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/*
* Circular buffer tests.
* Copyright (C) 2017 Cumulus Networks
* Quentin Young
*
* 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 2 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include <memory.h>
#include "ringbuf.h"
static void validate_state(struct ringbuf *buf, size_t size, size_t contains)
{
assert(buf->size == size);
assert(ringbuf_remain(buf) == contains);
assert(ringbuf_space(buf) == buf->size - contains);
assert(buf->empty != (bool)contains);
}
int main(int argc, char **argv)
{
struct ringbuf *soil = ringbuf_new(BUFSIZ);
validate_state(soil, BUFSIZ, 0);
/* verify reset functionality on clean buffer */
printf("Validating reset on empty buffer...\n");
ringbuf_reset(soil);
validate_state(soil, BUFSIZ, 0);
/* put one byte */
printf("Validating write...\n");
uint8_t walnut = 47;
assert(ringbuf_put(soil, &walnut, sizeof(walnut)) == 1);
validate_state(soil, BUFSIZ, 1);
/* validate read limitations */
printf("Validating read limits...\n");
uint8_t nuts[2];
assert(ringbuf_get(soil, &nuts, sizeof(nuts)) == 1);
/* reset */
printf("Validating reset on full buffer...\n");
ringbuf_reset(soil);
validate_state(soil, BUFSIZ, 0);
/* copy stack garbage to buffer */
printf("Validating big write...\n");
uint8_t compost[BUFSIZ];
assert(ringbuf_put(soil, &compost, sizeof(compost)) == BUFSIZ);
validate_state(soil, BUFSIZ, BUFSIZ);
assert(soil->start == 0);
assert(soil->end == 0);
/* read 15 bytes of garbage */
printf("Validating read...\n");
assert(ringbuf_get(soil, &compost, 15) == 15);
validate_state(soil, BUFSIZ, BUFSIZ - 15);
assert(soil->start == 15);
assert(soil->end == 0);
/* put another 10 bytes and validate wraparound */
printf("Validating wraparound...\n");
assert(ringbuf_put(soil, &compost[BUFSIZ/2], 10) == 10);
validate_state(soil, BUFSIZ, BUFSIZ - 15 + 10);
assert(soil->start == 15);
assert(soil->end == 10);
/* put another 15 bytes and validate state */
printf("Validating size limits...\n");
assert(ringbuf_put(soil, &compost, 15) == 5);
validate_state(soil, BUFSIZ, BUFSIZ);
/* read entire buffer */
printf("Validating big read...\n");
assert(ringbuf_get(soil, &compost, BUFSIZ) == BUFSIZ);
validate_state(soil, BUFSIZ, 0);
assert(soil->empty == true);
assert(soil->start == soil->end);
assert(soil->start == 15);
/* read empty buffer */
printf("Validating empty read...\n");
assert(ringbuf_get(soil, &compost, 1) == 0);
validate_state(soil, BUFSIZ, 0);
/* reset, validate state */
printf("Validating reset...\n");
ringbuf_reset(soil);
validate_state(soil, BUFSIZ, 0);
assert(soil->start == 0);
assert(soil->end == 0);
/* wipe, validate state */
printf("Validating wipe...\n");
memset(&compost, 0x00, sizeof(compost));
ringbuf_wipe(soil);
assert(memcmp(&compost, soil->data, sizeof(compost)) == 0);
/* validate maximum write */
printf("Validating very big write...\n");
const char flower[BUFSIZ * 2];
assert(ringbuf_put(soil, &flower, sizeof(flower)) == BUFSIZ);
validate_state(soil, BUFSIZ, BUFSIZ);
/* wipe, validate state */
printf("Validating wipe...\n");
memset(&compost, 0x00, sizeof(compost));
ringbuf_wipe(soil);
assert(memcmp(&compost, soil->data, sizeof(compost)) == 0);
/* validate simple data encode / decode */
const char *organ = "seed";
printf("Encoding: '%s'\n", organ);
assert(ringbuf_put(soil, organ, strlen(organ)) == 4);
char water[strlen(organ) + 1];
assert(ringbuf_get(soil, &water, strlen(organ)) == 4);
water[strlen(organ)] = '\0';
printf("Retrieved: '%s'\n", water);
validate_state(soil, BUFSIZ, 0);
/* validate simple data encode / decode across ring boundary */
soil->start = soil->size - 2;
soil->end = soil->start;
const char *phloem = "root";
printf("Encoding: '%s'\n", phloem);
assert(ringbuf_put(soil, phloem, strlen(phloem)) == 4);
char xylem[strlen(phloem) + 1];
assert(ringbuf_get(soil, &xylem, 100) == 4);
xylem[strlen(phloem)] = '\0';
printf("Retrieved: '%s'\n", xylem);
ringbuf_wipe(soil);
/* validate simple data peek across ring boundary */
soil->start = soil->size - 2;
soil->end = soil->start;
const char *cytoplasm = "tree";
printf("Encoding: '%s'\n", cytoplasm);
assert(ringbuf_put(soil, cytoplasm, strlen(cytoplasm)) == 4);
char chloroplast[strlen(cytoplasm) + 1];
assert(ringbuf_peek(soil, 2, &chloroplast[0], 100) == 2);
assert(ringbuf_peek(soil, 0, &chloroplast[2], 2) == 2);
chloroplast[strlen(cytoplasm)] = '\0';
assert(!strcmp(chloroplast, "eetr"));
printf("Retrieved: '%s'\n", chloroplast);
printf("Deleting...\n");
ringbuf_del(soil);
printf("Creating new buffer...\n");
soil = ringbuf_new(15);
soil->start = soil->end = 7;
/* validate data encode of excessive data */
const char *twenty = "vascular plants----";
char sixteen[16];
printf("Encoding: %s\n", twenty);
assert(ringbuf_put(soil, twenty, strlen(twenty)) == 15);
assert(ringbuf_get(soil, sixteen, 20));
sixteen[15] = '\0';
printf("Retrieved: %s\n", sixteen);
assert(!strcmp(sixteen, "vascular plants"));
printf("Deleting...\n");
ringbuf_del(soil);
printf("Done.\n");
return 0;
}
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