libsigrok/output/text/hex.c

107 lines
2.9 KiB
C

/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
* Copyright (C) 2011 Håvard Espeland <gus@ping.uio.no>
*
* 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
* (at your option) 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 <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "text.h"
#define LOG_PREFIX "output/hex"
SR_PRIV int init_hex(struct sr_output *o)
{
return init(o, DEFAULT_BPL_HEX, MODE_HEX);
}
SR_PRIV int data_hex(struct sr_output *o, const uint8_t *data_in,
uint64_t length_in, uint8_t **data_out,
uint64_t *length_out)
{
struct context *ctx;
unsigned int outsize, offset, p;
int max_linelen;
const uint8_t *sample;
uint8_t *outbuf;
ctx = o->internal;
max_linelen = SR_MAX_CHANNELNAME_LEN + 3 + ctx->samples_per_line
+ ctx->samples_per_line / 2;
outsize = length_in / ctx->unitsize * ctx->num_enabled_channels
/ ctx->samples_per_line * max_linelen + 512;
if (!(outbuf = g_try_malloc0(outsize + 1))) {
sr_err("%s: outbuf malloc failed", __func__);
return SR_ERR_MALLOC;
}
outbuf[0] = '\0';
if (ctx->header) {
/* The header is still here, this must be the first packet. */
strncpy((char *)outbuf, ctx->header, outsize);
g_free(ctx->header);
ctx->header = NULL;
}
ctx->line_offset = 0;
for (offset = 0; offset <= length_in - ctx->unitsize;
offset += ctx->unitsize) {
sample = data_in + offset;
for (p = 0; p < ctx->num_enabled_channels; p++) {
ctx->linevalues[p] <<= 1;
if (sample[p / 8] & ((uint8_t) 1 << (p % 8)))
ctx->linevalues[p] |= 1;
sprintf((char *)ctx->linebuf + (p * ctx->linebuf_len) +
ctx->line_offset, "%.2x", ctx->linevalues[p]);
}
ctx->spl_cnt++;
/* Add a space after every complete hex byte. */
if ((ctx->spl_cnt & 7) == 0) {
for (p = 0; p < ctx->num_enabled_channels; p++)
ctx->linebuf[p * ctx->linebuf_len +
ctx->line_offset + 2] = ' ';
ctx->line_offset += 3;
}
/* End of line. */
if (ctx->spl_cnt >= ctx->samples_per_line) {
flush_linebufs(ctx, outbuf);
ctx->line_offset = ctx->spl_cnt = 0;
}
}
*data_out = outbuf;
*length_out = strlen((const char *)outbuf);
return SR_OK;
}
SR_PRIV struct sr_output_format output_text_hex = {
.id = "hex",
.description = "Hexadecimal",
.df_type = SR_DF_LOGIC,
.init = init_hex,
.data = data_hex,
.event = event,
.cleanup = text_cleanup,
};