libsigrok/output/text/text.c

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/*
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* This file is part of the libsigrok project.
*
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* Copyright (C) 2013 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 <stdio.h>
#include <string.h>
#include <glib.h>
#include "config.h" /* Needed for PACKAGE_STRING and others. */
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "text.h"
#define LOG_PREFIX "output/text"
SR_PRIV void flush_linebufs(struct context *ctx, uint8_t *outbuf)
{
static int max_probename_len = 0;
int len, i;
GSList *l;
char *probe_name;
if (ctx->linebuf[0] == 0)
return;
if (max_probename_len == 0) {
/* First time through... */
for (l = ctx->probenames; l; l = l->next) {
probe_name = l->data;
len = strlen(probe_name);
if (len > max_probename_len)
max_probename_len = len;
}
}
for (i = 0, l = ctx->probenames; l; l = l->next, i++) {
probe_name = l->data;
sprintf((char *)outbuf + strlen((const char *)outbuf),
"%*s:%s\n", max_probename_len,
probe_name, ctx->linebuf + i * ctx->linebuf_len);
}
/* Mark trigger with a ^ character. */
if (ctx->mark_trigger != -1)
{
int space_offset = ctx->mark_trigger / 8;
if (ctx->mode == MODE_ASCII)
space_offset = 0;
sprintf((char *)outbuf + strlen((const char *)outbuf),
"T:%*s^\n", ctx->mark_trigger + space_offset, "");
}
memset(ctx->linebuf, 0, i * ctx->linebuf_len);
}
SR_PRIV int init(struct sr_output *o, int default_spl, enum outputmode mode)
{
struct context *ctx;
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struct sr_probe *probe;
GSList *l;
GVariant *gvar;
uint64_t samplerate;
int num_probes, ret;
char *samplerate_s;
if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
sr_err("%s: ctx malloc failed", __func__);
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return SR_ERR_MALLOC;
}
o->internal = ctx;
ctx->num_enabled_probes = 0;
ctx->probenames = NULL;
for (l = o->sdi->probes; l; l = l->next) {
probe = l->data;
if (probe->type != SR_PROBE_LOGIC)
continue;
if (!probe->enabled)
continue;
ctx->probenames = g_slist_append(ctx->probenames, probe->name);
ctx->num_enabled_probes++;
}
ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
ctx->line_offset = 0;
ctx->spl_cnt = 0;
ctx->mark_trigger = -1;
ctx->mode = mode;
ret = SR_OK;
if (o->param && o->param[0]) {
ctx->samples_per_line = strtoul(o->param, NULL, 10);
if (ctx->samples_per_line < 1) {
ret = SR_ERR;
goto err;
}
} else
ctx->samples_per_line = default_spl;
if (!(ctx->header = g_try_malloc0(512))) {
sr_err("%s: ctx->header malloc failed", __func__);
ret = SR_ERR_MALLOC;
goto err;
}
snprintf(ctx->header, 511, "%s\n", PACKAGE_STRING);
num_probes = g_slist_length(o->sdi->probes);
if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
&gvar) == SR_OK) {
samplerate = g_variant_get_uint64(gvar);
g_variant_unref(gvar);
if (!(samplerate_s = sr_samplerate_string(samplerate))) {
ret = SR_ERR;
goto err;
}
snprintf(ctx->header + strlen(ctx->header),
511 - strlen(ctx->header),
"Acquisition with %d/%d probes at %s\n",
ctx->num_enabled_probes, num_probes, samplerate_s);
g_free(samplerate_s);
}
ctx->linebuf_len = ctx->samples_per_line * 2 + 4;
if (!(ctx->linebuf = g_try_malloc0(num_probes * ctx->linebuf_len))) {
sr_err("%s: ctx->linebuf malloc failed", __func__);
ret = SR_ERR_MALLOC;
goto err;
}
if (!(ctx->linevalues = g_try_malloc0(num_probes))) {
sr_err("%s: ctx->linevalues malloc failed", __func__);
ret = SR_ERR_MALLOC;
}
if (mode == MODE_ASCII &&
!(ctx->prevsample = g_try_malloc0(num_probes / 8))) {
sr_err("%s: ctx->prevsample malloc failed", __func__);
ret = SR_ERR_MALLOC;
}
err:
if (ret != SR_OK) {
g_free(ctx->header);
g_free(ctx);
}
return ret;
}
SR_PRIV int text_cleanup(struct sr_output *o)
{
struct context *ctx;
if (!o)
return SR_ERR_ARG;
ctx = o->internal;
g_free(ctx->header);
g_free(ctx->linebuf);
g_free(ctx->linevalues);
if (ctx->prevsample)
g_free(ctx->prevsample);
g_slist_free(ctx->probenames);
g_free(ctx);
o->internal = NULL;
return SR_OK;
}
SR_PRIV int event(struct sr_output *o, int event_type, uint8_t **data_out,
uint64_t *length_out)
{
struct context *ctx;
int outsize;
uint8_t *outbuf;
ctx = o->internal;
switch (event_type) {
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case SR_DF_TRIGGER:
ctx->mark_trigger = ctx->spl_cnt;
*data_out = NULL;
*length_out = 0;
break;
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case SR_DF_END:
outsize = ctx->num_enabled_probes
* (ctx->samples_per_line + 20) + 512;
if (!(outbuf = g_try_malloc0(outsize))) {
sr_err("%s: outbuf malloc failed", __func__);
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return SR_ERR_MALLOC;
}
flush_linebufs(ctx, outbuf);
*data_out = outbuf;
*length_out = strlen((const char *)outbuf);
break;
default:
*data_out = NULL;
*length_out = 0;
break;
}
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return SR_OK;
}