--- /dev/null
+/* stb_ds.h - v0.67 - public domain data structures - Sean Barrett 2019
+
+ This is a single-header-file library that provides easy-to-use
+ dynamic arrays and hash tables for C (also works in C++).
+
+ For a gentle introduction:
+ http://nothings.org/stb_ds
+
+ To use this library, do this in *one* C or C++ file:
+ #define STB_DS_IMPLEMENTATION
+ #include "stb_ds.h"
+
+TABLE OF CONTENTS
+
+ Table of Contents
+ Compile-time options
+ License
+ Documentation
+ Notes
+ Notes - Dynamic arrays
+ Notes - Hash maps
+ Credits
+
+COMPILE-TIME OPTIONS
+
+ #define STBDS_NO_SHORT_NAMES
+
+ This flag needs to be set globally.
+
+ By default stb_ds exposes shorter function names that are not qualified
+ with the "stbds_" prefix. If these names conflict with the names in your
+ code, define this flag.
+
+ #define STBDS_SIPHASH_2_4
+
+ This flag only needs to be set in the file containing #define STB_DS_IMPLEMENTATION.
+
+ By default stb_ds.h hashes using a weaker variant of SipHash and a custom hash for
+ 4- and 8-byte keys. On 64-bit platforms, you can define the above flag to force
+ stb_ds.h to use specification-compliant SipHash-2-4 for all keys. Doing so makes
+ hash table insertion about 20% slower on 4- and 8-byte keys, 5% slower on
+ 64-byte keys, and 10% slower on 256-byte keys on my test computer.
+
+ #define STBDS_REALLOC(context,ptr,size) better_realloc
+ #define STBDS_FREE(context,ptr) better_free
+
+ These defines only need to be set in the file containing #define STB_DS_IMPLEMENTATION.
+
+ By default stb_ds uses stdlib realloc() and free() for memory management. You can
+ substitute your own functions instead by defining these symbols. You must either
+ define both, or neither. Note that at the moment, 'context' will always be NULL.
+ @TODO add an array/hash initialization function that takes a memory context pointer.
+
+ #define STBDS_UNIT_TESTS
+
+ Defines a function stbds_unit_tests() that checks the functioning of the data structures.
+
+ Note that on older versions of gcc (e.g. 5.x.x) you may need to build with '-std=c++0x'
+ (or equivalentally '-std=c++11') when using anonymous structures as seen on the web
+ page or in STBDS_UNIT_TESTS.
+
+LICENSE
+
+ Placed in the public domain and also MIT licensed.
+ See end of file for detailed license information.
+
+DOCUMENTATION
+
+ Dynamic Arrays
+
+ Non-function interface:
+
+ Declare an empty dynamic array of type T
+ T* foo = NULL;
+
+ Access the i'th item of a dynamic array 'foo' of type T, T* foo:
+ foo[i]
+
+ Functions (actually macros)
+
+ arrfree:
+ void arrfree(T*);
+ Frees the array.
+
+ arrlen:
+ ptrdiff_t arrlen(T*);
+ Returns the number of elements in the array.
+
+ arrlenu:
+ size_t arrlenu(T*);
+ Returns the number of elements in the array as an unsigned type.
+
+ arrpop:
+ T arrpop(T* a)
+ Removes the final element of the array and returns it.
+
+ arrput:
+ T arrput(T* a, T b);
+ Appends the item b to the end of array a. Returns b.
+
+ arrins:
+ T arrins(T* a, int p, T b);
+ Inserts the item b into the middle of array a, into a[p],
+ moving the rest of the array over. Returns b.
+
+ arrinsn:
+ void arrinsn(T* a, int p, int n);
+ Inserts n uninitialized items into array a starting at a[p],
+ moving the rest of the array over.
+
+ arraddnptr:
+ T* arraddnptr(T* a, int n)
+ Appends n uninitialized items onto array at the end.
+ Returns a pointer to the first uninitialized item added.
+
+ arraddnindex:
+ size_t arraddnindex(T* a, int n)
+ Appends n uninitialized items onto array at the end.
+ Returns the index of the first uninitialized item added.
+
+ arrdel:
+ void arrdel(T* a, int p);
+ Deletes the element at a[p], moving the rest of the array over.
+
+ arrdeln:
+ void arrdeln(T* a, int p, int n);
+ Deletes n elements starting at a[p], moving the rest of the array over.
+
+ arrdelswap:
+ void arrdelswap(T* a, int p);
+ Deletes the element at a[p], replacing it with the element from
+ the end of the array. O(1) performance.
+
+ arrsetlen:
+ void arrsetlen(T* a, int n);
+ Changes the length of the array to n. Allocates uninitialized
+ slots at the end if necessary.
+
+ arrsetcap:
+ size_t arrsetcap(T* a, int n);
+ Sets the length of allocated storage to at least n. It will not
+ change the length of the array.
+
+ arrcap:
+ size_t arrcap(T* a);
+ Returns the number of total elements the array can contain without
+ needing to be reallocated.
+
+ Hash maps & String hash maps
+
+ Given T is a structure type: struct { TK key; TV value; }. Note that some
+ functions do not require TV value and can have other fields. For string
+ hash maps, TK must be 'char *'.
+
+ Special interface:
+
+ stbds_rand_seed:
+ void stbds_rand_seed(size_t seed);
+ For security against adversarially chosen data, you should seed the
+ library with a strong random number. Or at least seed it with time().
+
+ stbds_hash_string:
+ size_t stbds_hash_string(char *str, size_t seed);
+ Returns a hash value for a string.
+
+ stbds_hash_bytes:
+ size_t stbds_hash_bytes(void *p, size_t len, size_t seed);
+ These functions hash an arbitrary number of bytes. The function
+ uses a custom hash for 4- and 8-byte data, and a weakened version
+ of SipHash for everything else. On 64-bit platforms you can get
+ specification-compliant SipHash-2-4 on all data by defining
+ STBDS_SIPHASH_2_4, at a significant cost in speed.
+
+ Non-function interface:
+
+ Declare an empty hash map of type T
+ T* foo = NULL;
+
+ Access the i'th entry in a hash table T* foo:
+ foo[i]
+
+ Function interface (actually macros):
+
+ hmfree
+ shfree
+ void hmfree(T*);
+ void shfree(T*);
+ Frees the hashmap and sets the pointer to NULL.
+
+ hmlen
+ shlen
+ ptrdiff_t hmlen(T*)
+ ptrdiff_t shlen(T*)
+ Returns the number of elements in the hashmap.
+
+ hmlenu
+ shlenu
+ size_t hmlenu(T*)
+ size_t shlenu(T*)
+ Returns the number of elements in the hashmap.
+
+ hmgeti
+ shgeti
+ hmgeti_ts
+ ptrdiff_t hmgeti(T*, TK key)
+ ptrdiff_t shgeti(T*, char* key)
+ ptrdiff_t hmgeti_ts(T*, TK key, ptrdiff_t tempvar)
+ Returns the index in the hashmap which has the key 'key', or -1
+ if the key is not present.
+
+ hmget
+ hmget_ts
+ shget
+ TV hmget(T*, TK key)
+ TV shget(T*, char* key)
+ TV hmget_ts(T*, TK key, ptrdiff_t tempvar)
+ Returns the value corresponding to 'key' in the hashmap.
+ The structure must have a 'value' field
+
+ hmgets
+ shgets
+ T hmgets(T*, TK key)
+ T shgets(T*, char* key)
+ Returns the structure corresponding to 'key' in the hashmap.
+
+ hmgetp
+ shgetp
+ hmgetp_ts
+ hmgetp_null
+ shgetp_null
+ T* hmgetp(T*, TK key)
+ T* shgetp(T*, char* key)
+ T* hmgetp_ts(T*, TK key, ptrdiff_t tempvar)
+ T* hmgetp_null(T*, TK key)
+ T* shgetp_null(T*, char *key)
+ Returns a pointer to the structure corresponding to 'key' in
+ the hashmap. Functions ending in "_null" return NULL if the key
+ is not present in the hashmap; the others return a pointer to a
+ structure holding the default value (but not the searched-for key).
+
+ hmdefault
+ shdefault
+ TV hmdefault(T*, TV value)
+ TV shdefault(T*, TV value)
+ Sets the default value for the hashmap, the value which will be
+ returned by hmget/shget if the key is not present.
+
+ hmdefaults
+ shdefaults
+ TV hmdefaults(T*, T item)
+ TV shdefaults(T*, T item)
+ Sets the default struct for the hashmap, the contents which will be
+ returned by hmgets/shgets if the key is not present.
+
+ hmput
+ shput
+ TV hmput(T*, TK key, TV value)
+ TV shput(T*, char* key, TV value)
+ Inserts a <key,value> pair into the hashmap. If the key is already
+ present in the hashmap, updates its value.
+
+ hmputs
+ shputs
+ T hmputs(T*, T item)
+ T shputs(T*, T item)
+ Inserts a struct with T.key into the hashmap. If the struct is already
+ present in the hashmap, updates it.
+
+ hmdel
+ shdel
+ int hmdel(T*, TK key)
+ int shdel(T*, char* key)
+ If 'key' is in the hashmap, deletes its entry and returns 1.
+ Otherwise returns 0.
+
+ Function interface (actually macros) for strings only:
+
+ sh_new_strdup
+ void sh_new_strdup(T*);
+ Overwrites the existing pointer with a newly allocated
+ string hashmap which will automatically allocate and free
+ each string key using realloc/free
+
+ sh_new_arena
+ void sh_new_arena(T*);
+ Overwrites the existing pointer with a newly allocated
+ string hashmap which will automatically allocate each string
+ key to a string arena. Every string key ever used by this
+ hash table remains in the arena until the arena is freed.
+ Additionally, any key which is deleted and reinserted will
+ be allocated multiple times in the string arena.
+
+NOTES
+
+ * These data structures are realloc'd when they grow, and the macro
+ "functions" write to the provided pointer. This means: (a) the pointer
+ must be an lvalue, and (b) the pointer to the data structure is not
+ stable, and you must maintain it the same as you would a realloc'd
+ pointer. For example, if you pass a pointer to a dynamic array to a
+ function which updates it, the function must return back the new
+ pointer to the caller. This is the price of trying to do this in C.
+
+ * The following are the only functions that are thread-safe on a single data
+ structure, i.e. can be run in multiple threads simultaneously on the same
+ data structure
+ hmlen shlen
+ hmlenu shlenu
+ hmget_ts shget_ts
+ hmgeti_ts shgeti_ts
+ hmgets_ts shgets_ts
+
+ * You iterate over the contents of a dynamic array and a hashmap in exactly
+ the same way, using arrlen/hmlen/shlen:
+
+ for (i=0; i < arrlen(foo); ++i)
+ ... foo[i] ...
+
+ * All operations except arrins/arrdel are O(1) amortized, but individual
+ operations can be slow, so these data structures may not be suitable
+ for real time use. Dynamic arrays double in capacity as needed, so
+ elements are copied an average of once. Hash tables double/halve
+ their size as needed, with appropriate hysteresis to maintain O(1)
+ performance.
+
+NOTES - DYNAMIC ARRAY
+
+ * If you know how long a dynamic array is going to be in advance, you can avoid
+ extra memory allocations by using arrsetlen to allocate it to that length in
+ advance and use foo[n] while filling it out, or arrsetcap to allocate the memory
+ for that length and use arrput/arrpush as normal.
+
+ * Unlike some other versions of the dynamic array, this version should
+ be safe to use with strict-aliasing optimizations.
+
+NOTES - HASH MAP
+
+ * For compilers other than GCC and clang (e.g. Visual Studio), for hmput/hmget/hmdel
+ and variants, the key must be an lvalue (so the macro can take the address of it).
+ Extensions are used that eliminate this requirement if you're using C99 and later
+ in GCC or clang, or if you're using C++ in GCC. But note that this can make your
+ code less portable.
+
+ * To test for presence of a key in a hashmap, just do 'hmgeti(foo,key) >= 0'.
+
+ * The iteration order of your data in the hashmap is determined solely by the
+ order of insertions and deletions. In particular, if you never delete, new
+ keys are always added at the end of the array. This will be consistent
+ across all platforms and versions of the library. However, you should not
+ attempt to serialize the internal hash table, as the hash is not consistent
+ between different platforms, and may change with future versions of the library.
+
+ * Use sh_new_arena() for string hashmaps that you never delete from. Initialize
+ with NULL if you're managing the memory for your strings, or your strings are
+ never freed (at least until the hashmap is freed). Otherwise, use sh_new_strdup().
+ @TODO: make an arena variant that garbage collects the strings with a trivial
+ copy collector into a new arena whenever the table shrinks / rebuilds. Since
+ current arena recommendation is to only use arena if it never deletes, then
+ this can just replace current arena implementation.
+
+ * If adversarial input is a serious concern and you're on a 64-bit platform,
+ enable STBDS_SIPHASH_2_4 (see the 'Compile-time options' section), and pass
+ a strong random number to stbds_rand_seed.
+
+ * The default value for the hash table is stored in foo[-1], so if you
+ use code like 'hmget(T,k)->value = 5' you can accidentally overwrite
+ the value stored by hmdefault if 'k' is not present.
+
+CREDITS
+
+ Sean Barrett -- library, idea for dynamic array API/implementation
+ Per Vognsen -- idea for hash table API/implementation
+ Rafael Sachetto -- arrpop()
+ github:HeroicKatora -- arraddn() reworking
+
+ Bugfixes:
+ Andy Durdin
+ Shane Liesegang
+ Vinh Truong
+ Andreas Molzer
+ github:hashitaku
+ github:srdjanstipic
+ Macoy Madson
+ Andreas Vennstrom
+ Tobias Mansfield-Williams
+*/
+
+#ifdef STBDS_UNIT_TESTS
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#ifndef INCLUDE_STB_DS_H
+#define INCLUDE_STB_DS_H
+
+#include <stddef.h>
+#include <string.h>
+
+#ifndef STBDS_NO_SHORT_NAMES
+#define arrlen stbds_arrlen
+#define arrlenu stbds_arrlenu
+#define arrput stbds_arrput
+#define arrpush stbds_arrput
+#define arrpop stbds_arrpop
+#define arrfree stbds_arrfree
+#define arraddn stbds_arraddn // deprecated, use one of the following instead:
+#define arraddnptr stbds_arraddnptr
+#define arraddnindex stbds_arraddnindex
+#define arrsetlen stbds_arrsetlen
+#define arrlast stbds_arrlast
+#define arrins stbds_arrins
+#define arrinsn stbds_arrinsn
+#define arrdel stbds_arrdel
+#define arrdeln stbds_arrdeln
+#define arrdelswap stbds_arrdelswap
+#define arrcap stbds_arrcap
+#define arrsetcap stbds_arrsetcap
+
+#define hmput stbds_hmput
+#define hmputs stbds_hmputs
+#define hmget stbds_hmget
+#define hmget_ts stbds_hmget_ts
+#define hmgets stbds_hmgets
+#define hmgetp stbds_hmgetp
+#define hmgetp_ts stbds_hmgetp_ts
+#define hmgetp_null stbds_hmgetp_null
+#define hmgeti stbds_hmgeti
+#define hmgeti_ts stbds_hmgeti_ts
+#define hmdel stbds_hmdel
+#define hmlen stbds_hmlen
+#define hmlenu stbds_hmlenu
+#define hmfree stbds_hmfree
+#define hmdefault stbds_hmdefault
+#define hmdefaults stbds_hmdefaults
+
+#define shput stbds_shput
+#define shputi stbds_shputi
+#define shputs stbds_shputs
+#define shget stbds_shget
+#define shgeti stbds_shgeti
+#define shgets stbds_shgets
+#define shgetp stbds_shgetp
+#define shgetp_null stbds_shgetp_null
+#define shdel stbds_shdel
+#define shlen stbds_shlen
+#define shlenu stbds_shlenu
+#define shfree stbds_shfree
+#define shdefault stbds_shdefault
+#define shdefaults stbds_shdefaults
+#define sh_new_arena stbds_sh_new_arena
+#define sh_new_strdup stbds_sh_new_strdup
+
+#define stralloc stbds_stralloc
+#define strreset stbds_strreset
+#endif
+
+#if defined(STBDS_REALLOC) && !defined(STBDS_FREE) || !defined(STBDS_REALLOC) && defined(STBDS_FREE)
+#error "You must define both STBDS_REALLOC and STBDS_FREE, or neither."
+#endif
+#if !defined(STBDS_REALLOC) && !defined(STBDS_FREE)
+#include <stdlib.h>
+#define STBDS_REALLOC(c,p,s) realloc(p,s)
+#define STBDS_FREE(c,p) free(p)
+#endif
+
+#ifdef _MSC_VER
+#define STBDS_NOTUSED(v) (void)(v)
+#else
+#define STBDS_NOTUSED(v) (void)sizeof(v)
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// for security against attackers, seed the library with a random number, at least time() but stronger is better
+extern void stbds_rand_seed(size_t seed);
+
+// these are the hash functions used internally if you want to test them or use them for other purposes
+extern size_t stbds_hash_bytes(void *p, size_t len, size_t seed);
+extern size_t stbds_hash_string(char *str, size_t seed);
+
+// this is a simple string arena allocator, initialize with e.g. 'stbds_string_arena my_arena={0}'.
+typedef struct stbds_string_arena stbds_string_arena;
+extern char * stbds_stralloc(stbds_string_arena *a, char *str);
+extern void stbds_strreset(stbds_string_arena *a);
+
+// have to #define STBDS_UNIT_TESTS to call this
+extern void stbds_unit_tests(void);
+
+///////////////
+//
+// Everything below here is implementation details
+//
+
+extern void * stbds_arrgrowf(void *a, size_t elemsize, size_t addlen, size_t min_cap);
+extern void stbds_arrfreef(void *a);
+extern void stbds_hmfree_func(void *p, size_t elemsize);
+extern void * stbds_hmget_key(void *a, size_t elemsize, void *key, size_t keysize, int mode);
+extern void * stbds_hmget_key_ts(void *a, size_t elemsize, void *key, size_t keysize, ptrdiff_t *temp, int mode);
+extern void * stbds_hmput_default(void *a, size_t elemsize);
+extern void * stbds_hmput_key(void *a, size_t elemsize, void *key, size_t keysize, int mode);
+extern void * stbds_hmdel_key(void *a, size_t elemsize, void *key, size_t keysize, size_t keyoffset, int mode);
+extern void * stbds_shmode_func(size_t elemsize, int mode);
+
+#ifdef __cplusplus
+}
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define STBDS_HAS_TYPEOF
+#ifdef __cplusplus
+//#define STBDS_HAS_LITERAL_ARRAY // this is currently broken for clang
+#endif
+#endif
+
+#if !defined(__cplusplus)
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#define STBDS_HAS_LITERAL_ARRAY
+#endif
+#endif
+
+// this macro takes the address of the argument, but on gcc/clang can accept rvalues
+#if defined(STBDS_HAS_LITERAL_ARRAY) && defined(STBDS_HAS_TYPEOF)
+ #if __clang__
+ #define STBDS_ADDRESSOF(typevar, value) ((__typeof__(typevar)[1]){value}) // literal array decays to pointer to value
+ #else
+ #define STBDS_ADDRESSOF(typevar, value) ((typeof(typevar)[1]){value}) // literal array decays to pointer to value
+ #endif
+#else
+#define STBDS_ADDRESSOF(typevar, value) &(value)
+#endif
+
+#define STBDS_OFFSETOF(var,field) ((char *) &(var)->field - (char *) (var))
+
+#define stbds_header(t) ((stbds_array_header *) (t) - 1)
+#define stbds_temp(t) stbds_header(t)->temp
+#define stbds_temp_key(t) (*(char **) stbds_header(t)->hash_table)
+
+#define stbds_arrsetcap(a,n) (stbds_arrgrow(a,0,n))
+#define stbds_arrsetlen(a,n) ((stbds_arrcap(a) < (size_t) (n) ? stbds_arrsetcap((a),(size_t)(n)),0 : 0), (a) ? stbds_header(a)->length = (size_t) (n) : 0)
+#define stbds_arrcap(a) ((a) ? stbds_header(a)->capacity : 0)
+#define stbds_arrlen(a) ((a) ? (ptrdiff_t) stbds_header(a)->length : 0)
+#define stbds_arrlenu(a) ((a) ? stbds_header(a)->length : 0)
+#define stbds_arrput(a,v) (stbds_arrmaybegrow(a,1), (a)[stbds_header(a)->length++] = (v))
+#define stbds_arrpush stbds_arrput // synonym
+#define stbds_arrpop(a) (stbds_header(a)->length--, (a)[stbds_header(a)->length])
+#define stbds_arraddn(a,n) ((void)(stbds_arraddnindex(a, n))) // deprecated, use one of the following instead:
+#define stbds_arraddnptr(a,n) (stbds_arrmaybegrow(a,n), (n) ? (stbds_header(a)->length += (n), &(a)[stbds_header(a)->length-(n)]) : (a))
+#define stbds_arraddnindex(a,n)(stbds_arrmaybegrow(a,n), (n) ? (stbds_header(a)->length += (n), stbds_header(a)->length-(n)) : stbds_arrlen(a))
+#define stbds_arraddnoff stbds_arraddnindex
+#define stbds_arrlast(a) ((a)[stbds_header(a)->length-1])
+#define stbds_arrfree(a) ((void) ((a) ? STBDS_FREE(NULL,stbds_header(a)) : (void)0), (a)=NULL)
+#define stbds_arrdel(a,i) stbds_arrdeln(a,i,1)
+#define stbds_arrdeln(a,i,n) (memmove(&(a)[i], &(a)[(i)+(n)], sizeof *(a) * (stbds_header(a)->length-(n)-(i))), stbds_header(a)->length -= (n))
+#define stbds_arrdelswap(a,i) ((a)[i] = stbds_arrlast(a), stbds_header(a)->length -= 1)
+#define stbds_arrinsn(a,i,n) (stbds_arraddn((a),(n)), memmove(&(a)[(i)+(n)], &(a)[i], sizeof *(a) * (stbds_header(a)->length-(n)-(i))))
+#define stbds_arrins(a,i,v) (stbds_arrinsn((a),(i),1), (a)[i]=(v))
+
+#define stbds_arrmaybegrow(a,n) ((!(a) || stbds_header(a)->length + (n) > stbds_header(a)->capacity) \
+ ? (stbds_arrgrow(a,n,0),0) : 0)
+
+#define stbds_arrgrow(a,b,c) ((a) = stbds_arrgrowf_wrapper((a), sizeof *(a), (b), (c)))
+
+#define stbds_hmput(t, k, v) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), (void*) STBDS_ADDRESSOF((t)->key, (k)), sizeof (t)->key, 0), \
+ (t)[stbds_temp((t)-1)].key = (k), \
+ (t)[stbds_temp((t)-1)].value = (v))
+
+#define stbds_hmputs(t, s) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), &(s).key, sizeof (s).key, STBDS_HM_BINARY), \
+ (t)[stbds_temp((t)-1)] = (s))
+
+#define stbds_hmgeti(t,k) \
+ ((t) = stbds_hmget_key_wrapper((t), sizeof *(t), (void*) STBDS_ADDRESSOF((t)->key, (k)), sizeof (t)->key, STBDS_HM_BINARY), \
+ stbds_temp((t)-1))
+
+#define stbds_hmgeti_ts(t,k,temp) \
+ ((t) = stbds_hmget_key_ts_wrapper((t), sizeof *(t), (void*) STBDS_ADDRESSOF((t)->key, (k)), sizeof (t)->key, &(temp), STBDS_HM_BINARY), \
+ (temp))
+
+#define stbds_hmgetp(t, k) \
+ ((void) stbds_hmgeti(t,k), &(t)[stbds_temp((t)-1)])
+
+#define stbds_hmgetp_ts(t, k, temp) \
+ ((void) stbds_hmgeti_ts(t,k,temp), &(t)[temp])
+
+#define stbds_hmdel(t,k) \
+ (((t) = stbds_hmdel_key_wrapper((t),sizeof *(t), (void*) STBDS_ADDRESSOF((t)->key, (k)), sizeof (t)->key, STBDS_OFFSETOF((t),key), STBDS_HM_BINARY)),(t)?stbds_temp((t)-1):0)
+
+#define stbds_hmdefault(t, v) \
+ ((t) = stbds_hmput_default_wrapper((t), sizeof *(t)), (t)[-1].value = (v))
+
+#define stbds_hmdefaults(t, s) \
+ ((t) = stbds_hmput_default_wrapper((t), sizeof *(t)), (t)[-1] = (s))
+
+#define stbds_hmfree(p) \
+ ((void) ((p) != NULL ? stbds_hmfree_func((p)-1,sizeof*(p)),0 : 0),(p)=NULL)
+
+#define stbds_hmgets(t, k) (*stbds_hmgetp(t,k))
+#define stbds_hmget(t, k) (stbds_hmgetp(t,k)->value)
+#define stbds_hmget_ts(t, k, temp) (stbds_hmgetp_ts(t,k,temp)->value)
+#define stbds_hmlen(t) ((t) ? (ptrdiff_t) stbds_header((t)-1)->length-1 : 0)
+#define stbds_hmlenu(t) ((t) ? stbds_header((t)-1)->length-1 : 0)
+#define stbds_hmgetp_null(t,k) (stbds_hmgeti(t,k) == -1 ? NULL : &(t)[stbds_temp((t)-1)])
+
+#define stbds_shput(t, k, v) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), (void*) (k), sizeof (t)->key, STBDS_HM_STRING), \
+ (t)[stbds_temp((t)-1)].value = (v))
+
+#define stbds_shputi(t, k, v) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), (void*) (k), sizeof (t)->key, STBDS_HM_STRING), \
+ (t)[stbds_temp((t)-1)].value = (v), stbds_temp((t)-1))
+
+#define stbds_shputs(t, s) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), (void*) (s).key, sizeof (s).key, STBDS_HM_STRING), \
+ (t)[stbds_temp((t)-1)] = (s), \
+ (t)[stbds_temp((t)-1)].key = stbds_temp_key((t)-1)) // above line overwrites whole structure, so must rewrite key here if it was allocated internally
+
+#define stbds_pshput(t, p) \
+ ((t) = stbds_hmput_key_wrapper((t), sizeof *(t), (void*) (p)->key, sizeof (p)->key, STBDS_HM_PTR_TO_STRING), \
+ (t)[stbds_temp((t)-1)] = (p))
+
+#define stbds_shgeti(t,k) \
+ ((t) = stbds_hmget_key_wrapper((t), sizeof *(t), (void*) (k), sizeof (t)->key, STBDS_HM_STRING), \
+ stbds_temp((t)-1))
+
+#define stbds_pshgeti(t,k) \
+ ((t) = stbds_hmget_key_wrapper((t), sizeof *(t), (void*) (k), sizeof (*(t))->key, STBDS_HM_PTR_TO_STRING), \
+ stbds_temp((t)-1))
+
+#define stbds_shgetp(t, k) \
+ ((void) stbds_shgeti(t,k), &(t)[stbds_temp((t)-1)])
+
+#define stbds_pshget(t, k) \
+ ((void) stbds_pshgeti(t,k), (t)[stbds_temp((t)-1)])
+
+#define stbds_shdel(t,k) \
+ (((t) = stbds_hmdel_key_wrapper((t),sizeof *(t), (void*) (k), sizeof (t)->key, STBDS_OFFSETOF((t),key), STBDS_HM_STRING)),(t)?stbds_temp((t)-1):0)
+#define stbds_pshdel(t,k) \
+ (((t) = stbds_hmdel_key_wrapper((t),sizeof *(t), (void*) (k), sizeof (*(t))->key, STBDS_OFFSETOF(*(t),key), STBDS_HM_PTR_TO_STRING)),(t)?stbds_temp((t)-1):0)
+
+#define stbds_sh_new_arena(t) \
+ ((t) = stbds_shmode_func_wrapper(t, sizeof *(t), STBDS_SH_ARENA))
+#define stbds_sh_new_strdup(t) \
+ ((t) = stbds_shmode_func_wrapper(t, sizeof *(t), STBDS_SH_STRDUP))
+
+#define stbds_shdefault(t, v) stbds_hmdefault(t,v)
+#define stbds_shdefaults(t, s) stbds_hmdefaults(t,s)
+
+#define stbds_shfree stbds_hmfree
+#define stbds_shlenu stbds_hmlenu
+
+#define stbds_shgets(t, k) (*stbds_shgetp(t,k))
+#define stbds_shget(t, k) (stbds_shgetp(t,k)->value)
+#define stbds_shgetp_null(t,k) (stbds_shgeti(t,k) == -1 ? NULL : &(t)[stbds_temp((t)-1)])
+#define stbds_shlen stbds_hmlen
+
+typedef struct
+{
+ size_t length;
+ size_t capacity;
+ void * hash_table;
+ ptrdiff_t temp;
+} stbds_array_header;
+
+typedef struct stbds_string_block
+{
+ struct stbds_string_block *next;
+ char storage[8];
+} stbds_string_block;
+
+struct stbds_string_arena
+{
+ stbds_string_block *storage;
+ size_t remaining;
+ unsigned char block;
+ unsigned char mode; // this isn't used by the string arena itself
+};
+
+#define STBDS_HM_BINARY 0
+#define STBDS_HM_STRING 1
+
+enum
+{
+ STBDS_SH_NONE,
+ STBDS_SH_DEFAULT,
+ STBDS_SH_STRDUP,
+ STBDS_SH_ARENA
+};
+
+#ifdef __cplusplus
+// in C we use implicit assignment from these void*-returning functions to T*.
+// in C++ these templates make the same code work
+template<class T> static T * stbds_arrgrowf_wrapper(T *a, size_t elemsize, size_t addlen, size_t min_cap) {
+ return (T*)stbds_arrgrowf((void *)a, elemsize, addlen, min_cap);
+}
+template<class T> static T * stbds_hmget_key_wrapper(T *a, size_t elemsize, void *key, size_t keysize, int mode) {
+ return (T*)stbds_hmget_key((void*)a, elemsize, key, keysize, mode);
+}
+template<class T> static T * stbds_hmget_key_ts_wrapper(T *a, size_t elemsize, void *key, size_t keysize, ptrdiff_t *temp, int mode) {
+ return (T*)stbds_hmget_key_ts((void*)a, elemsize, key, keysize, temp, mode);
+}
+template<class T> static T * stbds_hmput_default_wrapper(T *a, size_t elemsize) {
+ return (T*)stbds_hmput_default((void *)a, elemsize);
+}
+template<class T> static T * stbds_hmput_key_wrapper(T *a, size_t elemsize, void *key, size_t keysize, int mode) {
+ return (T*)stbds_hmput_key((void*)a, elemsize, key, keysize, mode);
+}
+template<class T> static T * stbds_hmdel_key_wrapper(T *a, size_t elemsize, void *key, size_t keysize, size_t keyoffset, int mode){
+ return (T*)stbds_hmdel_key((void*)a, elemsize, key, keysize, keyoffset, mode);
+}
+template<class T> static T * stbds_shmode_func_wrapper(T *, size_t elemsize, int mode) {
+ return (T*)stbds_shmode_func(elemsize, mode);
+}
+#else
+#define stbds_arrgrowf_wrapper stbds_arrgrowf
+#define stbds_hmget_key_wrapper stbds_hmget_key
+#define stbds_hmget_key_ts_wrapper stbds_hmget_key_ts
+#define stbds_hmput_default_wrapper stbds_hmput_default
+#define stbds_hmput_key_wrapper stbds_hmput_key
+#define stbds_hmdel_key_wrapper stbds_hmdel_key
+#define stbds_shmode_func_wrapper(t,e,m) stbds_shmode_func(e,m)
+#endif
+
+#endif // INCLUDE_STB_DS_H
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// IMPLEMENTATION
+//
+
+#ifdef STB_DS_IMPLEMENTATION
+#include <assert.h>
+#include <string.h>
+
+#ifndef STBDS_ASSERT
+#define STBDS_ASSERT_WAS_UNDEFINED
+#define STBDS_ASSERT(x) ((void) 0)
+#endif
+
+#ifdef STBDS_STATISTICS
+#define STBDS_STATS(x) x
+size_t stbds_array_grow;
+size_t stbds_hash_grow;
+size_t stbds_hash_shrink;
+size_t stbds_hash_rebuild;
+size_t stbds_hash_probes;
+size_t stbds_hash_alloc;
+size_t stbds_rehash_probes;
+size_t stbds_rehash_items;
+#else
+#define STBDS_STATS(x)
+#endif
+
+//
+// stbds_arr implementation
+//
+
+//int *prev_allocs[65536];
+//int num_prev;
+
+void *stbds_arrgrowf(void *a, size_t elemsize, size_t addlen, size_t min_cap)
+{
+ stbds_array_header temp={0}; // force debugging
+ void *b;
+ size_t min_len = stbds_arrlen(a) + addlen;
+ (void) sizeof(temp);
+
+ // compute the minimum capacity needed
+ if (min_len > min_cap)
+ min_cap = min_len;
+
+ if (min_cap <= stbds_arrcap(a))
+ return a;
+
+ // increase needed capacity to guarantee O(1) amortized
+ if (min_cap < 2 * stbds_arrcap(a))
+ min_cap = 2 * stbds_arrcap(a);
+ else if (min_cap < 4)
+ min_cap = 4;
+
+ //if (num_prev < 65536) if (a) prev_allocs[num_prev++] = (int *) ((char *) a+1);
+ //if (num_prev == 2201)
+ // num_prev = num_prev;
+ b = STBDS_REALLOC(NULL, (a) ? stbds_header(a) : 0, elemsize * min_cap + sizeof(stbds_array_header));
+ //if (num_prev < 65536) prev_allocs[num_prev++] = (int *) (char *) b;
+ b = (char *) b + sizeof(stbds_array_header);
+ if (a == NULL) {
+ stbds_header(b)->length = 0;
+ stbds_header(b)->hash_table = 0;
+ stbds_header(b)->temp = 0;
+ } else {
+ STBDS_STATS(++stbds_array_grow);
+ }
+ stbds_header(b)->capacity = min_cap;
+
+ return b;
+}
+
+void stbds_arrfreef(void *a)
+{
+ STBDS_FREE(NULL, stbds_header(a));
+}
+
+//
+// stbds_hm hash table implementation
+//
+
+#ifdef STBDS_INTERNAL_SMALL_BUCKET
+#define STBDS_BUCKET_LENGTH 4
+#else
+#define STBDS_BUCKET_LENGTH 8
+#endif
+
+#define STBDS_BUCKET_SHIFT (STBDS_BUCKET_LENGTH == 8 ? 3 : 2)
+#define STBDS_BUCKET_MASK (STBDS_BUCKET_LENGTH-1)
+#define STBDS_CACHE_LINE_SIZE 64
+
+#define STBDS_ALIGN_FWD(n,a) (((n) + (a) - 1) & ~((a)-1))
+
+typedef struct
+{
+ size_t hash [STBDS_BUCKET_LENGTH];
+ ptrdiff_t index[STBDS_BUCKET_LENGTH];
+} stbds_hash_bucket; // in 32-bit, this is one 64-byte cache line; in 64-bit, each array is one 64-byte cache line
+
+typedef struct
+{
+ char * temp_key; // this MUST be the first field of the hash table
+ size_t slot_count;
+ size_t used_count;
+ size_t used_count_threshold;
+ size_t used_count_shrink_threshold;
+ size_t tombstone_count;
+ size_t tombstone_count_threshold;
+ size_t seed;
+ size_t slot_count_log2;
+ stbds_string_arena string;
+ stbds_hash_bucket *storage; // not a separate allocation, just 64-byte aligned storage after this struct
+} stbds_hash_index;
+
+#define STBDS_INDEX_EMPTY -1
+#define STBDS_INDEX_DELETED -2
+#define STBDS_INDEX_IN_USE(x) ((x) >= 0)
+
+#define STBDS_HASH_EMPTY 0
+#define STBDS_HASH_DELETED 1
+
+static size_t stbds_hash_seed=0x31415926;
+
+void stbds_rand_seed(size_t seed)
+{
+ stbds_hash_seed = seed;
+}
+
+#define stbds_load_32_or_64(var, temp, v32, v64_hi, v64_lo) \
+ temp = v64_lo ^ v32, temp <<= 16, temp <<= 16, temp >>= 16, temp >>= 16, /* discard if 32-bit */ \
+ var = v64_hi, var <<= 16, var <<= 16, /* discard if 32-bit */ \
+ var ^= temp ^ v32
+
+#define STBDS_SIZE_T_BITS ((sizeof (size_t)) * 8)
+
+static size_t stbds_probe_position(size_t hash, size_t slot_count, size_t slot_log2)
+{
+ size_t pos;
+ STBDS_NOTUSED(slot_log2);
+ pos = hash & (slot_count-1);
+ #ifdef STBDS_INTERNAL_BUCKET_START
+ pos &= ~STBDS_BUCKET_MASK;
+ #endif
+ return pos;
+}
+
+static size_t stbds_log2(size_t slot_count)
+{
+ size_t n=0;
+ while (slot_count > 1) {
+ slot_count >>= 1;
+ ++n;
+ }
+ return n;
+}
+
+static stbds_hash_index *stbds_make_hash_index(size_t slot_count, stbds_hash_index *ot)
+{
+ stbds_hash_index *t;
+ t = (stbds_hash_index *) STBDS_REALLOC(NULL,0,(slot_count >> STBDS_BUCKET_SHIFT) * sizeof(stbds_hash_bucket) + sizeof(stbds_hash_index) + STBDS_CACHE_LINE_SIZE-1);
+ t->storage = (stbds_hash_bucket *) STBDS_ALIGN_FWD((size_t) (t+1), STBDS_CACHE_LINE_SIZE);
+ t->slot_count = slot_count;
+ t->slot_count_log2 = stbds_log2(slot_count);
+ t->tombstone_count = 0;
+ t->used_count = 0;
+
+ #if 0 // A1
+ t->used_count_threshold = slot_count*12/16; // if 12/16th of table is occupied, grow
+ t->tombstone_count_threshold = slot_count* 2/16; // if tombstones are 2/16th of table, rebuild
+ t->used_count_shrink_threshold = slot_count* 4/16; // if table is only 4/16th full, shrink
+ #elif 1 // A2
+ //t->used_count_threshold = slot_count*12/16; // if 12/16th of table is occupied, grow
+ //t->tombstone_count_threshold = slot_count* 3/16; // if tombstones are 3/16th of table, rebuild
+ //t->used_count_shrink_threshold = slot_count* 4/16; // if table is only 4/16th full, shrink
+
+ // compute without overflowing
+ t->used_count_threshold = slot_count - (slot_count>>2);
+ t->tombstone_count_threshold = (slot_count>>3) + (slot_count>>4);
+ t->used_count_shrink_threshold = slot_count >> 2;
+
+ #elif 0 // B1
+ t->used_count_threshold = slot_count*13/16; // if 13/16th of table is occupied, grow
+ t->tombstone_count_threshold = slot_count* 2/16; // if tombstones are 2/16th of table, rebuild
+ t->used_count_shrink_threshold = slot_count* 5/16; // if table is only 5/16th full, shrink
+ #else // C1
+ t->used_count_threshold = slot_count*14/16; // if 14/16th of table is occupied, grow
+ t->tombstone_count_threshold = slot_count* 2/16; // if tombstones are 2/16th of table, rebuild
+ t->used_count_shrink_threshold = slot_count* 6/16; // if table is only 6/16th full, shrink
+ #endif
+ // Following statistics were measured on a Core i7-6700 @ 4.00Ghz, compiled with clang 7.0.1 -O2
+ // Note that the larger tables have high variance as they were run fewer times
+ // A1 A2 B1 C1
+ // 0.10ms : 0.10ms : 0.10ms : 0.11ms : 2,000 inserts creating 2K table
+ // 0.96ms : 0.95ms : 0.97ms : 1.04ms : 20,000 inserts creating 20K table
+ // 14.48ms : 14.46ms : 10.63ms : 11.00ms : 200,000 inserts creating 200K table
+ // 195.74ms : 196.35ms : 203.69ms : 214.92ms : 2,000,000 inserts creating 2M table
+ // 2193.88ms : 2209.22ms : 2285.54ms : 2437.17ms : 20,000,000 inserts creating 20M table
+ // 65.27ms : 53.77ms : 65.33ms : 65.47ms : 500,000 inserts & deletes in 2K table
+ // 72.78ms : 62.45ms : 71.95ms : 72.85ms : 500,000 inserts & deletes in 20K table
+ // 89.47ms : 77.72ms : 96.49ms : 96.75ms : 500,000 inserts & deletes in 200K table
+ // 97.58ms : 98.14ms : 97.18ms : 97.53ms : 500,000 inserts & deletes in 2M table
+ // 118.61ms : 119.62ms : 120.16ms : 118.86ms : 500,000 inserts & deletes in 20M table
+ // 192.11ms : 194.39ms : 196.38ms : 195.73ms : 500,000 inserts & deletes in 200M table
+
+ if (slot_count <= STBDS_BUCKET_LENGTH)
+ t->used_count_shrink_threshold = 0;
+ // to avoid infinite loop, we need to guarantee that at least one slot is empty and will terminate probes
+ STBDS_ASSERT(t->used_count_threshold + t->tombstone_count_threshold < t->slot_count);
+ STBDS_STATS(++stbds_hash_alloc);
+ if (ot) {
+ t->string = ot->string;
+ // reuse old seed so we can reuse old hashes so below "copy out old data" doesn't do any hashing
+ t->seed = ot->seed;
+ } else {
+ size_t a,b,temp;
+ memset(&t->string, 0, sizeof(t->string));
+ t->seed = stbds_hash_seed;
+ // LCG
+ // in 32-bit, a = 2147001325 b = 715136305
+ // in 64-bit, a = 2862933555777941757 b = 3037000493
+ stbds_load_32_or_64(a,temp, 2147001325, 0x27bb2ee6, 0x87b0b0fd);
+ stbds_load_32_or_64(b,temp, 715136305, 0, 0xb504f32d);
+ stbds_hash_seed = stbds_hash_seed * a + b;
+ }
+
+ {
+ size_t i,j;
+ for (i=0; i < slot_count >> STBDS_BUCKET_SHIFT; ++i) {
+ stbds_hash_bucket *b = &t->storage[i];
+ for (j=0; j < STBDS_BUCKET_LENGTH; ++j)
+ b->hash[j] = STBDS_HASH_EMPTY;
+ for (j=0; j < STBDS_BUCKET_LENGTH; ++j)
+ b->index[j] = STBDS_INDEX_EMPTY;
+ }
+ }
+
+ // copy out the old data, if any
+ if (ot) {
+ size_t i,j;
+ t->used_count = ot->used_count;
+ for (i=0; i < ot->slot_count >> STBDS_BUCKET_SHIFT; ++i) {
+ stbds_hash_bucket *ob = &ot->storage[i];
+ for (j=0; j < STBDS_BUCKET_LENGTH; ++j) {
+ if (STBDS_INDEX_IN_USE(ob->index[j])) {
+ size_t hash = ob->hash[j];
+ size_t pos = stbds_probe_position(hash, t->slot_count, t->slot_count_log2);
+ size_t step = STBDS_BUCKET_LENGTH;
+ STBDS_STATS(++stbds_rehash_items);
+ for (;;) {
+ size_t limit,z;
+ stbds_hash_bucket *bucket;
+ bucket = &t->storage[pos >> STBDS_BUCKET_SHIFT];
+ STBDS_STATS(++stbds_rehash_probes);
+
+ for (z=pos & STBDS_BUCKET_MASK; z < STBDS_BUCKET_LENGTH; ++z) {
+ if (bucket->hash[z] == 0) {
+ bucket->hash[z] = hash;
+ bucket->index[z] = ob->index[j];
+ goto done;
+ }
+ }
+
+ limit = pos & STBDS_BUCKET_MASK;
+ for (z = 0; z < limit; ++z) {
+ if (bucket->hash[z] == 0) {
+ bucket->hash[z] = hash;
+ bucket->index[z] = ob->index[j];
+ goto done;
+ }
+ }
+
+ pos += step; // quadratic probing
+ step += STBDS_BUCKET_LENGTH;
+ pos &= (t->slot_count-1);
+ }
+ }
+ done:
+ ;
+ }
+ }
+ }
+
+ return t;
+}
+
+#define STBDS_ROTATE_LEFT(val, n) (((val) << (n)) | ((val) >> (STBDS_SIZE_T_BITS - (n))))
+#define STBDS_ROTATE_RIGHT(val, n) (((val) >> (n)) | ((val) << (STBDS_SIZE_T_BITS - (n))))
+
+size_t stbds_hash_string(char *str, size_t seed)
+{
+ size_t hash = seed;
+ while (*str)
+ hash = STBDS_ROTATE_LEFT(hash, 9) + (unsigned char) *str++;
+
+ // Thomas Wang 64-to-32 bit mix function, hopefully also works in 32 bits
+ hash ^= seed;
+ hash = (~hash) + (hash << 18);
+ hash ^= hash ^ STBDS_ROTATE_RIGHT(hash,31);
+ hash = hash * 21;
+ hash ^= hash ^ STBDS_ROTATE_RIGHT(hash,11);
+ hash += (hash << 6);
+ hash ^= STBDS_ROTATE_RIGHT(hash,22);
+ return hash+seed;
+}
+
+#ifdef STBDS_SIPHASH_2_4
+#define STBDS_SIPHASH_C_ROUNDS 2
+#define STBDS_SIPHASH_D_ROUNDS 4
+typedef int STBDS_SIPHASH_2_4_can_only_be_used_in_64_bit_builds[sizeof(size_t) == 8 ? 1 : -1];
+#endif
+
+#ifndef STBDS_SIPHASH_C_ROUNDS
+#define STBDS_SIPHASH_C_ROUNDS 1
+#endif
+#ifndef STBDS_SIPHASH_D_ROUNDS
+#define STBDS_SIPHASH_D_ROUNDS 1
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4127) // conditional expression is constant, for do..while(0) and sizeof()==
+#endif
+
+static size_t stbds_siphash_bytes(void *p, size_t len, size_t seed)
+{
+ unsigned char *d = (unsigned char *) p;
+ size_t i,j;
+ size_t v0,v1,v2,v3, data;
+
+ // hash that works on 32- or 64-bit registers without knowing which we have
+ // (computes different results on 32-bit and 64-bit platform)
+ // derived from siphash, but on 32-bit platforms very different as it uses 4 32-bit state not 4 64-bit
+ v0 = ((((size_t) 0x736f6d65 << 16) << 16) + 0x70736575) ^ seed;
+ v1 = ((((size_t) 0x646f7261 << 16) << 16) + 0x6e646f6d) ^ ~seed;
+ v2 = ((((size_t) 0x6c796765 << 16) << 16) + 0x6e657261) ^ seed;
+ v3 = ((((size_t) 0x74656462 << 16) << 16) + 0x79746573) ^ ~seed;
+
+ #ifdef STBDS_TEST_SIPHASH_2_4
+ // hardcoded with key material in the siphash test vectors
+ v0 ^= 0x0706050403020100ull ^ seed;
+ v1 ^= 0x0f0e0d0c0b0a0908ull ^ ~seed;
+ v2 ^= 0x0706050403020100ull ^ seed;
+ v3 ^= 0x0f0e0d0c0b0a0908ull ^ ~seed;
+ #endif
+
+ #define STBDS_SIPROUND() \
+ do { \
+ v0 += v1; v1 = STBDS_ROTATE_LEFT(v1, 13); v1 ^= v0; v0 = STBDS_ROTATE_LEFT(v0,STBDS_SIZE_T_BITS/2); \
+ v2 += v3; v3 = STBDS_ROTATE_LEFT(v3, 16); v3 ^= v2; \
+ v2 += v1; v1 = STBDS_ROTATE_LEFT(v1, 17); v1 ^= v2; v2 = STBDS_ROTATE_LEFT(v2,STBDS_SIZE_T_BITS/2); \
+ v0 += v3; v3 = STBDS_ROTATE_LEFT(v3, 21); v3 ^= v0; \
+ } while (0)
+
+ for (i=0; i+sizeof(size_t) <= len; i += sizeof(size_t), d += sizeof(size_t)) {
+ data = d[0] | (d[1] << 8) | (d[2] << 16) | (d[3] << 24);
+ data |= (size_t) (d[4] | (d[5] << 8) | (d[6] << 16) | (d[7] << 24)) << 16 << 16; // discarded if size_t == 4
+
+ v3 ^= data;
+ for (j=0; j < STBDS_SIPHASH_C_ROUNDS; ++j)
+ STBDS_SIPROUND();
+ v0 ^= data;
+ }
+ data = len << (STBDS_SIZE_T_BITS-8);
+ switch (len - i) {
+ case 7: data |= ((size_t) d[6] << 24) << 24; // fall through
+ case 6: data |= ((size_t) d[5] << 20) << 20; // fall through
+ case 5: data |= ((size_t) d[4] << 16) << 16; // fall through
+ case 4: data |= (d[3] << 24); // fall through
+ case 3: data |= (d[2] << 16); // fall through
+ case 2: data |= (d[1] << 8); // fall through
+ case 1: data |= d[0]; // fall through
+ case 0: break;
+ }
+ v3 ^= data;
+ for (j=0; j < STBDS_SIPHASH_C_ROUNDS; ++j)
+ STBDS_SIPROUND();
+ v0 ^= data;
+ v2 ^= 0xff;
+ for (j=0; j < STBDS_SIPHASH_D_ROUNDS; ++j)
+ STBDS_SIPROUND();
+
+#ifdef STBDS_SIPHASH_2_4
+ return v0^v1^v2^v3;
+#else
+ return v1^v2^v3; // slightly stronger since v0^v3 in above cancels out final round operation? I tweeted at the authors of SipHash about this but they didn't reply
+#endif
+}
+
+size_t stbds_hash_bytes(void *p, size_t len, size_t seed)
+{
+#ifdef STBDS_SIPHASH_2_4
+ return stbds_siphash_bytes(p,len,seed);
+#else
+ unsigned char *d = (unsigned char *) p;
+
+ if (len == 4) {
+ unsigned int hash = d[0] | (d[1] << 8) | (d[2] << 16) | (d[3] << 24);
+ #if 0
+ // HASH32-A Bob Jenkin's hash function w/o large constants
+ hash ^= seed;
+ hash -= (hash<<6);
+ hash ^= (hash>>17);
+ hash -= (hash<<9);
+ hash ^= seed;
+ hash ^= (hash<<4);
+ hash -= (hash<<3);
+ hash ^= (hash<<10);
+ hash ^= (hash>>15);
+ #elif 1
+ // HASH32-BB Bob Jenkin's presumably-accidental version of Thomas Wang hash with rotates turned into shifts.
+ // Note that converting these back to rotates makes it run a lot slower, presumably due to collisions, so I'm
+ // not really sure what's going on.
+ hash ^= seed;
+ hash = (hash ^ 61) ^ (hash >> 16);
+ hash = hash + (hash << 3);
+ hash = hash ^ (hash >> 4);
+ hash = hash * 0x27d4eb2d;
+ hash ^= seed;
+ hash = hash ^ (hash >> 15);
+ #else // HASH32-C - Murmur3
+ hash ^= seed;
+ hash *= 0xcc9e2d51;
+ hash = (hash << 17) | (hash >> 15);
+ hash *= 0x1b873593;
+ hash ^= seed;
+ hash = (hash << 19) | (hash >> 13);
+ hash = hash*5 + 0xe6546b64;
+ hash ^= hash >> 16;
+ hash *= 0x85ebca6b;
+ hash ^= seed;
+ hash ^= hash >> 13;
+ hash *= 0xc2b2ae35;
+ hash ^= hash >> 16;
+ #endif
+ // Following statistics were measured on a Core i7-6700 @ 4.00Ghz, compiled with clang 7.0.1 -O2
+ // Note that the larger tables have high variance as they were run fewer times
+ // HASH32-A // HASH32-BB // HASH32-C
+ // 0.10ms // 0.10ms // 0.10ms : 2,000 inserts creating 2K table
+ // 0.96ms // 0.95ms // 0.99ms : 20,000 inserts creating 20K table
+ // 14.69ms // 14.43ms // 14.97ms : 200,000 inserts creating 200K table
+ // 199.99ms // 195.36ms // 202.05ms : 2,000,000 inserts creating 2M table
+ // 2234.84ms // 2187.74ms // 2240.38ms : 20,000,000 inserts creating 20M table
+ // 55.68ms // 53.72ms // 57.31ms : 500,000 inserts & deletes in 2K table
+ // 63.43ms // 61.99ms // 65.73ms : 500,000 inserts & deletes in 20K table
+ // 80.04ms // 77.96ms // 81.83ms : 500,000 inserts & deletes in 200K table
+ // 100.42ms // 97.40ms // 102.39ms : 500,000 inserts & deletes in 2M table
+ // 119.71ms // 120.59ms // 121.63ms : 500,000 inserts & deletes in 20M table
+ // 185.28ms // 195.15ms // 187.74ms : 500,000 inserts & deletes in 200M table
+ // 15.58ms // 14.79ms // 15.52ms : 200,000 inserts creating 200K table with varying key spacing
+
+ return (((size_t) hash << 16 << 16) | hash) ^ seed;
+ } else if (len == 8 && sizeof(size_t) == 8) {
+ size_t hash = d[0] | (d[1] << 8) | (d[2] << 16) | (d[3] << 24);
+ hash |= (size_t) (d[4] | (d[5] << 8) | (d[6] << 16) | (d[7] << 24)) << 16 << 16; // avoid warning if size_t == 4
+ hash ^= seed;
+ hash = (~hash) + (hash << 21);
+ hash ^= STBDS_ROTATE_RIGHT(hash,24);
+ hash *= 265;
+ hash ^= STBDS_ROTATE_RIGHT(hash,14);
+ hash ^= seed;
+ hash *= 21;
+ hash ^= STBDS_ROTATE_RIGHT(hash,28);
+ hash += (hash << 31);
+ hash = (~hash) + (hash << 18);
+ return hash;
+ } else {
+ return stbds_siphash_bytes(p,len,seed);
+ }
+#endif
+}
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+
+static int stbds_is_key_equal(void *a, size_t elemsize, void *key, size_t keysize, size_t keyoffset, int mode, size_t i)
+{
+ if (mode >= STBDS_HM_STRING)
+ return 0==strcmp((char *) key, * (char **) ((char *) a + elemsize*i + keyoffset));
+ else
+ return 0==memcmp(key, (char *) a + elemsize*i + keyoffset, keysize);
+}
+
+#define STBDS_HASH_TO_ARR(x,elemsize) ((char*) (x) - (elemsize))
+#define STBDS_ARR_TO_HASH(x,elemsize) ((char*) (x) + (elemsize))
+
+#define stbds_hash_table(a) ((stbds_hash_index *) stbds_header(a)->hash_table)
+
+void stbds_hmfree_func(void *a, size_t elemsize)
+{
+ if (a == NULL) return;
+ if (stbds_hash_table(a) != NULL) {
+ if (stbds_hash_table(a)->string.mode == STBDS_SH_STRDUP) {
+ size_t i;
+ // skip 0th element, which is default
+ for (i=1; i < stbds_header(a)->length; ++i)
+ STBDS_FREE(NULL, *(char**) ((char *) a + elemsize*i));
+ }
+ stbds_strreset(&stbds_hash_table(a)->string);
+ }
+ STBDS_FREE(NULL, stbds_header(a)->hash_table);
+ STBDS_FREE(NULL, stbds_header(a));
+}
+
+static ptrdiff_t stbds_hm_find_slot(void *a, size_t elemsize, void *key, size_t keysize, size_t keyoffset, int mode)
+{
+ void *raw_a = STBDS_HASH_TO_ARR(a,elemsize);
+ stbds_hash_index *table = stbds_hash_table(raw_a);
+ size_t hash = mode >= STBDS_HM_STRING ? stbds_hash_string((char*)key,table->seed) : stbds_hash_bytes(key, keysize,table->seed);
+ size_t step = STBDS_BUCKET_LENGTH;
+ size_t limit,i;
+ size_t pos;
+ stbds_hash_bucket *bucket;
+
+ if (hash < 2) hash += 2; // stored hash values are forbidden from being 0, so we can detect empty slots
+
+ pos = stbds_probe_position(hash, table->slot_count, table->slot_count_log2);
+
+ for (;;) {
+ STBDS_STATS(++stbds_hash_probes);
+ bucket = &table->storage[pos >> STBDS_BUCKET_SHIFT];
+
+ // start searching from pos to end of bucket, this should help performance on small hash tables that fit in cache
+ for (i=pos & STBDS_BUCKET_MASK; i < STBDS_BUCKET_LENGTH; ++i) {
+ if (bucket->hash[i] == hash) {
+ if (stbds_is_key_equal(a, elemsize, key, keysize, keyoffset, mode, bucket->index[i])) {
+ return (pos & ~STBDS_BUCKET_MASK)+i;
+ }
+ } else if (bucket->hash[i] == STBDS_HASH_EMPTY) {
+ return -1;
+ }
+ }
+
+ // search from beginning of bucket to pos
+ limit = pos & STBDS_BUCKET_MASK;
+ for (i = 0; i < limit; ++i) {
+ if (bucket->hash[i] == hash) {
+ if (stbds_is_key_equal(a, elemsize, key, keysize, keyoffset, mode, bucket->index[i])) {
+ return (pos & ~STBDS_BUCKET_MASK)+i;
+ }
+ } else if (bucket->hash[i] == STBDS_HASH_EMPTY) {
+ return -1;
+ }
+ }
+
+ // quadratic probing
+ pos += step;
+ step += STBDS_BUCKET_LENGTH;
+ pos &= (table->slot_count-1);
+ }
+ /* NOTREACHED */
+}
+
+void * stbds_hmget_key_ts(void *a, size_t elemsize, void *key, size_t keysize, ptrdiff_t *temp, int mode)
+{
+ size_t keyoffset = 0;
+ if (a == NULL) {
+ // make it non-empty so we can return a temp
+ a = stbds_arrgrowf(0, elemsize, 0, 1);
+ stbds_header(a)->length += 1;
+ memset(a, 0, elemsize);
+ *temp = STBDS_INDEX_EMPTY;
+ // adjust a to point after the default element
+ return STBDS_ARR_TO_HASH(a,elemsize);
+ } else {
+ stbds_hash_index *table;
+ void *raw_a = STBDS_HASH_TO_ARR(a,elemsize);
+ // adjust a to point to the default element
+ table = (stbds_hash_index *) stbds_header(raw_a)->hash_table;
+ if (table == 0) {
+ *temp = -1;
+ } else {
+ ptrdiff_t slot = stbds_hm_find_slot(a, elemsize, key, keysize, keyoffset, mode);
+ if (slot < 0) {
+ *temp = STBDS_INDEX_EMPTY;
+ } else {
+ stbds_hash_bucket *b = &table->storage[slot >> STBDS_BUCKET_SHIFT];
+ *temp = b->index[slot & STBDS_BUCKET_MASK];
+ }
+ }
+ return a;
+ }
+}
+
+void * stbds_hmget_key(void *a, size_t elemsize, void *key, size_t keysize, int mode)
+{
+ ptrdiff_t temp;
+ void *p = stbds_hmget_key_ts(a, elemsize, key, keysize, &temp, mode);
+ stbds_temp(STBDS_HASH_TO_ARR(p,elemsize)) = temp;
+ return p;
+}
+
+void * stbds_hmput_default(void *a, size_t elemsize)
+{
+ // three cases:
+ // a is NULL <- allocate
+ // a has a hash table but no entries, because of shmode <- grow
+ // a has entries <- do nothing
+ if (a == NULL || stbds_header(STBDS_HASH_TO_ARR(a,elemsize))->length == 0) {
+ a = stbds_arrgrowf(a ? STBDS_HASH_TO_ARR(a,elemsize) : NULL, elemsize, 0, 1);
+ stbds_header(a)->length += 1;
+ memset(a, 0, elemsize);
+ a=STBDS_ARR_TO_HASH(a,elemsize);
+ }
+ return a;
+}
+
+static char *stbds_strdup(char *str);
+
+void *stbds_hmput_key(void *a, size_t elemsize, void *key, size_t keysize, int mode)
+{
+ size_t keyoffset=0;
+ void *raw_a;
+ stbds_hash_index *table;
+
+ if (a == NULL) {
+ a = stbds_arrgrowf(0, elemsize, 0, 1);
+ memset(a, 0, elemsize);
+ stbds_header(a)->length += 1;
+ // adjust a to point AFTER the default element
+ a = STBDS_ARR_TO_HASH(a,elemsize);
+ }
+
+ // adjust a to point to the default element
+ raw_a = a;
+ a = STBDS_HASH_TO_ARR(a,elemsize);
+
+ table = (stbds_hash_index *) stbds_header(a)->hash_table;
+
+ if (table == NULL || table->used_count >= table->used_count_threshold) {
+ stbds_hash_index *nt;
+ size_t slot_count;
+
+ slot_count = (table == NULL) ? STBDS_BUCKET_LENGTH : table->slot_count*2;
+ nt = stbds_make_hash_index(slot_count, table);
+ if (table)
+ STBDS_FREE(NULL, table);
+ else
+ nt->string.mode = mode >= STBDS_HM_STRING ? STBDS_SH_DEFAULT : 0;
+ stbds_header(a)->hash_table = table = nt;
+ STBDS_STATS(++stbds_hash_grow);
+ }
+
+ // we iterate hash table explicitly because we want to track if we saw a tombstone
+ {
+ size_t hash = mode >= STBDS_HM_STRING ? stbds_hash_string((char*)key,table->seed) : stbds_hash_bytes(key, keysize,table->seed);
+ size_t step = STBDS_BUCKET_LENGTH;
+ size_t pos;
+ ptrdiff_t tombstone = -1;
+ stbds_hash_bucket *bucket;
+
+ // stored hash values are forbidden from being 0, so we can detect empty slots to early out quickly
+ if (hash < 2) hash += 2;
+
+ pos = stbds_probe_position(hash, table->slot_count, table->slot_count_log2);
+
+ for (;;) {
+ size_t limit, i;
+ STBDS_STATS(++stbds_hash_probes);
+ bucket = &table->storage[pos >> STBDS_BUCKET_SHIFT];
+
+ // start searching from pos to end of bucket
+ for (i=pos & STBDS_BUCKET_MASK; i < STBDS_BUCKET_LENGTH; ++i) {
+ if (bucket->hash[i] == hash) {
+ if (stbds_is_key_equal(raw_a, elemsize, key, keysize, keyoffset, mode, bucket->index[i])) {
+ stbds_temp(a) = bucket->index[i];
+ if (mode >= STBDS_HM_STRING)
+ stbds_temp_key(a) = * (char **) ((char *) raw_a + elemsize*bucket->index[i] + keyoffset);
+ return STBDS_ARR_TO_HASH(a,elemsize);
+ }
+ } else if (bucket->hash[i] == 0) {
+ pos = (pos & ~STBDS_BUCKET_MASK) + i;
+ goto found_empty_slot;
+ } else if (tombstone < 0) {
+ if (bucket->index[i] == STBDS_INDEX_DELETED)
+ tombstone = (ptrdiff_t) ((pos & ~STBDS_BUCKET_MASK) + i);
+ }
+ }
+
+ // search from beginning of bucket to pos
+ limit = pos & STBDS_BUCKET_MASK;
+ for (i = 0; i < limit; ++i) {
+ if (bucket->hash[i] == hash) {
+ if (stbds_is_key_equal(raw_a, elemsize, key, keysize, keyoffset, mode, bucket->index[i])) {
+ stbds_temp(a) = bucket->index[i];
+ return STBDS_ARR_TO_HASH(a,elemsize);
+ }
+ } else if (bucket->hash[i] == 0) {
+ pos = (pos & ~STBDS_BUCKET_MASK) + i;
+ goto found_empty_slot;
+ } else if (tombstone < 0) {
+ if (bucket->index[i] == STBDS_INDEX_DELETED)
+ tombstone = (ptrdiff_t) ((pos & ~STBDS_BUCKET_MASK) + i);
+ }
+ }
+
+ // quadratic probing
+ pos += step;
+ step += STBDS_BUCKET_LENGTH;
+ pos &= (table->slot_count-1);
+ }
+ found_empty_slot:
+ if (tombstone >= 0) {
+ pos = tombstone;
+ --table->tombstone_count;
+ }
+ ++table->used_count;
+
+ {
+ ptrdiff_t i = (ptrdiff_t) stbds_arrlen(a);
+ // we want to do stbds_arraddn(1), but we can't use the macros since we don't have something of the right type
+ if ((size_t) i+1 > stbds_arrcap(a))
+ *(void **) &a = stbds_arrgrowf(a, elemsize, 1, 0);
+ raw_a = STBDS_ARR_TO_HASH(a,elemsize);
+
+ STBDS_ASSERT((size_t) i+1 <= stbds_arrcap(a));
+ stbds_header(a)->length = i+1;
+ bucket = &table->storage[pos >> STBDS_BUCKET_SHIFT];
+ bucket->hash[pos & STBDS_BUCKET_MASK] = hash;
+ bucket->index[pos & STBDS_BUCKET_MASK] = i-1;
+ stbds_temp(a) = i-1;
+
+ switch (table->string.mode) {
+ case STBDS_SH_STRDUP: stbds_temp_key(a) = *(char **) ((char *) a + elemsize*i) = stbds_strdup((char*) key); break;
+ case STBDS_SH_ARENA: stbds_temp_key(a) = *(char **) ((char *) a + elemsize*i) = stbds_stralloc(&table->string, (char*)key); break;
+ case STBDS_SH_DEFAULT: stbds_temp_key(a) = *(char **) ((char *) a + elemsize*i) = (char *) key; break;
+ default: memcpy((char *) a + elemsize*i, key, keysize); break;
+ }
+ }
+ return STBDS_ARR_TO_HASH(a,elemsize);
+ }
+}
+
+void * stbds_shmode_func(size_t elemsize, int mode)
+{
+ void *a = stbds_arrgrowf(0, elemsize, 0, 1);
+ stbds_hash_index *h;
+ memset(a, 0, elemsize);
+ stbds_header(a)->length = 1;
+ stbds_header(a)->hash_table = h = (stbds_hash_index *) stbds_make_hash_index(STBDS_BUCKET_LENGTH, NULL);
+ h->string.mode = (unsigned char) mode;
+ return STBDS_ARR_TO_HASH(a,elemsize);
+}
+
+void * stbds_hmdel_key(void *a, size_t elemsize, void *key, size_t keysize, size_t keyoffset, int mode)
+{
+ if (a == NULL) {
+ return 0;
+ } else {
+ stbds_hash_index *table;
+ void *raw_a = STBDS_HASH_TO_ARR(a,elemsize);
+ table = (stbds_hash_index *) stbds_header(raw_a)->hash_table;
+ stbds_temp(raw_a) = 0;
+ if (table == 0) {
+ return a;
+ } else {
+ ptrdiff_t slot;
+ slot = stbds_hm_find_slot(a, elemsize, key, keysize, keyoffset, mode);
+ if (slot < 0)
+ return a;
+ else {
+ stbds_hash_bucket *b = &table->storage[slot >> STBDS_BUCKET_SHIFT];
+ int i = slot & STBDS_BUCKET_MASK;
+ ptrdiff_t old_index = b->index[i];
+ ptrdiff_t final_index = (ptrdiff_t) stbds_arrlen(raw_a)-1-1; // minus one for the raw_a vs a, and minus one for 'last'
+ STBDS_ASSERT(slot < (ptrdiff_t) table->slot_count);
+ --table->used_count;
+ ++table->tombstone_count;
+ stbds_temp(raw_a) = 1;
+ STBDS_ASSERT(table->used_count >= 0);
+ //STBDS_ASSERT(table->tombstone_count < table->slot_count/4);
+ b->hash[i] = STBDS_HASH_DELETED;
+ b->index[i] = STBDS_INDEX_DELETED;
+
+ if (mode == STBDS_HM_STRING && table->string.mode == STBDS_SH_STRDUP)
+ STBDS_FREE(NULL, *(char**) ((char *) a+elemsize*old_index));
+
+ // if indices are the same, memcpy is a no-op, but back-pointer-fixup will fail, so skip
+ if (old_index != final_index) {
+ // swap delete
+ memmove((char*) a + elemsize*old_index, (char*) a + elemsize*final_index, elemsize);
+
+ // now find the slot for the last element
+ if (mode == STBDS_HM_STRING)
+ slot = stbds_hm_find_slot(a, elemsize, *(char**) ((char *) a+elemsize*old_index + keyoffset), keysize, keyoffset, mode);
+ else
+ slot = stbds_hm_find_slot(a, elemsize, (char* ) a+elemsize*old_index + keyoffset, keysize, keyoffset, mode);
+ STBDS_ASSERT(slot >= 0);
+ b = &table->storage[slot >> STBDS_BUCKET_SHIFT];
+ i = slot & STBDS_BUCKET_MASK;
+ STBDS_ASSERT(b->index[i] == final_index);
+ b->index[i] = old_index;
+ }
+ stbds_header(raw_a)->length -= 1;
+
+ if (table->used_count < table->used_count_shrink_threshold && table->slot_count > STBDS_BUCKET_LENGTH) {
+ stbds_header(raw_a)->hash_table = stbds_make_hash_index(table->slot_count>>1, table);
+ STBDS_FREE(NULL, table);
+ STBDS_STATS(++stbds_hash_shrink);
+ } else if (table->tombstone_count > table->tombstone_count_threshold) {
+ stbds_header(raw_a)->hash_table = stbds_make_hash_index(table->slot_count , table);
+ STBDS_FREE(NULL, table);
+ STBDS_STATS(++stbds_hash_rebuild);
+ }
+
+ return a;
+ }
+ }
+ }
+ /* NOTREACHED */
+}
+
+static char *stbds_strdup(char *str)
+{
+ // to keep replaceable allocator simple, we don't want to use strdup.
+ // rolling our own also avoids problem of strdup vs _strdup
+ size_t len = strlen(str)+1;
+ char *p = (char*) STBDS_REALLOC(NULL, 0, len);
+ memmove(p, str, len);
+ return p;
+}
+
+#ifndef STBDS_STRING_ARENA_BLOCKSIZE_MIN
+#define STBDS_STRING_ARENA_BLOCKSIZE_MIN 512u
+#endif
+#ifndef STBDS_STRING_ARENA_BLOCKSIZE_MAX
+#define STBDS_STRING_ARENA_BLOCKSIZE_MAX (1u<<20)
+#endif
+
+char *stbds_stralloc(stbds_string_arena *a, char *str)
+{
+ char *p;
+ size_t len = strlen(str)+1;
+ if (len > a->remaining) {
+ // compute the next blocksize
+ size_t blocksize = a->block;
+
+ // size is 512, 512, 1024, 1024, 2048, 2048, 4096, 4096, etc., so that
+ // there are log(SIZE) allocations to free when we destroy the table
+ blocksize = (size_t) (STBDS_STRING_ARENA_BLOCKSIZE_MIN) << (blocksize>>1);
+
+ // if size is under 1M, advance to next blocktype
+ if (blocksize < (size_t)(STBDS_STRING_ARENA_BLOCKSIZE_MAX))
+ ++a->block;
+
+ if (len > blocksize) {
+ // if string is larger than blocksize, then just allocate the full size.
+ // note that we still advance string_block so block size will continue
+ // increasing, so e.g. if somebody only calls this with 1000-long strings,
+ // eventually the arena will start doubling and handling those as well
+ stbds_string_block *sb = (stbds_string_block *) STBDS_REALLOC(NULL, 0, sizeof(*sb)-8 + len);
+ memmove(sb->storage, str, len);
+ if (a->storage) {
+ // insert it after the first element, so that we don't waste the space there
+ sb->next = a->storage->next;
+ a->storage->next = sb;
+ } else {
+ sb->next = 0;
+ a->storage = sb;
+ a->remaining = 0; // this is redundant, but good for clarity
+ }
+ return sb->storage;
+ } else {
+ stbds_string_block *sb = (stbds_string_block *) STBDS_REALLOC(NULL, 0, sizeof(*sb)-8 + blocksize);
+ sb->next = a->storage;
+ a->storage = sb;
+ a->remaining = blocksize;
+ }
+ }
+
+ STBDS_ASSERT(len <= a->remaining);
+ p = a->storage->storage + a->remaining - len;
+ a->remaining -= len;
+ memmove(p, str, len);
+ return p;
+}
+
+void stbds_strreset(stbds_string_arena *a)
+{
+ stbds_string_block *x,*y;
+ x = a->storage;
+ while (x) {
+ y = x->next;
+ STBDS_FREE(NULL, x);
+ x = y;
+ }
+ memset(a, 0, sizeof(*a));
+}
+
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// UNIT TESTS
+//
+
+#ifdef STBDS_UNIT_TESTS
+#include <stdio.h>
+#ifdef STBDS_ASSERT_WAS_UNDEFINED
+#undef STBDS_ASSERT
+#endif
+#ifndef STBDS_ASSERT
+#define STBDS_ASSERT assert
+#include <assert.h>
+#endif
+
+typedef struct { int key,b,c,d; } stbds_struct;
+typedef struct { int key[2],b,c,d; } stbds_struct2;
+
+static char buffer[256];
+char *strkey(int n)
+{
+#if defined(_WIN32) && defined(__STDC_WANT_SECURE_LIB__)
+ sprintf_s(buffer, sizeof(buffer), "test_%d", n);
+#else
+ sprintf(buffer, "test_%d", n);
+#endif
+ return buffer;
+}
+
+void stbds_unit_tests(void)
+{
+#if defined(_MSC_VER) && _MSC_VER <= 1200 && defined(__cplusplus)
+ // VC6 C++ doesn't like the template<> trick on unnamed structures, so do nothing!
+ STBDS_ASSERT(0);
+#else
+ const int testsize = 100000;
+ const int testsize2 = testsize/20;
+ int *arr=NULL;
+ struct { int key; int value; } *intmap = NULL;
+ struct { char *key; int value; } *strmap = NULL, s;
+ struct { stbds_struct key; int value; } *map = NULL;
+ stbds_struct *map2 = NULL;
+ stbds_struct2 *map3 = NULL;
+ stbds_string_arena sa = { 0 };
+ int key3[2] = { 1,2 };
+ ptrdiff_t temp;
+
+ int i,j;
+
+ STBDS_ASSERT(arrlen(arr)==0);
+ for (i=0; i < 20000; i += 50) {
+ for (j=0; j < i; ++j)
+ arrpush(arr,j);
+ arrfree(arr);
+ }
+
+ for (i=0; i < 4; ++i) {
+ arrpush(arr,1); arrpush(arr,2); arrpush(arr,3); arrpush(arr,4);
+ arrdel(arr,i);
+ arrfree(arr);
+ arrpush(arr,1); arrpush(arr,2); arrpush(arr,3); arrpush(arr,4);
+ arrdelswap(arr,i);
+ arrfree(arr);
+ }
+
+ for (i=0; i < 5; ++i) {
+ arrpush(arr,1); arrpush(arr,2); arrpush(arr,3); arrpush(arr,4);
+ stbds_arrins(arr,i,5);
+ STBDS_ASSERT(arr[i] == 5);
+ if (i < 4)
+ STBDS_ASSERT(arr[4] == 4);
+ arrfree(arr);
+ }
+
+ i = 1;
+ STBDS_ASSERT(hmgeti(intmap,i) == -1);
+ hmdefault(intmap, -2);
+ STBDS_ASSERT(hmgeti(intmap, i) == -1);
+ STBDS_ASSERT(hmget (intmap, i) == -2);
+ for (i=0; i < testsize; i+=2)
+ hmput(intmap, i, i*5);
+ for (i=0; i < testsize; i+=1) {
+ if (i & 1) STBDS_ASSERT(hmget(intmap, i) == -2 );
+ else STBDS_ASSERT(hmget(intmap, i) == i*5);
+ if (i & 1) STBDS_ASSERT(hmget_ts(intmap, i, temp) == -2 );
+ else STBDS_ASSERT(hmget_ts(intmap, i, temp) == i*5);
+ }
+ for (i=0; i < testsize; i+=2)
+ hmput(intmap, i, i*3);
+ for (i=0; i < testsize; i+=1)
+ if (i & 1) STBDS_ASSERT(hmget(intmap, i) == -2 );
+ else STBDS_ASSERT(hmget(intmap, i) == i*3);
+ for (i=2; i < testsize; i+=4)
+ hmdel(intmap, i); // delete half the entries
+ for (i=0; i < testsize; i+=1)
+ if (i & 3) STBDS_ASSERT(hmget(intmap, i) == -2 );
+ else STBDS_ASSERT(hmget(intmap, i) == i*3);
+ for (i=0; i < testsize; i+=1)
+ hmdel(intmap, i); // delete the rest of the entries
+ for (i=0; i < testsize; i+=1)
+ STBDS_ASSERT(hmget(intmap, i) == -2 );
+ hmfree(intmap);
+ for (i=0; i < testsize; i+=2)
+ hmput(intmap, i, i*3);
+ hmfree(intmap);
+
+ #if defined(__clang__) || defined(__GNUC__)
+ #ifndef __cplusplus
+ intmap = NULL;
+ hmput(intmap, 15, 7);
+ hmput(intmap, 11, 3);
+ hmput(intmap, 9, 5);
+ STBDS_ASSERT(hmget(intmap, 9) == 5);
+ STBDS_ASSERT(hmget(intmap, 11) == 3);
+ STBDS_ASSERT(hmget(intmap, 15) == 7);
+ #endif
+ #endif
+
+ for (i=0; i < testsize; ++i)
+ stralloc(&sa, strkey(i));
+ strreset(&sa);
+
+ {
+ s.key = "a", s.value = 1;
+ shputs(strmap, s);
+ STBDS_ASSERT(*strmap[0].key == 'a');
+ STBDS_ASSERT(strmap[0].key == s.key);
+ STBDS_ASSERT(strmap[0].value == s.value);
+ shfree(strmap);
+ }
+
+ {
+ s.key = "a", s.value = 1;
+ sh_new_strdup(strmap);
+ shputs(strmap, s);
+ STBDS_ASSERT(*strmap[0].key == 'a');
+ STBDS_ASSERT(strmap[0].key != s.key);
+ STBDS_ASSERT(strmap[0].value == s.value);
+ shfree(strmap);
+ }
+
+ {
+ s.key = "a", s.value = 1;
+ sh_new_arena(strmap);
+ shputs(strmap, s);
+ STBDS_ASSERT(*strmap[0].key == 'a');
+ STBDS_ASSERT(strmap[0].key != s.key);
+ STBDS_ASSERT(strmap[0].value == s.value);
+ shfree(strmap);
+ }
+
+ for (j=0; j < 2; ++j) {
+ STBDS_ASSERT(shgeti(strmap,"foo") == -1);
+ if (j == 0)
+ sh_new_strdup(strmap);
+ else
+ sh_new_arena(strmap);
+ STBDS_ASSERT(shgeti(strmap,"foo") == -1);
+ shdefault(strmap, -2);
+ STBDS_ASSERT(shgeti(strmap,"foo") == -1);
+ for (i=0; i < testsize; i+=2)
+ shput(strmap, strkey(i), i*3);
+ for (i=0; i < testsize; i+=1)
+ if (i & 1) STBDS_ASSERT(shget(strmap, strkey(i)) == -2 );
+ else STBDS_ASSERT(shget(strmap, strkey(i)) == i*3);
+ for (i=2; i < testsize; i+=4)
+ shdel(strmap, strkey(i)); // delete half the entries
+ for (i=0; i < testsize; i+=1)
+ if (i & 3) STBDS_ASSERT(shget(strmap, strkey(i)) == -2 );
+ else STBDS_ASSERT(shget(strmap, strkey(i)) == i*3);
+ for (i=0; i < testsize; i+=1)
+ shdel(strmap, strkey(i)); // delete the rest of the entries
+ for (i=0; i < testsize; i+=1)
+ STBDS_ASSERT(shget(strmap, strkey(i)) == -2 );
+ shfree(strmap);
+ }
+
+ {
+ struct { char *key; char value; } *hash = NULL;
+ char name[4] = "jen";
+ shput(hash, "bob" , 'h');
+ shput(hash, "sally" , 'e');
+ shput(hash, "fred" , 'l');
+ shput(hash, "jen" , 'x');
+ shput(hash, "doug" , 'o');
+
+ shput(hash, name , 'l');
+ shfree(hash);
+ }
+
+ for (i=0; i < testsize; i += 2) {
+ stbds_struct s = { i,i*2,i*3,i*4 };
+ hmput(map, s, i*5);
+ }
+
+ for (i=0; i < testsize; i += 1) {
+ stbds_struct s = { i,i*2,i*3 ,i*4 };
+ stbds_struct t = { i,i*2,i*3+1,i*4 };
+ if (i & 1) STBDS_ASSERT(hmget(map, s) == 0);
+ else STBDS_ASSERT(hmget(map, s) == i*5);
+ if (i & 1) STBDS_ASSERT(hmget_ts(map, s, temp) == 0);
+ else STBDS_ASSERT(hmget_ts(map, s, temp) == i*5);
+ //STBDS_ASSERT(hmget(map, t.key) == 0);
+ }
+
+ for (i=0; i < testsize; i += 2) {
+ stbds_struct s = { i,i*2,i*3,i*4 };
+ hmputs(map2, s);
+ }
+ hmfree(map);
+
+ for (i=0; i < testsize; i += 1) {
+ stbds_struct s = { i,i*2,i*3,i*4 };
+ stbds_struct t = { i,i*2,i*3+1,i*4 };
+ if (i & 1) STBDS_ASSERT(hmgets(map2, s.key).d == 0);
+ else STBDS_ASSERT(hmgets(map2, s.key).d == i*4);
+ //STBDS_ASSERT(hmgetp(map2, t.key) == 0);
+ }
+ hmfree(map2);
+
+ for (i=0; i < testsize; i += 2) {
+ stbds_struct2 s = { { i,i*2 }, i*3,i*4, i*5 };
+ hmputs(map3, s);
+ }
+ for (i=0; i < testsize; i += 1) {
+ stbds_struct2 s = { { i,i*2}, i*3, i*4, i*5 };
+ stbds_struct2 t = { { i,i*2}, i*3+1, i*4, i*5 };
+ if (i & 1) STBDS_ASSERT(hmgets(map3, s.key).d == 0);
+ else STBDS_ASSERT(hmgets(map3, s.key).d == i*5);
+ //STBDS_ASSERT(hmgetp(map3, t.key) == 0);
+ }
+#endif
+}
+#endif
+
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2019 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
+
projects / fishladder.git / commitdiff