The Tor Browser: intl/icu/source/common/putilimp.h@129ffea94266 (annotated)

intl/icu/source/common/putilimp.h@129ffea94266 (annotated)

intl/icu/source/common/putilimp.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
 ******************************************************************************
 *
 *   Copyright (C) 1997-2013, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 *
 *  FILE NAME : putilimp.h
 *
 *   Date        Name        Description
 *   10/17/04    grhoten     Move internal functions from putil.h to this file.
 ******************************************************************************
 */
 #ifndef PUTILIMP_H
 #define PUTILIMP_H
 #include "unicode/utypes.h"
 #include "unicode/putil.h"
 /**
  * \def U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
  * Nearly all CPUs and compilers implement a right-shift of a signed integer
  * as an Arithmetic Shift Right which copies the sign bit (the Most Significant Bit (MSB))
  * into the vacated bits (sign extension).
  * For example, (int32_t)0xfff5fff3>>4 becomes 0xffff5fff and -1>>1=-1.
  *
  * This can be useful for storing a signed value in the upper bits
  * and another bit field in the lower bits.
  * The signed value can be retrieved by simple right-shifting.
  *
  * This is consistent with the Java language.
  *
  * However, the C standard allows compilers to implement a right-shift of a signed integer
  * as a Logical Shift Right which copies a 0 into the vacated bits.
  * For example, (int32_t)0xfff5fff3>>4 becomes 0x0fff5fff and -1>>1=0x7fffffff.
  *
  * Code that depends on the natural behavior should be guarded with this macro,
  * with an alternate path for unusual platforms.
  * @internal
  */
 #ifdef U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
     /* Use the predefined value. */
 #else
     /*
      * Nearly all CPUs & compilers implement a right-shift of a signed integer
      * as an Arithmetic Shift Right (with sign extension).
      */
 #   define U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 1
 #endif
 /** Define this to 1 if your platform supports IEEE 754 floating point,
    to 0 if it does not. */
 #ifndef IEEE_754
 #   define IEEE_754 1
 #endif
 /**
  * uintptr_t is an optional part of the standard definitions in stdint.h.
  * The opengroup.org documentation for stdint.h says
  * "On XSI-conformant systems, the intptr_t and uintptr_t types are required;
  * otherwise, they are optional."
  * We assume that when uintptr_t is defined, UINTPTR_MAX is defined as well.
  *
  * Do not use ptrdiff_t since it is signed. size_t is unsigned.
  */
 /* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */
 #if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390)
 typedef size_t uintptr_t;
 #endif
 /**
  * \def U_HAVE_MSVC_2003_OR_EARLIER
  * Flag for workaround of MSVC 2003 optimization bugs
  * @internal
  */
 #if !defined(U_HAVE_MSVC_2003_OR_EARLIER) && defined(_MSC_VER) && (_MSC_VER < 1400)
 #define U_HAVE_MSVC_2003_OR_EARLIER
 #endif
 /*===========================================================================*/
 /** @{ Information about POSIX support                                       */
 /*===========================================================================*/
 #ifdef U_HAVE_NL_LANGINFO_CODESET
     /* Use the predefined value. */
 #elif U_PLATFORM_HAS_WIN32_API
 #   define U_HAVE_NL_LANGINFO_CODESET 0
 #else
 #   define U_HAVE_NL_LANGINFO_CODESET 1
 #endif
 #ifdef U_NL_LANGINFO_CODESET
     /* Use the predefined value. */
 #elif !U_HAVE_NL_LANGINFO_CODESET
 #   define U_NL_LANGINFO_CODESET -1
 #elif U_PLATFORM == U_PF_OS400
    /* not defined */
 #else
 #   define U_NL_LANGINFO_CODESET CODESET
 #endif
 #ifdef U_TZSET
     /* Use the predefined value. */
 #elif U_PLATFORM_USES_ONLY_WIN32_API
 #   define U_TZSET _tzset
 #elif U_PLATFORM == U_PF_OS400
    /* not defined */
 #else
 #   define U_TZSET tzset
 #endif
 #if defined(U_TIMEZONE) || defined(U_HAVE_TIMEZONE)
     /* Use the predefined value. */
 #elif U_PLATFORM == U_PF_ANDROID
 #   define U_TIMEZONE timezone
 #elif U_PLATFORM_IS_LINUX_BASED
 #   if !defined(__UCLIBC__)
     /* __timezone is only available in glibc */
 #       define U_TIMEZONE __timezone
 #   endif
 #elif U_PLATFORM_USES_ONLY_WIN32_API
 #   define U_TIMEZONE _timezone
 #elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__)
    /* not defined */
 #elif U_PLATFORM == U_PF_OS400
    /* not defined */
 #elif U_PLATFORM == U_PF_IPHONE
    /* not defined */
 #else
 #   define U_TIMEZONE timezone
 #endif
 #ifdef U_TZNAME
     /* Use the predefined value. */
 #elif U_PLATFORM_USES_ONLY_WIN32_API
 #   define U_TZNAME _tzname
 #elif U_PLATFORM == U_PF_OS400
    /* not defined */
 #else
 #   define U_TZNAME tzname
 #endif
 #ifdef U_HAVE_MMAP
     /* Use the predefined value. */
 #elif U_PLATFORM_HAS_WIN32_API
 #   define U_HAVE_MMAP 0
 #else
 #   define U_HAVE_MMAP 1
 #endif
 #ifdef U_HAVE_POPEN
     /* Use the predefined value. */
 #elif U_PLATFORM_USES_ONLY_WIN32_API
 #   define U_HAVE_POPEN 0
 #elif U_PLATFORM == U_PF_OS400
 #   define U_HAVE_POPEN 0
 #else
 #   define U_HAVE_POPEN 1
 #endif
 /**
  * \def U_HAVE_DIRENT_H
  * Defines whether dirent.h is available.
  * @internal
  */
 #ifdef U_HAVE_DIRENT_H
     /* Use the predefined value. */
 #elif U_PLATFORM_HAS_WIN32_API
 #   define U_HAVE_DIRENT_H 0
 #else
 #   define U_HAVE_DIRENT_H 1
 #endif
 /** @} */
 /*===========================================================================*/
 /** @{ GCC built in functions for atomic memory operations                   */
 /*===========================================================================*/
 /**
  * \def U_HAVE_GCC_ATOMICS
  * @internal
  */
 #ifdef U_HAVE_GCC_ATOMICS
     /* Use the predefined value. */
 #elif U_PLATFORM == U_PF_MINGW
     #define U_HAVE_GCC_ATOMICS 0
 #elif U_GCC_MAJOR_MINOR >= 404 || defined(__clang__)
     /* TODO: Intel icc and IBM xlc on AIX also support gcc atomics.  (Intel originated them.)
      *       Add them for these compilers.
      * Note: Clang sets __GNUC__ defines for version 4.2, so misses the 4.4 test here.
      */
 #   define U_HAVE_GCC_ATOMICS 1
 #else
 #   define U_HAVE_GCC_ATOMICS 0
 #endif
 /** @} */
 /**
  * \def U_HAVE_STD_ATOMICS
  * Defines whether the standard C++11 <atomic> is available.
  * ICU will use this when avialable,
  * otherwise will fall back to compiler or platform specific alternatives.
  * @internal
  */
 #ifdef U_HAVE_STD_ATOMICS
     /* Use the predefined value. */
 #elif !defined(__cplusplus) || __cplusplus<201103L
     /* Not C++11, disable use of atomics */
 #   define U_HAVE_STD_ATOMICS 0
 #elif __clang__ && __clang_major__==3 && __clang_minor__<=1
     /* Clang 3.1, has atomic variable initializer bug. */
 #   define U_HAVE_STD_ATOMICS 0
 #else
     /* U_HAVE_ATOMIC is typically set by an autoconf test of #include <atomic>  */
     /*   Can be set manually, or left undefined, on platforms without autoconf. */
 #   if defined(U_HAVE_ATOMIC) &&  U_HAVE_ATOMIC
 #      define U_HAVE_STD_ATOMICS 1
 #   else
 #      define U_HAVE_STD_ATOMICS 0
 #   endif
 #endif
 /*===========================================================================*/
 /** @{ Code alignment                                                        */
 /*===========================================================================*/
 /**
  * \def U_ALIGN_CODE
  * This is used to align code fragments to a specific byte boundary.
  * This is useful for getting consistent performance test results.
  * @internal
  */
 #ifdef U_ALIGN_CODE
     /* Use the predefined value. */
 #elif defined(_MSC_VER) && defined(_M_IX86) && !defined(_MANAGED)
 #   define U_ALIGN_CODE(boundarySize) __asm  align boundarySize
 #else
 #   define U_ALIGN_CODE(boundarySize)
 #endif
 /** @} */
 /*===========================================================================*/
 /** @{ Programs used by ICU code                                             */
 /*===========================================================================*/
 /**
  * \def U_MAKE_IS_NMAKE
  * Defines whether the "make" program is Windows nmake.
  */
 #ifdef U_MAKE_IS_NMAKE
     /* Use the predefined value. */
 #elif U_PLATFORM == U_PF_WINDOWS
 #   define U_MAKE_IS_NMAKE 1
 #else
 #   define U_MAKE_IS_NMAKE 0
 #endif
 /** @} */
 /*==========================================================================*/
 /* Platform utilities                                                       */
 /*==========================================================================*/
 /**
  * Platform utilities isolates the platform dependencies of the
  * libarary.  For each platform which this code is ported to, these
  * functions may have to be re-implemented.
  */
 /**
  * Floating point utility to determine if a double is Not a Number (NaN).
  * @internal
  */
 U_INTERNAL UBool   U_EXPORT2 uprv_isNaN(double d);
 /**
  * Floating point utility to determine if a double has an infinite value.
  * @internal
  */
 U_INTERNAL UBool   U_EXPORT2 uprv_isInfinite(double d);
 /**
  * Floating point utility to determine if a double has a positive infinite value.
  * @internal
  */
 U_INTERNAL UBool   U_EXPORT2 uprv_isPositiveInfinity(double d);
 /**
  * Floating point utility to determine if a double has a negative infinite value.
  * @internal
  */
 U_INTERNAL UBool   U_EXPORT2 uprv_isNegativeInfinity(double d);
 /**
  * Floating point utility that returns a Not a Number (NaN) value.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_getNaN(void);
 /**
  * Floating point utility that returns an infinite value.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_getInfinity(void);
 /**
  * Floating point utility to truncate a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_trunc(double d);
 /**
  * Floating point utility to calculate the floor of a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_floor(double d);
 /**
  * Floating point utility to calculate the ceiling of a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_ceil(double d);
 /**
  * Floating point utility to calculate the absolute value of a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_fabs(double d);
 /**
  * Floating point utility to calculate the fractional and integer parts of a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_modf(double d, double* pinteger);
 /**
  * Floating point utility to calculate the remainder of a double divided by another double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_fmod(double d, double y);
 /**
  * Floating point utility to calculate d to the power of exponent (d^exponent).
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_pow(double d, double exponent);
 /**
  * Floating point utility to calculate 10 to the power of exponent (10^exponent).
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_pow10(int32_t exponent);
 /**
  * Floating point utility to calculate the maximum value of two doubles.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_fmax(double d, double y);
 /**
  * Floating point utility to calculate the minimum value of two doubles.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_fmin(double d, double y);
 /**
  * Private utility to calculate the maximum value of two integers.
  * @internal
  */
 U_INTERNAL int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y);
 /**
  * Private utility to calculate the minimum value of two integers.
  * @internal
  */
 U_INTERNAL int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y);
 #if U_IS_BIG_ENDIAN
 #   define uprv_isNegative(number) (*((signed char *)&(number))<0)
 #else
 #   define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0)
 #endif
 /**
  * Return the largest positive number that can be represented by an integer
  * type of arbitrary bit length.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_maxMantissa(void);
 /**
  * Floating point utility to calculate the logarithm of a double.
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_log(double d);
 /**
  * Does common notion of rounding e.g. uprv_floor(x + 0.5);
  * @param x the double number
  * @return the rounded double
  * @internal
  */
 U_INTERNAL double  U_EXPORT2 uprv_round(double x);
 #if 0
 /**
  * Returns the number of digits after the decimal point in a double number x.
  *
  * @param x the double number
  * @return the number of digits after the decimal point in a double number x.
  * @internal
  */
 /*U_INTERNAL int32_t  U_EXPORT2 uprv_digitsAfterDecimal(double x);*/
 #endif
 #if !U_CHARSET_IS_UTF8
 /**
  * Please use ucnv_getDefaultName() instead.
  * Return the default codepage for this platform and locale.
  * This function can call setlocale() on Unix platforms. Please read the
  * platform documentation on setlocale() before calling this function.
  * @return the default codepage for this platform
  * @internal
  */
 U_INTERNAL const char*  U_EXPORT2 uprv_getDefaultCodepage(void);
 #endif
 /**
  * Please use uloc_getDefault() instead.
  * Return the default locale ID string by querying ths system, or
  *     zero if one cannot be found.
  * This function can call setlocale() on Unix platforms. Please read the
  * platform documentation on setlocale() before calling this function.
  * @return the default locale ID string
  * @internal
  */
 U_INTERNAL const char*  U_EXPORT2 uprv_getDefaultLocaleID(void);
 /**
  * Time zone utilities
  *
  * Wrappers for C runtime library functions relating to timezones.
  * The t_tzset() function (similar to tzset) uses the current setting
  * of the environment variable TZ to assign values to three global
  * variables: daylight, timezone, and tzname. These variables have the
  * following meanings, and are declared in &lt;time.h&gt;.
  *
  *   daylight   Nonzero if daylight-saving-time zone (DST) is specified
  *              in TZ; otherwise, 0. Default value is 1.
  *   timezone   Difference in seconds between coordinated universal
  *              time and local time. E.g., -28,800 for PST (GMT-8hrs)
  *   tzname(0)  Three-letter time-zone name derived from TZ environment
  *              variable. E.g., "PST".
  *   tzname(1)  Three-letter DST zone name derived from TZ environment
  *              variable.  E.g., "PDT". If DST zone is omitted from TZ,
  *              tzname(1) is an empty string.
  *
  * Notes: For example, to set the TZ environment variable to correspond
  * to the current time zone in Germany, you can use one of the
  * following statements:
  *
  *   set TZ=GST1GDT
  *   set TZ=GST+1GDT
  *
  * If the TZ value is not set, t_tzset() attempts to use the time zone
  * information specified by the operating system. Under Windows NT
  * and Windows 95, this information is specified in the Control Panel's
  * Date/Time application.
  * @internal
  */
 U_INTERNAL void     U_EXPORT2 uprv_tzset(void);
 /**
  * Difference in seconds between coordinated universal
  * time and local time. E.g., -28,800 for PST (GMT-8hrs)
  * @return the difference in seconds between coordinated universal time and local time.
  * @internal
  */
 U_INTERNAL int32_t  U_EXPORT2 uprv_timezone(void);
 /**
  *   tzname(0)  Three-letter time-zone name derived from TZ environment
  *              variable. E.g., "PST".
  *   tzname(1)  Three-letter DST zone name derived from TZ environment
  *              variable.  E.g., "PDT". If DST zone is omitted from TZ,
  *              tzname(1) is an empty string.
  * @internal
  */
 U_INTERNAL const char* U_EXPORT2 uprv_tzname(int n);
 /**
  * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
  * This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions.
  * @return the UTC time measured in milliseconds
  * @internal
  */
 U_INTERNAL UDate U_EXPORT2 uprv_getUTCtime(void);
 /**
  * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
  * This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that
  * exposes time to the end user.
  * @return the UTC time measured in milliseconds
  * @internal
  */
 U_INTERNAL UDate U_EXPORT2 uprv_getRawUTCtime(void);
 /**
  * Determine whether a pathname is absolute or not, as defined by the platform.
  * @param path Pathname to test
  * @return TRUE if the path is absolute
  * @internal (ICU 3.0)
  */
 U_INTERNAL UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path);
 /**
  * Use U_MAX_PTR instead of this function.
  * @param void pointer to test
  * @return the largest possible pointer greater than the base
  * @internal (ICU 3.8)
  */
 U_INTERNAL void * U_EXPORT2 uprv_maximumPtr(void *base);
 /**
  * Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer.
  * In fact, buffer sizes must not exceed 2GB so that the difference between
  * the buffer limit and the buffer start can be expressed in an int32_t.
  *
  * The definition of U_MAX_PTR must fulfill the following conditions:
  * - return the largest possible pointer greater than base
  * - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.)
  * - avoid wrapping around at high addresses
  * - make sure that the returned pointer is not farther from base than 0x7fffffff bytes
  *
  * @param base The beginning of a buffer to find the maximum offset from
  * @internal
  */
 #ifndef U_MAX_PTR
 #  if U_PLATFORM == U_PF_OS390 && !defined(_LP64)
     /* We have 31-bit pointers. */
 #    define U_MAX_PTR(base) ((void *)0x7fffffff)
 #  elif U_PLATFORM == U_PF_OS400
 #    define U_MAX_PTR(base) uprv_maximumPtr((void *)base)
 #  elif 0
     /*
      * For platforms where pointers are scalar values (which is normal, but unlike i5/OS)
      * but that do not define uintptr_t.
      *
      * However, this does not work on modern compilers:
      * The C++ standard does not define pointer overflow, and allows compilers to
      * assume that p+u>p for any pointer p and any integer u>0.
      * Thus, modern compilers optimize away the ">" comparison.
      * (See ICU tickets #7187 and #8096.)
      */
 #    define U_MAX_PTR(base) \
     ((void *)(((char *)(base)+0x7fffffffu) > (char *)(base) \
         ? ((char *)(base)+0x7fffffffu) \
         : (char *)-1))
 #  else
     /* Default version. C++ standard compliant for scalar pointers. */
 #    define U_MAX_PTR(base) \
     ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \
         ? ((uintptr_t)(base)+0x7fffffffu) \
         : (uintptr_t)-1))
 #  endif
 #endif
 /*  Dynamic Library Functions */
 typedef void (UVoidFunction)(void);
 #if U_ENABLE_DYLOAD
 /**
  * Load a library
  * @internal (ICU 4.4)
  */
 U_INTERNAL void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status);
 /**
  * Close a library
  * @internal (ICU 4.4)
  */
 U_INTERNAL void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status);
 /**
  * Extract a symbol from a library (function)
  * @internal (ICU 4.8)
  */
 U_INTERNAL UVoidFunction* U_EXPORT2 uprv_dlsym_func( void *lib, const char *symbolName, UErrorCode *status);
 /**
  * Extract a symbol from a library (function)
  * Not implemented, no clients.
  * @internal
  */
 /* U_INTERNAL void * U_EXPORT2 uprv_dlsym_data( void *lib, const char *symbolName, UErrorCode *status); */
 #endif
 /**
  * Define malloc and related functions
  * @internal
  */
 #if U_PLATFORM == U_PF_OS400
 # define uprv_default_malloc(x) _C_TS_malloc(x)
 # define uprv_default_realloc(x,y) _C_TS_realloc(x,y)
 # define uprv_default_free(x) _C_TS_free(x)
 /* also _C_TS_calloc(x) */
 #else
 /* C defaults */
 # define uprv_default_malloc(x) malloc(x)
 # define uprv_default_realloc(x,y) realloc(x,y)
 # define uprv_default_free(x) free(x)
 #endif
 #endif

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intl/icu/source/common/putilimp.h@129ffea94266 (annotated)

intl/icu/source/common/putilimp.h