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/*
* Copyright © 2012 Ran Benita <ran234@gmail.com>
* SPDX-License-Identifier: MIT
*/
#include "config.h"
#include <time.h>
#include "test.h"
#include "atom.h"
#define INTERN_LITERAL(table, literal) \
atom_intern(table, literal, sizeof(literal) - 1, true)
#define LOOKUP_LITERAL(table, literal) \
atom_intern(table, literal, sizeof(literal) - 1, false)
static void
random_string(char **str_out, size_t *len_out)
{
/* Keep this small, so collisions might happen. */
static const char random_chars[] = {
'a', 'b', 'c', 'd', 'e', 'f', 'g'
};
size_t len;
char *str;
len = rand() % 15;
str = malloc(len + 1);
assert(str);
for (size_t i = 0; i < len; i++)
str[i] = random_chars[rand() % ARRAY_SIZE(random_chars)];
/* Don't always terminate it; should work without. */
if (rand() % 2 == 0)
str[len] = '\0';
*str_out = str;
*len_out = len;
}
static void
test_random_strings(void)
{
struct atom_string {
xkb_atom_t atom;
char *string;
size_t len;
};
struct atom_table *table;
struct atom_string *arr;
int N;
xkb_atom_t atom;
const char *string;
table = atom_table_new();
assert(table);
N = 1 + rand() % 100000;
arr = calloc(N, sizeof(*arr));
assert(arr);
for (int i = 0; i < N; i++) {
random_string(&arr[i].string, &arr[i].len);
atom = atom_intern(table, arr[i].string, arr[i].len, false);
if (atom != XKB_ATOM_NONE) {
string = atom_text(table, atom);
assert(string);
if (arr[i].len != strlen(string) ||
strncmp(string, arr[i].string, arr[i].len) != 0) {
fprintf(stderr, "got a collision, but strings don't match!\n");
fprintf(stderr, "existing length %zu, string %s\n",
strlen(string), string);
fprintf(stderr, "new length %zu, string %.*s\n",
arr[i].len, (int) arr[i].len, arr[i].string);
assert(false);
}
/* OK, got a real collision. */
free(arr[i].string);
i--;
continue;
}
arr[i].atom = atom_intern(table, arr[i].string, arr[i].len, true);
if (arr[i].atom == XKB_ATOM_NONE) {
fprintf(stderr, "failed to intern! len: %zu, string: %.*s\n",
arr[i].len, (int) arr[i].len, arr[i].string);
assert(false);
}
}
for (int i = 0; i < N; i++) {
string = atom_text(table, arr[i].atom);
assert(string);
if (arr[i].len != strlen(string) ||
strncmp(string, arr[i].string, arr[i].len) != 0) {
fprintf(stderr, "looked-up string doesn't match!\n");
fprintf(stderr, "found length %zu, string %s\n",
strlen(string), string);
fprintf(stderr, "expected length %zu, string %.*s\n",
arr[i].len, (int) arr[i].len, arr[i].string);
/* Since this is random, we need to dump the failing data,
* so we might have some chance to reproduce. */
fprintf(stderr, "START dump of arr, N=%d\n", N);
for (int j = 0; j < N; j++) {
fprintf(stderr, "%u\t\t%zu\t\t%.*s\n", arr[i].atom,
arr[i].len, (int) arr[i].len, arr[i].string);
}
fprintf(stderr, "END\n");
assert(false);
}
}
for (int i = 0; i < N; i++)
free(arr[i].string);
free(arr);
atom_table_free(table);
}
/* CLI positional arguments:
* 1. Seed for the pseudo-random generator:
* - Leave it unset or set it to “-” to use current time.
* - Use an integer to set it explicitly.
*/
int
main(int argc, char *argv[])
{
struct atom_table *table;
xkb_atom_t atom1, atom2, atom3;
test_init();
/* Initialize pseudo-random generator with program arg or current time */
unsigned int seed;
if (argc >= 2 && !streq(argv[1], "-")) {
seed = (unsigned int) atoi(argv[1]);
} else {
seed = (unsigned int) time(NULL);
}
fprintf(stderr, "Seed for the pseudo-random generator: %u\n", seed);
srand(seed);
table = atom_table_new();
assert(table);
assert(atom_text(table, XKB_ATOM_NONE) == NULL);
assert(atom_intern(table, NULL, 0, false) == XKB_ATOM_NONE);
atom1 = INTERN_LITERAL(table, "hello");
assert(atom1 != XKB_ATOM_NONE);
assert(atom1 == LOOKUP_LITERAL(table, "hello"));
assert(streq(atom_text(table, atom1), "hello"));
atom2 = atom_intern(table, "hello", 3, true);
assert(atom2 != XKB_ATOM_NONE);
assert(atom1 != atom2);
assert(streq(atom_text(table, atom2), "hel"));
assert(LOOKUP_LITERAL(table, "hel") == atom2);
assert(LOOKUP_LITERAL(table, "hell") == XKB_ATOM_NONE);
assert(LOOKUP_LITERAL(table, "hello") == atom1);
atom3 = atom_intern(table, "", 0, true);
assert(atom3 != XKB_ATOM_NONE);
assert(LOOKUP_LITERAL(table, "") == atom3);
atom_table_free(table);
test_random_strings();
return 0;
}
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