1 /* $OpenBSD: vfwprintf.c,v 1.15 2015/12/28 22:08:18 mmcc Exp $ */
2 /*-
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Chris Torek.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #define CHAR_TYPE wchar_t
35 #define FUNCTION_NAME __vfwprintf
36 #define CHAR_TYPE_STRLEN wcslen
37 #define CHAR_TYPE_STRNLEN wcsnlen
38 #define CHAR_TYPE_INF L"INF"
39 #define CHAR_TYPE_inf L"inf"
40 #define CHAR_TYPE_NAN L"NAN"
41 #define CHAR_TYPE_nan L"nan"
42 #define CHAR_TYPE_ORIENTATION 1
43 #include "printf_common.h"
44
FUNCTION_NAME(FILE * fp,const CHAR_TYPE * fmt0,va_list ap)45 int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
46 int caller_errno = errno;
47 int n, n2;
48 CHAR_TYPE* cp; /* handy char pointer (short term usage) */
49 CHAR_TYPE sign; /* sign prefix (' ', '+', '-', or \0) */
50 int flags; /* flags as above */
51 int ret; /* return value accumulator */
52 int width; /* width from format (%8d), or 0 */
53 int prec; /* precision from format; <0 for N/A */
54 /*
55 * We can decompose the printed representation of floating
56 * point numbers into several parts, some of which may be empty:
57 *
58 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
59 * A B ---C--- D E F
60 *
61 * A: 'sign' holds this value if present; '\0' otherwise
62 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
63 * C: cp points to the string MMMNNN. Leading and trailing
64 * zeros are not in the string and must be added.
65 * D: expchar holds this character; '\0' if no exponent, e.g. %f
66 * F: at least two digits for decimal, at least one digit for hex
67 */
68 char* decimal_point = nullptr;
69 int signflag; /* true if float is negative */
70 union { /* floating point arguments %[aAeEfFgG] */
71 double dbl;
72 long double ldbl;
73 } fparg;
74 int expt; /* integer value of exponent */
75 char expchar; /* exponent character: [eEpP\0] */
76 char* dtoaend; /* pointer to end of converted digits */
77 int expsize; /* character count for expstr */
78 int lead; /* sig figs before decimal or group sep */
79 int ndig; /* actual number of digits returned by dtoa */
80 CHAR_TYPE expstr[MAXEXPDIG + 2]; /* buffer for exponent string: e+ZZZ */
81 char* dtoaresult = nullptr;
82
83 uintmax_t _umax; /* integer arguments %[diouxX] */
84 enum { BIN, OCT, DEC, HEX } base; /* base for %[bBdiouxX] conversion */
85 int dprec; /* a copy of prec if %[bBdiouxX], 0 otherwise */
86 int realsz; /* field size expanded by dprec */
87 int size; /* size of converted field or string */
88 const char* xdigs; /* digits for %[xX] conversion */
89 #define NIOV 8
90 struct __suio uio; /* output information: summary */
91 struct __siov iov[NIOV]; /* ... and individual io vectors */
92 struct __siov* iovp; /* for PRINT macro */
93 CHAR_TYPE buf[BUF]; /* buffer with space for digits of uintmax_t */
94 CHAR_TYPE ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
95 union arg* argtable; /* args, built due to positional arg */
96 union arg statargtable[STATIC_ARG_TBL_SIZE];
97 size_t argtablesiz;
98 int nextarg; /* 1-based argument index */
99 va_list orgap; /* original argument pointer */
100 CHAR_TYPE* convbuf; /* buffer for wide/multibyte conversion */
101
102 /*
103 * Choose PADSIZE to trade efficiency vs. size. If larger printf
104 * fields occur frequently, increase PADSIZE and make the initialisers
105 * below longer.
106 */
107 #define PADSIZE 16 /* pad chunk size */
108 static CHAR_TYPE blanks[PADSIZE] = {
109 ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '
110 };
111 static CHAR_TYPE zeroes[PADSIZE] = {
112 '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
113 };
114
115 static const char xdigs_lower[] = "0123456789abcdef";
116 static const char xdigs_upper[] = "0123456789ABCDEF";
117
118 #define PRINT(ptr, len) \
119 do { \
120 for (int n3 = 0; n3 < (len); n3++) { \
121 if ((helpers::xfputwc((ptr)[n3], fp)) == WEOF) goto error; \
122 } \
123 } while (0)
124
125 _SET_ORIENTATION(fp, CHAR_TYPE_ORIENTATION);
126
127 // Writing "" to a read only file returns EOF, not 0.
128 if (cantwrite(fp)) {
129 errno = EBADF;
130 return EOF;
131 }
132
133 // Optimize writes to stderr and other unbuffered files).
134 if ((fp->_flags & (__SNBF | __SWR | __SRW)) == (__SNBF | __SWR) && fp->_file >= 0) {
135 return (__sbprintf(fp, fmt0, ap));
136 }
137
138 CHAR_TYPE* fmt = const_cast<CHAR_TYPE*>(fmt0);
139 argtable = nullptr;
140 nextarg = 1;
141 va_copy(orgap, ap);
142 uio.uio_iov = iovp = iov;
143 uio.uio_resid = 0;
144 uio.uio_iovcnt = 0;
145 ret = 0;
146 convbuf = nullptr;
147
148 /*
149 * Scan the format for conversions (`%' character).
150 */
151 for (;;) {
152 int ch;
153 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) continue;
154 if (fmt != cp) {
155 ptrdiff_t m = fmt - cp;
156 if (m < 0 || m > INT_MAX - ret) goto overflow;
157 PRINT(cp, m);
158 ret += m;
159 }
160 if (ch == '\0') goto done;
161 fmt++; /* skip over '%' */
162
163 flags = 0;
164 dprec = 0;
165 width = 0;
166 prec = -1;
167 sign = '\0';
168 ox[1] = '\0';
169
170 rflag:
171 ch = *fmt++;
172 reswitch:
173 switch (ch) {
174 case ' ':
175 /*
176 * ``If the space and + flags both appear, the space
177 * flag will be ignored.''
178 * -- ANSI X3J11
179 */
180 if (!sign) sign = ' ';
181 goto rflag;
182 case '#':
183 flags |= ALT;
184 goto rflag;
185 case '\'':
186 /* grouping not implemented */
187 goto rflag;
188 case '*':
189 /*
190 * ``A negative field width argument is taken as a
191 * - flag followed by a positive field width.''
192 * -- ANSI X3J11
193 * They don't exclude field widths read from args.
194 */
195 GETASTER(width);
196 if (width >= 0) goto rflag;
197 if (width == INT_MIN) goto overflow;
198 width = -width;
199 __BIONIC_FALLTHROUGH;
200 case '-':
201 flags |= LADJUST;
202 goto rflag;
203 case '+':
204 sign = '+';
205 goto rflag;
206 case '.':
207 if ((ch = *fmt++) == '*') {
208 GETASTER(n);
209 prec = n < 0 ? -1 : n;
210 goto rflag;
211 }
212 n = 0;
213 while (is_digit(ch)) {
214 APPEND_DIGIT(n, ch);
215 ch = *fmt++;
216 }
217 if (ch == '$') {
218 nextarg = n;
219 if (argtable == nullptr) {
220 argtable = statargtable;
221 if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
222 ret = -1;
223 goto error;
224 }
225 }
226 goto rflag;
227 }
228 prec = n;
229 goto reswitch;
230 case '0':
231 /*
232 * ``Note that 0 is taken as a flag, not as the
233 * beginning of a field width.''
234 * -- ANSI X3J11
235 */
236 flags |= ZEROPAD;
237 goto rflag;
238 case '1':
239 case '2':
240 case '3':
241 case '4':
242 case '5':
243 case '6':
244 case '7':
245 case '8':
246 case '9':
247 n = 0;
248 do {
249 APPEND_DIGIT(n, ch);
250 ch = *fmt++;
251 } while (is_digit(ch));
252 if (ch == '$') {
253 nextarg = n;
254 if (argtable == nullptr) {
255 argtable = statargtable;
256 if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
257 ret = -1;
258 goto error;
259 }
260 }
261 goto rflag;
262 }
263 width = n;
264 goto reswitch;
265 case 'L':
266 flags |= LONGDBL;
267 goto rflag;
268 case 'h':
269 if (*fmt == 'h') {
270 fmt++;
271 flags |= CHARINT;
272 } else {
273 flags |= SHORTINT;
274 }
275 goto rflag;
276 case 'j':
277 flags |= MAXINT;
278 goto rflag;
279 case 'l':
280 if (*fmt == 'l') {
281 fmt++;
282 flags |= LLONGINT;
283 } else {
284 flags |= LONGINT;
285 }
286 goto rflag;
287 case 'q':
288 flags |= LLONGINT;
289 goto rflag;
290 case 't':
291 flags |= PTRINT;
292 goto rflag;
293 case 'z':
294 flags |= SIZEINT;
295 goto rflag;
296 case 'B':
297 case 'b':
298 _umax = UARG();
299 base = BIN;
300 if (flags & ALT && _umax != 0) ox[1] = ch;
301 goto nosign;
302 case 'C':
303 flags |= LONGINT;
304 __BIONIC_FALLTHROUGH;
305 case 'c':
306 if (flags & LONGINT)
307 *(cp = buf) = (wchar_t)GETARG(wint_t);
308 else
309 *(cp = buf) = (wchar_t)btowc(GETARG(int));
310 size = 1;
311 sign = '\0';
312 break;
313 case 'D':
314 flags |= LONGINT;
315 __BIONIC_FALLTHROUGH;
316 case 'd':
317 case 'i':
318 _umax = SARG();
319 if ((intmax_t)_umax < 0) {
320 _umax = -_umax;
321 sign = '-';
322 }
323 base = DEC;
324 goto number;
325 case 'a':
326 case 'A':
327 if (ch == 'a') {
328 ox[1] = 'x';
329 xdigs = xdigs_lower;
330 expchar = 'p';
331 } else {
332 ox[1] = 'X';
333 xdigs = xdigs_upper;
334 expchar = 'P';
335 }
336 if (prec >= 0) prec++;
337 if (dtoaresult) __freedtoa(dtoaresult);
338 if (flags & LONGDBL) {
339 fparg.ldbl = GETARG(long double);
340 dtoaresult = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend);
341 if (dtoaresult == nullptr) {
342 errno = ENOMEM;
343 goto error;
344 }
345 } else {
346 fparg.dbl = GETARG(double);
347 dtoaresult = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend);
348 if (dtoaresult == nullptr) {
349 errno = ENOMEM;
350 goto error;
351 }
352 }
353 if (prec < 0) prec = dtoaend - dtoaresult;
354 if (expt == INT_MAX) ox[1] = '\0';
355 free(convbuf);
356 cp = convbuf = helpers::mbsconv(dtoaresult, -1);
357 if (cp == nullptr) goto error;
358 ndig = dtoaend - dtoaresult;
359 goto fp_common;
360 case 'e':
361 case 'E':
362 expchar = ch;
363 if (prec < 0) /* account for digit before decpt */
364 prec = DEFPREC + 1;
365 else
366 prec++;
367 goto fp_begin;
368 case 'f':
369 case 'F':
370 expchar = '\0';
371 goto fp_begin;
372 case 'g':
373 case 'G':
374 expchar = ch - ('g' - 'e');
375 if (prec == 0) prec = 1;
376 fp_begin:
377 if (prec < 0) prec = DEFPREC;
378 if (dtoaresult) __freedtoa(dtoaresult);
379 if (flags & LONGDBL) {
380 fparg.ldbl = GETARG(long double);
381 dtoaresult = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
382 if (dtoaresult == nullptr) {
383 errno = ENOMEM;
384 goto error;
385 }
386 } else {
387 fparg.dbl = GETARG(double);
388 dtoaresult = __dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
389 if (dtoaresult == nullptr) {
390 errno = ENOMEM;
391 goto error;
392 }
393 if (expt == 9999) expt = INT_MAX;
394 }
395 free(convbuf);
396 cp = convbuf = helpers::mbsconv(dtoaresult, -1);
397 if (cp == nullptr) goto error;
398 ndig = dtoaend - dtoaresult;
399 fp_common:
400 if (signflag) sign = '-';
401 if (expt == INT_MAX) { /* inf or nan */
402 if (*cp == 'N') {
403 cp = const_cast<CHAR_TYPE*>((ch >= 'a') ? CHAR_TYPE_nan : CHAR_TYPE_NAN);
404 } else {
405 cp = const_cast<CHAR_TYPE*>((ch >= 'a') ? CHAR_TYPE_inf : CHAR_TYPE_INF);
406 }
407 size = 3;
408 flags &= ~ZEROPAD;
409 break;
410 }
411 flags |= FPT;
412 if (ch == 'g' || ch == 'G') {
413 if (expt > -4 && expt <= prec) {
414 /* Make %[gG] smell like %[fF] */
415 expchar = '\0';
416 if (flags & ALT)
417 prec -= expt;
418 else
419 prec = ndig - expt;
420 if (prec < 0) prec = 0;
421 } else {
422 /*
423 * Make %[gG] smell like %[eE], but
424 * trim trailing zeroes if no # flag.
425 */
426 if (!(flags & ALT)) prec = ndig;
427 }
428 }
429 if (expchar) {
430 expsize = exponent(expstr, expt - 1, expchar);
431 size = expsize + prec;
432 if (prec > 1 || flags & ALT) ++size;
433 } else {
434 /* space for digits before decimal point */
435 if (expt > 0)
436 size = expt;
437 else /* "0" */
438 size = 1;
439 /* space for decimal pt and following digits */
440 if (prec || flags & ALT) size += prec + 1;
441 lead = expt;
442 }
443 break;
444 case 'n':
445 __fortify_fatal("%%n not allowed on Android");
446 case 'm':
447 free(convbuf);
448 convbuf = helpers::mbsconv(strerror_r(caller_errno,
449 reinterpret_cast<char*>(buf), sizeof(buf)), prec);
450 if (convbuf == nullptr) {
451 fp->_flags |= __SERR;
452 goto error;
453 } else {
454 cp = convbuf;
455 }
456 goto string;
457 case 'O':
458 flags |= LONGINT;
459 __BIONIC_FALLTHROUGH;
460 case 'o':
461 _umax = UARG();
462 base = OCT;
463 goto nosign;
464 case 'p':
465 /*
466 * ``The argument shall be a pointer to void. The
467 * value of the pointer is converted to a sequence
468 * of printable characters, in an implementation-
469 * defined manner.''
470 * -- ANSI X3J11
471 */
472 _umax = (u_long)GETARG(void*);
473 base = HEX;
474 xdigs = xdigs_lower;
475 ox[1] = 'x';
476 goto nosign;
477 case 'S':
478 flags |= LONGINT;
479 __BIONIC_FALLTHROUGH;
480 case 's':
481 if (flags & LONGINT) {
482 if ((cp = GETARG(wchar_t*)) == nullptr) cp = const_cast<wchar_t*>(L"(null)");
483 } else {
484 char* mbsarg;
485 if ((mbsarg = GETARG(char*)) == nullptr) mbsarg = const_cast<char*>("(null)");
486 free(convbuf);
487 convbuf = helpers::mbsconv(mbsarg, prec);
488 if (convbuf == nullptr) {
489 fp->_flags |= __SERR;
490 goto error;
491 } else {
492 cp = convbuf;
493 }
494 }
495 string:
496 if (prec >= 0) {
497 size = CHAR_TYPE_STRNLEN(cp, prec);
498 } else {
499 size_t len;
500
501 if ((len = CHAR_TYPE_STRLEN(cp)) > INT_MAX) goto overflow;
502 size = (int)len;
503 }
504 sign = '\0';
505 break;
506 case 'U':
507 flags |= LONGINT;
508 __BIONIC_FALLTHROUGH;
509 case 'u':
510 _umax = UARG();
511 base = DEC;
512 goto nosign;
513 case 'w':
514 n = 0;
515 ch = *fmt++;
516 while (is_digit(ch)) {
517 APPEND_DIGIT(n, ch);
518 ch = *fmt++;
519 }
520 switch (n) {
521 case 8: {
522 flags |= CHARINT;
523 goto reswitch;
524 }
525 case 16: {
526 flags |= SHORTINT;
527 goto reswitch;
528 }
529 case 32: {
530 goto reswitch;
531 }
532 case 64: {
533 flags |= LLONGINT;
534 goto reswitch;
535 }
536 default: {
537 __fortify_fatal("%%w%d is unsupported", n);
538 break;
539 }
540 }
541 case 'X':
542 xdigs = xdigs_upper;
543 goto hex;
544 case 'x':
545 xdigs = xdigs_lower;
546 hex:
547 _umax = UARG();
548 base = HEX;
549 /* leading 0x/X only if non-zero */
550 if (flags & ALT && _umax != 0) ox[1] = ch;
551
552 /* unsigned conversions */
553 nosign:
554 sign = '\0';
555 /*
556 * ``... diouXx conversions ... if a precision is
557 * specified, the 0 flag will be ignored.''
558 * -- ANSI X3J11
559 */
560 number:
561 if ((dprec = prec) >= 0) flags &= ~ZEROPAD;
562
563 /*
564 * ``The result of converting a zero value with an
565 * explicit precision of zero is no characters.''
566 * -- ANSI X3J11
567 */
568 cp = buf + BUF;
569 if (_umax != 0 || prec != 0) {
570 /*
571 * Unsigned mod is hard, and unsigned mod
572 * by a constant is easier than that by
573 * a variable; hence this switch.
574 */
575 switch (base) {
576 case BIN:
577 do {
578 *--cp = to_char(_umax & 1);
579 _umax >>= 1;
580 } while (_umax);
581 break;
582
583 case OCT:
584 do {
585 *--cp = to_char(_umax & 7);
586 _umax >>= 3;
587 } while (_umax);
588 /* handle octal leading 0 */
589 if (flags & ALT && *cp != '0') *--cp = '0';
590 break;
591
592 case DEC:
593 /* many numbers are 1 digit */
594 while (_umax >= 10) {
595 *--cp = to_char(_umax % 10);
596 _umax /= 10;
597 }
598 *--cp = to_char(_umax);
599 break;
600
601 case HEX:
602 do {
603 *--cp = xdigs[_umax & 15];
604 _umax >>= 4;
605 } while (_umax);
606 break;
607
608 default:
609 abort();
610 }
611 }
612 size = buf + BUF - cp;
613 if (size > BUF) abort(); /* should never happen */
614 break;
615 default: /* "%?" prints ?, unless ? is NUL */
616 if (ch == '\0') goto done;
617 /* pretend it was %c with argument ch */
618 cp = buf;
619 *cp = ch;
620 size = 1;
621 sign = '\0';
622 break;
623 }
624
625 /*
626 * All reasonable formats wind up here. At this point, `cp'
627 * points to a string which (if not flags&LADJUST) should be
628 * padded out to `width' places. If flags&ZEROPAD, it should
629 * first be prefixed by any sign or other prefix; otherwise,
630 * it should be blank padded before the prefix is emitted.
631 * After any left-hand padding and prefixing, emit zeroes
632 * required by a decimal %[bBdiouxX] precision, then print the
633 * string proper, then emit zeroes required by any leftover
634 * floating precision; finally, if LADJUST, pad with blanks.
635 *
636 * Compute actual size, so we know how much to pad.
637 * size excludes decimal prec; realsz includes it.
638 */
639 realsz = dprec > size ? dprec : size;
640 if (sign) realsz++;
641 if (ox[1]) realsz += 2;
642
643 /* right-adjusting blank padding */
644 if ((flags & (LADJUST | ZEROPAD)) == 0) PAD(width - realsz, blanks);
645
646 /* prefix */
647 if (sign) PRINT(&sign, 1);
648 if (ox[1]) { /* ox[1] is either x, X, or \0 */
649 ox[0] = '0';
650 PRINT(ox, 2);
651 }
652
653 /* right-adjusting zero padding */
654 if ((flags & (LADJUST | ZEROPAD)) == ZEROPAD) PAD(width - realsz, zeroes);
655
656 /* leading zeroes from decimal precision */
657 PAD(dprec - size, zeroes);
658
659 /* the string or number proper */
660 if ((flags & FPT) == 0) {
661 PRINT(cp, size);
662 } else { /* glue together f_p fragments */
663 if (decimal_point == nullptr) decimal_point = nl_langinfo(RADIXCHAR);
664 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
665 if (expt <= 0) {
666 PRINT(zeroes, 1);
667 if (prec || flags & ALT) PRINT(decimal_point, 1);
668 PAD(-expt, zeroes);
669 /* already handled initial 0's */
670 prec += expt;
671 } else {
672 PRINTANDPAD(cp, convbuf + ndig, lead, zeroes);
673 cp += lead;
674 if (prec || flags & ALT) PRINT(decimal_point, 1);
675 }
676 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
677 } else { /* %[eE] or sufficiently long %[gG] */
678 if (prec > 1 || flags & ALT) {
679 buf[0] = *cp++;
680 buf[1] = *decimal_point;
681 PRINT(buf, 2);
682 PRINT(cp, ndig - 1);
683 PAD(prec - ndig, zeroes);
684 } else { /* XeYYY */
685 PRINT(cp, 1);
686 }
687 PRINT(expstr, expsize);
688 }
689 }
690 /* left-adjusting padding (always blank) */
691 if (flags & LADJUST) PAD(width - realsz, blanks);
692
693 /* finally, adjust ret */
694 if (width < realsz) width = realsz;
695 if (width > INT_MAX - ret) goto overflow;
696 ret += width;
697 }
698 done:
699 error:
700 va_end(orgap);
701 if (__sferror(fp)) ret = -1;
702 goto finish;
703
704 overflow:
705 errno = ENOMEM;
706 ret = -1;
707
708 finish:
709 free(convbuf);
710 if (dtoaresult) __freedtoa(dtoaresult);
711 if (argtable != nullptr && argtable != statargtable) {
712 munmap(argtable, argtablesiz);
713 argtable = nullptr;
714 }
715 return (ret);
716 }
717