1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ****************************************************************************** 5 * 6 * Copyright (C) 1997-2016, International Business Machines 7 * Corporation and others. All Rights Reserved. 8 * 9 ****************************************************************************** 10 * 11 * FILE NAME : putilimp.h 12 * 13 * Date Name Description 14 * 10/17/04 grhoten Move internal functions from putil.h to this file. 15 ****************************************************************************** 16 */ 17 18 #ifndef PUTILIMP_H 19 #define PUTILIMP_H 20 21 #include "unicode/utypes.h" 22 #include "unicode/putil.h" 23 24 /** 25 * \def U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 26 * Nearly all CPUs and compilers implement a right-shift of a signed integer 27 * as an Arithmetic Shift Right which copies the sign bit (the Most Significant Bit (MSB)) 28 * into the vacated bits (sign extension). 29 * For example, (int32_t)0xfff5fff3>>4 becomes 0xffff5fff and -1>>1=-1. 30 * 31 * This can be useful for storing a signed value in the upper bits 32 * and another bit field in the lower bits. 33 * The signed value can be retrieved by simple right-shifting. 34 * 35 * This is consistent with the Java language. 36 * 37 * However, the C standard allows compilers to implement a right-shift of a signed integer 38 * as a Logical Shift Right which copies a 0 into the vacated bits. 39 * For example, (int32_t)0xfff5fff3>>4 becomes 0x0fff5fff and -1>>1=0x7fffffff. 40 * 41 * Code that depends on the natural behavior should be guarded with this macro, 42 * with an alternate path for unusual platforms. 43 * @internal 44 */ 45 #ifdef U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 46 /* Use the predefined value. */ 47 #else 48 /* 49 * Nearly all CPUs & compilers implement a right-shift of a signed integer 50 * as an Arithmetic Shift Right (with sign extension). 51 */ 52 # define U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 1 53 #endif 54 55 /** Define this to 1 if your platform supports IEEE 754 floating point, 56 to 0 if it does not. */ 57 #ifndef IEEE_754 58 # define IEEE_754 1 59 #endif 60 61 /** 62 * uintptr_t is an optional part of the standard definitions in stdint.h. 63 * The opengroup.org documentation for stdint.h says 64 * "On XSI-conformant systems, the intptr_t and uintptr_t types are required; 65 * otherwise, they are optional." 66 * We assume that when uintptr_t is defined, UINTPTR_MAX is defined as well. 67 * 68 * Do not use ptrdiff_t since it is signed. size_t is unsigned. 69 */ 70 /* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */ 71 #if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390) 72 typedef size_t uintptr_t; 73 #endif 74 75 /*===========================================================================*/ 76 /** @{ Information about POSIX support */ 77 /*===========================================================================*/ 78 79 #ifdef U_HAVE_NL_LANGINFO_CODESET 80 /* Use the predefined value. */ 81 #elif U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_ANDROID || U_PLATFORM == U_PF_QNX 82 # define U_HAVE_NL_LANGINFO_CODESET 0 83 #else 84 # define U_HAVE_NL_LANGINFO_CODESET 1 85 #endif 86 87 #ifdef U_NL_LANGINFO_CODESET 88 /* Use the predefined value. */ 89 #elif !U_HAVE_NL_LANGINFO_CODESET 90 # define U_NL_LANGINFO_CODESET -1 91 #elif U_PLATFORM == U_PF_OS400 92 /* not defined */ 93 #else 94 # define U_NL_LANGINFO_CODESET CODESET 95 #endif 96 97 #ifdef U_TZSET 98 /* Use the predefined value. */ 99 #elif U_PLATFORM_USES_ONLY_WIN32_API 100 // UWP doesn't support tzset or environment variables for tz 101 #if U_PLATFORM_HAS_WINUWP_API == 0 102 # define U_TZSET _tzset 103 #endif 104 #elif U_PLATFORM == U_PF_OS400 105 /* not defined */ 106 #else 107 # define U_TZSET tzset 108 #endif 109 110 #if defined(U_TIMEZONE) || defined(U_HAVE_TIMEZONE) 111 /* Use the predefined value. */ 112 #elif U_PLATFORM == U_PF_ANDROID 113 # define U_TIMEZONE timezone 114 #elif defined(__UCLIBC__) 115 // uClibc does not have __timezone or _timezone. 116 #elif defined(_NEWLIB_VERSION) 117 # define U_TIMEZONE _timezone 118 #elif defined(__GLIBC__) 119 // glibc 120 # define U_TIMEZONE __timezone 121 #elif U_PLATFORM_IS_LINUX_BASED 122 // not defined 123 #elif U_PLATFORM_USES_ONLY_WIN32_API 124 # define U_TIMEZONE _timezone 125 #elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__) 126 /* not defined */ 127 #elif U_PLATFORM == U_PF_OS400 128 /* not defined */ 129 #elif U_PLATFORM == U_PF_IPHONE 130 /* not defined */ 131 #else 132 # define U_TIMEZONE timezone 133 #endif 134 135 #ifdef U_TZNAME 136 /* Use the predefined value. */ 137 #elif U_PLATFORM_USES_ONLY_WIN32_API 138 /* not usable on all windows platforms */ 139 #if U_PLATFORM_HAS_WINUWP_API == 0 140 # define U_TZNAME _tzname 141 #endif 142 #elif U_PLATFORM == U_PF_OS400 143 /* not defined */ 144 #else 145 # define U_TZNAME tzname 146 #endif 147 148 #ifdef U_HAVE_MMAP 149 /* Use the predefined value. */ 150 #elif U_PLATFORM_USES_ONLY_WIN32_API 151 # define U_HAVE_MMAP 0 152 #else 153 # define U_HAVE_MMAP 1 154 #endif 155 156 #ifdef U_HAVE_POPEN 157 /* Use the predefined value. */ 158 #elif U_PLATFORM_USES_ONLY_WIN32_API 159 # define U_HAVE_POPEN 0 160 #elif U_PLATFORM == U_PF_OS400 161 # define U_HAVE_POPEN 0 162 #else 163 # define U_HAVE_POPEN 1 164 #endif 165 166 /** 167 * \def U_HAVE_DIRENT_H 168 * Defines whether dirent.h is available. 169 * @internal 170 */ 171 #ifdef U_HAVE_DIRENT_H 172 /* Use the predefined value. */ 173 #elif U_PLATFORM_USES_ONLY_WIN32_API 174 # define U_HAVE_DIRENT_H 0 175 #else 176 # define U_HAVE_DIRENT_H 1 177 #endif 178 179 /** @} */ 180 181 /*===========================================================================*/ 182 /** @{ GCC built in functions for atomic memory operations */ 183 /*===========================================================================*/ 184 185 /** 186 * \def U_HAVE_GCC_ATOMICS 187 * @internal 188 */ 189 #ifdef U_HAVE_GCC_ATOMICS 190 /* Use the predefined value. */ 191 #elif U_PLATFORM == U_PF_MINGW 192 #define U_HAVE_GCC_ATOMICS 0 193 #elif U_GCC_MAJOR_MINOR >= 404 || defined(__clang__) 194 /* TODO: Intel icc and IBM xlc on AIX also support gcc atomics. (Intel originated them.) 195 * Add them for these compilers. 196 * Note: Clang sets __GNUC__ defines for version 4.2, so misses the 4.4 test here. 197 */ 198 # define U_HAVE_GCC_ATOMICS 1 199 #else 200 # define U_HAVE_GCC_ATOMICS 0 201 #endif 202 203 /** @} */ 204 205 /** 206 * \def U_HAVE_STD_ATOMICS 207 * Defines whether the standard C++11 <atomic> is available. 208 * ICU will use this when available, 209 * otherwise will fall back to compiler or platform specific alternatives. 210 * @internal 211 */ 212 #ifdef U_HAVE_STD_ATOMICS 213 /* Use the predefined value. */ 214 #elif U_CPLUSPLUS_VERSION < 11 215 /* Not C++11, disable use of atomics */ 216 # define U_HAVE_STD_ATOMICS 0 217 #elif __clang__ && __clang_major__==3 && __clang_minor__<=1 218 /* Clang 3.1, has atomic variable initializer bug. */ 219 # define U_HAVE_STD_ATOMICS 0 220 #else 221 /* U_HAVE_ATOMIC is typically set by an autoconf test of #include <atomic> */ 222 /* Can be set manually, or left undefined, on platforms without autoconf. */ 223 # if defined(U_HAVE_ATOMIC) && U_HAVE_ATOMIC 224 # define U_HAVE_STD_ATOMICS 1 225 # else 226 # define U_HAVE_STD_ATOMICS 0 227 # endif 228 #endif 229 230 231 /** 232 * \def U_HAVE_CLANG_ATOMICS 233 * Defines whether Clang c11 style built-in atomics are available. 234 * These are used in preference to gcc atomics when both are available. 235 */ 236 #ifdef U_HAVE_CLANG_ATOMICS 237 /* Use the predefined value. */ 238 #elif __has_builtin(__c11_atomic_load) && \ 239 __has_builtin(__c11_atomic_store) && \ 240 __has_builtin(__c11_atomic_fetch_add) && \ 241 __has_builtin(__c11_atomic_fetch_sub) 242 # define U_HAVE_CLANG_ATOMICS 1 243 #else 244 # define U_HAVE_CLANG_ATOMICS 0 245 #endif 246 247 /*===========================================================================*/ 248 /** @{ Programs used by ICU code */ 249 /*===========================================================================*/ 250 251 /** 252 * \def U_MAKE_IS_NMAKE 253 * Defines whether the "make" program is Windows nmake. 254 */ 255 #ifdef U_MAKE_IS_NMAKE 256 /* Use the predefined value. */ 257 #elif U_PLATFORM == U_PF_WINDOWS 258 # define U_MAKE_IS_NMAKE 1 259 #else 260 # define U_MAKE_IS_NMAKE 0 261 #endif 262 263 /** @} */ 264 265 /*==========================================================================*/ 266 /* Platform utilities */ 267 /*==========================================================================*/ 268 269 /** 270 * Platform utilities isolates the platform dependencies of the 271 * library. For each platform which this code is ported to, these 272 * functions may have to be re-implemented. 273 */ 274 275 /** 276 * Floating point utility to determine if a double is Not a Number (NaN). 277 * @internal 278 */ 279 U_INTERNAL UBool U_EXPORT2 uprv_isNaN(double d); 280 /** 281 * Floating point utility to determine if a double has an infinite value. 282 * @internal 283 */ 284 U_INTERNAL UBool U_EXPORT2 uprv_isInfinite(double d); 285 /** 286 * Floating point utility to determine if a double has a positive infinite value. 287 * @internal 288 */ 289 U_INTERNAL UBool U_EXPORT2 uprv_isPositiveInfinity(double d); 290 /** 291 * Floating point utility to determine if a double has a negative infinite value. 292 * @internal 293 */ 294 U_INTERNAL UBool U_EXPORT2 uprv_isNegativeInfinity(double d); 295 /** 296 * Floating point utility that returns a Not a Number (NaN) value. 297 * @internal 298 */ 299 U_INTERNAL double U_EXPORT2 uprv_getNaN(void); 300 /** 301 * Floating point utility that returns an infinite value. 302 * @internal 303 */ 304 U_INTERNAL double U_EXPORT2 uprv_getInfinity(void); 305 306 /** 307 * Floating point utility to truncate a double. 308 * @internal 309 */ 310 U_INTERNAL double U_EXPORT2 uprv_trunc(double d); 311 /** 312 * Floating point utility to calculate the floor of a double. 313 * @internal 314 */ 315 U_INTERNAL double U_EXPORT2 uprv_floor(double d); 316 /** 317 * Floating point utility to calculate the ceiling of a double. 318 * @internal 319 */ 320 U_INTERNAL double U_EXPORT2 uprv_ceil(double d); 321 /** 322 * Floating point utility to calculate the absolute value of a double. 323 * @internal 324 */ 325 U_INTERNAL double U_EXPORT2 uprv_fabs(double d); 326 /** 327 * Floating point utility to calculate the fractional and integer parts of a double. 328 * @internal 329 */ 330 U_INTERNAL double U_EXPORT2 uprv_modf(double d, double* pinteger); 331 /** 332 * Floating point utility to calculate the remainder of a double divided by another double. 333 * @internal 334 */ 335 U_INTERNAL double U_EXPORT2 uprv_fmod(double d, double y); 336 /** 337 * Floating point utility to calculate d to the power of exponent (d^exponent). 338 * @internal 339 */ 340 U_INTERNAL double U_EXPORT2 uprv_pow(double d, double exponent); 341 /** 342 * Floating point utility to calculate 10 to the power of exponent (10^exponent). 343 * @internal 344 */ 345 U_INTERNAL double U_EXPORT2 uprv_pow10(int32_t exponent); 346 /** 347 * Floating point utility to calculate the maximum value of two doubles. 348 * @internal 349 */ 350 U_INTERNAL double U_EXPORT2 uprv_fmax(double d, double y); 351 /** 352 * Floating point utility to calculate the minimum value of two doubles. 353 * @internal 354 */ 355 U_INTERNAL double U_EXPORT2 uprv_fmin(double d, double y); 356 /** 357 * Private utility to calculate the maximum value of two integers. 358 * @internal 359 */ 360 U_INTERNAL int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y); 361 /** 362 * Private utility to calculate the minimum value of two integers. 363 * @internal 364 */ 365 U_INTERNAL int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y); 366 367 #if U_IS_BIG_ENDIAN 368 # define uprv_isNegative(number) (*((signed char *)&(number))<0) 369 #else 370 # define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0) 371 #endif 372 373 /** 374 * Return the largest positive number that can be represented by an integer 375 * type of arbitrary bit length. 376 * @internal 377 */ 378 U_INTERNAL double U_EXPORT2 uprv_maxMantissa(void); 379 380 /** 381 * Floating point utility to calculate the logarithm of a double. 382 * @internal 383 */ 384 U_INTERNAL double U_EXPORT2 uprv_log(double d); 385 386 /** 387 * Does common notion of rounding e.g. uprv_floor(x + 0.5); 388 * @param x the double number 389 * @return the rounded double 390 * @internal 391 */ 392 U_INTERNAL double U_EXPORT2 uprv_round(double x); 393 394 #if 0 395 /** 396 * Returns the number of digits after the decimal point in a double number x. 397 * 398 * @param x the double number 399 * @return the number of digits after the decimal point in a double number x. 400 * @internal 401 */ 402 /*U_INTERNAL int32_t U_EXPORT2 uprv_digitsAfterDecimal(double x);*/ 403 #endif 404 405 #if !U_CHARSET_IS_UTF8 406 /** 407 * Please use ucnv_getDefaultName() instead. 408 * Return the default codepage for this platform and locale. 409 * This function can call setlocale() on Unix platforms. Please read the 410 * platform documentation on setlocale() before calling this function. 411 * @return the default codepage for this platform 412 * @internal 413 */ 414 U_INTERNAL const char* U_EXPORT2 uprv_getDefaultCodepage(void); 415 #endif 416 417 /** 418 * Please use uloc_getDefault() instead. 419 * Return the default locale ID string by querying the system, or 420 * zero if one cannot be found. 421 * This function can call setlocale() on Unix platforms. Please read the 422 * platform documentation on setlocale() before calling this function. 423 * @return the default locale ID string 424 * @internal 425 */ 426 U_INTERNAL const char* U_EXPORT2 uprv_getDefaultLocaleID(void); 427 428 /** 429 * Time zone utilities 430 * 431 * Wrappers for C runtime library functions relating to timezones. 432 * The t_tzset() function (similar to tzset) uses the current setting 433 * of the environment variable TZ to assign values to three global 434 * variables: daylight, timezone, and tzname. These variables have the 435 * following meanings, and are declared in <time.h>. 436 * 437 * daylight Nonzero if daylight-saving-time zone (DST) is specified 438 * in TZ; otherwise, 0. Default value is 1. 439 * timezone Difference in seconds between coordinated universal 440 * time and local time. E.g., -28,800 for PST (GMT-8hrs) 441 * tzname(0) Three-letter time-zone name derived from TZ environment 442 * variable. E.g., "PST". 443 * tzname(1) Three-letter DST zone name derived from TZ environment 444 * variable. E.g., "PDT". If DST zone is omitted from TZ, 445 * tzname(1) is an empty string. 446 * 447 * Notes: For example, to set the TZ environment variable to correspond 448 * to the current time zone in Germany, you can use one of the 449 * following statements: 450 * 451 * set TZ=GST1GDT 452 * set TZ=GST+1GDT 453 * 454 * If the TZ value is not set, t_tzset() attempts to use the time zone 455 * information specified by the operating system. Under Windows NT 456 * and Windows 95, this information is specified in the Control Panel's 457 * Date/Time application. 458 * @internal 459 */ 460 U_INTERNAL void U_EXPORT2 uprv_tzset(void); 461 462 /** 463 * Difference in seconds between coordinated universal 464 * time and local time. E.g., -28,800 for PST (GMT-8hrs) 465 * @return the difference in seconds between coordinated universal time and local time. 466 * @internal 467 */ 468 U_INTERNAL int32_t U_EXPORT2 uprv_timezone(void); 469 470 /** 471 * tzname(0) Three-letter time-zone name derived from TZ environment 472 * variable. E.g., "PST". 473 * tzname(1) Three-letter DST zone name derived from TZ environment 474 * variable. E.g., "PDT". If DST zone is omitted from TZ, 475 * tzname(1) is an empty string. 476 * @internal 477 */ 478 U_INTERNAL const char* U_EXPORT2 uprv_tzname(int n); 479 480 /** 481 * Reset the global tzname cache. 482 * @internal 483 */ 484 U_INTERNAL void uprv_tzname_clear_cache(); 485 486 /** 487 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 488 * This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions. 489 * @return the UTC time measured in milliseconds 490 * @internal 491 */ 492 U_INTERNAL UDate U_EXPORT2 uprv_getUTCtime(void); 493 494 /** 495 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 496 * This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that 497 * exposes time to the end user. 498 * @return the UTC time measured in milliseconds 499 * @internal 500 */ 501 U_INTERNAL UDate U_EXPORT2 uprv_getRawUTCtime(void); 502 503 /** 504 * Determine whether a pathname is absolute or not, as defined by the platform. 505 * @param path Pathname to test 506 * @return TRUE if the path is absolute 507 * @internal (ICU 3.0) 508 */ 509 U_INTERNAL UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path); 510 511 /** 512 * Use U_MAX_PTR instead of this function. 513 * @param void pointer to test 514 * @return the largest possible pointer greater than the base 515 * @internal (ICU 3.8) 516 */ 517 U_INTERNAL void * U_EXPORT2 uprv_maximumPtr(void *base); 518 519 /** 520 * Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer. 521 * In fact, buffer sizes must not exceed 2GB so that the difference between 522 * the buffer limit and the buffer start can be expressed in an int32_t. 523 * 524 * The definition of U_MAX_PTR must fulfill the following conditions: 525 * - return the largest possible pointer greater than base 526 * - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.) 527 * - avoid wrapping around at high addresses 528 * - make sure that the returned pointer is not farther from base than 0x7fffffff bytes 529 * 530 * @param base The beginning of a buffer to find the maximum offset from 531 * @internal 532 */ 533 #ifndef U_MAX_PTR 534 # if U_PLATFORM == U_PF_OS390 && !defined(_LP64) 535 /* We have 31-bit pointers. */ 536 # define U_MAX_PTR(base) ((void *)0x7fffffff) 537 # elif U_PLATFORM == U_PF_OS400 538 # define U_MAX_PTR(base) uprv_maximumPtr((void *)base) 539 # elif 0 540 /* 541 * For platforms where pointers are scalar values (which is normal, but unlike i5/OS) 542 * but that do not define uintptr_t. 543 * 544 * However, this does not work on modern compilers: 545 * The C++ standard does not define pointer overflow, and allows compilers to 546 * assume that p+u>p for any pointer p and any integer u>0. 547 * Thus, modern compilers optimize away the ">" comparison. 548 * (See ICU tickets #7187 and #8096.) 549 */ 550 # define U_MAX_PTR(base) \ 551 ((void *)(((char *)(base)+0x7fffffffu) > (char *)(base) \ 552 ? ((char *)(base)+0x7fffffffu) \ 553 : (char *)-1)) 554 # else 555 /* Default version. C++ standard compliant for scalar pointers. */ 556 # define U_MAX_PTR(base) \ 557 ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \ 558 ? ((uintptr_t)(base)+0x7fffffffu) \ 559 : (uintptr_t)-1)) 560 # endif 561 #endif 562 563 /* Dynamic Library Functions */ 564 565 typedef void (UVoidFunction)(void); 566 567 #if U_ENABLE_DYLOAD 568 /** 569 * Load a library 570 * @internal (ICU 4.4) 571 */ 572 U_INTERNAL void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status); 573 574 /** 575 * Close a library 576 * @internal (ICU 4.4) 577 */ 578 U_INTERNAL void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status); 579 580 /** 581 * Extract a symbol from a library (function) 582 * @internal (ICU 4.8) 583 */ 584 U_INTERNAL UVoidFunction* U_EXPORT2 uprv_dlsym_func( void *lib, const char *symbolName, UErrorCode *status); 585 586 /** 587 * Extract a symbol from a library (function) 588 * Not implemented, no clients. 589 * @internal 590 */ 591 /* U_INTERNAL void * U_EXPORT2 uprv_dlsym_data( void *lib, const char *symbolName, UErrorCode *status); */ 592 593 #endif 594 595 /** 596 * Define malloc and related functions 597 * @internal 598 */ 599 #if U_PLATFORM == U_PF_OS400 600 # define uprv_default_malloc(x) _C_TS_malloc(x) 601 # define uprv_default_realloc(x,y) _C_TS_realloc(x,y) 602 # define uprv_default_free(x) _C_TS_free(x) 603 /* also _C_TS_calloc(x) */ 604 #else 605 /* C defaults */ 606 # define uprv_default_malloc(x) malloc(x) 607 # define uprv_default_realloc(x,y) realloc(x,y) 608 # define uprv_default_free(x) free(x) 609 #endif 610 611 612 #endif 613
