382 lines
11 KiB
C
382 lines
11 KiB
C
#ifndef MUPDF_FITZ_SYSTEM_H
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#define MUPDF_FITZ_SYSTEM_H
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/* Turn on valgrind pacification in debug builds. */
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#ifndef NDEBUG
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#ifndef PACIFY_VALGRIND
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#define PACIFY_VALGRIND
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#endif
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#endif
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/*
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Include the standard libc headers.
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*/
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#include <stddef.h> /* needed for size_t */
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#include <stdarg.h> /* needed for va_list vararg functions */
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#include <setjmp.h> /* needed for the try/catch macros */
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#include <stdio.h> /* useful for debug printfs */
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#if defined(_MSC_VER) && (_MSC_VER < 1700) /* MSVC older than VS2012 */
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typedef signed char int8_t;
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typedef short int int16_t;
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typedef int int32_t;
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typedef __int64 int64_t;
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typedef unsigned char uint8_t;
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typedef unsigned short int uint16_t;
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typedef unsigned int uint32_t;
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typedef unsigned __int64 uint64_t;
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#ifndef INT64_MAX
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#define INT64_MAX 9223372036854775807i64
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#endif
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#else
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#include <stdint.h> /* needed for int64_t */
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#endif
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#include "mupdf/memento.h"
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#include "mupdf/fitz/track-usage.h"
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#define nelem(x) (sizeof(x)/sizeof((x)[0]))
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#define FZ_PI 3.14159265f
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#define FZ_RADIAN 57.2957795f
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#define FZ_DEGREE 0.017453292f
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#define FZ_SQRT2 1.41421356f
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#define FZ_LN2 0.69314718f
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/*
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Spot architectures where we have optimisations.
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*/
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#if defined(__arm__) || defined(__thumb__)
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#ifndef ARCH_ARM
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#define ARCH_ARM
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#endif
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#endif
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/*
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Some differences in libc can be smoothed over
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*/
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#ifndef __STRICT_ANSI__
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#if defined(__APPLE__)
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#ifndef HAVE_SIGSETJMP
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#define HAVE_SIGSETJMP 1
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#endif
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#elif defined(__unix)
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#ifndef __EMSCRIPTEN__
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#ifndef HAVE_SIGSETJMP
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#define HAVE_SIGSETJMP 1
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#endif
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#endif
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#endif
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#endif
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#ifndef HAVE_SIGSETJMP
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#define HAVE_SIGSETJMP 0
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#endif
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/*
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Where possible (i.e. on platforms on which they are provided), use
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sigsetjmp/siglongjmp in preference to setjmp/longjmp. We don't alter
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signal handlers within mupdf, so there is no need for us to
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store/restore them - hence we use the non-restoring variants. This
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makes a large speed difference on MacOSX (and probably other
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platforms too.
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*/
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#if HAVE_SIGSETJMP
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#define fz_setjmp(BUF) sigsetjmp(BUF, 0)
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#define fz_longjmp(BUF,VAL) siglongjmp(BUF, VAL)
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#define fz_jmp_buf sigjmp_buf
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#else
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#define fz_setjmp(BUF) setjmp(BUF)
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#define fz_longjmp(BUF,VAL) longjmp(BUF,VAL)
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#define fz_jmp_buf jmp_buf
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#endif
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/* these constants mirror the corresponding macros in stdio.h */
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#ifndef EOF
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#define EOF (-1)
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#endif
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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#ifndef SEEK_CUR
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#define SEEK_CUR 1
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2
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#endif
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#ifdef _MSC_VER /* Microsoft Visual C */
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/* MSVC up to VS2012 */
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#if _MSC_VER < 1800
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static __inline int signbit(double x)
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{
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union
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{
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double d;
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__int64 i;
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} u;
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u.d = x;
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return (int)(u.i>>63);
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}
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#endif
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#pragma warning( disable: 4244 ) /* conversion from X to Y, possible loss of data */
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#pragma warning( disable: 4701 ) /* Potentially uninitialized local variable 'name' used */
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#pragma warning( disable: 4996 ) /* 'function': was declared deprecated */
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#if _MSC_VER <= 1700 /* MSVC 2012 */
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#define isnan(x) _isnan(x)
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#define isinf(x) (!_finite(x))
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#endif
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#define hypotf _hypotf
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#define atoll _atoi64
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#endif
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#ifdef _WIN32
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char *fz_utf8_from_wchar(const wchar_t *s);
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wchar_t *fz_wchar_from_utf8(const char *s);
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/* really a FILE* but we don't want to include stdio.h here */
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void *fz_fopen_utf8(const char *name, const char *mode);
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int fz_remove_utf8(const char *name);
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char **fz_argv_from_wargv(int argc, wchar_t **wargv);
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void fz_free_argv(int argc, char **argv);
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#endif
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/* Cope with systems (such as Windows) with no S_ISDIR */
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#ifndef S_ISDIR
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#define S_ISDIR(mode) ((mode) & S_IFDIR)
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#endif
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/* inline is standard in C++. For some compilers we can enable it within C too. */
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#ifndef __cplusplus
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#if defined (__STDC_VERSION_) && (__STDC_VERSION__ >= 199901L) /* C99 */
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#elif defined(_MSC_VER) && (_MSC_VER >= 1500) /* MSVC 9 or newer */
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#define inline __inline
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#elif defined(__GNUC__) && (__GNUC__ >= 3) /* GCC 3 or newer */
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#define inline __inline
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#else /* Unknown or ancient */
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#define inline
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#endif
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#endif
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/* restrict is standard in C99, but not in all C++ compilers. */
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#if defined (__STDC_VERSION_) && (__STDC_VERSION__ >= 199901L) /* C99 */
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#define FZ_RESTRICT restrict
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#elif defined(_MSC_VER) && (_MSC_VER >= 1600) /* MSVC 10 or newer */
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#define FZ_RESTRICT __restrict
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#elif defined(__GNUC__) && (__GNUC__ >= 3) /* GCC 3 or newer */
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#define FZ_RESTRICT __restrict
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#else /* Unknown or ancient */
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#define FZ_RESTRICT
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#endif
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/* noreturn is a GCC extension */
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#ifdef __GNUC__
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#define FZ_NORETURN __attribute__((noreturn))
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#else
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#ifdef _MSC_VER
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#define FZ_NORETURN __declspec(noreturn)
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#else
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#define FZ_NORETURN
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#endif
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#endif
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/* Flag unused parameters, for use with 'static inline' functions in headers. */
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#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7)
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#define FZ_UNUSED __attribute__((__unused__))
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#else
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#define FZ_UNUSED
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#endif
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/* GCC can do type checking of printf strings */
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#ifdef __printflike
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#define FZ_PRINTFLIKE(F,V) __printflike(F,V)
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#else
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#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7)
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#define FZ_PRINTFLIKE(F,V) __attribute__((__format__ (__printf__, F, V)))
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#else
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#define FZ_PRINTFLIKE(F,V)
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#endif
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#endif
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/* ARM assembly specific defines */
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#ifdef ARCH_ARM
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/* If we're compiling as thumb code, then we need to tell the compiler
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* to enter and exit ARM mode around our assembly sections. If we move
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* the ARM functions to a separate file and arrange for it to be compiled
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* without thumb mode, we can save some time on entry.
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*/
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/* This is slightly suboptimal; __thumb__ and __thumb2__ become defined
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* and undefined by #pragma arm/#pragma thumb - but we can't define a
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* macro to track that. */
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#if defined(__thumb__) || defined(__thumb2__)
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#define ENTER_ARM ".balign 4\nmov r12,pc\nbx r12\n0:.arm\n"
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#define ENTER_THUMB "9:.thumb\n"
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#else
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#define ENTER_ARM
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#define ENTER_THUMB
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#endif
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#endif
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#ifdef CLUSTER
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/* Include this first so our defines don't clash with the system definitions */
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#include <math.h>
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/*
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* Trig functions
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*/
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static float
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my_atan_table[258] =
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{
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0.0000000000f, 0.00390623013f,0.00781234106f,0.0117182136f,
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0.0156237286f, 0.0195287670f, 0.0234332099f, 0.0273369383f,
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0.0312398334f, 0.0351417768f, 0.0390426500f, 0.0429423347f,
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0.0468407129f, 0.0507376669f, 0.0546330792f, 0.0585268326f,
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0.0624188100f, 0.0663088949f, 0.0701969711f, 0.0740829225f,
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0.0779666338f, 0.0818479898f, 0.0857268758f, 0.0896031775f,
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0.0934767812f, 0.0973475735f, 0.1012154420f, 0.1050802730f,
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0.1089419570f, 0.1128003810f, 0.1166554350f, 0.1205070100f,
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0.1243549950f, 0.1281992810f, 0.1320397620f, 0.1358763280f,
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0.1397088740f, 0.1435372940f, 0.1473614810f, 0.1511813320f,
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0.1549967420f, 0.1588076080f, 0.1626138290f, 0.1664153010f,
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0.1702119250f, 0.1740036010f, 0.1777902290f, 0.1815717110f,
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0.1853479500f, 0.1891188490f, 0.1928843120f, 0.1966442450f,
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0.2003985540f, 0.2041471450f, 0.2078899270f, 0.2116268090f,
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0.2153577000f, 0.2190825110f, 0.2228011540f, 0.2265135410f,
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0.2302195870f, 0.2339192060f, 0.2376123140f, 0.2412988270f,
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0.2449786630f, 0.2486517410f, 0.2523179810f, 0.2559773030f,
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0.2596296290f, 0.2632748830f, 0.2669129880f, 0.2705438680f,
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0.2741674510f, 0.2777836630f, 0.2813924330f, 0.2849936890f,
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0.2885873620f, 0.2921733830f, 0.2957516860f, 0.2993222020f,
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0.3028848680f, 0.3064396190f, 0.3099863910f, 0.3135251230f,
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0.3170557530f, 0.3205782220f, 0.3240924700f, 0.3275984410f,
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0.3310960770f, 0.3345853220f, 0.3380661230f, 0.3415384250f,
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0.3450021770f, 0.3484573270f, 0.3519038250f, 0.3553416220f,
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0.3587706700f, 0.3621909220f, 0.3656023320f, 0.3690048540f,
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0.3723984470f, 0.3757830650f, 0.3791586690f, 0.3825252170f,
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0.3858826690f, 0.3892309880f, 0.3925701350f, 0.3959000740f,
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0.3992207700f, 0.4025321870f, 0.4058342930f, 0.4091270550f,
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0.4124104420f, 0.4156844220f, 0.4189489670f, 0.4222040480f,
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0.4254496370f, 0.4286857080f, 0.4319122350f, 0.4351291940f,
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0.4383365600f, 0.4415343100f, 0.4447224240f, 0.4479008790f,
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0.4510696560f, 0.4542287350f, 0.4573780990f, 0.4605177290f,
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0.4636476090f, 0.4667677240f, 0.4698780580f, 0.4729785980f,
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0.4760693300f, 0.4791502430f, 0.4822213240f, 0.4852825630f,
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0.4883339510f, 0.4913754780f, 0.4944071350f, 0.4974289160f,
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0.5004408130f, 0.5034428210f, 0.5064349340f, 0.5094171490f,
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0.5123894600f, 0.5153518660f, 0.5183043630f, 0.5212469510f,
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0.5241796290f, 0.5271023950f, 0.5300152510f, 0.5329181980f,
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0.5358112380f, 0.5386943730f, 0.5415676050f, 0.5444309400f,
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0.5472843810f, 0.5501279330f, 0.5529616020f, 0.5557853940f,
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0.5585993150f, 0.5614033740f, 0.5641975770f, 0.5669819340f,
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0.5697564530f, 0.5725211450f, 0.5752760180f, 0.5780210840f,
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0.5807563530f, 0.5834818390f, 0.5861975510f, 0.5889035040f,
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0.5915997100f, 0.5942861830f, 0.5969629370f, 0.5996299860f,
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0.6022873460f, 0.6049350310f, 0.6075730580f, 0.6102014430f,
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0.6128202020f, 0.6154293530f, 0.6180289120f, 0.6206188990f,
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0.6231993300f, 0.6257702250f, 0.6283316020f, 0.6308834820f,
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0.6334258830f, 0.6359588250f, 0.6384823300f, 0.6409964180f,
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0.6435011090f, 0.6459964250f, 0.6484823880f, 0.6509590190f,
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0.6534263410f, 0.6558843770f, 0.6583331480f, 0.6607726790f,
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0.6632029930f, 0.6656241120f, 0.6680360620f, 0.6704388650f,
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0.6728325470f, 0.6752171330f, 0.6775926450f, 0.6799591110f,
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0.6823165550f, 0.6846650020f, 0.6870044780f, 0.6893350100f,
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0.6916566220f, 0.6939693410f, 0.6962731940f, 0.6985682070f,
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0.7008544080f, 0.7031318220f, 0.7054004770f, 0.7076604000f,
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0.7099116190f, 0.7121541600f, 0.7143880520f, 0.7166133230f,
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0.7188300000f, 0.7210381110f, 0.7232376840f, 0.7254287490f,
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0.7276113330f, 0.7297854640f, 0.7319511710f, 0.7341084830f,
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0.7362574290f, 0.7383980370f, 0.7405303370f, 0.7426543560f,
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0.7447701260f, 0.7468776740f, 0.7489770290f, 0.7510682220f,
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0.7531512810f, 0.7552262360f, 0.7572931160f, 0.7593519510f,
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0.7614027700f, 0.7634456020f, 0.7654804790f, 0.7675074280f,
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0.7695264800f, 0.7715376650f, 0.7735410110f, 0.7755365500f,
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0.7775243100f, 0.7795043220f, 0.7814766150f, 0.7834412190f,
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0.7853981630f, 0.7853981630f /* Extended by 1 for interpolation */
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};
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static inline float my_sinf(float x)
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{
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float x2, xn;
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int i;
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/* Map x into the -PI to PI range. We could do this using:
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* x = fmodf(x, 2.0f * FZ_PI);
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* but that's C99, and seems to misbehave with negative numbers
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* on some platforms. */
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x -= FZ_PI;
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i = x / (2.0f * FZ_PI);
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x -= i * 2.0f * FZ_PI;
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if (x < 0.0f)
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x += 2.0f * FZ_PI;
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x -= FZ_PI;
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if (x <= -FZ_PI / 2.0f)
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x = -FZ_PI - x;
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else if (x >= FZ_PI / 2.0f)
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x = FZ_PI-x;
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x2 = x * x;
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xn = x * x2 / 6.0f;
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x -= xn;
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xn *= x2 / 20.0f;
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x += xn;
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xn *= x2 / 42.0f;
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x -= xn;
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xn *= x2 / 72.0f;
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x += xn;
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return x;
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}
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static inline float my_atan2f(float o, float a)
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{
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int negate = 0, flip = 0, i;
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float r, s;
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if (o == 0.0f)
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{
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if (a > 0)
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return 0.0f;
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else
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return FZ_PI;
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}
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if (o < 0)
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o = -o, negate = 1;
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if (a < 0)
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a = -a, flip = 1;
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if (o < a)
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i = 65536.0f * o / a + 0.5f;
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else
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i = 65536.0f * a / o + 0.5f;
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r = my_atan_table[i >> 8];
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s = my_atan_table[(i >> 8) + 1];
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r += (s - r) * (i & 255) / 256.0f;
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if (o >= a)
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r = FZ_PI / 2.0f - r;
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if (flip)
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r = FZ_PI - r;
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if (negate)
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r = -r;
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return r;
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}
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#define sinf(x) my_sinf(x)
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#define cosf(x) my_sinf(FZ_PI / 2.0f + (x))
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#define atan2f(x,y) my_atan2f((x),(y))
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#endif
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static inline int fz_is_pow2(int a)
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{
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return (a != 0) && (a & (a-1)) == 0;
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}
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#endif
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