| 1 | /* vsprintf with automatic memory allocation. |
| 2 | Copyright (C) 1999, 2002-2012 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU Lesser General Public License as published by |
| 6 | the Free Software Foundation; either version 2, or (at your option) |
| 7 | any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public License along |
| 15 | with this program; if not, write to the Free Software Foundation, |
| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 17 | |
| 18 | /* This file can be parametrized with the following macros: |
| 19 | VASNPRINTF The name of the function being defined. |
| 20 | FCHAR_T The element type of the format string. |
| 21 | DCHAR_T The element type of the destination (result) string. |
| 22 | FCHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters |
| 23 | in the format string are ASCII. MUST be set if |
| 24 | FCHAR_T and DCHAR_T are not the same type. |
| 25 | DIRECTIVE Structure denoting a format directive. |
| 26 | Depends on FCHAR_T. |
| 27 | DIRECTIVES Structure denoting the set of format directives of a |
| 28 | format string. Depends on FCHAR_T. |
| 29 | PRINTF_PARSE Function that parses a format string. |
| 30 | Depends on FCHAR_T. |
| 31 | DCHAR_CPY memcpy like function for DCHAR_T[] arrays. |
| 32 | DCHAR_SET memset like function for DCHAR_T[] arrays. |
| 33 | DCHAR_MBSNLEN mbsnlen like function for DCHAR_T[] arrays. |
| 34 | SNPRINTF The system's snprintf (or similar) function. |
| 35 | This may be either snprintf or swprintf. |
| 36 | TCHAR_T The element type of the argument and result string |
| 37 | of the said SNPRINTF function. This may be either |
| 38 | char or wchar_t. The code exploits that |
| 39 | sizeof (TCHAR_T) | sizeof (DCHAR_T) and |
| 40 | alignof (TCHAR_T) <= alignof (DCHAR_T). |
| 41 | DCHAR_IS_TCHAR Set to 1 if DCHAR_T and TCHAR_T are the same type. |
| 42 | DCHAR_CONV_FROM_ENCODING A function to convert from char[] to DCHAR[]. |
| 43 | DCHAR_IS_UINT8_T Set to 1 if DCHAR_T is uint8_t. |
| 44 | DCHAR_IS_UINT16_T Set to 1 if DCHAR_T is uint16_t. |
| 45 | DCHAR_IS_UINT32_T Set to 1 if DCHAR_T is uint32_t. */ |
| 46 | |
| 47 | /* Tell glibc's <stdio.h> to provide a prototype for snprintf(). |
| 48 | This must come before <config.h> because <config.h> may include |
| 49 | <features.h>, and once <features.h> has been included, it's too late. */ |
| 50 | #ifndef _GNU_SOURCE |
| 51 | # define _GNU_SOURCE 1 |
| 52 | #endif |
| 53 | |
| 54 | #ifndef VASNPRINTF |
| 55 | # include <config.h> |
| 56 | #endif |
| 57 | #ifndef IN_LIBINTL |
| 58 | # include <alloca.h> |
| 59 | #endif |
| 60 | |
| 61 | /* Specification. */ |
| 62 | #ifndef VASNPRINTF |
| 63 | # if WIDE_CHAR_VERSION |
| 64 | # include "vasnwprintf.h" |
| 65 | # else |
| 66 | # include "vasnprintf.h" |
| 67 | # endif |
| 68 | #endif |
| 69 | |
| 70 | #include <locale.h> /* localeconv() */ |
| 71 | #include <stdio.h> /* snprintf(), sprintf() */ |
| 72 | #include <stdlib.h> /* abort(), malloc(), realloc(), free() */ |
| 73 | #include <string.h> /* memcpy(), strlen() */ |
| 74 | #include <errno.h> /* errno */ |
| 75 | #include <limits.h> /* CHAR_BIT */ |
| 76 | #include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */ |
| 77 | #if HAVE_NL_LANGINFO |
| 78 | # include <langinfo.h> |
| 79 | #endif |
| 80 | #ifndef VASNPRINTF |
| 81 | # if WIDE_CHAR_VERSION |
| 82 | # include "wprintf-parse.h" |
| 83 | # else |
| 84 | # include "printf-parse.h" |
| 85 | # endif |
| 86 | #endif |
| 87 | |
| 88 | /* Checked size_t computations. */ |
| 89 | #include "xsize.h" |
| 90 | |
| 91 | #include "verify.h" |
| 92 | |
| 93 | #if (NEED_PRINTF_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL |
| 94 | # include <math.h> |
| 95 | # include "float+.h" |
| 96 | #endif |
| 97 | |
| 98 | #if (NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && !defined IN_LIBINTL |
| 99 | # include <math.h> |
| 100 | # include "isnand-nolibm.h" |
| 101 | #endif |
| 102 | |
| 103 | #if (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE) && !defined IN_LIBINTL |
| 104 | # include <math.h> |
| 105 | # include "isnanl-nolibm.h" |
| 106 | # include "fpucw.h" |
| 107 | #endif |
| 108 | |
| 109 | #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL |
| 110 | # include <math.h> |
| 111 | # include "isnand-nolibm.h" |
| 112 | # include "printf-frexp.h" |
| 113 | #endif |
| 114 | |
| 115 | #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL |
| 116 | # include <math.h> |
| 117 | # include "isnanl-nolibm.h" |
| 118 | # include "printf-frexpl.h" |
| 119 | # include "fpucw.h" |
| 120 | #endif |
| 121 | |
| 122 | /* Default parameters. */ |
| 123 | #ifndef VASNPRINTF |
| 124 | # if WIDE_CHAR_VERSION |
| 125 | # define VASNPRINTF vasnwprintf |
| 126 | # define FCHAR_T wchar_t |
| 127 | # define DCHAR_T wchar_t |
| 128 | # define TCHAR_T wchar_t |
| 129 | # define DCHAR_IS_TCHAR 1 |
| 130 | # define DIRECTIVE wchar_t_directive |
| 131 | # define DIRECTIVES wchar_t_directives |
| 132 | # define PRINTF_PARSE wprintf_parse |
| 133 | # define DCHAR_CPY wmemcpy |
| 134 | # define DCHAR_SET wmemset |
| 135 | # else |
| 136 | # define VASNPRINTF vasnprintf |
| 137 | # define FCHAR_T char |
| 138 | # define DCHAR_T char |
| 139 | # define TCHAR_T char |
| 140 | # define DCHAR_IS_TCHAR 1 |
| 141 | # define DIRECTIVE char_directive |
| 142 | # define DIRECTIVES char_directives |
| 143 | # define PRINTF_PARSE printf_parse |
| 144 | # define DCHAR_CPY memcpy |
| 145 | # define DCHAR_SET memset |
| 146 | # endif |
| 147 | #endif |
| 148 | #if WIDE_CHAR_VERSION |
| 149 | /* TCHAR_T is wchar_t. */ |
| 150 | # define USE_SNPRINTF 1 |
| 151 | # if HAVE_DECL__SNWPRINTF |
| 152 | /* On Windows, the function swprintf() has a different signature than |
| 153 | on Unix; we use the function _snwprintf() or - on mingw - snwprintf() |
| 154 | instead. The mingw function snwprintf() has fewer bugs than the |
| 155 | MSVCRT function _snwprintf(), so prefer that. */ |
| 156 | # if defined __MINGW32__ |
| 157 | # define SNPRINTF snwprintf |
| 158 | # else |
| 159 | # define SNPRINTF _snwprintf |
| 160 | # endif |
| 161 | # else |
| 162 | /* Unix. */ |
| 163 | # define SNPRINTF swprintf |
| 164 | # endif |
| 165 | #else |
| 166 | /* TCHAR_T is char. */ |
| 167 | /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'. |
| 168 | But don't use it on BeOS, since BeOS snprintf produces no output if the |
| 169 | size argument is >= 0x3000000. |
| 170 | Also don't use it on Linux libc5, since there snprintf with size = 1 |
| 171 | writes any output without bounds, like sprintf. */ |
| 172 | # if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__ && !(__GNU_LIBRARY__ == 1) |
| 173 | # define USE_SNPRINTF 1 |
| 174 | # else |
| 175 | # define USE_SNPRINTF 0 |
| 176 | # endif |
| 177 | # if HAVE_DECL__SNPRINTF |
| 178 | /* Windows. The mingw function snprintf() has fewer bugs than the MSVCRT |
| 179 | function _snprintf(), so prefer that. */ |
| 180 | # if defined __MINGW32__ |
| 181 | # define SNPRINTF snprintf |
| 182 | /* Here we need to call the native snprintf, not rpl_snprintf. */ |
| 183 | # undef snprintf |
| 184 | # else |
| 185 | # define SNPRINTF _snprintf |
| 186 | # endif |
| 187 | # else |
| 188 | /* Unix. */ |
| 189 | # define SNPRINTF snprintf |
| 190 | /* Here we need to call the native snprintf, not rpl_snprintf. */ |
| 191 | # undef snprintf |
| 192 | # endif |
| 193 | #endif |
| 194 | /* Here we need to call the native sprintf, not rpl_sprintf. */ |
| 195 | #undef sprintf |
| 196 | |
| 197 | /* GCC >= 4.0 with -Wall emits unjustified "... may be used uninitialized" |
| 198 | warnings in this file. Use -Dlint to suppress them. */ |
| 199 | #ifdef lint |
| 200 | # define IF_LINT(Code) Code |
| 201 | #else |
| 202 | # define IF_LINT(Code) /* empty */ |
| 203 | #endif |
| 204 | |
| 205 | /* Avoid some warnings from "gcc -Wshadow". |
| 206 | This file doesn't use the exp() and remainder() functions. */ |
| 207 | #undef exp |
| 208 | #define exp expo |
| 209 | #undef remainder |
| 210 | #define remainder rem |
| 211 | |
| 212 | #if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99) && !WIDE_CHAR_VERSION |
| 213 | # if (HAVE_STRNLEN && !defined _AIX) |
| 214 | # define local_strnlen strnlen |
| 215 | # else |
| 216 | # ifndef local_strnlen_defined |
| 217 | # define local_strnlen_defined 1 |
| 218 | static size_t |
| 219 | local_strnlen (const char *string, size_t maxlen) |
| 220 | { |
| 221 | const char *end = memchr (string, '\0', maxlen); |
| 222 | return end ? (size_t) (end - string) : maxlen; |
| 223 | } |
| 224 | # endif |
| 225 | # endif |
| 226 | #endif |
| 227 | |
| 228 | #if (((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99) && WIDE_CHAR_VERSION) || ((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && !WIDE_CHAR_VERSION && DCHAR_IS_TCHAR)) && HAVE_WCHAR_T |
| 229 | # if HAVE_WCSLEN |
| 230 | # define local_wcslen wcslen |
| 231 | # else |
| 232 | /* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid |
| 233 | a dependency towards this library, here is a local substitute. |
| 234 | Define this substitute only once, even if this file is included |
| 235 | twice in the same compilation unit. */ |
| 236 | # ifndef local_wcslen_defined |
| 237 | # define local_wcslen_defined 1 |
| 238 | static size_t |
| 239 | local_wcslen (const wchar_t *s) |
| 240 | { |
| 241 | const wchar_t *ptr; |
| 242 | |
| 243 | for (ptr = s; *ptr != (wchar_t) 0; ptr++) |
| 244 | ; |
| 245 | return ptr - s; |
| 246 | } |
| 247 | # endif |
| 248 | # endif |
| 249 | #endif |
| 250 | |
| 251 | #if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99) && HAVE_WCHAR_T && WIDE_CHAR_VERSION |
| 252 | # if HAVE_WCSNLEN |
| 253 | # define local_wcsnlen wcsnlen |
| 254 | # else |
| 255 | # ifndef local_wcsnlen_defined |
| 256 | # define local_wcsnlen_defined 1 |
| 257 | static size_t |
| 258 | local_wcsnlen (const wchar_t *s, size_t maxlen) |
| 259 | { |
| 260 | const wchar_t *ptr; |
| 261 | |
| 262 | for (ptr = s; maxlen > 0 && *ptr != (wchar_t) 0; ptr++, maxlen--) |
| 263 | ; |
| 264 | return ptr - s; |
| 265 | } |
| 266 | # endif |
| 267 | # endif |
| 268 | #endif |
| 269 | |
| 270 | #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && !defined IN_LIBINTL |
| 271 | /* Determine the decimal-point character according to the current locale. */ |
| 272 | # ifndef decimal_point_char_defined |
| 273 | # define decimal_point_char_defined 1 |
| 274 | static char |
| 275 | decimal_point_char (void) |
| 276 | { |
| 277 | const char *point; |
| 278 | /* Determine it in a multithread-safe way. We know nl_langinfo is |
| 279 | multithread-safe on glibc systems and MacOS X systems, but is not required |
| 280 | to be multithread-safe by POSIX. sprintf(), however, is multithread-safe. |
| 281 | localeconv() is rarely multithread-safe. */ |
| 282 | # if HAVE_NL_LANGINFO && (__GLIBC__ || defined __UCLIBC__ || (defined __APPLE__ && defined __MACH__)) |
| 283 | point = nl_langinfo (RADIXCHAR); |
| 284 | # elif 1 |
| 285 | char pointbuf[5]; |
| 286 | sprintf (pointbuf, "%#.0f", 1.0); |
| 287 | point = &pointbuf[1]; |
| 288 | # else |
| 289 | point = localeconv () -> decimal_point; |
| 290 | # endif |
| 291 | /* The decimal point is always a single byte: either '.' or ','. */ |
| 292 | return (point[0] != '\0' ? point[0] : '.'); |
| 293 | } |
| 294 | # endif |
| 295 | #endif |
| 296 | |
| 297 | #if NEED_PRINTF_INFINITE_DOUBLE && !NEED_PRINTF_DOUBLE && !defined IN_LIBINTL |
| 298 | |
| 299 | /* Equivalent to !isfinite(x) || x == 0, but does not require libm. */ |
| 300 | static int |
| 301 | is_infinite_or_zero (double x) |
| 302 | { |
| 303 | return isnand (x) || x + x == x; |
| 304 | } |
| 305 | |
| 306 | #endif |
| 307 | |
| 308 | #if NEED_PRINTF_INFINITE_LONG_DOUBLE && !NEED_PRINTF_LONG_DOUBLE && !defined IN_LIBINTL |
| 309 | |
| 310 | /* Equivalent to !isfinite(x) || x == 0, but does not require libm. */ |
| 311 | static int |
| 312 | is_infinite_or_zerol (long double x) |
| 313 | { |
| 314 | return isnanl (x) || x + x == x; |
| 315 | } |
| 316 | |
| 317 | #endif |
| 318 | |
| 319 | #if (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL |
| 320 | |
| 321 | /* Converting 'long double' to decimal without rare rounding bugs requires |
| 322 | real bignums. We use the naming conventions of GNU gmp, but vastly simpler |
| 323 | (and slower) algorithms. */ |
| 324 | |
| 325 | typedef unsigned int mp_limb_t; |
| 326 | # define GMP_LIMB_BITS 32 |
| 327 | verify (sizeof (mp_limb_t) * CHAR_BIT == GMP_LIMB_BITS); |
| 328 | |
| 329 | typedef unsigned long long mp_twolimb_t; |
| 330 | # define GMP_TWOLIMB_BITS 64 |
| 331 | verify (sizeof (mp_twolimb_t) * CHAR_BIT == GMP_TWOLIMB_BITS); |
| 332 | |
| 333 | /* Representation of a bignum >= 0. */ |
| 334 | typedef struct |
| 335 | { |
| 336 | size_t nlimbs; |
| 337 | mp_limb_t *limbs; /* Bits in little-endian order, allocated with malloc(). */ |
| 338 | } mpn_t; |
| 339 | |
| 340 | /* Compute the product of two bignums >= 0. |
| 341 | Return the allocated memory in case of success, NULL in case of memory |
| 342 | allocation failure. */ |
| 343 | static void * |
| 344 | multiply (mpn_t src1, mpn_t src2, mpn_t *dest) |
| 345 | { |
| 346 | const mp_limb_t *p1; |
| 347 | const mp_limb_t *p2; |
| 348 | size_t len1; |
| 349 | size_t len2; |
| 350 | |
| 351 | if (src1.nlimbs <= src2.nlimbs) |
| 352 | { |
| 353 | len1 = src1.nlimbs; |
| 354 | p1 = src1.limbs; |
| 355 | len2 = src2.nlimbs; |
| 356 | p2 = src2.limbs; |
| 357 | } |
| 358 | else |
| 359 | { |
| 360 | len1 = src2.nlimbs; |
| 361 | p1 = src2.limbs; |
| 362 | len2 = src1.nlimbs; |
| 363 | p2 = src1.limbs; |
| 364 | } |
| 365 | /* Now 0 <= len1 <= len2. */ |
| 366 | if (len1 == 0) |
| 367 | { |
| 368 | /* src1 or src2 is zero. */ |
| 369 | dest->nlimbs = 0; |
| 370 | dest->limbs = (mp_limb_t *) malloc (1); |
| 371 | } |
| 372 | else |
| 373 | { |
| 374 | /* Here 1 <= len1 <= len2. */ |
| 375 | size_t dlen; |
| 376 | mp_limb_t *dp; |
| 377 | size_t k, i, j; |
| 378 | |
| 379 | dlen = len1 + len2; |
| 380 | dp = (mp_limb_t *) malloc (dlen * sizeof (mp_limb_t)); |
| 381 | if (dp == NULL) |
| 382 | return NULL; |
| 383 | for (k = len2; k > 0; ) |
| 384 | dp[--k] = 0; |
| 385 | for (i = 0; i < len1; i++) |
| 386 | { |
| 387 | mp_limb_t digit1 = p1[i]; |
| 388 | mp_twolimb_t carry = 0; |
| 389 | for (j = 0; j < len2; j++) |
| 390 | { |
| 391 | mp_limb_t digit2 = p2[j]; |
| 392 | carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2; |
| 393 | carry += dp[i + j]; |
| 394 | dp[i + j] = (mp_limb_t) carry; |
| 395 | carry = carry >> GMP_LIMB_BITS; |
| 396 | } |
| 397 | dp[i + len2] = (mp_limb_t) carry; |
| 398 | } |
| 399 | /* Normalise. */ |
| 400 | while (dlen > 0 && dp[dlen - 1] == 0) |
| 401 | dlen--; |
| 402 | dest->nlimbs = dlen; |
| 403 | dest->limbs = dp; |
| 404 | } |
| 405 | return dest->limbs; |
| 406 | } |
| 407 | |
| 408 | /* Compute the quotient of a bignum a >= 0 and a bignum b > 0. |
| 409 | a is written as a = q * b + r with 0 <= r < b. q is the quotient, r |
| 410 | the remainder. |
| 411 | Finally, round-to-even is performed: If r > b/2 or if r = b/2 and q is odd, |
| 412 | q is incremented. |
| 413 | Return the allocated memory in case of success, NULL in case of memory |
| 414 | allocation failure. */ |
| 415 | static void * |
| 416 | divide (mpn_t a, mpn_t b, mpn_t *q) |
| 417 | { |
| 418 | /* Algorithm: |
| 419 | First normalise a and b: a=[a[m-1],...,a[0]], b=[b[n-1],...,b[0]] |
| 420 | with m>=0 and n>0 (in base beta = 2^GMP_LIMB_BITS). |
| 421 | If m<n, then q:=0 and r:=a. |
| 422 | If m>=n=1, perform a single-precision division: |
| 423 | r:=0, j:=m, |
| 424 | while j>0 do |
| 425 | {Here (q[m-1]*beta^(m-1)+...+q[j]*beta^j) * b[0] + r*beta^j = |
| 426 | = a[m-1]*beta^(m-1)+...+a[j]*beta^j und 0<=r<b[0]<beta} |
| 427 | j:=j-1, r:=r*beta+a[j], q[j]:=floor(r/b[0]), r:=r-b[0]*q[j]. |
| 428 | Normalise [q[m-1],...,q[0]], yields q. |
| 429 | If m>=n>1, perform a multiple-precision division: |
| 430 | We have a/b < beta^(m-n+1). |
| 431 | s:=intDsize-1-(highest bit in b[n-1]), 0<=s<intDsize. |
| 432 | Shift a and b left by s bits, copying them. r:=a. |
| 433 | r=[r[m],...,r[0]], b=[b[n-1],...,b[0]] with b[n-1]>=beta/2. |
| 434 | For j=m-n,...,0: {Here 0 <= r < b*beta^(j+1).} |
| 435 | Compute q* : |
| 436 | q* := floor((r[j+n]*beta+r[j+n-1])/b[n-1]). |
| 437 | In case of overflow (q* >= beta) set q* := beta-1. |
| 438 | Compute c2 := ((r[j+n]*beta+r[j+n-1]) - q* * b[n-1])*beta + r[j+n-2] |
| 439 | and c3 := b[n-2] * q*. |
| 440 | {We have 0 <= c2 < 2*beta^2, even 0 <= c2 < beta^2 if no overflow |
| 441 | occurred. Furthermore 0 <= c3 < beta^2. |
| 442 | If there was overflow and |
| 443 | r[j+n]*beta+r[j+n-1] - q* * b[n-1] >= beta, i.e. c2 >= beta^2, |
| 444 | the next test can be skipped.} |
| 445 | While c3 > c2, {Here 0 <= c2 < c3 < beta^2} |
| 446 | Put q* := q* - 1, c2 := c2 + b[n-1]*beta, c3 := c3 - b[n-2]. |
| 447 | If q* > 0: |
| 448 | Put r := r - b * q* * beta^j. In detail: |
| 449 | [r[n+j],...,r[j]] := [r[n+j],...,r[j]] - q* * [b[n-1],...,b[0]]. |
| 450 | hence: u:=0, for i:=0 to n-1 do |
| 451 | u := u + q* * b[i], |
| 452 | r[j+i]:=r[j+i]-(u mod beta) (+ beta, if carry), |
| 453 | u:=u div beta (+ 1, if carry in subtraction) |
| 454 | r[n+j]:=r[n+j]-u. |
| 455 | {Since always u = (q* * [b[i-1],...,b[0]] div beta^i) + 1 |
| 456 | < q* + 1 <= beta, |
| 457 | the carry u does not overflow.} |
| 458 | If a negative carry occurs, put q* := q* - 1 |
| 459 | and [r[n+j],...,r[j]] := [r[n+j],...,r[j]] + [0,b[n-1],...,b[0]]. |
| 460 | Set q[j] := q*. |
| 461 | Normalise [q[m-n],..,q[0]]; this yields the quotient q. |
| 462 | Shift [r[n-1],...,r[0]] right by s bits and normalise; this yields the |
| 463 | rest r. |
| 464 | The room for q[j] can be allocated at the memory location of r[n+j]. |
| 465 | Finally, round-to-even: |
| 466 | Shift r left by 1 bit. |
| 467 | If r > b or if r = b and q[0] is odd, q := q+1. |
| 468 | */ |
| 469 | const mp_limb_t *a_ptr = a.limbs; |
| 470 | size_t a_len = a.nlimbs; |
| 471 | const mp_limb_t *b_ptr = b.limbs; |
| 472 | size_t b_len = b.nlimbs; |
| 473 | mp_limb_t *roomptr; |
| 474 | mp_limb_t *tmp_roomptr = NULL; |
| 475 | mp_limb_t *q_ptr; |
| 476 | size_t q_len; |
| 477 | mp_limb_t *r_ptr; |
| 478 | size_t r_len; |
| 479 | |
| 480 | /* Allocate room for a_len+2 digits. |
| 481 | (Need a_len+1 digits for the real division and 1 more digit for the |
| 482 | final rounding of q.) */ |
| 483 | roomptr = (mp_limb_t *) malloc ((a_len + 2) * sizeof (mp_limb_t)); |
| 484 | if (roomptr == NULL) |
| 485 | return NULL; |
| 486 | |
| 487 | /* Normalise a. */ |
| 488 | while (a_len > 0 && a_ptr[a_len - 1] == 0) |
| 489 | a_len--; |
| 490 | |
| 491 | /* Normalise b. */ |
| 492 | for (;;) |
| 493 | { |
| 494 | if (b_len == 0) |
| 495 | /* Division by zero. */ |
| 496 | abort (); |
| 497 | if (b_ptr[b_len - 1] == 0) |
| 498 | b_len--; |
| 499 | else |
| 500 | break; |
| 501 | } |
| 502 | |
| 503 | /* Here m = a_len >= 0 and n = b_len > 0. */ |
| 504 | |
| 505 | if (a_len < b_len) |
| 506 | { |
| 507 | /* m<n: trivial case. q=0, r := copy of a. */ |
| 508 | r_ptr = roomptr; |
| 509 | r_len = a_len; |
| 510 | memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t)); |
| 511 | q_ptr = roomptr + a_len; |
| 512 | q_len = 0; |
| 513 | } |
| 514 | else if (b_len == 1) |
| 515 | { |
| 516 | /* n=1: single precision division. |
| 517 | beta^(m-1) <= a < beta^m ==> beta^(m-2) <= a/b < beta^m */ |
| 518 | r_ptr = roomptr; |
| 519 | q_ptr = roomptr + 1; |
| 520 | { |
| 521 | mp_limb_t den = b_ptr[0]; |
| 522 | mp_limb_t remainder = 0; |
| 523 | const mp_limb_t *sourceptr = a_ptr + a_len; |
| 524 | mp_limb_t *destptr = q_ptr + a_len; |
| 525 | size_t count; |
| 526 | for (count = a_len; count > 0; count--) |
| 527 | { |
| 528 | mp_twolimb_t num = |
| 529 | ((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--sourceptr; |
| 530 | *--destptr = num / den; |
| 531 | remainder = num % den; |
| 532 | } |
| 533 | /* Normalise and store r. */ |
| 534 | if (remainder > 0) |
| 535 | { |
| 536 | r_ptr[0] = remainder; |
| 537 | r_len = 1; |
| 538 | } |
| 539 | else |
| 540 | r_len = 0; |
| 541 | /* Normalise q. */ |
| 542 | q_len = a_len; |
| 543 | if (q_ptr[q_len - 1] == 0) |
| 544 | q_len--; |
| 545 | } |
| 546 | } |
| 547 | else |
| 548 | { |
| 549 | /* n>1: multiple precision division. |
| 550 | beta^(m-1) <= a < beta^m, beta^(n-1) <= b < beta^n ==> |
| 551 | beta^(m-n-1) <= a/b < beta^(m-n+1). */ |
| 552 | /* Determine s. */ |
| 553 | size_t s; |
| 554 | { |
| 555 | mp_limb_t msd = b_ptr[b_len - 1]; /* = b[n-1], > 0 */ |
| 556 | /* Determine s = GMP_LIMB_BITS - integer_length (msd). |
| 557 | Code copied from gnulib's integer_length.c. */ |
| 558 | # if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) |
| 559 | s = __builtin_clz (msd); |
| 560 | # else |
| 561 | # if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT |
| 562 | if (GMP_LIMB_BITS <= DBL_MANT_BIT) |
| 563 | { |
| 564 | /* Use 'double' operations. |
| 565 | Assumes an IEEE 754 'double' implementation. */ |
| 566 | # define DBL_EXP_MASK ((DBL_MAX_EXP - DBL_MIN_EXP) | 7) |
| 567 | # define DBL_EXP_BIAS (DBL_EXP_MASK / 2 - 1) |
| 568 | # define NWORDS \ |
| 569 | ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) |
| 570 | union { double value; unsigned int word[NWORDS]; } m; |
| 571 | |
| 572 | /* Use a single integer to floating-point conversion. */ |
| 573 | m.value = msd; |
| 574 | |
| 575 | s = GMP_LIMB_BITS |
| 576 | - (((m.word[DBL_EXPBIT0_WORD] >> DBL_EXPBIT0_BIT) & DBL_EXP_MASK) |
| 577 | - DBL_EXP_BIAS); |
| 578 | } |
| 579 | else |
| 580 | # undef NWORDS |
| 581 | # endif |
| 582 | { |
| 583 | s = 31; |
| 584 | if (msd >= 0x10000) |
| 585 | { |
| 586 | msd = msd >> 16; |
| 587 | s -= 16; |
| 588 | } |
| 589 | if (msd >= 0x100) |
| 590 | { |
| 591 | msd = msd >> 8; |
| 592 | s -= 8; |
| 593 | } |
| 594 | if (msd >= 0x10) |
| 595 | { |
| 596 | msd = msd >> 4; |
| 597 | s -= 4; |
| 598 | } |
| 599 | if (msd >= 0x4) |
| 600 | { |
| 601 | msd = msd >> 2; |
| 602 | s -= 2; |
| 603 | } |
| 604 | if (msd >= 0x2) |
| 605 | { |
| 606 | msd = msd >> 1; |
| 607 | s -= 1; |
| 608 | } |
| 609 | } |
| 610 | # endif |
| 611 | } |
| 612 | /* 0 <= s < GMP_LIMB_BITS. |
| 613 | Copy b, shifting it left by s bits. */ |
| 614 | if (s > 0) |
| 615 | { |
| 616 | tmp_roomptr = (mp_limb_t *) malloc (b_len * sizeof (mp_limb_t)); |
| 617 | if (tmp_roomptr == NULL) |
| 618 | { |
| 619 | free (roomptr); |
| 620 | return NULL; |
| 621 | } |
| 622 | { |
| 623 | const mp_limb_t *sourceptr = b_ptr; |
| 624 | mp_limb_t *destptr = tmp_roomptr; |
| 625 | mp_twolimb_t accu = 0; |
| 626 | size_t count; |
| 627 | for (count = b_len; count > 0; count--) |
| 628 | { |
| 629 | accu += (mp_twolimb_t) *sourceptr++ << s; |
| 630 | *destptr++ = (mp_limb_t) accu; |
| 631 | accu = accu >> GMP_LIMB_BITS; |
| 632 | } |
| 633 | /* accu must be zero, since that was how s was determined. */ |
| 634 | if (accu != 0) |
| 635 | abort (); |
| 636 | } |
| 637 | b_ptr = tmp_roomptr; |
| 638 | } |
| 639 | /* Copy a, shifting it left by s bits, yields r. |
| 640 | Memory layout: |
| 641 | At the beginning: r = roomptr[0..a_len], |
| 642 | at the end: r = roomptr[0..b_len-1], q = roomptr[b_len..a_len] */ |
| 643 | r_ptr = roomptr; |
| 644 | if (s == 0) |
| 645 | { |
| 646 | memcpy (r_ptr, a_ptr, a_len * sizeof (mp_limb_t)); |
| 647 | r_ptr[a_len] = 0; |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | const mp_limb_t *sourceptr = a_ptr; |
| 652 | mp_limb_t *destptr = r_ptr; |
| 653 | mp_twolimb_t accu = 0; |
| 654 | size_t count; |
| 655 | for (count = a_len; count > 0; count--) |
| 656 | { |
| 657 | accu += (mp_twolimb_t) *sourceptr++ << s; |
| 658 | *destptr++ = (mp_limb_t) accu; |
| 659 | accu = accu >> GMP_LIMB_BITS; |
| 660 | } |
| 661 | *destptr++ = (mp_limb_t) accu; |
| 662 | } |
| 663 | q_ptr = roomptr + b_len; |
| 664 | q_len = a_len - b_len + 1; /* q will have m-n+1 limbs */ |
| 665 | { |
| 666 | size_t j = a_len - b_len; /* m-n */ |
| 667 | mp_limb_t b_msd = b_ptr[b_len - 1]; /* b[n-1] */ |
| 668 | mp_limb_t b_2msd = b_ptr[b_len - 2]; /* b[n-2] */ |
| 669 | mp_twolimb_t b_msdd = /* b[n-1]*beta+b[n-2] */ |
| 670 | ((mp_twolimb_t) b_msd << GMP_LIMB_BITS) | b_2msd; |
| 671 | /* Division loop, traversed m-n+1 times. |
| 672 | j counts down, b is unchanged, beta/2 <= b[n-1] < beta. */ |
| 673 | for (;;) |
| 674 | { |
| 675 | mp_limb_t q_star; |
| 676 | mp_limb_t c1; |
| 677 | if (r_ptr[j + b_len] < b_msd) /* r[j+n] < b[n-1] ? */ |
| 678 | { |
| 679 | /* Divide r[j+n]*beta+r[j+n-1] by b[n-1], no overflow. */ |
| 680 | mp_twolimb_t num = |
| 681 | ((mp_twolimb_t) r_ptr[j + b_len] << GMP_LIMB_BITS) |
| 682 | | r_ptr[j + b_len - 1]; |
| 683 | q_star = num / b_msd; |
| 684 | c1 = num % b_msd; |
| 685 | } |
| 686 | else |
| 687 | { |
| 688 | /* Overflow, hence r[j+n]*beta+r[j+n-1] >= beta*b[n-1]. */ |
| 689 | q_star = (mp_limb_t)~(mp_limb_t)0; /* q* = beta-1 */ |
| 690 | /* Test whether r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] >= beta |
| 691 | <==> r[j+n]*beta+r[j+n-1] + b[n-1] >= beta*b[n-1]+beta |
| 692 | <==> b[n-1] < floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta) |
| 693 | {<= beta !}. |
| 694 | If yes, jump directly to the subtraction loop. |
| 695 | (Otherwise, r[j+n]*beta+r[j+n-1] - (beta-1)*b[n-1] < beta |
| 696 | <==> floor((r[j+n]*beta+r[j+n-1]+b[n-1])/beta) = b[n-1] ) */ |
| 697 | if (r_ptr[j + b_len] > b_msd |
| 698 | || (c1 = r_ptr[j + b_len - 1] + b_msd) < b_msd) |
| 699 | /* r[j+n] >= b[n-1]+1 or |
| 700 | r[j+n] = b[n-1] and the addition r[j+n-1]+b[n-1] gives a |
| 701 | carry. */ |
| 702 | goto subtract; |
| 703 | } |
| 704 | /* q_star = q*, |
| 705 | c1 = (r[j+n]*beta+r[j+n-1]) - q* * b[n-1] (>=0, <beta). */ |
| 706 | { |
| 707 | mp_twolimb_t c2 = /* c1*beta+r[j+n-2] */ |
| 708 | ((mp_twolimb_t) c1 << GMP_LIMB_BITS) | r_ptr[j + b_len - 2]; |
| 709 | mp_twolimb_t c3 = /* b[n-2] * q* */ |
| 710 | (mp_twolimb_t) b_2msd * (mp_twolimb_t) q_star; |
| 711 | /* While c2 < c3, increase c2 and decrease c3. |
| 712 | Consider c3-c2. While it is > 0, decrease it by |
| 713 | b[n-1]*beta+b[n-2]. Because of b[n-1]*beta+b[n-2] >= beta^2/2 |
| 714 | this can happen only twice. */ |
| 715 | if (c3 > c2) |
| 716 | { |
| 717 | q_star = q_star - 1; /* q* := q* - 1 */ |
| 718 | if (c3 - c2 > b_msdd) |
| 719 | q_star = q_star - 1; /* q* := q* - 1 */ |
| 720 | } |
| 721 | } |
| 722 | if (q_star > 0) |
| 723 | subtract: |
| 724 | { |
| 725 | /* Subtract r := r - b * q* * beta^j. */ |
| 726 | mp_limb_t cr; |
| 727 | { |
| 728 | const mp_limb_t *sourceptr = b_ptr; |
| 729 | mp_limb_t *destptr = r_ptr + j; |
| 730 | mp_twolimb_t carry = 0; |
| 731 | size_t count; |
| 732 | for (count = b_len; count > 0; count--) |
| 733 | { |
| 734 | /* Here 0 <= carry <= q*. */ |
| 735 | carry = |
| 736 | carry |
| 737 | + (mp_twolimb_t) q_star * (mp_twolimb_t) *sourceptr++ |
| 738 | + (mp_limb_t) ~(*destptr); |
| 739 | /* Here 0 <= carry <= beta*q* + beta-1. */ |
| 740 | *destptr++ = ~(mp_limb_t) carry; |
| 741 | carry = carry >> GMP_LIMB_BITS; /* <= q* */ |
| 742 | } |
| 743 | cr = (mp_limb_t) carry; |
| 744 | } |
| 745 | /* Subtract cr from r_ptr[j + b_len], then forget about |
| 746 | r_ptr[j + b_len]. */ |
| 747 | if (cr > r_ptr[j + b_len]) |
| 748 | { |
| 749 | /* Subtraction gave a carry. */ |
| 750 | q_star = q_star - 1; /* q* := q* - 1 */ |
| 751 | /* Add b back. */ |
| 752 | { |
| 753 | const mp_limb_t *sourceptr = b_ptr; |
| 754 | mp_limb_t *destptr = r_ptr + j; |
| 755 | mp_limb_t carry = 0; |
| 756 | size_t count; |
| 757 | for (count = b_len; count > 0; count--) |
| 758 | { |
| 759 | mp_limb_t source1 = *sourceptr++; |
| 760 | mp_limb_t source2 = *destptr; |
| 761 | *destptr++ = source1 + source2 + carry; |
| 762 | carry = |
| 763 | (carry |
| 764 | ? source1 >= (mp_limb_t) ~source2 |
| 765 | : source1 > (mp_limb_t) ~source2); |
| 766 | } |
| 767 | } |
| 768 | /* Forget about the carry and about r[j+n]. */ |
| 769 | } |
| 770 | } |
| 771 | /* q* is determined. Store it as q[j]. */ |
| 772 | q_ptr[j] = q_star; |
| 773 | if (j == 0) |
| 774 | break; |
| 775 | j--; |
| 776 | } |
| 777 | } |
| 778 | r_len = b_len; |
| 779 | /* Normalise q. */ |
| 780 | if (q_ptr[q_len - 1] == 0) |
| 781 | q_len--; |
| 782 | # if 0 /* Not needed here, since we need r only to compare it with b/2, and |
| 783 | b is shifted left by s bits. */ |
| 784 | /* Shift r right by s bits. */ |
| 785 | if (s > 0) |
| 786 | { |
| 787 | mp_limb_t ptr = r_ptr + r_len; |
| 788 | mp_twolimb_t accu = 0; |
| 789 | size_t count; |
| 790 | for (count = r_len; count > 0; count--) |
| 791 | { |
| 792 | accu = (mp_twolimb_t) (mp_limb_t) accu << GMP_LIMB_BITS; |
| 793 | accu += (mp_twolimb_t) *--ptr << (GMP_LIMB_BITS - s); |
| 794 | *ptr = (mp_limb_t) (accu >> GMP_LIMB_BITS); |
| 795 | } |
| 796 | } |
| 797 | # endif |
| 798 | /* Normalise r. */ |
| 799 | while (r_len > 0 && r_ptr[r_len - 1] == 0) |
| 800 | r_len--; |
| 801 | } |
| 802 | /* Compare r << 1 with b. */ |
| 803 | if (r_len > b_len) |
| 804 | goto increment_q; |
| 805 | { |
| 806 | size_t i; |
| 807 | for (i = b_len;;) |
| 808 | { |
| 809 | mp_limb_t r_i = |
| 810 | (i <= r_len && i > 0 ? r_ptr[i - 1] >> (GMP_LIMB_BITS - 1) : 0) |
| 811 | | (i < r_len ? r_ptr[i] << 1 : 0); |
| 812 | mp_limb_t b_i = (i < b_len ? b_ptr[i] : 0); |
| 813 | if (r_i > b_i) |
| 814 | goto increment_q; |
| 815 | if (r_i < b_i) |
| 816 | goto keep_q; |
| 817 | if (i == 0) |
| 818 | break; |
| 819 | i--; |
| 820 | } |
| 821 | } |
| 822 | if (q_len > 0 && ((q_ptr[0] & 1) != 0)) |
| 823 | /* q is odd. */ |
| 824 | increment_q: |
| 825 | { |
| 826 | size_t i; |
| 827 | for (i = 0; i < q_len; i++) |
| 828 | if (++(q_ptr[i]) != 0) |
| 829 | goto keep_q; |
| 830 | q_ptr[q_len++] = 1; |
| 831 | } |
| 832 | keep_q: |
| 833 | if (tmp_roomptr != NULL) |
| 834 | free (tmp_roomptr); |
| 835 | q->limbs = q_ptr; |
| 836 | q->nlimbs = q_len; |
| 837 | return roomptr; |
| 838 | } |
| 839 | |
| 840 | /* Convert a bignum a >= 0, multiplied with 10^extra_zeroes, to decimal |
| 841 | representation. |
| 842 | Destroys the contents of a. |
| 843 | Return the allocated memory - containing the decimal digits in low-to-high |
| 844 | order, terminated with a NUL character - in case of success, NULL in case |
| 845 | of memory allocation failure. */ |
| 846 | static char * |
| 847 | convert_to_decimal (mpn_t a, size_t extra_zeroes) |
| 848 | { |
| 849 | mp_limb_t *a_ptr = a.limbs; |
| 850 | size_t a_len = a.nlimbs; |
| 851 | /* 0.03345 is slightly larger than log(2)/(9*log(10)). */ |
| 852 | size_t c_len = 9 * ((size_t)(a_len * (GMP_LIMB_BITS * 0.03345f)) + 1); |
| 853 | char *c_ptr = (char *) malloc (xsum (c_len, extra_zeroes)); |
| 854 | if (c_ptr != NULL) |
| 855 | { |
| 856 | char *d_ptr = c_ptr; |
| 857 | for (; extra_zeroes > 0; extra_zeroes--) |
| 858 | *d_ptr++ = '0'; |
| 859 | while (a_len > 0) |
| 860 | { |
| 861 | /* Divide a by 10^9, in-place. */ |
| 862 | mp_limb_t remainder = 0; |
| 863 | mp_limb_t *ptr = a_ptr + a_len; |
| 864 | size_t count; |
| 865 | for (count = a_len; count > 0; count--) |
| 866 | { |
| 867 | mp_twolimb_t num = |
| 868 | ((mp_twolimb_t) remainder << GMP_LIMB_BITS) | *--ptr; |
| 869 | *ptr = num / 1000000000; |
| 870 | remainder = num % 1000000000; |
| 871 | } |
| 872 | /* Store the remainder as 9 decimal digits. */ |
| 873 | for (count = 9; count > 0; count--) |
| 874 | { |
| 875 | *d_ptr++ = '0' + (remainder % 10); |
| 876 | remainder = remainder / 10; |
| 877 | } |
| 878 | /* Normalize a. */ |
| 879 | if (a_ptr[a_len - 1] == 0) |
| 880 | a_len--; |
| 881 | } |
| 882 | /* Remove leading zeroes. */ |
| 883 | while (d_ptr > c_ptr && d_ptr[-1] == '0') |
| 884 | d_ptr--; |
| 885 | /* But keep at least one zero. */ |
| 886 | if (d_ptr == c_ptr) |
| 887 | *d_ptr++ = '0'; |
| 888 | /* Terminate the string. */ |
| 889 | *d_ptr = '\0'; |
| 890 | } |
| 891 | return c_ptr; |
| 892 | } |
| 893 | |
| 894 | # if NEED_PRINTF_LONG_DOUBLE |
| 895 | |
| 896 | /* Assuming x is finite and >= 0: |
| 897 | write x as x = 2^e * m, where m is a bignum. |
| 898 | Return the allocated memory in case of success, NULL in case of memory |
| 899 | allocation failure. */ |
| 900 | static void * |
| 901 | decode_long_double (long double x, int *ep, mpn_t *mp) |
| 902 | { |
| 903 | mpn_t m; |
| 904 | int exp; |
| 905 | long double y; |
| 906 | size_t i; |
| 907 | |
| 908 | /* Allocate memory for result. */ |
| 909 | m.nlimbs = (LDBL_MANT_BIT + GMP_LIMB_BITS - 1) / GMP_LIMB_BITS; |
| 910 | m.limbs = (mp_limb_t *) malloc (m.nlimbs * sizeof (mp_limb_t)); |
| 911 | if (m.limbs == NULL) |
| 912 | return NULL; |
| 913 | /* Split into exponential part and mantissa. */ |
| 914 | y = frexpl (x, &exp); |
| 915 | if (!(y >= 0.0L && y < 1.0L)) |
| 916 | abort (); |
| 917 | /* x = 2^exp * y = 2^(exp - LDBL_MANT_BIT) * (y * 2^LDBL_MANT_BIT), and the |
| 918 | latter is an integer. */ |
| 919 | /* Convert the mantissa (y * 2^LDBL_MANT_BIT) to a sequence of limbs. |
| 920 | I'm not sure whether it's safe to cast a 'long double' value between |
| 921 | 2^31 and 2^32 to 'unsigned int', therefore play safe and cast only |
| 922 | 'long double' values between 0 and 2^16 (to 'unsigned int' or 'int', |
| 923 | doesn't matter). */ |
| 924 | # if (LDBL_MANT_BIT % GMP_LIMB_BITS) != 0 |
| 925 | # if (LDBL_MANT_BIT % GMP_LIMB_BITS) > GMP_LIMB_BITS / 2 |
| 926 | { |
| 927 | mp_limb_t hi, lo; |
| 928 | y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % (GMP_LIMB_BITS / 2)); |
| 929 | hi = (int) y; |
| 930 | y -= hi; |
| 931 | if (!(y >= 0.0L && y < 1.0L)) |
| 932 | abort (); |
| 933 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 934 | lo = (int) y; |
| 935 | y -= lo; |
| 936 | if (!(y >= 0.0L && y < 1.0L)) |
| 937 | abort (); |
| 938 | m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = (hi << (GMP_LIMB_BITS / 2)) | lo; |
| 939 | } |
| 940 | # else |
| 941 | { |
| 942 | mp_limb_t d; |
| 943 | y *= (mp_limb_t) 1 << (LDBL_MANT_BIT % GMP_LIMB_BITS); |
| 944 | d = (int) y; |
| 945 | y -= d; |
| 946 | if (!(y >= 0.0L && y < 1.0L)) |
| 947 | abort (); |
| 948 | m.limbs[LDBL_MANT_BIT / GMP_LIMB_BITS] = d; |
| 949 | } |
| 950 | # endif |
| 951 | # endif |
| 952 | for (i = LDBL_MANT_BIT / GMP_LIMB_BITS; i > 0; ) |
| 953 | { |
| 954 | mp_limb_t hi, lo; |
| 955 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 956 | hi = (int) y; |
| 957 | y -= hi; |
| 958 | if (!(y >= 0.0L && y < 1.0L)) |
| 959 | abort (); |
| 960 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 961 | lo = (int) y; |
| 962 | y -= lo; |
| 963 | if (!(y >= 0.0L && y < 1.0L)) |
| 964 | abort (); |
| 965 | m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo; |
| 966 | } |
| 967 | # if 0 /* On FreeBSD 6.1/x86, 'long double' numbers sometimes have excess |
| 968 | precision. */ |
| 969 | if (!(y == 0.0L)) |
| 970 | abort (); |
| 971 | # endif |
| 972 | /* Normalise. */ |
| 973 | while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0) |
| 974 | m.nlimbs--; |
| 975 | *mp = m; |
| 976 | *ep = exp - LDBL_MANT_BIT; |
| 977 | return m.limbs; |
| 978 | } |
| 979 | |
| 980 | # endif |
| 981 | |
| 982 | # if NEED_PRINTF_DOUBLE |
| 983 | |
| 984 | /* Assuming x is finite and >= 0: |
| 985 | write x as x = 2^e * m, where m is a bignum. |
| 986 | Return the allocated memory in case of success, NULL in case of memory |
| 987 | allocation failure. */ |
| 988 | static void * |
| 989 | decode_double (double x, int *ep, mpn_t *mp) |
| 990 | { |
| 991 | mpn_t m; |
| 992 | int exp; |
| 993 | double y; |
| 994 | size_t i; |
| 995 | |
| 996 | /* Allocate memory for result. */ |
| 997 | m.nlimbs = (DBL_MANT_BIT + GMP_LIMB_BITS - 1) / GMP_LIMB_BITS; |
| 998 | m.limbs = (mp_limb_t *) malloc (m.nlimbs * sizeof (mp_limb_t)); |
| 999 | if (m.limbs == NULL) |
| 1000 | return NULL; |
| 1001 | /* Split into exponential part and mantissa. */ |
| 1002 | y = frexp (x, &exp); |
| 1003 | if (!(y >= 0.0 && y < 1.0)) |
| 1004 | abort (); |
| 1005 | /* x = 2^exp * y = 2^(exp - DBL_MANT_BIT) * (y * 2^DBL_MANT_BIT), and the |
| 1006 | latter is an integer. */ |
| 1007 | /* Convert the mantissa (y * 2^DBL_MANT_BIT) to a sequence of limbs. |
| 1008 | I'm not sure whether it's safe to cast a 'double' value between |
| 1009 | 2^31 and 2^32 to 'unsigned int', therefore play safe and cast only |
| 1010 | 'double' values between 0 and 2^16 (to 'unsigned int' or 'int', |
| 1011 | doesn't matter). */ |
| 1012 | # if (DBL_MANT_BIT % GMP_LIMB_BITS) != 0 |
| 1013 | # if (DBL_MANT_BIT % GMP_LIMB_BITS) > GMP_LIMB_BITS / 2 |
| 1014 | { |
| 1015 | mp_limb_t hi, lo; |
| 1016 | y *= (mp_limb_t) 1 << (DBL_MANT_BIT % (GMP_LIMB_BITS / 2)); |
| 1017 | hi = (int) y; |
| 1018 | y -= hi; |
| 1019 | if (!(y >= 0.0 && y < 1.0)) |
| 1020 | abort (); |
| 1021 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 1022 | lo = (int) y; |
| 1023 | y -= lo; |
| 1024 | if (!(y >= 0.0 && y < 1.0)) |
| 1025 | abort (); |
| 1026 | m.limbs[DBL_MANT_BIT / GMP_LIMB_BITS] = (hi << (GMP_LIMB_BITS / 2)) | lo; |
| 1027 | } |
| 1028 | # else |
| 1029 | { |
| 1030 | mp_limb_t d; |
| 1031 | y *= (mp_limb_t) 1 << (DBL_MANT_BIT % GMP_LIMB_BITS); |
| 1032 | d = (int) y; |
| 1033 | y -= d; |
| 1034 | if (!(y >= 0.0 && y < 1.0)) |
| 1035 | abort (); |
| 1036 | m.limbs[DBL_MANT_BIT / GMP_LIMB_BITS] = d; |
| 1037 | } |
| 1038 | # endif |
| 1039 | # endif |
| 1040 | for (i = DBL_MANT_BIT / GMP_LIMB_BITS; i > 0; ) |
| 1041 | { |
| 1042 | mp_limb_t hi, lo; |
| 1043 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 1044 | hi = (int) y; |
| 1045 | y -= hi; |
| 1046 | if (!(y >= 0.0 && y < 1.0)) |
| 1047 | abort (); |
| 1048 | y *= (mp_limb_t) 1 << (GMP_LIMB_BITS / 2); |
| 1049 | lo = (int) y; |
| 1050 | y -= lo; |
| 1051 | if (!(y >= 0.0 && y < 1.0)) |
| 1052 | abort (); |
| 1053 | m.limbs[--i] = (hi << (GMP_LIMB_BITS / 2)) | lo; |
| 1054 | } |
| 1055 | if (!(y == 0.0)) |
| 1056 | abort (); |
| 1057 | /* Normalise. */ |
| 1058 | while (m.nlimbs > 0 && m.limbs[m.nlimbs - 1] == 0) |
| 1059 | m.nlimbs--; |
| 1060 | *mp = m; |
| 1061 | *ep = exp - DBL_MANT_BIT; |
| 1062 | return m.limbs; |
| 1063 | } |
| 1064 | |
| 1065 | # endif |
| 1066 | |
| 1067 | /* Assuming x = 2^e * m is finite and >= 0, and n is an integer: |
| 1068 | Returns the decimal representation of round (x * 10^n). |
| 1069 | Return the allocated memory - containing the decimal digits in low-to-high |
| 1070 | order, terminated with a NUL character - in case of success, NULL in case |
| 1071 | of memory allocation failure. */ |
| 1072 | static char * |
| 1073 | scale10_round_decimal_decoded (int e, mpn_t m, void *memory, int n) |
| 1074 | { |
| 1075 | int s; |
| 1076 | size_t extra_zeroes; |
| 1077 | unsigned int abs_n; |
| 1078 | unsigned int abs_s; |
| 1079 | mp_limb_t *pow5_ptr; |
| 1080 | size_t pow5_len; |
| 1081 | unsigned int s_limbs; |
| 1082 | unsigned int s_bits; |
| 1083 | mpn_t pow5; |
| 1084 | mpn_t z; |
| 1085 | void *z_memory; |
| 1086 | char *digits; |
| 1087 | |
| 1088 | if (memory == NULL) |
| 1089 | return NULL; |
| 1090 | /* x = 2^e * m, hence |
| 1091 | y = round (2^e * 10^n * m) = round (2^(e+n) * 5^n * m) |
| 1092 | = round (2^s * 5^n * m). */ |
| 1093 | s = e + n; |
| 1094 | extra_zeroes = 0; |
| 1095 | /* Factor out a common power of 10 if possible. */ |
| 1096 | if (s > 0 && n > 0) |
| 1097 | { |
| 1098 | extra_zeroes = (s < n ? s : n); |
| 1099 | s -= extra_zeroes; |
| 1100 | n -= extra_zeroes; |
| 1101 | } |
| 1102 | /* Here y = round (2^s * 5^n * m) * 10^extra_zeroes. |
| 1103 | Before converting to decimal, we need to compute |
| 1104 | z = round (2^s * 5^n * m). */ |
| 1105 | /* Compute 5^|n|, possibly shifted by |s| bits if n and s have the same |
| 1106 | sign. 2.322 is slightly larger than log(5)/log(2). */ |
| 1107 | abs_n = (n >= 0 ? n : -n); |
| 1108 | abs_s = (s >= 0 ? s : -s); |
| 1109 | pow5_ptr = (mp_limb_t *) malloc (((int)(abs_n * (2.322f / GMP_LIMB_BITS)) + 1 |
| 1110 | + abs_s / GMP_LIMB_BITS + 1) |
| 1111 | * sizeof (mp_limb_t)); |
| 1112 | if (pow5_ptr == NULL) |
| 1113 | { |
| 1114 | free (memory); |
| 1115 | return NULL; |
| 1116 | } |
| 1117 | /* Initialize with 1. */ |
| 1118 | pow5_ptr[0] = 1; |
| 1119 | pow5_len = 1; |
| 1120 | /* Multiply with 5^|n|. */ |
| 1121 | if (abs_n > 0) |
| 1122 | { |
| 1123 | static mp_limb_t const small_pow5[13 + 1] = |
| 1124 | { |
| 1125 | 1, 5, 25, 125, 625, 3125, 15625, 78125, 390625, 1953125, 9765625, |
| 1126 | 48828125, 244140625, 1220703125 |
| 1127 | }; |
| 1128 | unsigned int n13; |
| 1129 | for (n13 = 0; n13 <= abs_n; n13 += 13) |
| 1130 | { |
| 1131 | mp_limb_t digit1 = small_pow5[n13 + 13 <= abs_n ? 13 : abs_n - n13]; |
| 1132 | size_t j; |
| 1133 | mp_twolimb_t carry = 0; |
| 1134 | for (j = 0; j < pow5_len; j++) |
| 1135 | { |
| 1136 | mp_limb_t digit2 = pow5_ptr[j]; |
| 1137 | carry += (mp_twolimb_t) digit1 * (mp_twolimb_t) digit2; |
| 1138 | pow5_ptr[j] = (mp_limb_t) carry; |
| 1139 | carry = carry >> GMP_LIMB_BITS; |
| 1140 | } |
| 1141 | if (carry > 0) |
| 1142 | pow5_ptr[pow5_len++] = (mp_limb_t) carry; |
| 1143 | } |
| 1144 | } |
| 1145 | s_limbs = abs_s / GMP_LIMB_BITS; |
| 1146 | s_bits = abs_s % GMP_LIMB_BITS; |
| 1147 | if (n >= 0 ? s >= 0 : s <= 0) |
| 1148 | { |
| 1149 | /* Multiply with 2^|s|. */ |
| 1150 | if (s_bits > 0) |
| 1151 | { |
| 1152 | mp_limb_t *ptr = pow5_ptr; |
| 1153 | mp_twolimb_t accu = 0; |
| 1154 | size_t count; |
| 1155 | for (count = pow5_len; count > 0; count--) |
| 1156 | { |
| 1157 | accu += (mp_twolimb_t) *ptr << s_bits; |
| 1158 | *ptr++ = (mp_limb_t) accu; |
| 1159 | accu = accu >> GMP_LIMB_BITS; |
| 1160 | } |
| 1161 | if (accu > 0) |
| 1162 | { |
| 1163 | *ptr = (mp_limb_t) accu; |
| 1164 | pow5_len++; |
| 1165 | } |
| 1166 | } |
| 1167 | if (s_limbs > 0) |
| 1168 | { |
| 1169 | size_t count; |
| 1170 | for (count = pow5_len; count > 0;) |
| 1171 | { |
| 1172 | count--; |
| 1173 | pow5_ptr[s_limbs + count] = pow5_ptr[count]; |
| 1174 | } |
| 1175 | for (count = s_limbs; count > 0;) |
| 1176 | { |
| 1177 | count--; |
| 1178 | pow5_ptr[count] = 0; |
| 1179 | } |
| 1180 | pow5_len += s_limbs; |
| 1181 | } |
| 1182 | pow5.limbs = pow5_ptr; |
| 1183 | pow5.nlimbs = pow5_len; |
| 1184 | if (n >= 0) |
| 1185 | { |
| 1186 | /* Multiply m with pow5. No division needed. */ |
| 1187 | z_memory = multiply (m, pow5, &z); |
| 1188 | } |
| 1189 | else |
| 1190 | { |
| 1191 | /* Divide m by pow5 and round. */ |
| 1192 | z_memory = divide (m, pow5, &z); |
| 1193 | } |
| 1194 | } |
| 1195 | else |
| 1196 | { |
| 1197 | pow5.limbs = pow5_ptr; |
| 1198 | pow5.nlimbs = pow5_len; |
| 1199 | if (n >= 0) |
| 1200 | { |
| 1201 | /* n >= 0, s < 0. |
| 1202 | Multiply m with pow5, then divide by 2^|s|. */ |
| 1203 | mpn_t numerator; |
| 1204 | mpn_t denominator; |
| 1205 | void *tmp_memory; |
| 1206 | tmp_memory = multiply (m, pow5, &numerator); |
| 1207 | if (tmp_memory == NULL) |
| 1208 | { |
| 1209 | free (pow5_ptr); |
| 1210 | free (memory); |
| 1211 | return NULL; |
| 1212 | } |
| 1213 | /* Construct 2^|s|. */ |
| 1214 | { |
| 1215 | mp_limb_t *ptr = pow5_ptr + pow5_len; |
| 1216 | size_t i; |
| 1217 | for (i = 0; i < s_limbs; i++) |
| 1218 | ptr[i] = 0; |
| 1219 | ptr[s_limbs] = (mp_limb_t) 1 << s_bits; |
| 1220 | denominator.limbs = ptr; |
| 1221 | denominator.nlimbs = s_limbs + 1; |
| 1222 | } |
| 1223 | z_memory = divide (numerator, denominator, &z); |
| 1224 | free (tmp_memory); |
| 1225 | } |
| 1226 | else |
| 1227 | { |
| 1228 | /* n < 0, s > 0. |
| 1229 | Multiply m with 2^s, then divide by pow5. */ |
| 1230 | mpn_t numerator; |
| 1231 | mp_limb_t *num_ptr; |
| 1232 | num_ptr = (mp_limb_t *) malloc ((m.nlimbs + s_limbs + 1) |
| 1233 | * sizeof (mp_limb_t)); |
| 1234 | if (num_ptr == NULL) |
| 1235 | { |
| 1236 | free (pow5_ptr); |
| 1237 | free (memory); |
| 1238 | return NULL; |
| 1239 | } |
| 1240 | { |
| 1241 | mp_limb_t *destptr = num_ptr; |
| 1242 | { |
| 1243 | size_t i; |
| 1244 | for (i = 0; i < s_limbs; i++) |
| 1245 | *destptr++ = 0; |
| 1246 | } |
| 1247 | if (s_bits > 0) |
| 1248 | { |
| 1249 | const mp_limb_t *sourceptr = m.limbs; |
| 1250 | mp_twolimb_t accu = 0; |
| 1251 | size_t count; |
| 1252 | for (count = m.nlimbs; count > 0; count--) |
| 1253 | { |
| 1254 | accu += (mp_twolimb_t) *sourceptr++ << s_bits; |
| 1255 | *destptr++ = (mp_limb_t) accu; |
| 1256 | accu = accu >> GMP_LIMB_BITS; |
| 1257 | } |
| 1258 | if (accu > 0) |
| 1259 | *destptr++ = (mp_limb_t) accu; |
| 1260 | } |
| 1261 | else |
| 1262 | { |
| 1263 | const mp_limb_t *sourceptr = m.limbs; |
| 1264 | size_t count; |
| 1265 | for (count = m.nlimbs; count > 0; count--) |
| 1266 | *destptr++ = *sourceptr++; |
| 1267 | } |
| 1268 | numerator.limbs = num_ptr; |
| 1269 | numerator.nlimbs = destptr - num_ptr; |
| 1270 | } |
| 1271 | z_memory = divide (numerator, pow5, &z); |
| 1272 | free (num_ptr); |
| 1273 | } |
| 1274 | } |
| 1275 | free (pow5_ptr); |
| 1276 | free (memory); |
| 1277 | |
| 1278 | /* Here y = round (x * 10^n) = z * 10^extra_zeroes. */ |
| 1279 | |
| 1280 | if (z_memory == NULL) |
| 1281 | return NULL; |
| 1282 | digits = convert_to_decimal (z, extra_zeroes); |
| 1283 | free (z_memory); |
| 1284 | return digits; |
| 1285 | } |
| 1286 | |
| 1287 | # if NEED_PRINTF_LONG_DOUBLE |
| 1288 | |
| 1289 | /* Assuming x is finite and >= 0, and n is an integer: |
| 1290 | Returns the decimal representation of round (x * 10^n). |
| 1291 | Return the allocated memory - containing the decimal digits in low-to-high |
| 1292 | order, terminated with a NUL character - in case of success, NULL in case |
| 1293 | of memory allocation failure. */ |
| 1294 | static char * |
| 1295 | scale10_round_decimal_long_double (long double x, int n) |
| 1296 | { |
| 1297 | int e IF_LINT(= 0); |
| 1298 | mpn_t m; |
| 1299 | void *memory = decode_long_double (x, &e, &m); |
| 1300 | return scale10_round_decimal_decoded (e, m, memory, n); |
| 1301 | } |
| 1302 | |
| 1303 | # endif |
| 1304 | |
| 1305 | # if NEED_PRINTF_DOUBLE |
| 1306 | |
| 1307 | /* Assuming x is finite and >= 0, and n is an integer: |
| 1308 | Returns the decimal representation of round (x * 10^n). |
| 1309 | Return the allocated memory - containing the decimal digits in low-to-high |
| 1310 | order, terminated with a NUL character - in case of success, NULL in case |
| 1311 | of memory allocation failure. */ |
| 1312 | static char * |
| 1313 | scale10_round_decimal_double (double x, int n) |
| 1314 | { |
| 1315 | int e IF_LINT(= 0); |
| 1316 | mpn_t m; |
| 1317 | void *memory = decode_double (x, &e, &m); |
| 1318 | return scale10_round_decimal_decoded (e, m, memory, n); |
| 1319 | } |
| 1320 | |
| 1321 | # endif |
| 1322 | |
| 1323 | # if NEED_PRINTF_LONG_DOUBLE |
| 1324 | |
| 1325 | /* Assuming x is finite and > 0: |
| 1326 | Return an approximation for n with 10^n <= x < 10^(n+1). |
| 1327 | The approximation is usually the right n, but may be off by 1 sometimes. */ |
| 1328 | static int |
| 1329 | floorlog10l (long double x) |
| 1330 | { |
| 1331 | int exp; |
| 1332 | long double y; |
| 1333 | double z; |
| 1334 | double l; |
| 1335 | |
| 1336 | /* Split into exponential part and mantissa. */ |
| 1337 | y = frexpl (x, &exp); |
| 1338 | if (!(y >= 0.0L && y < 1.0L)) |
| 1339 | abort (); |
| 1340 | if (y == 0.0L) |
| 1341 | return INT_MIN; |
| 1342 | if (y < 0.5L) |
| 1343 | { |
| 1344 | while (y < (1.0L / (1 << (GMP_LIMB_BITS / 2)) / (1 << (GMP_LIMB_BITS / 2)))) |
| 1345 | { |
| 1346 | y *= 1.0L * (1 << (GMP_LIMB_BITS / 2)) * (1 << (GMP_LIMB_BITS / 2)); |
| 1347 | exp -= GMP_LIMB_BITS; |
| 1348 | } |
| 1349 | if (y < (1.0L / (1 << 16))) |
| 1350 | { |
| 1351 | y *= 1.0L * (1 << 16); |
| 1352 | exp -= 16; |
| 1353 | } |
| 1354 | if (y < (1.0L / (1 << 8))) |
| 1355 | { |
| 1356 | y *= 1.0L * (1 << 8); |
| 1357 | exp -= 8; |
| 1358 | } |
| 1359 | if (y < (1.0L / (1 << 4))) |
| 1360 | { |
| 1361 | y *= 1.0L * (1 << 4); |
| 1362 | exp -= 4; |
| 1363 | } |
| 1364 | if (y < (1.0L / (1 << 2))) |
| 1365 | { |
| 1366 | y *= 1.0L * (1 << 2); |
| 1367 | exp -= 2; |
| 1368 | } |
| 1369 | if (y < (1.0L / (1 << 1))) |
| 1370 | { |
| 1371 | y *= 1.0L * (1 << 1); |
| 1372 | exp -= 1; |
| 1373 | } |
| 1374 | } |
| 1375 | if (!(y >= 0.5L && y < 1.0L)) |
| 1376 | abort (); |
| 1377 | /* Compute an approximation for l = log2(x) = exp + log2(y). */ |
| 1378 | l = exp; |
| 1379 | z = y; |
| 1380 | if (z < 0.70710678118654752444) |
| 1381 | { |
| 1382 | z *= 1.4142135623730950488; |
| 1383 | l -= 0.5; |
| 1384 | } |
| 1385 | if (z < 0.8408964152537145431) |
| 1386 | { |
| 1387 | z *= 1.1892071150027210667; |
| 1388 | l -= 0.25; |
| 1389 | } |
| 1390 | if (z < 0.91700404320467123175) |
| 1391 | { |
| 1392 | z *= 1.0905077326652576592; |
| 1393 | l -= 0.125; |
| 1394 | } |
| 1395 | if (z < 0.9576032806985736469) |
| 1396 | { |
| 1397 | z *= 1.0442737824274138403; |
| 1398 | l -= 0.0625; |
| 1399 | } |
| 1400 | /* Now 0.95 <= z <= 1.01. */ |
| 1401 | z = 1 - z; |
| 1402 | /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...) |
| 1403 | Four terms are enough to get an approximation with error < 10^-7. */ |
| 1404 | l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); |
| 1405 | /* Finally multiply with log(2)/log(10), yields an approximation for |
| 1406 | log10(x). */ |
| 1407 | l *= 0.30102999566398119523; |
| 1408 | /* Round down to the next integer. */ |
| 1409 | return (int) l + (l < 0 ? -1 : 0); |
| 1410 | } |
| 1411 | |
| 1412 | # endif |
| 1413 | |
| 1414 | # if NEED_PRINTF_DOUBLE |
| 1415 | |
| 1416 | /* Assuming x is finite and > 0: |
| 1417 | Return an approximation for n with 10^n <= x < 10^(n+1). |
| 1418 | The approximation is usually the right n, but may be off by 1 sometimes. */ |
| 1419 | static int |
| 1420 | floorlog10 (double x) |
| 1421 | { |
| 1422 | int exp; |
| 1423 | double y; |
| 1424 | double z; |
| 1425 | double l; |
| 1426 | |
| 1427 | /* Split into exponential part and mantissa. */ |
| 1428 | y = frexp (x, &exp); |
| 1429 | if (!(y >= 0.0 && y < 1.0)) |
| 1430 | abort (); |
| 1431 | if (y == 0.0) |
| 1432 | return INT_MIN; |
| 1433 | if (y < 0.5) |
| 1434 | { |
| 1435 | while (y < (1.0 / (1 << (GMP_LIMB_BITS / 2)) / (1 << (GMP_LIMB_BITS / 2)))) |
| 1436 | { |
| 1437 | y *= 1.0 * (1 << (GMP_LIMB_BITS / 2)) * (1 << (GMP_LIMB_BITS / 2)); |
| 1438 | exp -= GMP_LIMB_BITS; |
| 1439 | } |
| 1440 | if (y < (1.0 / (1 << 16))) |
| 1441 | { |
| 1442 | y *= 1.0 * (1 << 16); |
| 1443 | exp -= 16; |
| 1444 | } |
| 1445 | if (y < (1.0 / (1 << 8))) |
| 1446 | { |
| 1447 | y *= 1.0 * (1 << 8); |
| 1448 | exp -= 8; |
| 1449 | } |
| 1450 | if (y < (1.0 / (1 << 4))) |
| 1451 | { |
| 1452 | y *= 1.0 * (1 << 4); |
| 1453 | exp -= 4; |
| 1454 | } |
| 1455 | if (y < (1.0 / (1 << 2))) |
| 1456 | { |
| 1457 | y *= 1.0 * (1 << 2); |
| 1458 | exp -= 2; |
| 1459 | } |
| 1460 | if (y < (1.0 / (1 << 1))) |
| 1461 | { |
| 1462 | y *= 1.0 * (1 << 1); |
| 1463 | exp -= 1; |
| 1464 | } |
| 1465 | } |
| 1466 | if (!(y >= 0.5 && y < 1.0)) |
| 1467 | abort (); |
| 1468 | /* Compute an approximation for l = log2(x) = exp + log2(y). */ |
| 1469 | l = exp; |
| 1470 | z = y; |
| 1471 | if (z < 0.70710678118654752444) |
| 1472 | { |
| 1473 | z *= 1.4142135623730950488; |
| 1474 | l -= 0.5; |
| 1475 | } |
| 1476 | if (z < 0.8408964152537145431) |
| 1477 | { |
| 1478 | z *= 1.1892071150027210667; |
| 1479 | l -= 0.25; |
| 1480 | } |
| 1481 | if (z < 0.91700404320467123175) |
| 1482 | { |
| 1483 | z *= 1.0905077326652576592; |
| 1484 | l -= 0.125; |
| 1485 | } |
| 1486 | if (z < 0.9576032806985736469) |
| 1487 | { |
| 1488 | z *= 1.0442737824274138403; |
| 1489 | l -= 0.0625; |
| 1490 | } |
| 1491 | /* Now 0.95 <= z <= 1.01. */ |
| 1492 | z = 1 - z; |
| 1493 | /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...) |
| 1494 | Four terms are enough to get an approximation with error < 10^-7. */ |
| 1495 | l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); |
| 1496 | /* Finally multiply with log(2)/log(10), yields an approximation for |
| 1497 | log10(x). */ |
| 1498 | l *= 0.30102999566398119523; |
| 1499 | /* Round down to the next integer. */ |
| 1500 | return (int) l + (l < 0 ? -1 : 0); |
| 1501 | } |
| 1502 | |
| 1503 | # endif |
| 1504 | |
| 1505 | /* Tests whether a string of digits consists of exactly PRECISION zeroes and |
| 1506 | a single '1' digit. */ |
| 1507 | static int |
| 1508 | is_borderline (const char *digits, size_t precision) |
| 1509 | { |
| 1510 | for (; precision > 0; precision--, digits++) |
| 1511 | if (*digits != '0') |
| 1512 | return 0; |
| 1513 | if (*digits != '1') |
| 1514 | return 0; |
| 1515 | digits++; |
| 1516 | return *digits == '\0'; |
| 1517 | } |
| 1518 | |
| 1519 | #endif |
| 1520 | |
| 1521 | #if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 |
| 1522 | |
| 1523 | /* Use a different function name, to make it possible that the 'wchar_t' |
| 1524 | parametrization and the 'char' parametrization get compiled in the same |
| 1525 | translation unit. */ |
| 1526 | # if WIDE_CHAR_VERSION |
| 1527 | # define MAX_ROOM_NEEDED wmax_room_needed |
| 1528 | # else |
| 1529 | # define MAX_ROOM_NEEDED max_room_needed |
| 1530 | # endif |
| 1531 | |
| 1532 | /* Returns the number of TCHAR_T units needed as temporary space for the result |
| 1533 | of sprintf or SNPRINTF of a single conversion directive. */ |
| 1534 | static inline size_t |
| 1535 | MAX_ROOM_NEEDED (const arguments *ap, size_t arg_index, FCHAR_T conversion, |
| 1536 | arg_type type, int flags, size_t width, int has_precision, |
| 1537 | size_t precision, int pad_ourselves) |
| 1538 | { |
| 1539 | size_t tmp_length; |
| 1540 | |
| 1541 | switch (conversion) |
| 1542 | { |
| 1543 | case 'd': case 'i': case 'u': |
| 1544 | # if HAVE_LONG_LONG_INT |
| 1545 | if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT) |
| 1546 | tmp_length = |
| 1547 | (unsigned int) (sizeof (unsigned long long) * CHAR_BIT |
| 1548 | * 0.30103 /* binary -> decimal */ |
| 1549 | ) |
| 1550 | + 1; /* turn floor into ceil */ |
| 1551 | else |
| 1552 | # endif |
| 1553 | if (type == TYPE_LONGINT || type == TYPE_ULONGINT) |
| 1554 | tmp_length = |
| 1555 | (unsigned int) (sizeof (unsigned long) * CHAR_BIT |
| 1556 | * 0.30103 /* binary -> decimal */ |
| 1557 | ) |
| 1558 | + 1; /* turn floor into ceil */ |
| 1559 | else |
| 1560 | tmp_length = |
| 1561 | (unsigned int) (sizeof (unsigned int) * CHAR_BIT |
| 1562 | * 0.30103 /* binary -> decimal */ |
| 1563 | ) |
| 1564 | + 1; /* turn floor into ceil */ |
| 1565 | if (tmp_length < precision) |
| 1566 | tmp_length = precision; |
| 1567 | /* Multiply by 2, as an estimate for FLAG_GROUP. */ |
| 1568 | tmp_length = xsum (tmp_length, tmp_length); |
| 1569 | /* Add 1, to account for a leading sign. */ |
| 1570 | tmp_length = xsum (tmp_length, 1); |
| 1571 | break; |
| 1572 | |
| 1573 | case 'o': |
| 1574 | # if HAVE_LONG_LONG_INT |
| 1575 | if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT) |
| 1576 | tmp_length = |
| 1577 | (unsigned int) (sizeof (unsigned long long) * CHAR_BIT |
| 1578 | * 0.333334 /* binary -> octal */ |
| 1579 | ) |
| 1580 | + 1; /* turn floor into ceil */ |
| 1581 | else |
| 1582 | # endif |
| 1583 | if (type == TYPE_LONGINT || type == TYPE_ULONGINT) |
| 1584 | tmp_length = |
| 1585 | (unsigned int) (sizeof (unsigned long) * CHAR_BIT |
| 1586 | * 0.333334 /* binary -> octal */ |
| 1587 | ) |
| 1588 | + 1; /* turn floor into ceil */ |
| 1589 | else |
| 1590 | tmp_length = |
| 1591 | (unsigned int) (sizeof (unsigned int) * CHAR_BIT |
| 1592 | * 0.333334 /* binary -> octal */ |
| 1593 | ) |
| 1594 | + 1; /* turn floor into ceil */ |
| 1595 | if (tmp_length < precision) |
| 1596 | tmp_length = precision; |
| 1597 | /* Add 1, to account for a leading sign. */ |
| 1598 | tmp_length = xsum (tmp_length, 1); |
| 1599 | break; |
| 1600 | |
| 1601 | case 'x': case 'X': |
| 1602 | # if HAVE_LONG_LONG_INT |
| 1603 | if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT) |
| 1604 | tmp_length = |
| 1605 | (unsigned int) (sizeof (unsigned long long) * CHAR_BIT |
| 1606 | * 0.25 /* binary -> hexadecimal */ |
| 1607 | ) |
| 1608 | + 1; /* turn floor into ceil */ |
| 1609 | else |
| 1610 | # endif |
| 1611 | if (type == TYPE_LONGINT || type == TYPE_ULONGINT) |
| 1612 | tmp_length = |
| 1613 | (unsigned int) (sizeof (unsigned long) * CHAR_BIT |
| 1614 | * 0.25 /* binary -> hexadecimal */ |
| 1615 | ) |
| 1616 | + 1; /* turn floor into ceil */ |
| 1617 | else |
| 1618 | tmp_length = |
| 1619 | (unsigned int) (sizeof (unsigned int) * CHAR_BIT |
| 1620 | * 0.25 /* binary -> hexadecimal */ |
| 1621 | ) |
| 1622 | + 1; /* turn floor into ceil */ |
| 1623 | if (tmp_length < precision) |
| 1624 | tmp_length = precision; |
| 1625 | /* Add 2, to account for a leading sign or alternate form. */ |
| 1626 | tmp_length = xsum (tmp_length, 2); |
| 1627 | break; |
| 1628 | |
| 1629 | case 'f': case 'F': |
| 1630 | if (type == TYPE_LONGDOUBLE) |
| 1631 | tmp_length = |
| 1632 | (unsigned int) (LDBL_MAX_EXP |
| 1633 | * 0.30103 /* binary -> decimal */ |
| 1634 | * 2 /* estimate for FLAG_GROUP */ |
| 1635 | ) |
| 1636 | + 1 /* turn floor into ceil */ |
| 1637 | + 10; /* sign, decimal point etc. */ |
| 1638 | else |
| 1639 | tmp_length = |
| 1640 | (unsigned int) (DBL_MAX_EXP |
| 1641 | * 0.30103 /* binary -> decimal */ |
| 1642 | * 2 /* estimate for FLAG_GROUP */ |
| 1643 | ) |
| 1644 | + 1 /* turn floor into ceil */ |
| 1645 | + 10; /* sign, decimal point etc. */ |
| 1646 | tmp_length = xsum (tmp_length, precision); |
| 1647 | break; |
| 1648 | |
| 1649 | case 'e': case 'E': case 'g': case 'G': |
| 1650 | tmp_length = |
| 1651 | 12; /* sign, decimal point, exponent etc. */ |
| 1652 | tmp_length = xsum (tmp_length, precision); |
| 1653 | break; |
| 1654 | |
| 1655 | case 'a': case 'A': |
| 1656 | if (type == TYPE_LONGDOUBLE) |
| 1657 | tmp_length = |
| 1658 | (unsigned int) (LDBL_DIG |
| 1659 | * 0.831 /* decimal -> hexadecimal */ |
| 1660 | ) |
| 1661 | + 1; /* turn floor into ceil */ |
| 1662 | else |
| 1663 | tmp_length = |
| 1664 | (unsigned int) (DBL_DIG |
| 1665 | * 0.831 /* decimal -> hexadecimal */ |
| 1666 | ) |
| 1667 | + 1; /* turn floor into ceil */ |
| 1668 | if (tmp_length < precision) |
| 1669 | tmp_length = precision; |
| 1670 | /* Account for sign, decimal point etc. */ |
| 1671 | tmp_length = xsum (tmp_length, 12); |
| 1672 | break; |
| 1673 | |
| 1674 | case 'c': |
| 1675 | # if HAVE_WINT_T && !WIDE_CHAR_VERSION |
| 1676 | if (type == TYPE_WIDE_CHAR) |
| 1677 | tmp_length = MB_CUR_MAX; |
| 1678 | else |
| 1679 | # endif |
| 1680 | tmp_length = 1; |
| 1681 | break; |
| 1682 | |
| 1683 | case 's': |
| 1684 | # if HAVE_WCHAR_T |
| 1685 | if (type == TYPE_WIDE_STRING) |
| 1686 | { |
| 1687 | # if WIDE_CHAR_VERSION |
| 1688 | /* ISO C says about %ls in fwprintf: |
| 1689 | "If the precision is not specified or is greater than the size |
| 1690 | of the array, the array shall contain a null wide character." |
| 1691 | So if there is a precision, we must not use wcslen. */ |
| 1692 | const wchar_t *arg = ap->arg[arg_index].a.a_wide_string; |
| 1693 | |
| 1694 | if (has_precision) |
| 1695 | tmp_length = local_wcsnlen (arg, precision); |
| 1696 | else |
| 1697 | tmp_length = local_wcslen (arg); |
| 1698 | # else |
| 1699 | /* ISO C says about %ls in fprintf: |
| 1700 | "If a precision is specified, no more than that many bytes are |
| 1701 | written (including shift sequences, if any), and the array |
| 1702 | shall contain a null wide character if, to equal the multibyte |
| 1703 | character sequence length given by the precision, the function |
| 1704 | would need to access a wide character one past the end of the |
| 1705 | array." |
| 1706 | So if there is a precision, we must not use wcslen. */ |
| 1707 | /* This case has already been handled separately in VASNPRINTF. */ |
| 1708 | abort (); |
| 1709 | # endif |
| 1710 | } |
| 1711 | else |
| 1712 | # endif |
| 1713 | { |
| 1714 | # if WIDE_CHAR_VERSION |
| 1715 | /* ISO C says about %s in fwprintf: |
| 1716 | "If the precision is not specified or is greater than the size |
| 1717 | of the converted array, the converted array shall contain a |
| 1718 | null wide character." |
| 1719 | So if there is a precision, we must not use strlen. */ |
| 1720 | /* This case has already been handled separately in VASNPRINTF. */ |
| 1721 | abort (); |
| 1722 | # else |
| 1723 | /* ISO C says about %s in fprintf: |
| 1724 | "If the precision is not specified or greater than the size of |
| 1725 | the array, the array shall contain a null character." |
| 1726 | So if there is a precision, we must not use strlen. */ |
| 1727 | const char *arg = ap->arg[arg_index].a.a_string; |
| 1728 | |
| 1729 | if (has_precision) |
| 1730 | tmp_length = local_strnlen (arg, precision); |
| 1731 | else |
| 1732 | tmp_length = strlen (arg); |
| 1733 | # endif |
| 1734 | } |
| 1735 | break; |
| 1736 | |
| 1737 | case 'p': |
| 1738 | tmp_length = |
| 1739 | (unsigned int) (sizeof (void *) * CHAR_BIT |
| 1740 | * 0.25 /* binary -> hexadecimal */ |
| 1741 | ) |
| 1742 | + 1 /* turn floor into ceil */ |
| 1743 | + 2; /* account for leading 0x */ |
| 1744 | break; |
| 1745 | |
| 1746 | default: |
| 1747 | abort (); |
| 1748 | } |
| 1749 | |
| 1750 | if (!pad_ourselves) |
| 1751 | { |
| 1752 | # if ENABLE_UNISTDIO |
| 1753 | /* Padding considers the number of characters, therefore the number of |
| 1754 | elements after padding may be |
| 1755 | > max (tmp_length, width) |
| 1756 | but is certainly |
| 1757 | <= tmp_length + width. */ |
| 1758 | tmp_length = xsum (tmp_length, width); |
| 1759 | # else |
| 1760 | /* Padding considers the number of elements, says POSIX. */ |
| 1761 | if (tmp_length < width) |
| 1762 | tmp_length = width; |
| 1763 | # endif |
| 1764 | } |
| 1765 | |
| 1766 | tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */ |
| 1767 | |
| 1768 | return tmp_length; |
| 1769 | } |
| 1770 | |
| 1771 | #endif |
| 1772 | |
| 1773 | DCHAR_T * |
| 1774 | VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp, |
| 1775 | const FCHAR_T *format, va_list args) |
| 1776 | { |
| 1777 | DIRECTIVES d; |
| 1778 | arguments a; |
| 1779 | |
| 1780 | if (PRINTF_PARSE (format, &d, &a) < 0) |
| 1781 | /* errno is already set. */ |
| 1782 | return NULL; |
| 1783 | |
| 1784 | #define CLEANUP() \ |
| 1785 | if (d.dir != d.direct_alloc_dir) \ |
| 1786 | free (d.dir); \ |
| 1787 | if (a.arg != a.direct_alloc_arg) \ |
| 1788 | free (a.arg); |
| 1789 | |
| 1790 | if (PRINTF_FETCHARGS (args, &a) < 0) |
| 1791 | { |
| 1792 | CLEANUP (); |
| 1793 | errno = EINVAL; |
| 1794 | return NULL; |
| 1795 | } |
| 1796 | |
| 1797 | { |
| 1798 | size_t buf_neededlength; |
| 1799 | TCHAR_T *buf; |
| 1800 | TCHAR_T *buf_malloced; |
| 1801 | const FCHAR_T *cp; |
| 1802 | size_t i; |
| 1803 | DIRECTIVE *dp; |
| 1804 | /* Output string accumulator. */ |
| 1805 | DCHAR_T *result; |
| 1806 | size_t allocated; |
| 1807 | size_t length; |
| 1808 | |
| 1809 | /* Allocate a small buffer that will hold a directive passed to |
| 1810 | sprintf or snprintf. */ |
| 1811 | buf_neededlength = |
| 1812 | xsum4 (7, d.max_width_length, d.max_precision_length, 6); |
| 1813 | #if HAVE_ALLOCA |
| 1814 | if (buf_neededlength < 4000 / sizeof (TCHAR_T)) |
| 1815 | { |
| 1816 | buf = (TCHAR_T *) alloca (buf_neededlength * sizeof (TCHAR_T)); |
| 1817 | buf_malloced = NULL; |
| 1818 | } |
| 1819 | else |
| 1820 | #endif |
| 1821 | { |
| 1822 | size_t buf_memsize = xtimes (buf_neededlength, sizeof (TCHAR_T)); |
| 1823 | if (size_overflow_p (buf_memsize)) |
| 1824 | goto out_of_memory_1; |
| 1825 | buf = (TCHAR_T *) malloc (buf_memsize); |
| 1826 | if (buf == NULL) |
| 1827 | goto out_of_memory_1; |
| 1828 | buf_malloced = buf; |
| 1829 | } |
| 1830 | |
| 1831 | if (resultbuf != NULL) |
| 1832 | { |
| 1833 | result = resultbuf; |
| 1834 | allocated = *lengthp; |
| 1835 | } |
| 1836 | else |
| 1837 | { |
| 1838 | result = NULL; |
| 1839 | allocated = 0; |
| 1840 | } |
| 1841 | length = 0; |
| 1842 | /* Invariants: |
| 1843 | result is either == resultbuf or == NULL or malloc-allocated. |
| 1844 | If length > 0, then result != NULL. */ |
| 1845 | |
| 1846 | /* Ensures that allocated >= needed. Aborts through a jump to |
| 1847 | out_of_memory if needed is SIZE_MAX or otherwise too big. */ |
| 1848 | #define ENSURE_ALLOCATION(needed) \ |
| 1849 | if ((needed) > allocated) \ |
| 1850 | { \ |
| 1851 | size_t memory_size; \ |
| 1852 | DCHAR_T *memory; \ |
| 1853 | \ |
| 1854 | allocated = (allocated > 0 ? xtimes (allocated, 2) : 12); \ |
| 1855 | if ((needed) > allocated) \ |
| 1856 | allocated = (needed); \ |
| 1857 | memory_size = xtimes (allocated, sizeof (DCHAR_T)); \ |
| 1858 | if (size_overflow_p (memory_size)) \ |
| 1859 | goto out_of_memory; \ |
| 1860 | if (result == resultbuf || result == NULL) \ |
| 1861 | memory = (DCHAR_T *) malloc (memory_size); \ |
| 1862 | else \ |
| 1863 | memory = (DCHAR_T *) realloc (result, memory_size); \ |
| 1864 | if (memory == NULL) \ |
| 1865 | goto out_of_memory; \ |
| 1866 | if (result == resultbuf && length > 0) \ |
| 1867 | DCHAR_CPY (memory, result, length); \ |
| 1868 | result = memory; \ |
| 1869 | } |
| 1870 | |
| 1871 | for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++) |
| 1872 | { |
| 1873 | if (cp != dp->dir_start) |
| 1874 | { |
| 1875 | size_t n = dp->dir_start - cp; |
| 1876 | size_t augmented_length = xsum (length, n); |
| 1877 | |
| 1878 | ENSURE_ALLOCATION (augmented_length); |
| 1879 | /* This copies a piece of FCHAR_T[] into a DCHAR_T[]. Here we |
| 1880 | need that the format string contains only ASCII characters |
| 1881 | if FCHAR_T and DCHAR_T are not the same type. */ |
| 1882 | if (sizeof (FCHAR_T) == sizeof (DCHAR_T)) |
| 1883 | { |
| 1884 | DCHAR_CPY (result + length, (const DCHAR_T *) cp, n); |
| 1885 | length = augmented_length; |
| 1886 | } |
| 1887 | else |
| 1888 | { |
| 1889 | do |
| 1890 | result[length++] = (unsigned char) *cp++; |
| 1891 | while (--n > 0); |
| 1892 | } |
| 1893 | } |
| 1894 | if (i == d.count) |
| 1895 | break; |
| 1896 | |
| 1897 | /* Execute a single directive. */ |
| 1898 | if (dp->conversion == '%') |
| 1899 | { |
| 1900 | size_t augmented_length; |
| 1901 | |
| 1902 | if (!(dp->arg_index == ARG_NONE)) |
| 1903 | abort (); |
| 1904 | augmented_length = xsum (length, 1); |
| 1905 | ENSURE_ALLOCATION (augmented_length); |
| 1906 | result[length] = '%'; |
| 1907 | length = augmented_length; |
| 1908 | } |
| 1909 | else |
| 1910 | { |
| 1911 | if (!(dp->arg_index != ARG_NONE)) |
| 1912 | abort (); |
| 1913 | |
| 1914 | if (dp->conversion == 'n') |
| 1915 | { |
| 1916 | switch (a.arg[dp->arg_index].type) |
| 1917 | { |
| 1918 | case TYPE_COUNT_SCHAR_POINTER: |
| 1919 | *a.arg[dp->arg_index].a.a_count_schar_pointer = length; |
| 1920 | break; |
| 1921 | case TYPE_COUNT_SHORT_POINTER: |
| 1922 | *a.arg[dp->arg_index].a.a_count_short_pointer = length; |
| 1923 | break; |
| 1924 | case TYPE_COUNT_INT_POINTER: |
| 1925 | *a.arg[dp->arg_index].a.a_count_int_pointer = length; |
| 1926 | break; |
| 1927 | case TYPE_COUNT_LONGINT_POINTER: |
| 1928 | *a.arg[dp->arg_index].a.a_count_longint_pointer = length; |
| 1929 | break; |
| 1930 | #if HAVE_LONG_LONG_INT |
| 1931 | case TYPE_COUNT_LONGLONGINT_POINTER: |
| 1932 | *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length; |
| 1933 | break; |
| 1934 | #endif |
| 1935 | default: |
| 1936 | abort (); |
| 1937 | } |
| 1938 | } |
| 1939 | #if ENABLE_UNISTDIO |
| 1940 | /* The unistdio extensions. */ |
| 1941 | else if (dp->conversion == 'U') |
| 1942 | { |
| 1943 | arg_type type = a.arg[dp->arg_index].type; |
| 1944 | int flags = dp->flags; |
| 1945 | int has_width; |
| 1946 | size_t width; |
| 1947 | int has_precision; |
| 1948 | size_t precision; |
| 1949 | |
| 1950 | has_width = 0; |
| 1951 | width = 0; |
| 1952 | if (dp->width_start != dp->width_end) |
| 1953 | { |
| 1954 | if (dp->width_arg_index != ARG_NONE) |
| 1955 | { |
| 1956 | int arg; |
| 1957 | |
| 1958 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 1959 | abort (); |
| 1960 | arg = a.arg[dp->width_arg_index].a.a_int; |
| 1961 | if (arg < 0) |
| 1962 | { |
| 1963 | /* "A negative field width is taken as a '-' flag |
| 1964 | followed by a positive field width." */ |
| 1965 | flags |= FLAG_LEFT; |
| 1966 | width = (unsigned int) (-arg); |
| 1967 | } |
| 1968 | else |
| 1969 | width = arg; |
| 1970 | } |
| 1971 | else |
| 1972 | { |
| 1973 | const FCHAR_T *digitp = dp->width_start; |
| 1974 | |
| 1975 | do |
| 1976 | width = xsum (xtimes (width, 10), *digitp++ - '0'); |
| 1977 | while (digitp != dp->width_end); |
| 1978 | } |
| 1979 | has_width = 1; |
| 1980 | } |
| 1981 | |
| 1982 | has_precision = 0; |
| 1983 | precision = 0; |
| 1984 | if (dp->precision_start != dp->precision_end) |
| 1985 | { |
| 1986 | if (dp->precision_arg_index != ARG_NONE) |
| 1987 | { |
| 1988 | int arg; |
| 1989 | |
| 1990 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 1991 | abort (); |
| 1992 | arg = a.arg[dp->precision_arg_index].a.a_int; |
| 1993 | /* "A negative precision is taken as if the precision |
| 1994 | were omitted." */ |
| 1995 | if (arg >= 0) |
| 1996 | { |
| 1997 | precision = arg; |
| 1998 | has_precision = 1; |
| 1999 | } |
| 2000 | } |
| 2001 | else |
| 2002 | { |
| 2003 | const FCHAR_T *digitp = dp->precision_start + 1; |
| 2004 | |
| 2005 | precision = 0; |
| 2006 | while (digitp != dp->precision_end) |
| 2007 | precision = xsum (xtimes (precision, 10), *digitp++ - '0'); |
| 2008 | has_precision = 1; |
| 2009 | } |
| 2010 | } |
| 2011 | |
| 2012 | switch (type) |
| 2013 | { |
| 2014 | case TYPE_U8_STRING: |
| 2015 | { |
| 2016 | const uint8_t *arg = a.arg[dp->arg_index].a.a_u8_string; |
| 2017 | const uint8_t *arg_end; |
| 2018 | size_t characters; |
| 2019 | |
| 2020 | if (has_precision) |
| 2021 | { |
| 2022 | /* Use only PRECISION characters, from the left. */ |
| 2023 | arg_end = arg; |
| 2024 | characters = 0; |
| 2025 | for (; precision > 0; precision--) |
| 2026 | { |
| 2027 | int count = u8_strmblen (arg_end); |
| 2028 | if (count == 0) |
| 2029 | break; |
| 2030 | if (count < 0) |
| 2031 | { |
| 2032 | if (!(result == resultbuf || result == NULL)) |
| 2033 | free (result); |
| 2034 | if (buf_malloced != NULL) |
| 2035 | free (buf_malloced); |
| 2036 | CLEANUP (); |
| 2037 | errno = EILSEQ; |
| 2038 | return NULL; |
| 2039 | } |
| 2040 | arg_end += count; |
| 2041 | characters++; |
| 2042 | } |
| 2043 | } |
| 2044 | else if (has_width) |
| 2045 | { |
| 2046 | /* Use the entire string, and count the number of |
| 2047 | characters. */ |
| 2048 | arg_end = arg; |
| 2049 | characters = 0; |
| 2050 | for (;;) |
| 2051 | { |
| 2052 | int count = u8_strmblen (arg_end); |
| 2053 | if (count == 0) |
| 2054 | break; |
| 2055 | if (count < 0) |
| 2056 | { |
| 2057 | if (!(result == resultbuf || result == NULL)) |
| 2058 | free (result); |
| 2059 | if (buf_malloced != NULL) |
| 2060 | free (buf_malloced); |
| 2061 | CLEANUP (); |
| 2062 | errno = EILSEQ; |
| 2063 | return NULL; |
| 2064 | } |
| 2065 | arg_end += count; |
| 2066 | characters++; |
| 2067 | } |
| 2068 | } |
| 2069 | else |
| 2070 | { |
| 2071 | /* Use the entire string. */ |
| 2072 | arg_end = arg + u8_strlen (arg); |
| 2073 | /* The number of characters doesn't matter. */ |
| 2074 | characters = 0; |
| 2075 | } |
| 2076 | |
| 2077 | if (has_width && width > characters |
| 2078 | && !(dp->flags & FLAG_LEFT)) |
| 2079 | { |
| 2080 | size_t n = width - characters; |
| 2081 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2082 | DCHAR_SET (result + length, ' ', n); |
| 2083 | length += n; |
| 2084 | } |
| 2085 | |
| 2086 | # if DCHAR_IS_UINT8_T |
| 2087 | { |
| 2088 | size_t n = arg_end - arg; |
| 2089 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2090 | DCHAR_CPY (result + length, arg, n); |
| 2091 | length += n; |
| 2092 | } |
| 2093 | # else |
| 2094 | { /* Convert. */ |
| 2095 | DCHAR_T *converted = result + length; |
| 2096 | size_t converted_len = allocated - length; |
| 2097 | # if DCHAR_IS_TCHAR |
| 2098 | /* Convert from UTF-8 to locale encoding. */ |
| 2099 | converted = |
| 2100 | u8_conv_to_encoding (locale_charset (), |
| 2101 | iconveh_question_mark, |
| 2102 | arg, arg_end - arg, NULL, |
| 2103 | converted, &converted_len); |
| 2104 | # else |
| 2105 | /* Convert from UTF-8 to UTF-16/UTF-32. */ |
| 2106 | converted = |
| 2107 | U8_TO_DCHAR (arg, arg_end - arg, |
| 2108 | converted, &converted_len); |
| 2109 | # endif |
| 2110 | if (converted == NULL) |
| 2111 | { |
| 2112 | int saved_errno = errno; |
| 2113 | if (!(result == resultbuf || result == NULL)) |
| 2114 | free (result); |
| 2115 | if (buf_malloced != NULL) |
| 2116 | free (buf_malloced); |
| 2117 | CLEANUP (); |
| 2118 | errno = saved_errno; |
| 2119 | return NULL; |
| 2120 | } |
| 2121 | if (converted != result + length) |
| 2122 | { |
| 2123 | ENSURE_ALLOCATION (xsum (length, converted_len)); |
| 2124 | DCHAR_CPY (result + length, converted, converted_len); |
| 2125 | free (converted); |
| 2126 | } |
| 2127 | length += converted_len; |
| 2128 | } |
| 2129 | # endif |
| 2130 | |
| 2131 | if (has_width && width > characters |
| 2132 | && (dp->flags & FLAG_LEFT)) |
| 2133 | { |
| 2134 | size_t n = width - characters; |
| 2135 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2136 | DCHAR_SET (result + length, ' ', n); |
| 2137 | length += n; |
| 2138 | } |
| 2139 | } |
| 2140 | break; |
| 2141 | |
| 2142 | case TYPE_U16_STRING: |
| 2143 | { |
| 2144 | const uint16_t *arg = a.arg[dp->arg_index].a.a_u16_string; |
| 2145 | const uint16_t *arg_end; |
| 2146 | size_t characters; |
| 2147 | |
| 2148 | if (has_precision) |
| 2149 | { |
| 2150 | /* Use only PRECISION characters, from the left. */ |
| 2151 | arg_end = arg; |
| 2152 | characters = 0; |
| 2153 | for (; precision > 0; precision--) |
| 2154 | { |
| 2155 | int count = u16_strmblen (arg_end); |
| 2156 | if (count == 0) |
| 2157 | break; |
| 2158 | if (count < 0) |
| 2159 | { |
| 2160 | if (!(result == resultbuf || result == NULL)) |
| 2161 | free (result); |
| 2162 | if (buf_malloced != NULL) |
| 2163 | free (buf_malloced); |
| 2164 | CLEANUP (); |
| 2165 | errno = EILSEQ; |
| 2166 | return NULL; |
| 2167 | } |
| 2168 | arg_end += count; |
| 2169 | characters++; |
| 2170 | } |
| 2171 | } |
| 2172 | else if (has_width) |
| 2173 | { |
| 2174 | /* Use the entire string, and count the number of |
| 2175 | characters. */ |
| 2176 | arg_end = arg; |
| 2177 | characters = 0; |
| 2178 | for (;;) |
| 2179 | { |
| 2180 | int count = u16_strmblen (arg_end); |
| 2181 | if (count == 0) |
| 2182 | break; |
| 2183 | if (count < 0) |
| 2184 | { |
| 2185 | if (!(result == resultbuf || result == NULL)) |
| 2186 | free (result); |
| 2187 | if (buf_malloced != NULL) |
| 2188 | free (buf_malloced); |
| 2189 | CLEANUP (); |
| 2190 | errno = EILSEQ; |
| 2191 | return NULL; |
| 2192 | } |
| 2193 | arg_end += count; |
| 2194 | characters++; |
| 2195 | } |
| 2196 | } |
| 2197 | else |
| 2198 | { |
| 2199 | /* Use the entire string. */ |
| 2200 | arg_end = arg + u16_strlen (arg); |
| 2201 | /* The number of characters doesn't matter. */ |
| 2202 | characters = 0; |
| 2203 | } |
| 2204 | |
| 2205 | if (has_width && width > characters |
| 2206 | && !(dp->flags & FLAG_LEFT)) |
| 2207 | { |
| 2208 | size_t n = width - characters; |
| 2209 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2210 | DCHAR_SET (result + length, ' ', n); |
| 2211 | length += n; |
| 2212 | } |
| 2213 | |
| 2214 | # if DCHAR_IS_UINT16_T |
| 2215 | { |
| 2216 | size_t n = arg_end - arg; |
| 2217 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2218 | DCHAR_CPY (result + length, arg, n); |
| 2219 | length += n; |
| 2220 | } |
| 2221 | # else |
| 2222 | { /* Convert. */ |
| 2223 | DCHAR_T *converted = result + length; |
| 2224 | size_t converted_len = allocated - length; |
| 2225 | # if DCHAR_IS_TCHAR |
| 2226 | /* Convert from UTF-16 to locale encoding. */ |
| 2227 | converted = |
| 2228 | u16_conv_to_encoding (locale_charset (), |
| 2229 | iconveh_question_mark, |
| 2230 | arg, arg_end - arg, NULL, |
| 2231 | converted, &converted_len); |
| 2232 | # else |
| 2233 | /* Convert from UTF-16 to UTF-8/UTF-32. */ |
| 2234 | converted = |
| 2235 | U16_TO_DCHAR (arg, arg_end - arg, |
| 2236 | converted, &converted_len); |
| 2237 | # endif |
| 2238 | if (converted == NULL) |
| 2239 | { |
| 2240 | int saved_errno = errno; |
| 2241 | if (!(result == resultbuf || result == NULL)) |
| 2242 | free (result); |
| 2243 | if (buf_malloced != NULL) |
| 2244 | free (buf_malloced); |
| 2245 | CLEANUP (); |
| 2246 | errno = saved_errno; |
| 2247 | return NULL; |
| 2248 | } |
| 2249 | if (converted != result + length) |
| 2250 | { |
| 2251 | ENSURE_ALLOCATION (xsum (length, converted_len)); |
| 2252 | DCHAR_CPY (result + length, converted, converted_len); |
| 2253 | free (converted); |
| 2254 | } |
| 2255 | length += converted_len; |
| 2256 | } |
| 2257 | # endif |
| 2258 | |
| 2259 | if (has_width && width > characters |
| 2260 | && (dp->flags & FLAG_LEFT)) |
| 2261 | { |
| 2262 | size_t n = width - characters; |
| 2263 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2264 | DCHAR_SET (result + length, ' ', n); |
| 2265 | length += n; |
| 2266 | } |
| 2267 | } |
| 2268 | break; |
| 2269 | |
| 2270 | case TYPE_U32_STRING: |
| 2271 | { |
| 2272 | const uint32_t *arg = a.arg[dp->arg_index].a.a_u32_string; |
| 2273 | const uint32_t *arg_end; |
| 2274 | size_t characters; |
| 2275 | |
| 2276 | if (has_precision) |
| 2277 | { |
| 2278 | /* Use only PRECISION characters, from the left. */ |
| 2279 | arg_end = arg; |
| 2280 | characters = 0; |
| 2281 | for (; precision > 0; precision--) |
| 2282 | { |
| 2283 | int count = u32_strmblen (arg_end); |
| 2284 | if (count == 0) |
| 2285 | break; |
| 2286 | if (count < 0) |
| 2287 | { |
| 2288 | if (!(result == resultbuf || result == NULL)) |
| 2289 | free (result); |
| 2290 | if (buf_malloced != NULL) |
| 2291 | free (buf_malloced); |
| 2292 | CLEANUP (); |
| 2293 | errno = EILSEQ; |
| 2294 | return NULL; |
| 2295 | } |
| 2296 | arg_end += count; |
| 2297 | characters++; |
| 2298 | } |
| 2299 | } |
| 2300 | else if (has_width) |
| 2301 | { |
| 2302 | /* Use the entire string, and count the number of |
| 2303 | characters. */ |
| 2304 | arg_end = arg; |
| 2305 | characters = 0; |
| 2306 | for (;;) |
| 2307 | { |
| 2308 | int count = u32_strmblen (arg_end); |
| 2309 | if (count == 0) |
| 2310 | break; |
| 2311 | if (count < 0) |
| 2312 | { |
| 2313 | if (!(result == resultbuf || result == NULL)) |
| 2314 | free (result); |
| 2315 | if (buf_malloced != NULL) |
| 2316 | free (buf_malloced); |
| 2317 | CLEANUP (); |
| 2318 | errno = EILSEQ; |
| 2319 | return NULL; |
| 2320 | } |
| 2321 | arg_end += count; |
| 2322 | characters++; |
| 2323 | } |
| 2324 | } |
| 2325 | else |
| 2326 | { |
| 2327 | /* Use the entire string. */ |
| 2328 | arg_end = arg + u32_strlen (arg); |
| 2329 | /* The number of characters doesn't matter. */ |
| 2330 | characters = 0; |
| 2331 | } |
| 2332 | |
| 2333 | if (has_width && width > characters |
| 2334 | && !(dp->flags & FLAG_LEFT)) |
| 2335 | { |
| 2336 | size_t n = width - characters; |
| 2337 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2338 | DCHAR_SET (result + length, ' ', n); |
| 2339 | length += n; |
| 2340 | } |
| 2341 | |
| 2342 | # if DCHAR_IS_UINT32_T |
| 2343 | { |
| 2344 | size_t n = arg_end - arg; |
| 2345 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2346 | DCHAR_CPY (result + length, arg, n); |
| 2347 | length += n; |
| 2348 | } |
| 2349 | # else |
| 2350 | { /* Convert. */ |
| 2351 | DCHAR_T *converted = result + length; |
| 2352 | size_t converted_len = allocated - length; |
| 2353 | # if DCHAR_IS_TCHAR |
| 2354 | /* Convert from UTF-32 to locale encoding. */ |
| 2355 | converted = |
| 2356 | u32_conv_to_encoding (locale_charset (), |
| 2357 | iconveh_question_mark, |
| 2358 | arg, arg_end - arg, NULL, |
| 2359 | converted, &converted_len); |
| 2360 | # else |
| 2361 | /* Convert from UTF-32 to UTF-8/UTF-16. */ |
| 2362 | converted = |
| 2363 | U32_TO_DCHAR (arg, arg_end - arg, |
| 2364 | converted, &converted_len); |
| 2365 | # endif |
| 2366 | if (converted == NULL) |
| 2367 | { |
| 2368 | int saved_errno = errno; |
| 2369 | if (!(result == resultbuf || result == NULL)) |
| 2370 | free (result); |
| 2371 | if (buf_malloced != NULL) |
| 2372 | free (buf_malloced); |
| 2373 | CLEANUP (); |
| 2374 | errno = saved_errno; |
| 2375 | return NULL; |
| 2376 | } |
| 2377 | if (converted != result + length) |
| 2378 | { |
| 2379 | ENSURE_ALLOCATION (xsum (length, converted_len)); |
| 2380 | DCHAR_CPY (result + length, converted, converted_len); |
| 2381 | free (converted); |
| 2382 | } |
| 2383 | length += converted_len; |
| 2384 | } |
| 2385 | # endif |
| 2386 | |
| 2387 | if (has_width && width > characters |
| 2388 | && (dp->flags & FLAG_LEFT)) |
| 2389 | { |
| 2390 | size_t n = width - characters; |
| 2391 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2392 | DCHAR_SET (result + length, ' ', n); |
| 2393 | length += n; |
| 2394 | } |
| 2395 | } |
| 2396 | break; |
| 2397 | |
| 2398 | default: |
| 2399 | abort (); |
| 2400 | } |
| 2401 | } |
| 2402 | #endif |
| 2403 | #if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && HAVE_WCHAR_T |
| 2404 | else if (dp->conversion == 's' |
| 2405 | # if WIDE_CHAR_VERSION |
| 2406 | && a.arg[dp->arg_index].type != TYPE_WIDE_STRING |
| 2407 | # else |
| 2408 | && a.arg[dp->arg_index].type == TYPE_WIDE_STRING |
| 2409 | # endif |
| 2410 | ) |
| 2411 | { |
| 2412 | /* The normal handling of the 's' directive below requires |
| 2413 | allocating a temporary buffer. The determination of its |
| 2414 | length (tmp_length), in the case when a precision is |
| 2415 | specified, below requires a conversion between a char[] |
| 2416 | string and a wchar_t[] wide string. It could be done, but |
| 2417 | we have no guarantee that the implementation of sprintf will |
| 2418 | use the exactly same algorithm. Without this guarantee, it |
| 2419 | is possible to have buffer overrun bugs. In order to avoid |
| 2420 | such bugs, we implement the entire processing of the 's' |
| 2421 | directive ourselves. */ |
| 2422 | int flags = dp->flags; |
| 2423 | int has_width; |
| 2424 | size_t width; |
| 2425 | int has_precision; |
| 2426 | size_t precision; |
| 2427 | |
| 2428 | has_width = 0; |
| 2429 | width = 0; |
| 2430 | if (dp->width_start != dp->width_end) |
| 2431 | { |
| 2432 | if (dp->width_arg_index != ARG_NONE) |
| 2433 | { |
| 2434 | int arg; |
| 2435 | |
| 2436 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 2437 | abort (); |
| 2438 | arg = a.arg[dp->width_arg_index].a.a_int; |
| 2439 | if (arg < 0) |
| 2440 | { |
| 2441 | /* "A negative field width is taken as a '-' flag |
| 2442 | followed by a positive field width." */ |
| 2443 | flags |= FLAG_LEFT; |
| 2444 | width = (unsigned int) (-arg); |
| 2445 | } |
| 2446 | else |
| 2447 | width = arg; |
| 2448 | } |
| 2449 | else |
| 2450 | { |
| 2451 | const FCHAR_T *digitp = dp->width_start; |
| 2452 | |
| 2453 | do |
| 2454 | width = xsum (xtimes (width, 10), *digitp++ - '0'); |
| 2455 | while (digitp != dp->width_end); |
| 2456 | } |
| 2457 | has_width = 1; |
| 2458 | } |
| 2459 | |
| 2460 | has_precision = 0; |
| 2461 | precision = 6; |
| 2462 | if (dp->precision_start != dp->precision_end) |
| 2463 | { |
| 2464 | if (dp->precision_arg_index != ARG_NONE) |
| 2465 | { |
| 2466 | int arg; |
| 2467 | |
| 2468 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 2469 | abort (); |
| 2470 | arg = a.arg[dp->precision_arg_index].a.a_int; |
| 2471 | /* "A negative precision is taken as if the precision |
| 2472 | were omitted." */ |
| 2473 | if (arg >= 0) |
| 2474 | { |
| 2475 | precision = arg; |
| 2476 | has_precision = 1; |
| 2477 | } |
| 2478 | } |
| 2479 | else |
| 2480 | { |
| 2481 | const FCHAR_T *digitp = dp->precision_start + 1; |
| 2482 | |
| 2483 | precision = 0; |
| 2484 | while (digitp != dp->precision_end) |
| 2485 | precision = xsum (xtimes (precision, 10), *digitp++ - '0'); |
| 2486 | has_precision = 1; |
| 2487 | } |
| 2488 | } |
| 2489 | |
| 2490 | # if WIDE_CHAR_VERSION |
| 2491 | /* %s in vasnwprintf. See the specification of fwprintf. */ |
| 2492 | { |
| 2493 | const char *arg = a.arg[dp->arg_index].a.a_string; |
| 2494 | const char *arg_end; |
| 2495 | size_t characters; |
| 2496 | |
| 2497 | if (has_precision) |
| 2498 | { |
| 2499 | /* Use only as many bytes as needed to produce PRECISION |
| 2500 | wide characters, from the left. */ |
| 2501 | # if HAVE_MBRTOWC |
| 2502 | mbstate_t state; |
| 2503 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2504 | # endif |
| 2505 | arg_end = arg; |
| 2506 | characters = 0; |
| 2507 | for (; precision > 0; precision--) |
| 2508 | { |
| 2509 | int count; |
| 2510 | # if HAVE_MBRTOWC |
| 2511 | count = mbrlen (arg_end, MB_CUR_MAX, &state); |
| 2512 | # else |
| 2513 | count = mblen (arg_end, MB_CUR_MAX); |
| 2514 | # endif |
| 2515 | if (count == 0) |
| 2516 | /* Found the terminating NUL. */ |
| 2517 | break; |
| 2518 | if (count < 0) |
| 2519 | { |
| 2520 | /* Invalid or incomplete multibyte character. */ |
| 2521 | if (!(result == resultbuf || result == NULL)) |
| 2522 | free (result); |
| 2523 | if (buf_malloced != NULL) |
| 2524 | free (buf_malloced); |
| 2525 | CLEANUP (); |
| 2526 | errno = EILSEQ; |
| 2527 | return NULL; |
| 2528 | } |
| 2529 | arg_end += count; |
| 2530 | characters++; |
| 2531 | } |
| 2532 | } |
| 2533 | else if (has_width) |
| 2534 | { |
| 2535 | /* Use the entire string, and count the number of wide |
| 2536 | characters. */ |
| 2537 | # if HAVE_MBRTOWC |
| 2538 | mbstate_t state; |
| 2539 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2540 | # endif |
| 2541 | arg_end = arg; |
| 2542 | characters = 0; |
| 2543 | for (;;) |
| 2544 | { |
| 2545 | int count; |
| 2546 | # if HAVE_MBRTOWC |
| 2547 | count = mbrlen (arg_end, MB_CUR_MAX, &state); |
| 2548 | # else |
| 2549 | count = mblen (arg_end, MB_CUR_MAX); |
| 2550 | # endif |
| 2551 | if (count == 0) |
| 2552 | /* Found the terminating NUL. */ |
| 2553 | break; |
| 2554 | if (count < 0) |
| 2555 | { |
| 2556 | /* Invalid or incomplete multibyte character. */ |
| 2557 | if (!(result == resultbuf || result == NULL)) |
| 2558 | free (result); |
| 2559 | if (buf_malloced != NULL) |
| 2560 | free (buf_malloced); |
| 2561 | CLEANUP (); |
| 2562 | errno = EILSEQ; |
| 2563 | return NULL; |
| 2564 | } |
| 2565 | arg_end += count; |
| 2566 | characters++; |
| 2567 | } |
| 2568 | } |
| 2569 | else |
| 2570 | { |
| 2571 | /* Use the entire string. */ |
| 2572 | arg_end = arg + strlen (arg); |
| 2573 | /* The number of characters doesn't matter. */ |
| 2574 | characters = 0; |
| 2575 | } |
| 2576 | |
| 2577 | if (has_width && width > characters |
| 2578 | && !(dp->flags & FLAG_LEFT)) |
| 2579 | { |
| 2580 | size_t n = width - characters; |
| 2581 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2582 | DCHAR_SET (result + length, ' ', n); |
| 2583 | length += n; |
| 2584 | } |
| 2585 | |
| 2586 | if (has_precision || has_width) |
| 2587 | { |
| 2588 | /* We know the number of wide characters in advance. */ |
| 2589 | size_t remaining; |
| 2590 | # if HAVE_MBRTOWC |
| 2591 | mbstate_t state; |
| 2592 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2593 | # endif |
| 2594 | ENSURE_ALLOCATION (xsum (length, characters)); |
| 2595 | for (remaining = characters; remaining > 0; remaining--) |
| 2596 | { |
| 2597 | wchar_t wc; |
| 2598 | int count; |
| 2599 | # if HAVE_MBRTOWC |
| 2600 | count = mbrtowc (&wc, arg, arg_end - arg, &state); |
| 2601 | # else |
| 2602 | count = mbtowc (&wc, arg, arg_end - arg); |
| 2603 | # endif |
| 2604 | if (count <= 0) |
| 2605 | /* mbrtowc not consistent with mbrlen, or mbtowc |
| 2606 | not consistent with mblen. */ |
| 2607 | abort (); |
| 2608 | result[length++] = wc; |
| 2609 | arg += count; |
| 2610 | } |
| 2611 | if (!(arg == arg_end)) |
| 2612 | abort (); |
| 2613 | } |
| 2614 | else |
| 2615 | { |
| 2616 | # if HAVE_MBRTOWC |
| 2617 | mbstate_t state; |
| 2618 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2619 | # endif |
| 2620 | while (arg < arg_end) |
| 2621 | { |
| 2622 | wchar_t wc; |
| 2623 | int count; |
| 2624 | # if HAVE_MBRTOWC |
| 2625 | count = mbrtowc (&wc, arg, arg_end - arg, &state); |
| 2626 | # else |
| 2627 | count = mbtowc (&wc, arg, arg_end - arg); |
| 2628 | # endif |
| 2629 | if (count <= 0) |
| 2630 | /* mbrtowc not consistent with mbrlen, or mbtowc |
| 2631 | not consistent with mblen. */ |
| 2632 | abort (); |
| 2633 | ENSURE_ALLOCATION (xsum (length, 1)); |
| 2634 | result[length++] = wc; |
| 2635 | arg += count; |
| 2636 | } |
| 2637 | } |
| 2638 | |
| 2639 | if (has_width && width > characters |
| 2640 | && (dp->flags & FLAG_LEFT)) |
| 2641 | { |
| 2642 | size_t n = width - characters; |
| 2643 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2644 | DCHAR_SET (result + length, ' ', n); |
| 2645 | length += n; |
| 2646 | } |
| 2647 | } |
| 2648 | # else |
| 2649 | /* %ls in vasnprintf. See the specification of fprintf. */ |
| 2650 | { |
| 2651 | const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string; |
| 2652 | const wchar_t *arg_end; |
| 2653 | size_t characters; |
| 2654 | # if !DCHAR_IS_TCHAR |
| 2655 | /* This code assumes that TCHAR_T is 'char'. */ |
| 2656 | verify (sizeof (TCHAR_T) == 1); |
| 2657 | TCHAR_T *tmpsrc; |
| 2658 | DCHAR_T *tmpdst; |
| 2659 | size_t tmpdst_len; |
| 2660 | # endif |
| 2661 | size_t w; |
| 2662 | |
| 2663 | if (has_precision) |
| 2664 | { |
| 2665 | /* Use only as many wide characters as needed to produce |
| 2666 | at most PRECISION bytes, from the left. */ |
| 2667 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2668 | mbstate_t state; |
| 2669 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2670 | # endif |
| 2671 | arg_end = arg; |
| 2672 | characters = 0; |
| 2673 | while (precision > 0) |
| 2674 | { |
| 2675 | char cbuf[64]; /* Assume MB_CUR_MAX <= 64. */ |
| 2676 | int count; |
| 2677 | |
| 2678 | if (*arg_end == 0) |
| 2679 | /* Found the terminating null wide character. */ |
| 2680 | break; |
| 2681 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2682 | count = wcrtomb (cbuf, *arg_end, &state); |
| 2683 | # else |
| 2684 | count = wctomb (cbuf, *arg_end); |
| 2685 | # endif |
| 2686 | if (count < 0) |
| 2687 | { |
| 2688 | /* Cannot convert. */ |
| 2689 | if (!(result == resultbuf || result == NULL)) |
| 2690 | free (result); |
| 2691 | if (buf_malloced != NULL) |
| 2692 | free (buf_malloced); |
| 2693 | CLEANUP (); |
| 2694 | errno = EILSEQ; |
| 2695 | return NULL; |
| 2696 | } |
| 2697 | if (precision < count) |
| 2698 | break; |
| 2699 | arg_end++; |
| 2700 | characters += count; |
| 2701 | precision -= count; |
| 2702 | } |
| 2703 | } |
| 2704 | # if DCHAR_IS_TCHAR |
| 2705 | else if (has_width) |
| 2706 | # else |
| 2707 | else |
| 2708 | # endif |
| 2709 | { |
| 2710 | /* Use the entire string, and count the number of |
| 2711 | bytes. */ |
| 2712 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2713 | mbstate_t state; |
| 2714 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2715 | # endif |
| 2716 | arg_end = arg; |
| 2717 | characters = 0; |
| 2718 | for (;;) |
| 2719 | { |
| 2720 | char cbuf[64]; /* Assume MB_CUR_MAX <= 64. */ |
| 2721 | int count; |
| 2722 | |
| 2723 | if (*arg_end == 0) |
| 2724 | /* Found the terminating null wide character. */ |
| 2725 | break; |
| 2726 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2727 | count = wcrtomb (cbuf, *arg_end, &state); |
| 2728 | # else |
| 2729 | count = wctomb (cbuf, *arg_end); |
| 2730 | # endif |
| 2731 | if (count < 0) |
| 2732 | { |
| 2733 | /* Cannot convert. */ |
| 2734 | if (!(result == resultbuf || result == NULL)) |
| 2735 | free (result); |
| 2736 | if (buf_malloced != NULL) |
| 2737 | free (buf_malloced); |
| 2738 | CLEANUP (); |
| 2739 | errno = EILSEQ; |
| 2740 | return NULL; |
| 2741 | } |
| 2742 | arg_end++; |
| 2743 | characters += count; |
| 2744 | } |
| 2745 | } |
| 2746 | # if DCHAR_IS_TCHAR |
| 2747 | else |
| 2748 | { |
| 2749 | /* Use the entire string. */ |
| 2750 | arg_end = arg + local_wcslen (arg); |
| 2751 | /* The number of bytes doesn't matter. */ |
| 2752 | characters = 0; |
| 2753 | } |
| 2754 | # endif |
| 2755 | |
| 2756 | # if !DCHAR_IS_TCHAR |
| 2757 | /* Convert the string into a piece of temporary memory. */ |
| 2758 | tmpsrc = (TCHAR_T *) malloc (characters * sizeof (TCHAR_T)); |
| 2759 | if (tmpsrc == NULL) |
| 2760 | goto out_of_memory; |
| 2761 | { |
| 2762 | TCHAR_T *tmpptr = tmpsrc; |
| 2763 | size_t remaining; |
| 2764 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2765 | mbstate_t state; |
| 2766 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2767 | # endif |
| 2768 | for (remaining = characters; remaining > 0; ) |
| 2769 | { |
| 2770 | char cbuf[64]; /* Assume MB_CUR_MAX <= 64. */ |
| 2771 | int count; |
| 2772 | |
| 2773 | if (*arg == 0) |
| 2774 | abort (); |
| 2775 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2776 | count = wcrtomb (cbuf, *arg, &state); |
| 2777 | # else |
| 2778 | count = wctomb (cbuf, *arg); |
| 2779 | # endif |
| 2780 | if (count <= 0) |
| 2781 | /* Inconsistency. */ |
| 2782 | abort (); |
| 2783 | memcpy (tmpptr, cbuf, count); |
| 2784 | tmpptr += count; |
| 2785 | arg++; |
| 2786 | remaining -= count; |
| 2787 | } |
| 2788 | if (!(arg == arg_end)) |
| 2789 | abort (); |
| 2790 | } |
| 2791 | |
| 2792 | /* Convert from TCHAR_T[] to DCHAR_T[]. */ |
| 2793 | tmpdst = |
| 2794 | DCHAR_CONV_FROM_ENCODING (locale_charset (), |
| 2795 | iconveh_question_mark, |
| 2796 | tmpsrc, characters, |
| 2797 | NULL, |
| 2798 | NULL, &tmpdst_len); |
| 2799 | if (tmpdst == NULL) |
| 2800 | { |
| 2801 | int saved_errno = errno; |
| 2802 | free (tmpsrc); |
| 2803 | if (!(result == resultbuf || result == NULL)) |
| 2804 | free (result); |
| 2805 | if (buf_malloced != NULL) |
| 2806 | free (buf_malloced); |
| 2807 | CLEANUP (); |
| 2808 | errno = saved_errno; |
| 2809 | return NULL; |
| 2810 | } |
| 2811 | free (tmpsrc); |
| 2812 | # endif |
| 2813 | |
| 2814 | if (has_width) |
| 2815 | { |
| 2816 | # if ENABLE_UNISTDIO |
| 2817 | /* Outside POSIX, it's preferrable to compare the width |
| 2818 | against the number of _characters_ of the converted |
| 2819 | value. */ |
| 2820 | w = DCHAR_MBSNLEN (result + length, characters); |
| 2821 | # else |
| 2822 | /* The width is compared against the number of _bytes_ |
| 2823 | of the converted value, says POSIX. */ |
| 2824 | w = characters; |
| 2825 | # endif |
| 2826 | } |
| 2827 | else |
| 2828 | /* w doesn't matter. */ |
| 2829 | w = 0; |
| 2830 | |
| 2831 | if (has_width && width > w |
| 2832 | && !(dp->flags & FLAG_LEFT)) |
| 2833 | { |
| 2834 | size_t n = width - w; |
| 2835 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2836 | DCHAR_SET (result + length, ' ', n); |
| 2837 | length += n; |
| 2838 | } |
| 2839 | |
| 2840 | # if DCHAR_IS_TCHAR |
| 2841 | if (has_precision || has_width) |
| 2842 | { |
| 2843 | /* We know the number of bytes in advance. */ |
| 2844 | size_t remaining; |
| 2845 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2846 | mbstate_t state; |
| 2847 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2848 | # endif |
| 2849 | ENSURE_ALLOCATION (xsum (length, characters)); |
| 2850 | for (remaining = characters; remaining > 0; ) |
| 2851 | { |
| 2852 | char cbuf[64]; /* Assume MB_CUR_MAX <= 64. */ |
| 2853 | int count; |
| 2854 | |
| 2855 | if (*arg == 0) |
| 2856 | abort (); |
| 2857 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2858 | count = wcrtomb (cbuf, *arg, &state); |
| 2859 | # else |
| 2860 | count = wctomb (cbuf, *arg); |
| 2861 | # endif |
| 2862 | if (count <= 0) |
| 2863 | /* Inconsistency. */ |
| 2864 | abort (); |
| 2865 | memcpy (result + length, cbuf, count); |
| 2866 | length += count; |
| 2867 | arg++; |
| 2868 | remaining -= count; |
| 2869 | } |
| 2870 | if (!(arg == arg_end)) |
| 2871 | abort (); |
| 2872 | } |
| 2873 | else |
| 2874 | { |
| 2875 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2876 | mbstate_t state; |
| 2877 | memset (&state, '\0', sizeof (mbstate_t)); |
| 2878 | # endif |
| 2879 | while (arg < arg_end) |
| 2880 | { |
| 2881 | char cbuf[64]; /* Assume MB_CUR_MAX <= 64. */ |
| 2882 | int count; |
| 2883 | |
| 2884 | if (*arg == 0) |
| 2885 | abort (); |
| 2886 | # if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t |
| 2887 | count = wcrtomb (cbuf, *arg, &state); |
| 2888 | # else |
| 2889 | count = wctomb (cbuf, *arg); |
| 2890 | # endif |
| 2891 | if (count <= 0) |
| 2892 | { |
| 2893 | /* Cannot convert. */ |
| 2894 | if (!(result == resultbuf || result == NULL)) |
| 2895 | free (result); |
| 2896 | if (buf_malloced != NULL) |
| 2897 | free (buf_malloced); |
| 2898 | CLEANUP (); |
| 2899 | errno = EILSEQ; |
| 2900 | return NULL; |
| 2901 | } |
| 2902 | ENSURE_ALLOCATION (xsum (length, count)); |
| 2903 | memcpy (result + length, cbuf, count); |
| 2904 | length += count; |
| 2905 | arg++; |
| 2906 | } |
| 2907 | } |
| 2908 | # else |
| 2909 | ENSURE_ALLOCATION (xsum (length, tmpdst_len)); |
| 2910 | DCHAR_CPY (result + length, tmpdst, tmpdst_len); |
| 2911 | free (tmpdst); |
| 2912 | length += tmpdst_len; |
| 2913 | # endif |
| 2914 | |
| 2915 | if (has_width && width > w |
| 2916 | && (dp->flags & FLAG_LEFT)) |
| 2917 | { |
| 2918 | size_t n = width - w; |
| 2919 | ENSURE_ALLOCATION (xsum (length, n)); |
| 2920 | DCHAR_SET (result + length, ' ', n); |
| 2921 | length += n; |
| 2922 | } |
| 2923 | } |
| 2924 | # endif |
| 2925 | } |
| 2926 | #endif |
| 2927 | #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL |
| 2928 | else if ((dp->conversion == 'a' || dp->conversion == 'A') |
| 2929 | # if !(NEED_PRINTF_DIRECTIVE_A || (NEED_PRINTF_LONG_DOUBLE && NEED_PRINTF_DOUBLE)) |
| 2930 | && (0 |
| 2931 | # if NEED_PRINTF_DOUBLE |
| 2932 | || a.arg[dp->arg_index].type == TYPE_DOUBLE |
| 2933 | # endif |
| 2934 | # if NEED_PRINTF_LONG_DOUBLE |
| 2935 | || a.arg[dp->arg_index].type == TYPE_LONGDOUBLE |
| 2936 | # endif |
| 2937 | ) |
| 2938 | # endif |
| 2939 | ) |
| 2940 | { |
| 2941 | arg_type type = a.arg[dp->arg_index].type; |
| 2942 | int flags = dp->flags; |
| 2943 | int has_width; |
| 2944 | size_t width; |
| 2945 | int has_precision; |
| 2946 | size_t precision; |
| 2947 | size_t tmp_length; |
| 2948 | DCHAR_T tmpbuf[700]; |
| 2949 | DCHAR_T *tmp; |
| 2950 | DCHAR_T *pad_ptr; |
| 2951 | DCHAR_T *p; |
| 2952 | |
| 2953 | has_width = 0; |
| 2954 | width = 0; |
| 2955 | if (dp->width_start != dp->width_end) |
| 2956 | { |
| 2957 | if (dp->width_arg_index != ARG_NONE) |
| 2958 | { |
| 2959 | int arg; |
| 2960 | |
| 2961 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 2962 | abort (); |
| 2963 | arg = a.arg[dp->width_arg_index].a.a_int; |
| 2964 | if (arg < 0) |
| 2965 | { |
| 2966 | /* "A negative field width is taken as a '-' flag |
| 2967 | followed by a positive field width." */ |
| 2968 | flags |= FLAG_LEFT; |
| 2969 | width = (unsigned int) (-arg); |
| 2970 | } |
| 2971 | else |
| 2972 | width = arg; |
| 2973 | } |
| 2974 | else |
| 2975 | { |
| 2976 | const FCHAR_T *digitp = dp->width_start; |
| 2977 | |
| 2978 | do |
| 2979 | width = xsum (xtimes (width, 10), *digitp++ - '0'); |
| 2980 | while (digitp != dp->width_end); |
| 2981 | } |
| 2982 | has_width = 1; |
| 2983 | } |
| 2984 | |
| 2985 | has_precision = 0; |
| 2986 | precision = 0; |
| 2987 | if (dp->precision_start != dp->precision_end) |
| 2988 | { |
| 2989 | if (dp->precision_arg_index != ARG_NONE) |
| 2990 | { |
| 2991 | int arg; |
| 2992 | |
| 2993 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 2994 | abort (); |
| 2995 | arg = a.arg[dp->precision_arg_index].a.a_int; |
| 2996 | /* "A negative precision is taken as if the precision |
| 2997 | were omitted." */ |
| 2998 | if (arg >= 0) |
| 2999 | { |
| 3000 | precision = arg; |
| 3001 | has_precision = 1; |
| 3002 | } |
| 3003 | } |
| 3004 | else |
| 3005 | { |
| 3006 | const FCHAR_T *digitp = dp->precision_start + 1; |
| 3007 | |
| 3008 | precision = 0; |
| 3009 | while (digitp != dp->precision_end) |
| 3010 | precision = xsum (xtimes (precision, 10), *digitp++ - '0'); |
| 3011 | has_precision = 1; |
| 3012 | } |
| 3013 | } |
| 3014 | |
| 3015 | /* Allocate a temporary buffer of sufficient size. */ |
| 3016 | if (type == TYPE_LONGDOUBLE) |
| 3017 | tmp_length = |
| 3018 | (unsigned int) ((LDBL_DIG + 1) |
| 3019 | * 0.831 /* decimal -> hexadecimal */ |
| 3020 | ) |
| 3021 | + 1; /* turn floor into ceil */ |
| 3022 | else |
| 3023 | tmp_length = |
| 3024 | (unsigned int) ((DBL_DIG + 1) |
| 3025 | * 0.831 /* decimal -> hexadecimal */ |
| 3026 | ) |
| 3027 | + 1; /* turn floor into ceil */ |
| 3028 | if (tmp_length < precision) |
| 3029 | tmp_length = precision; |
| 3030 | /* Account for sign, decimal point etc. */ |
| 3031 | tmp_length = xsum (tmp_length, 12); |
| 3032 | |
| 3033 | if (tmp_length < width) |
| 3034 | tmp_length = width; |
| 3035 | |
| 3036 | tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */ |
| 3037 | |
| 3038 | if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T)) |
| 3039 | tmp = tmpbuf; |
| 3040 | else |
| 3041 | { |
| 3042 | size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T)); |
| 3043 | |
| 3044 | if (size_overflow_p (tmp_memsize)) |
| 3045 | /* Overflow, would lead to out of memory. */ |
| 3046 | goto out_of_memory; |
| 3047 | tmp = (DCHAR_T *) malloc (tmp_memsize); |
| 3048 | if (tmp == NULL) |
| 3049 | /* Out of memory. */ |
| 3050 | goto out_of_memory; |
| 3051 | } |
| 3052 | |
| 3053 | pad_ptr = NULL; |
| 3054 | p = tmp; |
| 3055 | if (type == TYPE_LONGDOUBLE) |
| 3056 | { |
| 3057 | # if NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE |
| 3058 | long double arg = a.arg[dp->arg_index].a.a_longdouble; |
| 3059 | |
| 3060 | if (isnanl (arg)) |
| 3061 | { |
| 3062 | if (dp->conversion == 'A') |
| 3063 | { |
| 3064 | *p++ = 'N'; *p++ = 'A'; *p++ = 'N'; |
| 3065 | } |
| 3066 | else |
| 3067 | { |
| 3068 | *p++ = 'n'; *p++ = 'a'; *p++ = 'n'; |
| 3069 | } |
| 3070 | } |
| 3071 | else |
| 3072 | { |
| 3073 | int sign = 0; |
| 3074 | DECL_LONG_DOUBLE_ROUNDING |
| 3075 | |
| 3076 | BEGIN_LONG_DOUBLE_ROUNDING (); |
| 3077 | |
| 3078 | if (signbit (arg)) /* arg < 0.0L or negative zero */ |
| 3079 | { |
| 3080 | sign = -1; |
| 3081 | arg = -arg; |
| 3082 | } |
| 3083 | |
| 3084 | if (sign < 0) |
| 3085 | *p++ = '-'; |
| 3086 | else if (flags & FLAG_SHOWSIGN) |
| 3087 | *p++ = '+'; |
| 3088 | else if (flags & FLAG_SPACE) |
| 3089 | *p++ = ' '; |
| 3090 | |
| 3091 | if (arg > 0.0L && arg + arg == arg) |
| 3092 | { |
| 3093 | if (dp->conversion == 'A') |
| 3094 | { |
| 3095 | *p++ = 'I'; *p++ = 'N'; *p++ = 'F'; |
| 3096 | } |
| 3097 | else |
| 3098 | { |
| 3099 | *p++ = 'i'; *p++ = 'n'; *p++ = 'f'; |
| 3100 | } |
| 3101 | } |
| 3102 | else |
| 3103 | { |
| 3104 | int exponent; |
| 3105 | long double mantissa; |
| 3106 | |
| 3107 | if (arg > 0.0L) |
| 3108 | mantissa = printf_frexpl (arg, &exponent); |
| 3109 | else |
| 3110 | { |
| 3111 | exponent = 0; |
| 3112 | mantissa = 0.0L; |
| 3113 | } |
| 3114 | |
| 3115 | if (has_precision |
| 3116 | && precision < (unsigned int) ((LDBL_DIG + 1) * 0.831) + 1) |
| 3117 | { |
| 3118 | /* Round the mantissa. */ |
| 3119 | long double tail = mantissa; |
| 3120 | size_t q; |
| 3121 | |
| 3122 | for (q = precision; ; q--) |
| 3123 | { |
| 3124 | int digit = (int) tail; |
| 3125 | tail -= digit; |
| 3126 | if (q == 0) |
| 3127 | { |
| 3128 | if (digit & 1 ? tail >= 0.5L : tail > 0.5L) |
| 3129 | tail = 1 - tail; |
| 3130 | else |
| 3131 | tail = - tail; |
| 3132 | break; |
| 3133 | } |
| 3134 | tail *= 16.0L; |
| 3135 | } |
| 3136 | if (tail != 0.0L) |
| 3137 | for (q = precision; q > 0; q--) |
| 3138 | tail *= 0.0625L; |
| 3139 | mantissa += tail; |
| 3140 | } |
| 3141 | |
| 3142 | *p++ = '0'; |
| 3143 | *p++ = dp->conversion - 'A' + 'X'; |
| 3144 | pad_ptr = p; |
| 3145 | { |
| 3146 | int digit; |
| 3147 | |
| 3148 | digit = (int) mantissa; |
| 3149 | mantissa -= digit; |
| 3150 | *p++ = '0' + digit; |
| 3151 | if ((flags & FLAG_ALT) |
| 3152 | || mantissa > 0.0L || precision > 0) |
| 3153 | { |
| 3154 | *p++ = decimal_point_char (); |
| 3155 | /* This loop terminates because we assume |
| 3156 | that FLT_RADIX is a power of 2. */ |
| 3157 | while (mantissa > 0.0L) |
| 3158 | { |
| 3159 | mantissa *= 16.0L; |
| 3160 | digit = (int) mantissa; |
| 3161 | mantissa -= digit; |
| 3162 | *p++ = digit |
| 3163 | + (digit < 10 |
| 3164 | ? '0' |
| 3165 | : dp->conversion - 10); |
| 3166 | if (precision > 0) |
| 3167 | precision--; |
| 3168 | } |
| 3169 | while (precision > 0) |
| 3170 | { |
| 3171 | *p++ = '0'; |
| 3172 | precision--; |
| 3173 | } |
| 3174 | } |
| 3175 | } |
| 3176 | *p++ = dp->conversion - 'A' + 'P'; |
| 3177 | # if WIDE_CHAR_VERSION |
| 3178 | { |
| 3179 | static const wchar_t decimal_format[] = |
| 3180 | { '%', '+', 'd', '\0' }; |
| 3181 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 3182 | } |
| 3183 | while (*p != '\0') |
| 3184 | p++; |
| 3185 | # else |
| 3186 | if (sizeof (DCHAR_T) == 1) |
| 3187 | { |
| 3188 | sprintf ((char *) p, "%+d", exponent); |
| 3189 | while (*p != '\0') |
| 3190 | p++; |
| 3191 | } |
| 3192 | else |
| 3193 | { |
| 3194 | char expbuf[6 + 1]; |
| 3195 | const char *ep; |
| 3196 | sprintf (expbuf, "%+d", exponent); |
| 3197 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 3198 | p++; |
| 3199 | } |
| 3200 | # endif |
| 3201 | } |
| 3202 | |
| 3203 | END_LONG_DOUBLE_ROUNDING (); |
| 3204 | } |
| 3205 | # else |
| 3206 | abort (); |
| 3207 | # endif |
| 3208 | } |
| 3209 | else |
| 3210 | { |
| 3211 | # if NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_DOUBLE |
| 3212 | double arg = a.arg[dp->arg_index].a.a_double; |
| 3213 | |
| 3214 | if (isnand (arg)) |
| 3215 | { |
| 3216 | if (dp->conversion == 'A') |
| 3217 | { |
| 3218 | *p++ = 'N'; *p++ = 'A'; *p++ = 'N'; |
| 3219 | } |
| 3220 | else |
| 3221 | { |
| 3222 | *p++ = 'n'; *p++ = 'a'; *p++ = 'n'; |
| 3223 | } |
| 3224 | } |
| 3225 | else |
| 3226 | { |
| 3227 | int sign = 0; |
| 3228 | |
| 3229 | if (signbit (arg)) /* arg < 0.0 or negative zero */ |
| 3230 | { |
| 3231 | sign = -1; |
| 3232 | arg = -arg; |
| 3233 | } |
| 3234 | |
| 3235 | if (sign < 0) |
| 3236 | *p++ = '-'; |
| 3237 | else if (flags & FLAG_SHOWSIGN) |
| 3238 | *p++ = '+'; |
| 3239 | else if (flags & FLAG_SPACE) |
| 3240 | *p++ = ' '; |
| 3241 | |
| 3242 | if (arg > 0.0 && arg + arg == arg) |
| 3243 | { |
| 3244 | if (dp->conversion == 'A') |
| 3245 | { |
| 3246 | *p++ = 'I'; *p++ = 'N'; *p++ = 'F'; |
| 3247 | } |
| 3248 | else |
| 3249 | { |
| 3250 | *p++ = 'i'; *p++ = 'n'; *p++ = 'f'; |
| 3251 | } |
| 3252 | } |
| 3253 | else |
| 3254 | { |
| 3255 | int exponent; |
| 3256 | double mantissa; |
| 3257 | |
| 3258 | if (arg > 0.0) |
| 3259 | mantissa = printf_frexp (arg, &exponent); |
| 3260 | else |
| 3261 | { |
| 3262 | exponent = 0; |
| 3263 | mantissa = 0.0; |
| 3264 | } |
| 3265 | |
| 3266 | if (has_precision |
| 3267 | && precision < (unsigned int) ((DBL_DIG + 1) * 0.831) + 1) |
| 3268 | { |
| 3269 | /* Round the mantissa. */ |
| 3270 | double tail = mantissa; |
| 3271 | size_t q; |
| 3272 | |
| 3273 | for (q = precision; ; q--) |
| 3274 | { |
| 3275 | int digit = (int) tail; |
| 3276 | tail -= digit; |
| 3277 | if (q == 0) |
| 3278 | { |
| 3279 | if (digit & 1 ? tail >= 0.5 : tail > 0.5) |
| 3280 | tail = 1 - tail; |
| 3281 | else |
| 3282 | tail = - tail; |
| 3283 | break; |
| 3284 | } |
| 3285 | tail *= 16.0; |
| 3286 | } |
| 3287 | if (tail != 0.0) |
| 3288 | for (q = precision; q > 0; q--) |
| 3289 | tail *= 0.0625; |
| 3290 | mantissa += tail; |
| 3291 | } |
| 3292 | |
| 3293 | *p++ = '0'; |
| 3294 | *p++ = dp->conversion - 'A' + 'X'; |
| 3295 | pad_ptr = p; |
| 3296 | { |
| 3297 | int digit; |
| 3298 | |
| 3299 | digit = (int) mantissa; |
| 3300 | mantissa -= digit; |
| 3301 | *p++ = '0' + digit; |
| 3302 | if ((flags & FLAG_ALT) |
| 3303 | || mantissa > 0.0 || precision > 0) |
| 3304 | { |
| 3305 | *p++ = decimal_point_char (); |
| 3306 | /* This loop terminates because we assume |
| 3307 | that FLT_RADIX is a power of 2. */ |
| 3308 | while (mantissa > 0.0) |
| 3309 | { |
| 3310 | mantissa *= 16.0; |
| 3311 | digit = (int) mantissa; |
| 3312 | mantissa -= digit; |
| 3313 | *p++ = digit |
| 3314 | + (digit < 10 |
| 3315 | ? '0' |
| 3316 | : dp->conversion - 10); |
| 3317 | if (precision > 0) |
| 3318 | precision--; |
| 3319 | } |
| 3320 | while (precision > 0) |
| 3321 | { |
| 3322 | *p++ = '0'; |
| 3323 | precision--; |
| 3324 | } |
| 3325 | } |
| 3326 | } |
| 3327 | *p++ = dp->conversion - 'A' + 'P'; |
| 3328 | # if WIDE_CHAR_VERSION |
| 3329 | { |
| 3330 | static const wchar_t decimal_format[] = |
| 3331 | { '%', '+', 'd', '\0' }; |
| 3332 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 3333 | } |
| 3334 | while (*p != '\0') |
| 3335 | p++; |
| 3336 | # else |
| 3337 | if (sizeof (DCHAR_T) == 1) |
| 3338 | { |
| 3339 | sprintf ((char *) p, "%+d", exponent); |
| 3340 | while (*p != '\0') |
| 3341 | p++; |
| 3342 | } |
| 3343 | else |
| 3344 | { |
| 3345 | char expbuf[6 + 1]; |
| 3346 | const char *ep; |
| 3347 | sprintf (expbuf, "%+d", exponent); |
| 3348 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 3349 | p++; |
| 3350 | } |
| 3351 | # endif |
| 3352 | } |
| 3353 | } |
| 3354 | # else |
| 3355 | abort (); |
| 3356 | # endif |
| 3357 | } |
| 3358 | /* The generated string now extends from tmp to p, with the |
| 3359 | zero padding insertion point being at pad_ptr. */ |
| 3360 | if (has_width && p - tmp < width) |
| 3361 | { |
| 3362 | size_t pad = width - (p - tmp); |
| 3363 | DCHAR_T *end = p + pad; |
| 3364 | |
| 3365 | if (flags & FLAG_LEFT) |
| 3366 | { |
| 3367 | /* Pad with spaces on the right. */ |
| 3368 | for (; pad > 0; pad--) |
| 3369 | *p++ = ' '; |
| 3370 | } |
| 3371 | else if ((flags & FLAG_ZERO) && pad_ptr != NULL) |
| 3372 | { |
| 3373 | /* Pad with zeroes. */ |
| 3374 | DCHAR_T *q = end; |
| 3375 | |
| 3376 | while (p > pad_ptr) |
| 3377 | *--q = *--p; |
| 3378 | for (; pad > 0; pad--) |
| 3379 | *p++ = '0'; |
| 3380 | } |
| 3381 | else |
| 3382 | { |
| 3383 | /* Pad with spaces on the left. */ |
| 3384 | DCHAR_T *q = end; |
| 3385 | |
| 3386 | while (p > tmp) |
| 3387 | *--q = *--p; |
| 3388 | for (; pad > 0; pad--) |
| 3389 | *p++ = ' '; |
| 3390 | } |
| 3391 | |
| 3392 | p = end; |
| 3393 | } |
| 3394 | |
| 3395 | { |
| 3396 | size_t count = p - tmp; |
| 3397 | |
| 3398 | if (count >= tmp_length) |
| 3399 | /* tmp_length was incorrectly calculated - fix the |
| 3400 | code above! */ |
| 3401 | abort (); |
| 3402 | |
| 3403 | /* Make room for the result. */ |
| 3404 | if (count >= allocated - length) |
| 3405 | { |
| 3406 | size_t n = xsum (length, count); |
| 3407 | |
| 3408 | ENSURE_ALLOCATION (n); |
| 3409 | } |
| 3410 | |
| 3411 | /* Append the result. */ |
| 3412 | memcpy (result + length, tmp, count * sizeof (DCHAR_T)); |
| 3413 | if (tmp != tmpbuf) |
| 3414 | free (tmp); |
| 3415 | length += count; |
| 3416 | } |
| 3417 | } |
| 3418 | #endif |
| 3419 | #if (NEED_PRINTF_INFINITE_DOUBLE || NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL |
| 3420 | else if ((dp->conversion == 'f' || dp->conversion == 'F' |
| 3421 | || dp->conversion == 'e' || dp->conversion == 'E' |
| 3422 | || dp->conversion == 'g' || dp->conversion == 'G' |
| 3423 | || dp->conversion == 'a' || dp->conversion == 'A') |
| 3424 | && (0 |
| 3425 | # if NEED_PRINTF_DOUBLE |
| 3426 | || a.arg[dp->arg_index].type == TYPE_DOUBLE |
| 3427 | # elif NEED_PRINTF_INFINITE_DOUBLE |
| 3428 | || (a.arg[dp->arg_index].type == TYPE_DOUBLE |
| 3429 | /* The systems (mingw) which produce wrong output |
| 3430 | for Inf, -Inf, and NaN also do so for -0.0. |
| 3431 | Therefore we treat this case here as well. */ |
| 3432 | && is_infinite_or_zero (a.arg[dp->arg_index].a.a_double)) |
| 3433 | # endif |
| 3434 | # if NEED_PRINTF_LONG_DOUBLE |
| 3435 | || a.arg[dp->arg_index].type == TYPE_LONGDOUBLE |
| 3436 | # elif NEED_PRINTF_INFINITE_LONG_DOUBLE |
| 3437 | || (a.arg[dp->arg_index].type == TYPE_LONGDOUBLE |
| 3438 | /* Some systems produce wrong output for Inf, |
| 3439 | -Inf, and NaN. Some systems in this category |
| 3440 | (IRIX 5.3) also do so for -0.0. Therefore we |
| 3441 | treat this case here as well. */ |
| 3442 | && is_infinite_or_zerol (a.arg[dp->arg_index].a.a_longdouble)) |
| 3443 | # endif |
| 3444 | )) |
| 3445 | { |
| 3446 | # if (NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE) |
| 3447 | arg_type type = a.arg[dp->arg_index].type; |
| 3448 | # endif |
| 3449 | int flags = dp->flags; |
| 3450 | int has_width; |
| 3451 | size_t width; |
| 3452 | int has_precision; |
| 3453 | size_t precision; |
| 3454 | size_t tmp_length; |
| 3455 | DCHAR_T tmpbuf[700]; |
| 3456 | DCHAR_T *tmp; |
| 3457 | DCHAR_T *pad_ptr; |
| 3458 | DCHAR_T *p; |
| 3459 | |
| 3460 | has_width = 0; |
| 3461 | width = 0; |
| 3462 | if (dp->width_start != dp->width_end) |
| 3463 | { |
| 3464 | if (dp->width_arg_index != ARG_NONE) |
| 3465 | { |
| 3466 | int arg; |
| 3467 | |
| 3468 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 3469 | abort (); |
| 3470 | arg = a.arg[dp->width_arg_index].a.a_int; |
| 3471 | if (arg < 0) |
| 3472 | { |
| 3473 | /* "A negative field width is taken as a '-' flag |
| 3474 | followed by a positive field width." */ |
| 3475 | flags |= FLAG_LEFT; |
| 3476 | width = (unsigned int) (-arg); |
| 3477 | } |
| 3478 | else |
| 3479 | width = arg; |
| 3480 | } |
| 3481 | else |
| 3482 | { |
| 3483 | const FCHAR_T *digitp = dp->width_start; |
| 3484 | |
| 3485 | do |
| 3486 | width = xsum (xtimes (width, 10), *digitp++ - '0'); |
| 3487 | while (digitp != dp->width_end); |
| 3488 | } |
| 3489 | has_width = 1; |
| 3490 | } |
| 3491 | |
| 3492 | has_precision = 0; |
| 3493 | precision = 0; |
| 3494 | if (dp->precision_start != dp->precision_end) |
| 3495 | { |
| 3496 | if (dp->precision_arg_index != ARG_NONE) |
| 3497 | { |
| 3498 | int arg; |
| 3499 | |
| 3500 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 3501 | abort (); |
| 3502 | arg = a.arg[dp->precision_arg_index].a.a_int; |
| 3503 | /* "A negative precision is taken as if the precision |
| 3504 | were omitted." */ |
| 3505 | if (arg >= 0) |
| 3506 | { |
| 3507 | precision = arg; |
| 3508 | has_precision = 1; |
| 3509 | } |
| 3510 | } |
| 3511 | else |
| 3512 | { |
| 3513 | const FCHAR_T *digitp = dp->precision_start + 1; |
| 3514 | |
| 3515 | precision = 0; |
| 3516 | while (digitp != dp->precision_end) |
| 3517 | precision = xsum (xtimes (precision, 10), *digitp++ - '0'); |
| 3518 | has_precision = 1; |
| 3519 | } |
| 3520 | } |
| 3521 | |
| 3522 | /* POSIX specifies the default precision to be 6 for %f, %F, |
| 3523 | %e, %E, but not for %g, %G. Implementations appear to use |
| 3524 | the same default precision also for %g, %G. But for %a, %A, |
| 3525 | the default precision is 0. */ |
| 3526 | if (!has_precision) |
| 3527 | if (!(dp->conversion == 'a' || dp->conversion == 'A')) |
| 3528 | precision = 6; |
| 3529 | |
| 3530 | /* Allocate a temporary buffer of sufficient size. */ |
| 3531 | # if NEED_PRINTF_DOUBLE && NEED_PRINTF_LONG_DOUBLE |
| 3532 | tmp_length = (type == TYPE_LONGDOUBLE ? LDBL_DIG + 1 : DBL_DIG + 1); |
| 3533 | # elif NEED_PRINTF_INFINITE_DOUBLE && NEED_PRINTF_LONG_DOUBLE |
| 3534 | tmp_length = (type == TYPE_LONGDOUBLE ? LDBL_DIG + 1 : 0); |
| 3535 | # elif NEED_PRINTF_LONG_DOUBLE |
| 3536 | tmp_length = LDBL_DIG + 1; |
| 3537 | # elif NEED_PRINTF_DOUBLE |
| 3538 | tmp_length = DBL_DIG + 1; |
| 3539 | # else |
| 3540 | tmp_length = 0; |
| 3541 | # endif |
| 3542 | if (tmp_length < precision) |
| 3543 | tmp_length = precision; |
| 3544 | # if NEED_PRINTF_LONG_DOUBLE |
| 3545 | # if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE |
| 3546 | if (type == TYPE_LONGDOUBLE) |
| 3547 | # endif |
| 3548 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 3549 | { |
| 3550 | long double arg = a.arg[dp->arg_index].a.a_longdouble; |
| 3551 | if (!(isnanl (arg) || arg + arg == arg)) |
| 3552 | { |
| 3553 | /* arg is finite and nonzero. */ |
| 3554 | int exponent = floorlog10l (arg < 0 ? -arg : arg); |
| 3555 | if (exponent >= 0 && tmp_length < exponent + precision) |
| 3556 | tmp_length = exponent + precision; |
| 3557 | } |
| 3558 | } |
| 3559 | # endif |
| 3560 | # if NEED_PRINTF_DOUBLE |
| 3561 | # if NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE |
| 3562 | if (type == TYPE_DOUBLE) |
| 3563 | # endif |
| 3564 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 3565 | { |
| 3566 | double arg = a.arg[dp->arg_index].a.a_double; |
| 3567 | if (!(isnand (arg) || arg + arg == arg)) |
| 3568 | { |
| 3569 | /* arg is finite and nonzero. */ |
| 3570 | int exponent = floorlog10 (arg < 0 ? -arg : arg); |
| 3571 | if (exponent >= 0 && tmp_length < exponent + precision) |
| 3572 | tmp_length = exponent + precision; |
| 3573 | } |
| 3574 | } |
| 3575 | # endif |
| 3576 | /* Account for sign, decimal point etc. */ |
| 3577 | tmp_length = xsum (tmp_length, 12); |
| 3578 | |
| 3579 | if (tmp_length < width) |
| 3580 | tmp_length = width; |
| 3581 | |
| 3582 | tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */ |
| 3583 | |
| 3584 | if (tmp_length <= sizeof (tmpbuf) / sizeof (DCHAR_T)) |
| 3585 | tmp = tmpbuf; |
| 3586 | else |
| 3587 | { |
| 3588 | size_t tmp_memsize = xtimes (tmp_length, sizeof (DCHAR_T)); |
| 3589 | |
| 3590 | if (size_overflow_p (tmp_memsize)) |
| 3591 | /* Overflow, would lead to out of memory. */ |
| 3592 | goto out_of_memory; |
| 3593 | tmp = (DCHAR_T *) malloc (tmp_memsize); |
| 3594 | if (tmp == NULL) |
| 3595 | /* Out of memory. */ |
| 3596 | goto out_of_memory; |
| 3597 | } |
| 3598 | |
| 3599 | pad_ptr = NULL; |
| 3600 | p = tmp; |
| 3601 | |
| 3602 | # if NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE |
| 3603 | # if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE |
| 3604 | if (type == TYPE_LONGDOUBLE) |
| 3605 | # endif |
| 3606 | { |
| 3607 | long double arg = a.arg[dp->arg_index].a.a_longdouble; |
| 3608 | |
| 3609 | if (isnanl (arg)) |
| 3610 | { |
| 3611 | if (dp->conversion >= 'A' && dp->conversion <= 'Z') |
| 3612 | { |
| 3613 | *p++ = 'N'; *p++ = 'A'; *p++ = 'N'; |
| 3614 | } |
| 3615 | else |
| 3616 | { |
| 3617 | *p++ = 'n'; *p++ = 'a'; *p++ = 'n'; |
| 3618 | } |
| 3619 | } |
| 3620 | else |
| 3621 | { |
| 3622 | int sign = 0; |
| 3623 | DECL_LONG_DOUBLE_ROUNDING |
| 3624 | |
| 3625 | BEGIN_LONG_DOUBLE_ROUNDING (); |
| 3626 | |
| 3627 | if (signbit (arg)) /* arg < 0.0L or negative zero */ |
| 3628 | { |
| 3629 | sign = -1; |
| 3630 | arg = -arg; |
| 3631 | } |
| 3632 | |
| 3633 | if (sign < 0) |
| 3634 | *p++ = '-'; |
| 3635 | else if (flags & FLAG_SHOWSIGN) |
| 3636 | *p++ = '+'; |
| 3637 | else if (flags & FLAG_SPACE) |
| 3638 | *p++ = ' '; |
| 3639 | |
| 3640 | if (arg > 0.0L && arg + arg == arg) |
| 3641 | { |
| 3642 | if (dp->conversion >= 'A' && dp->conversion <= 'Z') |
| 3643 | { |
| 3644 | *p++ = 'I'; *p++ = 'N'; *p++ = 'F'; |
| 3645 | } |
| 3646 | else |
| 3647 | { |
| 3648 | *p++ = 'i'; *p++ = 'n'; *p++ = 'f'; |
| 3649 | } |
| 3650 | } |
| 3651 | else |
| 3652 | { |
| 3653 | # if NEED_PRINTF_LONG_DOUBLE |
| 3654 | pad_ptr = p; |
| 3655 | |
| 3656 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 3657 | { |
| 3658 | char *digits; |
| 3659 | size_t ndigits; |
| 3660 | |
| 3661 | digits = |
| 3662 | scale10_round_decimal_long_double (arg, precision); |
| 3663 | if (digits == NULL) |
| 3664 | { |
| 3665 | END_LONG_DOUBLE_ROUNDING (); |
| 3666 | goto out_of_memory; |
| 3667 | } |
| 3668 | ndigits = strlen (digits); |
| 3669 | |
| 3670 | if (ndigits > precision) |
| 3671 | do |
| 3672 | { |
| 3673 | --ndigits; |
| 3674 | *p++ = digits[ndigits]; |
| 3675 | } |
| 3676 | while (ndigits > precision); |
| 3677 | else |
| 3678 | *p++ = '0'; |
| 3679 | /* Here ndigits <= precision. */ |
| 3680 | if ((flags & FLAG_ALT) || precision > 0) |
| 3681 | { |
| 3682 | *p++ = decimal_point_char (); |
| 3683 | for (; precision > ndigits; precision--) |
| 3684 | *p++ = '0'; |
| 3685 | while (ndigits > 0) |
| 3686 | { |
| 3687 | --ndigits; |
| 3688 | *p++ = digits[ndigits]; |
| 3689 | } |
| 3690 | } |
| 3691 | |
| 3692 | free (digits); |
| 3693 | } |
| 3694 | else if (dp->conversion == 'e' || dp->conversion == 'E') |
| 3695 | { |
| 3696 | int exponent; |
| 3697 | |
| 3698 | if (arg == 0.0L) |
| 3699 | { |
| 3700 | exponent = 0; |
| 3701 | *p++ = '0'; |
| 3702 | if ((flags & FLAG_ALT) || precision > 0) |
| 3703 | { |
| 3704 | *p++ = decimal_point_char (); |
| 3705 | for (; precision > 0; precision--) |
| 3706 | *p++ = '0'; |
| 3707 | } |
| 3708 | } |
| 3709 | else |
| 3710 | { |
| 3711 | /* arg > 0.0L. */ |
| 3712 | int adjusted; |
| 3713 | char *digits; |
| 3714 | size_t ndigits; |
| 3715 | |
| 3716 | exponent = floorlog10l (arg); |
| 3717 | adjusted = 0; |
| 3718 | for (;;) |
| 3719 | { |
| 3720 | digits = |
| 3721 | scale10_round_decimal_long_double (arg, |
| 3722 | (int)precision - exponent); |
| 3723 | if (digits == NULL) |
| 3724 | { |
| 3725 | END_LONG_DOUBLE_ROUNDING (); |
| 3726 | goto out_of_memory; |
| 3727 | } |
| 3728 | ndigits = strlen (digits); |
| 3729 | |
| 3730 | if (ndigits == precision + 1) |
| 3731 | break; |
| 3732 | if (ndigits < precision |
| 3733 | || ndigits > precision + 2) |
| 3734 | /* The exponent was not guessed |
| 3735 | precisely enough. */ |
| 3736 | abort (); |
| 3737 | if (adjusted) |
| 3738 | /* None of two values of exponent is |
| 3739 | the right one. Prevent an endless |
| 3740 | loop. */ |
| 3741 | abort (); |
| 3742 | free (digits); |
| 3743 | if (ndigits == precision) |
| 3744 | exponent -= 1; |
| 3745 | else |
| 3746 | exponent += 1; |
| 3747 | adjusted = 1; |
| 3748 | } |
| 3749 | /* Here ndigits = precision+1. */ |
| 3750 | if (is_borderline (digits, precision)) |
| 3751 | { |
| 3752 | /* Maybe the exponent guess was too high |
| 3753 | and a smaller exponent can be reached |
| 3754 | by turning a 10...0 into 9...9x. */ |
| 3755 | char *digits2 = |
| 3756 | scale10_round_decimal_long_double (arg, |
| 3757 | (int)precision - exponent + 1); |
| 3758 | if (digits2 == NULL) |
| 3759 | { |
| 3760 | free (digits); |
| 3761 | END_LONG_DOUBLE_ROUNDING (); |
| 3762 | goto out_of_memory; |
| 3763 | } |
| 3764 | if (strlen (digits2) == precision + 1) |
| 3765 | { |
| 3766 | free (digits); |
| 3767 | digits = digits2; |
| 3768 | exponent -= 1; |
| 3769 | } |
| 3770 | else |
| 3771 | free (digits2); |
| 3772 | } |
| 3773 | /* Here ndigits = precision+1. */ |
| 3774 | |
| 3775 | *p++ = digits[--ndigits]; |
| 3776 | if ((flags & FLAG_ALT) || precision > 0) |
| 3777 | { |
| 3778 | *p++ = decimal_point_char (); |
| 3779 | while (ndigits > 0) |
| 3780 | { |
| 3781 | --ndigits; |
| 3782 | *p++ = digits[ndigits]; |
| 3783 | } |
| 3784 | } |
| 3785 | |
| 3786 | free (digits); |
| 3787 | } |
| 3788 | |
| 3789 | *p++ = dp->conversion; /* 'e' or 'E' */ |
| 3790 | # if WIDE_CHAR_VERSION |
| 3791 | { |
| 3792 | static const wchar_t decimal_format[] = |
| 3793 | { '%', '+', '.', '2', 'd', '\0' }; |
| 3794 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 3795 | } |
| 3796 | while (*p != '\0') |
| 3797 | p++; |
| 3798 | # else |
| 3799 | if (sizeof (DCHAR_T) == 1) |
| 3800 | { |
| 3801 | sprintf ((char *) p, "%+.2d", exponent); |
| 3802 | while (*p != '\0') |
| 3803 | p++; |
| 3804 | } |
| 3805 | else |
| 3806 | { |
| 3807 | char expbuf[6 + 1]; |
| 3808 | const char *ep; |
| 3809 | sprintf (expbuf, "%+.2d", exponent); |
| 3810 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 3811 | p++; |
| 3812 | } |
| 3813 | # endif |
| 3814 | } |
| 3815 | else if (dp->conversion == 'g' || dp->conversion == 'G') |
| 3816 | { |
| 3817 | if (precision == 0) |
| 3818 | precision = 1; |
| 3819 | /* precision >= 1. */ |
| 3820 | |
| 3821 | if (arg == 0.0L) |
| 3822 | /* The exponent is 0, >= -4, < precision. |
| 3823 | Use fixed-point notation. */ |
| 3824 | { |
| 3825 | size_t ndigits = precision; |
| 3826 | /* Number of trailing zeroes that have to be |
| 3827 | dropped. */ |
| 3828 | size_t nzeroes = |
| 3829 | (flags & FLAG_ALT ? 0 : precision - 1); |
| 3830 | |
| 3831 | --ndigits; |
| 3832 | *p++ = '0'; |
| 3833 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 3834 | { |
| 3835 | *p++ = decimal_point_char (); |
| 3836 | while (ndigits > nzeroes) |
| 3837 | { |
| 3838 | --ndigits; |
| 3839 | *p++ = '0'; |
| 3840 | } |
| 3841 | } |
| 3842 | } |
| 3843 | else |
| 3844 | { |
| 3845 | /* arg > 0.0L. */ |
| 3846 | int exponent; |
| 3847 | int adjusted; |
| 3848 | char *digits; |
| 3849 | size_t ndigits; |
| 3850 | size_t nzeroes; |
| 3851 | |
| 3852 | exponent = floorlog10l (arg); |
| 3853 | adjusted = 0; |
| 3854 | for (;;) |
| 3855 | { |
| 3856 | digits = |
| 3857 | scale10_round_decimal_long_double (arg, |
| 3858 | (int)(precision - 1) - exponent); |
| 3859 | if (digits == NULL) |
| 3860 | { |
| 3861 | END_LONG_DOUBLE_ROUNDING (); |
| 3862 | goto out_of_memory; |
| 3863 | } |
| 3864 | ndigits = strlen (digits); |
| 3865 | |
| 3866 | if (ndigits == precision) |
| 3867 | break; |
| 3868 | if (ndigits < precision - 1 |
| 3869 | || ndigits > precision + 1) |
| 3870 | /* The exponent was not guessed |
| 3871 | precisely enough. */ |
| 3872 | abort (); |
| 3873 | if (adjusted) |
| 3874 | /* None of two values of exponent is |
| 3875 | the right one. Prevent an endless |
| 3876 | loop. */ |
| 3877 | abort (); |
| 3878 | free (digits); |
| 3879 | if (ndigits < precision) |
| 3880 | exponent -= 1; |
| 3881 | else |
| 3882 | exponent += 1; |
| 3883 | adjusted = 1; |
| 3884 | } |
| 3885 | /* Here ndigits = precision. */ |
| 3886 | if (is_borderline (digits, precision - 1)) |
| 3887 | { |
| 3888 | /* Maybe the exponent guess was too high |
| 3889 | and a smaller exponent can be reached |
| 3890 | by turning a 10...0 into 9...9x. */ |
| 3891 | char *digits2 = |
| 3892 | scale10_round_decimal_long_double (arg, |
| 3893 | (int)(precision - 1) - exponent + 1); |
| 3894 | if (digits2 == NULL) |
| 3895 | { |
| 3896 | free (digits); |
| 3897 | END_LONG_DOUBLE_ROUNDING (); |
| 3898 | goto out_of_memory; |
| 3899 | } |
| 3900 | if (strlen (digits2) == precision) |
| 3901 | { |
| 3902 | free (digits); |
| 3903 | digits = digits2; |
| 3904 | exponent -= 1; |
| 3905 | } |
| 3906 | else |
| 3907 | free (digits2); |
| 3908 | } |
| 3909 | /* Here ndigits = precision. */ |
| 3910 | |
| 3911 | /* Determine the number of trailing zeroes |
| 3912 | that have to be dropped. */ |
| 3913 | nzeroes = 0; |
| 3914 | if ((flags & FLAG_ALT) == 0) |
| 3915 | while (nzeroes < ndigits |
| 3916 | && digits[nzeroes] == '0') |
| 3917 | nzeroes++; |
| 3918 | |
| 3919 | /* The exponent is now determined. */ |
| 3920 | if (exponent >= -4 |
| 3921 | && exponent < (long)precision) |
| 3922 | { |
| 3923 | /* Fixed-point notation: |
| 3924 | max(exponent,0)+1 digits, then the |
| 3925 | decimal point, then the remaining |
| 3926 | digits without trailing zeroes. */ |
| 3927 | if (exponent >= 0) |
| 3928 | { |
| 3929 | size_t count = exponent + 1; |
| 3930 | /* Note: count <= precision = ndigits. */ |
| 3931 | for (; count > 0; count--) |
| 3932 | *p++ = digits[--ndigits]; |
| 3933 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 3934 | { |
| 3935 | *p++ = decimal_point_char (); |
| 3936 | while (ndigits > nzeroes) |
| 3937 | { |
| 3938 | --ndigits; |
| 3939 | *p++ = digits[ndigits]; |
| 3940 | } |
| 3941 | } |
| 3942 | } |
| 3943 | else |
| 3944 | { |
| 3945 | size_t count = -exponent - 1; |
| 3946 | *p++ = '0'; |
| 3947 | *p++ = decimal_point_char (); |
| 3948 | for (; count > 0; count--) |
| 3949 | *p++ = '0'; |
| 3950 | while (ndigits > nzeroes) |
| 3951 | { |
| 3952 | --ndigits; |
| 3953 | *p++ = digits[ndigits]; |
| 3954 | } |
| 3955 | } |
| 3956 | } |
| 3957 | else |
| 3958 | { |
| 3959 | /* Exponential notation. */ |
| 3960 | *p++ = digits[--ndigits]; |
| 3961 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 3962 | { |
| 3963 | *p++ = decimal_point_char (); |
| 3964 | while (ndigits > nzeroes) |
| 3965 | { |
| 3966 | --ndigits; |
| 3967 | *p++ = digits[ndigits]; |
| 3968 | } |
| 3969 | } |
| 3970 | *p++ = dp->conversion - 'G' + 'E'; /* 'e' or 'E' */ |
| 3971 | # if WIDE_CHAR_VERSION |
| 3972 | { |
| 3973 | static const wchar_t decimal_format[] = |
| 3974 | { '%', '+', '.', '2', 'd', '\0' }; |
| 3975 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 3976 | } |
| 3977 | while (*p != '\0') |
| 3978 | p++; |
| 3979 | # else |
| 3980 | if (sizeof (DCHAR_T) == 1) |
| 3981 | { |
| 3982 | sprintf ((char *) p, "%+.2d", exponent); |
| 3983 | while (*p != '\0') |
| 3984 | p++; |
| 3985 | } |
| 3986 | else |
| 3987 | { |
| 3988 | char expbuf[6 + 1]; |
| 3989 | const char *ep; |
| 3990 | sprintf (expbuf, "%+.2d", exponent); |
| 3991 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 3992 | p++; |
| 3993 | } |
| 3994 | # endif |
| 3995 | } |
| 3996 | |
| 3997 | free (digits); |
| 3998 | } |
| 3999 | } |
| 4000 | else |
| 4001 | abort (); |
| 4002 | # else |
| 4003 | /* arg is finite. */ |
| 4004 | if (!(arg == 0.0L)) |
| 4005 | abort (); |
| 4006 | |
| 4007 | pad_ptr = p; |
| 4008 | |
| 4009 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 4010 | { |
| 4011 | *p++ = '0'; |
| 4012 | if ((flags & FLAG_ALT) || precision > 0) |
| 4013 | { |
| 4014 | *p++ = decimal_point_char (); |
| 4015 | for (; precision > 0; precision--) |
| 4016 | *p++ = '0'; |
| 4017 | } |
| 4018 | } |
| 4019 | else if (dp->conversion == 'e' || dp->conversion == 'E') |
| 4020 | { |
| 4021 | *p++ = '0'; |
| 4022 | if ((flags & FLAG_ALT) || precision > 0) |
| 4023 | { |
| 4024 | *p++ = decimal_point_char (); |
| 4025 | for (; precision > 0; precision--) |
| 4026 | *p++ = '0'; |
| 4027 | } |
| 4028 | *p++ = dp->conversion; /* 'e' or 'E' */ |
| 4029 | *p++ = '+'; |
| 4030 | *p++ = '0'; |
| 4031 | *p++ = '0'; |
| 4032 | } |
| 4033 | else if (dp->conversion == 'g' || dp->conversion == 'G') |
| 4034 | { |
| 4035 | *p++ = '0'; |
| 4036 | if (flags & FLAG_ALT) |
| 4037 | { |
| 4038 | size_t ndigits = |
| 4039 | (precision > 0 ? precision - 1 : 0); |
| 4040 | *p++ = decimal_point_char (); |
| 4041 | for (; ndigits > 0; --ndigits) |
| 4042 | *p++ = '0'; |
| 4043 | } |
| 4044 | } |
| 4045 | else if (dp->conversion == 'a' || dp->conversion == 'A') |
| 4046 | { |
| 4047 | *p++ = '0'; |
| 4048 | *p++ = dp->conversion - 'A' + 'X'; |
| 4049 | pad_ptr = p; |
| 4050 | *p++ = '0'; |
| 4051 | if ((flags & FLAG_ALT) || precision > 0) |
| 4052 | { |
| 4053 | *p++ = decimal_point_char (); |
| 4054 | for (; precision > 0; precision--) |
| 4055 | *p++ = '0'; |
| 4056 | } |
| 4057 | *p++ = dp->conversion - 'A' + 'P'; |
| 4058 | *p++ = '+'; |
| 4059 | *p++ = '0'; |
| 4060 | } |
| 4061 | else |
| 4062 | abort (); |
| 4063 | # endif |
| 4064 | } |
| 4065 | |
| 4066 | END_LONG_DOUBLE_ROUNDING (); |
| 4067 | } |
| 4068 | } |
| 4069 | # if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE |
| 4070 | else |
| 4071 | # endif |
| 4072 | # endif |
| 4073 | # if NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE |
| 4074 | { |
| 4075 | double arg = a.arg[dp->arg_index].a.a_double; |
| 4076 | |
| 4077 | if (isnand (arg)) |
| 4078 | { |
| 4079 | if (dp->conversion >= 'A' && dp->conversion <= 'Z') |
| 4080 | { |
| 4081 | *p++ = 'N'; *p++ = 'A'; *p++ = 'N'; |
| 4082 | } |
| 4083 | else |
| 4084 | { |
| 4085 | *p++ = 'n'; *p++ = 'a'; *p++ = 'n'; |
| 4086 | } |
| 4087 | } |
| 4088 | else |
| 4089 | { |
| 4090 | int sign = 0; |
| 4091 | |
| 4092 | if (signbit (arg)) /* arg < 0.0 or negative zero */ |
| 4093 | { |
| 4094 | sign = -1; |
| 4095 | arg = -arg; |
| 4096 | } |
| 4097 | |
| 4098 | if (sign < 0) |
| 4099 | *p++ = '-'; |
| 4100 | else if (flags & FLAG_SHOWSIGN) |
| 4101 | *p++ = '+'; |
| 4102 | else if (flags & FLAG_SPACE) |
| 4103 | *p++ = ' '; |
| 4104 | |
| 4105 | if (arg > 0.0 && arg + arg == arg) |
| 4106 | { |
| 4107 | if (dp->conversion >= 'A' && dp->conversion <= 'Z') |
| 4108 | { |
| 4109 | *p++ = 'I'; *p++ = 'N'; *p++ = 'F'; |
| 4110 | } |
| 4111 | else |
| 4112 | { |
| 4113 | *p++ = 'i'; *p++ = 'n'; *p++ = 'f'; |
| 4114 | } |
| 4115 | } |
| 4116 | else |
| 4117 | { |
| 4118 | # if NEED_PRINTF_DOUBLE |
| 4119 | pad_ptr = p; |
| 4120 | |
| 4121 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 4122 | { |
| 4123 | char *digits; |
| 4124 | size_t ndigits; |
| 4125 | |
| 4126 | digits = |
| 4127 | scale10_round_decimal_double (arg, precision); |
| 4128 | if (digits == NULL) |
| 4129 | goto out_of_memory; |
| 4130 | ndigits = strlen (digits); |
| 4131 | |
| 4132 | if (ndigits > precision) |
| 4133 | do |
| 4134 | { |
| 4135 | --ndigits; |
| 4136 | *p++ = digits[ndigits]; |
| 4137 | } |
| 4138 | while (ndigits > precision); |
| 4139 | else |
| 4140 | *p++ = '0'; |
| 4141 | /* Here ndigits <= precision. */ |
| 4142 | if ((flags & FLAG_ALT) || precision > 0) |
| 4143 | { |
| 4144 | *p++ = decimal_point_char (); |
| 4145 | for (; precision > ndigits; precision--) |
| 4146 | *p++ = '0'; |
| 4147 | while (ndigits > 0) |
| 4148 | { |
| 4149 | --ndigits; |
| 4150 | *p++ = digits[ndigits]; |
| 4151 | } |
| 4152 | } |
| 4153 | |
| 4154 | free (digits); |
| 4155 | } |
| 4156 | else if (dp->conversion == 'e' || dp->conversion == 'E') |
| 4157 | { |
| 4158 | int exponent; |
| 4159 | |
| 4160 | if (arg == 0.0) |
| 4161 | { |
| 4162 | exponent = 0; |
| 4163 | *p++ = '0'; |
| 4164 | if ((flags & FLAG_ALT) || precision > 0) |
| 4165 | { |
| 4166 | *p++ = decimal_point_char (); |
| 4167 | for (; precision > 0; precision--) |
| 4168 | *p++ = '0'; |
| 4169 | } |
| 4170 | } |
| 4171 | else |
| 4172 | { |
| 4173 | /* arg > 0.0. */ |
| 4174 | int adjusted; |
| 4175 | char *digits; |
| 4176 | size_t ndigits; |
| 4177 | |
| 4178 | exponent = floorlog10 (arg); |
| 4179 | adjusted = 0; |
| 4180 | for (;;) |
| 4181 | { |
| 4182 | digits = |
| 4183 | scale10_round_decimal_double (arg, |
| 4184 | (int)precision - exponent); |
| 4185 | if (digits == NULL) |
| 4186 | goto out_of_memory; |
| 4187 | ndigits = strlen (digits); |
| 4188 | |
| 4189 | if (ndigits == precision + 1) |
| 4190 | break; |
| 4191 | if (ndigits < precision |
| 4192 | || ndigits > precision + 2) |
| 4193 | /* The exponent was not guessed |
| 4194 | precisely enough. */ |
| 4195 | abort (); |
| 4196 | if (adjusted) |
| 4197 | /* None of two values of exponent is |
| 4198 | the right one. Prevent an endless |
| 4199 | loop. */ |
| 4200 | abort (); |
| 4201 | free (digits); |
| 4202 | if (ndigits == precision) |
| 4203 | exponent -= 1; |
| 4204 | else |
| 4205 | exponent += 1; |
| 4206 | adjusted = 1; |
| 4207 | } |
| 4208 | /* Here ndigits = precision+1. */ |
| 4209 | if (is_borderline (digits, precision)) |
| 4210 | { |
| 4211 | /* Maybe the exponent guess was too high |
| 4212 | and a smaller exponent can be reached |
| 4213 | by turning a 10...0 into 9...9x. */ |
| 4214 | char *digits2 = |
| 4215 | scale10_round_decimal_double (arg, |
| 4216 | (int)precision - exponent + 1); |
| 4217 | if (digits2 == NULL) |
| 4218 | { |
| 4219 | free (digits); |
| 4220 | goto out_of_memory; |
| 4221 | } |
| 4222 | if (strlen (digits2) == precision + 1) |
| 4223 | { |
| 4224 | free (digits); |
| 4225 | digits = digits2; |
| 4226 | exponent -= 1; |
| 4227 | } |
| 4228 | else |
| 4229 | free (digits2); |
| 4230 | } |
| 4231 | /* Here ndigits = precision+1. */ |
| 4232 | |
| 4233 | *p++ = digits[--ndigits]; |
| 4234 | if ((flags & FLAG_ALT) || precision > 0) |
| 4235 | { |
| 4236 | *p++ = decimal_point_char (); |
| 4237 | while (ndigits > 0) |
| 4238 | { |
| 4239 | --ndigits; |
| 4240 | *p++ = digits[ndigits]; |
| 4241 | } |
| 4242 | } |
| 4243 | |
| 4244 | free (digits); |
| 4245 | } |
| 4246 | |
| 4247 | *p++ = dp->conversion; /* 'e' or 'E' */ |
| 4248 | # if WIDE_CHAR_VERSION |
| 4249 | { |
| 4250 | static const wchar_t decimal_format[] = |
| 4251 | /* Produce the same number of exponent digits |
| 4252 | as the native printf implementation. */ |
| 4253 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4254 | { '%', '+', '.', '3', 'd', '\0' }; |
| 4255 | # else |
| 4256 | { '%', '+', '.', '2', 'd', '\0' }; |
| 4257 | # endif |
| 4258 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 4259 | } |
| 4260 | while (*p != '\0') |
| 4261 | p++; |
| 4262 | # else |
| 4263 | { |
| 4264 | static const char decimal_format[] = |
| 4265 | /* Produce the same number of exponent digits |
| 4266 | as the native printf implementation. */ |
| 4267 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4268 | "%+.3d"; |
| 4269 | # else |
| 4270 | "%+.2d"; |
| 4271 | # endif |
| 4272 | if (sizeof (DCHAR_T) == 1) |
| 4273 | { |
| 4274 | sprintf ((char *) p, decimal_format, exponent); |
| 4275 | while (*p != '\0') |
| 4276 | p++; |
| 4277 | } |
| 4278 | else |
| 4279 | { |
| 4280 | char expbuf[6 + 1]; |
| 4281 | const char *ep; |
| 4282 | sprintf (expbuf, decimal_format, exponent); |
| 4283 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 4284 | p++; |
| 4285 | } |
| 4286 | } |
| 4287 | # endif |
| 4288 | } |
| 4289 | else if (dp->conversion == 'g' || dp->conversion == 'G') |
| 4290 | { |
| 4291 | if (precision == 0) |
| 4292 | precision = 1; |
| 4293 | /* precision >= 1. */ |
| 4294 | |
| 4295 | if (arg == 0.0) |
| 4296 | /* The exponent is 0, >= -4, < precision. |
| 4297 | Use fixed-point notation. */ |
| 4298 | { |
| 4299 | size_t ndigits = precision; |
| 4300 | /* Number of trailing zeroes that have to be |
| 4301 | dropped. */ |
| 4302 | size_t nzeroes = |
| 4303 | (flags & FLAG_ALT ? 0 : precision - 1); |
| 4304 | |
| 4305 | --ndigits; |
| 4306 | *p++ = '0'; |
| 4307 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 4308 | { |
| 4309 | *p++ = decimal_point_char (); |
| 4310 | while (ndigits > nzeroes) |
| 4311 | { |
| 4312 | --ndigits; |
| 4313 | *p++ = '0'; |
| 4314 | } |
| 4315 | } |
| 4316 | } |
| 4317 | else |
| 4318 | { |
| 4319 | /* arg > 0.0. */ |
| 4320 | int exponent; |
| 4321 | int adjusted; |
| 4322 | char *digits; |
| 4323 | size_t ndigits; |
| 4324 | size_t nzeroes; |
| 4325 | |
| 4326 | exponent = floorlog10 (arg); |
| 4327 | adjusted = 0; |
| 4328 | for (;;) |
| 4329 | { |
| 4330 | digits = |
| 4331 | scale10_round_decimal_double (arg, |
| 4332 | (int)(precision - 1) - exponent); |
| 4333 | if (digits == NULL) |
| 4334 | goto out_of_memory; |
| 4335 | ndigits = strlen (digits); |
| 4336 | |
| 4337 | if (ndigits == precision) |
| 4338 | break; |
| 4339 | if (ndigits < precision - 1 |
| 4340 | || ndigits > precision + 1) |
| 4341 | /* The exponent was not guessed |
| 4342 | precisely enough. */ |
| 4343 | abort (); |
| 4344 | if (adjusted) |
| 4345 | /* None of two values of exponent is |
| 4346 | the right one. Prevent an endless |
| 4347 | loop. */ |
| 4348 | abort (); |
| 4349 | free (digits); |
| 4350 | if (ndigits < precision) |
| 4351 | exponent -= 1; |
| 4352 | else |
| 4353 | exponent += 1; |
| 4354 | adjusted = 1; |
| 4355 | } |
| 4356 | /* Here ndigits = precision. */ |
| 4357 | if (is_borderline (digits, precision - 1)) |
| 4358 | { |
| 4359 | /* Maybe the exponent guess was too high |
| 4360 | and a smaller exponent can be reached |
| 4361 | by turning a 10...0 into 9...9x. */ |
| 4362 | char *digits2 = |
| 4363 | scale10_round_decimal_double (arg, |
| 4364 | (int)(precision - 1) - exponent + 1); |
| 4365 | if (digits2 == NULL) |
| 4366 | { |
| 4367 | free (digits); |
| 4368 | goto out_of_memory; |
| 4369 | } |
| 4370 | if (strlen (digits2) == precision) |
| 4371 | { |
| 4372 | free (digits); |
| 4373 | digits = digits2; |
| 4374 | exponent -= 1; |
| 4375 | } |
| 4376 | else |
| 4377 | free (digits2); |
| 4378 | } |
| 4379 | /* Here ndigits = precision. */ |
| 4380 | |
| 4381 | /* Determine the number of trailing zeroes |
| 4382 | that have to be dropped. */ |
| 4383 | nzeroes = 0; |
| 4384 | if ((flags & FLAG_ALT) == 0) |
| 4385 | while (nzeroes < ndigits |
| 4386 | && digits[nzeroes] == '0') |
| 4387 | nzeroes++; |
| 4388 | |
| 4389 | /* The exponent is now determined. */ |
| 4390 | if (exponent >= -4 |
| 4391 | && exponent < (long)precision) |
| 4392 | { |
| 4393 | /* Fixed-point notation: |
| 4394 | max(exponent,0)+1 digits, then the |
| 4395 | decimal point, then the remaining |
| 4396 | digits without trailing zeroes. */ |
| 4397 | if (exponent >= 0) |
| 4398 | { |
| 4399 | size_t count = exponent + 1; |
| 4400 | /* Note: count <= precision = ndigits. */ |
| 4401 | for (; count > 0; count--) |
| 4402 | *p++ = digits[--ndigits]; |
| 4403 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 4404 | { |
| 4405 | *p++ = decimal_point_char (); |
| 4406 | while (ndigits > nzeroes) |
| 4407 | { |
| 4408 | --ndigits; |
| 4409 | *p++ = digits[ndigits]; |
| 4410 | } |
| 4411 | } |
| 4412 | } |
| 4413 | else |
| 4414 | { |
| 4415 | size_t count = -exponent - 1; |
| 4416 | *p++ = '0'; |
| 4417 | *p++ = decimal_point_char (); |
| 4418 | for (; count > 0; count--) |
| 4419 | *p++ = '0'; |
| 4420 | while (ndigits > nzeroes) |
| 4421 | { |
| 4422 | --ndigits; |
| 4423 | *p++ = digits[ndigits]; |
| 4424 | } |
| 4425 | } |
| 4426 | } |
| 4427 | else |
| 4428 | { |
| 4429 | /* Exponential notation. */ |
| 4430 | *p++ = digits[--ndigits]; |
| 4431 | if ((flags & FLAG_ALT) || ndigits > nzeroes) |
| 4432 | { |
| 4433 | *p++ = decimal_point_char (); |
| 4434 | while (ndigits > nzeroes) |
| 4435 | { |
| 4436 | --ndigits; |
| 4437 | *p++ = digits[ndigits]; |
| 4438 | } |
| 4439 | } |
| 4440 | *p++ = dp->conversion - 'G' + 'E'; /* 'e' or 'E' */ |
| 4441 | # if WIDE_CHAR_VERSION |
| 4442 | { |
| 4443 | static const wchar_t decimal_format[] = |
| 4444 | /* Produce the same number of exponent digits |
| 4445 | as the native printf implementation. */ |
| 4446 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4447 | { '%', '+', '.', '3', 'd', '\0' }; |
| 4448 | # else |
| 4449 | { '%', '+', '.', '2', 'd', '\0' }; |
| 4450 | # endif |
| 4451 | SNPRINTF (p, 6 + 1, decimal_format, exponent); |
| 4452 | } |
| 4453 | while (*p != '\0') |
| 4454 | p++; |
| 4455 | # else |
| 4456 | { |
| 4457 | static const char decimal_format[] = |
| 4458 | /* Produce the same number of exponent digits |
| 4459 | as the native printf implementation. */ |
| 4460 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4461 | "%+.3d"; |
| 4462 | # else |
| 4463 | "%+.2d"; |
| 4464 | # endif |
| 4465 | if (sizeof (DCHAR_T) == 1) |
| 4466 | { |
| 4467 | sprintf ((char *) p, decimal_format, exponent); |
| 4468 | while (*p != '\0') |
| 4469 | p++; |
| 4470 | } |
| 4471 | else |
| 4472 | { |
| 4473 | char expbuf[6 + 1]; |
| 4474 | const char *ep; |
| 4475 | sprintf (expbuf, decimal_format, exponent); |
| 4476 | for (ep = expbuf; (*p = *ep) != '\0'; ep++) |
| 4477 | p++; |
| 4478 | } |
| 4479 | } |
| 4480 | # endif |
| 4481 | } |
| 4482 | |
| 4483 | free (digits); |
| 4484 | } |
| 4485 | } |
| 4486 | else |
| 4487 | abort (); |
| 4488 | # else |
| 4489 | /* arg is finite. */ |
| 4490 | if (!(arg == 0.0)) |
| 4491 | abort (); |
| 4492 | |
| 4493 | pad_ptr = p; |
| 4494 | |
| 4495 | if (dp->conversion == 'f' || dp->conversion == 'F') |
| 4496 | { |
| 4497 | *p++ = '0'; |
| 4498 | if ((flags & FLAG_ALT) || precision > 0) |
| 4499 | { |
| 4500 | *p++ = decimal_point_char (); |
| 4501 | for (; precision > 0; precision--) |
| 4502 | *p++ = '0'; |
| 4503 | } |
| 4504 | } |
| 4505 | else if (dp->conversion == 'e' || dp->conversion == 'E') |
| 4506 | { |
| 4507 | *p++ = '0'; |
| 4508 | if ((flags & FLAG_ALT) || precision > 0) |
| 4509 | { |
| 4510 | *p++ = decimal_point_char (); |
| 4511 | for (; precision > 0; precision--) |
| 4512 | *p++ = '0'; |
| 4513 | } |
| 4514 | *p++ = dp->conversion; /* 'e' or 'E' */ |
| 4515 | *p++ = '+'; |
| 4516 | /* Produce the same number of exponent digits as |
| 4517 | the native printf implementation. */ |
| 4518 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4519 | *p++ = '0'; |
| 4520 | # endif |
| 4521 | *p++ = '0'; |
| 4522 | *p++ = '0'; |
| 4523 | } |
| 4524 | else if (dp->conversion == 'g' || dp->conversion == 'G') |
| 4525 | { |
| 4526 | *p++ = '0'; |
| 4527 | if (flags & FLAG_ALT) |
| 4528 | { |
| 4529 | size_t ndigits = |
| 4530 | (precision > 0 ? precision - 1 : 0); |
| 4531 | *p++ = decimal_point_char (); |
| 4532 | for (; ndigits > 0; --ndigits) |
| 4533 | *p++ = '0'; |
| 4534 | } |
| 4535 | } |
| 4536 | else |
| 4537 | abort (); |
| 4538 | # endif |
| 4539 | } |
| 4540 | } |
| 4541 | } |
| 4542 | # endif |
| 4543 | |
| 4544 | /* The generated string now extends from tmp to p, with the |
| 4545 | zero padding insertion point being at pad_ptr. */ |
| 4546 | if (has_width && p - tmp < width) |
| 4547 | { |
| 4548 | size_t pad = width - (p - tmp); |
| 4549 | DCHAR_T *end = p + pad; |
| 4550 | |
| 4551 | if (flags & FLAG_LEFT) |
| 4552 | { |
| 4553 | /* Pad with spaces on the right. */ |
| 4554 | for (; pad > 0; pad--) |
| 4555 | *p++ = ' '; |
| 4556 | } |
| 4557 | else if ((flags & FLAG_ZERO) && pad_ptr != NULL) |
| 4558 | { |
| 4559 | /* Pad with zeroes. */ |
| 4560 | DCHAR_T *q = end; |
| 4561 | |
| 4562 | while (p > pad_ptr) |
| 4563 | *--q = *--p; |
| 4564 | for (; pad > 0; pad--) |
| 4565 | *p++ = '0'; |
| 4566 | } |
| 4567 | else |
| 4568 | { |
| 4569 | /* Pad with spaces on the left. */ |
| 4570 | DCHAR_T *q = end; |
| 4571 | |
| 4572 | while (p > tmp) |
| 4573 | *--q = *--p; |
| 4574 | for (; pad > 0; pad--) |
| 4575 | *p++ = ' '; |
| 4576 | } |
| 4577 | |
| 4578 | p = end; |
| 4579 | } |
| 4580 | |
| 4581 | { |
| 4582 | size_t count = p - tmp; |
| 4583 | |
| 4584 | if (count >= tmp_length) |
| 4585 | /* tmp_length was incorrectly calculated - fix the |
| 4586 | code above! */ |
| 4587 | abort (); |
| 4588 | |
| 4589 | /* Make room for the result. */ |
| 4590 | if (count >= allocated - length) |
| 4591 | { |
| 4592 | size_t n = xsum (length, count); |
| 4593 | |
| 4594 | ENSURE_ALLOCATION (n); |
| 4595 | } |
| 4596 | |
| 4597 | /* Append the result. */ |
| 4598 | memcpy (result + length, tmp, count * sizeof (DCHAR_T)); |
| 4599 | if (tmp != tmpbuf) |
| 4600 | free (tmp); |
| 4601 | length += count; |
| 4602 | } |
| 4603 | } |
| 4604 | #endif |
| 4605 | else |
| 4606 | { |
| 4607 | arg_type type = a.arg[dp->arg_index].type; |
| 4608 | int flags = dp->flags; |
| 4609 | #if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION |
| 4610 | int has_width; |
| 4611 | size_t width; |
| 4612 | #endif |
| 4613 | #if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || NEED_PRINTF_UNBOUNDED_PRECISION |
| 4614 | int has_precision; |
| 4615 | size_t precision; |
| 4616 | #endif |
| 4617 | #if NEED_PRINTF_UNBOUNDED_PRECISION |
| 4618 | int prec_ourselves; |
| 4619 | #else |
| 4620 | # define prec_ourselves 0 |
| 4621 | #endif |
| 4622 | #if NEED_PRINTF_FLAG_LEFTADJUST |
| 4623 | # define pad_ourselves 1 |
| 4624 | #elif !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION |
| 4625 | int pad_ourselves; |
| 4626 | #else |
| 4627 | # define pad_ourselves 0 |
| 4628 | #endif |
| 4629 | TCHAR_T *fbp; |
| 4630 | unsigned int prefix_count; |
| 4631 | int prefixes[2] IF_LINT (= { 0 }); |
| 4632 | int orig_errno; |
| 4633 | #if !USE_SNPRINTF |
| 4634 | size_t tmp_length; |
| 4635 | TCHAR_T tmpbuf[700]; |
| 4636 | TCHAR_T *tmp; |
| 4637 | #endif |
| 4638 | |
| 4639 | #if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION |
| 4640 | has_width = 0; |
| 4641 | width = 0; |
| 4642 | if (dp->width_start != dp->width_end) |
| 4643 | { |
| 4644 | if (dp->width_arg_index != ARG_NONE) |
| 4645 | { |
| 4646 | int arg; |
| 4647 | |
| 4648 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 4649 | abort (); |
| 4650 | arg = a.arg[dp->width_arg_index].a.a_int; |
| 4651 | if (arg < 0) |
| 4652 | { |
| 4653 | /* "A negative field width is taken as a '-' flag |
| 4654 | followed by a positive field width." */ |
| 4655 | flags |= FLAG_LEFT; |
| 4656 | width = (unsigned int) (-arg); |
| 4657 | } |
| 4658 | else |
| 4659 | width = arg; |
| 4660 | } |
| 4661 | else |
| 4662 | { |
| 4663 | const FCHAR_T *digitp = dp->width_start; |
| 4664 | |
| 4665 | do |
| 4666 | width = xsum (xtimes (width, 10), *digitp++ - '0'); |
| 4667 | while (digitp != dp->width_end); |
| 4668 | } |
| 4669 | has_width = 1; |
| 4670 | } |
| 4671 | #endif |
| 4672 | |
| 4673 | #if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || NEED_PRINTF_UNBOUNDED_PRECISION |
| 4674 | has_precision = 0; |
| 4675 | precision = 6; |
| 4676 | if (dp->precision_start != dp->precision_end) |
| 4677 | { |
| 4678 | if (dp->precision_arg_index != ARG_NONE) |
| 4679 | { |
| 4680 | int arg; |
| 4681 | |
| 4682 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 4683 | abort (); |
| 4684 | arg = a.arg[dp->precision_arg_index].a.a_int; |
| 4685 | /* "A negative precision is taken as if the precision |
| 4686 | were omitted." */ |
| 4687 | if (arg >= 0) |
| 4688 | { |
| 4689 | precision = arg; |
| 4690 | has_precision = 1; |
| 4691 | } |
| 4692 | } |
| 4693 | else |
| 4694 | { |
| 4695 | const FCHAR_T *digitp = dp->precision_start + 1; |
| 4696 | |
| 4697 | precision = 0; |
| 4698 | while (digitp != dp->precision_end) |
| 4699 | precision = xsum (xtimes (precision, 10), *digitp++ - '0'); |
| 4700 | has_precision = 1; |
| 4701 | } |
| 4702 | } |
| 4703 | #endif |
| 4704 | |
| 4705 | /* Decide whether to handle the precision ourselves. */ |
| 4706 | #if NEED_PRINTF_UNBOUNDED_PRECISION |
| 4707 | switch (dp->conversion) |
| 4708 | { |
| 4709 | case 'd': case 'i': case 'u': |
| 4710 | case 'o': |
| 4711 | case 'x': case 'X': case 'p': |
| 4712 | prec_ourselves = has_precision && (precision > 0); |
| 4713 | break; |
| 4714 | default: |
| 4715 | prec_ourselves = 0; |
| 4716 | break; |
| 4717 | } |
| 4718 | #endif |
| 4719 | |
| 4720 | /* Decide whether to perform the padding ourselves. */ |
| 4721 | #if !NEED_PRINTF_FLAG_LEFTADJUST && (!DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION) |
| 4722 | switch (dp->conversion) |
| 4723 | { |
| 4724 | # if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO |
| 4725 | /* If we need conversion from TCHAR_T[] to DCHAR_T[], we need |
| 4726 | to perform the padding after this conversion. Functions |
| 4727 | with unistdio extensions perform the padding based on |
| 4728 | character count rather than element count. */ |
| 4729 | case 'c': case 's': |
| 4730 | # endif |
| 4731 | # if NEED_PRINTF_FLAG_ZERO |
| 4732 | case 'f': case 'F': case 'e': case 'E': case 'g': case 'G': |
| 4733 | case 'a': case 'A': |
| 4734 | # endif |
| 4735 | pad_ourselves = 1; |
| 4736 | break; |
| 4737 | default: |
| 4738 | pad_ourselves = prec_ourselves; |
| 4739 | break; |
| 4740 | } |
| 4741 | #endif |
| 4742 | |
| 4743 | #if !USE_SNPRINTF |
| 4744 | /* Allocate a temporary buffer of sufficient size for calling |
| 4745 | sprintf. */ |
| 4746 | tmp_length = |
| 4747 | MAX_ROOM_NEEDED (&a, dp->arg_index, dp->conversion, type, |
| 4748 | flags, width, has_precision, precision, |
| 4749 | pad_ourselves); |
| 4750 | |
| 4751 | if (tmp_length <= sizeof (tmpbuf) / sizeof (TCHAR_T)) |
| 4752 | tmp = tmpbuf; |
| 4753 | else |
| 4754 | { |
| 4755 | size_t tmp_memsize = xtimes (tmp_length, sizeof (TCHAR_T)); |
| 4756 | |
| 4757 | if (size_overflow_p (tmp_memsize)) |
| 4758 | /* Overflow, would lead to out of memory. */ |
| 4759 | goto out_of_memory; |
| 4760 | tmp = (TCHAR_T *) malloc (tmp_memsize); |
| 4761 | if (tmp == NULL) |
| 4762 | /* Out of memory. */ |
| 4763 | goto out_of_memory; |
| 4764 | } |
| 4765 | #endif |
| 4766 | |
| 4767 | /* Construct the format string for calling snprintf or |
| 4768 | sprintf. */ |
| 4769 | fbp = buf; |
| 4770 | *fbp++ = '%'; |
| 4771 | #if NEED_PRINTF_FLAG_GROUPING |
| 4772 | /* The underlying implementation doesn't support the ' flag. |
| 4773 | Produce no grouping characters in this case; this is |
| 4774 | acceptable because the grouping is locale dependent. */ |
| 4775 | #else |
| 4776 | if (flags & FLAG_GROUP) |
| 4777 | *fbp++ = '\''; |
| 4778 | #endif |
| 4779 | if (flags & FLAG_LEFT) |
| 4780 | *fbp++ = '-'; |
| 4781 | if (flags & FLAG_SHOWSIGN) |
| 4782 | *fbp++ = '+'; |
| 4783 | if (flags & FLAG_SPACE) |
| 4784 | *fbp++ = ' '; |
| 4785 | if (flags & FLAG_ALT) |
| 4786 | *fbp++ = '#'; |
| 4787 | #if __GLIBC__ >= 2 && !defined __UCLIBC__ |
| 4788 | if (flags & FLAG_LOCALIZED) |
| 4789 | *fbp++ = 'I'; |
| 4790 | #endif |
| 4791 | if (!pad_ourselves) |
| 4792 | { |
| 4793 | if (flags & FLAG_ZERO) |
| 4794 | *fbp++ = '0'; |
| 4795 | if (dp->width_start != dp->width_end) |
| 4796 | { |
| 4797 | size_t n = dp->width_end - dp->width_start; |
| 4798 | /* The width specification is known to consist only |
| 4799 | of standard ASCII characters. */ |
| 4800 | if (sizeof (FCHAR_T) == sizeof (TCHAR_T)) |
| 4801 | { |
| 4802 | memcpy (fbp, dp->width_start, n * sizeof (TCHAR_T)); |
| 4803 | fbp += n; |
| 4804 | } |
| 4805 | else |
| 4806 | { |
| 4807 | const FCHAR_T *mp = dp->width_start; |
| 4808 | do |
| 4809 | *fbp++ = (unsigned char) *mp++; |
| 4810 | while (--n > 0); |
| 4811 | } |
| 4812 | } |
| 4813 | } |
| 4814 | if (!prec_ourselves) |
| 4815 | { |
| 4816 | if (dp->precision_start != dp->precision_end) |
| 4817 | { |
| 4818 | size_t n = dp->precision_end - dp->precision_start; |
| 4819 | /* The precision specification is known to consist only |
| 4820 | of standard ASCII characters. */ |
| 4821 | if (sizeof (FCHAR_T) == sizeof (TCHAR_T)) |
| 4822 | { |
| 4823 | memcpy (fbp, dp->precision_start, n * sizeof (TCHAR_T)); |
| 4824 | fbp += n; |
| 4825 | } |
| 4826 | else |
| 4827 | { |
| 4828 | const FCHAR_T *mp = dp->precision_start; |
| 4829 | do |
| 4830 | *fbp++ = (unsigned char) *mp++; |
| 4831 | while (--n > 0); |
| 4832 | } |
| 4833 | } |
| 4834 | } |
| 4835 | |
| 4836 | switch (type) |
| 4837 | { |
| 4838 | #if HAVE_LONG_LONG_INT |
| 4839 | case TYPE_LONGLONGINT: |
| 4840 | case TYPE_ULONGLONGINT: |
| 4841 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 4842 | *fbp++ = 'I'; |
| 4843 | *fbp++ = '6'; |
| 4844 | *fbp++ = '4'; |
| 4845 | break; |
| 4846 | # else |
| 4847 | *fbp++ = 'l'; |
| 4848 | /*FALLTHROUGH*/ |
| 4849 | # endif |
| 4850 | #endif |
| 4851 | case TYPE_LONGINT: |
| 4852 | case TYPE_ULONGINT: |
| 4853 | #if HAVE_WINT_T |
| 4854 | case TYPE_WIDE_CHAR: |
| 4855 | #endif |
| 4856 | #if HAVE_WCHAR_T |
| 4857 | case TYPE_WIDE_STRING: |
| 4858 | #endif |
| 4859 | *fbp++ = 'l'; |
| 4860 | break; |
| 4861 | case TYPE_LONGDOUBLE: |
| 4862 | *fbp++ = 'L'; |
| 4863 | break; |
| 4864 | default: |
| 4865 | break; |
| 4866 | } |
| 4867 | #if NEED_PRINTF_DIRECTIVE_F |
| 4868 | if (dp->conversion == 'F') |
| 4869 | *fbp = 'f'; |
| 4870 | else |
| 4871 | #endif |
| 4872 | *fbp = dp->conversion; |
| 4873 | #if USE_SNPRINTF |
| 4874 | # if !(((__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined __UCLIBC__) || ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)) |
| 4875 | fbp[1] = '%'; |
| 4876 | fbp[2] = 'n'; |
| 4877 | fbp[3] = '\0'; |
| 4878 | # else |
| 4879 | /* On glibc2 systems from glibc >= 2.3 - probably also older |
| 4880 | ones - we know that snprintf's return value conforms to |
| 4881 | ISO C 99: the tests gl_SNPRINTF_RETVAL_C99 and |
| 4882 | gl_SNPRINTF_TRUNCATION_C99 pass. |
| 4883 | Therefore we can avoid using %n in this situation. |
| 4884 | On glibc2 systems from 2004-10-18 or newer, the use of %n |
| 4885 | in format strings in writable memory may crash the program |
| 4886 | (if compiled with _FORTIFY_SOURCE=2), so we should avoid it |
| 4887 | in this situation. */ |
| 4888 | /* On native Windows systems (such as mingw), we can avoid using |
| 4889 | %n because: |
| 4890 | - Although the gl_SNPRINTF_TRUNCATION_C99 test fails, |
| 4891 | snprintf does not write more than the specified number |
| 4892 | of bytes. (snprintf (buf, 3, "%d %d", 4567, 89) writes |
| 4893 | '4', '5', '6' into buf, not '4', '5', '\0'.) |
| 4894 | - Although the gl_SNPRINTF_RETVAL_C99 test fails, snprintf |
| 4895 | allows us to recognize the case of an insufficient |
| 4896 | buffer size: it returns -1 in this case. |
| 4897 | On native Windows systems (such as mingw) where the OS is |
| 4898 | Windows Vista, the use of %n in format strings by default |
| 4899 | crashes the program. See |
| 4900 | <http://gcc.gnu.org/ml/gcc/2007-06/msg00122.html> and |
| 4901 | <http://msdn2.microsoft.com/en-us/library/ms175782(VS.80).aspx> |
| 4902 | So we should avoid %n in this situation. */ |
| 4903 | fbp[1] = '\0'; |
| 4904 | # endif |
| 4905 | #else |
| 4906 | fbp[1] = '\0'; |
| 4907 | #endif |
| 4908 | |
| 4909 | /* Construct the arguments for calling snprintf or sprintf. */ |
| 4910 | prefix_count = 0; |
| 4911 | if (!pad_ourselves && dp->width_arg_index != ARG_NONE) |
| 4912 | { |
| 4913 | if (!(a.arg[dp->width_arg_index].type == TYPE_INT)) |
| 4914 | abort (); |
| 4915 | prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int; |
| 4916 | } |
| 4917 | if (!prec_ourselves && dp->precision_arg_index != ARG_NONE) |
| 4918 | { |
| 4919 | if (!(a.arg[dp->precision_arg_index].type == TYPE_INT)) |
| 4920 | abort (); |
| 4921 | prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int; |
| 4922 | } |
| 4923 | |
| 4924 | #if USE_SNPRINTF |
| 4925 | /* The SNPRINTF result is appended after result[0..length]. |
| 4926 | The latter is an array of DCHAR_T; SNPRINTF appends an |
| 4927 | array of TCHAR_T to it. This is possible because |
| 4928 | sizeof (TCHAR_T) divides sizeof (DCHAR_T) and |
| 4929 | alignof (TCHAR_T) <= alignof (DCHAR_T). */ |
| 4930 | # define TCHARS_PER_DCHAR (sizeof (DCHAR_T) / sizeof (TCHAR_T)) |
| 4931 | /* Ensure that maxlen below will be >= 2. Needed on BeOS, |
| 4932 | where an snprintf() with maxlen==1 acts like sprintf(). */ |
| 4933 | ENSURE_ALLOCATION (xsum (length, |
| 4934 | (2 + TCHARS_PER_DCHAR - 1) |
| 4935 | / TCHARS_PER_DCHAR)); |
| 4936 | /* Prepare checking whether snprintf returns the count |
| 4937 | via %n. */ |
| 4938 | *(TCHAR_T *) (result + length) = '\0'; |
| 4939 | #endif |
| 4940 | |
| 4941 | orig_errno = errno; |
| 4942 | |
| 4943 | for (;;) |
| 4944 | { |
| 4945 | int count = -1; |
| 4946 | |
| 4947 | #if USE_SNPRINTF |
| 4948 | int retcount = 0; |
| 4949 | size_t maxlen = allocated - length; |
| 4950 | /* SNPRINTF can fail if its second argument is |
| 4951 | > INT_MAX. */ |
| 4952 | if (maxlen > INT_MAX / TCHARS_PER_DCHAR) |
| 4953 | maxlen = INT_MAX / TCHARS_PER_DCHAR; |
| 4954 | maxlen = maxlen * TCHARS_PER_DCHAR; |
| 4955 | # define SNPRINTF_BUF(arg) \ |
| 4956 | switch (prefix_count) \ |
| 4957 | { \ |
| 4958 | case 0: \ |
| 4959 | retcount = SNPRINTF ((TCHAR_T *) (result + length), \ |
| 4960 | maxlen, buf, \ |
| 4961 | arg, &count); \ |
| 4962 | break; \ |
| 4963 | case 1: \ |
| 4964 | retcount = SNPRINTF ((TCHAR_T *) (result + length), \ |
| 4965 | maxlen, buf, \ |
| 4966 | prefixes[0], arg, &count); \ |
| 4967 | break; \ |
| 4968 | case 2: \ |
| 4969 | retcount = SNPRINTF ((TCHAR_T *) (result + length), \ |
| 4970 | maxlen, buf, \ |
| 4971 | prefixes[0], prefixes[1], arg, \ |
| 4972 | &count); \ |
| 4973 | break; \ |
| 4974 | default: \ |
| 4975 | abort (); \ |
| 4976 | } |
| 4977 | #else |
| 4978 | # define SNPRINTF_BUF(arg) \ |
| 4979 | switch (prefix_count) \ |
| 4980 | { \ |
| 4981 | case 0: \ |
| 4982 | count = sprintf (tmp, buf, arg); \ |
| 4983 | break; \ |
| 4984 | case 1: \ |
| 4985 | count = sprintf (tmp, buf, prefixes[0], arg); \ |
| 4986 | break; \ |
| 4987 | case 2: \ |
| 4988 | count = sprintf (tmp, buf, prefixes[0], prefixes[1],\ |
| 4989 | arg); \ |
| 4990 | break; \ |
| 4991 | default: \ |
| 4992 | abort (); \ |
| 4993 | } |
| 4994 | #endif |
| 4995 | |
| 4996 | errno = 0; |
| 4997 | switch (type) |
| 4998 | { |
| 4999 | case TYPE_SCHAR: |
| 5000 | { |
| 5001 | int arg = a.arg[dp->arg_index].a.a_schar; |
| 5002 | SNPRINTF_BUF (arg); |
| 5003 | } |
| 5004 | break; |
| 5005 | case TYPE_UCHAR: |
| 5006 | { |
| 5007 | unsigned int arg = a.arg[dp->arg_index].a.a_uchar; |
| 5008 | SNPRINTF_BUF (arg); |
| 5009 | } |
| 5010 | break; |
| 5011 | case TYPE_SHORT: |
| 5012 | { |
| 5013 | int arg = a.arg[dp->arg_index].a.a_short; |
| 5014 | SNPRINTF_BUF (arg); |
| 5015 | } |
| 5016 | break; |
| 5017 | case TYPE_USHORT: |
| 5018 | { |
| 5019 | unsigned int arg = a.arg[dp->arg_index].a.a_ushort; |
| 5020 | SNPRINTF_BUF (arg); |
| 5021 | } |
| 5022 | break; |
| 5023 | case TYPE_INT: |
| 5024 | { |
| 5025 | int arg = a.arg[dp->arg_index].a.a_int; |
| 5026 | SNPRINTF_BUF (arg); |
| 5027 | } |
| 5028 | break; |
| 5029 | case TYPE_UINT: |
| 5030 | { |
| 5031 | unsigned int arg = a.arg[dp->arg_index].a.a_uint; |
| 5032 | SNPRINTF_BUF (arg); |
| 5033 | } |
| 5034 | break; |
| 5035 | case TYPE_LONGINT: |
| 5036 | { |
| 5037 | long int arg = a.arg[dp->arg_index].a.a_longint; |
| 5038 | SNPRINTF_BUF (arg); |
| 5039 | } |
| 5040 | break; |
| 5041 | case TYPE_ULONGINT: |
| 5042 | { |
| 5043 | unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint; |
| 5044 | SNPRINTF_BUF (arg); |
| 5045 | } |
| 5046 | break; |
| 5047 | #if HAVE_LONG_LONG_INT |
| 5048 | case TYPE_LONGLONGINT: |
| 5049 | { |
| 5050 | long long int arg = a.arg[dp->arg_index].a.a_longlongint; |
| 5051 | SNPRINTF_BUF (arg); |
| 5052 | } |
| 5053 | break; |
| 5054 | case TYPE_ULONGLONGINT: |
| 5055 | { |
| 5056 | unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint; |
| 5057 | SNPRINTF_BUF (arg); |
| 5058 | } |
| 5059 | break; |
| 5060 | #endif |
| 5061 | case TYPE_DOUBLE: |
| 5062 | { |
| 5063 | double arg = a.arg[dp->arg_index].a.a_double; |
| 5064 | SNPRINTF_BUF (arg); |
| 5065 | } |
| 5066 | break; |
| 5067 | case TYPE_LONGDOUBLE: |
| 5068 | { |
| 5069 | long double arg = a.arg[dp->arg_index].a.a_longdouble; |
| 5070 | SNPRINTF_BUF (arg); |
| 5071 | } |
| 5072 | break; |
| 5073 | case TYPE_CHAR: |
| 5074 | { |
| 5075 | int arg = a.arg[dp->arg_index].a.a_char; |
| 5076 | SNPRINTF_BUF (arg); |
| 5077 | } |
| 5078 | break; |
| 5079 | #if HAVE_WINT_T |
| 5080 | case TYPE_WIDE_CHAR: |
| 5081 | { |
| 5082 | wint_t arg = a.arg[dp->arg_index].a.a_wide_char; |
| 5083 | SNPRINTF_BUF (arg); |
| 5084 | } |
| 5085 | break; |
| 5086 | #endif |
| 5087 | case TYPE_STRING: |
| 5088 | { |
| 5089 | const char *arg = a.arg[dp->arg_index].a.a_string; |
| 5090 | SNPRINTF_BUF (arg); |
| 5091 | } |
| 5092 | break; |
| 5093 | #if HAVE_WCHAR_T |
| 5094 | case TYPE_WIDE_STRING: |
| 5095 | { |
| 5096 | const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string; |
| 5097 | SNPRINTF_BUF (arg); |
| 5098 | } |
| 5099 | break; |
| 5100 | #endif |
| 5101 | case TYPE_POINTER: |
| 5102 | { |
| 5103 | void *arg = a.arg[dp->arg_index].a.a_pointer; |
| 5104 | SNPRINTF_BUF (arg); |
| 5105 | } |
| 5106 | break; |
| 5107 | default: |
| 5108 | abort (); |
| 5109 | } |
| 5110 | |
| 5111 | #if USE_SNPRINTF |
| 5112 | /* Portability: Not all implementations of snprintf() |
| 5113 | are ISO C 99 compliant. Determine the number of |
| 5114 | bytes that snprintf() has produced or would have |
| 5115 | produced. */ |
| 5116 | if (count >= 0) |
| 5117 | { |
| 5118 | /* Verify that snprintf() has NUL-terminated its |
| 5119 | result. */ |
| 5120 | if (count < maxlen |
| 5121 | && ((TCHAR_T *) (result + length)) [count] != '\0') |
| 5122 | abort (); |
| 5123 | /* Portability hack. */ |
| 5124 | if (retcount > count) |
| 5125 | count = retcount; |
| 5126 | } |
| 5127 | else |
| 5128 | { |
| 5129 | /* snprintf() doesn't understand the '%n' |
| 5130 | directive. */ |
| 5131 | if (fbp[1] != '\0') |
| 5132 | { |
| 5133 | /* Don't use the '%n' directive; instead, look |
| 5134 | at the snprintf() return value. */ |
| 5135 | fbp[1] = '\0'; |
| 5136 | continue; |
| 5137 | } |
| 5138 | else |
| 5139 | { |
| 5140 | /* Look at the snprintf() return value. */ |
| 5141 | if (retcount < 0) |
| 5142 | { |
| 5143 | # if !HAVE_SNPRINTF_RETVAL_C99 |
| 5144 | /* HP-UX 10.20 snprintf() is doubly deficient: |
| 5145 | It doesn't understand the '%n' directive, |
| 5146 | *and* it returns -1 (rather than the length |
| 5147 | that would have been required) when the |
| 5148 | buffer is too small. |
| 5149 | But a failure at this point can also come |
| 5150 | from other reasons than a too small buffer, |
| 5151 | such as an invalid wide string argument to |
| 5152 | the %ls directive, or possibly an invalid |
| 5153 | floating-point argument. */ |
| 5154 | size_t tmp_length = |
| 5155 | MAX_ROOM_NEEDED (&a, dp->arg_index, |
| 5156 | dp->conversion, type, flags, |
| 5157 | width, has_precision, |
| 5158 | precision, pad_ourselves); |
| 5159 | |
| 5160 | if (maxlen < tmp_length) |
| 5161 | { |
| 5162 | /* Make more room. But try to do through |
| 5163 | this reallocation only once. */ |
| 5164 | size_t bigger_need = |
| 5165 | xsum (length, |
| 5166 | xsum (tmp_length, |
| 5167 | TCHARS_PER_DCHAR - 1) |
| 5168 | / TCHARS_PER_DCHAR); |
| 5169 | /* And always grow proportionally. |
| 5170 | (There may be several arguments, each |
| 5171 | needing a little more room than the |
| 5172 | previous one.) */ |
| 5173 | size_t bigger_need2 = |
| 5174 | xsum (xtimes (allocated, 2), 12); |
| 5175 | if (bigger_need < bigger_need2) |
| 5176 | bigger_need = bigger_need2; |
| 5177 | ENSURE_ALLOCATION (bigger_need); |
| 5178 | continue; |
| 5179 | } |
| 5180 | # endif |
| 5181 | } |
| 5182 | else |
| 5183 | count = retcount; |
| 5184 | } |
| 5185 | } |
| 5186 | #endif |
| 5187 | |
| 5188 | /* Attempt to handle failure. */ |
| 5189 | if (count < 0) |
| 5190 | { |
| 5191 | /* SNPRINTF or sprintf failed. Save and use the errno |
| 5192 | that it has set, if any. */ |
| 5193 | int saved_errno = errno; |
| 5194 | |
| 5195 | if (!(result == resultbuf || result == NULL)) |
| 5196 | free (result); |
| 5197 | if (buf_malloced != NULL) |
| 5198 | free (buf_malloced); |
| 5199 | CLEANUP (); |
| 5200 | errno = |
| 5201 | (saved_errno != 0 |
| 5202 | ? saved_errno |
| 5203 | : (dp->conversion == 'c' || dp->conversion == 's' |
| 5204 | ? EILSEQ |
| 5205 | : EINVAL)); |
| 5206 | return NULL; |
| 5207 | } |
| 5208 | |
| 5209 | #if USE_SNPRINTF |
| 5210 | /* Handle overflow of the allocated buffer. |
| 5211 | If such an overflow occurs, a C99 compliant snprintf() |
| 5212 | returns a count >= maxlen. However, a non-compliant |
| 5213 | snprintf() function returns only count = maxlen - 1. To |
| 5214 | cover both cases, test whether count >= maxlen - 1. */ |
| 5215 | if ((unsigned int) count + 1 >= maxlen) |
| 5216 | { |
| 5217 | /* If maxlen already has attained its allowed maximum, |
| 5218 | allocating more memory will not increase maxlen. |
| 5219 | Instead of looping, bail out. */ |
| 5220 | if (maxlen == INT_MAX / TCHARS_PER_DCHAR) |
| 5221 | goto overflow; |
| 5222 | else |
| 5223 | { |
| 5224 | /* Need at least (count + 1) * sizeof (TCHAR_T) |
| 5225 | bytes. (The +1 is for the trailing NUL.) |
| 5226 | But ask for (count + 2) * sizeof (TCHAR_T) |
| 5227 | bytes, so that in the next round, we likely get |
| 5228 | maxlen > (unsigned int) count + 1 |
| 5229 | and so we don't get here again. |
| 5230 | And allocate proportionally, to avoid looping |
| 5231 | eternally if snprintf() reports a too small |
| 5232 | count. */ |
| 5233 | size_t n = |
| 5234 | xmax (xsum (length, |
| 5235 | ((unsigned int) count + 2 |
| 5236 | + TCHARS_PER_DCHAR - 1) |
| 5237 | / TCHARS_PER_DCHAR), |
| 5238 | xtimes (allocated, 2)); |
| 5239 | |
| 5240 | ENSURE_ALLOCATION (n); |
| 5241 | continue; |
| 5242 | } |
| 5243 | } |
| 5244 | #endif |
| 5245 | |
| 5246 | #if NEED_PRINTF_UNBOUNDED_PRECISION |
| 5247 | if (prec_ourselves) |
| 5248 | { |
| 5249 | /* Handle the precision. */ |
| 5250 | TCHAR_T *prec_ptr = |
| 5251 | # if USE_SNPRINTF |
| 5252 | (TCHAR_T *) (result + length); |
| 5253 | # else |
| 5254 | tmp; |
| 5255 | # endif |
| 5256 | size_t prefix_count; |
| 5257 | size_t move; |
| 5258 | |
| 5259 | prefix_count = 0; |
| 5260 | /* Put the additional zeroes after the sign. */ |
| 5261 | if (count >= 1 |
| 5262 | && (*prec_ptr == '-' || *prec_ptr == '+' |
| 5263 | || *prec_ptr == ' ')) |
| 5264 | prefix_count = 1; |
| 5265 | /* Put the additional zeroes after the 0x prefix if |
| 5266 | (flags & FLAG_ALT) || (dp->conversion == 'p'). */ |
| 5267 | else if (count >= 2 |
| 5268 | && prec_ptr[0] == '0' |
| 5269 | && (prec_ptr[1] == 'x' || prec_ptr[1] == 'X')) |
| 5270 | prefix_count = 2; |
| 5271 | |
| 5272 | move = count - prefix_count; |
| 5273 | if (precision > move) |
| 5274 | { |
| 5275 | /* Insert zeroes. */ |
| 5276 | size_t insert = precision - move; |
| 5277 | TCHAR_T *prec_end; |
| 5278 | |
| 5279 | # if USE_SNPRINTF |
| 5280 | size_t n = |
| 5281 | xsum (length, |
| 5282 | (count + insert + TCHARS_PER_DCHAR - 1) |
| 5283 | / TCHARS_PER_DCHAR); |
| 5284 | length += (count + TCHARS_PER_DCHAR - 1) / TCHARS_PER_DCHAR; |
| 5285 | ENSURE_ALLOCATION (n); |
| 5286 | length -= (count + TCHARS_PER_DCHAR - 1) / TCHARS_PER_DCHAR; |
| 5287 | prec_ptr = (TCHAR_T *) (result + length); |
| 5288 | # endif |
| 5289 | |
| 5290 | prec_end = prec_ptr + count; |
| 5291 | prec_ptr += prefix_count; |
| 5292 | |
| 5293 | while (prec_end > prec_ptr) |
| 5294 | { |
| 5295 | prec_end--; |
| 5296 | prec_end[insert] = prec_end[0]; |
| 5297 | } |
| 5298 | |
| 5299 | prec_end += insert; |
| 5300 | do |
| 5301 | *--prec_end = '0'; |
| 5302 | while (prec_end > prec_ptr); |
| 5303 | |
| 5304 | count += insert; |
| 5305 | } |
| 5306 | } |
| 5307 | #endif |
| 5308 | |
| 5309 | #if !USE_SNPRINTF |
| 5310 | if (count >= tmp_length) |
| 5311 | /* tmp_length was incorrectly calculated - fix the |
| 5312 | code above! */ |
| 5313 | abort (); |
| 5314 | #endif |
| 5315 | |
| 5316 | #if !DCHAR_IS_TCHAR |
| 5317 | /* Convert from TCHAR_T[] to DCHAR_T[]. */ |
| 5318 | if (dp->conversion == 'c' || dp->conversion == 's') |
| 5319 | { |
| 5320 | /* type = TYPE_CHAR or TYPE_WIDE_CHAR or TYPE_STRING |
| 5321 | TYPE_WIDE_STRING. |
| 5322 | The result string is not certainly ASCII. */ |
| 5323 | const TCHAR_T *tmpsrc; |
| 5324 | DCHAR_T *tmpdst; |
| 5325 | size_t tmpdst_len; |
| 5326 | /* This code assumes that TCHAR_T is 'char'. */ |
| 5327 | verify (sizeof (TCHAR_T) == 1); |
| 5328 | # if USE_SNPRINTF |
| 5329 | tmpsrc = (TCHAR_T *) (result + length); |
| 5330 | # else |
| 5331 | tmpsrc = tmp; |
| 5332 | # endif |
| 5333 | tmpdst = |
| 5334 | DCHAR_CONV_FROM_ENCODING (locale_charset (), |
| 5335 | iconveh_question_mark, |
| 5336 | tmpsrc, count, |
| 5337 | NULL, |
| 5338 | NULL, &tmpdst_len); |
| 5339 | if (tmpdst == NULL) |
| 5340 | { |
| 5341 | int saved_errno = errno; |
| 5342 | if (!(result == resultbuf || result == NULL)) |
| 5343 | free (result); |
| 5344 | if (buf_malloced != NULL) |
| 5345 | free (buf_malloced); |
| 5346 | CLEANUP (); |
| 5347 | errno = saved_errno; |
| 5348 | return NULL; |
| 5349 | } |
| 5350 | ENSURE_ALLOCATION (xsum (length, tmpdst_len)); |
| 5351 | DCHAR_CPY (result + length, tmpdst, tmpdst_len); |
| 5352 | free (tmpdst); |
| 5353 | count = tmpdst_len; |
| 5354 | } |
| 5355 | else |
| 5356 | { |
| 5357 | /* The result string is ASCII. |
| 5358 | Simple 1:1 conversion. */ |
| 5359 | # if USE_SNPRINTF |
| 5360 | /* If sizeof (DCHAR_T) == sizeof (TCHAR_T), it's a |
| 5361 | no-op conversion, in-place on the array starting |
| 5362 | at (result + length). */ |
| 5363 | if (sizeof (DCHAR_T) != sizeof (TCHAR_T)) |
| 5364 | # endif |
| 5365 | { |
| 5366 | const TCHAR_T *tmpsrc; |
| 5367 | DCHAR_T *tmpdst; |
| 5368 | size_t n; |
| 5369 | |
| 5370 | # if USE_SNPRINTF |
| 5371 | if (result == resultbuf) |
| 5372 | { |
| 5373 | tmpsrc = (TCHAR_T *) (result + length); |
| 5374 | /* ENSURE_ALLOCATION will not move tmpsrc |
| 5375 | (because it's part of resultbuf). */ |
| 5376 | ENSURE_ALLOCATION (xsum (length, count)); |
| 5377 | } |
| 5378 | else |
| 5379 | { |
| 5380 | /* ENSURE_ALLOCATION will move the array |
| 5381 | (because it uses realloc(). */ |
| 5382 | ENSURE_ALLOCATION (xsum (length, count)); |
| 5383 | tmpsrc = (TCHAR_T *) (result + length); |
| 5384 | } |
| 5385 | # else |
| 5386 | tmpsrc = tmp; |
| 5387 | ENSURE_ALLOCATION (xsum (length, count)); |
| 5388 | # endif |
| 5389 | tmpdst = result + length; |
| 5390 | /* Copy backwards, because of overlapping. */ |
| 5391 | tmpsrc += count; |
| 5392 | tmpdst += count; |
| 5393 | for (n = count; n > 0; n--) |
| 5394 | *--tmpdst = (unsigned char) *--tmpsrc; |
| 5395 | } |
| 5396 | } |
| 5397 | #endif |
| 5398 | |
| 5399 | #if DCHAR_IS_TCHAR && !USE_SNPRINTF |
| 5400 | /* Make room for the result. */ |
| 5401 | if (count > allocated - length) |
| 5402 | { |
| 5403 | /* Need at least count elements. But allocate |
| 5404 | proportionally. */ |
| 5405 | size_t n = |
| 5406 | xmax (xsum (length, count), xtimes (allocated, 2)); |
| 5407 | |
| 5408 | ENSURE_ALLOCATION (n); |
| 5409 | } |
| 5410 | #endif |
| 5411 | |
| 5412 | /* Here count <= allocated - length. */ |
| 5413 | |
| 5414 | /* Perform padding. */ |
| 5415 | #if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION |
| 5416 | if (pad_ourselves && has_width) |
| 5417 | { |
| 5418 | size_t w; |
| 5419 | # if ENABLE_UNISTDIO |
| 5420 | /* Outside POSIX, it's preferrable to compare the width |
| 5421 | against the number of _characters_ of the converted |
| 5422 | value. */ |
| 5423 | w = DCHAR_MBSNLEN (result + length, count); |
| 5424 | # else |
| 5425 | /* The width is compared against the number of _bytes_ |
| 5426 | of the converted value, says POSIX. */ |
| 5427 | w = count; |
| 5428 | # endif |
| 5429 | if (w < width) |
| 5430 | { |
| 5431 | size_t pad = width - w; |
| 5432 | |
| 5433 | /* Make room for the result. */ |
| 5434 | if (xsum (count, pad) > allocated - length) |
| 5435 | { |
| 5436 | /* Need at least count + pad elements. But |
| 5437 | allocate proportionally. */ |
| 5438 | size_t n = |
| 5439 | xmax (xsum3 (length, count, pad), |
| 5440 | xtimes (allocated, 2)); |
| 5441 | |
| 5442 | # if USE_SNPRINTF |
| 5443 | length += count; |
| 5444 | ENSURE_ALLOCATION (n); |
| 5445 | length -= count; |
| 5446 | # else |
| 5447 | ENSURE_ALLOCATION (n); |
| 5448 | # endif |
| 5449 | } |
| 5450 | /* Here count + pad <= allocated - length. */ |
| 5451 | |
| 5452 | { |
| 5453 | # if !DCHAR_IS_TCHAR || USE_SNPRINTF |
| 5454 | DCHAR_T * const rp = result + length; |
| 5455 | # else |
| 5456 | DCHAR_T * const rp = tmp; |
| 5457 | # endif |
| 5458 | DCHAR_T *p = rp + count; |
| 5459 | DCHAR_T *end = p + pad; |
| 5460 | DCHAR_T *pad_ptr; |
| 5461 | # if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO |
| 5462 | if (dp->conversion == 'c' |
| 5463 | || dp->conversion == 's') |
| 5464 | /* No zero-padding for string directives. */ |
| 5465 | pad_ptr = NULL; |
| 5466 | else |
| 5467 | # endif |
| 5468 | { |
| 5469 | pad_ptr = (*rp == '-' ? rp + 1 : rp); |
| 5470 | /* No zero-padding of "inf" and "nan". */ |
| 5471 | if ((*pad_ptr >= 'A' && *pad_ptr <= 'Z') |
| 5472 | || (*pad_ptr >= 'a' && *pad_ptr <= 'z')) |
| 5473 | pad_ptr = NULL; |
| 5474 | } |
| 5475 | /* The generated string now extends from rp to p, |
| 5476 | with the zero padding insertion point being at |
| 5477 | pad_ptr. */ |
| 5478 | |
| 5479 | count = count + pad; /* = end - rp */ |
| 5480 | |
| 5481 | if (flags & FLAG_LEFT) |
| 5482 | { |
| 5483 | /* Pad with spaces on the right. */ |
| 5484 | for (; pad > 0; pad--) |
| 5485 | *p++ = ' '; |
| 5486 | } |
| 5487 | else if ((flags & FLAG_ZERO) && pad_ptr != NULL) |
| 5488 | { |
| 5489 | /* Pad with zeroes. */ |
| 5490 | DCHAR_T *q = end; |
| 5491 | |
| 5492 | while (p > pad_ptr) |
| 5493 | *--q = *--p; |
| 5494 | for (; pad > 0; pad--) |
| 5495 | *p++ = '0'; |
| 5496 | } |
| 5497 | else |
| 5498 | { |
| 5499 | /* Pad with spaces on the left. */ |
| 5500 | DCHAR_T *q = end; |
| 5501 | |
| 5502 | while (p > rp) |
| 5503 | *--q = *--p; |
| 5504 | for (; pad > 0; pad--) |
| 5505 | *p++ = ' '; |
| 5506 | } |
| 5507 | } |
| 5508 | } |
| 5509 | } |
| 5510 | #endif |
| 5511 | |
| 5512 | /* Here still count <= allocated - length. */ |
| 5513 | |
| 5514 | #if !DCHAR_IS_TCHAR || USE_SNPRINTF |
| 5515 | /* The snprintf() result did fit. */ |
| 5516 | #else |
| 5517 | /* Append the sprintf() result. */ |
| 5518 | memcpy (result + length, tmp, count * sizeof (DCHAR_T)); |
| 5519 | #endif |
| 5520 | #if !USE_SNPRINTF |
| 5521 | if (tmp != tmpbuf) |
| 5522 | free (tmp); |
| 5523 | #endif |
| 5524 | |
| 5525 | #if NEED_PRINTF_DIRECTIVE_F |
| 5526 | if (dp->conversion == 'F') |
| 5527 | { |
| 5528 | /* Convert the %f result to upper case for %F. */ |
| 5529 | DCHAR_T *rp = result + length; |
| 5530 | size_t rc; |
| 5531 | for (rc = count; rc > 0; rc--, rp++) |
| 5532 | if (*rp >= 'a' && *rp <= 'z') |
| 5533 | *rp = *rp - 'a' + 'A'; |
| 5534 | } |
| 5535 | #endif |
| 5536 | |
| 5537 | length += count; |
| 5538 | break; |
| 5539 | } |
| 5540 | errno = orig_errno; |
| 5541 | #undef pad_ourselves |
| 5542 | #undef prec_ourselves |
| 5543 | } |
| 5544 | } |
| 5545 | } |
| 5546 | |
| 5547 | /* Add the final NUL. */ |
| 5548 | ENSURE_ALLOCATION (xsum (length, 1)); |
| 5549 | result[length] = '\0'; |
| 5550 | |
| 5551 | if (result != resultbuf && length + 1 < allocated) |
| 5552 | { |
| 5553 | /* Shrink the allocated memory if possible. */ |
| 5554 | DCHAR_T *memory; |
| 5555 | |
| 5556 | memory = (DCHAR_T *) realloc (result, (length + 1) * sizeof (DCHAR_T)); |
| 5557 | if (memory != NULL) |
| 5558 | result = memory; |
| 5559 | } |
| 5560 | |
| 5561 | if (buf_malloced != NULL) |
| 5562 | free (buf_malloced); |
| 5563 | CLEANUP (); |
| 5564 | *lengthp = length; |
| 5565 | /* Note that we can produce a big string of a length > INT_MAX. POSIX |
| 5566 | says that snprintf() fails with errno = EOVERFLOW in this case, but |
| 5567 | that's only because snprintf() returns an 'int'. This function does |
| 5568 | not have this limitation. */ |
| 5569 | return result; |
| 5570 | |
| 5571 | #if USE_SNPRINTF |
| 5572 | overflow: |
| 5573 | if (!(result == resultbuf || result == NULL)) |
| 5574 | free (result); |
| 5575 | if (buf_malloced != NULL) |
| 5576 | free (buf_malloced); |
| 5577 | CLEANUP (); |
| 5578 | errno = EOVERFLOW; |
| 5579 | return NULL; |
| 5580 | #endif |
| 5581 | |
| 5582 | out_of_memory: |
| 5583 | if (!(result == resultbuf || result == NULL)) |
| 5584 | free (result); |
| 5585 | if (buf_malloced != NULL) |
| 5586 | free (buf_malloced); |
| 5587 | out_of_memory_1: |
| 5588 | CLEANUP (); |
| 5589 | errno = ENOMEM; |
| 5590 | return NULL; |
| 5591 | } |
| 5592 | } |
| 5593 | |
| 5594 | #undef MAX_ROOM_NEEDED |
| 5595 | #undef TCHARS_PER_DCHAR |
| 5596 | #undef SNPRINTF |
| 5597 | #undef USE_SNPRINTF |
| 5598 | #undef DCHAR_SET |
| 5599 | #undef DCHAR_CPY |
| 5600 | #undef PRINTF_PARSE |
| 5601 | #undef DIRECTIVES |
| 5602 | #undef DIRECTIVE |
| 5603 | #undef DCHAR_IS_TCHAR |
| 5604 | #undef TCHAR_T |
| 5605 | #undef DCHAR_T |
| 5606 | #undef FCHAR_T |
| 5607 | #undef VASNPRINTF |