462 lines
16 KiB
C
462 lines
16 KiB
C
// data structures and utils: array, set, map, hash, sort.
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// - rlyeh, public domain
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// -----------------------------------------------------------------------------
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// sort
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API int sort_64(const void *a, const void *b);
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// -----------------------------------------------------------------------------
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// less
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API int less_64(uint64_t a, uint64_t b);
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API int less_int(int a, int b);
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API int less_ptr(void *a, void *b);
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API int less_str(char *a, char *b);
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// -----------------------------------------------------------------------------
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// un/hash
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API uint32_t unhash_32(uint32_t x);
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API uint32_t hash_32(uint32_t x);
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API uint64_t hash_64(uint64_t x);
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API uint64_t hash_flt(double x);
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API uint64_t hash_int(int key);
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API uint64_t hash_ptr(const void* ptr);
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API uint64_t hash_bin(const void* ptr, unsigned len);
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API uint64_t hash_str(const char* str);
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// -----------------------------------------------------------------------------
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// bits
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API uint64_t popcnt64(uint64_t x);
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// -----------------------------------------------------------------------------
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// vector based allocator (x1.75 enlarge factor)
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API void* vrealloc( void* p, size_t sz );
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API size_t vlen( void* p );
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// -----------------------------------------------------------------------------
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// arrays
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#if is(cpp)
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#define array_cast(x) (decltype x)
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#else
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#define array_cast(x) (void *)
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#endif
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#define array(t) t*
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#define array_init(t) ( (t) = 0 )
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#define array_resize(t, n) ( array_c_ = array_count(t), array_n_ = (n), array_realloc_((t),array_n_), (array_n_>array_c_? memset(array_c_+(t),0,(array_n_-array_c_)*sizeof(0[t])) : (void*)0), (t) )
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#define array_push(t, ...) ( array_realloc_((t),array_count(t)+1), (t)[ array_count(t) - 1 ] = (__VA_ARGS__) )
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#define array_pop(t) ( array_realloc_((t), array_count(t)-1) )
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#define array_back(t) ( &(t)[ array_count(t)-1 ] ) // ( (t) ? &(t)[ array_count(t)-1 ] : NULL )
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#define array_data(t) (t)
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#define array_at(t,i) (t[i])
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#define array_count(t) (int)( (t) ? array_vlen_(t) / sizeof(0[t]) : 0u )
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#define array_bytes(t) (int)( (t) ? array_vlen_(t) : 0u )
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#define array_sort(t, cmpfunc) qsort( t, array_count(t), sizeof(0[t]), (uintptr_t)cmpfunc == (uintptr_t)strcmp ? (void*)strcmp_qsort : (void*)cmpfunc )
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#define array_empty(t) ( !array_count(t) )
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#define array_push_front(arr,x) \
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(array_resize((arr), array_count(arr)+1), memmove((arr)+1, (arr), sizeof(0[arr])*array_count(arr)), 0[arr] = (x))
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#define array_pop_front(arr) ( \
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(array_count(arr) > 1 ? memmove((arr), (arr)+1, sizeof(0[arr])*(array_count(arr)-1)) : (void*)0), \
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(array_count(arr) > 0 ? array_resize(arr, array_count(arr) - 1 ) : array_resize( arr, 0 ) ) )
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static __thread unsigned array_c_;
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static __thread unsigned array_n_;
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#if 0 // original: no reserve support
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#define array_reserve(t, n) ((void)0) // not implemented
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#define array_clear(t) ( array_realloc_((t), 0), (t) = 0 )
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#define array_vlen_(t) ( vlen(t) - 0 )
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#define array_realloc_(t,n) ( (t) = array_cast(t) vrealloc((t), ((n)+0) * sizeof(0[t])) )
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#define array_free(t) array_clear(t)
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#else // new: with reserve support (bugs?)
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#define array_reserve(t, n) ( array_realloc_((t),(n)), array_clear(t) )
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#define array_clear(t) ( array_realloc_((t),0) ) // -1
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#define array_vlen_(t) ( vlen(t) - sizeof(0[t]) ) // -1
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#define array_realloc_(t,n) ( (t) = array_cast(t) vrealloc((t), ((n)+1) * sizeof(0[t])) ) // +1
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#define array_free(t) ( array_realloc_((t), -1), (t) = 0 ) // -1
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#endif
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#define array_reverse(t) \
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do if( array_count(t) ) { \
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for(int l = array_count(t), e = l-1, i = (array_push(t, 0[t]), 0); i <= e/2; ++i ) \
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{ l[t] = i[t]; i[t] = (e-i)[t]; (e-i)[t] = l[t]; } \
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array_pop(t); \
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} while(0)
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#define array_foreach(t,val_t,v) for each_array(t,val_t,v)
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#define each_array(t,val_t,v) \
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( int __it = 0, __end = array_count(t); __it < __end; ++__it ) \
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for( val_t v = __it[t], *on__ = &v; on__; on__ = 0 )
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#define array_foreach_ptr(t,val_t,v) for each_array_ptr(t,val_t,v)
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#define each_array_ptr(t,val_t,v) \
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( int __it = 0, __end = array_count(t); __it < __end; ++__it ) \
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for( val_t *v = (val_t*)&__it[t]; v; v = 0 )
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#define array_search(t, key, cmpfn) /* requires sorted array beforehand */ \
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bsearch(&key, t, array_count(t), sizeof(t[0]), cmpfn )
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#define array_insert(t, i, n) do { \
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int ac = array_count(t); \
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if( i >= ac ) { \
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array_push(t, n); \
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} else { \
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array_push(t, array_back(t)); \
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memmove( &(t)[(i)+1], &(t)[i], (ac - (i)) * sizeof(t[0]) ); \
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(t)[ i ] = (n); \
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} \
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} while(0)
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#define array_copy(t, src) do { /*todo: review old vrealloc call!*/ \
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array_free(t); \
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(t) = array_realloc_( (t), array_count(src)); \
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memcpy( (t), src, array_count(src) * sizeof(0[t])); \
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} while(0)
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#define array_swapback_and_pop(t, i) do { /*may alter ordering*/ \
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memmove( &(t)[i], &(t)[array_count(t) - 1], sizeof(0[t])); \
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array_pop(t); \
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} while(0)
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#define array_erase(t, i) do { \
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memmove( &(t)[i], &(t)[i + 1], sizeof(0[t])*(array_count(t) - i - 1)); \
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array_pop(t); \
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} while(0)
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#define array_unique(t, cmpfunc) do { /*@todo: optimize me. requires array_sort() beforehand*/ \
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int cnt = array_count(t), cnt_bak = cnt; \
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if( cnt > 1 ) { \
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for( int i = 1; i < cnt; ++i ) { \
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while( i < cnt && !cmpfunc(&(t)[i-1], &(t)[i]) ) { \
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memmove(&(t)[i-1], &(t)[i], (cnt - 1 - i) * sizeof((t)[0]) ) ; \
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--cnt; \
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} \
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} \
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if( cnt_bak != cnt ) array_resize((t), cnt); \
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} \
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} while(0)
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#if 0 // snippet below does work
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#define array_unique(t, cmpfunc) \
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array_sort(t, cmpfunc); \
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for( int i = 0, end = array_count(t) - 1; i < end; ) { \
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if( !strcmp(t[i], t[i+1]) ) { \
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/* array_erase(t, i+1); */ \
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memmove(&(t)[i+1], &(t)[i+2], (end - 1 - i) * sizeof((t)[0]) ); \
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array_pop(t); \
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--end; \
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} else { \
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++i; \
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} \
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}
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#endif
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#define array_shuffle(t) do { /* https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle */ \
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void* tmp = stack(sizeof(0[t])); \
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for( int i = 0, n = array_count(t); i < n; ++i ) { \
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int j = randi(i, n); /* j random integer such that [i,n) i<=j<n */ \
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memcpy(tmp, &j[t], sizeof(0[t])); \
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memcpy(&j[t], &i[t], sizeof(0[t])); \
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memcpy(&i[t], tmp, sizeof(0[t])); \
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} \
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} while(0)
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// -----------------------------------------------------------------------------
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// set<K>
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// ideas from: https://en.wikipedia.org/wiki/Hash_table
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// ideas from: https://probablydance.com/2017/02/26/i-wrote-the-fastest-hashtable/
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// ideas from: http://www.idryman.org/blog/2017/05/03/writing-a-damn-fast-hash-table-with-tiny-memory-footprints/
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// config
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#ifndef SET_HASHSIZE
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#define SET_HASHSIZE (4096 << 4)
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#endif
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#ifndef SET_DONT_ERASE
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#define SET_DONT_ERASE 1
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#endif
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// public api
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#define set(K) \
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struct { set base; struct { set_item p; K key; } tmp, *ptr; K *tmpval; \
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int (*typed_cmp)(K, K); uint64_t (*typed_hash)(K); } *
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#define set_init(m, cmpfn, hashfn) ( \
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(m) = set_cast(m) REALLOC(0, sizeof(*m)), \
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set_init(&(m)->base), \
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(m)->base.cmp = (int(*)(void*,void*))( (m)->typed_cmp = set_cast(cmpfn) cmpfn ), \
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(m)->base.hash = (uint64_t(*)(void*))( (m)->typed_hash = set_cast(hashfn) hashfn ) \
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)
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#define set_free(m) ( \
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set_clear(m), \
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set_free(&(m)->base), \
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(m) = set_cast(m) REALLOC((m), 0), \
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(m) = 0 \
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)
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#define set_insert(m, k) ( \
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(m)->ptr = set_cast((m)->ptr) REALLOC(0, sizeof((m)->tmp)), \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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set_insert(&(m)->base, &(m)->ptr->p, &(m)->ptr->key, (m)->ptr->p.keyhash, (m)->ptr), \
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&(m)->ptr->key \
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)
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#define set_find(m, k) ( \
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(m)->ptr = &(m)->tmp, \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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(m)->ptr = set_cast((m)->ptr) set_find(&(m)->base, &(m)->ptr->key, (m)->ptr->p.keyhash), \
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(m)->ptr ? &(m)->ptr->key : 0 \
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)
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#define set_find_or_add(m, k) ( \
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(m)->tmp.key = (k), \
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(m)->tmpval = set_find((m), ((m)->tmp.key)), \
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(m)->tmpval = (m)->tmpval ? (m)->tmpval : set_insert((m), ((m)->tmp.key)) \
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)
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#define set_find_or_add_allocated_key(m, k) ( \
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(m)->tmp.key = (k), \
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(m)->tmpval = set_find((m), ((m)->tmp.key)), \
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(m)->tmpval = (m)->tmpval ? FREE((m)->tmp.key), (m)->tmpval : set_insert((m), ((m)->tmp.key)) \
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)
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#define set_erase(m, k) ( \
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(m)->ptr = &(m)->tmp, \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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set_erase(&(m)->base, &(m)->ptr->key, (m)->ptr->p.keyhash) \
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)
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#define set_foreach for each_set
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#define each_set(m,key_t,k) \
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( int i_ = (m)->base.count ? 0 : SET_HASHSIZE; i_ < SET_HASHSIZE; ++i_) \
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for( set_item *cur_ = (m)->base.array[i_], *on_ = cur_; cur_; on_ = cur_ = cur_->next ) \
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for( key_t k = *(key_t *)cur_->key; on_; on_ = 0 )
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#define set_foreach_ptr for each_set_ptr
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#define each_set_ptr(m,key_t,k) \
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( int i_ = (m)->base.count ? 0 : SET_HASHSIZE; i_ < SET_HASHSIZE; ++i_) \
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for( set_item *cur_ = (m)->base.array[i_], *on_ = cur_; cur_; on_ = cur_ = cur_->next ) \
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for( key_t *k = (key_t *)cur_->key; on_; on_ = 0 )
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#define set_clear(m) ( \
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set_clear(&(m)->base) \
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)
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#define set_isempty(m) set_isempty(&(m)->base)
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#define set_count(m) set_count(&(m)->base)
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#define set_gc(m) set_gc(&(m)->base)
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#ifndef set_init_int
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#define set_init_int(m) set_init((m), less_int, hash_64) // hash_int)
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#define set_init_str(m) set_init((m), less_str, hash_str)
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#define set_init_ptr(m) set_init((m), less_ptr, hash_ptr)
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#endif
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// private:
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#if is(cpp)
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#define set_cast(t) (decltype(t))
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#else
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#define set_cast(t) (void *)
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#endif
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typedef struct set_item {
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struct set_item *next;
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uint64_t keyhash;
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void *key;
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void *super;
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} set_item;
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typedef struct set {
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array(set_item*) array;
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int (*cmp)(void *, void *);
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uint64_t (*hash)(void *);
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int count;
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} set;
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API void (set_init)(set *m);
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API void (set_free)(set *m);
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API void (set_insert)(set *m, set_item *p, void *key, uint64_t keyhash, void *super);
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API void (set_erase)(set *m, void *key, uint64_t keyhash);
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API void* (set_find)(const set *m, void *key, uint64_t keyhash);
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API int (set_isempty)(const set *m);
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API int (set_count)(const set *m);
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API void (set_gc)(set *m); // only if using SET_DONT_ERASE
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API void (set_clear)(set* m);
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// -----------------------------------------------------------------------------
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// map<K,V>
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// ideas from: https://en.wikipedia.org/wiki/Hash_table
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// ideas from: https://probablydance.com/2017/02/26/i-wrote-the-fastest-hashtable/
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// ideas from: http://www.idryman.org/blog/2017/05/03/writing-a-damn-fast-hash-table-with-tiny-memory-footprints/
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// config
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#ifndef MAP_HASHSIZE
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#define MAP_HASHSIZE (4096 << 4)
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#endif
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#ifndef MAP_DONT_ERASE
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#define MAP_DONT_ERASE 1
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#endif
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// public api
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#define map(K,V) \
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struct { map base; struct { pair p; K key; V val; } tmp, *ptr; V* tmpval; \
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int (*typed_cmp)(K, K); uint64_t (*typed_hash)(K); } *
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#define map_init(m, cmpfn, hashfn) ( \
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(m) = map_cast(m) REALLOC(0, sizeof(*(m))), \
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map_init(&(m)->base), \
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(m)->base.cmp = (int(*)(void*,void*))( (m)->typed_cmp = map_cast((m)->typed_cmp) cmpfn), \
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(m)->base.hash = (uint64_t(*)(void*))( (m)->typed_hash = map_cast((m)->typed_hash) hashfn ) \
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)
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#define map_free(m) ( \
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map_free(&(m)->base), \
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map_cast(m) REALLOC((m), sizeof(*(m))), (m) = 0 \
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)
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#define map_insert(m, k, v) ( \
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(m)->ptr = map_cast((m)->ptr) REALLOC(0, sizeof((m)->tmp)), \
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(m)->ptr->val = (v), \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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map_insert(&(m)->base, &(m)->ptr->p, &(m)->ptr->key, &(m)->ptr->val, (m)->ptr->p.keyhash, (m)->ptr), \
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&(m)->ptr->val \
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)
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#define map_find(m, k) ( \
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(m)->ptr = &(m)->tmp, \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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(m)->ptr = map_cast((m)->ptr) map_find(&(m)->base, &(m)->ptr->key, (m)->ptr->p.keyhash), \
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(m)->ptr ? &(m)->ptr->val : 0 \
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)
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#define map_find_or_add(m, k, v) ( \
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(m)->tmp.key = (k), (m)->tmp.val = (v), \
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(m)->tmpval = map_find((m), ((m)->tmp.key)), \
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(m)->tmpval = (m)->tmpval ? (m)->tmpval : map_insert((m), ((m)->tmp.key), ((m)->tmp.val)) \
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)
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#define map_find_or_add_allocated_key(m, k, v) ( \
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(m)->tmp.key = (k), (m)->tmp.val = (v), \
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(m)->tmpval = map_find((m), ((m)->tmp.key)), \
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(m)->tmpval = (m)->tmpval ? FREE((m)->tmp.key), (m)->tmpval : map_insert((m), ((m)->tmp.key), ((m)->tmp.val)) \
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)
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#define map_erase(m, k) ( \
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(m)->ptr = &(m)->tmp, \
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(m)->ptr->p.keyhash = (m)->typed_hash((m)->ptr->key = (k)), \
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map_erase(&(m)->base, &(m)->ptr->key, (m)->ptr->p.keyhash) \
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)
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#define map_foreach for each_map
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#define each_map(m,key_t,k,val_t,v) \
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( int i_ = (m)->base.count ? 0 : MAP_HASHSIZE; i_ < MAP_HASHSIZE; ++i_) \
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for( pair *cur_ = (m)->base.array[i_], *on_ = cur_; cur_; on_ = cur_ = cur_->next ) \
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for( key_t k = *(key_t *)cur_->key; on_; ) \
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for( val_t v = *(val_t *)cur_->value; on_; on_ = 0 )
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#define map_foreach_ptr for each_map_ptr
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#define each_map_ptr(m,key_t,k,val_t,v) \
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( int i_ = (m)->base.count ? 0 : MAP_HASHSIZE; i_ < MAP_HASHSIZE; ++i_) \
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for( pair *cur_ = (m)->base.array[i_], *on_ = cur_; cur_; on_ = cur_ = cur_->next ) \
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for( key_t *k = (key_t *)cur_->key; on_; ) \
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for( val_t *v = (val_t *)cur_->value; on_; on_ = 0 )
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#define map_foreach_ptr_sorted for each_map_ptr_sorted
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#define each_map_ptr_sorted(m,key_t,k,val_t,v) \
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( int i_ = (map_sort(&(m)->base), 0); i_ < array_count((m)->base.sorted); ++i_) \
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for( pair *cur_ = (m)->base.sorted[i_]; cur_; ) \
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for( key_t *k = (key_t *)cur_->key; cur_; ) \
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for( val_t *v = (val_t *)cur_->value; cur_; cur_ = 0 )
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#define map_clear(m) ( \
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map_clear(&(m)->base) \
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)
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#define map_isempty(m) map_isempty(&(m)->base)
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#define map_count(m) map_count(&(m)->base)
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#define map_gc(m) map_gc(&(m)->base)
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// aliases:
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|
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#ifndef map_init_int
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#define map_init_int(m) map_init((m), less_int, hash_64) // hash_int
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#define map_init_str(m) map_init((m), less_str, hash_str)
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#define map_init_ptr(m) map_init((m), less_ptr, hash_ptr)
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|
#endif
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// private:
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|
|
|
#if is(cpp)
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|
#define map_cast(t) (decltype(t))
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|
#else
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|
#define map_cast(t) (void *)
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|
#endif
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typedef struct pair {
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|
struct pair *next;
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|
|
|
uint64_t keyhash;
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|
void *key;
|
|
void *value;
|
|
void *super;
|
|
} pair;
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|
|
|
typedef struct map {
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|
array(pair*) array;
|
|
int (*cmp)(void *, void *);
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|
uint64_t (*hash)(void *);
|
|
int count:31;
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|
|
|
int is_sorted:1;
|
|
array(pair*) sorted;
|
|
} map;
|
|
|
|
API void (map_init)(map *m);
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|
API void (map_free)(map *m);
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|
|
|
API void (map_insert)(map *m, pair *p, void *key, void *value, uint64_t keyhash, void *super);
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|
API void (map_erase)(map *m, void *key, uint64_t keyhash);
|
|
API void* (map_find)(map *m, void *key, uint64_t keyhash);
|
|
API int (map_isempty)(map *m);
|
|
API int (map_count)(map *m);
|
|
API void (map_gc)(map *m); // only if using MAP_DONT_ERASE
|
|
API bool (map_sort)(map* m);
|
|
API void (map_clear)(map* m);
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// compile-time fourcc, eightcc
|
|
|
|
API char *cc4str(unsigned cc);
|
|
API char *cc8str(uint64_t cc);
|
|
|
|
enum {
|
|
# define _(a,b,c,d,e) cc__##a, cc__##b, cc__##c, cc__##d, cc__##e
|
|
cc__1 = '1', _(2,3,4,5,6),_(7,8,9,0,_), cc__ = ' ',
|
|
cc__A = 'A', _(B,C,D,E,F),_(G,H,I,J,K),_(L,M,N,O,P),_(Q,R,S,T,U),_(V,W,X,Y,Z),
|
|
cc__a = 'a', _(b,c,d,e,f),_(g,h,i,j,k),_(l,m,n,o,p),_(q,r,s,t,u),_(v,w,x,y,z),
|
|
# undef _
|
|
};
|
|
|
|
#ifdef BIG
|
|
#define cc4(a,b,c,d) ((uint32_t)(cc__##a<<24) | (cc__##b<<16) | (cc__##c<<8) | (cc__##d<<0))
|
|
#define cc8(a,b,c,d,e,f,g,h) (((uint64_t)cc4(a,b,c,d) << 32ULL) | cc4(e,f,g,h))
|
|
#else
|
|
#define cc4(a,b,c,d) ((uint32_t)(cc__##d<<24) | (cc__##c<<16) | (cc__##b<<8) | (cc__##a<<0))
|
|
#define cc8(a,b,c,d,e,f,g,h) (((uint64_t)cc4(e,f,g,h) << 32ULL) | cc4(a,b,c,d))
|
|
#endif
|
|
|
|
#define cc3(a,b,c) cc4(,a,b,c)
|
|
#define cc5(a,b,c,d,e) cc6(,a,b,c,d,e)
|
|
#define cc6(a,b,c,d,e,f) cc7(,a,b,c,d,e,f)
|
|
#define cc7(a,b,c,d,e,f,g) cc8(,a,b,c,d,e,f,g)
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|
|