
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| 30 | typedef unsigned long int uint32_t; |
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| 31 | |
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| 32 | typedef long int intptr_t; |
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| 33 | typedef unsigned long int uintptr_t; |
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| 34 | #endif |
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| 35 | |
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| 36 | /* hton16() and hton32() */ |
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| 37 | #if defined HAVE_HTONS |
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| 38 | # if defined __KERNEL__ |
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| 39 | /* Nothing to do */ |
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| 40 | # elif defined HAVE_ARPA_INET_H |
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| 41 | # include <arpa/inet.h> |
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| 42 | # elif defined HAVE_NETINET_IN_H |
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| 43 | # include <netinet/in.h> |
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| 44 | # endif |
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| 45 | # define hton16 htons |
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| 46 | # define hton32 htonl |
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| 47 | #else |
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| 48 | # if defined HAVE_ENDIAN_H |
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| 49 | # include <endian.h> |
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| 50 | # endif |
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| 51 | static inline uint16_t hton16(uint16_t x) |
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| 52 | { |
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| 53 | /* This is compile-time optimised with at least -O1 or -Os */ |
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| 54 | #if defined HAVE_ENDIAN_H |
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| 55 | if(__BYTE_ORDER == __BIG_ENDIAN) |
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| 56 | #else |
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| 57 | uint32_t const dummy = 0x12345678; |
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| 58 | if(*(uint8_t const *)&dummy == 0x12) |
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| 59 | #endif |
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| 60 | return x; |
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| 61 | else |
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| 62 | return (x >> 8) | (x << 8); |
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| 63 | } |
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| 64 | |
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| 65 | static inline uint32_t hton32(uint32_t x) |
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| 66 | { |
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| 67 | /* This is compile-time optimised with at least -O1 or -Os */ |
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| 68 | #if defined HAVE_ENDIAN_H |
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| 69 | if(__BYTE_ORDER == __BIG_ENDIAN) |
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| 70 | #else |
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| 71 | uint32_t const dummy = 0x12345678; |
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| 72 | if(*(uint8_t const *)&dummy == 0x12) |
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| 73 | #endif |
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| 74 | return x; |
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| 75 | else |
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| 76 | return (x >> 24) | ((x >> 8) & 0x0000ff00) |
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| 77 | | ((x << 8) & 0x00ff0000) | (x << 24); |
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| 78 | } |
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| 79 | #endif |
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| 80 | |
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