libsigrok
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros
text.c
Go to the documentation of this file.
1 /*
2  * This file is part of the sigrok project.
3  *
4  * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5  * Copyright (C) 2011 HÃ¥vard Espeland <gus@ping.uio.no>
6  *
7  * This program is free software: you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation, either version 3 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <glib.h>
25 #include "config.h"
26 #include "sigrok.h"
27 #include "sigrok-internal.h"
28 #include "text.h"
29 
30 SR_PRIV void flush_linebufs(struct context *ctx, uint8_t *outbuf)
31 {
32  static int max_probename_len = 0;
33  int len, i;
34 
35  if (ctx->linebuf[0] == 0)
36  return;
37 
38  if (max_probename_len == 0) {
39  /* First time through... */
40  for (i = 0; ctx->probelist[i]; i++) {
41  len = strlen(ctx->probelist[i]);
42  if (len > max_probename_len)
43  max_probename_len = len;
44  }
45  }
46 
47  for (i = 0; ctx->probelist[i]; i++) {
48  sprintf((char *)outbuf + strlen((const char *)outbuf),
49  "%*s:%s\n", max_probename_len,
50  ctx->probelist[i], ctx->linebuf + i * ctx->linebuf_len);
51  }
52 
53  /* Mark trigger with a ^ character. */
54  if (ctx->mark_trigger != -1)
55  {
56  int space_offset = ctx->mark_trigger / 8;
57 
58  if (ctx->mode == MODE_ASCII)
59  space_offset = 0;
60 
61  sprintf((char *)outbuf + strlen((const char *)outbuf),
62  "T:%*s^\n", ctx->mark_trigger + space_offset, "");
63  }
64 
65  memset(ctx->linebuf, 0, i * ctx->linebuf_len);
66 }
67 
68 SR_PRIV int init(struct sr_output *o, int default_spl, enum outputmode mode)
69 {
70  struct context *ctx;
71  struct sr_probe *probe;
72  GSList *l;
73  uint64_t samplerate;
74  int num_probes;
75  char *samplerate_s;
76 
77  if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
78  sr_err("text out: %s: ctx malloc failed", __func__);
79  return SR_ERR_MALLOC;
80  }
81 
82  o->internal = ctx;
83  ctx->num_enabled_probes = 0;
84 
85  for (l = o->dev->probes; l; l = l->next) {
86  probe = l->data;
87  if (!probe->enabled)
88  continue;
89  ctx->probelist[ctx->num_enabled_probes++] = probe->name;
90  }
91 
92  ctx->probelist[ctx->num_enabled_probes] = 0;
93  ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
94  ctx->line_offset = 0;
95  ctx->spl_cnt = 0;
96  ctx->mark_trigger = -1;
97  ctx->mode = mode;
98 
99  if (o->param && o->param[0]) {
100  ctx->samples_per_line = strtoul(o->param, NULL, 10);
101  if (ctx->samples_per_line < 1)
102  return SR_ERR;
103  } else
104  ctx->samples_per_line = default_spl;
105 
106  if (!(ctx->header = g_try_malloc0(512))) {
107  g_free(ctx);
108  sr_err("text out: %s: ctx->header malloc failed", __func__);
109  return SR_ERR_MALLOC;
110  }
111 
112  snprintf(ctx->header, 511, "%s\n", PACKAGE_STRING);
113  num_probes = g_slist_length(o->dev->probes);
115  samplerate = *((uint64_t *) o->dev->driver->dev_info_get(
117  if (!(samplerate_s = sr_samplerate_string(samplerate))) {
118  g_free(ctx->header);
119  g_free(ctx);
120  return SR_ERR;
121  }
122  snprintf(ctx->header + strlen(ctx->header),
123  511 - strlen(ctx->header),
124  "Acquisition with %d/%d probes at %s\n",
125  ctx->num_enabled_probes, num_probes, samplerate_s);
126  g_free(samplerate_s);
127  }
128 
129  ctx->linebuf_len = ctx->samples_per_line * 2 + 4;
130  if (!(ctx->linebuf = g_try_malloc0(num_probes * ctx->linebuf_len))) {
131  g_free(ctx->header);
132  g_free(ctx);
133  sr_err("text out: %s: ctx->linebuf malloc failed", __func__);
134  return SR_ERR_MALLOC;
135  }
136  if (!(ctx->linevalues = g_try_malloc0(num_probes))) {
137  g_free(ctx->header);
138  g_free(ctx);
139  sr_err("text out: %s: ctx->linevalues malloc failed", __func__);
140  return SR_ERR_MALLOC;
141  }
142 
143  return SR_OK;
144 }
145 
146 SR_PRIV int event(struct sr_output *o, int event_type, uint8_t **data_out,
147  uint64_t *length_out)
148 {
149  struct context *ctx;
150  int outsize;
151  uint8_t *outbuf;
152 
153  ctx = o->internal;
154  switch (event_type) {
155  case SR_DF_TRIGGER:
156  ctx->mark_trigger = ctx->spl_cnt;
157  *data_out = NULL;
158  *length_out = 0;
159  break;
160  case SR_DF_END:
161  outsize = ctx->num_enabled_probes
162  * (ctx->samples_per_line + 20) + 512;
163  if (!(outbuf = g_try_malloc0(outsize))) {
164  sr_err("text out: %s: outbuf malloc failed", __func__);
165  return SR_ERR_MALLOC;
166  }
167  flush_linebufs(ctx, outbuf);
168  *data_out = outbuf;
169  *length_out = strlen((const char *)outbuf);
170  g_free(o->internal);
171  o->internal = NULL;
172  break;
173  default:
174  *data_out = NULL;
175  *length_out = 0;
176  break;
177  }
178 
179  return SR_OK;
180 }