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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.de> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <glib.h> | |
23 | #include <libsigrok/libsigrok.h> | |
24 | #include "libsigrok-internal.h" | |
25 | ||
26 | #define LOG_PREFIX "input/csv" | |
27 | ||
28 | /* | |
29 | * The CSV input module has the following options: | |
30 | * | |
31 | * single-column: Specifies the column number which stores the sample data for | |
32 | * single column mode and enables single column mode. Multi | |
33 | * column mode is used if this parameter is omitted. | |
34 | * | |
35 | * numchannels: Specifies the number of channels to use. In multi column mode | |
36 | * the number of channels are the number of columns and in single | |
37 | * column mode the number of bits (LSB first) beginning at | |
38 | * 'first-channel'. | |
39 | * | |
40 | * delimiter: Specifies the delimiter for columns. Must be at least one | |
41 | * character. Comma is used as default delimiter. | |
42 | * | |
43 | * format: Specifies the format of the sample data in single column mode. | |
44 | * Available formats are: 'bin', 'hex' and 'oct'. The binary | |
45 | * format is used by default. This option has no effect in multi | |
46 | * column mode. | |
47 | * | |
48 | * comment: Specifies the prefix character(s) for comments. No prefix | |
49 | * characters are used by default which disables removing of | |
50 | * comments. | |
51 | * | |
52 | * samplerate: Samplerate which the sample data was captured with. Default | |
53 | * value is 0. | |
54 | * | |
55 | * first-channel: Column number of the first channel in multi column mode and | |
56 | * position of the bit for the first channel in single column mode. | |
57 | * Default value is 0. | |
58 | * | |
59 | * header: Determines if the first line should be treated as header | |
60 | * and used for channel names in multi column mode. Empty header | |
61 | * names will be replaced by the channel number. If enabled in | |
62 | * single column mode the first line will be skipped. Usage of | |
63 | * header is disabled by default. | |
64 | * | |
65 | * startline: Line number to start processing sample data. Must be greater | |
66 | * than 0. The default line number to start processing is 1. | |
67 | */ | |
68 | ||
69 | /* Single column formats. */ | |
70 | enum { | |
71 | FORMAT_BIN, | |
72 | FORMAT_HEX, | |
73 | FORMAT_OCT | |
74 | }; | |
75 | ||
76 | struct context { | |
77 | gboolean started; | |
78 | ||
79 | /* Current selected samplerate. */ | |
80 | uint64_t samplerate; | |
81 | ||
82 | /* Number of channels. */ | |
83 | gsize num_channels; | |
84 | ||
85 | /* Column delimiter character(s). */ | |
86 | GString *delimiter; | |
87 | ||
88 | /* Comment prefix character(s). */ | |
89 | GString *comment; | |
90 | ||
91 | /* Termination character(s) used in current stream. */ | |
92 | char *termination; | |
93 | ||
94 | /* Determines if sample data is stored in multiple columns. */ | |
95 | gboolean multi_column_mode; | |
96 | ||
97 | /* Column number of the sample data in single column mode. */ | |
98 | gsize single_column; | |
99 | ||
100 | /* | |
101 | * Number of the first column to parse. Equivalent to the number of the | |
102 | * first channel in multi column mode and the single column number in | |
103 | * single column mode. | |
104 | */ | |
105 | gsize first_column; | |
106 | ||
107 | /* | |
108 | * Column number of the first channel in multi column mode and position of | |
109 | * the bit for the first channel in single column mode. | |
110 | */ | |
111 | gsize first_channel; | |
112 | ||
113 | /* Line number to start processing. */ | |
114 | gsize start_line; | |
115 | ||
116 | /* | |
117 | * Determines if the first line should be treated as header and used for | |
118 | * channel names in multi column mode. | |
119 | */ | |
120 | gboolean header; | |
121 | ||
122 | /* Format sample data is stored in single column mode. */ | |
123 | int format; | |
124 | ||
125 | /* Size of the sample buffer. */ | |
126 | gsize sample_buffer_size; | |
127 | ||
128 | /* Buffer to store sample data. */ | |
129 | uint8_t *sample_buffer; | |
130 | ||
131 | /* Current line number. */ | |
132 | gsize line_number; | |
133 | }; | |
134 | ||
135 | static int format_match(GHashTable *metadata) | |
136 | { | |
137 | char *buf; | |
138 | ||
139 | buf = g_hash_table_lookup(metadata, GINT_TO_POINTER(SR_INPUT_META_MIMETYPE)); | |
140 | if (!strcmp(buf, "text/csv")) | |
141 | return SR_OK; | |
142 | ||
143 | return SR_ERR; | |
144 | } | |
145 | ||
146 | static void strip_comment(char *buf, const GString *prefix) | |
147 | { | |
148 | char *ptr; | |
149 | ||
150 | if (!prefix->len) | |
151 | return; | |
152 | ||
153 | if ((ptr = strstr(buf, prefix->str))) | |
154 | *ptr = '\0'; | |
155 | } | |
156 | ||
157 | static int parse_binstr(const char *str, struct context *inc) | |
158 | { | |
159 | gsize i, j, length; | |
160 | ||
161 | length = strlen(str); | |
162 | ||
163 | if (!length) { | |
164 | sr_err("Column %zu in line %zu is empty.", inc->single_column, | |
165 | inc->line_number); | |
166 | return SR_ERR; | |
167 | } | |
168 | ||
169 | /* Clear buffer in order to set bits only. */ | |
170 | memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3); | |
171 | ||
172 | i = inc->first_channel; | |
173 | ||
174 | for (j = 0; i < length && j < inc->num_channels; i++, j++) { | |
175 | if (str[length - i - 1] == '1') { | |
176 | inc->sample_buffer[j / 8] |= (1 << (j % 8)); | |
177 | } else if (str[length - i - 1] != '0') { | |
178 | sr_err("Invalid value '%s' in column %zu in line %zu.", | |
179 | str, inc->single_column, inc->line_number); | |
180 | return SR_ERR; | |
181 | } | |
182 | } | |
183 | ||
184 | return SR_OK; | |
185 | } | |
186 | ||
187 | static int parse_hexstr(const char *str, struct context *inc) | |
188 | { | |
189 | gsize i, j, k, length; | |
190 | uint8_t value; | |
191 | char c; | |
192 | ||
193 | length = strlen(str); | |
194 | ||
195 | if (!length) { | |
196 | sr_err("Column %zu in line %zu is empty.", inc->single_column, | |
197 | inc->line_number); | |
198 | return SR_ERR; | |
199 | } | |
200 | ||
201 | /* Clear buffer in order to set bits only. */ | |
202 | memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3); | |
203 | ||
204 | /* Calculate the position of the first hexadecimal digit. */ | |
205 | i = inc->first_channel / 4; | |
206 | ||
207 | for (j = 0; i < length && j < inc->num_channels; i++) { | |
208 | c = str[length - i - 1]; | |
209 | ||
210 | if (!g_ascii_isxdigit(c)) { | |
211 | sr_err("Invalid value '%s' in column %zu in line %zu.", | |
212 | str, inc->single_column, inc->line_number); | |
213 | return SR_ERR; | |
214 | } | |
215 | ||
216 | value = g_ascii_xdigit_value(c); | |
217 | ||
218 | k = (inc->first_channel + j) % 4; | |
219 | ||
220 | for (; j < inc->num_channels && k < 4; k++) { | |
221 | if (value & (1 << k)) | |
222 | inc->sample_buffer[j / 8] |= (1 << (j % 8)); | |
223 | ||
224 | j++; | |
225 | } | |
226 | } | |
227 | ||
228 | return SR_OK; | |
229 | } | |
230 | ||
231 | static int parse_octstr(const char *str, struct context *inc) | |
232 | { | |
233 | gsize i, j, k, length; | |
234 | uint8_t value; | |
235 | char c; | |
236 | ||
237 | length = strlen(str); | |
238 | ||
239 | if (!length) { | |
240 | sr_err("Column %zu in line %zu is empty.", inc->single_column, | |
241 | inc->line_number); | |
242 | return SR_ERR; | |
243 | } | |
244 | ||
245 | /* Clear buffer in order to set bits only. */ | |
246 | memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3); | |
247 | ||
248 | /* Calculate the position of the first octal digit. */ | |
249 | i = inc->first_channel / 3; | |
250 | ||
251 | for (j = 0; i < length && j < inc->num_channels; i++) { | |
252 | c = str[length - i - 1]; | |
253 | ||
254 | if (c < '0' || c > '7') { | |
255 | sr_err("Invalid value '%s' in column %zu in line %zu.", | |
256 | str, inc->single_column, inc->line_number); | |
257 | return SR_ERR; | |
258 | } | |
259 | ||
260 | value = g_ascii_xdigit_value(c); | |
261 | ||
262 | k = (inc->first_channel + j) % 3; | |
263 | ||
264 | for (; j < inc->num_channels && k < 3; k++) { | |
265 | if (value & (1 << k)) | |
266 | inc->sample_buffer[j / 8] |= (1 << (j % 8)); | |
267 | ||
268 | j++; | |
269 | } | |
270 | } | |
271 | ||
272 | return SR_OK; | |
273 | } | |
274 | ||
275 | static char **parse_line(char *buf, struct context *inc, int max_columns) | |
276 | { | |
277 | const char *str, *remainder; | |
278 | GSList *list, *l; | |
279 | char **columns; | |
280 | char *column; | |
281 | gsize n, k; | |
282 | ||
283 | n = 0; | |
284 | k = 0; | |
285 | list = NULL; | |
286 | ||
287 | remainder = buf; | |
288 | str = strstr(remainder, inc->delimiter->str); | |
289 | ||
290 | while (str && max_columns) { | |
291 | if (n >= inc->first_column) { | |
292 | column = g_strndup(remainder, str - remainder); | |
293 | list = g_slist_prepend(list, g_strstrip(column)); | |
294 | ||
295 | max_columns--; | |
296 | k++; | |
297 | } | |
298 | ||
299 | remainder = str + inc->delimiter->len; | |
300 | str = strstr(remainder, inc->delimiter->str); | |
301 | n++; | |
302 | } | |
303 | ||
304 | if (buf[0] && max_columns && n >= inc->first_column) { | |
305 | column = g_strdup(remainder); | |
306 | list = g_slist_prepend(list, g_strstrip(column)); | |
307 | k++; | |
308 | } | |
309 | ||
310 | if (!(columns = g_try_new(char *, k + 1))) | |
311 | return NULL; | |
312 | ||
313 | columns[k--] = NULL; | |
314 | ||
315 | for (l = list; l; l = l->next) | |
316 | columns[k--] = l->data; | |
317 | ||
318 | g_slist_free(list); | |
319 | ||
320 | return columns; | |
321 | } | |
322 | ||
323 | static int parse_multi_columns(char **columns, struct context *inc) | |
324 | { | |
325 | gsize i; | |
326 | ||
327 | /* Clear buffer in order to set bits only. */ | |
328 | memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3); | |
329 | ||
330 | for (i = 0; i < inc->num_channels; i++) { | |
331 | if (columns[i][0] == '1') { | |
332 | inc->sample_buffer[i / 8] |= (1 << (i % 8)); | |
333 | } else if (!strlen(columns[i])) { | |
334 | sr_err("Column %zu in line %zu is empty.", | |
335 | inc->first_channel + i, inc->line_number); | |
336 | return SR_ERR; | |
337 | } else if (columns[i][0] != '0') { | |
338 | sr_err("Invalid value '%s' in column %zu in line %zu.", | |
339 | columns[i], inc->first_channel + i, | |
340 | inc->line_number); | |
341 | return SR_ERR; | |
342 | } | |
343 | } | |
344 | ||
345 | return SR_OK; | |
346 | } | |
347 | ||
348 | static int parse_single_column(const char *column, struct context *inc) | |
349 | { | |
350 | int res; | |
351 | ||
352 | res = SR_ERR; | |
353 | ||
354 | switch (inc->format) { | |
355 | case FORMAT_BIN: | |
356 | res = parse_binstr(column, inc); | |
357 | break; | |
358 | case FORMAT_HEX: | |
359 | res = parse_hexstr(column, inc); | |
360 | break; | |
361 | case FORMAT_OCT: | |
362 | res = parse_octstr(column, inc); | |
363 | break; | |
364 | } | |
365 | ||
366 | return res; | |
367 | } | |
368 | ||
369 | static int send_samples(const struct sr_dev_inst *sdi, uint8_t *buffer, | |
370 | gsize buffer_size, gsize count) | |
371 | { | |
372 | struct sr_datafeed_packet packet; | |
373 | struct sr_datafeed_logic logic; | |
374 | int res; | |
375 | gsize i; | |
376 | ||
377 | packet.type = SR_DF_LOGIC; | |
378 | packet.payload = &logic; | |
379 | logic.unitsize = buffer_size; | |
380 | logic.length = buffer_size; | |
381 | logic.data = buffer; | |
382 | ||
383 | for (i = 0; i < count; i++) { | |
384 | if ((res = sr_session_send(sdi, &packet)) != SR_OK) | |
385 | return res; | |
386 | } | |
387 | ||
388 | return SR_OK; | |
389 | } | |
390 | ||
391 | static int init(struct sr_input *in, GHashTable *options) | |
392 | { | |
393 | struct context *inc; | |
394 | const char *s; | |
395 | ||
396 | in->sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
397 | in->priv = inc = g_malloc0(sizeof(struct context)); | |
398 | ||
399 | inc->single_column = g_variant_get_int32(g_hash_table_lookup(options, "single-column")); | |
400 | inc->multi_column_mode = inc->single_column == 0; | |
401 | ||
402 | inc->num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
403 | ||
404 | inc->delimiter = g_string_new(g_variant_get_string( | |
405 | g_hash_table_lookup(options, "delimiter"), NULL)); | |
406 | if (inc->delimiter->len == 0) { | |
407 | sr_err("Delimiter must be at least one character."); | |
408 | return SR_ERR_ARG; | |
409 | } | |
410 | ||
411 | s = g_variant_get_string(g_hash_table_lookup(options, "format"), NULL); | |
412 | if (!g_ascii_strncasecmp(s, "bin", 3)) { | |
413 | inc->format = FORMAT_BIN; | |
414 | } else if (!g_ascii_strncasecmp(s, "hex", 3)) { | |
415 | inc->format = FORMAT_HEX; | |
416 | } else if (!g_ascii_strncasecmp(s, "oct", 3)) { | |
417 | inc->format = FORMAT_OCT; | |
418 | } else { | |
419 | sr_err("Invalid format: '%s'", s); | |
420 | return SR_ERR_ARG; | |
421 | } | |
422 | ||
423 | inc->comment = g_string_new(g_variant_get_string( | |
424 | g_hash_table_lookup(options, "comment"), NULL)); | |
425 | if (g_string_equal(inc->comment, inc->delimiter)) { | |
426 | /* That's never going to work. Likely the result of the user | |
427 | * setting the delimiter to ; -- the default comment. Clearing | |
428 | * the comment setting will work in that case. */ | |
429 | g_string_truncate(inc->comment, 0); | |
430 | } | |
431 | ||
432 | inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate")); | |
433 | ||
434 | inc->first_channel = g_variant_get_int32(g_hash_table_lookup(options, "first-channel")); | |
435 | ||
436 | inc->header = g_variant_get_boolean(g_hash_table_lookup(options, "header")); | |
437 | ||
438 | inc->start_line = g_variant_get_int32(g_hash_table_lookup(options, "startline")); | |
439 | if (inc->start_line < 1) { | |
440 | sr_err("Invalid start line %d.", inc->start_line); | |
441 | return SR_ERR_ARG; | |
442 | } | |
443 | ||
444 | if (inc->multi_column_mode) | |
445 | inc->first_column = inc->first_channel; | |
446 | else | |
447 | inc->first_column = inc->single_column; | |
448 | ||
449 | if (!inc->multi_column_mode && !inc->num_channels) { | |
450 | sr_err("Number of channels needs to be specified in single column mode."); | |
451 | return SR_ERR_ARG; | |
452 | } | |
453 | ||
454 | return SR_OK; | |
455 | } | |
456 | ||
457 | static const char *get_line_termination(GString *buf) | |
458 | { | |
459 | const char *term; | |
460 | ||
461 | term = NULL; | |
462 | if (g_strstr_len(buf->str, buf->len, "\r\n")) | |
463 | term = "\r\n"; | |
464 | else if (memchr(buf->str, '\n', buf->len)) | |
465 | term = "\n"; | |
466 | else if (memchr(buf->str, '\r', buf->len)) | |
467 | term = "\r"; | |
468 | ||
469 | return term; | |
470 | } | |
471 | ||
472 | static int initial_parse(const struct sr_input *in, GString *buf) | |
473 | { | |
474 | struct context *inc; | |
475 | GString *channel_name; | |
476 | gsize num_columns, l, i; | |
477 | unsigned int line_number; | |
478 | int ret; | |
479 | char **lines, **columns; | |
480 | ||
481 | ret = SR_OK; | |
482 | inc = in->priv; | |
483 | columns = NULL; | |
484 | ||
485 | line_number = 0; | |
486 | lines = g_strsplit_set(buf->str, "\r\n", 0); | |
487 | for (l = 0; lines[l]; l++) { | |
488 | line_number++; | |
489 | if (inc->start_line > line_number) { | |
490 | sr_spew("Line %zu skipped.", line_number); | |
491 | continue; | |
492 | } | |
493 | if (lines[l][0] == '\0') { | |
494 | sr_spew("Blank line %zu skipped.", line_number); | |
495 | continue; | |
496 | } | |
497 | strip_comment(lines[l], inc->comment); | |
498 | if (lines[l][0] == '\0') { | |
499 | sr_spew("Comment-only line %zu skipped.", line_number); | |
500 | continue; | |
501 | } | |
502 | ||
503 | /* Reached first proper line. */ | |
504 | break; | |
505 | } | |
506 | if (!lines[l]) { | |
507 | /* Not enough data for a proper line yet. */ | |
508 | ret = SR_ERR_NA; | |
509 | goto out; | |
510 | } | |
511 | ||
512 | /* | |
513 | * In order to determine the number of columns parse the current line | |
514 | * without limiting the number of columns. | |
515 | */ | |
516 | if (!(columns = parse_line(lines[l], inc, -1))) { | |
517 | sr_err("Error while parsing line %zu.", line_number); | |
518 | ret = SR_ERR; | |
519 | goto out; | |
520 | } | |
521 | num_columns = g_strv_length(columns); | |
522 | ||
523 | /* Ensure that the first column is not out of bounds. */ | |
524 | if (!num_columns) { | |
525 | sr_err("Column %zu in line %zu is out of bounds.", | |
526 | inc->first_column, line_number); | |
527 | ret = SR_ERR; | |
528 | goto out; | |
529 | } | |
530 | ||
531 | if (inc->multi_column_mode) { | |
532 | /* | |
533 | * Detect the number of channels in multi column mode | |
534 | * automatically if not specified. | |
535 | */ | |
536 | if (!inc->num_channels) { | |
537 | inc->num_channels = num_columns; | |
538 | sr_dbg("Number of auto-detected channels: %zu.", | |
539 | inc->num_channels); | |
540 | } | |
541 | ||
542 | /* | |
543 | * Ensure that the number of channels does not exceed the number | |
544 | * of columns in multi column mode. | |
545 | */ | |
546 | if (num_columns < inc->num_channels) { | |
547 | sr_err("Not enough columns for desired number of channels in line %zu.", | |
548 | line_number); | |
549 | ret = SR_ERR; | |
550 | goto out; | |
551 | } | |
552 | } | |
553 | ||
554 | channel_name = g_string_sized_new(64); | |
555 | for (i = 0; i < inc->num_channels; i++) { | |
556 | if (inc->header && inc->multi_column_mode && strlen(columns[i])) | |
557 | g_string_assign(channel_name, columns[i]); | |
558 | else | |
559 | g_string_printf(channel_name, "%zu", i); | |
560 | sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name->str); | |
561 | } | |
562 | g_string_free(channel_name, TRUE); | |
563 | ||
564 | /* | |
565 | * Calculate the minimum buffer size to store the sample data of the | |
566 | * channels. | |
567 | */ | |
568 | inc->sample_buffer_size = (inc->num_channels + 7) >> 3; | |
569 | inc->sample_buffer = g_malloc(inc->sample_buffer_size); | |
570 | ||
571 | out: | |
572 | if (columns) | |
573 | g_strfreev(columns); | |
574 | g_strfreev(lines); | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
579 | static int initial_receive(const struct sr_input *in) | |
580 | { | |
581 | struct context *inc; | |
582 | GString *new_buf; | |
583 | int len, ret; | |
584 | char *p; | |
585 | const char *termination; | |
586 | ||
587 | inc = in->priv; | |
588 | ||
589 | if (!(termination = get_line_termination(in->buf))) | |
590 | /* Don't have a full line yet. */ | |
591 | return SR_ERR_NA; | |
592 | ||
593 | if (!(p = g_strrstr_len(in->buf->str, in->buf->len, termination))) | |
594 | /* Don't have a full line yet. */ | |
595 | return SR_ERR_NA; | |
596 | len = p - in->buf->str - 1; | |
597 | new_buf = g_string_new_len(in->buf->str, len); | |
598 | g_string_append_c(new_buf, '\0'); | |
599 | ||
600 | inc->termination = g_strdup(termination); | |
601 | ||
602 | if (in->buf->str[0] != '\0') | |
603 | ret = initial_parse(in, new_buf); | |
604 | else | |
605 | ret = SR_OK; | |
606 | ||
607 | g_string_free(new_buf, TRUE); | |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
612 | static int process_buffer(struct sr_input *in) | |
613 | { | |
614 | struct sr_datafeed_packet packet; | |
615 | struct sr_datafeed_meta meta; | |
616 | struct sr_config *src; | |
617 | struct context *inc; | |
618 | gsize num_columns; | |
619 | uint64_t samplerate; | |
620 | int max_columns, ret, l; | |
621 | char *p, **lines, **columns; | |
622 | ||
623 | inc = in->priv; | |
624 | if (!inc->started) { | |
625 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
626 | ||
627 | if (inc->samplerate) { | |
628 | packet.type = SR_DF_META; | |
629 | packet.payload = &meta; | |
630 | samplerate = inc->samplerate; | |
631 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(samplerate)); | |
632 | meta.config = g_slist_append(NULL, src); | |
633 | sr_session_send(in->sdi, &packet); | |
634 | sr_config_free(src); | |
635 | } | |
636 | ||
637 | inc->started = TRUE; | |
638 | } | |
639 | ||
640 | if (!(p = g_strrstr_len(in->buf->str, in->buf->len, inc->termination))) | |
641 | /* Don't have a full line. */ | |
642 | return SR_ERR; | |
643 | ||
644 | *p = '\0'; | |
645 | g_strstrip(in->buf->str); | |
646 | ||
647 | /* Limit the number of columns to parse. */ | |
648 | if (inc->multi_column_mode) | |
649 | max_columns = inc->num_channels; | |
650 | else | |
651 | max_columns = 1; | |
652 | ||
653 | ret = SR_OK; | |
654 | lines = g_strsplit_set(in->buf->str, "\r\n", 0); | |
655 | for (l = 0; lines[l]; l++) { | |
656 | inc->line_number++; | |
657 | if (lines[l][0] == '\0') { | |
658 | sr_spew("Blank line %zu skipped.", inc->line_number); | |
659 | continue; | |
660 | } | |
661 | ||
662 | /* Remove trailing comment. */ | |
663 | strip_comment(lines[l], inc->comment); | |
664 | if (lines[l][0] == '\0') { | |
665 | sr_spew("Comment-only line %zu skipped.", inc->line_number); | |
666 | continue; | |
667 | } | |
668 | ||
669 | /* Skip the header line, its content was used as the channel names. */ | |
670 | if (inc->header) { | |
671 | sr_spew("Header line %zu skipped.", inc->line_number); | |
672 | inc->header = FALSE; | |
673 | continue; | |
674 | } | |
675 | ||
676 | if (!(columns = parse_line(lines[l], inc, max_columns))) { | |
677 | sr_err("Error while parsing line %zu.", inc->line_number); | |
678 | return SR_ERR; | |
679 | } | |
680 | num_columns = g_strv_length(columns); | |
681 | if (!num_columns) { | |
682 | sr_err("Column %zu in line %zu is out of bounds.", | |
683 | inc->first_column, inc->line_number); | |
684 | g_strfreev(columns); | |
685 | return SR_ERR; | |
686 | } | |
687 | /* | |
688 | * Ensure that the number of channels does not exceed the number | |
689 | * of columns in multi column mode. | |
690 | */ | |
691 | if (inc->multi_column_mode && num_columns < inc->num_channels) { | |
692 | sr_err("Not enough columns for desired number of channels in line %zu.", | |
693 | inc->line_number); | |
694 | g_strfreev(columns); | |
695 | return SR_ERR; | |
696 | } | |
697 | ||
698 | if (inc->multi_column_mode) | |
699 | ret = parse_multi_columns(columns, inc); | |
700 | else | |
701 | ret = parse_single_column(columns[0], inc); | |
702 | if (ret != SR_OK) { | |
703 | g_strfreev(columns); | |
704 | return SR_ERR; | |
705 | } | |
706 | ||
707 | /* Send sample data to the session bus. */ | |
708 | ret = send_samples(in->sdi, inc->sample_buffer, | |
709 | inc->sample_buffer_size, 1); | |
710 | if (ret != SR_OK) { | |
711 | sr_err("Sending samples failed."); | |
712 | return SR_ERR; | |
713 | } | |
714 | g_strfreev(columns); | |
715 | } | |
716 | g_strfreev(lines); | |
717 | g_string_erase(in->buf, 0, p - in->buf->str + 1); | |
718 | ||
719 | return ret; | |
720 | } | |
721 | ||
722 | static int receive(struct sr_input *in, GString *buf) | |
723 | { | |
724 | struct context *inc; | |
725 | int ret; | |
726 | ||
727 | g_string_append_len(in->buf, buf->str, buf->len); | |
728 | ||
729 | inc = in->priv; | |
730 | if (!inc->termination) { | |
731 | if ((ret = initial_receive(in)) == SR_ERR_NA) | |
732 | /* Not enough data yet. */ | |
733 | return SR_OK; | |
734 | else if (ret != SR_OK) | |
735 | return SR_ERR; | |
736 | ||
737 | /* sdi is ready, notify frontend. */ | |
738 | in->sdi_ready = TRUE; | |
739 | return SR_OK; | |
740 | } | |
741 | ||
742 | ret = process_buffer(in); | |
743 | ||
744 | return ret; | |
745 | } | |
746 | ||
747 | static int end(struct sr_input *in) | |
748 | { | |
749 | struct context *inc; | |
750 | struct sr_datafeed_packet packet; | |
751 | int ret; | |
752 | ||
753 | if (in->sdi_ready) | |
754 | ret = process_buffer(in); | |
755 | else | |
756 | ret = SR_OK; | |
757 | ||
758 | inc = in->priv; | |
759 | if (inc->started) { | |
760 | /* End of stream. */ | |
761 | packet.type = SR_DF_END; | |
762 | sr_session_send(in->sdi, &packet); | |
763 | } | |
764 | ||
765 | return ret; | |
766 | } | |
767 | ||
768 | static void cleanup(struct sr_input *in) | |
769 | { | |
770 | struct context *inc; | |
771 | ||
772 | inc = in->priv; | |
773 | ||
774 | if (inc->delimiter) | |
775 | g_string_free(inc->delimiter, TRUE); | |
776 | ||
777 | if (inc->comment) | |
778 | g_string_free(inc->comment, TRUE); | |
779 | ||
780 | g_free(inc->termination); | |
781 | g_free(inc->sample_buffer); | |
782 | } | |
783 | ||
784 | static struct sr_option options[] = { | |
785 | { "single-column", "Single column", "Enable/specify single column", NULL, NULL }, | |
786 | { "numchannels", "Max channels", "Number of channels", NULL, NULL }, | |
787 | { "delimiter", "Delimiter", "Column delimiter", NULL, NULL }, | |
788 | { "format", "Format", "Numeric format", NULL, NULL }, | |
789 | { "comment", "Comment", "Comment prefix character", NULL, NULL }, | |
790 | { "samplerate", "Samplerate", "Samplerate used during capture", NULL, NULL }, | |
791 | { "first-channel", "First channel", "Column number of first channel", NULL, NULL }, | |
792 | { "header", "Header", "Treat first line as header with channel names", NULL, NULL }, | |
793 | { "startline", "Start line", "Line number at which to start processing samples", NULL, NULL }, | |
794 | ALL_ZERO | |
795 | }; | |
796 | ||
797 | static struct sr_option *get_options(void) | |
798 | { | |
799 | if (!options[0].def) { | |
800 | options[0].def = g_variant_ref_sink(g_variant_new_int32(0)); | |
801 | options[1].def = g_variant_ref_sink(g_variant_new_int32(0)); | |
802 | options[2].def = g_variant_ref_sink(g_variant_new_string(",")); | |
803 | options[3].def = g_variant_ref_sink(g_variant_new_string("bin")); | |
804 | options[4].def = g_variant_ref_sink(g_variant_new_string(";")); | |
805 | options[5].def = g_variant_ref_sink(g_variant_new_uint64(0)); | |
806 | options[6].def = g_variant_ref_sink(g_variant_new_int32(0)); | |
807 | options[7].def = g_variant_ref_sink(g_variant_new_boolean(FALSE)); | |
808 | options[8].def = g_variant_ref_sink(g_variant_new_int32(1)); | |
809 | } | |
810 | ||
811 | return options; | |
812 | } | |
813 | ||
814 | SR_PRIV struct sr_input_module input_csv = { | |
815 | .id = "csv", | |
816 | .name = "CSV", | |
817 | .desc = "Comma-separated values", | |
818 | .exts = (const char*[]){"csv", NULL}, | |
819 | .metadata = { SR_INPUT_META_MIMETYPE }, | |
820 | .options = get_options, | |
821 | .format_match = format_match, | |
822 | .init = init, | |
823 | .receive = receive, | |
824 | .end = end, | |
825 | .cleanup = cleanup, | |
826 | }; |