| 1 | /* |
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| 2 | * libcucul Canvas for ultrafast compositing of Unicode letters |
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| 3 | * libcaca Colour ASCII-Art library |
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| 4 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
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| 5 | * All Rights Reserved |
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| 6 | * |
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| 7 | * $Id: common.h 1303 2006-11-08 13:05:42Z sam $ |
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| 8 | * |
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| 9 | * This library is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the Do What The Fuck You Want To |
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| 11 | * 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 | #if defined(HAVE_INTTYPES_H) && !defined(__KERNEL__) |
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| 21 | # include <inttypes.h> |
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| 22 | #else |
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| 23 | typedef signed char int8_t; |
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| 24 | typedef signed short int16_t; |
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| 25 | typedef signed long int int32_t; |
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| 26 | |
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| 27 | typedef unsigned char uint8_t; |
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| 28 | typedef unsigned short uint16_t; |
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| 29 | typedef unsigned long int uint32_t; |
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| 30 | |
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| 31 | typedef long int intptr_t; |
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| 32 | typedef unsigned long int uintptr_t; |
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| 33 | #endif |
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| 34 | |
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| 35 | #if defined(HAVE_HTONS) |
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| 36 | # if defined(HAVE_ARPA_INET_H) |
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| 37 | # include <arpa/inet.h> |
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| 38 | # elif defined(HAVE_NETINET_IN_H) |
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| 39 | # include <netinet/in.h> |
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| 40 | # endif |
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| 41 | # define hton16 htons |
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| 42 | # define hton32 htonl |
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| 43 | #else |
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| 44 | # if defined(HAVE_ENDIAN_H) |
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| 45 | # include <endian.h> |
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| 46 | # endif |
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| 47 | static inline uint16_t hton16(uint16_t x) |
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| 48 | { |
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| 49 | /* This is compile-time optimised with at least -O1 or -Os */ |
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| 50 | #if defined(HAVE_ENDIAN_H) |
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| 51 | if(__BYTE_ORDER == __BIG_ENDIAN) |
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| 52 | #else |
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| 53 | uint32_t const dummy = 0x12345678; |
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| 54 | if(*(uint8_t const *)&dummy == 0x12) |
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| 55 | #endif |
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| 56 | return x; |
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| 57 | else |
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| 58 | return (x >> 8) | (x << 8); |
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| 59 | } |
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| 60 | |
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| 61 | static inline uint32_t hton32(uint32_t x) |
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| 62 | { |
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| 63 | /* This is compile-time optimised with at least -O1 or -Os */ |
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| 64 | #if defined(HAVE_ENDIAN_H) |
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| 65 | if(__BYTE_ORDER == __BIG_ENDIAN) |
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| 66 | #else |
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| 67 | uint32_t const dummy = 0x12345678; |
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| 68 | if(*(uint8_t const *)&dummy == 0x12) |
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| 69 | #endif |
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| 70 | return x; |
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| 71 | else |
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| 72 | return (x >> 24) | ((x >> 8) & 0x0000ff00) |
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| 73 | | ((x << 8) & 0x00ff0000) | (x << 24); |
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| 74 | } |
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| 75 | #endif |
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| 76 | |
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| 77 | #if defined(__KERNEL__) |
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| 78 | #undef HAVE_ERRNO_H |
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| 79 | #endif |
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