42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
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* This file is part of the Minecraft Overviewer.
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*
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* Minecraft Overviewer is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or (at
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* your option) any later version.
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*
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* Minecraft Overviewer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the Overviewer. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* simple routines for dealing with endian conversion */
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#include <stdint.h>
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#define UNKNOWN_ENDIAN 0
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#define BIG_ENDIAN 1
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#define LITTLE_ENDIAN 2
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static int32_t endianness = UNKNOWN_ENDIAN;
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void init_endian(void) {
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/* figure out what our endianness is! */
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int16_t word = 0x0001;
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uint8_t* byte = (uint8_t*)(&word);
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endianness = byte[0] ? LITTLE_ENDIAN : BIG_ENDIAN;
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}
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uint16_t big_endian_ushort(uint16_t in) {
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return (endianness == LITTLE_ENDIAN) ? ((in >> 8) | (in << 8)) : in;
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}
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uint32_t big_endian_uint(uint32_t in) {
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return (endianness == LITTLE_ENDIAN) ? (((in & 0x000000FF) << 24) + ((in & 0x0000FF00) << 8) + ((in & 0x00FF0000) >> 8) + ((in & 0xFF000000) >> 24)) : in;
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}
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