git.ozlabs.org Git - ccan/blob - ccan/crcsync/test/run-crash.c

   1 /* This used to crash us on 64-bit; submitted by
   2    Alex Wulms <alex.wulms@scarlet.be> */
   3 #include "crcsync/crcsync.h"
   4 #include "crcsync/crcsync.c"
   5 #include "tap/tap.h"
   6 #include <stdlib.h>
   7 #include <stdbool.h>
   8
   9 /* FIXME: ccanize. */
  10 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
  11
  12 typedef struct {
  13         int block_count;
  14         uint64_t *crcs;
  15 } crc_info_t;
  16
  17 static void crcblocks(crc_info_t *crc_info, char *data, int datalen, int blocksize)
  18 {
  19         crc_info->block_count = (datalen+blocksize-1)/blocksize;
  20         crc_info->crcs = malloc(sizeof(uint64_t)*(crc_info->block_count + 1));
  21         crc_of_blocks(data, datalen, blocksize, 60, crc_info->crcs);
  22 }
  23
  24 #define BLOCKSIZE 5
  25
  26 int main(int argc, char *argv[])
  27 {
  28         /* Divided into BLOCKSIZE blocks */
  29         char *data1 =
  30                 "abcde" "fghij" "klmno" "pqrst" "uvwxy" "z ABC"
  31                 "DEFGH" "IJKLM" "NOPQR" "STUVW" "XYZ 0" "12345" "6789";
  32         /* Divided into blocks that match. */
  33         char *data2 =
  34                 /* NO MATCH */
  35                 "acde"
  36                 /* MATCH */
  37                 "fghij" "klmno"
  38                 /* NO MATCH */
  39                 "pqr-a-very-long-test-that-differs-between-two-invokations-of-the-same-page-st"
  40                 /* MATCH */
  41                 "uvwxy" "z ABC" "DEFGH" "IJKLM" "NOPQR" "STUVW" "XYZ 0" "12345"
  42                 "6789"
  43                 /* NO MATCH */
  44                 "ab";
  45
  46         int expected[] = { 4,
  47                            -2, -3,
  48                            77,
  49                            -5, -6, -7, -8, -9, -10, -11, -12,
  50                            -13,
  51                            2 };
  52         crc_info_t crc_info1;
  53         struct crc_context *crcctx;
  54         long result;
  55         size_t ndigested;
  56         size_t offset = 0;
  57         size_t len2 = strlen(data2);
  58         size_t tailsize = strlen(data1) % BLOCKSIZE;
  59         int expected_i = 0;
  60
  61         plan_tests(ARRAY_SIZE(expected) + 2);
  62         crcblocks(&crc_info1, data1, strlen(data1), BLOCKSIZE);
  63
  64         crcctx = crc_context_new(BLOCKSIZE, 60, crc_info1.crcs, crc_info1.block_count,
  65                                  tailsize);
  66         while ( offset < len2)
  67         {
  68                 ndigested = crc_read_block(crcctx, &result, data2+offset, len2 - offset);
  69                 offset += ndigested;
  70                 if (result < 0)
  71                         /* Match. */
  72                         ok1(result == expected[expected_i++]);
  73                 else {
  74                         /* Literal. */
  75                         ok1(result <= expected[expected_i]);
  76                         expected[expected_i] -= result;
  77                         if (!expected[expected_i])
  78                                 expected_i++;
  79                 }
  80         }
  81
  82         while ((result = crc_read_flush(crcctx)) != 0) {
  83                 if (result < 0)
  84                         /* Match. */
  85                         ok1(result == expected[expected_i++]);
  86                 else {
  87                         /* Literal. */
  88                         ok1(result <= expected[expected_i]);
  89                         expected[expected_i] -= result;
  90                         if (!expected[expected_i])
  91                                 expected_i++;
  92                 }
  93         }
  94         ok1(expected_i == ARRAY_SIZE(expected));
  95
  96         return 0;
  97 }