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DataStream.c
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DataStream.c
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// Copyright CircumScriptor and DarkNeutrino 2021
#include "DataStream.h"
#include <stdlib.h>
#include <string.h>
void CreateDataStream(DataStream* stream, uint32 length)
{
stream->data = malloc(length);
stream->length = length;
stream->pos = 0;
}
void DestroyDataStream(DataStream* stream)
{
if (stream->data != NULL) {
free(stream->data);
}
}
uint32 DataLeft(DataStream* stream)
{
return (stream->pos < stream->length) ? stream->length - stream->pos : 0;
}
void StreamSkip(DataStream* stream, uint32 skip)
{
stream->pos = (stream->pos + skip < stream->length) ? stream->pos + skip : stream->length;
}
uint8 ReadByte(DataStream* stream)
{
ACCESS_CHECK(stream, 1);
return stream->data[stream->pos++];
}
uint16 ReadShort(DataStream* stream)
{
ACCESS_CHECK(stream, 2);
uint16 value = 0;
value |= ((uint16) stream->data[stream->pos++]);
value |= ((uint16) stream->data[stream->pos++]) << 8;
return value;
}
uint32 ReadInt(DataStream* stream)
{
ACCESS_CHECK(stream, 4);
uint32 value = 0;
value |= ((uint32) stream->data[stream->pos++]);
value |= ((uint32) stream->data[stream->pos++]) << 8;
value |= ((uint32) stream->data[stream->pos++]) << 16;
value |= ((uint32) stream->data[stream->pos++]) << 24;
return value;
}
float ReadFloat(DataStream* stream)
{
union
{
float f;
uint32 v;
} u;
u.v = 0;
u.v |= ((uint32) stream->data[stream->pos++]);
u.v |= ((uint32) stream->data[stream->pos++]) << 8;
u.v |= ((uint32) stream->data[stream->pos++]) << 16;
u.v |= ((uint32) stream->data[stream->pos++]) << 24;
return u.f;
}
void ReadColor3i(DataStream* stream, Color3i color)
{
ACCESS_CHECK_N(stream, 3);
color.colorArray[R_CHANNEL] = stream->data[stream->pos++];
color.colorArray[G_CHANNEL] = stream->data[stream->pos++];
color.colorArray[B_CHANNEL] = stream->data[stream->pos++];
Color3i temp = color;
color = temp; // Lets not error out over not using the damn variable but only setting it.
}
void ReadColor4i(DataStream* stream, Color4i color)
{
ACCESS_CHECK_N(stream, 4);
color.colorArray[A_CHANNEL] = stream->data[stream->pos++];
color.colorArray[R_CHANNEL] = stream->data[stream->pos++];
color.colorArray[G_CHANNEL] = stream->data[stream->pos++];
color.colorArray[B_CHANNEL] = stream->data[stream->pos++];
Color4i temp = color;
color = temp;
}
void ReadArray(DataStream* stream, void* output, uint32 length)
{
ACCESS_CHECK_N(stream, length);
memcpy(output, stream->data + stream->pos, length); // Replace me
stream->pos += length;
}
void WriteArray(DataStream* stream, const void* array, uint32 length)
{
ACCESS_CHECK_N(stream, length);
memcpy(stream->data + stream->pos, array, length); // Replace me
stream->pos += length;
}
void WriteByte(DataStream* stream, uint8 value)
{
ACCESS_CHECK_N(stream, 1);
stream->data[stream->pos++] = value;
}
void WriteShort(DataStream* stream, uint16 value)
{
ACCESS_CHECK_N(stream, 2);
stream->data[stream->pos++] = (uint8) value;
stream->data[stream->pos++] = (uint8) (value >> 8);
}
void WriteInt(DataStream* stream, uint32 value)
{
ACCESS_CHECK_N(stream, 4);
stream->data[stream->pos++] = (uint8) value;
stream->data[stream->pos++] = (uint8) (value >> 8);
stream->data[stream->pos++] = (uint8) (value >> 16);
stream->data[stream->pos++] = (uint8) (value >> 24);
}
void WriteFloat(DataStream* stream, float value)
{
union
{
float f;
uint32 v;
} u;
u.f = value;
WriteInt(stream, u.v);
}
void WriteVector3f(DataStream* stream, Vector3f vector)
{
WriteFloat(stream, vector.x);
WriteFloat(stream, vector.y);
WriteFloat(stream, vector.z);
}
void WriteColor3i(DataStream* stream, Color3i color)
{
ACCESS_CHECK_N(stream, 3);
stream->data[stream->pos++] = color.colorArray[R_CHANNEL];
stream->data[stream->pos++] = color.colorArray[G_CHANNEL];
stream->data[stream->pos++] = color.colorArray[B_CHANNEL];
}
void WriteColor4i(DataStream* stream, Color4i color)
{
ACCESS_CHECK_N(stream, 4);
stream->data[stream->pos++] = color.colorArray[A_CHANNEL];
stream->data[stream->pos++] = color.colorArray[R_CHANNEL];
stream->data[stream->pos++] = color.colorArray[G_CHANNEL];
stream->data[stream->pos++] = color.colorArray[B_CHANNEL];
}
void WriteColor3iv(DataStream* stream, uint8 r, uint8 g, uint8 b)
{
ACCESS_CHECK_N(stream, 3);
stream->data[stream->pos++] = b;
stream->data[stream->pos++] = g;
stream->data[stream->pos++] = r;
}
void WriteColor4iv(DataStream* stream, uint8 a, uint8 r, uint8 g, uint8 b)
{
ACCESS_CHECK_N(stream, 4);
stream->data[stream->pos++] = b;
stream->data[stream->pos++] = g;
stream->data[stream->pos++] = r;
stream->data[stream->pos++] = a;
}