mirror of https://github.com/nextcloud/desktop
330 lines
10 KiB
C
330 lines
10 KiB
C
/*
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* Tests are taken form lookup2.c and lookup8.c
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* by Bob Jenkins, December 1996, Public Domain.
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*
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* See http://burtleburtle.net/bob/hash/evahash.html
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*/
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#include "torture.h"
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#include "common/c_jhash.h"
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#define HASHSTATE 1
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#define HASHLEN 1
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#define MAXPAIR 80
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#define MAXLEN 70
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static void check_c_jhash_trials(void **state)
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{
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uint8_t qa[MAXLEN+1], qb[MAXLEN+2], *a = &qa[0], *b = &qb[1];
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uint32_t c[HASHSTATE];
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uint32_t d[HASHSTATE];
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uint32_t i = 0;
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uint32_t j = 0;
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uint32_t k = 0;
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uint32_t l = 0;
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uint32_t m = 0;
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uint32_t z = 0;
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uint32_t e[HASHSTATE],f[HASHSTATE],g[HASHSTATE],h[HASHSTATE];
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uint32_t x[HASHSTATE],y[HASHSTATE];
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uint32_t hlen = 0;
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(void) state; /* unused */
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for (hlen=0; hlen < MAXLEN; ++hlen) {
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z=0;
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for (i=0; i<hlen; ++i) { /*----------------------- for each input byte, */
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for (j=0; j<8; ++j) { /*------------------------ for each input bit, */
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for (m=1; m<8; ++m) { /*------------ for several possible initvals, */
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for (l=0; l<HASHSTATE; ++l) e[l]=f[l]=g[l]=h[l]=x[l]=y[l]=~((uint32_t)0);
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/*---- check that every output bit is affected by that input bit */
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for (k=0; k<MAXPAIR; k+=2) {
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uint32_t finished=1;
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/* keys have one bit different */
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for (l=0; l<hlen+1; ++l) {a[l] = b[l] = (uint8_t)0;}
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/* have a and b be two keys differing in only one bit */
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a[i] ^= (k<<j);
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a[i] ^= (k>>(8-j));
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c[0] = c_jhash(a, hlen, m);
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b[i] ^= ((k+1)<<j);
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b[i] ^= ((k+1)>>(8-j));
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d[0] = c_jhash(b, hlen, m);
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/* check every bit is 1, 0, set, and not set at least once */
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for (l=0; l<HASHSTATE; ++l) {
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e[l] &= (c[l]^d[l]);
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f[l] &= ~(c[l]^d[l]);
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g[l] &= c[l];
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h[l] &= ~c[l];
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x[l] &= d[l];
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y[l] &= ~d[l];
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if (e[l]|f[l]|g[l]|h[l]|x[l]|y[l]) finished=0;
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}
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if (finished) break;
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}
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if (k>z) z=k;
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if (k==MAXPAIR) {
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print_error("Some bit didn't change: ");
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print_error("%.8x %.8x %.8x %.8x %.8x %.8x ",
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e[0], f[0], g[0], h[0], x[0], y[0]);
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print_error("i %d j %d m %d len %d\n",i,j,m,hlen);
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}
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if (z == MAXPAIR) {
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if (z < MAXPAIR) {
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assert_true(z < MAXPAIR);
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// print_error("%u trials needed, should be less than 40\n", z/2);
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return;
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}
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}
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}
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}
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}
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}
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}
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static void check_c_jhash_alignment_problems(void **state)
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{
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uint32_t test = 0;
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uint8_t buf[MAXLEN+20];
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uint8_t *b = NULL;
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uint32_t len = 0;
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uint8_t q[] = "This is the time for all good men to come to the aid of their country";
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uint8_t qq[] = "xThis is the time for all good men to come to the aid of their country";
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uint8_t qqq[] = "xxThis is the time for all good men to come to the aid of their country";
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uint8_t qqqq[] = "xxxThis is the time for all good men to come to the aid of their country";
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uint32_t h = 0;
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uint32_t i = 0;
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uint32_t j = 0;
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uint32_t ref = 0;
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uint32_t x = 0;
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uint32_t y = 0;
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(void) state; /* unused */
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test = c_jhash(q, sizeof(q)-1, (uint32_t)0);
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assert_true(test == c_jhash(qq+1, sizeof(q)-1, (uint32_t)0));
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assert_true(test == c_jhash(qq+1, sizeof(q)-1, (uint32_t)0));
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assert_true(test == c_jhash(qqq+2, sizeof(q)-1, (uint32_t)0));
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assert_true(test == c_jhash(qqqq+3, sizeof(q)-1, (uint32_t)0));
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for (h=0, b=buf+1; h<8; ++h, ++b) {
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for (i=0; i<MAXLEN; ++i) {
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len = i;
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for (j=0; j<i; ++j) *(b+j)=0;
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/* these should all be equal */
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ref = c_jhash(b, len, (uint32_t)1);
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*(b+i)=(uint8_t)~0;
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*(b-1)=(uint8_t)~0;
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x = c_jhash(b, len, (uint32_t)1);
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y = c_jhash(b, len, (uint32_t)1);
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assert_false((ref != x) || (ref != y));
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}
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}
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}
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static void check_c_jhash_null_strings(void **state)
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{
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uint8_t buf[1];
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uint32_t h = 0;
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uint32_t i = 0;
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uint32_t t = 0;
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(void) state; /* unused */
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buf[0] = ~0;
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for (i=0, h=0; i<8; ++i) {
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t = h;
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h = c_jhash(buf, (uint32_t)0, h);
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assert_false(t == h);
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// print_error("0-byte-string check failed: t = %.8x, h = %.8x", t, h);
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}
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}
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static void check_c_jhash64_trials(void **state)
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{
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uint8_t qa[MAXLEN + 1], qb[MAXLEN + 2];
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uint8_t *a = NULL, *b = NULL;
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uint64_t c[HASHSTATE];
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uint64_t d[HASHSTATE];
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uint64_t i = 0;
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uint64_t j=0;
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uint64_t k = 0;
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uint64_t l = 0;
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uint64_t m = 0;
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uint64_t z = 0;
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uint64_t e[HASHSTATE];
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uint64_t f[HASHSTATE];
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uint64_t g[HASHSTATE];
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uint64_t h[HASHSTATE];
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uint64_t x[HASHSTATE];
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uint64_t y[HASHSTATE];
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uint64_t hlen = 0;
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(void) state; /* unused */
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a = &qa[0];
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b = &qb[1];
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for (hlen=0; hlen < MAXLEN; ++hlen) {
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z=0;
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for (i=0; i<hlen; ++i) { /*----------------------- for each byte, */
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for (j=0; j<8; ++j) { /*------------------------ for each bit, */
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for (m=0; m<8; ++m) { /*-------- for several possible levels, */
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for (l=0; l<HASHSTATE; ++l) e[l]=f[l]=g[l]=h[l]=x[l]=y[l]=~((uint64_t)0);
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/*---- check that every input bit affects every output bit */
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for (k=0; k<MAXPAIR; k+=2) {
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uint64_t finished=1;
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/* keys have one bit different */
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for (l=0; l<hlen+1; ++l) {a[l] = b[l] = (uint8_t)0;}
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/* have a and b be two keys differing in only one bit */
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a[i] ^= (k<<j);
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a[i] ^= (k>>(8-j));
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c[0] = c_jhash64(a, hlen, m);
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b[i] ^= ((k+1)<<j);
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b[i] ^= ((k+1)>>(8-j));
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d[0] = c_jhash64(b, hlen, m);
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/* check every bit is 1, 0, set, and not set at least once */
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for (l=0; l<HASHSTATE; ++l)
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{
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e[l] &= (c[l]^d[l]);
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f[l] &= ~(c[l]^d[l]);
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g[l] &= c[l];
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h[l] &= ~c[l];
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x[l] &= d[l];
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y[l] &= ~d[l];
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if (e[l]|f[l]|g[l]|h[l]|x[l]|y[l]) finished=0;
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}
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if (finished) break;
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}
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if (k>z) z=k;
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if (k==MAXPAIR) {
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#if 0
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print_error("Some bit didn't change: ");
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print_error("%.8llx %.8llx %.8llx %.8llx %.8llx %.8llx ",
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(long long unsigned int) e[0],
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(long long unsigned int) f[0],
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(long long unsigned int) g[0],
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(long long unsigned int) h[0],
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(long long unsigned int) x[0],
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(long long unsigned int) y[0]);
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print_error("i %d j %d m %d len %d\n",
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(uint32_t)i,(uint32_t)j,(uint32_t)m,(uint32_t)hlen);
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#endif
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}
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if (z == MAXPAIR) {
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if (z < MAXPAIR) {
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#if 0
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print_error("%lu trials needed, should be less than 40", z/2);
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#endif
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assert_true(z < MAXPAIR);
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}
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return;
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}
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}
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}
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}
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}
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}
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static void check_c_jhash64_alignment_problems(void **state)
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{
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uint8_t buf[MAXLEN+20];
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uint8_t *b = NULL;
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uint64_t len = 0;
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uint8_t q[] = "This is the time for all good men to come to the aid of their country";
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uint8_t qq[] = "xThis is the time for all good men to come to the aid of their country";
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uint8_t qqq[] = "xxThis is the time for all good men to come to the aid of their country";
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uint8_t qqqq[] = "xxxThis is the time for all good men to come to the aid of their country";
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uint8_t o[] = "xxxxThis is the time for all good men to come to the aid of their country";
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uint8_t oo[] = "xxxxxThis is the time for all good men to come to the aid of their country";
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uint8_t ooo[] = "xxxxxxThis is the time for all good men to come to the aid of their country";
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uint8_t oooo[] = "xxxxxxxThis is the time for all good men to come to the aid of their country";
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uint64_t h = 0;
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uint64_t i = 0;
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uint64_t j = 0;
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uint64_t ref = 0;
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uint64_t t = 0;
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uint64_t x = 0;
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uint64_t y = 0;
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(void) state; /* unused */
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h = c_jhash64(q+0, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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t = h;
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(qq+1, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(qqq+2, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(qqqq+3, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(o+4, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(oo+5, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(ooo+6, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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h = c_jhash64(oooo+7, (uint64_t)(sizeof(q)-1), (uint64_t)0);
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assert_true(t == h);
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// , "%.8lx%.8lx\n", (uint32_t)h, (uint32_t)(h>>32));
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for (h=0, b=buf+1; h<8; ++h, ++b) {
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for (i=0; i<MAXLEN; ++i) {
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len = i;
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for (j=0; j<i; ++j) *(b+j)=0;
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/* these should all be equal */
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ref = c_jhash64(b, len, (uint64_t)1);
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*(b+i)=(uint8_t)~0;
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*(b-1)=(uint8_t)~0;
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x = c_jhash64(b, len, (uint64_t)1);
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y = c_jhash64(b, len, (uint64_t)1);
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assert_false((ref != x) || (ref != y));
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#if 0
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print_error("alignment error: %.8lx %.8lx %.8lx %ld %ld\n", ref, x, y, h, i);
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#endif
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}
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}
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}
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static void check_c_jhash64_null_strings(void **state)
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{
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uint8_t buf[1];
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uint64_t h = 0;
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uint64_t i = 0;
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uint64_t t = 0;
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(void) state; /* unused */
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buf[0] = ~0;
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for (i=0, h=0; i<8; ++i) {
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t = h;
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h = c_jhash64(buf, (uint64_t)0, h);
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assert_false(t == h);
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#if 0
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print_error("0-byte-string check failed: t = %.8lx, h = %.8lx", t, h);
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#endif
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}
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}
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int torture_run_tests(void)
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{
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const struct CMUnitTest tests[] = {
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cmocka_unit_test(check_c_jhash_trials),
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cmocka_unit_test(check_c_jhash_alignment_problems),
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cmocka_unit_test(check_c_jhash_null_strings),
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cmocka_unit_test(check_c_jhash64_trials),
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cmocka_unit_test(check_c_jhash64_alignment_problems),
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cmocka_unit_test(check_c_jhash64_null_strings),
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};
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return cmocka_run_group_tests(tests, NULL, NULL);
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}
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