src/endian/SDL_endian.c
changeset 0 74212992fb08
child 252 e8157fcb3114
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     1 /*
       
     2     SDL - Simple DirectMedia Layer
       
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
       
     4 
       
     5     This library is free software; you can redistribute it and/or
       
     6     modify it under the terms of the GNU Library General Public
       
     7     License as published by the Free Software Foundation; either
       
     8     version 2 of the License, or (at your option) any later version.
       
     9 
       
    10     This library is distributed in the hope that it will be useful,
       
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
       
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       
    13     Library General Public License for more details.
       
    14 
       
    15     You should have received a copy of the GNU Library General Public
       
    16     License along with this library; if not, write to the Free
       
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
       
    18 
       
    19     Sam Lantinga
       
    20     slouken@devolution.com
       
    21 */
       
    22 
       
    23 #ifdef SAVE_RCSID
       
    24 static char rcsid =
       
    25  "@(#) $Id$";
       
    26 #endif
       
    27 
       
    28 /* Functions for dynamically reading and writing endian-specific values */
       
    29 
       
    30 #include "SDL_endian.h"
       
    31 
       
    32 Uint16 SDL_ReadLE16 (SDL_RWops *src)
       
    33 {
       
    34 	Uint16 value;
       
    35 
       
    36 	SDL_RWread(src, &value, (sizeof value), 1);
       
    37 	return(SDL_SwapLE16(value));
       
    38 }
       
    39 Uint16 SDL_ReadBE16 (SDL_RWops *src)
       
    40 {
       
    41 	Uint16 value;
       
    42 
       
    43 	SDL_RWread(src, &value, (sizeof value), 1);
       
    44 	return(SDL_SwapBE16(value));
       
    45 }
       
    46 Uint32 SDL_ReadLE32 (SDL_RWops *src)
       
    47 {
       
    48 	Uint32 value;
       
    49 
       
    50 	SDL_RWread(src, &value, (sizeof value), 1);
       
    51 	return(SDL_SwapLE32(value));
       
    52 }
       
    53 Uint32 SDL_ReadBE32 (SDL_RWops *src)
       
    54 {
       
    55 	Uint32 value;
       
    56 
       
    57 	SDL_RWread(src, &value, (sizeof value), 1);
       
    58 	return(SDL_SwapBE32(value));
       
    59 }
       
    60 Uint64 SDL_ReadLE64 (SDL_RWops *src)
       
    61 {
       
    62 	Uint64 value;
       
    63 
       
    64 	SDL_RWread(src, &value, (sizeof value), 1);
       
    65 	return(SDL_SwapLE64(value));
       
    66 }
       
    67 Uint64 SDL_ReadBE64 (SDL_RWops *src)
       
    68 {
       
    69 	Uint64 value;
       
    70 
       
    71 	SDL_RWread(src, &value, (sizeof value), 1);
       
    72 	return(SDL_SwapBE64(value));
       
    73 }
       
    74 
       
    75 int SDL_WriteLE16 (SDL_RWops *dst, Uint16 value)
       
    76 {
       
    77 	value = SDL_SwapLE16(value);
       
    78 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
    79 }
       
    80 int SDL_WriteBE16 (SDL_RWops *dst, Uint16 value)
       
    81 {
       
    82 	value = SDL_SwapBE16(value);
       
    83 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
    84 }
       
    85 int SDL_WriteLE32 (SDL_RWops *dst, Uint32 value)
       
    86 {
       
    87 	value = SDL_SwapLE32(value);
       
    88 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
    89 }
       
    90 int SDL_WriteBE32 (SDL_RWops *dst, Uint32 value)
       
    91 {
       
    92 	value = SDL_SwapBE32(value);
       
    93 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
    94 }
       
    95 int SDL_WriteLE64 (SDL_RWops *dst, Uint64 value)
       
    96 {
       
    97 	value = SDL_SwapLE64(value);
       
    98 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
    99 }
       
   100 int SDL_WriteBE64 (SDL_RWops *dst, Uint64 value)
       
   101 {
       
   102 	value = SDL_SwapBE64(value);
       
   103 	return(SDL_RWwrite(dst, &value, (sizeof value), 1));
       
   104 }