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/*
** v_pack.c
**
** These functions are used to pack and unpack various quantities to/from network
** packet buffers. They do not care about alignment, operating at byte level internally.
** The external byte-ordering used is big-endian (aka "network byte order") for all
** quantities larger than a single byte.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "v_pack.h"
size_t vnp_raw_pack_uint8(void *buffer, uint8 data)
{
*(uint8 *) buffer = data;
return sizeof data;
}
size_t vnp_raw_unpack_uint8(const void *buffer, uint8 *data)
{
*data = *(uint8 *) buffer;
return sizeof *data;
}
size_t vnp_raw_pack_uint8_vector(void *buffer, const uint8 *data, unsigned int length)
{
memcpy(buffer, data, length);
return length;
}
size_t vnp_raw_unpack_uint8_vector(const void *buffer, uint8 *data, unsigned int length)
{
memcpy(data, buffer, length);
return length;
}
size_t vnp_raw_pack_uint16(void *buffer, uint16 data)
{
*(uint8 *) buffer = (data & 0xFF00) >> 8;
*((uint8 *) buffer + 1) = data & 0xFF;
return sizeof data;
}
size_t vnp_raw_unpack_uint16(const void *buffer, uint16 *data)
{
register const uint8 *b = buffer;
register uint16 tmp;
tmp = ((uint16) *b++) << 8;
tmp |= (uint16) *b;
*data = tmp;
return sizeof *data;
}
size_t vnp_raw_pack_uint16_vector(void *buffer, const uint16 *data, unsigned int length)
{
register uint8 *b = buffer;
unsigned int i;
for(i = 0; i < length; i++)
{
*b++ = (*data & 0xFF00) >> 8;
*b++ = *data & 0xFF;
data++;
}
return length * 2;
}
size_t vnp_raw_unpack_uint16_vector(const void *buffer, uint16 *data, unsigned int length)
{
register const uint8 *b = buffer;
uint16 *end;
for(end = data + length; end != data; data++)
{
*data = ((uint16) *b++) << 8;
*data |= (uint16) *b++;
}
return length * 2;
}
size_t vnp_raw_pack_uint24(void *buffer, uint32 data)
{
register uint8 *p = buffer;
data >>= 8;
*(p++) = (data >> 24) & 0xFF;
*(p++) = (data >> 16) & 0xFF;
*(p++) = (data >> 8) & 0xFF;
return 3;
}
size_t vnp_raw_unpack_uint24(const void *buffer, uint32 *data)
{
register const uint8 *p = buffer;
register uint32 tmp = 0;
tmp |= ((uint32) *p++) << 24;
tmp |= ((uint32) *p++) << 16;
tmp |= ((uint32) *p++) << 8;
tmp |= tmp >> 24;
return 3;
}
size_t vnp_raw_pack_uint24_vector(void *buffer, const uint32 *data, unsigned int length)
{
register uint8 *b = buffer;
unsigned int i;
for(i = 0; i < length; i++)
{
*b++ = (*data >> 24) & 0xFF;
*b++ = (*data >> 16) & 0xFF;
*b++ = (*data >> 8) & 0xFF;
data++;
}
return length * 3;
}
size_t vnp_raw_unpack_uint24_vector(const void *buffer, uint32 *data, unsigned int length)
{
register const uint8 *b = buffer;
register uint32 tmp;
uint32 *end;
for(end = data + length; end != data; data++)
{
tmp = ((uint32) *b++) << 24;
tmp |= ((uint32) *b++) << 16;
tmp |= ((uint32) *b++) << 8;
tmp |= tmp >> 24;
*data = tmp;
}
return length * 3;
}
size_t vnp_raw_pack_uint32(void *buffer, uint32 data)
{
register uint8 *b = buffer;
*b++ = (data >> 24) & 0xFF;
*b++ = (data >> 16) & 0xFF;
*b++ = (data >> 8) & 0xFF;
*b++ = data & 0xFF;
return sizeof data;
}
size_t vnp_raw_unpack_uint32(const void *buffer, uint32 *data)
{
register const uint8 *b = buffer;
*data = ((uint32) *b++) << 24;
*data |= ((uint32) *b++) << 16;
*data |= ((uint32) *b++) << 8;
*data |= *b;
return sizeof *data;
}
size_t vnp_raw_pack_uint32_vector(void *buffer, const uint32 *data, unsigned int length)
{
register uint8 *b = buffer;
unsigned int i;
for(i = 0; i < length; i++)
{
*b++ = (*data >> 24) & 0xFF;
*b++ = (*data >> 16) & 0xFF;
*b++ = (*data >> 8) & 0xFF;
*b++ = *data & 0xFF;
data++;
}
return length * 4;
}
size_t vnp_raw_unpack_uint32_vector(const void *buffer, uint32 *data, unsigned int length)
{
register const uint8 *b = buffer;
uint32 *end;
for(end = data + length; end != data; data++)
{
*data = ((uint32) *b++) << 24;
*data |= ((uint32) *b++) << 16;
*data |= ((uint32) *b++) << 8;
*data |= ((uint32) *b++);
}
return length * 4;
}
size_t vnp_raw_pack_real32(void *buffer, real32 data)
{
union { uint32 uint; real32 real; } punt;
punt.real = data;
return vnp_raw_pack_uint32(buffer, punt.uint);
}
size_t vnp_raw_unpack_real32(const void *buffer, real32 *data)
{
return vnp_raw_unpack_uint32(buffer, (uint32 *) data);
}
size_t vnp_raw_pack_real32_vector(void *buffer, const real32 *data, unsigned int length)
{
uint32 i;
for(i = 0; i < length; i++)
vnp_raw_pack_real32(&((uint8 *)buffer)[i * 4], data[i]);
return length * 4;
}
size_t vnp_raw_unpack_real32_vector(const void *buffer, real32 *data, unsigned int length)
{
uint32 i;
for(i = 0; i < length; i++)
vnp_raw_unpack_real32(&((uint8 *)buffer)[i * 4], &data[i]);
return length * 4;
}
size_t vnp_raw_pack_real64(void *buffer, real64 data)
{
union { uint32 uint[2]; real64 real; } punt;
uint32 size;
punt.real = data;
size = vnp_raw_pack_uint32(buffer, punt.uint[0]);
buffer = (uint8 *) buffer + size;
size += vnp_raw_pack_uint32(buffer, punt.uint[1]);
return size;
}
size_t vnp_raw_unpack_real64(const void *buffer, real64 *data)
{
union { uint32 uint[2]; real64 real; } punt;
uint32 size;
size = vnp_raw_unpack_uint32(buffer, &punt.uint[0]);
size += vnp_raw_unpack_uint32(((uint8 *)buffer) + size, &punt.uint[1]);
*data = punt.real;
return size;
}
size_t vnp_raw_pack_real64_vector(void *buffer, const real64 *data, unsigned int length)
{
uint32 i;
for(i = 0; i < length; i++)
vnp_raw_pack_real64(&((uint8 *)buffer)[i * 8], data[i]);
return length * 8;
}
size_t vnp_raw_unpack_real64_vector(const void *buffer, real64 *data, unsigned int length)
{
uint32 i;
for(i = 0; i < length; i++)
vnp_raw_unpack_real64(&((uint8 *)buffer)[i * 8], &data[i]);
return length * 8;
}
size_t vnp_raw_pack_string(void *buffer, const char *string, size_t max_size)
{
unsigned int i = 0;
char *p = buffer;
if(string != 0)
for(; i < max_size && string[i] != 0; i++)
p[i] = string[i];
p[i] = 0;
return ++i;
}
size_t vnp_raw_unpack_string(const void *buffer, char *string, size_t max_size, size_t max_size2)
{
unsigned int i;
const char *p = buffer;
max_size--;
max_size2--;
for(i = 0; i < max_size && i < max_size2 && p[i] != 0; i++)
string[i] = p[i];
string[i] = 0;
return ++i;
}
/* --------------------------------------------------------------------------------------------------- */
size_t vnp_pack_quat32(void *buffer, const VNQuat32 *data)
{
uint8 *out = buffer;
if(data == NULL)
return 0;
out += vnp_raw_pack_real32(out, data->x);
out += vnp_raw_pack_real32(out, data->y);
out += vnp_raw_pack_real32(out, data->z);
out += vnp_raw_pack_real32(out, data->w);
return out - (uint8 *) buffer;
}
size_t vnp_unpack_quat32(const void *buffer, VNQuat32 *data)
{
const uint8 *in = buffer;
if(data == NULL)
return 0;
in += vnp_raw_unpack_real32(in, &data->x);
in += vnp_raw_unpack_real32(in, &data->y);
in += vnp_raw_unpack_real32(in, &data->z);
in += vnp_raw_unpack_real32(in, &data->w);
return in - (uint8 *) buffer;
}
size_t vnp_pack_quat64(void *buffer, const VNQuat64 *data)
{
uint8 *out = buffer;
if(data == NULL)
return 0;
out += vnp_raw_pack_real64(out, data->x);
out += vnp_raw_pack_real64(out, data->y);
out += vnp_raw_pack_real64(out, data->z);
out += vnp_raw_pack_real64(out, data->w);
return out - (uint8 *) buffer;
}
size_t vnp_unpack_quat64(const void *buffer, VNQuat64 *data)
{
const uint8 *in = buffer;
if(data == NULL)
return 0;
in += vnp_raw_unpack_real64(in, &data->x);
in += vnp_raw_unpack_real64(in, &data->y);
in += vnp_raw_unpack_real64(in, &data->z);
in += vnp_raw_unpack_real64(in, &data->w);
return in - (uint8 *) buffer;
}
size_t vnp_pack_audio_block(void *buffer, VNABlockType type, const VNABlock *block)
{
if(block == NULL)
return 0;
switch(type)
{
case VN_A_BLOCK_INT8:
return vnp_raw_pack_uint8_vector(buffer, block->vint8, sizeof block->vint8 / sizeof *block->vint8);
case VN_A_BLOCK_INT16:
return vnp_raw_pack_uint16_vector(buffer, block->vint16, sizeof block->vint16 / sizeof *block->vint16);
case VN_A_BLOCK_INT24:
return vnp_raw_pack_uint24_vector(buffer, block->vint24, sizeof block->vint24 / sizeof *block->vint24);
case VN_A_BLOCK_INT32:
return vnp_raw_pack_uint32_vector(buffer, block->vint32, sizeof block->vint32 / sizeof *block->vint32);
case VN_A_BLOCK_REAL32:
return vnp_raw_pack_real32_vector(buffer, block->vreal32, sizeof block->vreal32 / sizeof *block->vreal32);
case VN_A_BLOCK_REAL64:
return vnp_raw_pack_real64_vector(buffer, block->vreal64, sizeof block->vreal64 / sizeof *block->vreal64);
}
return 0;
}
size_t vnp_unpack_audio_block(const void *buffer, VNABlockType type, VNABlock *block)
{
if(block == NULL)
return 0;
switch(type)
{
case VN_A_BLOCK_INT8:
return vnp_raw_unpack_uint8_vector(buffer, block->vint8, sizeof block->vint8 / sizeof *block->vint8);
case VN_A_BLOCK_INT16:
return vnp_raw_unpack_uint16_vector(buffer, block->vint16, sizeof block->vint16 / sizeof *block->vint16);
case VN_A_BLOCK_INT24:
return vnp_raw_unpack_uint24_vector(buffer, block->vint24, sizeof block->vint24 / sizeof *block->vint24);
case VN_A_BLOCK_INT32:
return vnp_raw_unpack_uint32_vector(buffer, block->vint32, sizeof block->vint32 / sizeof *block->vint32);
case VN_A_BLOCK_REAL32:
return vnp_raw_unpack_real32_vector(buffer, block->vreal32, sizeof block->vreal32 / sizeof *block->vreal32);
case VN_A_BLOCK_REAL64:
return vnp_raw_unpack_real64_vector(buffer, block->vreal64, sizeof block->vreal64 / sizeof *block->vreal64);
}
return 0;
}
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