Tenari
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
#include "all.h"
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fn u64 writeU64ToBufferLE(u8* buffer, u64 value) {
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buffer[0] = (u8)(value & 0xFF);
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buffer[1] = (u8)((value >> 8) & 0xFF);
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buffer[2] = (u8)((value >> 16) & 0xFF);
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buffer[3] = (u8)((value >> 24) & 0xFF);
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buffer[4] = (u8)((value >> 32) & 0xFF);
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buffer[5] = (u8)((value >> 40) & 0xFF);
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buffer[6] = (u8)((value >> 48) & 0xFF);
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buffer[7] = (u8)((value >> 56) & 0xFF);
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return 8;// number of bytes written
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}
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fn u64 writeU32ToBufferLE(u8* buffer, u32 value) {
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buffer[0] = (u8)(value & 0xFF);
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buffer[1] = (u8)((value >> 8) & 0xFF);
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buffer[2] = (u8)((value >> 16) & 0xFF);
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buffer[3] = (u8)((value >> 24) & 0xFF);
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return 4;// number of bytes written
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}
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fn u64 writeI32ToBufferLE(u8* buffer, i32 value) {
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buffer[0] = (u8)(value & 0xFF);
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buffer[1] = (u8)((value >> 8) & 0xFF);
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buffer[2] = (u8)((value >> 16) & 0xFF);
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buffer[3] = (u8)((value >> 24) & 0xFF);
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return 4;// number of bytes written
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}
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fn u64 writeU16ToBufferLE(u8* buffer, u16 value) {
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buffer[0] = (u8)(value & 0xFF);
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buffer[1] = (u8)((value >> 8) & 0xFF);
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return 2;// number of bytes written
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}
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fn u64 writeF32ToBufferLE(u8* buffer, f32 value) {
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u32 bits;
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memcpy(&bits, &value, sizeof(u32)); // reinterpret float bits as integer
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buffer[0] = (u8)(bits & 0xFF);
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buffer[1] = (u8)((bits >> 8) & 0xFF);
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buffer[2] = (u8)((bits >> 16) & 0xFF);
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buffer[3] = (u8)((bits >> 24) & 0xFF);
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return 4;// number of bytes written
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}
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fn u64 readU64FromBufferLE(u8 *buffer) {
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return (u64)buffer[0] |
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((u64)buffer[1] << 8) |
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((u64)buffer[2] << 16) |
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((u64)buffer[3] << 24) |
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((u64)buffer[4] << 32) |
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((u64)buffer[5] << 40) |
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((u64)buffer[6] << 48) |
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((u64)buffer[7] << 56);
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}
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fn u32 readU32FromBufferLE(u8 *buffer) {
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return (u32)buffer[0] |
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((u32)buffer[1] << 8) |
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((u32)buffer[2] << 16) |
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((u32)buffer[3] << 24);
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}
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fn i32 readI32FromBufferLE(u8 *buffer) {
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return (i32)buffer[0] |
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((i32)buffer[1] << 8) |
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((i32)buffer[2] << 16) |
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((i32)buffer[3] << 24);
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}
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fn u16 readU16FromBufferLE(u8 *buffer) {
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return (u16)buffer[0] |
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((u16)buffer[1] << 8);
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}
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fn f32 readF32FromBufferLE(u8 *buf) {
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u32 bits = 0;
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bits |= (u32)(u8)buf[0] << 0;
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bits |= (u32)(u8)buf[1] << 8;
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bits |= (u32)(u8)buf[2] << 16;
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bits |= (u32)(u8)buf[3] << 24;
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f32 value;
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memcpy(&value, &bits, sizeof(f32));
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return value;
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}
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