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duktape.h
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/*
* Duktape public API for Duktape 1.1.2.
* See the API reference for documentation on call semantics.
* The exposed API is inside the DUK_API_PUBLIC_H_INCLUDED
* include guard. Other parts of the header are Duktape
* internal and related to platform/compiler/feature detection.
*
* Git commit eb523a027d3d9658a0c0e2150b29e6d87f81860c (v1.1.2).
*
* See Duktape AUTHORS.rst and LICENSE.txt for copyright and
* licensing information.
*/
/* LICENSE.txt */
/*
* ===============
* Duktape license
* ===============
*
* (http://opensource.org/licenses/MIT)
*
* Copyright (c) 2013-2015 by Duktape authors (see AUTHORS.rst)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
/* AUTHORS.rst */
/*
* ===============
* Duktape authors
* ===============
*
* Copyright
* =========
*
* Duktape copyrights are held by its authors. Each author has a copyright
* to their contribution, and agrees to irrevocably license the contribution
* under the Duktape ``LICENSE.txt``.
*
* Authors
* =======
*
* Please include an e-mail address, a link to your GitHub profile, or something
* similar to allow your contribution to be identified accurately.
*
* The following people have contributed code and agreed to irrevocably license
* their contributions under the Duktape ``LICENSE.txt`` (in order of appearance):
*
* * Sami Vaarala <[email protected]>
* * Niki Dobrev
* * Andreas \u00d6man <[email protected]>
* * L\u00e1szl\u00f3 Lang\u00f3 <[email protected]>
*
* Other contributions
* ===================
*
* The following people have contributed something other than code (e.g. reported
* bugs, provided ideas, etc; roughly in order of appearance):
*
* * Greg Burns
* * Anthony Rabine
* * Carlos Costa
* * Aur\u00e9lien Bouilland
* * Preet Desai (Pris Matic)
* * judofyr (http://www.reddit.com/user/judofyr)
* * Jason Woofenden
* * Micha\u0142 Przyby\u015b
* * Anthony Howe
* * Conrad Pankoff
* * Jim Schimpf
* * Rajaran Gaunker (https://github.com/zimbabao)
* * Andreas \u00d6man
* * Doug Sanden
* * Josh Engebretson (https://github.com/JoshEngebretson)
* * Remo Eichenberger (https://github.com/remoe)
* * Mamod Mehyar (https://github.com/mamod)
* * David Demelier (https://github.com/hftmarkand)
* * Tim Caswell (https://github.com/creationix)
* * Mitchell Blank Jr (https://github.com/mitchblank)
*
* If you are accidentally missing from this list, send me an e-mail
* (``[email protected]``) and I'll fix the omission.
*/
#ifndef DUKTAPE_H_INCLUDED
#define DUKTAPE_H_INCLUDED
#define DUK_SINGLE_FILE
/*
* Determine platform features, select feature selection defines
* (e.g. _XOPEN_SOURCE), include system headers, and define DUK_USE_XXX
* defines which are (only) checked in Duktape internal code for
* activated features. Duktape feature selection is based on automatic
* feature detection, user supplied DUK_OPT_xxx defines, and optionally
* a "duk_custom.h" user header (if DUK_OPT_HAVE_CUSTOM_H is defined).
*
* When compiling Duktape, DUK_COMPILING_DUKTAPE is set, and this file
* is included before any system headers are included. Feature selection
* defines (e.g. _XOPEN_SOURCE) are defined here before any system headers
* are included (which is a requirement for system headers to work correctly).
* This file is responsible for including all system headers and contains
* all platform dependent cruft in general. When compiling user code,
* DUK_COMPILING_DUKTAPE is not defined, and we must avoid e.g. defining
* unnecessary feature selection defines.
*
* The general order of handling:
* - Compiler feature detection (require no includes)
* - Intermediate platform detection (-> easier platform defines)
* - Platform detection, system includes, byte order detection, etc
* - ANSI C wrappers (e.g. DUK_MEMCMP), wrappers for constants, etc
* - DUK_USE_xxx defines are resolved based on input defines
* - Duktape Date provider settings
* - Final sanity checks
*
* DUK_F_XXX are internal feature detection macros which should not be
* used outside this header.
*
* Useful resources:
*
* http://sourceforge.net/p/predef/wiki/Home/
* http://sourceforge.net/p/predef/wiki/Architectures/
* http://stackoverflow.com/questions/5919996/how-to-detect-reliably-mac-os-x-ios-linux-windows-in-c-preprocessor
* http://en.wikipedia.org/wiki/C_data_types#Fixed-width_integer_types
*
* Preprocessor defines available in a particular GCC:
*
* gcc -dM -E - </dev/null # http://www.brain-dump.org/blog/entry/107
*/
#ifndef DUK_FEATURES_H_INCLUDED
#define DUK_FEATURES_H_INCLUDED
/*
* Compiler features
*/
#undef DUK_F_C99
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
#define DUK_F_C99
#endif
#undef DUK_F_CPP
#if defined(__cplusplus)
#define DUK_F_CPP
#endif
#undef DUK_F_CPP11
#if defined(__cplusplus) && (__cplusplus >= 201103L)
#define DUK_F_CPP11
#endif
/*
* Provides the duk_rdtsc() inline function (if available), limited to
* GCC C99.
*
* See: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
*/
/* XXX: more accurate detection of what gcc versions work; more inline
* asm versions for other compilers.
*/
#if defined(__GNUC__) && defined(__i386__) && defined(DUK_F_C99) && \
!defined(__cplusplus) /* unsigned long long not standard */
static __inline__ unsigned long long duk_rdtsc(void) {
unsigned long long int x;
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#define DUK_RDTSC_AVAILABLE 1
#elif defined(__GNUC__) && defined(__x86_64__) && defined(DUK_F_C99) && \
!defined(__cplusplus) /* unsigned long long not standard */
static __inline__ unsigned long long duk_rdtsc(void) {
unsigned hi, lo;
__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
return ((unsigned long long) lo) | (((unsigned long long) hi) << 32);
}
#define DUK_RDTSC_AVAILABLE 1
#else
/* not available */
#undef DUK_RDTSC_AVAILABLE
#endif
/*
* Intermediate platform, architecture, and compiler detection. These are
* hopelessly intertwined - e.g. architecture defines depend on compiler etc.
*
* Provide easier defines for platforms and compilers which are often tricky
* or verbose to detect. The intent is not to provide intermediate defines for
* all features; only if existing feature defines are inconvenient.
*/
/* Intel x86 (32-bit) */
#if defined(i386) || defined(__i386) || defined(__i386__) || \
defined(__i486__) || defined(__i586__) || defined(__i686__) || \
defined(__IA32__) || defined(_M_IX86) || defined(__X86__) || \
defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__)
#define DUK_F_X86
#endif
/* AMD64 (64-bit) */
#if defined(__amd64__) || defined(__amd64) || \
defined(__x86_64__) || defined(__x86_64) || \
defined(_M_X64) || defined(_M_AMD64)
#define DUK_F_X64
#endif
/* X32: 64-bit with 32-bit pointers (allows packed tvals). X32 support is
* not very mature yet.
*
* https://sites.google.com/site/x32abi/
*/
#if defined(DUK_F_X64) && \
(defined(_ILP32) || defined(__ILP32__))
#define DUK_F_X32
/* define only one of: DUK_F_X86, DUK_F_X32, or DUK_F_X64 */
#undef DUK_F_X64
#undef DUK_F_X86
#endif
/* ARM */
#if defined(__arm__) || defined(__thumb__) || defined(_ARM) || defined(_M_ARM)
#define DUK_F_ARM
#endif
/* MIPS */
/* XXX: 32-bit vs. 64-bit MIPS */
#if defined(__mips__) || defined(mips) || defined(_MIPS_ISA) || \
defined(_R3000) || defined(_R4000) || defined(_R5900) || \
defined(_MIPS_ISA_MIPS1) || defined(_MIPS_ISA_MIPS2) || \
defined(_MIPS_ISA_MIPS3) || defined(_MIPS_ISA_MIPS4) || \
defined(__mips) || defined(__MIPS__)
#define DUK_F_MIPS
#endif
/* SuperH */
#if defined(__sh__) || \
defined(__sh1__) || defined(__SH1__) || \
defined(__sh2__) || defined(__SH2__) || \
defined(__sh3__) || defined(__SH3__) || \
defined(__sh4__) || defined(__SH4__) || \
defined(__sh5__) || defined(__SH5__)
#define DUK_F_SUPERH
#endif
/* Motorola 68K. Not defined by VBCC, so user must define one of these
* manually when using VBCC.
*/
#if defined(__m68k__) || defined(M68000) || defined(__MC68K__)
#define DUK_F_M68K
#endif
/* Linux */
#if defined(__linux) || defined(__linux__) || defined(linux)
#define DUK_F_LINUX
#endif
/* FreeBSD */
#if defined(__FreeBSD__) || defined(__FreeBSD)
#define DUK_F_FREEBSD
#endif
/* NetBSD */
#if defined(__NetBSD__) || defined(__NetBSD)
#define DUK_F_NETBSD
#endif
/* OpenBSD */
#if defined(__OpenBSD__) || defined(__OpenBSD)
#define DUK_F_OPENBSD
#endif
/* BSD variant */
#if defined(DUK_F_FREEBSD) || defined(DUK_F_NETBSD) || defined(DUK_F_OPENBSD) || \
defined(__bsdi__) || defined(__DragonFly__)
#define DUK_F_BSD
#endif
/* Generic Unix (includes Cygwin) */
#if defined(__unix) || defined(__unix__) || defined(unix) || \
defined(DUK_F_LINUX) || defined(DUK_F_BSD)
#define DUK_F_UNIX
#endif
/* Cygwin */
#if defined(__CYGWIN__)
#define DUK_F_CYGWIN
#endif
/* Windows (32-bit or above) */
#if defined(_WIN32) || defined(WIN32) || defined(_WIN64) || defined(WIN64) || \
defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__)
#define DUK_F_WINDOWS
#endif
/* Atari ST TOS. __TOS__ defined by PureC (which doesn't work as a target now
* because int is 16-bit, to be fixed). No platform define in VBCC apparently,
* so to use with VBCC, user must define '__TOS__' manually.
*/
#if defined(__TOS__)
#define DUK_F_TOS
#endif
/* AmigaOS. Neither AMIGA nor __amigaos__ is defined on VBCC, so user must
* define 'AMIGA' manually.
*/
#if defined(AMIGA) || defined(__amigaos__)
#define DUK_F_AMIGAOS
#endif
/* Flash player (e.g. Crossbridge) */
#if defined(__FLASHPLAYER__)
#define DUK_F_FLASHPLAYER
#endif
/* Emscripten (provided explicitly by user), improve if possible */
#if defined(EMSCRIPTEN)
#define DUK_F_EMSCRIPTEN
#endif
/* QNX */
#if defined(__QNX__)
#define DUK_F_QNX
#endif
/* GCC and GCC version convenience define. */
#if defined(__GNUC__)
#define DUK_F_GCC
#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
/* Convenience, e.g. gcc 4.5.1 == 40501; http://stackoverflow.com/questions/6031819/emulating-gccs-builtin-unreachable */
#define DUK_F_GCC_VERSION (__GNUC__ * 10000L + __GNUC_MINOR__ * 100L + __GNUC_PATCHLEVEL__)
#else
#error cannot figure out gcc version
#endif
#endif
/* Clang */
#if defined(__clang__)
#define DUK_F_CLANG
/* It seems clang also defines __GNUC__, so undo the GCC detection. */
#if defined(DUK_F_GCC)
#undef DUK_F_GCC
#endif
#if defined(DUK_F_GCC_VERSION)
#undef DUK_F_GCC_VERSION
#endif
#endif
/* MSVC */
#if defined(_MSC_VER)
/* MSVC preprocessor defines: http://msdn.microsoft.com/en-us/library/b0084kay.aspx
* _MSC_FULL_VER includes the build number, but it has at least two formats, see e.g.
* BOOST_MSVC_FULL_VER in http://www.boost.org/doc/libs/1_52_0/boost/config/compiler/visualc.hpp
*/
#define DUK_F_MSVC
#if defined(_MSC_FULL_VER)
#if (_MSC_FULL_VER > 100000000)
#define DUK_F_MSVC_FULL_VER _MSC_FULL_VER
#else
#define DUK_F_MSCV_FULL_VER (_MSC_FULL_VER * 10)
#endif
#endif
#endif /* _MSC_VER */
/* MinGW */
#if defined(__MINGW32__) || defined(__MINGW64__)
/* NOTE: Also GCC flags are detected (DUK_F_GCC etc). */
#define DUK_F_MINGW
#endif
/* BCC (Bruce's C compiler): this is a "torture target" for compilation */
#if defined(__BCC__) || defined(__BCC_VERSION__)
#define DUK_F_BCC
#endif
#if defined(__VBCC__)
#define DUK_F_VBCC
#endif
#if (defined(DUK_F_C99) || defined(DUK_F_CPP11)) && \
!defined(DUK_F_BCC)
/* ULL / LL preprocessor constants should be avoided because they're not
* always available. With suitable options, some compilers will support
* 64-bit integer types but won't support ULL / LL preprocessor constants.
* Assume C99/C++11 environments have these. However, BCC is nominally
* C99 but doesn't support these constants.
*/
#define DUK_F_ULL_CONSTS
#endif
/*
* Platform detection, system includes, Date provider selection.
*
* Feature selection (e.g. _XOPEN_SOURCE) must happen before any system
* headers are included. This header should avoid providing any feature
* selection defines when compiling user code (only when compiling Duktape
* itself). If a feature selection option is required for user code to
* compile correctly (e.g. it is needed for type detection), it should
* probably be -checked- here, not defined here.
*
* Date provider selection seems a bit out-of-place here, but since
* the date headers and provider functions are heavily platform
* specific, there's little point in duplicating the platform if-else
* ladder. All platform specific Date provider functions are in
* duk_bi_date.c; here we provide appropriate #defines to enable them,
* and include all the necessary system headers so that duk_bi_date.c
* compiles. Date "providers" are:
*
* NOW = getting current time (required)
* TZO = getting local time offset (required)
* PRS = parse datetime (optional)
* FMT = format datetime (optional)
*
* There's a lot of duplication here, unfortunately, because many
* platforms have similar (but not identical) headers, Date providers,
* etc. The duplication could be removed by more complicated nested
* #ifdefs, but it would then be more difficult to make fixes which
* affect only a specific platform.
*
* XXX: add a way to provide custom functions to provide the critical
* primitives; this would be convenient when porting to unknown platforms
* (rather than muck with Duktape internals).
*/
#if defined(DUK_COMPILING_DUKTAPE) && \
(defined(DUK_F_LINUX) || defined(DUK_F_EMSCRIPTEN))
/* A more recent Emscripten (2014-05) seems to lack "linux" environment
* defines, so check for Emscripten explicitly.
*/
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* e.g. getdate_r */
#endif
#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE /* e.g. strptime */
#endif
#endif
#if defined(DUK_F_QNX) && defined(DUK_COMPILING_DUKTAPE)
/* See: /opt/qnx650/target/qnx6/usr/include/sys/platform.h */
#define _XOPEN_SOURCE 600
#define _POSIX_C_SOURCE 200112L
#endif
#undef DUK_F_MSVC_CRT_SECURE
#if defined(DUK_F_WINDOWS) && defined(_MSC_VER)
/* http://msdn.microsoft.com/en-us/library/8ef0s5kh.aspx
* http://msdn.microsoft.com/en-us/library/wd3wzwts.aspx
* Seem to be available since VS2005.
*/
#if (_MSC_VER >= 1400)
/* VS2005+, secure CRT functions are preferred. Windows Store applications
* (and probably others) should use these.
*/
#define DUK_F_MSVC_CRT_SECURE
#endif
#if (_MSC_VER < 1700)
/* VS2012+ has stdint.h, < VS2012 does not (but it's available for download). */
#define DUK_F_NO_STDINT_H
#endif
/* Initial fix: disable secure CRT related warnings when compiling Duktape
* itself (must be defined before including Windows headers). Don't define
* for user code including duktape.h.
*/
#if defined(DUK_COMPILING_DUKTAPE) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#endif /* DUK_F_WINDOWS && _MSC_VER */
#if defined(DUK_F_TOS) || defined(DUK_F_BCC)
#define DUK_F_NO_STDINT_H
#endif
/* Workaround for older C++ compilers before including <inttypes.h>,
* see e.g.: https://sourceware.org/bugzilla/show_bug.cgi?id=15366
*/
#if defined(__cplusplus) && !defined(__STDC_LIMIT_MACROS)
#define __STDC_LIMIT_MACROS
#endif
#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS)
#define __STDC_CONSTANT_MACROS
#endif
#if defined(__APPLE__)
/* Mac OSX, iPhone, Darwin */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <architecture/byte_order.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_OPENBSD)
/* http://www.monkey.org/openbsd/archive/ports/0401/msg00089.html */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#include <sys/endian.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_BSD)
/* other BSD */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#include <sys/endian.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_TOS)
/* Atari ST TOS */
#define DUK_USE_DATE_NOW_TIME
#define DUK_USE_DATE_TZO_GMTIME
/* no parsing (not an error) */
#define DUK_USE_DATE_FMT_STRFTIME
#include <limits.h>
#include <time.h>
#elif defined(DUK_F_AMIGAOS)
#if defined(DUK_F_M68K)
/* AmigaOS on M68k */
#define DUK_USE_DATE_NOW_TIME
#define DUK_USE_DATE_TZO_GMTIME
/* no parsing (not an error) */
#define DUK_USE_DATE_FMT_STRFTIME
#include <limits.h>
#include <time.h>
#else
#error AmigaOS but not M68K, not supported now
#endif
#elif defined(DUK_F_WINDOWS)
/* Windows 32-bit and 64-bit are currently the same. */
/* MSVC does not have sys/param.h */
#define DUK_USE_DATE_NOW_WINDOWS
#define DUK_USE_DATE_TZO_WINDOWS
/* Note: PRS and FMT are intentionally left undefined for now. This means
* there is no platform specific date parsing/formatting but there is still
* the ISO 8601 standard format.
*/
#include <windows.h>
#include <limits.h>
#elif defined(DUK_F_FLASHPLAYER)
/* Crossbridge */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <endian.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_QNX)
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_LINUX)
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#if defined(DUK_F_BCC)
/* no endian.h */
#else
#include <endian.h>
#endif /* DUK_F_BCC */
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(__posix)
/* POSIX */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#include <endian.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#elif defined(DUK_F_CYGWIN)
/* Cygwin -- don't use strptime() for now */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#include <endian.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#else
/* Other UNIX, hopefully others */
#define DUK_USE_DATE_NOW_GETTIMEOFDAY
#define DUK_USE_DATE_TZO_GMTIME_R
#define DUK_USE_DATE_PRS_STRPTIME
#define DUK_USE_DATE_FMT_STRFTIME
#include <sys/types.h>
#if defined(DUK_F_BCC)
/* no endian.h */
#else
#include <endian.h>
#endif /* DUK_F_BCC */
#include <limits.h>
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#endif
/* Shared includes */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h> /* varargs */
#include <setjmp.h>
#include <stddef.h> /* e.g. ptrdiff_t */
#if defined(DUK_F_NO_STDINT_H)
/* stdint.h not available */
#else
/* Technically C99 (C++11) but found in many systems. Note the workaround
* above for some C++ compilers (__STDC_LIMIT_MACROS etc).
*/
#include <stdint.h>
#endif
#include <math.h>
/*
* Detection for specific libc variants (like uclibc) and other libc specific
* features. Potentially depends on the #includes above.
*/
#if defined(__UCLIBC__)
#define DUK_F_UCLIBC
#endif
/*
* Wrapper typedefs and constants for integer types, also sanity check types.
*
* C99 typedefs are quite good but not always available, and we want to avoid
* forcibly redefining the C99 typedefs. So, there are Duktape wrappers for
* all C99 typedefs and Duktape code should only use these typedefs. Type
* detection when C99 is not supported is best effort and may end up detecting
* some types incorrectly.
*
* Pointer sizes are a portability problem: pointers to different types may
* have a different size and function pointers are very difficult to manage
* portably.
*
* http://en.wikipedia.org/wiki/C_data_types#Fixed-width_integer_types
*
* Note: there's an interesting corner case when trying to define minimum
* signed integer value constants which leads to the current workaround of
* defining e.g. -0x80000000 as (-0x7fffffffL - 1L). See doc/code-issues.txt
* for a longer discussion.
*
* Note: avoid typecasts and computations in macro integer constants as they
* can then no longer be used in macro relational expressions (such as
* #if DUK_SIZE_MAX < 0xffffffffUL). There is internal code which relies on
* being able to compare DUK_SIZE_MAX against a limit.
*/
/* XXX: add feature options to force basic types from outside? */
#if !defined(INT_MAX)
#error INT_MAX not defined
#endif
/* Check that architecture is two's complement, standard C allows e.g.
* INT_MIN to be -2**31+1 (instead of -2**31).
*/
#if defined(INT_MAX) && defined(INT_MIN)
#if INT_MAX != -(INT_MIN + 1)
#error platform does not seem complement of two
#endif
#else
#error cannot check complement of two
#endif
/* Pointer size determination based on architecture.
* XXX: unsure about BCC correctness.
*/
#if defined(DUK_F_X86) || defined(DUK_F_X32) || \
defined(DUK_F_BCC) || \
(defined(__WORDSIZE) && (__WORDSIZE == 32))
#define DUK_F_32BIT_PTRS
#elif defined(DUK_F_X64) || \
(defined(__WORDSIZE) && (__WORDSIZE == 64))
#define DUK_F_64BIT_PTRS
#else
/* not sure, not needed with C99 anyway */
#endif
/* Intermediate define for 'have inttypes.h' */
#undef DUK_F_HAVE_INTTYPES
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!(defined(DUK_F_AMIGAOS) && defined(DUK_F_VBCC))
/* vbcc + AmigaOS has C99 but no inttypes.h */
#define DUK_F_HAVE_INTTYPES
#elif defined(__cplusplus) && (__cplusplus >= 201103L)
/* C++11 apparently ratified stdint.h */
#define DUK_F_HAVE_INTTYPES
#endif
/* Basic integer typedefs and limits, preferably from inttypes.h, otherwise
* through automatic detection.
*/
#if defined(DUK_F_HAVE_INTTYPES)
/* C99 or compatible */
#define DUK_F_HAVE_64BIT
#include <inttypes.h>
typedef uint8_t duk_uint8_t;
typedef int8_t duk_int8_t;
typedef uint16_t duk_uint16_t;
typedef int16_t duk_int16_t;
typedef uint32_t duk_uint32_t;
typedef int32_t duk_int32_t;
typedef uint64_t duk_uint64_t;
typedef int64_t duk_int64_t;
typedef uint_least8_t duk_uint_least8_t;
typedef int_least8_t duk_int_least8_t;
typedef uint_least16_t duk_uint_least16_t;
typedef int_least16_t duk_int_least16_t;
typedef uint_least32_t duk_uint_least32_t;
typedef int_least32_t duk_int_least32_t;
typedef uint_least64_t duk_uint_least64_t;
typedef int_least64_t duk_int_least64_t;
typedef uint_fast8_t duk_uint_fast8_t;
typedef int_fast8_t duk_int_fast8_t;
typedef uint_fast16_t duk_uint_fast16_t;
typedef int_fast16_t duk_int_fast16_t;
typedef uint_fast32_t duk_uint_fast32_t;
typedef int_fast32_t duk_int_fast32_t;
typedef uint_fast64_t duk_uint_fast64_t;
typedef int_fast64_t duk_int_fast64_t;
typedef uintptr_t duk_uintptr_t;
typedef intptr_t duk_intptr_t;
typedef uintmax_t duk_uintmax_t;
typedef intmax_t duk_intmax_t;
#define DUK_UINT8_MIN 0
#define DUK_UINT8_MAX UINT8_MAX
#define DUK_INT8_MIN INT8_MIN
#define DUK_INT8_MAX INT8_MAX
#define DUK_UINT_LEAST8_MIN 0
#define DUK_UINT_LEAST8_MAX UINT_LEAST8_MAX
#define DUK_INT_LEAST8_MIN INT_LEAST8_MIN
#define DUK_INT_LEAST8_MAX INT_LEAST8_MAX
#define DUK_UINT_FAST8_MIN 0
#define DUK_UINT_FAST8_MAX UINT_FAST8_MAX
#define DUK_INT_FAST8_MIN INT_FAST8_MIN
#define DUK_INT_FAST8_MAX INT_FAST8_MAX
#define DUK_UINT16_MIN 0
#define DUK_UINT16_MAX UINT16_MAX
#define DUK_INT16_MIN INT16_MIN
#define DUK_INT16_MAX INT16_MAX
#define DUK_UINT_LEAST16_MIN 0
#define DUK_UINT_LEAST16_MAX UINT_LEAST16_MAX
#define DUK_INT_LEAST16_MIN INT_LEAST16_MIN
#define DUK_INT_LEAST16_MAX INT_LEAST16_MAX
#define DUK_UINT_FAST16_MIN 0
#define DUK_UINT_FAST16_MAX UINT_FAST16_MAX
#define DUK_INT_FAST16_MIN INT_FAST16_MIN
#define DUK_INT_FAST16_MAX INT_FAST16_MAX
#define DUK_UINT32_MIN 0
#define DUK_UINT32_MAX UINT32_MAX
#define DUK_INT32_MIN INT32_MIN
#define DUK_INT32_MAX INT32_MAX
#define DUK_UINT_LEAST32_MIN 0
#define DUK_UINT_LEAST32_MAX UINT_LEAST32_MAX
#define DUK_INT_LEAST32_MIN INT_LEAST32_MIN
#define DUK_INT_LEAST32_MAX INT_LEAST32_MAX
#define DUK_UINT_FAST32_MIN 0
#define DUK_UINT_FAST32_MAX UINT_FAST32_MAX
#define DUK_INT_FAST32_MIN INT_FAST32_MIN
#define DUK_INT_FAST32_MAX INT_FAST32_MAX
#define DUK_UINT64_MIN 0
#define DUK_UINT64_MAX UINT64_MAX
#define DUK_INT64_MIN INT64_MIN
#define DUK_INT64_MAX INT64_MAX
#define DUK_UINT_LEAST64_MIN 0
#define DUK_UINT_LEAST64_MAX UINT_LEAST64_MAX
#define DUK_INT_LEAST64_MIN INT_LEAST64_MIN
#define DUK_INT_LEAST64_MAX INT_LEAST64_MAX
#define DUK_UINT_FAST64_MIN 0
#define DUK_UINT_FAST64_MAX UINT_FAST64_MAX
#define DUK_INT_FAST64_MIN INT_FAST64_MIN
#define DUK_INT_FAST64_MAX INT_FAST64_MAX
#define DUK_UINTPTR_MIN 0
#define DUK_UINTPTR_MAX UINTPTR_MAX
#define DUK_INTPTR_MIN INTPTR_MIN
#define DUK_INTPTR_MAX INTPTR_MAX
#define DUK_UINTMAX_MIN 0
#define DUK_UINTMAX_MAX UINTMAX_MAX
#define DUK_INTMAX_MIN INTMAX_MIN
#define DUK_INTMAX_MAX INTMAX_MAX
#define DUK_SIZE_MIN 0
#define DUK_SIZE_MAX SIZE_MAX
#else /* C99 types */
/* When C99 types are not available, we use heuristic detection to get
* the basic 8, 16, 32, and (possibly) 64 bit types. The fast/least
* types are then assumed to be exactly the same for now: these could
* be improved per platform but C99 types are very often now available.
* 64-bit types are not available on all platforms; this is OK at least
* on 32-bit platforms.
*
* This detection code is necessarily a bit hacky and can provide typedefs
* and defines that won't work correctly on some exotic platform.
*/
#if (defined(CHAR_BIT) && (CHAR_BIT == 8)) || \
(defined(UCHAR_MAX) && (UCHAR_MAX == 255))
typedef unsigned char duk_uint8_t;
typedef signed char duk_int8_t;
#else
#error cannot detect 8-bit type
#endif
#if defined(USHRT_MAX) && (USHRT_MAX == 65535UL)
typedef unsigned short duk_uint16_t;
typedef signed short duk_int16_t;
#elif defined(UINT_MAX) && (UINT_MAX == 65535UL)
/* On some platforms int is 16-bit but long is 32-bit (e.g. PureC) */
typedef unsigned int duk_uint16_t;
typedef signed int duk_int16_t;
#else
#error cannot detect 16-bit type
#endif
#if defined(UINT_MAX) && (UINT_MAX == 4294967295UL)
typedef unsigned int duk_uint32_t;
typedef signed int duk_int32_t;
#elif defined(ULONG_MAX) && (ULONG_MAX == 4294967295UL)
/* On some platforms int is 16-bit but long is 32-bit (e.g. PureC) */
typedef unsigned long duk_uint32_t;
typedef signed long duk_int32_t;
#else
#error cannot detect 32-bit type
#endif
/* 64-bit type detection is a bit tricky.
*
* ULLONG_MAX is a standard define. __LONG_LONG_MAX__ and __ULONG_LONG_MAX__
* are used by at least GCC (even if system headers don't provide ULLONG_MAX).
* Some GCC variants may provide __LONG_LONG_MAX__ but not __ULONG_LONG_MAX__.
*
* ULL / LL constants are rejected / warned about by some compilers, even if
* the compiler has a 64-bit type and the compiler/system headers provide an
* unsupported constant (ULL/LL)! Try to avoid using ULL / LL constants.
* As a side effect we can only check that e.g. ULONG_MAX is larger than 32
* bits but can't be sure it is exactly 64 bits. Self tests will catch such
* cases.
*/
#undef DUK_F_HAVE_64BIT
#if !defined(DUK_F_HAVE_64BIT) && defined(ULONG_MAX)
#if (ULONG_MAX > 4294967295UL)
#define DUK_F_HAVE_64BIT
typedef unsigned long duk_uint64_t;
typedef signed long duk_int64_t;
#endif
#endif
#if !defined(DUK_F_HAVE_64BIT) && defined(ULLONG_MAX)
#if (ULLONG_MAX > 4294967295UL)
#define DUK_F_HAVE_64BIT
typedef unsigned long long duk_uint64_t;
typedef signed long long duk_int64_t;
#endif
#endif
#if !defined(DUK_F_HAVE_64BIT) && defined(__ULONG_LONG_MAX__)
#if (__ULONG_LONG_MAX__ > 4294967295UL)
#define DUK_F_HAVE_64BIT
typedef unsigned long long duk_uint64_t;
typedef signed long long duk_int64_t;
#endif
#endif
#if !defined(DUK_F_HAVE_64BIT) && defined(__LONG_LONG_MAX__)
#if (__LONG_LONG_MAX__ > 2147483647L)
#define DUK_F_HAVE_64BIT
typedef unsigned long long duk_uint64_t;
typedef signed long long duk_int64_t;
#endif
#endif
#if !defined(DUK_F_HAVE_64BIT) && \
(defined(DUK_F_MINGW) || defined(DUK_F_MSVC))
/* Both MinGW and MSVC have a 64-bit type. */
#define DUK_F_HAVE_64BIT
typedef unsigned long duk_uint64_t;
typedef signed long duk_int64_t;
#endif
#if !defined(DUK_F_HAVE64BIT)
/* cannot detect 64-bit type, not always needed so don't error */
#endif
typedef duk_uint8_t duk_uint_least8_t;
typedef duk_int8_t duk_int_least8_t;
typedef duk_uint16_t duk_uint_least16_t;
typedef duk_int16_t duk_int_least16_t;
typedef duk_uint32_t duk_uint_least32_t;
typedef duk_int32_t duk_int_least32_t;
typedef duk_uint8_t duk_uint_fast8_t;
typedef duk_int8_t duk_int_fast8_t;
typedef duk_uint16_t duk_uint_fast16_t;
typedef duk_int16_t duk_int_fast16_t;
typedef duk_uint32_t duk_uint_fast32_t;
typedef duk_int32_t duk_int_fast32_t;
#if defined(DUK_F_HAVE_64BIT)
typedef duk_uint64_t duk_uint_least64_t;
typedef duk_int64_t duk_int_least64_t;
typedef duk_uint64_t duk_uint_fast64_t;
typedef duk_int64_t duk_int_fast64_t;
#endif
#if defined(DUK_F_HAVE_64BIT)
typedef duk_uint64_t duk_uintmax_t;
typedef duk_int64_t duk_intmax_t;
#else
typedef duk_uint32_t duk_uintmax_t;
typedef duk_int32_t duk_intmax_t;
#endif
/* Note: the funny looking computations for signed minimum 16-bit, 32-bit, and
* 64-bit values are intentional as the obvious forms (e.g. -0x80000000L) are
* -not- portable. See code-issues.txt for a detailed discussion.
*/
#define DUK_UINT8_MIN 0UL
#define DUK_UINT8_MAX 0xffUL
#define DUK_INT8_MIN (-0x80L)
#define DUK_INT8_MAX 0x7fL
#define DUK_UINT_LEAST8_MIN 0UL
#define DUK_UINT_LEAST8_MAX 0xffUL
#define DUK_INT_LEAST8_MIN (-0x80L)
#define DUK_INT_LEAST8_MAX 0x7fL
#define DUK_UINT_FAST8_MIN 0UL
#define DUK_UINT_FAST8_MAX 0xffUL
#define DUK_INT_FAST8_MIN (-0x80L)
#define DUK_INT_FAST8_MAX 0x7fL
#define DUK_UINT16_MIN 0UL
#define DUK_UINT16_MAX 0xffffUL
#define DUK_INT16_MIN (-0x7fffL - 1L)
#define DUK_INT16_MAX 0x7fffL
#define DUK_UINT_LEAST16_MIN 0UL
#define DUK_UINT_LEAST16_MAX 0xffffUL
#define DUK_INT_LEAST16_MIN (-0x7fffL - 1L)
#define DUK_INT_LEAST16_MAX 0x7fffL
#define DUK_UINT_FAST16_MIN 0UL
#define DUK_UINT_FAST16_MAX 0xffffUL
#define DUK_INT_FAST16_MIN (-0x7fffL - 1L)
#define DUK_INT_FAST16_MAX 0x7fffL
#define DUK_UINT32_MIN 0UL
#define DUK_UINT32_MAX 0xffffffffUL
#define DUK_INT32_MIN (-0x7fffffffL - 1L)
#define DUK_INT32_MAX 0x7fffffffL
#define DUK_UINT_LEAST32_MIN 0UL
#define DUK_UINT_LEAST32_MAX 0xffffffffUL
#define DUK_INT_LEAST32_MIN (-0x7fffffffL - 1L)
#define DUK_INT_LEAST32_MAX 0x7fffffffL
#define DUK_UINT_FAST32_MIN 0UL
#define DUK_UINT_FAST32_MAX 0xffffffffUL
#define DUK_INT_FAST32_MIN (-0x7fffffffL - 1L)