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git.proxmox.com Git - mirror_frr.git/blob - lib/csv.c
2 * Copyright (C) 2013,2020 Cumulus Networks, Inc.
4 * This file is part of Quagga.
6 * Quagga is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * Quagga is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32 #include <sys/queue.h>
40 #define log_error(fmt, ...) \
43 fprintf(stderr, "%s:%d:%s(): " fmt, __FILE__, \
44 __LINE__, __func__, ##__VA_ARGS__); \
47 #define log_verbose(fmt, ...) \
50 fprintf(stderr, "%s:%d:%s(): " fmt, __FILE__, \
51 __LINE__, __func__, __VA_ARGS__); \
54 struct _csv_field_t_
{
55 TAILQ_ENTRY(_csv_field_t_
) next_field
;
60 struct _csv_record_t_
{
61 TAILQ_HEAD(, _csv_field_t_
) fields
;
62 TAILQ_ENTRY(_csv_record_t_
) next_record
;
68 TAILQ_HEAD(, _csv_record_t_
) records
;
77 int csvlen(csv_t
*csv
)
79 return (csv
->csv_len
);
82 csv_t
*csv_init(csv_t
*csv
, char *buf
, int buflen
)
85 csv
= malloc(sizeof(csv_t
));
87 log_error("CSV Malloc failed\n");
91 memset(csv
, 0, sizeof(csv_t
));
95 TAILQ_INIT(&(csv
->records
));
99 void csv_clean(csv_t
*csv
)
104 rec
= TAILQ_FIRST(&(csv
->records
));
105 while (rec
!= NULL
) {
106 rec_n
= TAILQ_NEXT(rec
, next_record
);
107 csv_remove_record(csv
, rec
);
112 void csv_free(csv_t
*csv
)
119 static void csv_init_record(csv_record_t
*record
)
121 TAILQ_INIT(&(record
->fields
));
125 csv_record_t
*csv_record_iter(csv_t
*csv
)
127 return (TAILQ_FIRST(&(csv
->records
)));
130 csv_record_t
*csv_record_iter_next(csv_record_t
*rec
)
134 return (TAILQ_NEXT(rec
, next_record
));
137 char *csv_field_iter(csv_record_t
*rec
, csv_field_t
**fld
)
141 *fld
= TAILQ_FIRST(&(rec
->fields
));
142 return ((*fld
)->field
);
145 char *csv_field_iter_next(csv_field_t
**fld
)
147 *fld
= TAILQ_NEXT(*fld
, next_field
);
148 if ((*fld
) == NULL
) {
151 return ((*fld
)->field
);
154 int csv_field_len(csv_field_t
*fld
)
157 return fld
->field_len
;
162 static void csv_decode_record(csv_record_t
*rec
)
164 char *curr
= rec
->record
;
168 field
= strpbrk(curr
, ",");
169 while (field
!= NULL
) {
170 fld
= malloc(sizeof(csv_field_t
));
172 TAILQ_INSERT_TAIL(&(rec
->fields
), fld
, next_field
);
174 fld
->field_len
= field
- curr
;
177 field
= strpbrk(curr
, ",");
179 field
= strstr(curr
, "\n");
183 fld
= malloc(sizeof(csv_field_t
));
186 fld
->field_len
= field
- curr
;
187 TAILQ_INSERT_TAIL(&(rec
->fields
), fld
, next_field
);
191 static csv_field_t
*csv_add_field_to_record(csv_t
*csv
, csv_record_t
*rec
,
195 char *str
= rec
->record
;
196 int rlen
= rec
->rec_len
;
197 int blen
= csv
->buflen
;
199 fld
= malloc(sizeof(csv_field_t
));
201 log_error("field malloc failed\n");
202 /* more cleanup needed */
205 TAILQ_INSERT_TAIL(&(rec
->fields
), fld
, next_field
);
206 fld
->field
= str
+ rlen
;
207 fld
->field_len
= snprintf((str
+ rlen
), (blen
- rlen
), "%s", col
);
208 rlen
+= fld
->field_len
;
213 csv_record_t
*csv_encode(csv_t
*csv
, int count
, ...)
217 char *buf
= csv
->buf
;
218 int len
= csv
->buflen
;
219 int pointer
= csv
->pointer
;
228 /* allocate sufficient buffer */
229 str
= (char *)malloc(csv
->buflen
);
231 log_error("field str malloc failed\n");
236 va_start(list
, count
);
237 rec
= malloc(sizeof(csv_record_t
));
239 log_error("record malloc failed\n");
245 csv_init_record(rec
);
247 TAILQ_INSERT_TAIL(&(csv
->records
), rec
, next_record
);
251 * Iterate through the fields passed as a variable list and add them
253 for (tempc
= 0; tempc
< count
; tempc
++) {
254 col
= va_arg(list
, char *);
255 fld
= csv_add_field_to_record(csv
, rec
, col
);
257 log_error("fld malloc failed\n");
258 csv_remove_record(csv
, rec
);
262 if (tempc
< (count
- 1)) {
263 rec
->rec_len
+= snprintf((str
+ rec
->rec_len
),
264 (len
- rec
->rec_len
), ",");
268 snprintf((str
+ rec
->rec_len
), (len
- rec
->rec_len
), "\n");
270 csv
->csv_len
+= rec
->rec_len
;
271 csv
->pointer
+= rec
->rec_len
;
275 int csv_num_records(csv_t
*csv
)
278 return csv
->num_recs
;
283 csv_record_t
*csv_encode_record(csv_t
*csv
, csv_record_t
*rec
, int count
, ...)
289 csv_field_t
*fld
= NULL
;
292 va_start(list
, count
);
293 str
= csv_field_iter(rec
, &fld
);
299 for (tempc
= 0; tempc
< count
; tempc
++) {
300 col
= va_arg(list
, char *);
301 for (i
= 0; i
< fld
->field_len
; i
++) {
304 str
= csv_field_iter_next(&fld
);
310 csv_record_t
*csv_append_record(csv_t
*csv
, csv_record_t
*rec
, int count
, ...)
314 int len
= csv
->buflen
, tlen
;
320 /* not only works with discrete bufs */
325 /* create a new rec */
326 rec
= calloc(1, sizeof(csv_record_t
));
328 log_error("record malloc failed\n");
331 csv_init_record(rec
);
332 rec
->record
= calloc(1, csv
->buflen
);
334 log_error("field str malloc failed\n");
338 csv_insert_record(csv
, rec
);
343 va_start(list
, count
);
345 if (rec
->rec_len
&& (str
[rec
->rec_len
- 1] == '\n'))
346 str
[rec
->rec_len
- 1] = ',';
349 * Iterate through the fields passed as a variable list and add them
352 for (tempc
= 0; tempc
< count
; tempc
++) {
353 col
= va_arg(list
, char *);
354 fld
= csv_add_field_to_record(csv
, rec
, col
);
356 log_error("fld malloc failed\n");
359 if (tempc
< (count
- 1)) {
360 rec
->rec_len
+= snprintf((str
+ rec
->rec_len
),
361 (len
- rec
->rec_len
), ",");
365 snprintf((str
+ rec
->rec_len
), (len
- rec
->rec_len
), "\n");
367 csv
->csv_len
+= (rec
->rec_len
- tlen
);
368 csv
->pointer
+= (rec
->rec_len
- tlen
);
372 int csv_serialize(csv_t
*csv
, char *msgbuf
, int msglen
)
380 rec
= csv_record_iter(csv
);
381 while (rec
!= NULL
) {
382 if ((offset
+ rec
->rec_len
) >= msglen
)
384 offset
+= sprintf(&msgbuf
[offset
], "%s", rec
->record
);
385 rec
= csv_record_iter_next(rec
);
391 void csv_clone_record(csv_t
*csv
, csv_record_t
*in_rec
, csv_record_t
**out_rec
)
396 /* first check if rec belongs to this csv */
397 if (!csv_is_record_valid(csv
, in_rec
)) {
398 log_error("rec not in this csv\n");
402 /* only works with csv with discrete bufs */
405 "un-supported for this csv type - single buf detected\n");
409 /* create a new rec */
410 rec
= calloc(1, sizeof(csv_record_t
));
412 log_error("record malloc failed\n");
415 csv_init_record(rec
);
416 curr
= calloc(1, csv
->buflen
);
418 log_error("field str malloc failed\n");
423 rec
->rec_len
= in_rec
->rec_len
;
424 strlcpy(rec
->record
, in_rec
->record
, csv
->buflen
);
426 /* decode record into fields */
427 csv_decode_record(rec
);
432 void csv_remove_record(csv_t
*csv
, csv_record_t
*rec
)
434 csv_field_t
*fld
= NULL
, *p_fld
;
436 /* first check if rec belongs to this csv */
437 if (!csv_is_record_valid(csv
, rec
)) {
438 log_error("rec not in this csv\n");
443 csv_field_iter(rec
, &fld
);
446 csv_field_iter_next(&fld
);
447 TAILQ_REMOVE(&(rec
->fields
), p_fld
, next_field
);
451 TAILQ_REMOVE(&(csv
->records
), rec
, next_record
);
454 csv
->csv_len
-= rec
->rec_len
;
455 csv
->pointer
-= rec
->rec_len
;
461 void csv_insert_record(csv_t
*csv
, csv_record_t
*rec
)
463 /* first check if rec already in csv */
464 if (csv_is_record_valid(csv
, rec
)) {
465 log_error("rec already in this csv\n");
469 /* we can only insert records if no buf was supplied during csv init */
472 "un-supported for this csv type - single buf detected\n");
476 /* do we go beyond the max buf set for this csv ?*/
477 if ((csv
->csv_len
+ rec
->rec_len
) > csv
->buflen
) {
478 log_error("cannot insert - exceeded buf size\n");
482 TAILQ_INSERT_TAIL(&(csv
->records
), rec
, next_record
);
484 csv
->csv_len
+= rec
->rec_len
;
485 csv
->pointer
+= rec
->rec_len
;
488 csv_record_t
*csv_concat_record(csv_t
*csv
, csv_record_t
*rec1
,
495 /* first check if rec1 and rec2 belong to this csv */
496 if (!csv_is_record_valid(csv
, rec1
)
497 || !csv_is_record_valid(csv
, rec2
)) {
498 log_error("rec1 and/or rec2 invalid\n");
502 /* we can only concat records if no buf was supplied during csv init */
505 "un-supported for this csv type - single buf detected\n");
509 /* create a new rec */
510 rec
= calloc(1, sizeof(csv_record_t
));
512 log_error("record malloc failed\n");
515 csv_init_record(rec
);
517 curr
= (char *)calloc(1, csv
->buflen
);
519 log_error("field str malloc failed\n");
524 /* concat the record string */
525 ret
= strstr(rec1
->record
, "\n");
527 log_error("rec1 str not properly formatted\n");
531 snprintf(curr
, (int)(ret
- rec1
->record
+ 1), "%s", rec1
->record
);
534 ret
= strstr(rec2
->record
, "\n");
536 log_error("rec2 str not properly formatted\n");
540 snprintf((curr
+ strlen(curr
)), (int)(ret
- rec2
->record
+ 1), "%s",
543 rec
->rec_len
= strlen(curr
);
547 > (csv
->csv_len
- rec1
->rec_len
- rec2
->rec_len
+ rec
->rec_len
));
549 /* decode record into fields */
550 csv_decode_record(rec
);
552 /* now remove rec1 and rec2 and insert rec into this csv */
553 csv_remove_record(csv
, rec1
);
554 csv_remove_record(csv
, rec2
);
555 csv_insert_record(csv
, rec
);
566 void csv_decode(csv_t
*csv
, char *inbuf
)
572 buf
= (inbuf
) ? inbuf
: csv
->buf
;
575 pos
= strpbrk(buf
, "\n");
576 while (pos
!= NULL
) {
577 rec
= calloc(1, sizeof(csv_record_t
));
580 csv_init_record(rec
);
581 TAILQ_INSERT_TAIL(&(csv
->records
), rec
, next_record
);
586 rec
->record
= calloc(1, csv
->buflen
);
588 log_error("field str malloc failed\n");
591 strncpy(rec
->record
, buf
, pos
- buf
+ 1);
593 rec
->rec_len
= pos
- buf
+ 1;
594 /* decode record into fields */
595 csv_decode_record(rec
);
597 pos
= strpbrk(buf
, "\n");
601 int csv_is_record_valid(csv_t
*csv
, csv_record_t
*in_rec
)
606 rec
= csv_record_iter(csv
);
612 rec
= csv_record_iter_next(rec
);
618 void csv_dump(csv_t
*csv
)
624 rec
= csv_record_iter(csv
);
625 while (rec
!= NULL
) {
626 str
= csv_field_iter(rec
, &fld
);
627 while (str
!= NULL
) {
628 fprintf(stderr
, "%s\n", str
);
629 str
= csv_field_iter_next(&fld
);
631 rec
= csv_record_iter_next(rec
);
637 static int get_memory_usage(pid_t pid
)
640 char buf
[4096], status_child
[PATH_MAX
];
643 snprintf(status_child
, sizeof(status_child
), "/proc/%d/status", pid
);
644 fd
= open(status_child
, O_RDONLY
);
654 vm
= strstr(buf
, "VmData:");
656 sscanf(vm
, "%*s %d", &data
);
658 vm
= strstr(buf
, "VmStk:");
660 sscanf(vm
, "%*s %d", &stack
);
672 char hdr1
[32], hdr2
[32];
674 log_verbose("Mem: %d\n", get_memory_usage(getpid()));
675 csv_init(&csv
, buf
, 256);
676 snprintf(hdr1
, sizeof(hdr1
), "%4d", 0);
677 snprintf(hdr2
, sizeof(hdr2
), "%4d", 1);
678 log_verbose("(%zu/%zu/%d/%d)\n", strlen(hdr1
), strlen(hdr2
), atoi(hdr1
),
680 rec
= csv_encode(&csv
, 2, hdr1
, hdr2
);
681 csv_encode(&csv
, 4, "name", "age", "sex", "hei");
682 csv_encode(&csv
, 3, NULL
, "0", NULL
);
683 csv_encode(&csv
, 2, "p", "35");
684 for (i
= 0; i
< 50; i
++) {
685 csv_encode(&csv
, 2, "p", "10");
687 csv_encode(&csv
, 2, "pdfadfadfadsadsaddfdfdsfdsd", "35444554545454545");
688 log_verbose("%s\n", buf
);
689 snprintf(hdr1
, sizeof(hdr1
), "%4d", csv
.csv_len
);
690 snprintf(hdr2
, sizeof(hdr2
), "%4d", 1);
691 log_verbose("(%zu/%zu/%d/%d)\n", strlen(hdr1
), strlen(hdr2
), atoi(hdr1
),
693 rec
= csv_encode_record(&csv
, rec
, 2, hdr1
, hdr2
);
694 log_verbose("(%d/%d)\n%s\n", rec
->rec_len
, csv
.csv_len
, buf
);
696 log_verbose("Mem: %d\n", get_memory_usage(getpid()));
698 log_verbose("Mem: %d\n", get_memory_usage(getpid()));
699 csv_init(&csv
, buf
, 256);
700 csv_decode(&csv
, NULL
);
701 log_verbose("%s", "AFTER DECODE\n");
704 log_verbose("Mem: %d\n", get_memory_usage(getpid()));