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[ceph.git] / ceph / src / civetweb / src / third_party / duktape-1.3.0 / src / duk_config.h
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7c673cae
FG		 1/*
2 * Determine platform features, select feature selection defines
3 * (e.g. _XOPEN_SOURCE), include system headers, and define DUK_USE_xxx
4 * defines which are (only) checked in Duktape internal code for
5 * activated features. Duktape feature selection is based on automatic
6 * feature detection, user supplied DUK_OPT_xxx defines, and optionally
7 * a "duk_custom.h" user header (if DUK_OPT_HAVE_CUSTOM_H is defined).
8 *
9 * When compiling Duktape, DUK_COMPILING_DUKTAPE is set, and this file
10 * is included before any system headers are included. Feature selection
11 * defines (e.g. _XOPEN_SOURCE) are defined here before any system headers
12 * are included (which is a requirement for system headers to work correctly).
13 * This file is responsible for including all system headers and contains
14 * all platform dependent cruft in general. When compiling user code,
15 * DUK_COMPILING_DUKTAPE is not defined, and we must avoid e.g. defining
16 * unnecessary feature selection defines.
17 *
18 * The general order of handling:
19 * - Compiler feature detection (require no includes)
20 * - Intermediate platform detection (-> easier platform defines)
21 * - Platform detection, system includes, byte order detection, etc
22 * - ANSI C wrappers (e.g. DUK_MEMCMP), wrappers for constants, etc
23 * - DUK_USE_xxx defines are resolved based on input defines
24 * - Duktape Date provider settings
25 * - Final sanity checks
26 *
27 * DUK_F_xxx are internal feature detection macros which should not be
28 * used outside this header.
29 *
30 * Useful resources:
31 *
32 * http://sourceforge.net/p/predef/wiki/Home/
33 * http://sourceforge.net/p/predef/wiki/Architectures/
34 * http://stackoverflow.com/questions/5919996/how-to-detect-reliably-mac-os-x-ios-linux-windows-in-c-preprocessor
35 * http://en.wikipedia.org/wiki/C_data_types#Fixed-width_integer_types
36 *
37 * Preprocessor defines available in a particular GCC:
38 *
39 * gcc -dM -E - </dev/null # http://www.brain-dump.org/blog/entry/107
40 */
41
42#ifndef DUK_CONFIG_H_INCLUDED
43#define DUK_CONFIG_H_INCLUDED
44
45/*
46 * Compiler features
47 */
48
49#undef DUK_F_C99
50#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
51#define DUK_F_C99
52#endif
53
54#undef DUK_F_CPP
55#if defined(__cplusplus)
56#define DUK_F_CPP
57#endif
58
59#undef DUK_F_CPP11
60#if defined(__cplusplus) && (__cplusplus >= 201103L)
61#define DUK_F_CPP11
62#endif
63
64/*
65 * Provides the duk_rdtsc() inline function (if available), limited to
66 * GCC C99.
67 *
68 * See: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
69 */
70
71/* XXX: more accurate detection of what gcc versions work; more inline
72 * asm versions for other compilers.
73 */
74#if defined(__GNUC__) && defined(__i386__) && defined(DUK_F_C99) && \
75 !defined(__cplusplus) /* unsigned long long not standard */
76static __inline__ unsigned long long duk_rdtsc(void) {
77 unsigned long long int x;
78 __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
79 return x;
80}
81#define DUK_USE_RDTSC() duk_rdtsc()
82#elif defined(__GNUC__) && defined(__x86_64__) && defined(DUK_F_C99) && \
83 !defined(__cplusplus) /* unsigned long long not standard */
84static __inline__ unsigned long long duk_rdtsc(void) {
85 unsigned hi, lo;
86 __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
87 return ((unsigned long long) lo) | (((unsigned long long) hi) << 32);
88}
89#define DUK_USE_RDTSC() duk_rdtsc()
90#else
91/* not available */
92#undef DUK_USE_RDTSC
93#endif
94
95/*
96 * Intermediate platform, architecture, and compiler detection. These are
97 * hopelessly intertwined - e.g. architecture defines depend on compiler etc.
98 *
99 * Provide easier defines for platforms and compilers which are often tricky
100 * or verbose to detect. The intent is not to provide intermediate defines for
101 * all features; only if existing feature defines are inconvenient.
102 */
103
104/* Intel x86 (32-bit) */
105#if defined(i386) || defined(__i386) || defined(__i386__) || \
106 defined(__i486__) || defined(__i586__) || defined(__i686__) || \
107 defined(__IA32__) || defined(_M_IX86) || defined(__X86__) || \
108 defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__)
109#define DUK_F_X86
110#endif
111
112/* AMD64 (64-bit) */
113#if defined(__amd64__) || defined(__amd64) || \
114 defined(__x86_64__) || defined(__x86_64) || \
115 defined(_M_X64) || defined(_M_AMD64)
116#define DUK_F_X64
117#endif
118
119/* X32: 64-bit with 32-bit pointers (allows packed tvals). X32 support is
120 * not very mature yet.
121 *
122 * https://sites.google.com/site/x32abi/
123 */
124#if defined(DUK_F_X64) && \
125 (defined(_ILP32) || defined(__ILP32__))
126#define DUK_F_X32
127/* define only one of: DUK_F_X86, DUK_F_X32, or DUK_F_X64 */
128#undef DUK_F_X64
129#undef DUK_F_X86
130#endif
131
132/* ARM */
133#if defined(__arm__) || defined(__thumb__) || defined(_ARM) || defined(_M_ARM)
134#define DUK_F_ARM
135#endif
136
137/* MIPS */
138/* Related defines: __MIPSEB__, __MIPSEL__, __mips_isa_rev, __LP64__ */
139#if defined(__mips__) || defined(mips) || defined(_MIPS_ISA) || \
140 defined(_R3000) || defined(_R4000) || defined(_R5900) || \
141 defined(_MIPS_ISA_MIPS1) || defined(_MIPS_ISA_MIPS2) || \
142 defined(_MIPS_ISA_MIPS3) || defined(_MIPS_ISA_MIPS4) || \
143 defined(__mips) || defined(__MIPS__)
144#define DUK_F_MIPS
145#if defined(__LP64__) || defined(__mips64) || defined(__mips64__) || \
146 defined(__mips_n64)
147#define DUK_F_MIPS64
148#else
149#define DUK_F_MIPS32
150#endif
151#endif
152
153/* SuperH */
154#if defined(__sh__) || \
155 defined(__sh1__) || defined(__SH1__) || \
156 defined(__sh2__) || defined(__SH2__) || \
157 defined(__sh3__) || defined(__SH3__) || \
158 defined(__sh4__) || defined(__SH4__) || \
159 defined(__sh5__) || defined(__SH5__)
160#define DUK_F_SUPERH
161#endif
162
163/* Motorola 68K. Not defined by VBCC, so user must define one of these
164 * manually when using VBCC.
165 */
166#if defined(__m68k__) || defined(M68000) || defined(__MC68K__)
167#define DUK_F_M68K
168#endif
169
170/* PowerPC */
171#if defined(__powerpc) || defined(__powerpc__) || defined(__PPC__)
172#define DUK_F_PPC
173#if defined(__PPC64__)
174#define DUK_F_PPC64
175#else
176#define DUK_F_PPC32
177#endif
178#endif
179
180/* Linux */
181#if defined(__linux) || defined(__linux__) || defined(linux)
182#define DUK_F_LINUX
183#endif
184
185/* FreeBSD */
186#if defined(__FreeBSD__) || defined(__FreeBSD)
187#define DUK_F_FREEBSD
188#endif
189
190/* NetBSD */
191#if defined(__NetBSD__) || defined(__NetBSD)
192#define DUK_F_NETBSD
193#endif
194
195/* OpenBSD */
196#if defined(__OpenBSD__) || defined(__OpenBSD)
197#define DUK_F_OPENBSD
198#endif
199
200/* BSD variant */
201#if defined(DUK_F_FREEBSD) || defined(DUK_F_NETBSD) || defined(DUK_F_OPENBSD) || \
202 defined(__bsdi__) || defined(__DragonFly__)
203#define DUK_F_BSD
204#endif
205
206/* Generic Unix (includes Cygwin) */
207#if defined(__unix) || defined(__unix__) || defined(unix) || \
208 defined(DUK_F_LINUX) || defined(DUK_F_BSD)
209#define DUK_F_UNIX
210#endif
211
212/* Cygwin */
213#if defined(__CYGWIN__)
214#define DUK_F_CYGWIN
215#endif
216
217/* Windows (32-bit or above) */
218#if defined(_WIN32) || defined(WIN32) || defined(_WIN64) || defined(WIN64) || \
219 defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__)
220#define DUK_F_WINDOWS
221#endif
222
223#if defined(__APPLE__)
224#define DUK_F_APPLE
225#endif
226
227/* Atari ST TOS. __TOS__ defined by PureC (which doesn't work as a target now
228 * because int is 16-bit, to be fixed). No platform define in VBCC apparently,
229 * so to use with VBCC, user must define '__TOS__' manually.
230 */
231#if defined(__TOS__)
232#define DUK_F_TOS
233#endif
234
235/* AmigaOS. Neither AMIGA nor __amigaos__ is defined on VBCC, so user must
236 * define 'AMIGA' manually.
237 */
238#if defined(AMIGA) || defined(__amigaos__)
239#define DUK_F_AMIGAOS
240#endif
241
242/* Flash player (e.g. Crossbridge) */
243#if defined(__FLASHPLAYER__)
244#define DUK_F_FLASHPLAYER
245#endif
246
247/* Emscripten (provided explicitly by user), improve if possible */
248#if defined(EMSCRIPTEN)
249#define DUK_F_EMSCRIPTEN
250#endif
251
252/* QNX */
253#if defined(__QNX__)
254#define DUK_F_QNX
255#endif
256
257/* TI-Nspire (using Ndless) */
258#if defined(_TINSPIRE)
259#define DUK_F_TINSPIRE
260#endif
261
262/* GCC and GCC version convenience define. */
263#if defined(__GNUC__)
264#define DUK_F_GCC
265#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
266/* Convenience, e.g. gcc 4.5.1 == 40501; http://stackoverflow.com/questions/6031819/emulating-gccs-builtin-unreachable */
267#define DUK_F_GCC_VERSION (__GNUC__ * 10000L + __GNUC_MINOR__ * 100L + __GNUC_PATCHLEVEL__)
268#else
269#error cannot figure out gcc version
270#endif
271#endif
272
273/* Clang */
274#if defined(__clang__)
275#define DUK_F_CLANG
276/* It seems clang also defines __GNUC__, so undo the GCC detection. */
277#if defined(DUK_F_GCC)
278#undef DUK_F_GCC
279#endif
280#if defined(DUK_F_GCC_VERSION)
281#undef DUK_F_GCC_VERSION
282#endif
283#endif
284
285/* MSVC */
286#if defined(_MSC_VER)
287/* MSVC preprocessor defines: http://msdn.microsoft.com/en-us/library/b0084kay.aspx
288 * _MSC_FULL_VER includes the build number, but it has at least two formats, see e.g.
289 * BOOST_MSVC_FULL_VER in http://www.boost.org/doc/libs/1_52_0/boost/config/compiler/visualc.hpp
290 */
291#define DUK_F_MSVC
292#if defined(_MSC_FULL_VER)
293#if (_MSC_FULL_VER > 100000000)
294#define DUK_F_MSVC_FULL_VER _MSC_FULL_VER
295#else
296#define DUK_F_MSCV_FULL_VER (_MSC_FULL_VER * 10)
297#endif
298#endif
299#endif /* _MSC_VER */
300
301/* MinGW */
302#if defined(__MINGW32__) || defined(__MINGW64__)
303/* NOTE: Also GCC flags are detected (DUK_F_GCC etc). */
304#define DUK_F_MINGW
305#endif
306
307/* BCC (Bruce's C compiler): this is a "torture target" for compilation */
308#if defined(__BCC__) || defined(__BCC_VERSION__)
309#define DUK_F_BCC
310#endif
311
312#if defined(__VBCC__)
313#define DUK_F_VBCC
314#endif
315
316/*
317 * Platform detection, system includes, Date provider selection.
318 *
319 * Feature selection (e.g. _XOPEN_SOURCE) must happen before any system
320 * headers are included. This header should avoid providing any feature
321 * selection defines when compiling user code (only when compiling Duktape
322 * itself). If a feature selection option is required for user code to
323 * compile correctly (e.g. it is needed for type detection), it should
324 * probably be -checked- here, not defined here.
325 *
326 * Date provider selection seems a bit out-of-place here, but since
327 * the date headers and provider functions are heavily platform
328 * specific, there's little point in duplicating the platform if-else
329 * ladder. All platform specific Date provider functions are in
330 * duk_bi_date.c; here we provide appropriate #defines to enable them,
331 * and include all the necessary system headers so that duk_bi_date.c
332 * compiles. Date "providers" are:
333 *
334 * NOW = getting current time (required)
335 * TZO = getting local time offset (required)
336 * PRS = parse datetime (optional)
337 * FMT = format datetime (optional)
338 *
339 * There's a lot of duplication here, unfortunately, because many
340 * platforms have similar (but not identical) headers, Date providers,
341 * etc. The duplication could be removed by more complicated nested
342 * #ifdefs, but it would then be more difficult to make fixes which
343 * affect only a specific platform.
344 *
345 * XXX: add a way to provide custom functions to provide the critical
346 * primitives; this would be convenient when porting to unknown platforms
347 * (rather than muck with Duktape internals).
348 */
349
350#if defined(DUK_COMPILING_DUKTAPE) && \
351 (defined(DUK_F_LINUX) || defined(DUK_F_EMSCRIPTEN))
352/* A more recent Emscripten (2014-05) seems to lack "linux" environment
353 * defines, so check for Emscripten explicitly.
354 */
355#ifndef _POSIX_C_SOURCE
356#define _POSIX_C_SOURCE 200809L
357#endif
358#ifndef _GNU_SOURCE
359#define _GNU_SOURCE /* e.g. getdate_r */
360#endif
361#ifndef _XOPEN_SOURCE
362#define _XOPEN_SOURCE /* e.g. strptime */
363#endif
364#endif
365
366#if defined(DUK_F_QNX) && defined(DUK_COMPILING_DUKTAPE)
367/* See: /opt/qnx650/target/qnx6/usr/include/sys/platform.h */
368#define _XOPEN_SOURCE 600
369#define _POSIX_C_SOURCE 200112L
370#endif
371
372#undef DUK_F_MSVC_CRT_SECURE
373#if defined(DUK_F_WINDOWS) && defined(_MSC_VER)
374/* http://msdn.microsoft.com/en-us/library/8ef0s5kh.aspx
375 * http://msdn.microsoft.com/en-us/library/wd3wzwts.aspx
376 * Seem to be available since VS2005.
377 */
378#if (_MSC_VER >= 1400)
379/* VS2005+, secure CRT functions are preferred. Windows Store applications
380 * (and probably others) should use these.
381 */
382#define DUK_F_MSVC_CRT_SECURE
383#endif
384#if (_MSC_VER < 1700)
385/* VS2012+ has stdint.h, < VS2012 does not (but it's available for download). */
386#define DUK_F_NO_STDINT_H
387#endif
388/* Initial fix: disable secure CRT related warnings when compiling Duktape
389 * itself (must be defined before including Windows headers). Don't define
390 * for user code including duktape.h.
391 */
392#if defined(DUK_COMPILING_DUKTAPE) && !defined(_CRT_SECURE_NO_WARNINGS)
393#define _CRT_SECURE_NO_WARNINGS
394#endif
395#endif /* DUK_F_WINDOWS && _MSC_VER */
396
397#if defined(DUK_F_TOS) || defined(DUK_F_BCC)
398#define DUK_F_NO_STDINT_H
399#endif
400
401/* Workaround for older C++ compilers before including <inttypes.h>,
402 * see e.g.: https://sourceware.org/bugzilla/show_bug.cgi?id=15366
403 */
404#if defined(__cplusplus) && !defined(__STDC_LIMIT_MACROS)
405#define __STDC_LIMIT_MACROS
406#endif
407#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS)
408#define __STDC_CONSTANT_MACROS
409#endif
410
411#if defined(__APPLE__)
412/* Mac OSX, iPhone, Darwin */
413#define DUK_USE_DATE_NOW_GETTIMEOFDAY
414#define DUK_USE_DATE_TZO_GMTIME_R
415#define DUK_USE_DATE_PRS_STRPTIME
416#define DUK_USE_DATE_FMT_STRFTIME
417#include <TargetConditionals.h>
418#include <architecture/byte_order.h>
419#include <limits.h>
420#include <sys/param.h>
421#include <sys/time.h>
422#include <time.h>
423#elif defined(DUK_F_OPENBSD)
424/* http://www.monkey.org/openbsd/archive/ports/0401/msg00089.html */
425#define DUK_USE_DATE_NOW_GETTIMEOFDAY
426#define DUK_USE_DATE_TZO_GMTIME_R
427#define DUK_USE_DATE_PRS_STRPTIME
428#define DUK_USE_DATE_FMT_STRFTIME
429#include <sys/types.h>
430#include <sys/endian.h>
431#include <limits.h>
432#include <sys/param.h>
433#include <sys/time.h>
434#include <time.h>
435#elif defined(DUK_F_BSD)
436/* other BSD */
437#define DUK_USE_DATE_NOW_GETTIMEOFDAY
438#define DUK_USE_DATE_TZO_GMTIME_R
439#define DUK_USE_DATE_PRS_STRPTIME
440#define DUK_USE_DATE_FMT_STRFTIME
441#include <sys/types.h>
442#include <sys/endian.h>
443#include <limits.h>
444#include <sys/param.h>
445#include <sys/time.h>
446#include <time.h>
447#elif defined(DUK_F_TOS)
448/* Atari ST TOS */
449#define DUK_USE_DATE_NOW_TIME
450#define DUK_USE_DATE_TZO_GMTIME
451/* no parsing (not an error) */
452#define DUK_USE_DATE_FMT_STRFTIME
453#include <limits.h>
454#include <time.h>
455#elif defined(DUK_F_AMIGAOS)
456#if defined(DUK_F_M68K)
457/* AmigaOS on M68k */
458#define DUK_USE_DATE_NOW_TIME
459#define DUK_USE_DATE_TZO_GMTIME
460/* no parsing (not an error) */
461#define DUK_USE_DATE_FMT_STRFTIME
462#include <limits.h>
463#include <time.h>
464#elif defined(DUK_F_PPC)
465#define DUK_USE_DATE_NOW_GETTIMEOFDAY
466#define DUK_USE_DATE_TZO_GMTIME_R
467#define DUK_USE_DATE_PRS_STRPTIME
468#define DUK_USE_DATE_FMT_STRFTIME
469#include <limits.h>
470#include <time.h>
471#ifndef UINTPTR_MAX
472#define UINTPTR_MAX UINT_MAX
473#endif
474#else
475#error AmigaOS but not M68K/PPC, not supported now
476#endif
477#elif defined(DUK_F_WINDOWS)
478/* Windows 32-bit and 64-bit are currently the same. */
479/* MSVC does not have sys/param.h */
480#define DUK_USE_DATE_NOW_WINDOWS
481#define DUK_USE_DATE_TZO_WINDOWS
482/* Note: PRS and FMT are intentionally left undefined for now. This means
483 * there is no platform specific date parsing/formatting but there is still
484 * the ISO 8601 standard format.
485 */
486#if defined(DUK_COMPILING_DUKTAPE)
487#include <windows.h>
488#endif
489#include <limits.h>
490#elif defined(DUK_F_FLASHPLAYER)
491/* Crossbridge */
492#define DUK_USE_DATE_NOW_GETTIMEOFDAY
493#define DUK_USE_DATE_TZO_GMTIME_R
494#define DUK_USE_DATE_PRS_STRPTIME
495#define DUK_USE_DATE_FMT_STRFTIME
496#include <endian.h>
497#include <limits.h>
498#include <sys/param.h>
499#include <sys/time.h>
500#include <time.h>
501#elif defined(DUK_F_QNX)
502#define DUK_USE_DATE_NOW_GETTIMEOFDAY
503#define DUK_USE_DATE_TZO_GMTIME_R
504#define DUK_USE_DATE_PRS_STRPTIME
505#define DUK_USE_DATE_FMT_STRFTIME
506#include <sys/types.h>
507#include <limits.h>
508#include <sys/param.h>
509#include <sys/time.h>
510#include <time.h>
511#elif defined(DUK_F_TINSPIRE)
512#define DUK_USE_DATE_NOW_GETTIMEOFDAY
513#define DUK_USE_DATE_TZO_GMTIME_R
514#define DUK_USE_DATE_PRS_STRPTIME
515#define DUK_USE_DATE_FMT_STRFTIME
516#include <sys/types.h>
517#include <limits.h>
518#include <sys/param.h>
519#include <sys/time.h>
520#include <time.h>
521#elif defined(DUK_F_LINUX)
522#define DUK_USE_DATE_NOW_GETTIMEOFDAY
523#define DUK_USE_DATE_TZO_GMTIME_R
524#define DUK_USE_DATE_PRS_STRPTIME
525#define DUK_USE_DATE_FMT_STRFTIME
526#include <sys/types.h>
527#if defined(DUK_F_BCC)
528/* no endian.h */
529#else
530#include <endian.h>
531#endif /* DUK_F_BCC */
532#include <limits.h>
533#include <sys/param.h>
534#include <sys/time.h>
535#include <time.h>
536#elif defined(__posix)
537/* POSIX */
538#define DUK_USE_DATE_NOW_GETTIMEOFDAY
539#define DUK_USE_DATE_TZO_GMTIME_R
540#define DUK_USE_DATE_PRS_STRPTIME
541#define DUK_USE_DATE_FMT_STRFTIME
542#include <sys/types.h>
543#include <endian.h>
544#include <limits.h>
545#include <sys/param.h>
546#include <sys/time.h>
547#include <time.h>
548#elif defined(DUK_F_CYGWIN)
549/* Cygwin -- don't use strptime() for now */
550#define DUK_USE_DATE_NOW_GETTIMEOFDAY
551#define DUK_USE_DATE_TZO_GMTIME_R
552#define DUK_USE_DATE_FMT_STRFTIME
553#include <sys/types.h>
554#include <endian.h>
555#include <limits.h>
556#include <sys/param.h>
557#include <sys/time.h>
558#include <time.h>
559#else
560/* Other UNIX, hopefully others */
561#define DUK_USE_DATE_NOW_GETTIMEOFDAY
562#define DUK_USE_DATE_TZO_GMTIME_R
563#define DUK_USE_DATE_PRS_STRPTIME
564#define DUK_USE_DATE_FMT_STRFTIME
565#include <sys/types.h>
566#if defined(DUK_F_BCC)
567/* no endian.h */
568#else
569#include <endian.h>
570#endif /* DUK_F_BCC */
571#include <limits.h>
572#include <sys/param.h>
573#include <sys/time.h>
574#include <time.h>
575#endif
576
577/* Shared includes */
578#include <stdio.h>
579#include <stdlib.h>
580#include <string.h>
581#include <stdarg.h> /* varargs */
582#include <setjmp.h>
583#include <stddef.h> /* e.g. ptrdiff_t */
584#if defined(DUK_F_NO_STDINT_H)
585/* stdint.h not available */
586#else
587/* Technically C99 (C++11) but found in many systems. Note the workaround
588 * above for some C++ compilers (__STDC_LIMIT_MACROS etc).
589 */
590#include <stdint.h>
591#endif
592#include <math.h>
593
594#if (defined(DUK_F_C99) || defined(DUK_F_CPP11)) && \
595 !defined(DUK_F_BCC)
596/* ULL / LL preprocessor constants should be avoided because they're not
597 * always available. With suitable options, some compilers will support
598 * 64-bit integer types but won't support ULL / LL preprocessor constants.
599 * Assume C99/C++11 environments have these. However, BCC is nominally
600 * C99 but doesn't support these constants.
601 */
602#define DUK_F_ULL_CONSTS
603#endif
604
605/*
606 * Detection for specific libc variants (like uclibc) and other libc specific
607 * features. Potentially depends on the #includes above.
608 */
609
610#if defined(__UCLIBC__)
611#define DUK_F_UCLIBC
612#endif
613
614/*
615 * Wrapper typedefs and constants for integer types, also sanity check types.
616 *
617 * C99 typedefs are quite good but not always available, and we want to avoid
618 * forcibly redefining the C99 typedefs. So, there are Duktape wrappers for
619 * all C99 typedefs and Duktape code should only use these typedefs. Type
620 * detection when C99 is not supported is best effort and may end up detecting
621 * some types incorrectly.
622 *
623 * Pointer sizes are a portability problem: pointers to different types may
624 * have a different size and function pointers are very difficult to manage
625 * portably.
626 *
627 * http://en.wikipedia.org/wiki/C_data_types#Fixed-width_integer_types
628 *
629 * Note: there's an interesting corner case when trying to define minimum
630 * signed integer value constants which leads to the current workaround of
631 * defining e.g. -0x80000000 as (-0x7fffffffL - 1L). See doc/code-issues.txt
632 * for a longer discussion.
633 *
634 * Note: avoid typecasts and computations in macro integer constants as they
635 * can then no longer be used in macro relational expressions (such as
636 * #if DUK_SIZE_MAX < 0xffffffffUL). There is internal code which relies on
637 * being able to compare DUK_SIZE_MAX against a limit.
638 */
639
640/* XXX: add feature options to force basic types from outside? */
641
642#if !defined(INT_MAX)
643#error INT_MAX not defined
644#endif
645
646/* Check that architecture is two's complement, standard C allows e.g.
647 * INT_MIN to be -2**31+1 (instead of -2**31).
648 */
649#if defined(INT_MAX) && defined(INT_MIN)
650#if INT_MAX != -(INT_MIN + 1)
651#error platform does not seem complement of two
652#endif
653#else
654#error cannot check complement of two
655#endif
656
657/* Pointer size determination based on architecture.
658 * XXX: unsure about BCC correctness.
659 */
660#if defined(DUK_F_X86) || defined(DUK_F_X32) || \
661 defined(DUK_F_BCC) || \
662 (defined(__WORDSIZE) && (__WORDSIZE == 32))
663#define DUK_F_32BIT_PTRS
664#elif defined(DUK_F_X64) || \
665 (defined(__WORDSIZE) && (__WORDSIZE == 64))
666#define DUK_F_64BIT_PTRS
667#else
668/* not sure, not needed with C99 anyway */
669#endif
670
671/* Intermediate define for 'have inttypes.h' */
672#undef DUK_F_HAVE_INTTYPES
673#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
674 !(defined(DUK_F_AMIGAOS) && defined(DUK_F_VBCC))
675/* vbcc + AmigaOS has C99 but no inttypes.h */
676#define DUK_F_HAVE_INTTYPES
677#elif defined(__cplusplus) && (__cplusplus >= 201103L)
678/* C++11 apparently ratified stdint.h */
679#define DUK_F_HAVE_INTTYPES
680#endif
681
682/* Basic integer typedefs and limits, preferably from inttypes.h, otherwise
683 * through automatic detection.
684 */
685#if defined(DUK_F_HAVE_INTTYPES)
686/* C99 or compatible */
687
688#define DUK_F_HAVE_64BIT
689#include <inttypes.h>
690
691typedef uint8_t duk_uint8_t;
692typedef int8_t duk_int8_t;
693typedef uint16_t duk_uint16_t;
694typedef int16_t duk_int16_t;
695typedef uint32_t duk_uint32_t;
696typedef int32_t duk_int32_t;
697typedef uint64_t duk_uint64_t;
698typedef int64_t duk_int64_t;
699typedef uint_least8_t duk_uint_least8_t;
700typedef int_least8_t duk_int_least8_t;
701typedef uint_least16_t duk_uint_least16_t;
702typedef int_least16_t duk_int_least16_t;
703typedef uint_least32_t duk_uint_least32_t;
704typedef int_least32_t duk_int_least32_t;
705typedef uint_least64_t duk_uint_least64_t;
706typedef int_least64_t duk_int_least64_t;
707typedef uint_fast8_t duk_uint_fast8_t;
708typedef int_fast8_t duk_int_fast8_t;
709typedef uint_fast16_t duk_uint_fast16_t;
710typedef int_fast16_t duk_int_fast16_t;
711typedef uint_fast32_t duk_uint_fast32_t;
712typedef int_fast32_t duk_int_fast32_t;
713typedef uint_fast64_t duk_uint_fast64_t;
714typedef int_fast64_t duk_int_fast64_t;
715typedef uintptr_t duk_uintptr_t;
716typedef intptr_t duk_intptr_t;
717typedef uintmax_t duk_uintmax_t;
718typedef intmax_t duk_intmax_t;
719
720#define DUK_UINT8_MIN 0
721#define DUK_UINT8_MAX UINT8_MAX
722#define DUK_INT8_MIN INT8_MIN
723#define DUK_INT8_MAX INT8_MAX
724#define DUK_UINT_LEAST8_MIN 0
725#define DUK_UINT_LEAST8_MAX UINT_LEAST8_MAX
726#define DUK_INT_LEAST8_MIN INT_LEAST8_MIN
727#define DUK_INT_LEAST8_MAX INT_LEAST8_MAX
728#define DUK_UINT_FAST8_MIN 0
729#define DUK_UINT_FAST8_MAX UINT_FAST8_MAX
730#define DUK_INT_FAST8_MIN INT_FAST8_MIN
731#define DUK_INT_FAST8_MAX INT_FAST8_MAX
732#define DUK_UINT16_MIN 0
733#define DUK_UINT16_MAX UINT16_MAX
734#define DUK_INT16_MIN INT16_MIN
735#define DUK_INT16_MAX INT16_MAX
736#define DUK_UINT_LEAST16_MIN 0
737#define DUK_UINT_LEAST16_MAX UINT_LEAST16_MAX
738#define DUK_INT_LEAST16_MIN INT_LEAST16_MIN
739#define DUK_INT_LEAST16_MAX INT_LEAST16_MAX
740#define DUK_UINT_FAST16_MIN 0
741#define DUK_UINT_FAST16_MAX UINT_FAST16_MAX
742#define DUK_INT_FAST16_MIN INT_FAST16_MIN
743#define DUK_INT_FAST16_MAX INT_FAST16_MAX
744#define DUK_UINT32_MIN 0
745#define DUK_UINT32_MAX UINT32_MAX
746#define DUK_INT32_MIN INT32_MIN
747#define DUK_INT32_MAX INT32_MAX
748#define DUK_UINT_LEAST32_MIN 0
749#define DUK_UINT_LEAST32_MAX UINT_LEAST32_MAX
750#define DUK_INT_LEAST32_MIN INT_LEAST32_MIN
751#define DUK_INT_LEAST32_MAX INT_LEAST32_MAX
752#define DUK_UINT_FAST32_MIN 0
753#define DUK_UINT_FAST32_MAX UINT_FAST32_MAX
754#define DUK_INT_FAST32_MIN INT_FAST32_MIN
755#define DUK_INT_FAST32_MAX INT_FAST32_MAX
756#define DUK_UINT64_MIN 0
757#define DUK_UINT64_MAX UINT64_MAX
758#define DUK_INT64_MIN INT64_MIN
759#define DUK_INT64_MAX INT64_MAX
760#define DUK_UINT_LEAST64_MIN 0
761#define DUK_UINT_LEAST64_MAX UINT_LEAST64_MAX
762#define DUK_INT_LEAST64_MIN INT_LEAST64_MIN
763#define DUK_INT_LEAST64_MAX INT_LEAST64_MAX
764#define DUK_UINT_FAST64_MIN 0
765#define DUK_UINT_FAST64_MAX UINT_FAST64_MAX
766#define DUK_INT_FAST64_MIN INT_FAST64_MIN
767#define DUK_INT_FAST64_MAX INT_FAST64_MAX
768
769#define DUK_UINTPTR_MIN 0
770#define DUK_UINTPTR_MAX UINTPTR_MAX
771#define DUK_INTPTR_MIN INTPTR_MIN
772#define DUK_INTPTR_MAX INTPTR_MAX
773
774#define DUK_UINTMAX_MIN 0
775#define DUK_UINTMAX_MAX UINTMAX_MAX
776#define DUK_INTMAX_MIN INTMAX_MIN
777#define DUK_INTMAX_MAX INTMAX_MAX
778
779#define DUK_SIZE_MIN 0
780#define DUK_SIZE_MAX SIZE_MAX
781#undef DUK_SIZE_MAX_COMPUTED
782
783#else /* C99 types */
784
785/* When C99 types are not available, we use heuristic detection to get
786 * the basic 8, 16, 32, and (possibly) 64 bit types. The fast/least
787 * types are then assumed to be exactly the same for now: these could
788 * be improved per platform but C99 types are very often now available.
789 * 64-bit types are not available on all platforms; this is OK at least
790 * on 32-bit platforms.
791 *
792 * This detection code is necessarily a bit hacky and can provide typedefs
793 * and defines that won't work correctly on some exotic platform.
794 */
795
796#if (defined(CHAR_BIT) && (CHAR_BIT == 8)) || \
797 (defined(UCHAR_MAX) && (UCHAR_MAX == 255))
798typedef unsigned char duk_uint8_t;
799typedef signed char duk_int8_t;
800#else
801#error cannot detect 8-bit type
802#endif
803
804#if defined(USHRT_MAX) && (USHRT_MAX == 65535UL)
805typedef unsigned short duk_uint16_t;
806typedef signed short duk_int16_t;
807#elif defined(UINT_MAX) && (UINT_MAX == 65535UL)
808/* On some platforms int is 16-bit but long is 32-bit (e.g. PureC) */
809typedef unsigned int duk_uint16_t;
810typedef signed int duk_int16_t;
811#else
812#error cannot detect 16-bit type
813#endif
814
815#if defined(UINT_MAX) && (UINT_MAX == 4294967295UL)
816typedef unsigned int duk_uint32_t;
817typedef signed int duk_int32_t;
818#elif defined(ULONG_MAX) && (ULONG_MAX == 4294967295UL)
819/* On some platforms int is 16-bit but long is 32-bit (e.g. PureC) */
820typedef unsigned long duk_uint32_t;
821typedef signed long duk_int32_t;
822#else
823#error cannot detect 32-bit type
824#endif
825
826/* 64-bit type detection is a bit tricky.
827 *
828 * ULLONG_MAX is a standard define. __LONG_LONG_MAX__ and __ULONG_LONG_MAX__
829 * are used by at least GCC (even if system headers don't provide ULLONG_MAX).
830 * Some GCC variants may provide __LONG_LONG_MAX__ but not __ULONG_LONG_MAX__.
831 *
832 * ULL / LL constants are rejected / warned about by some compilers, even if
833 * the compiler has a 64-bit type and the compiler/system headers provide an
834 * unsupported constant (ULL/LL)! Try to avoid using ULL / LL constants.
835 * As a side effect we can only check that e.g. ULONG_MAX is larger than 32
836 * bits but can't be sure it is exactly 64 bits. Self tests will catch such
837 * cases.
838 */
839#undef DUK_F_HAVE_64BIT
840#if !defined(DUK_F_HAVE_64BIT) && defined(ULONG_MAX)
841#if (ULONG_MAX > 4294967295UL)
842#define DUK_F_HAVE_64BIT
843typedef unsigned long duk_uint64_t;
844typedef signed long duk_int64_t;
845#endif
846#endif
847#if !defined(DUK_F_HAVE_64BIT) && defined(ULLONG_MAX)
848#if (ULLONG_MAX > 4294967295UL)
849#define DUK_F_HAVE_64BIT
850typedef unsigned long long duk_uint64_t;
851typedef signed long long duk_int64_t;
852#endif
853#endif
854#if !defined(DUK_F_HAVE_64BIT) && defined(__ULONG_LONG_MAX__)
855#if (__ULONG_LONG_MAX__ > 4294967295UL)
856#define DUK_F_HAVE_64BIT
857typedef unsigned long long duk_uint64_t;
858typedef signed long long duk_int64_t;
859#endif
860#endif
861#if !defined(DUK_F_HAVE_64BIT) && defined(__LONG_LONG_MAX__)
862#if (__LONG_LONG_MAX__ > 2147483647L)
863#define DUK_F_HAVE_64BIT
864typedef unsigned long long duk_uint64_t;
865typedef signed long long duk_int64_t;
866#endif
867#endif
868#if !defined(DUK_F_HAVE_64BIT) && \
869 (defined(DUK_F_MINGW) || defined(DUK_F_MSVC))
870/* Both MinGW and MSVC have a 64-bit type. */
871#define DUK_F_HAVE_64BIT
872typedef unsigned long duk_uint64_t;
873typedef signed long duk_int64_t;
874#endif
875#if !defined(DUK_F_HAVE_64BIT)
876/* cannot detect 64-bit type, not always needed so don't error */
877#endif
878
879typedef duk_uint8_t duk_uint_least8_t;
880typedef duk_int8_t duk_int_least8_t;
881typedef duk_uint16_t duk_uint_least16_t;
882typedef duk_int16_t duk_int_least16_t;
883typedef duk_uint32_t duk_uint_least32_t;
884typedef duk_int32_t duk_int_least32_t;
885typedef duk_uint8_t duk_uint_fast8_t;
886typedef duk_int8_t duk_int_fast8_t;
887typedef duk_uint16_t duk_uint_fast16_t;
888typedef duk_int16_t duk_int_fast16_t;
889typedef duk_uint32_t duk_uint_fast32_t;
890typedef duk_int32_t duk_int_fast32_t;
891#if defined(DUK_F_HAVE_64BIT)
892typedef duk_uint64_t duk_uint_least64_t;
893typedef duk_int64_t duk_int_least64_t;
894typedef duk_uint64_t duk_uint_fast64_t;
895typedef duk_int64_t duk_int_fast64_t;
896#endif
897#if defined(DUK_F_HAVE_64BIT)
898typedef duk_uint64_t duk_uintmax_t;
899typedef duk_int64_t duk_intmax_t;
900#else
901typedef duk_uint32_t duk_uintmax_t;
902typedef duk_int32_t duk_intmax_t;
903#endif
904
905/* Note: the funny looking computations for signed minimum 16-bit, 32-bit, and
906 * 64-bit values are intentional as the obvious forms (e.g. -0x80000000L) are
907 * -not- portable. See code-issues.txt for a detailed discussion.
908 */
909#define DUK_UINT8_MIN 0UL
910#define DUK_UINT8_MAX 0xffUL
911#define DUK_INT8_MIN (-0x80L)
912#define DUK_INT8_MAX 0x7fL
913#define DUK_UINT_LEAST8_MIN 0UL
914#define DUK_UINT_LEAST8_MAX 0xffUL
915#define DUK_INT_LEAST8_MIN (-0x80L)
916#define DUK_INT_LEAST8_MAX 0x7fL
917#define DUK_UINT_FAST8_MIN 0UL
918#define DUK_UINT_FAST8_MAX 0xffUL
919#define DUK_INT_FAST8_MIN (-0x80L)
920#define DUK_INT_FAST8_MAX 0x7fL
921#define DUK_UINT16_MIN 0UL
922#define DUK_UINT16_MAX 0xffffUL
923#define DUK_INT16_MIN (-0x7fffL - 1L)
924#define DUK_INT16_MAX 0x7fffL
925#define DUK_UINT_LEAST16_MIN 0UL
926#define DUK_UINT_LEAST16_MAX 0xffffUL
927#define DUK_INT_LEAST16_MIN (-0x7fffL - 1L)
928#define DUK_INT_LEAST16_MAX 0x7fffL
929#define DUK_UINT_FAST16_MIN 0UL
930#define DUK_UINT_FAST16_MAX 0xffffUL
931#define DUK_INT_FAST16_MIN (-0x7fffL - 1L)
932#define DUK_INT_FAST16_MAX 0x7fffL
933#define DUK_UINT32_MIN 0UL
934#define DUK_UINT32_MAX 0xffffffffUL
935#define DUK_INT32_MIN (-0x7fffffffL - 1L)
936#define DUK_INT32_MAX 0x7fffffffL
937#define DUK_UINT_LEAST32_MIN 0UL
938#define DUK_UINT_LEAST32_MAX 0xffffffffUL
939#define DUK_INT_LEAST32_MIN (-0x7fffffffL - 1L)
940#define DUK_INT_LEAST32_MAX 0x7fffffffL
941#define DUK_UINT_FAST32_MIN 0UL
942#define DUK_UINT_FAST32_MAX 0xffffffffUL
943#define DUK_INT_FAST32_MIN (-0x7fffffffL - 1L)
944#define DUK_INT_FAST32_MAX 0x7fffffffL
945
946/* 64-bit constants. Since LL / ULL constants are not always available,
947 * use computed values. These values can't be used in preprocessor
948 * comparisons; flag them as such.
949 */
950#if defined(DUK_F_HAVE_64BIT)
951#define DUK_UINT64_MIN ((duk_uint64_t) 0)
952#define DUK_UINT64_MAX ((duk_uint64_t) -1)
953#define DUK_INT64_MIN ((duk_int64_t) (~(DUK_UINT64_MAX >> 1)))
954#define DUK_INT64_MAX ((duk_int64_t) (DUK_UINT64_MAX >> 1))
955#define DUK_UINT_LEAST64_MIN DUK_UINT64_MIN
956#define DUK_UINT_LEAST64_MAX DUK_UINT64_MAX
957#define DUK_INT_LEAST64_MIN DUK_INT64_MIN
958#define DUK_INT_LEAST64_MAX DUK_INT64_MAX
959#define DUK_UINT_FAST64_MIN DUK_UINT64_MIN
960#define DUK_UINT_FAST64_MAX DUK_UINT64_MAX
961#define DUK_INT_FAST64_MIN DUK_INT64_MIN
962#define DUK_INT_FAST64_MAX DUK_INT64_MAX
963#define DUK_UINT64_MIN_COMPUTED
964#define DUK_UINT64_MAX_COMPUTED
965#define DUK_INT64_MIN_COMPUTED
966#define DUK_INT64_MAX_COMPUTED
967#define DUK_UINT_LEAST64_MIN_COMPUTED
968#define DUK_UINT_LEAST64_MAX_COMPUTED
969#define DUK_INT_LEAST64_MIN_COMPUTED
970#define DUK_INT_LEAST64_MAX_COMPUTED
971#define DUK_UINT_FAST64_MIN_COMPUTED
972#define DUK_UINT_FAST64_MAX_COMPUTED
973#define DUK_INT_FAST64_MIN_COMPUTED
974#define DUK_INT_FAST64_MAX_COMPUTED
975#endif
976
977#if defined(DUK_F_HAVE_64BIT)
978#define DUK_UINTMAX_MIN DUK_UINT64_MIN
979#define DUK_UINTMAX_MAX DUK_UINT64_MAX
980#define DUK_INTMAX_MIN DUK_INT64_MIN
981#define DUK_INTMAX_MAX DUK_INT64_MAX
982#define DUK_UINTMAX_MIN_COMPUTED
983#define DUK_UINTMAX_MAX_COMPUTED
984#define DUK_INTMAX_MIN_COMPUTED
985#define DUK_INTMAX_MAX_COMPUTED
986#else
987#define DUK_UINTMAX_MIN 0UL
988#define DUK_UINTMAX_MAX 0xffffffffUL
989#define DUK_INTMAX_MIN (-0x7fffffffL - 1L)
990#define DUK_INTMAX_MAX 0x7fffffffL
991#endif
992
993/* This detection is not very reliable. */
994#if defined(DUK_F_32BIT_PTRS)
995typedef duk_int32_t duk_intptr_t;
996typedef duk_uint32_t duk_uintptr_t;
997#define DUK_UINTPTR_MIN DUK_UINT32_MIN
998#define DUK_UINTPTR_MAX DUK_UINT32_MAX
999#define DUK_INTPTR_MIN DUK_INT32_MIN
1000#define DUK_INTPTR_MAX DUK_INT32_MAX
1001#elif defined(DUK_F_64BIT_PTRS) && defined(DUK_F_HAVE_64BIT)
1002typedef duk_int64_t duk_intptr_t;
1003typedef duk_uint64_t duk_uintptr_t;
1004#define DUK_UINTPTR_MIN DUK_UINT64_MIN
1005#define DUK_UINTPTR_MAX DUK_UINT64_MAX
1006#define DUK_INTPTR_MIN DUK_INT64_MIN
1007#define DUK_INTPTR_MAX DUK_INT64_MAX
1008#define DUK_UINTPTR_MIN_COMPUTED
1009#define DUK_UINTPTR_MAX_COMPUTED
1010#define DUK_INTPTR_MIN_COMPUTED
1011#define DUK_INTPTR_MAX_COMPUTED
1012#else
1013#error cannot determine intptr type
1014#endif
1015
1016/* SIZE_MAX may be missing so use an approximate value for it. */
1017#undef DUK_SIZE_MAX_COMPUTED
1018#if !defined(SIZE_MAX)
1019#define DUK_SIZE_MAX_COMPUTED
1020#define SIZE_MAX ((size_t) (-1))
1021#endif
1022#define DUK_SIZE_MIN 0
1023#define DUK_SIZE_MAX SIZE_MAX
1024
1025#endif /* C99 types */
1026
1027/* A few types are assumed to always exist. */
1028typedef size_t duk_size_t;
1029typedef ptrdiff_t duk_ptrdiff_t;
1030
1031/* The best type for an "all around int" in Duktape internals is "at least
1032 * 32 bit signed integer" which is most convenient. Same for unsigned type.
1033 * Prefer 'int' when large enough, as it is almost always a convenient type.
1034 */
1035#if defined(UINT_MAX) && (UINT_MAX >= 0xffffffffUL)
1036typedef int duk_int_t;
1037typedef unsigned int duk_uint_t;
1038#define DUK_INT_MIN INT_MIN
1039#define DUK_INT_MAX INT_MAX
1040#define DUK_UINT_MIN 0
1041#define DUK_UINT_MAX UINT_MAX
1042#else
1043typedef duk_int_fast32_t duk_int_t;
1044typedef duk_uint_fast32_t duk_uint_t;
1045#define DUK_INT_MIN DUK_INT_FAST32_MIN
1046#define DUK_INT_MAX DUK_INT_FAST32_MAX
1047#define DUK_UINT_MIN DUK_UINT_FAST32_MIN
1048#define DUK_UINT_MAX DUK_UINT_FAST32_MAX
1049#endif
1050
1051/* Same as 'duk_int_t' but guaranteed to be a 'fast' variant if this
1052 * distinction matters for the CPU. These types are used mainly in the
1053 * executor where it might really matter.
1054 */
1055typedef duk_int_fast32_t duk_int_fast_t;
1056typedef duk_uint_fast32_t duk_uint_fast_t;
1057#define DUK_INT_FAST_MIN DUK_INT_FAST32_MIN
1058#define DUK_INT_FAST_MAX DUK_INT_FAST32_MAX
1059#define DUK_UINT_FAST_MIN DUK_UINT_FAST32_MIN
1060#define DUK_UINT_FAST_MAX DUK_UINT_FAST32_MAX
1061
1062/* Small integers (16 bits or more) can fall back to the 'int' type, but
1063 * have a typedef so they are marked "small" explicitly.
1064 */
1065typedef int duk_small_int_t;
1066typedef unsigned int duk_small_uint_t;
1067#define DUK_SMALL_INT_MIN INT_MIN
1068#define DUK_SMALL_INT_MAX INT_MAX
1069#define DUK_SMALL_UINT_MIN 0
1070#define DUK_SMALL_UINT_MAX UINT_MAX
1071
1072/* Fast variants of small integers, again for really fast paths like the
1073 * executor.
1074 */
1075typedef duk_int_fast16_t duk_small_int_fast_t;
1076typedef duk_uint_fast16_t duk_small_uint_fast_t;
1077#define DUK_SMALL_INT_FAST_MIN DUK_INT_FAST16_MIN
1078#define DUK_SMALL_INT_FAST_MAX DUK_INT_FAST16_MAX
1079#define DUK_SMALL_UINT_FAST_MIN DUK_UINT_FAST16_MIN
1080#define DUK_SMALL_UINT_FAST_MAX DUK_UINT_FAST16_MAX
1081
1082/* Boolean values are represented with the platform 'int'. */
1083typedef duk_small_int_t duk_bool_t;
1084#define DUK_BOOL_MIN DUK_SMALL_INT_MIN
1085#define DUK_BOOL_MAX DUK_SMALL_INT_MAX
1086
1087/* Index values must have at least 32-bit signed range. */
1088typedef duk_int_t duk_idx_t;
1089#define DUK_IDX_MIN DUK_INT_MIN
1090#define DUK_IDX_MAX DUK_INT_MAX
1091
1092/* Array index values, could be exact 32 bits.
1093 * Currently no need for signed duk_arridx_t.
1094 */
1095typedef duk_uint_t duk_uarridx_t;
1096#define DUK_UARRIDX_MIN DUK_UINT_MIN
1097#define DUK_UARRIDX_MAX DUK_UINT_MAX
1098
1099/* Duktape/C function return value, platform int is enough for now to
1100 * represent 0, 1, or negative error code. Must be compatible with
1101 * assigning truth values (e.g. duk_ret_t rc = (foo == bar);).
1102 */
1103typedef duk_small_int_t duk_ret_t;
1104#define DUK_RET_MIN DUK_SMALL_INT_MIN
1105#define DUK_RET_MAX DUK_SMALL_INT_MAX
1106
1107/* Error codes are represented with platform int. High bits are used
1108 * for flags and such, so 32 bits are needed.
1109 */
1110typedef duk_int_t duk_errcode_t;
1111#define DUK_ERRCODE_MIN DUK_INT_MIN
1112#define DUK_ERRCODE_MAX DUK_INT_MAX
1113
1114/* Codepoint type. Must be 32 bits or more because it is used also for
1115 * internal codepoints. The type is signed because negative codepoints
1116 * are used as internal markers (e.g. to mark EOF or missing argument).
1117 * (X)UTF-8/CESU-8 encode/decode take and return an unsigned variant to
1118 * ensure duk_uint32_t casts back and forth nicely. Almost everything
1119 * else uses the signed one.
1120 */
1121typedef duk_int_t duk_codepoint_t;
1122typedef duk_uint_t duk_ucodepoint_t;
1123#define DUK_CODEPOINT_MIN DUK_INT_MIN
1124#define DUK_CODEPOINT_MAX DUK_INT_MAX
1125#define DUK_UCODEPOINT_MIN DUK_UINT_MIN
1126#define DUK_UCODEPOINT_MAX DUK_UINT_MAX
1127
1128/* IEEE float/double typedef. */
1129typedef float duk_float_t;
1130typedef double duk_double_t;
1131
1132/* We're generally assuming that we're working on a platform with a 32-bit
1133 * address space. If DUK_SIZE_MAX is a typecast value (which is necessary
1134 * if SIZE_MAX is missing), the check must be avoided because the
1135 * preprocessor can't do a comparison.
1136 */
1137#if !defined(DUK_SIZE_MAX)
1138#error DUK_SIZE_MAX is undefined, probably missing SIZE_MAX
1139#elif !defined(DUK_SIZE_MAX_COMPUTED)
1140#if DUK_SIZE_MAX < 0xffffffffUL
1141/* On some systems SIZE_MAX can be smaller than max unsigned 32-bit value
1142 * which seems incorrect if size_t is (at least) an unsigned 32-bit type.
1143 * However, it doesn't seem useful to error out compilation if this is the
1144 * case.
1145 */
1146#endif
1147#endif
1148
1149/* Type for public API calls. */
1150typedef struct duk_hthread duk_context;
1151
1152/*
1153 * Check whether we should use 64-bit integers
1154 */
1155
1156/* Quite incomplete now. Use 64-bit types if detected (C99 or other detection)
1157 * unless they are known to be unreliable. For instance, 64-bit types are
1158 * available on VBCC but seem to misbehave.
1159 */
1160#if defined(DUK_F_HAVE_64BIT) && !defined(DUK_F_VBCC)
1161#define DUK_USE_64BIT_OPS
1162#else
1163#undef DUK_USE_64BIT_OPS
1164#endif
1165
1166/*
1167 * Alignment requirement and support for unaligned accesses
1168 *
1169 * Assume unaligned accesses are not supported unless specifically allowed
1170 * in the target platform. Some platforms may support unaligned accesses
1171 * but alignment to 4 or 8 may still be desirable.
1172 */
1173
1174#undef DUK_USE_UNALIGNED_ACCESSES_POSSIBLE
1175#undef DUK_USE_ALIGN_BY
1176
1177#if defined(DUK_F_EMSCRIPTEN)
1178/* Required on at least some targets, so use whenever Emscripten used,
1179 * regardless of compilation target.
1180 */
1181#define DUK_USE_ALIGN_BY 8
1182#elif defined(DUK_F_ARM)
1183#define DUK_USE_ALIGN_BY 4
1184#elif defined(DUK_F_MIPS32)
1185/* Based on 'make checkalign' there are no alignment requirements on
1186 * Linux MIPS except for doubles, which need align by 4. Alignment
1187 * requirements vary based on target though.
1188 */
1189#define DUK_USE_ALIGN_BY 4
1190#elif defined(DUK_F_MIPS64)
1191/* Good default is a bit arbitrary because alignment requirements
1192 * depend on target. See https://github.com/svaarala/duktape/issues/102.
1193 */
1194#define DUK_USE_ALIGN_BY 8
1195#elif defined(DUK_F_SUPERH)
1196/* Based on 'make checkalign' there are no alignment requirements on
1197 * Linux SH4, but align by 4 is probably a good basic default.
1198 */
1199#define DUK_USE_ALIGN_BY 4
1200#elif defined(DUK_F_X86) || defined(DUK_F_X32) || defined(DUK_F_X64) || \
1201 defined(DUK_F_BCC)
1202/* XXX: This is technically not guaranteed because it's possible to configure
1203 * an x86 to require aligned accesses with Alignment Check (AC) flag.
1204 */
1205#define DUK_USE_ALIGN_BY 1
1206#define DUK_USE_UNALIGNED_ACCESSES_POSSIBLE
1207#else
1208/* Unknown, use safe default */
1209#define DUK_USE_ALIGN_BY 8
1210#endif
1211
1212/* User forced alignment to 4 or 8. */
1213#if defined(DUK_OPT_FORCE_ALIGN)
1214#undef DUK_USE_ALIGN_BY
1215#undef DUK_USE_UNALIGNED_ACCESSES_POSSIBLE
1216#if (DUK_OPT_FORCE_ALIGN == 4)
1217#define DUK_USE_ALIGN_BY 4
1218#elif (DUK_OPT_FORCE_ALIGN == 8)
1219#define DUK_USE_ALIGN_BY 8
1220#else
1221#error invalid DUK_OPT_FORCE_ALIGN value
1222#endif
1223#endif
1224
1225/* Compiler specific hackery needed to force struct size to match aligment,
1226 * see e.g. duk_hbuffer.h.
1227 *
1228 * http://stackoverflow.com/questions/11130109/c-struct-size-alignment
1229 * http://stackoverflow.com/questions/10951039/specifying-64-bit-alignment
1230 */
1231#if defined(DUK_F_MSVC)
1232#define DUK_USE_PACK_MSVC_PRAGMA
1233#elif defined(DUK_F_GCC)
1234#define DUK_USE_PACK_GCC_ATTR
1235#elif defined(DUK_F_CLANG)
1236#define DUK_USE_PACK_CLANG_ATTR
1237#else
1238#define DUK_USE_PACK_DUMMY_MEMBER
1239#endif
1240
1241#ifdef DUK_USE_UNALIGNED_ACCESSES_POSSIBLE
1242#define DUK_USE_HASHBYTES_UNALIGNED_U32_ACCESS
1243#else
1244#undef DUK_USE_HASHBYTES_UNALIGNED_U32_ACCESS
1245#endif
1246
1247/* Object property allocation layout has implications for memory and code
1248 * footprint and generated code size/speed. The best layout also depends
1249 * on whether the platform has alignment requirements or benefits from
1250 * having mostly aligned accesses.
1251 */
1252#undef DUK_USE_HOBJECT_LAYOUT_1
1253#undef DUK_USE_HOBJECT_LAYOUT_2
1254#undef DUK_USE_HOBJECT_LAYOUT_3
1255#if defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE) && (DUK_USE_ALIGN_BY == 1)
1256/* On platforms without any alignment issues, layout 1 is preferable
1257 * because it compiles to slightly less code and provides direct access
1258 * to property keys.
1259 */
1260#define DUK_USE_HOBJECT_LAYOUT_1
1261#else
1262/* On other platforms use layout 2, which requires some padding but
1263 * is a bit more natural than layout 3 in ordering the entries. Layout
1264 * 3 is currently not used.
1265 */
1266#define DUK_USE_HOBJECT_LAYOUT_2
1267#endif
1268
1269/*
1270 * Byte order and double memory layout detection
1271 *
1272 * Endianness detection is a major portability hassle because the macros
1273 * and headers are not standardized. There's even variance across UNIX
1274 * platforms. Even with "standard" headers, details like underscore count
1275 * varies between platforms, e.g. both __BYTE_ORDER and _BYTE_ORDER are used
1276 * (Crossbridge has a single underscore, for instance).
1277 *
1278 * The checks below are structured with this in mind: several approaches are
1279 * used, and at the end we check if any of them worked. This allows generic
1280 * approaches to be tried first, and platform/compiler specific hacks tried
1281 * last. As a last resort, the user can force a specific endianness, as it's
1282 * not likely that automatic detection will work on the most exotic platforms.
1283 *
1284 * Duktape supports little and big endian machines. There's also support
1285 * for a hybrid used by some ARM machines where integers are little endian
1286 * but IEEE double values use a mixed order (12345678 -> 43218765). This
1287 * byte order for doubles is referred to as "mixed endian".
1288 */
1289
1290#undef DUK_F_BYTEORDER
1291#undef DUK_USE_BYTEORDER_FORCED
1292
1293/* DUK_F_BYTEORDER is set as an intermediate value when detection
1294 * succeeds, to one of:
1295 * 1 = little endian
1296 * 2 = mixed (arm hybrid) endian
1297 * 3 = big endian
1298 */
1299
1300/* For custom platforms allow user to define byteorder explicitly.
1301 * Since endianness headers are not standardized, this is a useful
1302 * workaround for custom platforms for which endianness detection
1303 * is not directly supported. Perhaps custom hardware is used and
1304 * user cannot submit upstream patches.
1305 */
1306#if defined(DUK_OPT_FORCE_BYTEORDER)
1307#if (DUK_OPT_FORCE_BYTEORDER == 1)
1308#define DUK_F_BYTEORDER 1
1309#elif (DUK_OPT_FORCE_BYTEORDER == 2)
1310#define DUK_F_BYTEORDER 2
1311#elif (DUK_OPT_FORCE_BYTEORDER == 3)
1312#define DUK_F_BYTEORDER 3
1313#else
1314#error invalid DUK_OPT_FORCE_BYTEORDER value
1315#endif
1316#define DUK_USE_BYTEORDER_FORCED
1317#endif /* DUK_OPT_FORCE_BYTEORDER */
1318
1319/* More or less standard endianness predefines provided by header files.
1320 * The ARM hybrid case is detected by assuming that __FLOAT_WORD_ORDER
1321 * will be big endian, see: http://lists.mysql.com/internals/443.
1322 */
1323#if !defined(DUK_F_BYTEORDER)
1324#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && (__BYTE_ORDER == __LITTLE_ENDIAN) || \
1325 defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && (_BYTE_ORDER == _LITTLE_ENDIAN) || \
1326 defined(__LITTLE_ENDIAN__)
1327/* Integer little endian */
1328#if defined(__FLOAT_WORD_ORDER) && defined(__LITTLE_ENDIAN) && (__FLOAT_WORD_ORDER == __LITTLE_ENDIAN) || \
1329 defined(_FLOAT_WORD_ORDER) && defined(_LITTLE_ENDIAN) && (_FLOAT_WORD_ORDER == _LITTLE_ENDIAN)
1330#define DUK_F_BYTEORDER 1
1331#elif defined(__FLOAT_WORD_ORDER) && defined(__BIG_ENDIAN) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN) || \
1332 defined(_FLOAT_WORD_ORDER) && defined(_BIG_ENDIAN) && (_FLOAT_WORD_ORDER == _BIG_ENDIAN)
1333#define DUK_F_BYTEORDER 2
1334#elif !defined(__FLOAT_WORD_ORDER) && !defined(_FLOAT_WORD_ORDER)
1335/* Float word order not known, assume not a hybrid. */
1336#define DUK_F_BYTEORDER 1
1337#else
1338/* byte order is little endian but cannot determine IEEE double word order */
1339#endif /* float word order */
1340#elif defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && (__BYTE_ORDER == __BIG_ENDIAN) || \
1341 defined(_BYTE_ORDER) && defined(_BIG_ENDIAN) && (_BYTE_ORDER == _BIG_ENDIAN) || \
1342 defined(__BIG_ENDIAN__)
1343/* Integer big endian */
1344#if defined(__FLOAT_WORD_ORDER) && defined(__BIG_ENDIAN) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN) || \
1345 defined(_FLOAT_WORD_ORDER) && defined(_BIG_ENDIAN) && (_FLOAT_WORD_ORDER == _BIG_ENDIAN)
1346#define DUK_F_BYTEORDER 3
1347#elif !defined(__FLOAT_WORD_ORDER) && !defined(_FLOAT_WORD_ORDER)
1348/* Float word order not known, assume not a hybrid. */
1349#define DUK_F_BYTEORDER 3
1350#else
1351/* byte order is big endian but cannot determine IEEE double word order */
1352#endif /* float word order */
1353#else
1354/* cannot determine byte order */
1355#endif /* integer byte order */
1356#endif /* !defined(DUK_F_BYTEORDER) */
1357
1358/* GCC and Clang provide endianness defines as built-in predefines, with
1359 * leading and trailing double underscores (e.g. __BYTE_ORDER__). See
1360 * output of "make gccpredefs" and "make clangpredefs". Clang doesn't
1361 * seem to provide __FLOAT_WORD_ORDER__.
1362 * http://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html
1363 */
1364#if !defined(DUK_F_BYTEORDER) && defined(__BYTE_ORDER__)
1365#if defined(__ORDER_LITTLE_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
1366/* Integer little endian */
1367#if defined(__FLOAT_WORD_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
1368 (__FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__)
1369#define DUK_F_BYTEORDER 1
1370#elif defined(__FLOAT_WORD_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
1371 (__FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__)
1372#define DUK_F_BYTEORDER 2
1373#elif !defined(__FLOAT_WORD_ORDER__)
1374/* Float word order not known, assume not a hybrid. */
1375#define DUK_F_BYTEORDER 1
1376#else
1377/* byte order is little endian but cannot determine IEEE double word order */
1378#endif /* float word order */
1379#elif defined(__ORDER_BIG_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
1380/* Integer big endian */
1381#if defined(__FLOAT_WORD_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
1382 (__FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__)
1383#define DUK_F_BYTEORDER 3
1384#elif !defined(__FLOAT_WORD_ORDER__)
1385/* Float word order not known, assume not a hybrid. */
1386#define DUK_F_BYTEORDER 3
1387#else
1388/* byte order is big endian but cannot determine IEEE double word order */
1389#endif /* float word order */
1390#else
1391/* cannot determine byte order; __ORDER_PDP_ENDIAN__ is related to 32-bit
1392 * integer ordering and is not relevant
1393 */
1394#endif /* integer byte order */
1395#endif /* !defined(DUK_F_BYTEORDER) && defined(__BYTE_ORDER__) */
1396
1397/* Atari ST TOS */
1398#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_TOS)
1399#define DUK_F_BYTEORDER 3
1400#endif
1401
1402/* AmigaOS on M68K or PPC */
1403#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_AMIGAOS)
1404#if defined(DUK_F_M68K) || defined(DUK_F_PPC)
1405#define DUK_F_BYTEORDER 3
1406#endif
1407#endif
1408
1409/* On Windows, assume we're little endian. Even Itanium which has a
1410 * configurable endianness runs little endian in Windows.
1411 */
1412#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_WINDOWS)
1413/* XXX: verify that Windows on ARM is little endian for floating point
1414 * values too.
1415 */
1416#define DUK_F_BYTEORDER 1
1417#endif /* Windows */
1418
1419/* Crossbridge should work with the standard byteorder #ifdefs. It doesn't
1420 * provide _FLOAT_WORD_ORDER but the standard approach now covers that case
1421 * too. This has been left here just in case.
1422 */
1423#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_FLASHPLAYER)
1424#define DUK_F_BYTEORDER 1
1425#endif
1426
1427/* QNX gcc cross compiler seems to define e.g. __LITTLEENDIAN__ or __BIGENDIAN__:
1428 * $ /opt/qnx650/host/linux/x86/usr/bin/i486-pc-nto-qnx6.5.0-gcc -dM -E - </dev/null | grep -ni endian
1429 * 67:#define __LITTLEENDIAN__ 1
1430 * $ /opt/qnx650/host/linux/x86/usr/bin/mips-unknown-nto-qnx6.5.0-gcc -dM -E - </dev/null | grep -ni endian
1431 * 81:#define __BIGENDIAN__ 1
1432 * $ /opt/qnx650/host/linux/x86/usr/bin/arm-unknown-nto-qnx6.5.0-gcc -dM -E - </dev/null | grep -ni endian
1433 * 70:#define __LITTLEENDIAN__ 1
1434 */
1435#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_QNX)
1436/* XXX: ARM hybrid? */
1437#if defined(__LITTLEENDIAN__)
1438#define DUK_F_BYTEORDER 1
1439#elif defined(__BIGENDIAN__)
1440#define DUK_F_BYTEORDER 3
1441#endif
1442#endif
1443
1444/* Bruce's C Compiler (BCC), assume we're on x86. */
1445#if !defined(DUK_F_BYTEORDER) && defined(DUK_F_BCC)
1446#define DUK_F_BYTEORDER 1
1447#endif
1448
1449/* Check whether or not byte order detection worked based on the intermediate
1450 * define, and define final values. If detection failed, #error out.
1451 */
1452#if defined(DUK_F_BYTEORDER)
1453#if (DUK_F_BYTEORDER == 1)
1454#define DUK_USE_INTEGER_LE
1455#define DUK_USE_DOUBLE_LE
1456#elif (DUK_F_BYTEORDER == 2)
1457#define DUK_USE_INTEGER_LE /* integer endianness is little on purpose */
1458#define DUK_USE_DOUBLE_ME
1459#elif (DUK_F_BYTEORDER == 3)
1460#define DUK_USE_INTEGER_BE
1461#define DUK_USE_DOUBLE_BE
1462#else
1463#error unsupported: byte order detection failed (internal error, should not happen)
1464#endif /* byte order */
1465#else
1466#error unsupported: byte order detection failed
1467#endif /* defined(DUK_F_BYTEORDER) */
1468
1469/*
1470 * Check whether or not a packed duk_tval representation is possible.
1471 * What's basically required is that pointers are 32-bit values
1472 * (sizeof(void *) == 4). Best effort check, not always accurate.
1473 * If guess goes wrong, crashes may result; self tests also verify
1474 * the guess.
1475 */
1476
1477#undef DUK_USE_PACKED_TVAL_POSSIBLE
1478
1479/* Strict C99 case: DUK_UINTPTR_MAX (= UINTPTR_MAX) should be very reliable */
1480#if !defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_F_HAVE_INTTYPES) && defined(DUK_UINTPTR_MAX)
1481#if (DUK_UINTPTR_MAX <= 0xffffffffUL)
1482#define DUK_USE_PACKED_TVAL_POSSIBLE
1483#endif
1484#endif
1485
1486/* Non-C99 case, still relying on DUK_UINTPTR_MAX, as long as it is not a computed value */
1487#if !defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_UINTPTR_MAX) && !defined(DUK_UINTPTR_MAX_COMPUTED)
1488#if (DUK_UINTPTR_MAX <= 0xffffffffUL)
1489#define DUK_USE_PACKED_TVAL_POSSIBLE
1490#endif
1491#endif
1492
1493/* DUK_SIZE_MAX (= SIZE_MAX) is often reliable */
1494#if !defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_SIZE_MAX) && !defined(DUK_SIZE_MAX_COMPUTED)
1495#if DUK_SIZE_MAX <= 0xffffffffUL
1496#define DUK_USE_PACKED_TVAL_POSSIBLE
1497#endif
1498#endif
1499
1500/* M68K: packed always possible */
1501#if !defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_F_M68K)
1502#define DUK_USE_PACKED_TVAL_POSSIBLE
1503#endif
1504
1505/* PPC32: packed always possible */
1506#if !defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_F_PPC32)
1507#define DUK_USE_PACKED_TVAL_POSSIBLE
1508#endif
1509
1510/* With Emscripten, force unpacked duk_tval just to be safe, as it seems to
1511 * break at least on Firefox (probably IEEE double arithmetic is not 100%
1512 * supported, especially for NaNs).
1513 */
1514#if defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_F_EMSCRIPTEN)
1515#undef DUK_USE_PACKED_TVAL_POSSIBLE
1516#endif
1517
1518/* Microsoft Visual Studio 2010 on x64 fails the above rules and tries to
1519 * use a packed type. Force unpacked on x64 in general.
1520 */
1521#if defined(DUK_USE_PACKED_TVAL_POSSIBLE) && defined(DUK_F_X64)
1522#undef DUK_USE_PACKED_TVAL_POSSIBLE
1523#endif
1524
1525/* GCC/clang inaccurate math would break compliance and probably duk_tval,
1526 * so refuse to compile. Relax this if -ffast-math is tested to work.
1527 */
1528#if defined(__FAST_MATH__)
1529#error __FAST_MATH__ defined, refusing to compile
1530#endif
1531
1532/*
1533 * Detection of double constants and math related functions. Availability
1534 * of constants and math functions is a significant porting concern.
1535 *
1536 * INFINITY/HUGE_VAL is problematic on GCC-3.3: it causes an overflow warning
1537 * and there is no pragma in GCC-3.3 to disable it. Using __builtin_inf()
1538 * avoids this problem for some reason.
1539 */
1540
1541#define DUK_DOUBLE_2TO32 4294967296.0
1542#define DUK_DOUBLE_2TO31 2147483648.0
1543
1544#undef DUK_USE_COMPUTED_INFINITY
1545#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION < 40600)
1546/* GCC older than 4.6: avoid overflow warnings related to using INFINITY */
1547#define DUK_DOUBLE_INFINITY (__builtin_inf())
1548#elif defined(INFINITY)
1549#define DUK_DOUBLE_INFINITY ((double) INFINITY)
1550#elif !defined(DUK_F_VBCC) && !defined(DUK_F_MSVC) && !defined(DUK_F_BCC)
1551#define DUK_DOUBLE_INFINITY (1.0 / 0.0)
1552#else
1553/* In VBCC (1.0 / 0.0) results in a warning and 0.0 instead of infinity.
1554 * Use a computed infinity (initialized when a heap is created at the
1555 * latest).
1556 */
1557extern double duk_computed_infinity;
1558#define DUK_USE_COMPUTED_INFINITY
1559#define DUK_DOUBLE_INFINITY duk_computed_infinity
1560#endif
1561
1562#undef DUK_USE_COMPUTED_NAN
1563#if defined(NAN)
1564#define DUK_DOUBLE_NAN NAN
1565#elif !defined(DUK_F_VBCC) && !defined(DUK_F_MSVC) && !defined(DUK_F_BCC)
1566#define DUK_DOUBLE_NAN (0.0 / 0.0)
1567#else
1568/* In VBCC (0.0 / 0.0) results in a warning and 0.0 instead of NaN.
1569 * In MSVC (VS2010 Express) (0.0 / 0.0) results in a compile error.
1570 * Use a computed NaN (initialized when a heap is created at the
1571 * latest).
1572 */
1573extern double duk_computed_nan;
1574#define DUK_USE_COMPUTED_NAN
1575#define DUK_DOUBLE_NAN duk_computed_nan
1576#endif
1577
1578/* Many platforms are missing fpclassify() and friends, so use replacements
1579 * if necessary. The replacement constants (FP_NAN etc) can be anything but
1580 * match Linux constants now.
1581 */
1582#undef DUK_USE_REPL_FPCLASSIFY
1583#undef DUK_USE_REPL_SIGNBIT
1584#undef DUK_USE_REPL_ISFINITE
1585#undef DUK_USE_REPL_ISNAN
1586#undef DUK_USE_REPL_ISINF
1587
1588/* Complex condition broken into separate parts. */
1589#undef DUK_F_USE_REPL_ALL
1590#if !(defined(FP_NAN) && defined(FP_INFINITE) && defined(FP_ZERO) && \
1591 defined(FP_SUBNORMAL) && defined(FP_NORMAL))
1592/* Missing some obvious constants. */
1593#define DUK_F_USE_REPL_ALL
1594#elif defined(DUK_F_AMIGAOS) && defined(DUK_F_VBCC)
1595/* VBCC is missing the built-ins even in C99 mode (perhaps a header issue) */
1596#define DUK_F_USE_REPL_ALL
1597#elif defined(DUK_F_FREEBSD) && defined(DUK_F_CLANG)
1598/* Placeholder fix for (detection is wider than necessary):
1599 * http://llvm.org/bugs/show_bug.cgi?id=17788
1600 */
1601#define DUK_F_USE_REPL_ALL
1602#elif defined(DUK_F_UCLIBC)
1603/* At least some uclibc versions have broken floating point math. For
1604 * example, fpclassify() can incorrectly classify certain NaN formats.
1605 * To be safe, use replacements.
1606 */
1607#define DUK_F_USE_REPL_ALL
1608#endif
1609
1610#if defined(DUK_F_USE_REPL_ALL)
1611#define DUK_USE_REPL_FPCLASSIFY
1612#define DUK_USE_REPL_SIGNBIT
1613#define DUK_USE_REPL_ISFINITE
1614#define DUK_USE_REPL_ISNAN
1615#define DUK_USE_REPL_ISINF
1616#define DUK_FPCLASSIFY duk_repl_fpclassify
1617#define DUK_SIGNBIT duk_repl_signbit
1618#define DUK_ISFINITE duk_repl_isfinite
1619#define DUK_ISNAN duk_repl_isnan
1620#define DUK_ISINF duk_repl_isinf
1621#define DUK_FP_NAN 0
1622#define DUK_FP_INFINITE 1
1623#define DUK_FP_ZERO 2
1624#define DUK_FP_SUBNORMAL 3
1625#define DUK_FP_NORMAL 4
1626#else
1627#define DUK_FPCLASSIFY fpclassify
1628#define DUK_SIGNBIT signbit
1629#define DUK_ISFINITE isfinite
1630#define DUK_ISNAN isnan
1631#define DUK_ISINF isinf
1632#define DUK_FP_NAN FP_NAN
1633#define DUK_FP_INFINITE FP_INFINITE
1634#define DUK_FP_ZERO FP_ZERO
1635#define DUK_FP_SUBNORMAL FP_SUBNORMAL
1636#define DUK_FP_NORMAL FP_NORMAL
1637#endif
1638
1639#if defined(DUK_F_USE_REPL_ALL)
1640#undef DUK_F_USE_REPL_ALL
1641#endif
1642
1643/* Some math functions are C99 only. This is also an issue with some
1644 * embedded environments using uclibc where uclibc has been configured
1645 * not to provide some functions. For now, use replacements whenever
1646 * using uclibc.
1647 */
1648#undef DUK_USE_MATH_FMIN
1649#undef DUK_USE_MATH_FMAX
1650#undef DUK_USE_MATH_ROUND
1651#if defined(DUK_F_UCLIBC)
1652/* uclibc may be missing these */
1653#elif defined(DUK_F_AMIGAOS) && defined(DUK_F_VBCC)
1654/* vbcc + AmigaOS may be missing these */
1655#elif !defined(DUK_F_C99) && !defined(DUK_F_CPP11)
1656/* build is not C99 or C++11, play it safe */
1657#else
1658/* C99 or C++11, no known issues */
1659#define DUK_USE_MATH_FMIN
1660#define DUK_USE_MATH_FMAX
1661#define DUK_USE_MATH_ROUND
1662#endif
1663
1664/* These functions don't currently need replacement but are wrapped for
1665 * completeness. Because these are used as function pointers, they need
1666 * to be defined as concrete C functions (not macros).
1667 */
1668#define DUK_FABS fabs
1669#define DUK_FMIN fmin
1670#define DUK_FMAX fmax
1671#define DUK_FLOOR floor
1672#define DUK_CEIL ceil
1673#define DUK_FMOD fmod
1674#define DUK_POW pow
1675#define DUK_ACOS acos
1676#define DUK_ASIN asin
1677#define DUK_ATAN atan
1678#define DUK_ATAN2 atan2
1679#define DUK_SIN sin
1680#define DUK_COS cos
1681#define DUK_TAN tan
1682#define DUK_EXP exp
1683#define DUK_LOG log
1684#define DUK_SQRT sqrt
1685
1686/* NetBSD 6.0 x86 (at least) has a few problems with pow() semantics,
1687 * see test-bug-netbsd-math-pow.js. Use NetBSD specific workaround.
1688 * (This might be a wider problem; if so, generalize the define name.)
1689 */
1690#undef DUK_USE_POW_NETBSD_WORKAROUND
1691#if defined(DUK_F_NETBSD)
1692#define DUK_USE_POW_NETBSD_WORKAROUND
1693#endif
1694
1695/* Rely as little as possible on compiler behavior for NaN comparison,
1696 * signed zero handling, etc. Currently never activated but may be needed
1697 * for broken compilers.
1698 */
1699#undef DUK_USE_PARANOID_MATH
1700
1701/* There was a curious bug where test-bi-date-canceling.js would fail e.g.
1702 * on 64-bit Ubuntu, gcc-4.8.1, -m32, and no -std=c99. Some date computations
1703 * using doubles would be optimized which then broke some corner case tests.
1704 * The problem goes away by adding 'volatile' to the datetime computations.
1705 * Not sure what the actual triggering conditions are, but using this on
1706 * non-C99 systems solves the known issues and has relatively little cost
1707 * on other platforms. See bugs/issue-2e9d9c2d761dabaf8136c0897b91a270d1a47147.yaml.
1708 */
1709#undef DUK_USE_PARANOID_DATE_COMPUTATION
1710#if !defined(DUK_F_C99)
1711#define DUK_USE_PARANOID_DATE_COMPUTATION
1712#endif
1713
1714/*
1715 * ANSI C string/memory function wrapper defines to allow easier workarounds.
1716 * Also convenience macros like DUK_MEMZERO which may be mapped to existing
1717 * platform function to zero memory (like the deprecated bzero).
1718 *
1719 * For instance, some platforms don't support zero-size memcpy correctly,
1720 * some arcane uclibc versions have a buggy memcpy (but working memmove)
1721 * and so on. Such broken platforms can be dealt with here.
1722 *
1723 * NOTE: ANSI C (various versions) and some implementations require that the
1724 * pointer arguments to memset(), memcpy(), and memmove() be valid values
1725 * even when byte size is 0 (even a NULL pointer is considered invalid in
1726 * this context). Zero-size operations as such are allowed, as long as their
1727 * pointer arguments point to a valid memory area. The DUK_MEMSET(),
1728 * DUK_MEMCPY(), and DUK_MEMMOVE() macros require this same behavior, i.e.:
1729 * (1) pointers must be valid and non-NULL, (2) zero size must otherwise be
1730 * allowed. If these are not fulfilled, a macro wrapper is needed.
1731 *
1732 * http://stackoverflow.com/questions/5243012/is-it-guaranteed-to-be-safe-to-perform-memcpy0-0-0
1733 * http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-October/011065.html
1734 *
1735 * Not sure what's the required behavior when a pointer points just past the
1736 * end of a buffer, which often happens in practice (e.g. zero size memmoves).
1737 * For example, if allocation size is 3, the following pointer would not
1738 * technically point to a valid memory byte:
1739 *
1740 * <-- alloc -->
1741 * | 0 | 1 | 2 | .....
1742 * ^-- p=3, points after last valid byte (2)
1743 *
1744 * If this is a practical issue, wrappers are again needed.
1745 */
1746
1747typedef FILE duk_file;
1748#define DUK_STDIN stdin
1749#define DUK_STDOUT stdout
1750#define DUK_STDERR stderr
1751
1752/* Special naming to avoid conflict with e.g. DUK_FREE() in duk_heap.h
1753 * (which is unfortunately named).
1754 */
1755#define DUK_ANSI_MALLOC malloc
1756#define DUK_ANSI_REALLOC realloc
1757#define DUK_ANSI_CALLOC calloc
1758#define DUK_ANSI_FREE free
1759
1760/* Old uclibcs have a broken memcpy so use memmove instead (this is overly
1761 * wide now on purpose):
1762 * http://lists.uclibc.org/pipermail/uclibc-cvs/2008-October/025511.html
1763 */
1764#if defined(DUK_F_UCLIBC)
1765#define DUK_MEMCPY memmove
1766#else
1767#define DUK_MEMCPY memcpy
1768#endif
1769
1770#define DUK_MEMMOVE memmove
1771#define DUK_MEMCMP memcmp
1772#define DUK_MEMSET memset
1773#define DUK_STRLEN strlen
1774#define DUK_STRCMP strcmp
1775#define DUK_STRNCMP strncmp
1776#define DUK_PRINTF printf
1777#define DUK_FPRINTF fprintf
1778#define DUK_SPRINTF sprintf
1779
1780#if defined(DUK_F_MSVC)
1781/* _snprintf() does NOT NUL terminate on truncation, but Duktape code never
1782 * assumes that.
1783 * http://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010
1784 */
1785#define DUK_SNPRINTF _snprintf
1786#else
1787#define DUK_SNPRINTF snprintf
1788#endif
1789
1790#define DUK_VSPRINTF vsprintf
1791
1792#if defined(DUK_F_MSVC)
1793#if (_MSC_VER < 1600)
1794/* Older MSVC version are missing vsnprintf() but have _vsnprintf(). */
1795#define DUK_VSNPRINTF _vsnprintf
1796#else
1797#define DUK_VSNPRINTF vsnprintf
1798#endif
1799#else
1800#define DUK_VSNPRINTF vsnprintf
1801#endif /* DUK_F_MSVC */
1802
1803#define DUK_SSCANF sscanf
1804#define DUK_VSSCANF vsscanf
1805#define DUK_FOPEN fopen
1806#define DUK_FCLOSE fclose
1807#define DUK_FREAD fread
1808#define DUK_FWRITE fwrite
1809#define DUK_FSEEK fseek
1810#define DUK_FTELL ftell
1811#define DUK_FFLUSH fflush
1812#define DUK_FPUTC fputc
1813
1814#define DUK_MEMZERO(p,n) \
1815 DUK_MEMSET((p), 0, (n))
1816
1817/*
1818 * Vararg macro wrappers. We need va_copy() which is defined in C99 / C++11,
1819 * so an awkward replacement is needed for pre-C99 / pre-C++11 environments.
1820 * This will quite likely need portability hacks for some non-C99 environments.
1821 */
1822
1823#if defined(DUK_F_C99) || defined(DUK_F_CPP11)
1824/* C99 / C++11 and above: rely on va_copy() which is required.
1825 * Omit parenthesis on macro right side on purpose to minimize differences
1826 * to direct use.
1827 */
1828#define DUK_VA_COPY(dest,src) va_copy(dest,src)
1829#elif defined(DUK_F_GCC) || defined(DUK_F_CLANG)
1830/* GCC: assume we have __va_copy() in non-C99 mode, which should be correct
1831 * for even quite old GCC versions. Clang matches GCC behavior.
1832 */
1833#define DUK_VA_COPY(dest,src) __va_copy(dest,src)
1834#else
1835/* Pre-C99: va_list type is implementation dependent. This replacement
1836 * assumes it is a plain value so that a simple assignment will work.
1837 * This is not the case on all platforms (it may be a single-array element,
1838 * for instance).
1839 */
1840#define DUK_VA_COPY(dest,src) do { (dest) = (src); } while (0)
1841#endif
1842
1843/*
1844 * Miscellaneous ANSI C or other platform wrappers.
1845 */
1846
1847#define DUK_ABORT abort
1848#define DUK_EXIT exit
1849
1850/*
1851 * Avoiding platform function pointers.
1852 *
1853 * On some platforms built-in functions may be implemented as macros or
1854 * inline functions, so they can't be necessarily addressed by function
1855 * pointers. This is certainly the case with some platform "polyfills"
1856 * which provide missing C99/C++11 functions through macros, and may be
1857 * the case with VS2013 (see GH-17).
1858 */
1859
1860/* This is now the default: the cost in footprint is negligible. */
1861#define DUK_USE_AVOID_PLATFORM_FUNCPTRS
1862
1863/*
1864 * Macro hackery to convert e.g. __LINE__ to a string without formatting,
1865 * see: http://stackoverflow.com/questions/240353/convert-a-preprocessor-token-to-a-string
1866 */
1867
1868#define DUK_F_STRINGIFY_HELPER(x) #x
1869#define DUK_MACRO_STRINGIFY(x) DUK_F_STRINGIFY_HELPER(x)
1870
1871/*
1872 * Cause segfault macro.
1873 *
1874 * This is optionally used by panic handling to cause the program to segfault
1875 * (instead of e.g. abort()) on panic. Valgrind will then indicate the C
1876 * call stack leading to the panic.
1877 */
1878
1879#define DUK_CAUSE_SEGFAULT() do { \
1880 *((volatile duk_uint32_t *) NULL) = (duk_uint32_t) 0xdeadbeefUL; \
1881 } while (0)
1882
1883/*
1884 * Macro for suppressing warnings for potentially unreferenced variables.
1885 * The variables can be actually unreferenced or unreferenced in some
1886 * specific cases only; for instance, if a variable is only debug printed,
1887 * it is unreferenced when debug printing is disabled.
1888 *
1889 * (Introduced here because it's potentially compiler specific.)
1890 */
1891
1892#define DUK_UNREF(x) do { \
1893 (void) (x); \
1894 } while (0)
1895
1896/*
1897 * DUK_NORETURN: macro for declaring a 'noreturn' function.
1898 * Unfortunately the noreturn declaration may appear in various
1899 * places of a function declaration, so the solution is to wrap
1900 * the entire declaration inside the macro. Compiler support
1901 * for using a noreturn declaration on function pointers varies;
1902 * this macro must only be used for actual function declarations.
1903 *
1904 * http://gcc.gnu.org/onlinedocs/gcc-4.3.2//gcc/Function-Attributes.html
1905 * http://clang.llvm.org/docs/LanguageExtensions.html
1906 */
1907
1908#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 20500L)
1909/* since gcc-2.5 */
1910#define DUK_NORETURN(decl) decl __attribute__((noreturn))
1911#elif defined(__clang__)
1912/* syntax same as gcc */
1913#define DUK_NORETURN(decl) decl __attribute__((noreturn))
1914#elif defined(DUK_F_MSVC)
1915/* http://msdn.microsoft.com/en-us/library/aa235362(VS.60).aspx */
1916#define DUK_NORETURN(decl) __declspec(noreturn) decl
1917#else
1918/* Don't know how to declare a noreturn function, so don't do it; this
1919 * may cause some spurious compilation warnings (e.g. "variable used
1920 * uninitialized").
1921 */
1922#define DUK_NORETURN(decl) decl
1923#endif
1924
1925/*
1926 * Macro for stating that a certain line cannot be reached.
1927 *
1928 * http://gcc.gnu.org/onlinedocs/gcc-4.5.0/gcc/Other-Builtins.html#Other-Builtins
1929 * http://clang.llvm.org/docs/LanguageExtensions.html
1930 */
1931
1932#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 40500L)
1933/* since gcc-4.5 */
1934#define DUK_UNREACHABLE() do { __builtin_unreachable(); } while(0)
1935#elif defined(__clang__) && defined(__has_builtin)
1936#if __has_builtin(__builtin_unreachable)
1937/* same as gcc */
1938#define DUK_UNREACHABLE() do { __builtin_unreachable(); } while(0)
1939#endif
1940#else
1941/* unknown */
1942#endif
1943
1944#if !defined(DUK_UNREACHABLE)
1945/* Don't know how to declare unreachable point, so don't do it; this
1946 * may cause some spurious compilation warnings (e.g. "variable used
1947 * uninitialized").
1948 */
1949#define DUK_UNREACHABLE() /* unreachable */
1950#endif
1951
1952/*
1953 * Likely and unlikely branches. Using these is not at all a clear cut case,
1954 * so the selection is a two-step process: (1) DUK_USE_BRANCH_HINTS is set
1955 * if the architecture, compiler etc make it useful to use the hints, and (2)
1956 * a separate check determines how to do them.
1957 *
1958 * These macros expect the argument to be a relational expression with an
1959 * integer value. If used with pointers, you should use an explicit check
1960 * like:
1961 *
1962 * if (DUK_LIKELY(ptr != NULL)) { ... }
1963 *
1964 * instead of:
1965 *
1966 * if (DUK_LIKELY(ptr)) { ... }
1967 *
1968 * http://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html (__builtin_expect)
1969 */
1970
1971/* pretty much a placeholder now */
1972#if defined(DUK_F_GCC)
1973#define DUK_USE_BRANCH_HINTS
1974#elif defined(DUK_F_CLANG)
1975#define DUK_USE_BRANCH_HINTS
1976#else
1977#undef DUK_USE_BRANCH_HINTS
1978#endif
1979
1980#if defined(DUK_USE_BRANCH_HINTS)
1981#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 40500L)
1982/* GCC: test not very accurate; enable only in relatively recent builds
1983 * because of bugs in gcc-4.4 (http://lists.debian.org/debian-gcc/2010/04/msg00000.html)
1984 */
1985#define DUK_LIKELY(x) __builtin_expect((x), 1)
1986#define DUK_UNLIKELY(x) __builtin_expect((x), 0)
1987#elif defined(DUK_F_CLANG)
1988#define DUK_LIKELY(x) __builtin_expect((x), 1)
1989#define DUK_UNLIKELY(x) __builtin_expect((x), 0)
1990#endif
1991#endif /* DUK_USE_BRANCH_HINTS */
1992
1993#if !defined(DUK_LIKELY)
1994#define DUK_LIKELY(x) (x)
1995#endif
1996#if !defined(DUK_UNLIKELY)
1997#define DUK_UNLIKELY(x) (x)
1998#endif
1999
2000/*
2001 * Function inlining control
2002 *
2003 * DUK_NOINLINE: avoid inlining a function.
2004 * DUK_INLINE: suggest inlining a function.
2005 * DUK_ALWAYS_INLINE: force inlining for critical functions.
2006 *
2007 * Apply to function definition only (not declaration).
2008 */
2009
2010#if defined(DUK_F_CLANG) && (defined(DUK_F_C99) || defined(DUK_F_CPP11))
2011#define DUK_NOINLINE __attribute__((noinline))
2012#define DUK_INLINE inline
2013#define DUK_ALWAYS_INLINE inline __attribute__((always_inline))
2014#elif defined(DUK_F_GCC) && defined(DUK_F_GCC_VERSION) && (defined(DUK_F_C99) || defined(DUK_F_CPP11))
2015#if (DUK_F_GCC_VERSION >= 30101)
2016#define DUK_NOINLINE __attribute__((noinline))
2017#define DUK_INLINE inline
2018#define DUK_ALWAYS_INLINE inline __attribute__((always_inline))
2019#endif
2020#endif
2021
2022#if !defined(DUK_NOINLINE)
2023#define DUK_NOINLINE /*nop*/
2024#define DUK_INLINE /*nop*/
2025#define DUK_ALWAYS_INLINE /*nop*/
2026#endif
2027
2028/* Temporary workaround for GH-323: avoid inlining control when
2029 * compiling from multiple sources, as it causes compiler trouble.
2030 */
2031#if !defined(DUK_SINGLE_FILE)
2032#undef DUK_NOINLINE
2033#undef DUK_INLINE
2034#undef DUK_ALWAYS_INLINE
2035#define DUK_NOINLINE /*nop*/
2036#define DUK_INLINE /*nop*/
2037#define DUK_ALWAYS_INLINE /*nop*/
2038#endif
2039
2040/*
2041 * Symbol visibility macros
2042 *
2043 * To avoid C++ declaration issues (see GH-63):
2044 *
2045 * - Don't use DUK_LOCAL_DECL for local -data symbols- so that you don't
2046 * end up with both a "static" declaration and a definition.
2047 *
2048 * - Wrap any DUK_INTERNAL_DECL with a '#if !defined(DUK_SINGLE_FILE)'
2049 * so that the internal declarations (which would map to "static" in
2050 * a single file distribution) get dropped.
2051 */
2052
2053/* XXX: user override for these? user override for just using the default visibility macros? */
2054/* XXX: separate macros for function and data may be necessary at some point. */
2055
2056#if defined(DUK_F_GCC_VERSION)
2057#if (DUK_F_GCC_VERSION >= 40000) && !(defined(DUK_F_MINGW) || defined(DUK_F_CYGWIN))
2058/* Might work on earlier versions too but limit to GCC 4+.
2059 * MinGW should use Windows specific __declspec or no visibility attributes at all,
2060 * otherwise: "warning: visibility attribute not supported in this configuration; ignored".
2061 * Same applies to Cygwin GCC.
2062 */
2063#define DUK_F_GCC_SYMBOL_VISIBILITY
2064#endif
2065#endif
2066#if defined(DUK_F_CLANG) && !defined(DUK_F_GCC_SYMBOL_VISIBILITY)
2067#define DUK_F_GCC_SYMBOL_VISIBILITY
2068#endif
2069#if defined(DUK_OPT_DLL_BUILD) && defined(_WIN32) && (defined(_MSC_VER) || defined(__GNUC__))
2070/* __declspec(dllexport) and __declspec(dllimport) only for Windows DLL build.
2071 * MSVC: any minimum version?
2072 * MinGW: no minimum version, even gcc-2.95.3 supported dllimport/dllexport.
2073*/
2074#define DUK_F_MSVC_DLL_SYMBOL_VISIBILITY
2075#endif
2076
2077#if defined(DUK_F_GCC_SYMBOL_VISIBILITY)
2078/* GCC 4+ visibility attributes. */
2079#define DUK_EXTERNAL_DECL __attribute__ ((visibility("default"))) extern
2080#define DUK_EXTERNAL __attribute__ ((visibility("default")))
2081#if defined(DUK_SINGLE_FILE)
2082#define DUK_INTERNAL_DECL static
2083#define DUK_INTERNAL static
2084#else
2085#define DUK_INTERNAL_DECL __attribute__ ((visibility("hidden"))) extern
2086#define DUK_INTERNAL __attribute__ ((visibility("hidden")))
2087#endif
2088#elif defined(DUK_F_MSVC_DLL_SYMBOL_VISIBILITY)
2089/* MSVC dllexport/dllimport: appropriate __declspec depends on whether we're
2090 * compiling Duktape or the application.
2091 */
2092#if defined(DUK_COMPILING_DUKTAPE)
2093#define DUK_EXTERNAL_DECL extern __declspec(dllexport)
2094#define DUK_EXTERNAL __declspec(dllexport)
2095#else
2096#define DUK_EXTERNAL_DECL extern __declspec(dllimport)
2097#define DUK_EXTERNAL should_not_happen
2098#endif
2099#if defined(DUK_SINGLE_FILE)
2100#define DUK_INTERNAL_DECL static
2101#define DUK_INTERNAL static
2102#else
2103#define DUK_INTERNAL_DECL extern
2104#define DUK_INTERNAL /*empty*/
2105#endif
2106#else
2107/* Default visibility. */
2108#define DUK_EXTERNAL_DECL extern
2109#define DUK_EXTERNAL /*empty*/
2110#if defined(DUK_SINGLE_FILE)
2111#define DUK_INTERNAL_DECL static
2112#define DUK_INTERNAL static
2113#else /* DUK_SINGLE_FILE */
2114#define DUK_INTERNAL_DECL extern
2115#define DUK_INTERNAL /*empty*/
2116#endif
2117#endif
2118
2119/* For now, these are shared. */
2120#define DUK_LOCAL_DECL static
2121#define DUK_LOCAL static
2122
2123/*
2124 * __FILE__, __LINE__, __func__ are wrapped. Especially __func__ is a
2125 * problem because it is not available even in some compilers which try
2126 * to be C99 compatible (e.g. VBCC with -c99 option).
2127 */
2128
2129#define DUK_FILE_MACRO __FILE__
2130
2131#define DUK_LINE_MACRO __LINE__
2132
2133#if !defined(DUK_F_VBCC) && !defined(DUK_F_MSVC)
2134#define DUK_FUNC_MACRO __func__
2135#else
2136#define DUK_FUNC_MACRO "unknown"
2137#endif
2138
2139/*
2140 * Byteswap macros
2141 *
2142 * These are here so that inline assembly or other platform functions can be
2143 * used if available.
2144 */
2145
2146#define DUK_BSWAP32(x) \
2147 ((((duk_uint32_t) (x)) >> 24) | \
2148 ((((duk_uint32_t) (x)) >> 8) & 0xff00UL) | \
2149 ((((duk_uint32_t) (x)) << 8) & 0xff0000UL) | \
2150 (((duk_uint32_t) (x)) << 24))
2151
2152#define DUK_BSWAP16(x) \
2153 ((duk_uint16_t) (x) >> 8) | \
2154 ((duk_uint16_t) (x) << 8)
2155
2156/*
2157 * Architecture string, human readable value exposed in Duktape.env
2158 */
2159
2160#if defined(DUK_F_X86)
2161#define DUK_USE_ARCH_STRING "x86"
2162#elif defined(DUK_F_X32)
2163#define DUK_USE_ARCH_STRING "x32"
2164#elif defined(DUK_F_X64)
2165#define DUK_USE_ARCH_STRING "x64"
2166#elif defined(DUK_F_ARM)
2167#define DUK_USE_ARCH_STRING "arm"
2168#elif defined(DUK_F_MIPS32)
2169#define DUK_USE_ARCH_STRING "mips32"
2170#elif defined(DUK_F_MIPS64)
2171#define DUK_USE_ARCH_STRING "mips64"
2172#elif defined(DUK_F_SUPERH)
2173#define DUK_USE_ARCH_STRING "sh"
2174#elif defined(DUK_F_PPC)
2175#define DUK_USE_ARCH_STRING "ppc"
2176#elif defined(DUK_F_M68K)
2177#define DUK_USE_ARCH_STRING "m68k"
2178#elif defined(DUK_F_FLASHPLAYER)
2179#define DUK_USE_ARCH_STRING "flashplayer"
2180#elif defined(DUK_F_EMSCRIPTEN)
2181#define DUK_USE_ARCH_STRING "emscripten"
2182#else
2183#define DUK_USE_ARCH_STRING "unknown"
2184#endif
2185
2186/*
2187 * OS string, human readable value exposed in Duktape.env
2188 */
2189
2190#if defined(DUK_F_LINUX)
2191#define DUK_USE_OS_STRING "linux"
2192#elif defined(__APPLE__)
2193/* http://stackoverflow.com/questions/5919996/how-to-detect-reliably-mac-os-x-ios-linux-windows-in-c-preprocessor */
2194#if TARGET_IPHONE_SIMULATOR
2195#define DUK_USE_OS_STRING "iphone-sim"
2196#elif TARGET_OS_IPHONE
2197#define DUK_USE_OS_STRING "iphone"
2198#elif TARGET_OS_MAC
2199#define DUK_USE_OS_STRING "ios"
2200#else
2201#define DUK_USE_OS_STRING "ios-unknown"
2202#endif
2203#elif defined(DUK_F_FREEBSD)
2204#define DUK_USE_OS_STRING "freebsd"
2205#elif defined(DUK_F_OPENBSD)
2206#define DUK_USE_OS_STRING "openbsd"
2207#elif defined(DUK_F_NETBSD)
2208#define DUK_USE_OS_STRING "netbsd"
2209#elif defined(DUK_F_BSD)
2210#define DUK_USE_OS_STRING "bsd"
2211#elif defined(DUK_F_UNIX)
2212#define DUK_USE_OS_STRING "unix"
2213#elif defined(DUK_F_WINDOWS)
2214#define DUK_USE_OS_STRING "windows"
2215#elif defined(DUK_F_TOS)
2216#define DUK_USE_OS_STRING "tos"
2217#elif defined(DUK_F_AMIGAOS)
2218#define DUK_USE_OS_STRING "amigaos"
2219#elif defined(DUK_F_QNX)
2220#define DUK_USE_OS_STRING "qnx"
2221#elif defined(DUK_F_TINSPIRE)
2222#define DUK_USE_OS_STRING "tinspire"
2223#else
2224#define DUK_USE_OS_STRING "unknown"
2225#endif
2226
2227/*
2228 * Compiler string, human readable value exposed in Duktape.env
2229 */
2230
2231#if defined(DUK_F_MINGW)
2232#define DUK_USE_COMPILER_STRING "mingw"
2233#elif defined(DUK_F_GCC)
2234#if defined(DUK_F_CPP)
2235#define DUK_USE_COMPILER_STRING "g++"
2236#else
2237#define DUK_USE_COMPILER_STRING "gcc"
2238#endif
2239#elif defined(DUK_F_CLANG)
2240#define DUK_USE_COMPILER_STRING "clang"
2241#elif defined(DUK_F_MSVC)
2242#define DUK_USE_COMPILER_STRING "msvc"
2243#elif defined(DUK_F_VBCC)
2244#define DUK_USE_COMPILER_STRING "vbcc"
2245#else
2246#define DUK_USE_COMPILER_STRING "unknown"
2247#endif
2248
2249/*
2250 * Target info string
2251 */
2252
2253#if defined(DUK_OPT_TARGET_INFO)
2254#define DUK_USE_TARGET_INFO DUK_OPT_TARGET_INFO
2255#else
2256#define DUK_USE_TARGET_INFO "unknown"
2257#endif
2258
2259/*
2260 * Long control transfer, setjmp/longjmp or alternatives
2261 *
2262 * Signal mask is not saved (when that can be communicated to the platform)
2263 */
2264
2265/* dummy non-zero value to be used as an argument for longjmp(), see man longjmp */
2266#define DUK_LONGJMP_DUMMY_VALUE 1
2267
2268#if defined(DUK_OPT_SETJMP)
2269#define DUK_USE_SETJMP
2270#elif defined(DUK_OPT_UNDERSCORE_SETJMP)
2271#define DUK_USE_UNDERSCORE_SETJMP
2272#elif defined(DUK_OPT_SIGSETJMP)
2273#define DUK_USE_SIGSETJMP
2274#elif defined(__APPLE__)
2275/* Use _setjmp() on Apple by default, see GH-55. */
2276#define DUK_USE_UNDERSCORE_SETJMP
2277#else
2278/* The most portable default is setjmp(). */
2279#define DUK_USE_SETJMP
2280#endif
2281
2282#if defined(DUK_USE_UNDERSCORE_SETJMP)
2283#define DUK_SETJMP(jb) _setjmp((jb))
2284#define DUK_LONGJMP(jb) _longjmp((jb), DUK_LONGJMP_DUMMY_VALUE)
2285#elif defined(DUK_USE_SIGSETJMP)
2286#define DUK_SETJMP(jb) sigsetjmp((jb), 0 /*savesigs*/)
2287#define DUK_LONGJMP(jb) siglongjmp((jb), DUK_LONGJMP_DUMMY_VALUE)
2288#elif defined(DUK_USE_SETJMP)
2289#define DUK_SETJMP(jb) setjmp((jb))
2290#define DUK_LONGJMP(jb) longjmp((jb), DUK_LONGJMP_DUMMY_VALUE)
2291#else
2292#error internal error
2293#endif
2294
2295/*
2296 * Speed/size and other performance options
2297 */
2298
2299/* Use fast ("inline") refcount operations instead of calling out to helpers
2300 * by default. The difference in binary size is small (~1kB on x64).
2301 */
2302#define DUK_USE_FAST_REFCOUNT_DEFAULT
2303
2304/* Assert for valstack space but don't check for it in non-assert build.
2305 * Valstack overruns (writing beyond checked space) is memory unsafe and
2306 * potentially a segfault. Produces a smaller and faster binary.
2307 * (In practice the speed difference is small with -O3 so default to
2308 * safer behavior for now.)
2309 */
2310#undef DUK_USE_VALSTACK_UNSAFE
2311
2312/* Catch-all flag which can be used to choose between variant algorithms
2313 * where a speed-size tradeoff exists (e.g. lookup tables). When it really
2314 * matters, specific use flags may be appropriate.
2315 */
2316#define DUK_USE_PREFER_SIZE
2317
2318/* Use a sliding window for lexer; slightly larger footprint, slightly faster. */
2319#define DUK_USE_LEXER_SLIDING_WINDOW
2320
2321/* Transparent JSON.stringify() fastpath. */
2322#undef DUK_USE_JSON_STRINGIFY_FASTPATH
2323#if defined(DUK_OPT_JSON_STRINGIFY_FASTPATH)
2324#define DUK_USE_JSON_STRINGIFY_FASTPATH
2325#endif
2326
2327/*
2328 * Tagged type representation (duk_tval)
2329 */
2330
2331#undef DUK_USE_PACKED_TVAL
2332#undef DUK_USE_FULL_TVAL
2333
2334#if defined(DUK_USE_PACKED_TVAL_POSSIBLE) && !defined(DUK_OPT_NO_PACKED_TVAL)
2335#define DUK_USE_PACKED_TVAL
2336#endif
2337
2338/* Support for 48-bit signed integer duk_tval with transparent semantics. */
2339#undef DUK_USE_FASTINT
2340#if defined(DUK_OPT_FASTINT)
2341#if !defined(DUK_F_HAVE_64BIT)
2342#error DUK_OPT_FASTINT requires 64-bit integer type support at the moment
2343#endif
2344#define DUK_USE_FASTINT
2345#endif
2346
2347/*
2348 * Memory management options
2349 */
2350
2351#define DUK_USE_REFERENCE_COUNTING
2352#define DUK_USE_DOUBLE_LINKED_HEAP
2353#define DUK_USE_MARK_AND_SWEEP
2354#define DUK_USE_MS_STRINGTABLE_RESIZE
2355
2356#if defined(DUK_OPT_NO_REFERENCE_COUNTING)
2357#undef DUK_USE_REFERENCE_COUNTING
2358#undef DUK_USE_DOUBLE_LINKED_HEAP
2359/* XXX: undef DUK_USE_MS_STRINGTABLE_RESIZE as it is more expensive
2360 * with more frequent mark-and-sweeps?
2361 */
2362#endif
2363
2364#if defined(DUK_OPT_NO_MARK_AND_SWEEP)
2365#undef DUK_USE_MARK_AND_SWEEP
2366#endif
2367
2368#if defined(DUK_USE_MARK_AND_SWEEP)
2369#define DUK_USE_VOLUNTARY_GC
2370#if defined(DUK_OPT_NO_VOLUNTARY_GC)
2371#undef DUK_USE_VOLUNTARY_GC
2372#endif
2373#endif
2374
2375#if !defined(DUK_USE_MARK_AND_SWEEP) && !defined(DUK_USE_REFERENCE_COUNTING)
2376#error must have either mark-and-sweep or reference counting enabled
2377#endif
2378
2379#if defined(DUK_OPT_NO_MS_STRINGTABLE_RESIZE)
2380#undef DUK_USE_MS_STRINGTABLE_RESIZE
2381#endif
2382
2383#undef DUK_USE_GC_TORTURE
2384#if defined(DUK_OPT_GC_TORTURE)
2385#define DUK_USE_GC_TORTURE
2386#endif
2387
2388/*
2389 * String table options
2390 */
2391
2392#if defined(DUK_OPT_STRTAB_CHAIN) && defined(DUK_OPT_STRTAB_CHAIN_SIZE)
2393/* Low memory algorithm: separate chaining using arrays, fixed size hash */
2394#define DUK_USE_STRTAB_CHAIN
2395#define DUK_USE_STRTAB_CHAIN_SIZE DUK_OPT_STRTAB_CHAIN_SIZE
2396#else
2397/* Default algorithm: open addressing (probing) */
2398#define DUK_USE_STRTAB_PROBE
2399#endif
2400
2401/*
2402 * Error handling options
2403 */
2404
2405#define DUK_USE_AUGMENT_ERROR_CREATE
2406#define DUK_USE_AUGMENT_ERROR_THROW
2407#define DUK_USE_TRACEBACKS
2408#define DUK_USE_ERRCREATE
2409#define DUK_USE_ERRTHROW
2410
2411#define DUK_USE_VERBOSE_ERRORS
2412
2413#if defined(DUK_OPT_NO_AUGMENT_ERRORS)
2414#undef DUK_USE_AUGMENT_ERROR_CREATE
2415#undef DUK_USE_AUGMENT_ERROR_THROW
2416#undef DUK_USE_TRACEBACKS
2417#undef DUK_USE_ERRCREATE
2418#undef DUK_USE_ERRTHROW
2419#elif defined(DUK_OPT_NO_TRACEBACKS)
2420#undef DUK_USE_TRACEBACKS
2421#endif
2422
2423#if defined(DUK_OPT_NO_VERBOSE_ERRORS)
2424#undef DUK_USE_VERBOSE_ERRORS
2425#endif
2426
2427#if defined(DUK_USE_TRACEBACKS)
2428#if defined(DUK_OPT_TRACEBACK_DEPTH)
2429#define DUK_USE_TRACEBACK_DEPTH DUK_OPT_TRACEBACK_DEPTH
2430#else
2431#define DUK_USE_TRACEBACK_DEPTH 10
2432#endif
2433#endif
2434
2435/* Include messages in executor internal errors. */
2436#define DUK_USE_VERBOSE_EXECUTOR_ERRORS
2437
2438/*
2439 * Execution and debugger options
2440 */
2441
2442#undef DUK_USE_INTERRUPT_COUNTER
2443#if defined(DUK_OPT_INTERRUPT_COUNTER)
2444#define DUK_USE_INTERRUPT_COUNTER
2445#endif
2446
2447#undef DUK_USE_EXEC_TIMEOUT_CHECK
2448#if defined(DUK_OPT_EXEC_TIMEOUT_CHECK)
2449#define DUK_USE_EXEC_TIMEOUT_CHECK(udata) DUK_OPT_EXEC_TIMEOUT_CHECK((udata))
2450#endif
2451
2452#undef DUK_USE_DEBUGGER_SUPPORT
2453#if defined(DUK_OPT_DEBUGGER_SUPPORT)
2454#define DUK_USE_DEBUGGER_SUPPORT
2455#endif
2456
2457#undef DUK_USE_DEBUGGER_FWD_PRINTALERT
2458#if defined(DUK_OPT_DEBUGGER_SUPPORT) && defined(DUK_OPT_DEBUGGER_FWD_PRINTALERT)
2459#define DUK_USE_DEBUGGER_FWD_PRINTALERT
2460#endif
2461
2462#undef DUK_USE_DEBUGGER_FWD_LOGGING
2463#if defined(DUK_OPT_DEBUGGER_SUPPORT) && defined(DUK_OPT_DEBUGGER_FWD_LOGGING)
2464#define DUK_USE_DEBUGGER_FWD_LOGGING
2465#endif
2466
2467/* DumpHeap is optional because it's not always needed and has a relatively
2468 * large footprint.
2469 */
2470#undef DUK_USE_DEBUGGER_DUMPHEAP
2471#if defined(DUK_OPT_DEBUGGER_DUMPHEAP)
2472#define DUK_USE_DEBUGGER_DUMPHEAP
2473#endif
2474
2475/* Debugger transport read/write torture. */
2476#undef DUK_USE_DEBUGGER_TRANSPORT_TORTURE
2477#if defined(DUK_OPT_DEBUGGER_TRANSPORT_TORTURE)
2478#define DUK_USE_DEBUGGER_TRANSPORT_TORTURE
2479#endif
2480
2481/* For opcodes with indirect indices, check final index against stack size.
2482 * This should not be necessary because the compiler is trusted, and we don't
2483 * bound check non-indirect indices either.
2484 */
2485#undef DUK_USE_EXEC_INDIRECT_BOUND_CHECK
2486#if defined(DUK_OPT_DEBUG) || defined(DUK_OPT_ASSERTIONS)
2487/* Enabled with debug/assertions just so that any issues can be caught. */
2488#define DUK_USE_EXEC_INDIRECT_BOUND_CHECK
2489#endif
2490
2491/*
2492 * Debug printing and assertion options
2493 */
2494
2495#undef DUK_USE_DEBUG
2496#undef DUK_USE_DPRINT
2497#undef DUK_USE_DDPRINT
2498#undef DUK_USE_DDDPRINT
2499#undef DUK_USE_DPRINT_RDTSC
2500#undef DUK_USE_ASSERTIONS
2501
2502/* Global debug enable. Compile must be clean on C99 regardless of whether or
2503 * not debugging is enabled. On non-C99 platforms compile should be clean with
2504 * debugging disabled but may produce warnings with debugging enabled (related
2505 * to debug macro hackery and such).
2506 */
2507#if defined(DUK_OPT_DEBUG)
2508#define DUK_USE_DEBUG
2509#endif
2510
2511#if defined(DUK_OPT_DEBUG) && defined(DUK_OPT_DPRINT)
2512#define DUK_USE_DPRINT
2513#endif
2514#if defined(DUK_OPT_DEBUG) && defined(DUK_OPT_DDPRINT)
2515#define DUK_USE_DDPRINT
2516#endif
2517#if defined(DUK_OPT_DEBUG) && defined(DUK_OPT_DDDPRINT)
2518#define DUK_USE_DDDPRINT
2519#endif
2520
2521#undef DUK_USE_DPRINT_COLORS
2522#if defined(DUK_OPT_DPRINT_COLORS)
2523#define DUK_USE_DPRINT_COLORS
2524#endif
2525
2526#if defined(DUK_USE_RDTSC) && defined(DUK_OPT_DPRINT_RDTSC)
2527#define DUK_USE_DPRINT_RDTSC
2528#else
2529#undef DUK_USE_DPRINT_RDTSC
2530#endif
2531
2532#if defined(DUK_OPT_ASSERTIONS)
2533#define DUK_USE_ASSERTIONS
2534#endif
2535
2536/* The static buffer for debug printing is quite large by default, so there
2537 * is an option to shrink it manually for constrained builds.
2538 */
2539#if defined(DUK_OPT_DEBUG_BUFSIZE)
2540#define DUK_USE_DEBUG_BUFSIZE DUK_OPT_DEBUG_BUFSIZE
2541#else
2542#define DUK_USE_DEBUG_BUFSIZE 65536L
2543#endif
2544
2545/*
2546 * Ecmascript features / compliance options
2547 */
2548
2549#if defined(DUK_F_BCC)
2550/* Math built-in is stubbed out on BCC to allow compiler torture testing. */
2551#else
2552#define DUK_USE_MATH_BUILTIN
2553#endif
2554
2555#define DUK_USE_STRICT_DECL
2556#if defined(DUK_OPT_NO_STRICT_DECL)
2557#undef DUK_USE_STRICT_DECL
2558#endif
2559
2560#define DUK_USE_REGEXP_SUPPORT
2561#if defined(DUK_OPT_NO_REGEXP_SUPPORT)
2562#undef DUK_USE_REGEXP_SUPPORT
2563#endif
2564
2565#undef DUK_USE_STRICT_UTF8_SOURCE
2566#if defined(DUK_OPT_STRICT_UTF8_SOURCE)
2567#define DUK_USE_STRICT_UTF8_SOURCE
2568#endif
2569
2570#define DUK_USE_OCTAL_SUPPORT
2571#if defined(DUK_OPT_NO_OCTAL_SUPPORT)
2572#undef DUK_USE_OCTAL_SUPPORT
2573#endif
2574
2575#define DUK_USE_SOURCE_NONBMP
2576#if defined(DUK_OPT_NO_SOURCE_NONBMP)
2577#undef DUK_USE_SOURCE_NONBMP
2578#endif
2579
2580#define DUK_USE_BROWSER_LIKE
2581#if defined(DUK_OPT_NO_BROWSER_LIKE)
2582#undef DUK_USE_BROWSER_LIKE
2583#endif
2584
2585/* E5/E5.1 Section B features. */
2586#define DUK_USE_SECTION_B
2587#if defined(DUK_OPT_NO_SECTION_B)
2588#undef DUK_USE_SECTION_B
2589#endif
2590
2591/* Non-standard regexp parsing features. */
2592#define DUK_USE_NONSTD_REGEXP_DOLLAR_ESCAPE
2593
2594/* Treat function statements (function declarations outside top level of
2595 * Program or FunctionBody) same as normal function declarations. This is
2596 * also V8 behavior. See test-dev-func-decl-outside-top.js.
2597 */
2598#define DUK_USE_NONSTD_FUNC_STMT
2599#if defined(DUK_OPT_NO_NONSTD_FUNC_STMT)
2600#undef DUK_USE_NONSTD_FUNC_STMT
2601#endif
2602
2603/* Array.prototype.splice() non-standard but real world compatible behavior
2604 * when deleteCount is omitted.
2605 */
2606#define DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT
2607#if defined(DUK_OPT_NO_NONSTD_ARRAY_SPLICE_DELCOUNT)
2608#undef DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT
2609#endif
2610
2611/* Array.prototype.concat() non-standard but real world compatible behavior
2612 * for non-existent trailing elements.
2613 */
2614#define DUK_USE_NONSTD_ARRAY_CONCAT_TRAILER
2615#if defined(DUK_OPT_NO_NONSTD_ARRAY_CONCAT_TRAILER)
2616#undef DUK_USE_NONSTD_ARRAY_CONCAT_TRAILER
2617#endif
2618
2619/* Array.prototype.map() non-standard but real world compatible behavior
2620 * for non-existent trailing elements.
2621 */
2622#define DUK_USE_NONSTD_ARRAY_MAP_TRAILER
2623#if defined(DUK_OPT_NO_NONSTD_ARRAY_MAP_TRAILER)
2624#undef DUK_USE_NONSTD_ARRAY_MAP_TRAILER
2625#endif
2626
2627/* Non-standard 'caller' property for function instances, see
2628 * test-bi-function-nonstd-caller-prop.js.
2629 */
2630#undef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
2631#if defined(DUK_OPT_NONSTD_FUNC_CALLER_PROPERTY)
2632#define DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
2633#endif
2634
2635/* Non-standard Object.prototype.__proto__ (ES6), see
2636 * test-bi-object-proto-__proto__.js.
2637 */
2638#define DUK_USE_ES6_OBJECT_PROTO_PROPERTY
2639#if defined(DUK_OPT_NO_ES6_OBJECT_PROTO_PROPERTY)
2640#undef DUK_USE_ES6_OBJECT_PROTO_PROPERTY
2641#endif
2642
2643/* Non-standard Object.setPrototypeOf (ES6), see
2644 * test-bi-object-setprototypeof.js.
2645 */
2646#define DUK_USE_ES6_OBJECT_SETPROTOTYPEOF
2647#if defined(DUK_OPT_NO_ES6_OBJECT_SETPROTOTYPEOF)
2648#undef DUK_USE_ES6_OBJECT_SETPROTOTYPEOF
2649#endif
2650
2651/* ES6 Proxy object (subset for now). */
2652#define DUK_USE_ES6_PROXY
2653#if defined(DUK_OPT_NO_ES6_PROXY)
2654#undef DUK_USE_ES6_PROXY
2655#endif
2656
2657/* Record pc-to-line information. */
2658#define DUK_USE_PC2LINE
2659#if defined(DUK_OPT_NO_PC2LINE)
2660#undef DUK_USE_PC2LINE
2661#endif
2662
2663/* Non-standard function 'source' property. */
2664#undef DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY
2665#if defined(DUK_OPT_NONSTD_FUNC_SOURCE_PROPERTY)
2666#define DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY
2667#endif
2668
2669/* CommonJS modules */
2670#define DUK_USE_COMMONJS_MODULES
2671#if defined(DUK_OPT_NO_COMMONJS_MODULES)
2672#undef DUK_USE_COMMONJS_MODULES
2673#endif
2674
2675/* Additional key argument to setter/getter calls when triggered by property
2676 * accesses.
2677 */
2678
2679#define DUK_USE_NONSTD_GETTER_KEY_ARGUMENT
2680#define DUK_USE_NONSTD_SETTER_KEY_ARGUMENT
2681#if defined(DUK_OPT_NO_NONSTD_ACCESSOR_KEY_ARGUMENT)
2682#undef DUK_USE_NONSTD_GETTER_KEY_ARGUMENT
2683#undef DUK_USE_NONSTD_SETTER_KEY_ARGUMENT
2684#endif
2685
2686/* JSON escaping of U+2028 and U+2029.
2687 */
2688
2689#define DUK_USE_NONSTD_JSON_ESC_U2028_U2029
2690#if defined(DUK_OPT_NO_NONSTD_JSON_ESC_U2028_U2029)
2691#undef DUK_USE_NONSTD_JSON_ESC_U2028_U2029
2692#endif
2693
2694/* Allow 32-bit codepoints in String.fromCharCode. */
2695#define DUK_USE_NONSTD_STRING_FROMCHARCODE_32BIT
2696#if defined(DUK_OPT_NO_NONSTD_STRING_FROMCHARCODE_32BIT)
2697#undef DUK_USE_NONSTD_STRING_FROMCHARCODE_32BIT
2698#endif
2699
2700/* Non-standard array fast path write behavior: when writing to numeric
2701 * indexes of an Array instance, assume Array.prototype doesn't have
2702 * conflicting properties (e.g. a non-writable property "7").
2703 */
2704#define DUK_USE_NONSTD_ARRAY_WRITE
2705#if defined(DUK_OPT_NO_NONSTD_ARRAY_WRITE)
2706#undef DUK_USE_NONSTD_ARRAY_WRITE
2707#endif
2708
2709/* Node.js Buffer and Khronos/ES6 typed array support. */
2710#define DUK_USE_BUFFEROBJECT_SUPPORT
2711#if defined(DUK_OPT_NO_BUFFEROBJECT_SUPPORT)
2712#undef DUK_USE_BUFFEROBJECT_SUPPORT
2713#endif
2714
2715/*
2716 * Optional C API options
2717 */
2718
2719#define DUK_USE_BYTECODE_DUMP_SUPPORT
2720#if defined(DUK_OPT_NO_BYTECODE_DUMP_SUPPORT)
2721#undef DUK_USE_BYTECODE_DUMP_SUPPORT
2722#endif
2723
2724/*
2725 * Tailcalls
2726 */
2727
2728/* Tailcalls are enabled by default. The non-standard function 'caller'
2729 * property feature conflicts with tailcalls quite severely so tailcalls
2730 * are disabled if the 'caller' property is enabled.
2731 */
2732#define DUK_USE_TAILCALL
2733#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
2734#undef DUK_USE_TAILCALL
2735#endif
2736
2737/*
2738 * Ecmascript compiler
2739 */
2740
2741/* Ensure final bytecode never exceeds a certain byte size and never uses
2742 * line numbers above a certain limit. This ensures that there is no need
2743 * to deal with unbounded ranges in e.g. pc2line data structures. For now,
2744 * limits are set so that signed 32-bit values can represent line number
2745 * and byte offset with room to spare.
2746 */
2747#define DUK_USE_ESBC_LIMITS
2748#define DUK_USE_ESBC_MAX_LINENUMBER 0x7fff0000L
2749#define DUK_USE_ESBC_MAX_BYTES 0x7fff0000L
2750
2751#undef DUK_USE_SHUFFLE_TORTURE
2752#if defined(DUK_OPT_SHUFFLE_TORTURE)
2753#define DUK_USE_SHUFFLE_TORTURE
2754#endif
2755
2756/*
2757 * User panic handler, panic exit behavior for default panic handler
2758 */
2759
2760#undef DUK_USE_PANIC_HANDLER
2761#if defined(DUK_OPT_PANIC_HANDLER)
2762#define DUK_USE_PANIC_HANDLER(code,msg) DUK_OPT_PANIC_HANDLER((code),(msg))
2763#endif
2764
2765#undef DUK_USE_PANIC_ABORT
2766#undef DUK_USE_PANIC_EXIT
2767#undef DUK_USE_PANIC_SEGFAULT
2768
2769#if defined(DUK_OPT_SEGFAULT_ON_PANIC)
2770#define DUK_USE_PANIC_SEGFAULT
2771#else
2772#define DUK_USE_PANIC_ABORT
2773#endif
2774
2775/*
2776 * File I/O support. This is now used in a few API calls to e.g. push
2777 * a string from file contents or eval a file. For portability it must
2778 * be possible to disable I/O altogether.
2779 */
2780
2781#undef DUK_USE_FILE_IO
2782#if !defined(DUK_OPT_NO_FILE_IO)
2783#define DUK_USE_FILE_IO
2784#endif
2785
2786/*
2787 * Optional run-time self tests executed when a heap is created. Some
2788 * platform/compiler issues cannot be determined at compile time. One
2789 * particular example is the bug described in misc/clang_aliasing.c.
2790 */
2791
2792#undef DUK_USE_SELF_TESTS
2793#if defined(DUK_OPT_SELF_TESTS)
2794#define DUK_USE_SELF_TESTS
2795#endif
2796
2797/* Double aliasing testcase fails when Emscripten-generated code is run
2798 * on Firefox. This is not fatal because it only affects packed duk_tval
2799 * which we avoid with Emscripten.
2800 */
2801#undef DUK_USE_NO_DOUBLE_ALIASING_SELFTEST
2802#if defined(DUK_F_EMSCRIPTEN)
2803#define DUK_USE_NO_DOUBLE_ALIASING_SELFTEST
2804#endif
2805
2806/*
2807 * Codecs
2808 */
2809
2810#define DUK_USE_JX
2811#if defined(DUK_OPT_NO_JX)
2812#undef DUK_USE_JX
2813#endif
2814
2815#define DUK_USE_JC
2816#if defined(DUK_OPT_NO_JC)
2817#undef DUK_USE_JC
2818#endif
2819
2820/*
2821 * InitJS code
2822 */
2823
2824/* Always use the built-in InitJS code for now. */
2825#define DUK_USE_BUILTIN_INITJS
2826
2827/* User provided InitJS. */
2828#undef DUK_USE_USER_INITJS
2829#if defined(DUK_OPT_USER_INITJS)
2830#define DUK_USE_USER_INITJS (DUK_OPT_USER_INITJS)
2831#endif
2832
2833/*
2834 * External string data support
2835 *
2836 * Allow duk_hstrings to store data also behind an external pointer (see
2837 * duk_hstring_external). This increases code size slightly but is useful
2838 * in low memory environments where memory is more limited than flash.
2839 */
2840
2841#undef DUK_USE_HSTRING_EXTDATA
2842#if defined(DUK_OPT_EXTERNAL_STRINGS)
2843#define DUK_USE_HSTRING_EXTDATA
2844#endif
2845
2846#undef DUK_USE_EXTSTR_INTERN_CHECK
2847#if defined(DUK_OPT_EXTERNAL_STRINGS) && defined(DUK_OPT_EXTSTR_INTERN_CHECK)
2848#define DUK_USE_EXTSTR_INTERN_CHECK(udata,ptr,len) DUK_OPT_EXTSTR_INTERN_CHECK((udata), (ptr), (len))
2849#endif
2850
2851#undef DUK_USE_EXTSTR_FREE
2852#if defined(DUK_OPT_EXTERNAL_STRINGS) && defined(DUK_OPT_EXTSTR_FREE)
2853#define DUK_USE_EXTSTR_FREE(udata,ptr) DUK_OPT_EXTSTR_FREE((udata), (ptr))
2854#endif
2855
2856/*
2857 * Lightweight functions
2858 */
2859
2860/* Force built-ins to use lightfunc function pointers when possible. This
2861 * makes the built-in functions non-compliant with respect to their property
2862 * values and such, but is very useful in low memory environments (can save
2863 * around 14kB of initial RAM footprint).
2864 */
2865#undef DUK_USE_LIGHTFUNC_BUILTINS
2866#if defined(DUK_OPT_LIGHTFUNC_BUILTINS)
2867#define DUK_USE_LIGHTFUNC_BUILTINS
2868#endif
2869
2870/*
2871 * Pointer compression and 16-bit header fields for low memory environments
2872 */
2873
2874#undef DUK_USE_HEAPPTR16
2875#undef DUK_USE_HEAPPTR_ENC16
2876#undef DUK_USE_HEAPPTR_DEC16
2877#if defined(DUK_OPT_HEAPPTR16) && defined(DUK_OPT_HEAPPTR_ENC16) && defined(DUK_OPT_HEAPPTR_DEC16)
2878#define DUK_USE_HEAPPTR16
2879#define DUK_USE_HEAPPTR_ENC16(udata,ptr) DUK_OPT_HEAPPTR_ENC16((udata),(ptr))
2880#define DUK_USE_HEAPPTR_DEC16(udata,ptr) DUK_OPT_HEAPPTR_DEC16((udata),(ptr))
2881#endif
2882
2883#undef DUK_USE_DATAPTR16
2884#undef DUK_USE_DATAPTR_ENC16
2885#undef DUK_USE_DATAPTR_DEC16
2886#if defined(DUK_OPT_DATAPTR16) && defined(DUK_OPT_DATAPTR_ENC16) && defined(DUK_OPT_DATAPTR_DEC16)
2887#define DUK_USE_DATAPTR16
2888#define DUK_USE_DATAPTR_ENC16(udata,ptr) DUK_OPT_DATAPTR_ENC16((udata),(ptr))
2889#define DUK_USE_DATAPTR_DEC16(udata,ptr) DUK_OPT_DATAPTR_DEC16((udata),(ptr))
2890#endif
2891
2892#undef DUK_USE_FUNCPTR16
2893#undef DUK_USE_FUNCPTR_ENC16
2894#undef DUK_USE_FUNCPTR_DEC16
2895#if defined(DUK_OPT_FUNCPTR16) && defined(DUK_OPT_FUNCPTR_ENC16) && defined(DUK_OPT_FUNCPTR_DEC16)
2896#define DUK_USE_FUNCPTR16
2897#define DUK_USE_FUNCPTR_ENC16(udata,ptr) DUK_OPT_FUNCPTR_ENC16((udata),(ptr))
2898#define DUK_USE_FUNCPTR_DEC16(udata,ptr) DUK_OPT_FUNCPTR_DEC16((udata),(ptr))
2899#endif
2900
2901#undef DUK_USE_REFCOUNT16
2902#if defined(DUK_OPT_REFCOUNT16)
2903#define DUK_USE_REFCOUNT16
2904#endif
2905
2906#undef DUK_USE_STRHASH16
2907#if defined(DUK_OPT_STRHASH16)
2908#define DUK_USE_STRHASH16
2909#endif
2910
2911#undef DUK_USE_STRLEN16
2912#if defined(DUK_OPT_STRLEN16)
2913#define DUK_USE_STRLEN16
2914#endif
2915
2916#undef DUK_USE_BUFLEN16
2917#if defined(DUK_OPT_BUFLEN16)
2918#define DUK_USE_BUFLEN16
2919#endif
2920
2921#undef DUK_USE_OBJSIZES16
2922#if defined(DUK_OPT_OBJSIZES16)
2923#define DUK_USE_OBJSIZES16
2924#endif
2925
2926/* For now, hash part is dropped if and only if 16-bit object fields are used. */
2927#define DUK_USE_HOBJECT_HASH_PART
2928#if defined(DUK_USE_OBJSIZES16)
2929#undef DUK_USE_HOBJECT_HASH_PART
2930#endif
2931
2932/*
2933 * Miscellaneous
2934 */
2935
2936/* Convenience define: 32-bit pointers. 32-bit platforms are an important
2937 * footprint optimization target, and this define allows e.g. struct sizes
2938 * to be organized for compactness.
2939 */
2940#undef DUK_USE_32BIT_PTRS
2941#if defined(DUK_UINTPTR_MAX) && !defined(DUK_UINTPTR_MAX_COMPUTED)
2942#if DUK_UINTPTR_MAX <= 0xffffffffUL
2943#define DUK_USE_32BIT_PTRS
2944#endif
2945#endif
2946
2947#define DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS
2948#undef DUK_USE_EXPLICIT_NULL_INIT
2949
2950#define DUK_USE_ZERO_BUFFER_DATA
2951#if defined(DUK_OPT_NO_ZERO_BUFFER_DATA)
2952#undef DUK_USE_ZERO_BUFFER_DATA
2953#endif
2954
2955#undef DUK_USE_VARIADIC_MACROS
2956#if defined(DUK_F_C99) || (defined(DUK_F_CPP11) && defined(__GNUC__))
2957#define DUK_USE_VARIADIC_MACROS
2958#endif
2959#if defined(_MSC_VER) && !defined(DUK_USE_VARIADIC_MACROS)
2960#if (_MSC_VER >= 1400)
2961/* VS2005+ should have variadic macros even when they're not C99. */
2962#define DUK_USE_VARIADIC_MACROS
2963#endif
2964#endif
2965
2966/*
2967 * Variable size array initialization.
2968 *
2969 * Variable size array at the end of a structure is nonportable.
2970 * There are three alternatives:
2971 *
2972 * 1) C99 (flexible array member): char buf[]
2973 * 2) Compiler specific (e.g. GCC): char buf[0]
2974 * 3) Portable but wastes memory / complicates allocation: char buf[1]
2975 */
2976
2977/* XXX: Currently unused, only hbuffer.h needed this at some point. */
2978#undef DUK_USE_FLEX_C99
2979#undef DUK_USE_FLEX_ZEROSIZE
2980#undef DUK_USE_FLEX_ONESIZE
2981#if defined(DUK_F_C99)
2982#define DUK_USE_FLEX_C99
2983#elif defined(__GNUC__)
2984#define DUK_USE_FLEX_ZEROSIZE
2985#else
2986#define DUK_USE_FLEX_ONESIZE
2987#endif
2988
2989/*
2990 * GCC pragmas
2991 */
2992
2993/* XXX: GCC pragma inside a function fails in some earlier GCC versions (e.g. gcc 4.5).
2994 * This is very approximate but allows clean builds for development right now.
2995 */
2996/* http://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html */
2997#if defined(__GNUC__) && defined(__GNUC_MINOR__) && (__GNUC__ == 4) && (__GNUC_MINOR__ >= 6)
2998#define DUK_USE_GCC_PRAGMAS
2999#else
3000#undef DUK_USE_GCC_PRAGMAS
3001#endif
3002
3003/*
3004 * User declarations
3005 */
3006
3007#if defined(DUK_OPT_DECLARE)
3008#define DUK_USE_USER_DECLARE() DUK_OPT_DECLARE
3009#else
3010#define DUK_USE_USER_DECLARE() /* no user declarations */
3011#endif
3012
3013/*
3014 * Autogenerated defaults
3015 */
3016
3017#define DUK_USE_COMPILER_RECLIMIT 2500
3018#undef DUK_USE_DATE_FORMAT_STRING
3019#undef DUK_USE_DATE_GET_LOCAL_TZOFFSET
3020#undef DUK_USE_DATE_GET_NOW
3021#undef DUK_USE_DATE_PARSE_STRING
3022#undef DUK_USE_DATE_PRS_GETDATE
3023#undef DUK_USE_INTEGER_ME
3024#define DUK_USE_JSON_DECNUMBER_FASTPATH
3025#define DUK_USE_JSON_DECSTRING_FASTPATH
3026#define DUK_USE_JSON_DEC_RECLIMIT 1000
3027#define DUK_USE_JSON_EATWHITE_FASTPATH
3028#define DUK_USE_JSON_ENC_RECLIMIT 1000
3029#define DUK_USE_JSON_QUOTESTRING_FASTPATH
3030#undef DUK_USE_MARKANDSWEEP_FINALIZER_TORTURE
3031#define DUK_USE_MARK_AND_SWEEP_RECLIMIT 256
3032#define DUK_USE_NATIVE_CALL_RECLIMIT 1000
3033#undef DUK_USE_REFZERO_FINALIZER_TORTURE
3034#define DUK_USE_REGEXP_COMPILER_RECLIMIT 10000
3035#define DUK_USE_REGEXP_EXECUTOR_RECLIMIT 10000
3036
3037/*
3038 * Alternative customization header
3039 *
3040 * If you want to modify the final DUK_USE_xxx flags directly (without
3041 * using the available DUK_OPT_xxx flags), define DUK_OPT_HAVE_CUSTOM_H
3042 * and tweak the final flags there.
3043 */
3044
3045#if defined(DUK_OPT_HAVE_CUSTOM_H)
3046#include "duk_custom.h"
3047#endif
3048
3049/*
3050 * You may add overriding #define/#undef directives below for
3051 * customization. You of course cannot un-#include or un-typedef
3052 * anything; these require direct changes above.
3053 */
3054
3055/* __OVERRIDE_DEFINES__ */
3056
3057/*
3058 * Date provider selection
3059 *
3060 * User may define DUK_USE_DATE_GET_NOW() etc directly, in which case we'll
3061 * rely on an external provider. If this is not done, revert to previous
3062 * behavior and use Unix/Windows built-in provider.
3063 */
3064
3065#if defined(DUK_COMPILING_DUKTAPE)
3066
3067#if defined(DUK_USE_DATE_GET_NOW)
3068/* External provider already defined. */
3069#elif defined(DUK_USE_DATE_NOW_GETTIMEOFDAY)
3070DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_gettimeofday(duk_context *ctx);
3071#define DUK_USE_DATE_GET_NOW(ctx) duk_bi_date_get_now_gettimeofday((ctx))
3072#elif defined(DUK_USE_DATE_NOW_TIME)
3073DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_time(duk_context *ctx);
3074#define DUK_USE_DATE_GET_NOW(ctx) duk_bi_date_get_now_time((ctx))
3075#elif defined(DUK_USE_DATE_NOW_WINDOWS)
3076DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_windows(duk_context *ctx);
3077#define DUK_USE_DATE_GET_NOW(ctx) duk_bi_date_get_now_windows((ctx))
3078#else
3079#error no provider for DUK_USE_DATE_GET_NOW()
3080#endif
3081
3082#if defined(DUK_USE_DATE_GET_LOCAL_TZOFFSET)
3083/* External provider already defined. */
3084#elif defined(DUK_USE_DATE_TZO_GMTIME_R) || defined(DUK_USE_DATE_TZO_GMTIME)
3085DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_gmtime(duk_double_t d);
3086#define DUK_USE_DATE_GET_LOCAL_TZOFFSET(d) duk_bi_date_get_local_tzoffset_gmtime((d))
3087#elif defined(DUK_USE_DATE_TZO_WINDOWS)
3088DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_windows(duk_double_t d);
3089#define DUK_USE_DATE_GET_LOCAL_TZOFFSET(d) duk_bi_date_get_local_tzoffset_windows((d))
3090#else
3091#error no provider for DUK_USE_DATE_GET_LOCAL_TZOFFSET()
3092#endif
3093
3094#if defined(DUK_USE_DATE_PARSE_STRING)
3095/* External provider already defined. */
3096#elif defined(DUK_USE_DATE_PRS_STRPTIME)
3097DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_strptime(duk_context *ctx, const char *str);
3098#define DUK_USE_DATE_PARSE_STRING(ctx,str) duk_bi_date_parse_string_strptime((ctx), (str))
3099#elif defined(DUK_USE_DATE_PRS_GETDATE)
3100DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_getdate(duk_context *ctx, const char *str);
3101#define DUK_USE_DATE_PARSE_STRING(ctx,str) duk_bi_date_parse_string_getdate((ctx), (str))
3102#else
3103/* No provider for DUK_USE_DATE_PARSE_STRING(), fall back to ISO 8601 only. */
3104#endif
3105
3106#if defined(DUK_USE_DATE_FORMAT_STRING)
3107/* External provider already defined. */
3108#elif defined(DUK_USE_DATE_FMT_STRFTIME)
3109DUK_INTERNAL_DECL duk_bool_t duk_bi_date_format_parts_strftime(duk_context *ctx, duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags);
3110#define DUK_USE_DATE_FORMAT_STRING(ctx,parts,tzoffset,flags) \
3111 duk_bi_date_format_parts_strftime((ctx), (parts), (tzoffset), (flags))
3112#else
3113/* No provider for DUK_USE_DATE_FORMAT_STRING(), fall back to ISO 8601 only. */
3114#endif
3115
3116#endif /* DUK_COMPILING_DUKTAPE */
3117
3118/*
3119 * Sanity check for the final effective internal defines. Also
3120 * double checks user tweaks made by an optional duk_custom.h header.
3121 */
3122
3123/*
3124 * Deprecated feature options.
3125 *
3126 * Catch so that user more easily notices and updates build.
3127 */
3128
3129#if defined(DUK_OPT_NO_FUNC_STMT)
3130#error DUK_OPT_NO_FUNC_STMT is deprecated, use DUK_OPT_NO_NONSTD_FUNC_STMT
3131#endif
3132
3133#if defined(DUK_OPT_FUNC_NONSTD_CALLER_PROPERTY)
3134#error DUK_OPT_FUNC_NONSTD_CALLER_PROPERTY is deprecated, use DUK_OPT_NONSTD_FUNC_CALLER_PROPERTY
3135#endif
3136
3137#if defined(DUK_OPT_FUNC_NONSTD_SOURCE_PROPERTY)
3138#error DUK_OPT_FUNC_NONSTD_SOURCE_PROPERTY is deprecated, use DUK_OPT_NONSTD_FUNC_SOURCE_PROPERTY
3139#endif
3140
3141#if defined(DUK_OPT_NO_ARRAY_SPLICE_NONSTD_DELCOUNT)
3142#error DUK_OPT_NO_ARRAY_SPLICE_NONSTD_DELCOUNT is deprecated, use DUK_OPT_NO_NONSTD_ARRAY_SPLICE_DELCOUNT
3143#endif
3144
3145#if defined(DUK_OPT_NO_OBJECT_ES6_PROTO_PROPERTY)
3146#error DUK_OPT_NO_OBJECT_ES6_PROTO_PROPERTY is deprecated, use DUK_OPT_NO_ES6_OBJECT_PROTO_PROPERTY
3147#endif
3148
3149#if defined(DUK_OPT_NO_OBJECT_ES6_SETPROTOTYPEOF)
3150#error DUK_OPT_NO_OBJECT_ES6_SETPROTOTYPEOF is deprecated, use DUK_OPT_NO_ES6_OBJECT_SETPROTOTYPEOF
3151#endif
3152
3153#if defined(DUK_OPT_NO_JSONX)
3154#error DUK_OPT_NO_JSONX is deprecated, use DUK_OPT_NO_JX
3155#endif
3156
3157#if defined(DUK_OPT_NO_JSONC)
3158#error DUK_OPT_NO_JSONC is deprecated, use DUK_OPT_NO_JC
3159#endif
3160
3161/*
3162 * Debug print consistency
3163 */
3164
3165#if defined(DUK_USE_DPRINT) && !defined(DUK_USE_DEBUG)
3166#error DUK_USE_DPRINT without DUK_USE_DEBUG
3167#endif
3168
3169#if defined(DUK_USE_DDPRINT) && !defined(DUK_USE_DEBUG)
3170#error DUK_USE_DDPRINT without DUK_USE_DEBUG
3171#endif
3172
3173#if defined(DUK_USE_DDDPRINT) && !defined(DUK_USE_DEBUG)
3174#error DUK_USE_DDDPRINT without DUK_USE_DEBUG
3175#endif
3176
3177#if defined(DUK_USE_HEAPPTR16) && defined(DUK_USE_DEBUG)
3178/* Debug code doesn't have access to 'heap' so it cannot decode pointers. */
3179#error debug printing cannot currently be used with heap pointer compression
3180#endif
3181
3182/*
3183 * Debugger consistency
3184 */
3185
3186#if defined(DUK_USE_DEBUGGER_SUPPORT)
3187#if !defined(DUK_USE_INTERRUPT_COUNTER)
3188#error DUK_USE_INTERRUPT_COUNTER is needed when debugger support is enabled
3189#endif
3190#if !defined(DUK_USE_PC2LINE)
3191#error DUK_USE_PC2LINE is needed when debugger support is enabled
3192#endif
3193#endif
3194
3195/*
3196 * Garbage collection consistency
3197 */
3198
3199#if defined(DUK_USE_REFERENCE_COUNTING) && !defined(DUK_USE_DOUBLE_LINKED_HEAP)
3200#error DUK_USE_REFERENCE_COUNTING defined without DUK_USE_DOUBLE_LINKED_HEAP
3201#endif
3202
3203#if defined(DUK_USE_GC_TORTURE) && !defined(DUK_USE_MARK_AND_SWEEP)
3204#error DUK_USE_GC_TORTURE defined without DUK_USE_MARK_AND_SWEEP
3205#endif
3206
3207/*
3208 * Low memory feature consistency
3209 */
3210
3211#if defined(DUK_USE_OBJSIZES16)
3212#if defined(DUK_USE_HOBJECT_HASH_PART)
3213#error DUK_USE_OBJSIZES16 assumes DUK_USE_HOBJECT_HASH_PART is not defined
3214#endif
3215#endif
3216
3217#if defined(DUK_USE_STRTAB_CHAIN) && defined(DUK_USE_STRTAB_PROBE)
3218#error both DUK_USE_STRTAB_CHAIN and DUK_USE_STRTAB_PROBE defined
3219#endif
3220#if !defined(DUK_USE_STRTAB_CHAIN) && !defined(DUK_USE_STRTAB_PROBE)
3221#error neither DUK_USE_STRTAB_CHAIN nor DUK_USE_STRTAB_PROBE is defined
3222#endif
3223
3224#endif /* DUK_CONFIG_H_INCLUDED */
Ceph