The Tor Browser / annotate

intl/icu/source/i18n/decContext.h@6474c204b198 (annotated)

intl/icu/source/i18n/decContext.h

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0 1 /* ------------------------------------------------------------------ */
michael@0 2 /* Decimal Context module header */
michael@0 3 /* ------------------------------------------------------------------ */
michael@0 4 /* Copyright (c) IBM Corporation, 2000-2011. All rights reserved. */
michael@0 5 /* */
michael@0 6 /* This software is made available under the terms of the */
michael@0 7 /* ICU License -- ICU 1.8.1 and later. */
michael@0 8 /* */
michael@0 9 /* The description and User's Guide ("The decNumber C Library") for */
michael@0 10 /* this software is called decNumber.pdf. This document is */
michael@0 11 /* available, together with arithmetic and format specifications, */
michael@0 12 /* testcases, and Web links, on the General Decimal Arithmetic page. */
michael@0 13 /* */
michael@0 14 /* Please send comments, suggestions, and corrections to the author: */
michael@0 15 /* mfc@uk.ibm.com */
michael@0 16 /* Mike Cowlishaw, IBM Fellow */
michael@0 17 /* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
michael@0 18 /* ------------------------------------------------------------------ */
michael@0 19
michael@0 20 /* Modified version, for use from within ICU.
michael@0 21 * Renamed public functions, to avoid an unwanted export of the
michael@0 22 * standard names from the ICU library.
michael@0 23 *
michael@0 24 * Use ICU's uprv_malloc() and uprv_free()
michael@0 25 *
michael@0 26 * Revert comment syntax to plain C
michael@0 27 *
michael@0 28 * Remove a few compiler warnings.
michael@0 29 */
michael@0 30 #include "unicode/utypes.h"
michael@0 31 #include "putilimp.h"
michael@0 32
michael@0 33 /* */
michael@0 34 /* Context variables must always have valid values: */
michael@0 35 /* */
michael@0 36 /* status -- [any bits may be cleared, but not set, by user] */
michael@0 37 /* round -- must be one of the enumerated rounding modes */
michael@0 38 /* */
michael@0 39 /* The following variables are implied for fixed size formats (i.e., */
michael@0 40 /* they are ignored) but should still be set correctly in case used */
michael@0 41 /* with decNumber functions: */
michael@0 42 /* */
michael@0 43 /* clamp -- must be either 0 or 1 */
michael@0 44 /* digits -- must be in the range 1 through 999999999 */
michael@0 45 /* emax -- must be in the range 0 through 999999999 */
michael@0 46 /* emin -- must be in the range 0 through -999999999 */
michael@0 47 /* extended -- must be either 0 or 1 [present only if DECSUBSET] */
michael@0 48 /* traps -- only defined bits may be set */
michael@0 49 /* */
michael@0 50 /* ------------------------------------------------------------------ */
michael@0 51
michael@0 52 #if !defined(DECCONTEXT)
michael@0 53 #define DECCONTEXT
michael@0 54 #define DECCNAME "decContext" /* Short name */
michael@0 55 #define DECCFULLNAME "Decimal Context Descriptor" /* Verbose name */
michael@0 56 #define DECCAUTHOR "Mike Cowlishaw" /* Who to blame */
michael@0 57
michael@0 58 #if !defined(int32_t)
michael@0 59 /* #include <stdint.h> */ /* C99 standard integers */
michael@0 60 #endif
michael@0 61 #include <stdio.h> /* for printf, etc. */
michael@0 62 #include <signal.h> /* for traps */
michael@0 63
michael@0 64 /* Extended flags setting -- set this to 0 to use only IEEE flags */
michael@0 65 #if !defined(DECEXTFLAG)
michael@0 66 #define DECEXTFLAG 1 /* 1=enable extended flags */
michael@0 67 #endif
michael@0 68
michael@0 69 /* Conditional code flag -- set this to 0 for best performance */
michael@0 70 #if !defined(DECSUBSET)
michael@0 71 #define DECSUBSET 0 /* 1=enable subset arithmetic */
michael@0 72 #endif
michael@0 73
michael@0 74 /* Context for operations, with associated constants */
michael@0 75 enum rounding {
michael@0 76 DEC_ROUND_CEILING, /* round towards +infinity */
michael@0 77 DEC_ROUND_UP, /* round away from 0 */
michael@0 78 DEC_ROUND_HALF_UP, /* 0.5 rounds up */
michael@0 79 DEC_ROUND_HALF_EVEN, /* 0.5 rounds to nearest even */
michael@0 80 DEC_ROUND_HALF_DOWN, /* 0.5 rounds down */
michael@0 81 DEC_ROUND_DOWN, /* round towards 0 (truncate) */
michael@0 82 DEC_ROUND_FLOOR, /* round towards -infinity */
michael@0 83 DEC_ROUND_05UP, /* round for reround */
michael@0 84 DEC_ROUND_MAX /* enum must be less than this */
michael@0 85 };
michael@0 86 #define DEC_ROUND_DEFAULT DEC_ROUND_HALF_EVEN;
michael@0 87
michael@0 88 typedef struct {
michael@0 89 int32_t digits; /* working precision */
michael@0 90 int32_t emax; /* maximum positive exponent */
michael@0 91 int32_t emin; /* minimum negative exponent */
michael@0 92 enum rounding round; /* rounding mode */
michael@0 93 uint32_t traps; /* trap-enabler flags */
michael@0 94 uint32_t status; /* status flags */
michael@0 95 uint8_t clamp; /* flag: apply IEEE exponent clamp */
michael@0 96 #if DECSUBSET
michael@0 97 uint8_t extended; /* flag: special-values allowed */
michael@0 98 #endif
michael@0 99 } decContext;
michael@0 100
michael@0 101 /* Maxima and Minima for context settings */
michael@0 102 #define DEC_MAX_DIGITS 999999999
michael@0 103 #define DEC_MIN_DIGITS 1
michael@0 104 #define DEC_MAX_EMAX 999999999
michael@0 105 #define DEC_MIN_EMAX 0
michael@0 106 #define DEC_MAX_EMIN 0
michael@0 107 #define DEC_MIN_EMIN -999999999
michael@0 108 #define DEC_MAX_MATH 999999 /* max emax, etc., for math funcs. */
michael@0 109
michael@0 110 /* Classifications for decimal numbers, aligned with 754 (note that */
michael@0 111 /* 'normal' and 'subnormal' are meaningful only with a decContext */
michael@0 112 /* or a fixed size format). */
michael@0 113 enum decClass {
michael@0 114 DEC_CLASS_SNAN,
michael@0 115 DEC_CLASS_QNAN,
michael@0 116 DEC_CLASS_NEG_INF,
michael@0 117 DEC_CLASS_NEG_NORMAL,
michael@0 118 DEC_CLASS_NEG_SUBNORMAL,
michael@0 119 DEC_CLASS_NEG_ZERO,
michael@0 120 DEC_CLASS_POS_ZERO,
michael@0 121 DEC_CLASS_POS_SUBNORMAL,
michael@0 122 DEC_CLASS_POS_NORMAL,
michael@0 123 DEC_CLASS_POS_INF
michael@0 124 };
michael@0 125 /* Strings for the decClasses */
michael@0 126 #define DEC_ClassString_SN "sNaN"
michael@0 127 #define DEC_ClassString_QN "NaN"
michael@0 128 #define DEC_ClassString_NI "-Infinity"
michael@0 129 #define DEC_ClassString_NN "-Normal"
michael@0 130 #define DEC_ClassString_NS "-Subnormal"
michael@0 131 #define DEC_ClassString_NZ "-Zero"
michael@0 132 #define DEC_ClassString_PZ "+Zero"
michael@0 133 #define DEC_ClassString_PS "+Subnormal"
michael@0 134 #define DEC_ClassString_PN "+Normal"
michael@0 135 #define DEC_ClassString_PI "+Infinity"
michael@0 136 #define DEC_ClassString_UN "Invalid"
michael@0 137
michael@0 138 /* Trap-enabler and Status flags (exceptional conditions), and */
michael@0 139 /* their names. The top byte is reserved for internal use */
michael@0 140 #if DECEXTFLAG
michael@0 141 /* Extended flags */
michael@0 142 #define DEC_Conversion_syntax 0x00000001
michael@0 143 #define DEC_Division_by_zero 0x00000002
michael@0 144 #define DEC_Division_impossible 0x00000004
michael@0 145 #define DEC_Division_undefined 0x00000008
michael@0 146 #define DEC_Insufficient_storage 0x00000010 /* [when malloc fails] */
michael@0 147 #define DEC_Inexact 0x00000020
michael@0 148 #define DEC_Invalid_context 0x00000040
michael@0 149 #define DEC_Invalid_operation 0x00000080
michael@0 150 #if DECSUBSET
michael@0 151 #define DEC_Lost_digits 0x00000100
michael@0 152 #endif
michael@0 153 #define DEC_Overflow 0x00000200
michael@0 154 #define DEC_Clamped 0x00000400
michael@0 155 #define DEC_Rounded 0x00000800
michael@0 156 #define DEC_Subnormal 0x00001000
michael@0 157 #define DEC_Underflow 0x00002000
michael@0 158 #else
michael@0 159 /* IEEE flags only */
michael@0 160 #define DEC_Conversion_syntax 0x00000010
michael@0 161 #define DEC_Division_by_zero 0x00000002
michael@0 162 #define DEC_Division_impossible 0x00000010
michael@0 163 #define DEC_Division_undefined 0x00000010
michael@0 164 #define DEC_Insufficient_storage 0x00000010 /* [when malloc fails] */
michael@0 165 #define DEC_Inexact 0x00000001
michael@0 166 #define DEC_Invalid_context 0x00000010
michael@0 167 #define DEC_Invalid_operation 0x00000010
michael@0 168 #if DECSUBSET
michael@0 169 #define DEC_Lost_digits 0x00000000
michael@0 170 #endif
michael@0 171 #define DEC_Overflow 0x00000008
michael@0 172 #define DEC_Clamped 0x00000000
michael@0 173 #define DEC_Rounded 0x00000000
michael@0 174 #define DEC_Subnormal 0x00000000
michael@0 175 #define DEC_Underflow 0x00000004
michael@0 176 #endif
michael@0 177
michael@0 178 /* IEEE 754 groupings for the flags */
michael@0 179 /* [DEC_Clamped, DEC_Lost_digits, DEC_Rounded, and DEC_Subnormal */
michael@0 180 /* are not in IEEE 754] */
michael@0 181 #define DEC_IEEE_754_Division_by_zero (DEC_Division_by_zero)
michael@0 182 #if DECSUBSET
michael@0 183 #define DEC_IEEE_754_Inexact (DEC_Inexact | DEC_Lost_digits)
michael@0 184 #else
michael@0 185 #define DEC_IEEE_754_Inexact (DEC_Inexact)
michael@0 186 #endif
michael@0 187 #define DEC_IEEE_754_Invalid_operation (DEC_Conversion_syntax | \
michael@0 188 DEC_Division_impossible | \
michael@0 189 DEC_Division_undefined | \
michael@0 190 DEC_Insufficient_storage | \
michael@0 191 DEC_Invalid_context | \
michael@0 192 DEC_Invalid_operation)
michael@0 193 #define DEC_IEEE_754_Overflow (DEC_Overflow)
michael@0 194 #define DEC_IEEE_754_Underflow (DEC_Underflow)
michael@0 195
michael@0 196 /* flags which are normally errors (result is qNaN, infinite, or 0) */
michael@0 197 #define DEC_Errors (DEC_IEEE_754_Division_by_zero | \
michael@0 198 DEC_IEEE_754_Invalid_operation | \
michael@0 199 DEC_IEEE_754_Overflow | DEC_IEEE_754_Underflow)
michael@0 200 /* flags which cause a result to become qNaN */
michael@0 201 #define DEC_NaNs DEC_IEEE_754_Invalid_operation
michael@0 202
michael@0 203 /* flags which are normally for information only (finite results) */
michael@0 204 #if DECSUBSET
michael@0 205 #define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact \
michael@0 206 | DEC_Lost_digits)
michael@0 207 #else
michael@0 208 #define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact)
michael@0 209 #endif
michael@0 210
michael@0 211 /* IEEE 854 names (for compatibility with older decNumber versions) */
michael@0 212 #define DEC_IEEE_854_Division_by_zero DEC_IEEE_754_Division_by_zero
michael@0 213 #define DEC_IEEE_854_Inexact DEC_IEEE_754_Inexact
michael@0 214 #define DEC_IEEE_854_Invalid_operation DEC_IEEE_754_Invalid_operation
michael@0 215 #define DEC_IEEE_854_Overflow DEC_IEEE_754_Overflow
michael@0 216 #define DEC_IEEE_854_Underflow DEC_IEEE_754_Underflow
michael@0 217
michael@0 218 /* Name strings for the exceptional conditions */
michael@0 219 #define DEC_Condition_CS "Conversion syntax"
michael@0 220 #define DEC_Condition_DZ "Division by zero"
michael@0 221 #define DEC_Condition_DI "Division impossible"
michael@0 222 #define DEC_Condition_DU "Division undefined"
michael@0 223 #define DEC_Condition_IE "Inexact"
michael@0 224 #define DEC_Condition_IS "Insufficient storage"
michael@0 225 #define DEC_Condition_IC "Invalid context"
michael@0 226 #define DEC_Condition_IO "Invalid operation"
michael@0 227 #if DECSUBSET
michael@0 228 #define DEC_Condition_LD "Lost digits"
michael@0 229 #endif
michael@0 230 #define DEC_Condition_OV "Overflow"
michael@0 231 #define DEC_Condition_PA "Clamped"
michael@0 232 #define DEC_Condition_RO "Rounded"
michael@0 233 #define DEC_Condition_SU "Subnormal"
michael@0 234 #define DEC_Condition_UN "Underflow"
michael@0 235 #define DEC_Condition_ZE "No status"
michael@0 236 #define DEC_Condition_MU "Multiple status"
michael@0 237 #define DEC_Condition_Length 21 /* length of the longest string, */
michael@0 238 /* including terminator */
michael@0 239
michael@0 240 /* Initialization descriptors, used by decContextDefault */
michael@0 241 #define DEC_INIT_BASE 0
michael@0 242 #define DEC_INIT_DECIMAL32 32
michael@0 243 #define DEC_INIT_DECIMAL64 64
michael@0 244 #define DEC_INIT_DECIMAL128 128
michael@0 245 /* Synonyms */
michael@0 246 #define DEC_INIT_DECSINGLE DEC_INIT_DECIMAL32
michael@0 247 #define DEC_INIT_DECDOUBLE DEC_INIT_DECIMAL64
michael@0 248 #define DEC_INIT_DECQUAD DEC_INIT_DECIMAL128
michael@0 249
michael@0 250 /* decContext routines */
michael@0 251 U_INTERNAL decContext * U_EXPORT2 uprv_decContextClearStatus(decContext *, uint32_t);
michael@0 252 U_INTERNAL decContext * U_EXPORT2 uprv_decContextDefault(decContext *, int32_t);
michael@0 253 U_INTERNAL enum rounding U_EXPORT2 uprv_decContextGetRounding(decContext *);
michael@0 254 U_INTERNAL uint32_t U_EXPORT2 uprv_decContextGetStatus(decContext *);
michael@0 255 U_INTERNAL decContext * U_EXPORT2 uprv_decContextRestoreStatus(decContext *, uint32_t, uint32_t);
michael@0 256 U_INTERNAL uint32_t U_EXPORT2 uprv_decContextSaveStatus(decContext *, uint32_t);
michael@0 257 U_INTERNAL decContext * U_EXPORT2 uprv_decContextSetRounding(decContext *, enum rounding);
michael@0 258 U_INTERNAL decContext * U_EXPORT2 uprv_decContextSetStatus(decContext *, uint32_t);
michael@0 259 U_INTERNAL decContext * U_EXPORT2 uprv_decContextSetStatusFromString(decContext *, const char *);
michael@0 260 U_INTERNAL decContext * U_EXPORT2 uprv_decContextSetStatusFromStringQuiet(decContext *, const char *);
michael@0 261 U_INTERNAL decContext * U_EXPORT2 uprv_decContextSetStatusQuiet(decContext *, uint32_t);
michael@0 262 U_INTERNAL const char * U_EXPORT2 uprv_decContextStatusToString(const decContext *);
michael@0 263 U_INTERNAL int32_t U_EXPORT2 uprv_decContextTestEndian(uint8_t);
michael@0 264 U_INTERNAL uint32_t U_EXPORT2 uprv_decContextTestSavedStatus(uint32_t, uint32_t);
michael@0 265 U_INTERNAL uint32_t U_EXPORT2 uprv_decContextTestStatus(decContext *, uint32_t);
michael@0 266 U_INTERNAL decContext * U_EXPORT2 uprv_decContextZeroStatus(decContext *);
michael@0 267
michael@0 268 #endif

Mercurial Repository: The Tor Browser

Europalab SCM Repository Server

mercurial