1 /* 2 ****************************************************************************** 3 * 4 * Copyright (C) 1997-2015, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ****************************************************************************** 8 * 9 * FILE NAME : putilimp.h 10 * 11 * Date Name Description 12 * 10/17/04 grhoten Move internal functions from putil.h to this file. 13 ****************************************************************************** 14 */ 15 16 #ifndef PUTILIMP_H 17 #define PUTILIMP_H 18 19 #include "unicode/utypes.h" 20 #include "unicode/putil.h" 21 22 /** 23 * \def U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 24 * Nearly all CPUs and compilers implement a right-shift of a signed integer 25 * as an Arithmetic Shift Right which copies the sign bit (the Most Significant Bit (MSB)) 26 * into the vacated bits (sign extension). 27 * For example, (int32_t)0xfff5fff3>>4 becomes 0xffff5fff and -1>>1=-1. 28 * 29 * This can be useful for storing a signed value in the upper bits 30 * and another bit field in the lower bits. 31 * The signed value can be retrieved by simple right-shifting. 32 * 33 * This is consistent with the Java language. 34 * 35 * However, the C standard allows compilers to implement a right-shift of a signed integer 36 * as a Logical Shift Right which copies a 0 into the vacated bits. 37 * For example, (int32_t)0xfff5fff3>>4 becomes 0x0fff5fff and -1>>1=0x7fffffff. 38 * 39 * Code that depends on the natural behavior should be guarded with this macro, 40 * with an alternate path for unusual platforms. 41 * @internal 42 */ 43 #ifdef U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 44 /* Use the predefined value. */ 45 #else 46 /* 47 * Nearly all CPUs & compilers implement a right-shift of a signed integer 48 * as an Arithmetic Shift Right (with sign extension). 49 */ 50 # define U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 1 51 #endif 52 53 /** Define this to 1 if your platform supports IEEE 754 floating point, 54 to 0 if it does not. */ 55 #ifndef IEEE_754 56 # define IEEE_754 1 57 #endif 58 59 /** 60 * uintptr_t is an optional part of the standard definitions in stdint.h. 61 * The opengroup.org documentation for stdint.h says 62 * "On XSI-conformant systems, the intptr_t and uintptr_t types are required; 63 * otherwise, they are optional." 64 * We assume that when uintptr_t is defined, UINTPTR_MAX is defined as well. 65 * 66 * Do not use ptrdiff_t since it is signed. size_t is unsigned. 67 */ 68 /* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */ 69 #if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390) 70 typedef size_t uintptr_t; 71 #endif 72 73 /** 74 * \def U_HAVE_MSVC_2003_OR_EARLIER 75 * Flag for workaround of MSVC 2003 optimization bugs 76 * @internal 77 */ 78 #if !defined(U_HAVE_MSVC_2003_OR_EARLIER) && defined(_MSC_VER) && (_MSC_VER < 1400) 79 #define U_HAVE_MSVC_2003_OR_EARLIER 80 #endif 81 82 /*===========================================================================*/ 83 /** @{ Information about POSIX support */ 84 /*===========================================================================*/ 85 86 #ifdef U_HAVE_NL_LANGINFO_CODESET 87 /* Use the predefined value. */ 88 #elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_ANDROID || U_PLATFORM == U_PF_QNX 89 # define U_HAVE_NL_LANGINFO_CODESET 0 90 #else 91 # define U_HAVE_NL_LANGINFO_CODESET 1 92 #endif 93 94 #ifdef U_NL_LANGINFO_CODESET 95 /* Use the predefined value. */ 96 #elif !U_HAVE_NL_LANGINFO_CODESET 97 # define U_NL_LANGINFO_CODESET -1 98 #elif U_PLATFORM == U_PF_OS400 99 /* not defined */ 100 #else 101 # define U_NL_LANGINFO_CODESET CODESET 102 #endif 103 104 #ifdef U_TZSET 105 /* Use the predefined value. */ 106 #elif U_PLATFORM_USES_ONLY_WIN32_API 107 # define U_TZSET _tzset 108 #elif U_PLATFORM == U_PF_OS400 109 /* not defined */ 110 #else 111 # define U_TZSET tzset 112 #endif 113 114 #if defined(U_TIMEZONE) || defined(U_HAVE_TIMEZONE) 115 /* Use the predefined value. */ 116 #elif U_PLATFORM == U_PF_ANDROID 117 # define U_TIMEZONE timezone 118 #elif U_PLATFORM_IS_LINUX_BASED 119 # if defined(__UCLIBC__) 120 /* uClibc does not have __timezone or _timezone. */ 121 # elif defined(_NEWLIB_VERSION) 122 # define U_TIMEZONE _timezone 123 # elif defined(__GLIBC__) 124 /* glibc */ 125 # define U_TIMEZONE __timezone 126 # endif 127 #elif U_PLATFORM_USES_ONLY_WIN32_API 128 # define U_TIMEZONE _timezone 129 #elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__) 130 /* not defined */ 131 #elif U_PLATFORM == U_PF_OS400 132 /* not defined */ 133 #elif U_PLATFORM == U_PF_IPHONE 134 /* not defined */ 135 #else 136 # define U_TIMEZONE timezone 137 #endif 138 139 #ifdef U_TZNAME 140 /* Use the predefined value. */ 141 #elif U_PLATFORM_USES_ONLY_WIN32_API 142 # define U_TZNAME _tzname 143 #elif U_PLATFORM == U_PF_OS400 144 /* not defined */ 145 #else 146 # define U_TZNAME tzname 147 #endif 148 149 #ifdef U_HAVE_MMAP 150 /* Use the predefined value. */ 151 #elif U_PLATFORM_HAS_WIN32_API 152 # define U_HAVE_MMAP 0 153 #else 154 # define U_HAVE_MMAP 1 155 #endif 156 157 #ifdef U_HAVE_POPEN 158 /* Use the predefined value. */ 159 #elif U_PLATFORM_USES_ONLY_WIN32_API 160 # define U_HAVE_POPEN 0 161 #elif U_PLATFORM == U_PF_OS400 162 # define U_HAVE_POPEN 0 163 #else 164 # define U_HAVE_POPEN 1 165 #endif 166 167 /** 168 * \def U_HAVE_DIRENT_H 169 * Defines whether dirent.h is available. 170 * @internal 171 */ 172 #ifdef U_HAVE_DIRENT_H 173 /* Use the predefined value. */ 174 #elif U_PLATFORM_HAS_WIN32_API 175 # define U_HAVE_DIRENT_H 0 176 #else 177 # define U_HAVE_DIRENT_H 1 178 #endif 179 180 /** @} */ 181 182 /*===========================================================================*/ 183 /** @{ GCC built in functions for atomic memory operations */ 184 /*===========================================================================*/ 185 186 /** 187 * \def U_HAVE_GCC_ATOMICS 188 * @internal 189 */ 190 #ifdef U_HAVE_GCC_ATOMICS 191 /* Use the predefined value. */ 192 #elif U_PLATFORM == U_PF_MINGW 193 #define U_HAVE_GCC_ATOMICS 0 194 #elif U_GCC_MAJOR_MINOR >= 404 || defined(__clang__) 195 /* TODO: Intel icc and IBM xlc on AIX also support gcc atomics. (Intel originated them.) 196 * Add them for these compilers. 197 * Note: Clang sets __GNUC__ defines for version 4.2, so misses the 4.4 test here. 198 */ 199 # define U_HAVE_GCC_ATOMICS 1 200 #else 201 # define U_HAVE_GCC_ATOMICS 0 202 #endif 203 204 /** @} */ 205 206 /** 207 * \def U_HAVE_STD_ATOMICS 208 * Defines whether the standard C++11 <atomic> is available. 209 * ICU will use this when avialable, 210 * otherwise will fall back to compiler or platform specific alternatives. 211 * @internal 212 */ 213 #ifdef U_HAVE_STD_ATOMICS 214 /* Use the predefined value. */ 215 #elif U_CPLUSPLUS_VERSION < 11 216 /* Not C++11, disable use of atomics */ 217 # define U_HAVE_STD_ATOMICS 0 218 #elif __clang__ && __clang_major__==3 && __clang_minor__<=1 219 /* Clang 3.1, has atomic variable initializer bug. */ 220 # define U_HAVE_STD_ATOMICS 0 221 #else 222 /* U_HAVE_ATOMIC is typically set by an autoconf test of #include <atomic> */ 223 /* Can be set manually, or left undefined, on platforms without autoconf. */ 224 # if defined(U_HAVE_ATOMIC) && U_HAVE_ATOMIC 225 # define U_HAVE_STD_ATOMICS 1 226 # else 227 # define U_HAVE_STD_ATOMICS 0 228 # endif 229 #endif 230 231 232 /** 233 * \def U_HAVE_CLANG_ATOMICS 234 * Defines whether Clang c11 style built-in atomics are avaialable. 235 * These are used in preference to gcc atomics when both are available. 236 */ 237 #ifdef U_HAVE_CLANG_ATOMICS 238 /* Use the predefined value. */ 239 #elif __has_builtin(__c11_atomic_load) && \ 240 __has_builtin(__c11_atomic_store) && \ 241 __has_builtin(__c11_atomic_fetch_add) && \ 242 __has_builtin(__c11_atomic_fetch_sub) 243 # define U_HAVE_CLANG_ATOMICS 1 244 #else 245 # define U_HAVE_CLANG_ATOMICS 0 246 #endif 247 248 /*===========================================================================*/ 249 /** @{ Programs used by ICU code */ 250 /*===========================================================================*/ 251 252 /** 253 * \def U_MAKE_IS_NMAKE 254 * Defines whether the "make" program is Windows nmake. 255 */ 256 #ifdef U_MAKE_IS_NMAKE 257 /* Use the predefined value. */ 258 #elif U_PLATFORM == U_PF_WINDOWS 259 # define U_MAKE_IS_NMAKE 1 260 #else 261 # define U_MAKE_IS_NMAKE 0 262 #endif 263 264 /** @} */ 265 266 /*==========================================================================*/ 267 /* Platform utilities */ 268 /*==========================================================================*/ 269 270 /** 271 * Platform utilities isolates the platform dependencies of the 272 * libarary. For each platform which this code is ported to, these 273 * functions may have to be re-implemented. 274 */ 275 276 /** 277 * Floating point utility to determine if a double is Not a Number (NaN). 278 * @internal 279 */ 280 U_INTERNAL UBool U_EXPORT2 uprv_isNaN(double d); 281 /** 282 * Floating point utility to determine if a double has an infinite value. 283 * @internal 284 */ 285 U_INTERNAL UBool U_EXPORT2 uprv_isInfinite(double d); 286 /** 287 * Floating point utility to determine if a double has a positive infinite value. 288 * @internal 289 */ 290 U_INTERNAL UBool U_EXPORT2 uprv_isPositiveInfinity(double d); 291 /** 292 * Floating point utility to determine if a double has a negative infinite value. 293 * @internal 294 */ 295 U_INTERNAL UBool U_EXPORT2 uprv_isNegativeInfinity(double d); 296 /** 297 * Floating point utility that returns a Not a Number (NaN) value. 298 * @internal 299 */ 300 U_INTERNAL double U_EXPORT2 uprv_getNaN(void); 301 /** 302 * Floating point utility that returns an infinite value. 303 * @internal 304 */ 305 U_INTERNAL double U_EXPORT2 uprv_getInfinity(void); 306 307 /** 308 * Floating point utility to truncate a double. 309 * @internal 310 */ 311 U_INTERNAL double U_EXPORT2 uprv_trunc(double d); 312 /** 313 * Floating point utility to calculate the floor of a double. 314 * @internal 315 */ 316 U_INTERNAL double U_EXPORT2 uprv_floor(double d); 317 /** 318 * Floating point utility to calculate the ceiling of a double. 319 * @internal 320 */ 321 U_INTERNAL double U_EXPORT2 uprv_ceil(double d); 322 /** 323 * Floating point utility to calculate the absolute value of a double. 324 * @internal 325 */ 326 U_INTERNAL double U_EXPORT2 uprv_fabs(double d); 327 /** 328 * Floating point utility to calculate the fractional and integer parts of a double. 329 * @internal 330 */ 331 U_INTERNAL double U_EXPORT2 uprv_modf(double d, double* pinteger); 332 /** 333 * Floating point utility to calculate the remainder of a double divided by another double. 334 * @internal 335 */ 336 U_INTERNAL double U_EXPORT2 uprv_fmod(double d, double y); 337 /** 338 * Floating point utility to calculate d to the power of exponent (d^exponent). 339 * @internal 340 */ 341 U_INTERNAL double U_EXPORT2 uprv_pow(double d, double exponent); 342 /** 343 * Floating point utility to calculate 10 to the power of exponent (10^exponent). 344 * @internal 345 */ 346 U_INTERNAL double U_EXPORT2 uprv_pow10(int32_t exponent); 347 /** 348 * Floating point utility to calculate the maximum value of two doubles. 349 * @internal 350 */ 351 U_INTERNAL double U_EXPORT2 uprv_fmax(double d, double y); 352 /** 353 * Floating point utility to calculate the minimum value of two doubles. 354 * @internal 355 */ 356 U_INTERNAL double U_EXPORT2 uprv_fmin(double d, double y); 357 /** 358 * Private utility to calculate the maximum value of two integers. 359 * @internal 360 */ 361 U_INTERNAL int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y); 362 /** 363 * Private utility to calculate the minimum value of two integers. 364 * @internal 365 */ 366 U_INTERNAL int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y); 367 368 #if U_IS_BIG_ENDIAN 369 # define uprv_isNegative(number) (*((signed char *)&(number))<0) 370 #else 371 # define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0) 372 #endif 373 374 /** 375 * Return the largest positive number that can be represented by an integer 376 * type of arbitrary bit length. 377 * @internal 378 */ 379 U_INTERNAL double U_EXPORT2 uprv_maxMantissa(void); 380 381 /** 382 * Floating point utility to calculate the logarithm of a double. 383 * @internal 384 */ 385 U_INTERNAL double U_EXPORT2 uprv_log(double d); 386 387 /** 388 * Does common notion of rounding e.g. uprv_floor(x + 0.5); 389 * @param x the double number 390 * @return the rounded double 391 * @internal 392 */ 393 U_INTERNAL double U_EXPORT2 uprv_round(double x); 394 395 #if 0 396 /** 397 * Returns the number of digits after the decimal point in a double number x. 398 * 399 * @param x the double number 400 * @return the number of digits after the decimal point in a double number x. 401 * @internal 402 */ 403 /*U_INTERNAL int32_t U_EXPORT2 uprv_digitsAfterDecimal(double x);*/ 404 #endif 405 406 #if !U_CHARSET_IS_UTF8 407 /** 408 * Please use ucnv_getDefaultName() instead. 409 * Return the default codepage for this platform and locale. 410 * This function can call setlocale() on Unix platforms. Please read the 411 * platform documentation on setlocale() before calling this function. 412 * @return the default codepage for this platform 413 * @internal 414 */ 415 U_INTERNAL const char* U_EXPORT2 uprv_getDefaultCodepage(void); 416 #endif 417 418 /** 419 * Please use uloc_getDefault() instead. 420 * Return the default locale ID string by querying ths system, or 421 * zero if one cannot be found. 422 * This function can call setlocale() on Unix platforms. Please read the 423 * platform documentation on setlocale() before calling this function. 424 * @return the default locale ID string 425 * @internal 426 */ 427 U_INTERNAL const char* U_EXPORT2 uprv_getDefaultLocaleID(void); 428 429 /** 430 * Time zone utilities 431 * 432 * Wrappers for C runtime library functions relating to timezones. 433 * The t_tzset() function (similar to tzset) uses the current setting 434 * of the environment variable TZ to assign values to three global 435 * variables: daylight, timezone, and tzname. These variables have the 436 * following meanings, and are declared in <time.h>. 437 * 438 * daylight Nonzero if daylight-saving-time zone (DST) is specified 439 * in TZ; otherwise, 0. Default value is 1. 440 * timezone Difference in seconds between coordinated universal 441 * time and local time. E.g., -28,800 for PST (GMT-8hrs) 442 * tzname(0) Three-letter time-zone name derived from TZ environment 443 * variable. E.g., "PST". 444 * tzname(1) Three-letter DST zone name derived from TZ environment 445 * variable. E.g., "PDT". If DST zone is omitted from TZ, 446 * tzname(1) is an empty string. 447 * 448 * Notes: For example, to set the TZ environment variable to correspond 449 * to the current time zone in Germany, you can use one of the 450 * following statements: 451 * 452 * set TZ=GST1GDT 453 * set TZ=GST+1GDT 454 * 455 * If the TZ value is not set, t_tzset() attempts to use the time zone 456 * information specified by the operating system. Under Windows NT 457 * and Windows 95, this information is specified in the Control Panel's 458 * Date/Time application. 459 * @internal 460 */ 461 U_INTERNAL void U_EXPORT2 uprv_tzset(void); 462 463 /** 464 * Difference in seconds between coordinated universal 465 * time and local time. E.g., -28,800 for PST (GMT-8hrs) 466 * @return the difference in seconds between coordinated universal time and local time. 467 * @internal 468 */ 469 U_INTERNAL int32_t U_EXPORT2 uprv_timezone(void); 470 471 /** 472 * tzname(0) Three-letter time-zone name derived from TZ environment 473 * variable. E.g., "PST". 474 * tzname(1) Three-letter DST zone name derived from TZ environment 475 * variable. E.g., "PDT". If DST zone is omitted from TZ, 476 * tzname(1) is an empty string. 477 * @internal 478 */ 479 U_INTERNAL const char* U_EXPORT2 uprv_tzname(int n); 480 481 /** 482 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 483 * This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions. 484 * @return the UTC time measured in milliseconds 485 * @internal 486 */ 487 U_INTERNAL UDate U_EXPORT2 uprv_getUTCtime(void); 488 489 /** 490 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 491 * This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that 492 * exposes time to the end user. 493 * @return the UTC time measured in milliseconds 494 * @internal 495 */ 496 U_INTERNAL UDate U_EXPORT2 uprv_getRawUTCtime(void); 497 498 /** 499 * Determine whether a pathname is absolute or not, as defined by the platform. 500 * @param path Pathname to test 501 * @return TRUE if the path is absolute 502 * @internal (ICU 3.0) 503 */ 504 U_INTERNAL UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path); 505 506 /** 507 * Use U_MAX_PTR instead of this function. 508 * @param void pointer to test 509 * @return the largest possible pointer greater than the base 510 * @internal (ICU 3.8) 511 */ 512 U_INTERNAL void * U_EXPORT2 uprv_maximumPtr(void *base); 513 514 /** 515 * Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer. 516 * In fact, buffer sizes must not exceed 2GB so that the difference between 517 * the buffer limit and the buffer start can be expressed in an int32_t. 518 * 519 * The definition of U_MAX_PTR must fulfill the following conditions: 520 * - return the largest possible pointer greater than base 521 * - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.) 522 * - avoid wrapping around at high addresses 523 * - make sure that the returned pointer is not farther from base than 0x7fffffff bytes 524 * 525 * @param base The beginning of a buffer to find the maximum offset from 526 * @internal 527 */ 528 #ifndef U_MAX_PTR 529 # if U_PLATFORM == U_PF_OS390 && !defined(_LP64) 530 /* We have 31-bit pointers. */ 531 # define U_MAX_PTR(base) ((void *)0x7fffffff) 532 # elif U_PLATFORM == U_PF_OS400 533 # define U_MAX_PTR(base) uprv_maximumPtr((void *)base) 534 # elif 0 535 /* 536 * For platforms where pointers are scalar values (which is normal, but unlike i5/OS) 537 * but that do not define uintptr_t. 538 * 539 * However, this does not work on modern compilers: 540 * The C++ standard does not define pointer overflow, and allows compilers to 541 * assume that p+u>p for any pointer p and any integer u>0. 542 * Thus, modern compilers optimize away the ">" comparison. 543 * (See ICU tickets #7187 and #8096.) 544 */ 545 # define U_MAX_PTR(base) \ 546 ((void *)(((char *)(base)+0x7fffffffu) > (char *)(base) \ 547 ? ((char *)(base)+0x7fffffffu) \ 548 : (char *)-1)) 549 # else 550 /* Default version. C++ standard compliant for scalar pointers. */ 551 # define U_MAX_PTR(base) \ 552 ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \ 553 ? ((uintptr_t)(base)+0x7fffffffu) \ 554 : (uintptr_t)-1)) 555 # endif 556 #endif 557 558 /* Dynamic Library Functions */ 559 560 typedef void (UVoidFunction)(void); 561 562 #if U_ENABLE_DYLOAD 563 /** 564 * Load a library 565 * @internal (ICU 4.4) 566 */ 567 U_INTERNAL void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status); 568 569 /** 570 * Close a library 571 * @internal (ICU 4.4) 572 */ 573 U_INTERNAL void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status); 574 575 /** 576 * Extract a symbol from a library (function) 577 * @internal (ICU 4.8) 578 */ 579 U_INTERNAL UVoidFunction* U_EXPORT2 uprv_dlsym_func( void *lib, const char *symbolName, UErrorCode *status); 580 581 /** 582 * Extract a symbol from a library (function) 583 * Not implemented, no clients. 584 * @internal 585 */ 586 /* U_INTERNAL void * U_EXPORT2 uprv_dlsym_data( void *lib, const char *symbolName, UErrorCode *status); */ 587 588 #endif 589 590 /** 591 * Define malloc and related functions 592 * @internal 593 */ 594 #if U_PLATFORM == U_PF_OS400 595 # define uprv_default_malloc(x) _C_TS_malloc(x) 596 # define uprv_default_realloc(x,y) _C_TS_realloc(x,y) 597 # define uprv_default_free(x) _C_TS_free(x) 598 /* also _C_TS_calloc(x) */ 599 #else 600 /* C defaults */ 601 # define uprv_default_malloc(x) malloc(x) 602 # define uprv_default_realloc(x,y) realloc(x,y) 603 # define uprv_default_free(x) free(x) 604 #endif 605 606 607 #endif 608