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VILLASnode/lib/io/raw.c

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/** RAW IO format
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
#include "sample.h"
#include "plugin.h"
#include "utils.h"
#include "compat.h"
#include "io/raw.h"
/** Convert float to host byte order */
#define SWAP_FLT_TOH(o, n) ({ \
union { float f; uint32_t i; } x = { .f = n }; \
x.i = (o) ? be32toh(x.i) : le32toh(x.i); x.f; \
})
/** Convert double to host byte order */
#define SWAP_DBL_TOH(o, n) ({ \
union { float f; uint64_t i; } x = { .f = n }; \
x.i = (o) ? be64toh(x.i) : le64toh(x.i); x.f; \
})
/** Convert float to big/little endian byte order */
#define SWAP_FLT_TOE(o, n) ({ \
union { float f; uint32_t i; } x = { .f = n }; \
x.i = (o) ? htobe32(x.i) : htole32(x.i); x.f; \
})
/** Convert double to big/little endian byte order */
#define SWAP_DBL_TOE(o, n) ({ \
union { double f; uint64_t i; } x = { .f = n }; \
x.i = (o) ? htobe64(x.i) : htole64(x.i); x.f; \
})
/** Convert integer of varying width to host byte order */
#define SWAP_INT_TOH(o, b, n) (o ? be ## b ## toh(n) : le ## b ## toh(n))
/** Convert integer of varying width to big/little endian byte order */
#define SWAP_INT_TOE(o, b, n) (o ? htobe ## b (n) : htole ## b (n))
int raw_sprint(char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt, int flags)
{
int i, o = 0;
size_t nlen;
int8_t *i8 = (void *) buf;
int16_t *i16 = (void *) buf;
int32_t *i32 = (void *) buf;
int64_t *i64 = (void *) buf;
float *f32 = (void *) buf;
double *f64 = (void *) buf;
int bits = 1 << (flags >> 24);
for (i = 0; i < cnt; i++) {
nlen = (smps[i]->length + o + (flags & RAW_FAKE) ? 3 : 0) * (bits / 8);
if (nlen >= len)
break;
/* First three values are sequence, seconds and nano-seconds timestamps */
if (flags & RAW_FAKE) {
switch (bits) {
case 32:
i32[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 32, smps[i]->sequence);
i32[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 32, smps[i]->ts.origin.tv_sec);
i32[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 32, smps[i]->ts.origin.tv_nsec);
break;
case 64:
i64[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 64, smps[i]->sequence);
i64[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 64, smps[i]->ts.origin.tv_sec);
i64[o++] = SWAP_INT_TOE(flags & RAW_BE_HDR, 64, smps[i]->ts.origin.tv_nsec);
break;
}
}
for (int j = 0; j < smps[i]->length; j++) {
enum { INT, FLT } fmt;
if (flags & RAW_AUTO)
fmt = smps[i]->format & (1 << i) ? INT : FLT;
else if (flags & RAW_FLT)
fmt = FLT;
else
fmt = INT;
switch (fmt) {
case FLT:
switch (bits) {
case 32: f32[o++] = SWAP_FLT_TOE(flags & RAW_BE_FLT, smps[i]->data[j].f); break;
case 64: f64[o++] = SWAP_DBL_TOE(flags & RAW_BE_FLT, smps[i]->data[j].f); break;
}
break;
case INT:
switch (bits) {
case 8: i8 [o++] = smps[i]->data[j].i; break;
case 16: i16[o++] = SWAP_INT_TOE(flags & RAW_BE_INT, 16, smps[i]->data[j].i); break;
case 32: i32[o++] = SWAP_INT_TOE(flags & RAW_BE_INT, 32, smps[i]->data[j].i); break;
case 64: i64[o++] = SWAP_INT_TOE(flags & RAW_BE_INT, 64, smps[i]->data[j].i); break;
}
break;
}
}
}
if (wbytes)
*wbytes = o * (bits / 8);
return i;
}
int raw_sscan(char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt, int *flags)
{
/* The raw format can not encode multiple samples in one buffer
* as there is no support for framing. */
struct sample *smp = smps[0];
int8_t *i8 = (void *) buf;
int16_t *i16 = (void *) buf;
int32_t *i32 = (void *) buf;
int64_t *i64 = (void *) buf;
float *f32 = (void *) buf;
double *f64 = (void *) buf;
int off, bits = 1 << (*flags >> 24);
smp->length = len / (bits / 8);
if (*flags & RAW_FAKE) {
off = 3;
if (smp->length < off) {
// warn("Node %s received a packet with no fake header. Skipping...", node_name(n));
return 0;
}
smp->length -= off;
switch (bits) {
case 32:
smp->sequence = SWAP_INT_TOH(*flags & RAW_BE_HDR, 32, i32[0]);
smp->ts.origin.tv_sec = SWAP_INT_TOH(*flags & RAW_BE_HDR, 32, i32[1]);
smp->ts.origin.tv_nsec = SWAP_INT_TOH(*flags & RAW_BE_HDR, 32, i32[2]);
break;
case 64:
smp->sequence = SWAP_INT_TOH(*flags & RAW_BE_HDR, 64, i64[0]);
smp->ts.origin.tv_sec = SWAP_INT_TOH(*flags & RAW_BE_HDR, 64, i64[1]);
smp->ts.origin.tv_nsec = SWAP_INT_TOH(*flags & RAW_BE_HDR, 64, i64[2]);
break;
}
}
else {
off = 0;
smp->sequence = 0;
smp->ts.origin.tv_sec = 0;
smp->ts.origin.tv_nsec = 0;
}
if (smp->length > smp->capacity) {
warn("Received more values than supported: length=%u, capacity=%u", smp->length, smp->capacity);
smp->length = smp->capacity;
}
for (int i = 0; i < smp->length; i++) {
int fmt = *flags & RAW_FLT ? SAMPLE_DATA_FORMAT_FLOAT
: SAMPLE_DATA_FORMAT_INT;
sample_set_data_format(smp, i, fmt);
switch (fmt) {
case SAMPLE_DATA_FORMAT_FLOAT:
switch (bits) {
case 32: smp->data[i].f = SWAP_FLT_TOH(*flags & RAW_BE_FLT, f32[i+off]); break;
case 64: smp->data[i].f = SWAP_DBL_TOH(*flags & RAW_BE_FLT, f64[i+off]); break;
}
break;
case SAMPLE_DATA_FORMAT_INT:
switch (bits) {
case 8: smp->data[i].i = i8[i]; break;
case 16: smp->data[i].i = (int16_t) SWAP_INT_TOH(*flags & RAW_BE_INT, 16, i16[i+off]); break;
case 32: smp->data[i].i = (int32_t) SWAP_INT_TOH(*flags & RAW_BE_INT, 32, i32[i+off]); break;
case 64: smp->data[i].i = (int64_t) SWAP_INT_TOH(*flags & RAW_BE_INT, 64, i64[i+off]); break;
}
break;
}
}
smp->ts.received.tv_sec = 0;
smp->ts.received.tv_nsec = 0;
if (rbytes)
*rbytes = len;
return 1;
}
#define REGISTER_FORMAT_RAW(i, n, f) \
static struct plugin i = { \
.name = n, \
.description = "RAW binary data", \
.type = PLUGIN_TYPE_IO, \
.io = { \
.flags = f | IO_FORMAT_BINARY, \
.sprint = raw_sprint, \
.sscan = raw_sscan \
} \
}; \
REGISTER_PLUGIN(& i);
/* Feel free to add additional format identifiers here to suit your needs */
REGISTER_FORMAT_RAW(p, "raw", 0)
REGISTER_FORMAT_RAW(p_f32, "raw-flt32", RAW_32 | RAW_FLT)
REGISTER_FORMAT_RAW(p_f64, "raw-flt64", RAW_64 | RAW_FLT)
REGISTER_FORMAT_RAW(p_i8, "raw-int8", RAW_8)
REGISTER_FORMAT_RAW(p_i16be, "raw-int16-be", RAW_16 | RAW_BE)
REGISTER_FORMAT_RAW(p_i16le, "raw-int16-le", RAW_16)
REGISTER_FORMAT_RAW(p_i32be, "raw-int32-be", RAW_32 | RAW_BE)
REGISTER_FORMAT_RAW(p_i32le, "raw-int32-le", RAW_32)
REGISTER_FORMAT_RAW(p_i64be, "raw-int64-be", RAW_64 | RAW_BE)
REGISTER_FORMAT_RAW(p_i64le, "raw-int64-le", RAW_64)
REGISTER_FORMAT_RAW(p_gtnet, "gtnet", RAW_32 | RAW_FLT | RAW_BE)
REGISTER_FORMAT_RAW(p_gtnef, "gtnet-fake", RAW_32 | RAW_FLT | RAW_BE | RAW_FAKE)
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