722 lines
23 KiB
V
722 lines
23 KiB
V
module c
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import strings
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import v.pref
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// NB: @@@ here serve as placeholders.
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// They will be replaced with correct strings
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// for each constant, during C code generation.
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// V_COMMIT_HASH is generated by cmd/tools/gen_vc.v .
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const c_commit_hash_default = '
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#ifndef V_COMMIT_HASH
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#define V_COMMIT_HASH "@@@"
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#endif
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'
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// V_CURRENT_COMMIT_HASH is updated, when V is rebuilt inside a git repo.
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const c_current_commit_hash_default = '
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#ifndef V_CURRENT_COMMIT_HASH
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#define V_CURRENT_COMMIT_HASH "@@@"
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#endif
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'
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const c_concurrency_helpers = '
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typedef struct __shared_map __shared_map;
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struct __shared_map { sync__RwMutex mtx; map val; };
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static inline voidptr __dup_shared_map(voidptr src, int sz) {
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__shared_map* dest = memdup(src, sz);
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sync__RwMutex_init(&dest->mtx);
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return dest;
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}
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typedef struct __shared_array __shared_array;
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struct __shared_array { sync__RwMutex mtx; array val; };
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static inline voidptr __dup_shared_array(voidptr src, int sz) {
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__shared_array* dest = memdup(src, sz);
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sync__RwMutex_init(&dest->mtx);
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return dest;
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}
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static inline void __sort_ptr(uintptr_t a[], bool b[], int l) {
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for (int i=1; i<l; i++) {
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uintptr_t ins = a[i];
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bool insb = b[i];
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int j = i;
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while(j>0 && a[j-1] > ins) {
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a[j] = a[j-1];
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b[j] = b[j-1];
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j--;
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}
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a[j] = ins;
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b[j] = insb;
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}
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}
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'
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// Heavily based on Chris Wellons's work
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// https://nullprogram.com/blog/2017/01/08/
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fn c_closure_helpers(pref &pref.Preferences) string {
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if pref.os == .windows {
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verror('closures are not implemented on Windows yet')
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}
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if pref.arch != .amd64 {
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verror('closures are not implemented on this architecture yet: $pref.arch')
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}
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mut builder := strings.new_builder(2048)
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if pref.os != .windows {
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builder.writeln('#include <sys/mman.h>')
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}
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if pref.arch == .amd64 {
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builder.write_string('
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static unsigned char __closure_thunk[6][13] = {
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{
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0x48, 0x8b, 0x3d, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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}, {
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0x48, 0x8b, 0x35, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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}, {
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0x48, 0x8b, 0x15, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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}, {
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0x48, 0x8b, 0x0d, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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}, {
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0x4C, 0x8b, 0x05, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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}, {
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0x4C, 0x8b, 0x0d, 0xe9, 0xff, 0xff, 0xff,
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0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
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},
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};
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')
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}
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builder.write_string('
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static void __closure_set_data(void *closure, void *data) {
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void **p = closure;
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p[-2] = data;
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}
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static void __closure_set_function(void *closure, void *f) {
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void **p = closure;
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p[-1] = f;
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}
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')
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if pref.os != .windows {
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builder.write_string('
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static void * __closure_create(void *f, int nargs, void *userdata) {
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long page_size = sysconf(_SC_PAGESIZE);
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int prot = PROT_READ | PROT_WRITE;
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int flags = MAP_ANONYMOUS | MAP_PRIVATE;
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char *p = mmap(0, page_size * 2, prot, flags, -1, 0);
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if (p == MAP_FAILED)
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return 0;
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void *closure = p + page_size;
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memcpy(closure, __closure_thunk[nargs - 1], sizeof(__closure_thunk[0]));
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mprotect(closure, page_size, PROT_READ | PROT_EXEC);
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__closure_set_function(closure, f);
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__closure_set_data(closure, userdata);
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return closure;
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}
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static void __closure_destroy(void *closure) {
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long page_size = sysconf(_SC_PAGESIZE);
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munmap((char *)closure - page_size, page_size * 2);
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}
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')
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}
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return builder.str()
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}
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const c_common_macros = '
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#define EMPTY_VARG_INITIALIZATION 0
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#define EMPTY_STRUCT_DECLARATION
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#define EMPTY_STRUCT_INITIALIZATION
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// Due to a tcc bug, the length of an array needs to be specified, but GCC crashes if it is...
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#define EMPTY_ARRAY_OF_ELEMS(x,n) (x[])
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#define TCCSKIP(x) x
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#define __NOINLINE __attribute__((noinline))
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#define __IRQHANDLER __attribute__((interrupt))
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#define __V_architecture 0
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#if defined(__x86_64__)
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#define __V_amd64 1
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#undef __V_architecture
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#define __V_architecture 1
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#endif
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#if defined(__aarch64__) || defined(__arm64__)
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#define __V_arm64 1
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#undef __V_architecture
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#define __V_architecture 2
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#endif
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// Using just __GNUC__ for detecting gcc, is not reliable because other compilers define it too:
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#ifdef __GNUC__
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#define __V_GCC__
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#endif
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#ifdef __TINYC__
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#undef __V_GCC__
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#endif
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#ifdef __cplusplus
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#undef __V_GCC__
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#endif
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#ifdef __clang__
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#undef __V_GCC__
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#endif
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#ifdef _MSC_VER
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#undef __V_GCC__
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#undef EMPTY_STRUCT_INITIALIZATION
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#define EMPTY_STRUCT_INITIALIZATION 0
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#endif
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#ifdef __TINYC__
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#undef EMPTY_STRUCT_DECLARATION
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#define EMPTY_STRUCT_DECLARATION char _dummy
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#undef EMPTY_ARRAY_OF_ELEMS
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#define EMPTY_ARRAY_OF_ELEMS(x,n) (x[n])
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#undef __NOINLINE
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#undef __IRQHANDLER
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// tcc does not support inlining at all
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#define __NOINLINE
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#define __IRQHANDLER
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#undef TCCSKIP
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#define TCCSKIP(x)
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// #include <byteswap.h>
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#ifndef _WIN32
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#include <execinfo.h>
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int tcc_backtrace(const char *fmt, ...);
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#endif
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#endif
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// Use __offsetof_ptr instead of __offset_of, when you *do* have a valid pointer, to avoid UB:
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#ifndef __offsetof_ptr
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#define __offsetof_ptr(ptr,PTYPE,FIELDNAME) ((size_t)((byte *)&((PTYPE *)ptr)->FIELDNAME - (byte *)ptr))
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#endif
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// for __offset_of
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#ifndef __offsetof
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#define __offsetof(PTYPE,FIELDNAME) ((size_t)((char *)&((PTYPE *)0)->FIELDNAME - (char *)0))
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#endif
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#define OPTION_CAST(x) (x)
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#ifndef V64_PRINTFORMAT
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#ifdef PRIx64
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#define V64_PRINTFORMAT "0x%"PRIx64
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#elif defined(__WIN32__)
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#define V64_PRINTFORMAT "0x%I64x"
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#elif defined(__linux__) && defined(__LP64__)
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#define V64_PRINTFORMAT "0x%lx"
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#else
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#define V64_PRINTFORMAT "0x%llx"
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#endif
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#endif
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#if defined(_WIN32) || defined(__CYGWIN__)
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#define VV_EXPORTED_SYMBOL extern __declspec(dllexport)
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#define VV_LOCAL_SYMBOL static
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#else
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// 4 < gcc < 5 is used by some older Ubuntu LTS and Centos versions,
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// and does not support __has_attribute(visibility) ...
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#ifndef __has_attribute
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#define __has_attribute(x) 0 // Compatibility with non-clang compilers.
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#endif
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#if (defined(__GNUC__) && (__GNUC__ >= 4)) || (defined(__clang__) && __has_attribute(visibility))
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#ifdef ARM
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#define VV_EXPORTED_SYMBOL extern __attribute__((externally_visible,visibility("default")))
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#else
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#define VV_EXPORTED_SYMBOL extern __attribute__((visibility("default")))
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#endif
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#define VV_LOCAL_SYMBOL __attribute__ ((visibility ("hidden")))
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#else
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#define VV_EXPORTED_SYMBOL extern
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#define VV_LOCAL_SYMBOL static
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#endif
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#endif
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#ifdef __cplusplus
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#include <utility>
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#define _MOV std::move
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#else
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#define _MOV
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#endif
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// tcc does not support has_include properly yet, turn it off completely
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#if defined(__TINYC__) && defined(__has_include)
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#undef __has_include
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#endif
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#if !defined(VNORETURN)
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#if defined(__TINYC__)
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#include <stdnoreturn.h>
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#define VNORETURN noreturn
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#endif
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# if !defined(__TINYC__) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
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# define VNORETURN _Noreturn
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# elif defined(__GNUC__) && __GNUC__ >= 2
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# define VNORETURN __attribute__((noreturn))
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# endif
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#ifndef VNORETURN
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#define VNORETURN
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#endif
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#endif
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#if !defined(VUNREACHABLE)
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#if defined(__GNUC__) && !defined(__clang__)
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#define V_GCC_VERSION (__GNUC__ * 10000L + __GNUC_MINOR__ * 100L + __GNUC_PATCHLEVEL__)
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#if (V_GCC_VERSION >= 40500L)
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#define VUNREACHABLE() do { __builtin_unreachable(); } while (0)
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#endif
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#endif
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#if defined(__clang__) && defined(__has_builtin)
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#if __has_builtin(__builtin_unreachable)
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#define VUNREACHABLE() do { __builtin_unreachable(); } while (0)
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#endif
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#endif
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#ifndef VUNREACHABLE
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#define VUNREACHABLE() do { } while (0)
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#endif
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#if defined(__FreeBSD__) && defined(__TINYC__)
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#define VUNREACHABLE() do { } while (0)
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#endif
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#endif
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//likely and unlikely macros
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#if defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__clang__)
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#define _likely_(x) __builtin_expect(x,1)
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#define _unlikely_(x) __builtin_expect(x,0)
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#else
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#define _likely_(x) (x)
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#define _unlikely_(x) (x)
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#endif
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'
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const c_unsigned_comparison_functions = '
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// unsigned/signed comparisons
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static inline bool _us32_gt(uint32_t a, int32_t b) { return a > INT32_MAX || (int32_t)a > b; }
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static inline bool _us32_ge(uint32_t a, int32_t b) { return a >= INT32_MAX || (int32_t)a >= b; }
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static inline bool _us32_eq(uint32_t a, int32_t b) { return a <= INT32_MAX && (int32_t)a == b; }
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static inline bool _us32_ne(uint32_t a, int32_t b) { return a > INT32_MAX || (int32_t)a != b; }
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static inline bool _us32_le(uint32_t a, int32_t b) { return a <= INT32_MAX && (int32_t)a <= b; }
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static inline bool _us32_lt(uint32_t a, int32_t b) { return a < INT32_MAX && (int32_t)a < b; }
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static inline bool _us64_gt(uint64_t a, int64_t b) { return a > INT64_MAX || (int64_t)a > b; }
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static inline bool _us64_ge(uint64_t a, int64_t b) { return a >= INT64_MAX || (int64_t)a >= b; }
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static inline bool _us64_eq(uint64_t a, int64_t b) { return a <= INT64_MAX && (int64_t)a == b; }
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static inline bool _us64_ne(uint64_t a, int64_t b) { return a > INT64_MAX || (int64_t)a != b; }
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static inline bool _us64_le(uint64_t a, int64_t b) { return a <= INT64_MAX && (int64_t)a <= b; }
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static inline bool _us64_lt(uint64_t a, int64_t b) { return a < INT64_MAX && (int64_t)a < b; }
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'
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const c_helper_macros = '//============================== HELPER C MACROS =============================*/
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// _SLIT0 is used as NULL string for literal arguments
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// `"" s` is used to enforce a string literal argument
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#define _SLIT0 (string){.str=(byteptr)(""), .len=0, .is_lit=1}
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#define _SLIT(s) ((string){.str=(byteptr)("" s), .len=(sizeof(s)-1), .is_lit=1})
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#define _SLEN(s, n) ((string){.str=(byteptr)("" s), .len=n, .is_lit=1})
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// take the address of an rvalue
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#define ADDR(type, expr) (&((type[]){expr}[0]))
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// copy something to the heap
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#define HEAP(type, expr) ((type*)memdup((void*)&((type[]){expr}[0]), sizeof(type)))
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#define HEAP_noscan(type, expr) ((type*)memdup_noscan((void*)&((type[]){expr}[0]), sizeof(type)))
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#define _PUSH_MANY(arr, val, tmp, tmp_typ) {tmp_typ tmp = (val); array_push_many(arr, tmp.data, tmp.len);}
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#define _PUSH_MANY_noscan(arr, val, tmp, tmp_typ) {tmp_typ tmp = (val); array_push_many_noscan(arr, tmp.data, tmp.len);}
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'
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const c_headers = c_helper_macros + c_unsigned_comparison_functions + c_common_macros +
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r'
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// c_headers
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typedef int (*qsort_callback_func)(const void*, const void*);
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#include <stdio.h> // TODO remove all these includes, define all function signatures and types manually
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#include <stdlib.h>
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#include <string.h>
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#if defined(_WIN32) || defined(__CYGWIN__)
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#define VV_EXPORTED_SYMBOL extern __declspec(dllexport)
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#define VV_LOCAL_SYMBOL static
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#else
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// 4 < gcc < 5 is used by some older Ubuntu LTS and Centos versions,
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// and does not support __has_attribute(visibility) ...
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#ifndef __has_attribute
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#define __has_attribute(x) 0 // Compatibility with non-clang compilers.
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#endif
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#if (defined(__GNUC__) && (__GNUC__ >= 4)) || (defined(__clang__) && __has_attribute(visibility))
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#ifdef ARM
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#define VV_EXPORTED_SYMBOL extern __attribute__((externally_visible,visibility("default")))
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#else
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#define VV_EXPORTED_SYMBOL extern __attribute__((visibility("default")))
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#endif
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#define VV_LOCAL_SYMBOL __attribute__ ((visibility ("hidden")))
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#else
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#define VV_EXPORTED_SYMBOL extern
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#define VV_LOCAL_SYMBOL static
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#endif
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#endif
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#if defined(__TINYC__) && defined(__has_include)
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// tcc does not support has_include properly yet, turn it off completely
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#undef __has_include
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#endif
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#ifndef _WIN32
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#if defined __has_include
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#if __has_include (<execinfo.h>)
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#include <execinfo.h>
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#else
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// Most probably musl OR __ANDROID__ ...
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int backtrace (void **__array, int __size) { return 0; }
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char **backtrace_symbols (void *const *__array, int __size){ return 0; }
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void backtrace_symbols_fd (void *const *__array, int __size, int __fd){}
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#endif
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#endif
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#endif
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#include <stdarg.h> // for va_list
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//================================== GLOBALS =================================*/
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int load_so(byteptr);
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void reload_so();
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void _vinit(int ___argc, voidptr ___argv);
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void _vcleanup();
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#define sigaction_size sizeof(sigaction);
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#define _ARR_LEN(a) ( (sizeof(a)) / (sizeof(a[0])) )
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void v_free(voidptr ptr);
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voidptr memdup(voidptr src, int sz);
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#if INTPTR_MAX == INT32_MAX
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#define TARGET_IS_32BIT 1
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#elif INTPTR_MAX == INT64_MAX
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#define TARGET_IS_64BIT 1
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#else
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#error "The environment is not 32 or 64-bit."
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#endif
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ || defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN || defined(__BIG_ENDIAN__) || defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || defined(_MIBSEB) || defined(__MIBSEB) || defined(__MIBSEB__)
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#define TARGET_ORDER_IS_BIG 1
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#elif defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ || defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN || defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || defined(_MIPSEL) || defined(__MIPSEL) || defined(__MIPSEL__) || defined(_M_AMD64) || defined(_M_X64) || defined(_M_IX86)
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#define TARGET_ORDER_IS_LITTLE 1
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#else
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#error "Unknown architecture endianness"
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#endif
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#ifndef _WIN32
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#include <ctype.h>
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#include <locale.h> // tolower
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#include <sys/time.h>
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#include <unistd.h> // sleep
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extern char **environ;
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#endif
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#if defined(__CYGWIN__) && !defined(_WIN32)
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#error Cygwin is not supported, please use MinGW or Visual Studio.
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#endif
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#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(__vinix__) || defined(__serenity__) || defined(__sun)
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#include <sys/types.h>
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#include <sys/wait.h> // os__wait uses wait on nix
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#endif
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#ifdef __OpenBSD__
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#include <sys/types.h>
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#include <sys/resource.h>
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#include <sys/wait.h> // os__wait uses wait on nix
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#endif
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#ifdef __NetBSD__
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#include <sys/wait.h> // os__wait uses wait on nix
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#endif
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#ifdef _WIN32
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#define WINVER 0x0600
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#ifdef _WIN32_WINNT
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#undef _WIN32_WINNT
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#endif
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#define _WIN32_WINNT 0x0600
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#ifndef WIN32_FULL
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#define WIN32_LEAN_AND_MEAN
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#endif
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#ifndef _UNICODE
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#define _UNICODE
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#endif
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#ifndef UNICODE
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#define UNICODE
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#endif
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#include <windows.h>
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#include <io.h> // _waccess
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#include <direct.h> // _wgetcwd
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#include <signal.h> // signal and SIGSEGV for segmentation fault handler
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#ifdef _MSC_VER
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// On MSVC these are the same (as long as /volatile:ms is passed)
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#define _Atomic volatile
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// MSVC cannot parse some things properly
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#undef EMPTY_STRUCT_DECLARATION
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#undef OPTION_CAST
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#define EMPTY_STRUCT_DECLARATION char __pad
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#define OPTION_CAST(x)
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#undef __NOINLINE
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#undef __IRQHANDLER
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#define __NOINLINE __declspec(noinline)
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#define __IRQHANDLER __declspec(naked)
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#include <dbghelp.h>
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#pragma comment(lib, "Dbghelp")
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#endif
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#else
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#include <pthread.h>
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#ifndef PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
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// musl does not have that
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#define pthread_rwlockattr_setkind_np(a, b)
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#endif
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#endif
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// g_live_info is used by live.info()
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static void* g_live_info = NULL;
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#if defined(__MINGW32__) || defined(__MINGW64__) || (defined(_WIN32) && defined(__TINYC__))
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#undef PRId64
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#undef PRIi64
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#undef PRIo64
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#undef PRIu64
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#undef PRIx64
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#undef PRIX64
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#define PRId64 "lld"
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#define PRIi64 "lli"
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#define PRIo64 "llo"
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#define PRIu64 "llu"
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#define PRIx64 "llx"
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#define PRIX64 "llX"
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#endif
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#ifdef _VFREESTANDING
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#undef _VFREESTANDING
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#endif
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'
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const c_builtin_types = '
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//================================== builtin types ================================*/
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typedef int64_t i64;
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typedef int16_t i16;
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typedef int8_t i8;
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typedef uint64_t u64;
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typedef uint32_t u32;
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint8_t byte;
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typedef uint32_t rune;
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typedef size_t usize;
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typedef ptrdiff_t isize;
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typedef float f32;
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typedef double f64;
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typedef int64_t int_literal;
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typedef double float_literal;
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typedef unsigned char* byteptr;
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typedef void* voidptr;
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typedef char* charptr;
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typedef byte array_fixed_byte_300 [300];
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typedef struct sync__Channel* chan;
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#ifndef __cplusplus
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#ifndef bool
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typedef byte bool;
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#define true 1
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#define false 0
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#endif
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#endif
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typedef u64 (*MapHashFn)(voidptr);
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typedef bool (*MapEqFn)(voidptr, voidptr);
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typedef void (*MapCloneFn)(voidptr, voidptr);
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typedef void (*MapFreeFn)(voidptr);
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'
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const c_bare_headers = c_helper_macros + c_unsigned_comparison_functions + c_common_macros +
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'
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#define _VFREESTANDING
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typedef long unsigned int size_t;
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// Memory allocation related headers
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void *malloc(size_t size);
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void *calloc(size_t nitems, size_t size);
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void *realloc(void *ptr, size_t size);
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void *memcpy(void *dest, void *src, size_t n);
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void *memset(void *s, int c, size_t n);
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void *memmove(void *dest, void *src, size_t n);
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// varargs implementation, TODO: works on tcc and gcc, but is very unportable and hacky
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typedef __builtin_va_list va_list;
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#define va_start(a, b) __builtin_va_start(a, b)
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#define va_end(a) __builtin_va_end(a)
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#define va_arg(a, b) __builtin_va_arg(a, b)
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#define va_copy(a, b) __builtin_va_copy(a, b)
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//================================== GLOBALS =================================*/
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int load_so(byteptr);
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void reload_so();
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void _vinit(int ___argc, voidptr ___argv);
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void _vcleanup();
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#define sigaction_size sizeof(sigaction);
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#define _ARR_LEN(a) ( (sizeof(a)) / (sizeof(a[0])) )
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void v_free(voidptr ptr);
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voidptr memdup(voidptr src, int sz);
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'
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const c_wyhash_headers = '
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// ============== wyhash ==============
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#ifndef wyhash_final_version_3
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#define wyhash_final_version_3
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#ifndef WYHASH_CONDOM
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// protections that produce different results:
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// 1: normal valid behavior
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// 2: extra protection against entropy loss (probability=2^-63), aka. "blind multiplication"
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#define WYHASH_CONDOM 1
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#endif
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#ifndef WYHASH_32BIT_MUM
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// 0: normal version, slow on 32 bit systems
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// 1: faster on 32 bit systems but produces different results, incompatible with wy2u0k function
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#define WYHASH_32BIT_MUM 0
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#endif
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// includes
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#include <stdint.h>
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#if defined(_MSC_VER) && defined(_M_X64)
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#include <intrin.h>
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#pragma intrinsic(_umul128)
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#endif
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// 128bit multiply function
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static inline uint64_t _wyrot(uint64_t x) { return (x>>32)|(x<<32); }
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static inline void _wymum(uint64_t *A, uint64_t *B){
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#if(WYHASH_32BIT_MUM)
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uint64_t hh=(*A>>32)*(*B>>32), hl=(*A>>32)*(uint32_t)*B, lh=(uint32_t)*A*(*B>>32), ll=(uint64_t)(uint32_t)*A*(uint32_t)*B;
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#if(WYHASH_CONDOM>1)
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*A^=_wyrot(hl)^hh; *B^=_wyrot(lh)^ll;
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#else
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*A=_wyrot(hl)^hh; *B=_wyrot(lh)^ll;
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#endif
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#elif defined(__SIZEOF_INT128__)
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__uint128_t r=*A; r*=*B;
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#if(WYHASH_CONDOM>1)
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*A^=(uint64_t)r; *B^=(uint64_t)(r>>64);
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#else
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*A=(uint64_t)r; *B=(uint64_t)(r>>64);
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#endif
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#elif defined(_MSC_VER) && defined(_M_X64)
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#if(WYHASH_CONDOM>1)
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uint64_t a, b;
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a=_umul128(*A,*B,&b);
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*A^=a; *B^=b;
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#else
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*A=_umul128(*A,*B,B);
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#endif
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#else
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uint64_t ha=*A>>32, hb=*B>>32, la=(uint32_t)*A, lb=(uint32_t)*B, hi, lo;
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uint64_t rh=ha*hb, rm0=ha*lb, rm1=hb*la, rl=la*lb, t=rl+(rm0<<32), c=t<rl;
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lo=t+(rm1<<32); c+=lo<t; hi=rh+(rm0>>32)+(rm1>>32)+c;
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#if(WYHASH_CONDOM>1)
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*A^=lo; *B^=hi;
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#else
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*A=lo; *B=hi;
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#endif
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#endif
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}
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// multiply and xor mix function, aka MUM
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static inline uint64_t _wymix(uint64_t A, uint64_t B){ _wymum(&A,&B); return A^B; }
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// endian macros
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#ifndef WYHASH_LITTLE_ENDIAN
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#ifdef TARGET_ORDER_IS_LITTLE
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#define WYHASH_LITTLE_ENDIAN 1
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#else
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#define WYHASH_LITTLE_ENDIAN 0
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#endif
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#endif
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// read functions
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#if (WYHASH_LITTLE_ENDIAN)
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static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return v;}
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static inline uint64_t _wyr4(const uint8_t *p) { uint32_t v; memcpy(&v, p, 4); return v;}
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#elif defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__clang__)
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static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return __builtin_bswap64(v);}
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static inline uint64_t _wyr4(const uint8_t *p) { uint32_t v; memcpy(&v, p, 4); return __builtin_bswap32(v);}
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#elif defined(_MSC_VER)
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static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return _byteswap_uint64(v);}
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static inline uint64_t _wyr4(const uint8_t *p) { uint32_t v; memcpy(&v, p, 4); return _byteswap_ulong(v);}
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#else
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static inline uint64_t _wyr8(const uint8_t *p) {
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uint64_t v; memcpy(&v, p, 8);
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return (((v >> 56) & 0xff)| ((v >> 40) & 0xff00)| ((v >> 24) & 0xff0000)| ((v >> 8) & 0xff000000)| ((v << 8) & 0xff00000000)| ((v << 24) & 0xff0000000000)| ((v << 40) & 0xff000000000000)| ((v << 56) & 0xff00000000000000));
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}
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static inline uint64_t _wyr4(const uint8_t *p) {
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uint32_t v; memcpy(&v, p, 4);
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return (((v >> 24) & 0xff)| ((v >> 8) & 0xff00)| ((v << 8) & 0xff0000)| ((v << 24) & 0xff000000));
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}
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#endif
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static inline uint64_t _wyr3(const uint8_t *p, size_t k) { return (((uint64_t)p[0])<<16)|(((uint64_t)p[k>>1])<<8)|p[k-1];}
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// wyhash main function
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static inline uint64_t wyhash(const void *key, size_t len, uint64_t seed, const uint64_t *secret){
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const uint8_t *p=(const uint8_t *)key; seed^=*secret; uint64_t a, b;
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if (_likely_(len<=16)) {
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if (_likely_(len>=4)) { a=(_wyr4(p)<<32)|_wyr4(p+((len>>3)<<2)); b=(_wyr4(p+len-4)<<32)|_wyr4(p+len-4-((len>>3)<<2)); }
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else if (_likely_(len>0)) { a=_wyr3(p,len); b=0; }
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else a=b=0;
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} else {
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size_t i=len;
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if (_unlikely_(i>48)) {
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uint64_t see1=seed, see2=seed;
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do {
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seed=_wymix(_wyr8(p)^secret[1],_wyr8(p+8)^seed);
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see1=_wymix(_wyr8(p+16)^secret[2],_wyr8(p+24)^see1);
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see2=_wymix(_wyr8(p+32)^secret[3],_wyr8(p+40)^see2);
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p+=48; i-=48;
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} while(_likely_(i>48));
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seed^=see1^see2;
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}
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while(_unlikely_(i>16)) { seed=_wymix(_wyr8(p)^secret[1],_wyr8(p+8)^seed); i-=16; p+=16; }
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a=_wyr8(p+i-16); b=_wyr8(p+i-8);
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}
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return _wymix(secret[1]^len,_wymix(a^secret[1],b^seed));
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}
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// the default secret parameters
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static const uint64_t _wyp[4] = {0xa0761d6478bd642full, 0xe7037ed1a0b428dbull, 0x8ebc6af09c88c6e3ull, 0x589965cc75374cc3ull};
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// a useful 64bit-64bit mix function to produce deterministic pseudo random numbers that can pass BigCrush and PractRand
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static inline uint64_t wyhash64(uint64_t A, uint64_t B){ A^=0xa0761d6478bd642full; B^=0xe7037ed1a0b428dbull; _wymum(&A,&B); return _wymix(A^0xa0761d6478bd642full,B^0xe7037ed1a0b428dbull);}
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// the wyrand PRNG that pass BigCrush and PractRand
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static inline uint64_t wyrand(uint64_t *seed){ *seed+=0xa0761d6478bd642full; return _wymix(*seed,*seed^0xe7037ed1a0b428dbull);}
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#ifndef __vinix__
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// convert any 64 bit pseudo random numbers to uniform distribution [0,1). It can be combined with wyrand, wyhash64 or wyhash.
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static inline double wy2u01(uint64_t r){ const double _wynorm=1.0/(1ull<<52); return (r>>12)*_wynorm;}
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// convert any 64 bit pseudo random numbers to APPROXIMATE Gaussian distribution. It can be combined with wyrand, wyhash64 or wyhash.
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static inline double wy2gau(uint64_t r){ const double _wynorm=1.0/(1ull<<20); return ((r&0x1fffff)+((r>>21)&0x1fffff)+((r>>42)&0x1fffff))*_wynorm-3.0;}
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#endif
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#if(!WYHASH_32BIT_MUM)
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// fast range integer random number generation on [0,k) credit to Daniel Lemire. May not work when WYHASH_32BIT_MUM=1. It can be combined with wyrand, wyhash64 or wyhash.
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static inline uint64_t wy2u0k(uint64_t r, uint64_t k){ _wymum(&r,&k); return k; }
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#endif
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#endif
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#define _IN_MAP(val, m) map_exists(m, val)
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'
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