+/* This used to crash us on 64-bit; submitted by
+ Alex Wulms <alex.wulms@scarlet.be> */
+#include "crcsync/crcsync.h"
+#include "crcsync/crcsync.c"
+#include "tap/tap.h"
+#include <stdlib.h>
+#include <stdbool.h>
+
+/* FIXME: ccanize. */
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+typedef struct {
+ int block_count;
+ unsigned int *crcs;
+} crc_info_t;
+
+static void crcblocks(crc_info_t *crc_info, char *data, int datalen, int blocksize)
+{
+ crc_info->block_count = (datalen+blocksize-1)/blocksize;
+ crc_info->crcs = malloc(sizeof(unsigned int)*(crc_info->block_count + 1));
+ crc_of_blocks(data, datalen, blocksize, 30, crc_info->crcs);
+}
+
+#define BLOCKSIZE 5
+
+int main(int argc, char *argv[])
+{
+ /* Divided into BLOCKSIZE blocks */
+ char *data1 =
+ "abcde" "fghij" "klmno" "pqrst" "uvwxy" "z ABC"
+ "DEFGH" "IJKLM" "NOPQR" "STUVW" "XYZ 0" "12345" "6789";
+ /* Divided into blocks that match. */
+ char *data2 =
+ /* NO MATCH */
+ "acde"
+ /* MATCH */
+ "fghij" "klmno"
+ /* NO MATCH */
+ "pqr-a-very-long-test-that-differs-between-two-invokations-of-the-same-page-st"
+ /* MATCH */
+ "uvwxy" "z ABC" "DEFGH" "IJKLM" "NOPQR" "STUVW" "XYZ 0" "12345"
+ /* NO MATCH */
+ "6789ab";
+
+ int expected[] = { 4,
+ -2, -3,
+ 77,
+ -5, -6, -7, -8, -9, -10, -11, -12,
+ 6 };
+ crc_info_t crc_info1;
+ struct crc_context *crcctx;
+ long result;
+ size_t ndigested;
+ size_t offset = 0;
+ size_t len2 = strlen(data2);
+ int expected_i = 0;
+
+ plan_tests(ARRAY_SIZE(expected) + 2);
+ crcblocks(&crc_info1, data1, strlen(data1), BLOCKSIZE);
+
+ crcctx = crc_context_new(BLOCKSIZE, 30, crc_info1.crcs, crc_info1.block_count);
+ while ( offset < len2)
+ {
+ ndigested = crc_read_block(crcctx, &result, data2+offset, len2 - offset);
+ offset += ndigested;
+ if (result < 0)
+ /* Match. */
+ ok1(result == expected[expected_i++]);
+ else {
+ /* Literal. */
+ ok1(result <= expected[expected_i]);
+ expected[expected_i] -= result;
+ if (!expected[expected_i])
+ expected_i++;
+ }
+ }
+
+ while ((result = crc_read_flush(crcctx)) != 0) {
+ if (result < 0)
+ /* Match. */
+ ok1(result == expected[expected_i++]);
+ else {
+ /* Literal. */
+ ok1(result <= expected[expected_i]);
+ expected[expected_i] -= result;
+ if (!expected[expected_i])
+ expected_i++;
+ }
+ }
+ ok1(expected_i == ARRAY_SIZE(expected));
+
+ return 0;
+}