Line data Source code
1 : /*
2 : * Copyright (c) 1983, 1995, 1996 Eric P. Allman
3 : * Copyright (c) 1988, 1993
4 : * The Regents of the University of California. All rights reserved.
5 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
6 : *
7 : * Redistribution and use in source and binary forms, with or without
8 : * modification, are permitted provided that the following conditions
9 : * are met:
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : * 2. Redistributions in binary form must reproduce the above copyright
13 : * notice, this list of conditions and the following disclaimer in the
14 : * documentation and/or other materials provided with the distribution.
15 : * 3. Neither the name of the University nor the names of its contributors
16 : * may be used to endorse or promote products derived from this software
17 : * without specific prior written permission.
18 : *
19 : * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 : * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 : * SUCH DAMAGE.
30 : *
31 : * src/port/snprintf.c
32 : */
33 :
34 : #include "c.h"
35 :
36 : #include <math.h>
37 :
38 : /*
39 : * We used to use the platform's NL_ARGMAX here, but that's a bad idea,
40 : * first because the point of this module is to remove platform dependencies
41 : * not perpetuate them, and second because some platforms use ridiculously
42 : * large values, leading to excessive stack consumption in dopr().
43 : */
44 : #define PG_NL_ARGMAX 31
45 :
46 :
47 : /*
48 : * SNPRINTF, VSNPRINTF and friends
49 : *
50 : * These versions have been grabbed off the net. They have been
51 : * cleaned up to compile properly and support for most of the C99
52 : * specification has been added. Remaining unimplemented features are:
53 : *
54 : * 1. No locale support: the radix character is always '.' and the '
55 : * (single quote) format flag is ignored.
56 : *
57 : * 2. No support for the "%n" format specification.
58 : *
59 : * 3. No support for wide characters ("lc" and "ls" formats).
60 : *
61 : * 4. No support for "long double" ("Lf" and related formats).
62 : *
63 : * 5. Space and '#' flags are not implemented.
64 : *
65 : * In addition, we support some extensions over C99:
66 : *
67 : * 1. Argument order control through "%n$" and "*n$", as required by POSIX.
68 : *
69 : * 2. "%m" expands to the value of strerror(errno), where errno is the
70 : * value that variable had at the start of the call. This is a glibc
71 : * extension, but a very useful one.
72 : *
73 : *
74 : * Historically the result values of sprintf/snprintf varied across platforms.
75 : * This implementation now follows the C99 standard:
76 : *
77 : * 1. -1 is returned if an error is detected in the format string, or if
78 : * a write to the target stream fails (as reported by fwrite). Note that
79 : * overrunning snprintf's target buffer is *not* an error.
80 : *
81 : * 2. For successful writes to streams, the actual number of bytes written
82 : * to the stream is returned.
83 : *
84 : * 3. For successful sprintf/snprintf, the number of bytes that would have
85 : * been written to an infinite-size buffer (excluding the trailing '\0')
86 : * is returned. snprintf will truncate its output to fit in the buffer
87 : * (ensuring a trailing '\0' unless count == 0), but this is not reflected
88 : * in the function result.
89 : *
90 : * snprintf buffer overrun can be detected by checking for function result
91 : * greater than or equal to the supplied count.
92 : */
93 :
94 : /**************************************************************
95 : * Original:
96 : * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
97 : * A bombproof version of doprnt (dopr) included.
98 : * Sigh. This sort of thing is always nasty do deal with. Note that
99 : * the version here does not include floating point. (now it does ... tgl)
100 : **************************************************************/
101 :
102 : /* Prevent recursion */
103 : #undef vsnprintf
104 : #undef snprintf
105 : #undef vsprintf
106 : #undef sprintf
107 : #undef vfprintf
108 : #undef fprintf
109 : #undef vprintf
110 : #undef printf
111 :
112 : /*
113 : * Info about where the formatted output is going.
114 : *
115 : * dopr and subroutines will not write at/past bufend, but snprintf
116 : * reserves one byte, ensuring it may place the trailing '\0' there.
117 : *
118 : * In snprintf, we use nchars to count the number of bytes dropped on the
119 : * floor due to buffer overrun. The correct result of snprintf is thus
120 : * (bufptr - bufstart) + nchars. (This isn't as inconsistent as it might
121 : * seem: nchars is the number of emitted bytes that are not in the buffer now,
122 : * either because we sent them to the stream or because we couldn't fit them
123 : * into the buffer to begin with.)
124 : */
125 : typedef struct
126 : {
127 : char *bufptr; /* next buffer output position */
128 : char *bufstart; /* first buffer element */
129 : char *bufend; /* last+1 buffer element, or NULL */
130 : /* bufend == NULL is for sprintf, where we assume buf is big enough */
131 : FILE *stream; /* eventual output destination, or NULL */
132 : int nchars; /* # chars sent to stream, or dropped */
133 : bool failed; /* call is a failure; errno is set */
134 : } PrintfTarget;
135 :
136 : /*
137 : * Info about the type and value of a formatting parameter. Note that we
138 : * don't currently support "long double", "wint_t", or "wchar_t *" data,
139 : * nor the '%n' formatting code; else we'd need more types. Also, at this
140 : * level we need not worry about signed vs unsigned values.
141 : */
142 : typedef enum
143 : {
144 : ATYPE_NONE = 0,
145 : ATYPE_INT,
146 : ATYPE_LONG,
147 : ATYPE_LONGLONG,
148 : ATYPE_DOUBLE,
149 : ATYPE_CHARPTR
150 : } PrintfArgType;
151 :
152 : typedef union
153 : {
154 : int i;
155 : long l;
156 : long long ll;
157 : double d;
158 : char *cptr;
159 : } PrintfArgValue;
160 :
161 :
162 : static void flushbuffer(PrintfTarget *target);
163 : static void dopr(PrintfTarget *target, const char *format, va_list args);
164 :
165 :
166 : /*
167 : * Externally visible entry points.
168 : *
169 : * All of these are just wrappers around dopr(). Note it's essential that
170 : * they not change the value of "errno" before reaching dopr().
171 : */
172 :
173 : int
174 82090104 : pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args)
175 : {
176 : PrintfTarget target;
177 : char onebyte[1];
178 :
179 : /*
180 : * C99 allows the case str == NULL when count == 0. Rather than
181 : * special-casing this situation further down, we substitute a one-byte
182 : * local buffer. Callers cannot tell, since the function result doesn't
183 : * depend on count.
184 : */
185 82090104 : if (count == 0)
186 : {
187 253790 : str = onebyte;
188 253790 : count = 1;
189 : }
190 82090104 : target.bufstart = target.bufptr = str;
191 82090104 : target.bufend = str + count - 1;
192 82090104 : target.stream = NULL;
193 82090104 : target.nchars = 0;
194 82090104 : target.failed = false;
195 82090104 : dopr(&target, fmt, args);
196 82090106 : *(target.bufptr) = '\0';
197 164180212 : return target.failed ? -1 : (target.bufptr - target.bufstart
198 82090106 : + target.nchars);
199 : }
200 :
201 : int
202 44918262 : pg_snprintf(char *str, size_t count, const char *fmt,...)
203 : {
204 : int len;
205 : va_list args;
206 :
207 44918262 : va_start(args, fmt);
208 44918262 : len = pg_vsnprintf(str, count, fmt, args);
209 44918264 : va_end(args);
210 44918264 : return len;
211 : }
212 :
213 : int
214 18744854 : pg_vsprintf(char *str, const char *fmt, va_list args)
215 : {
216 : PrintfTarget target;
217 :
218 18744854 : target.bufstart = target.bufptr = str;
219 18744854 : target.bufend = NULL;
220 18744854 : target.stream = NULL;
221 18744854 : target.nchars = 0; /* not really used in this case */
222 18744854 : target.failed = false;
223 18744854 : dopr(&target, fmt, args);
224 18744844 : *(target.bufptr) = '\0';
225 37489688 : return target.failed ? -1 : (target.bufptr - target.bufstart
226 18744844 : + target.nchars);
227 : }
228 :
229 : int
230 18744850 : pg_sprintf(char *str, const char *fmt,...)
231 : {
232 : int len;
233 : va_list args;
234 :
235 18744850 : va_start(args, fmt);
236 18744850 : len = pg_vsprintf(str, fmt, args);
237 18744844 : va_end(args);
238 18744844 : return len;
239 : }
240 :
241 : int
242 4632576 : pg_vfprintf(FILE *stream, const char *fmt, va_list args)
243 : {
244 : PrintfTarget target;
245 : char buffer[1024]; /* size is arbitrary */
246 :
247 4632576 : if (stream == NULL)
248 : {
249 0 : errno = EINVAL;
250 0 : return -1;
251 : }
252 4632576 : target.bufstart = target.bufptr = buffer;
253 4632576 : target.bufend = buffer + sizeof(buffer); /* use the whole buffer */
254 4632576 : target.stream = stream;
255 4632576 : target.nchars = 0;
256 4632576 : target.failed = false;
257 4632576 : dopr(&target, fmt, args);
258 : /* dump any remaining buffer contents */
259 4632576 : flushbuffer(&target);
260 4632576 : return target.failed ? -1 : target.nchars;
261 : }
262 :
263 : int
264 2384566 : pg_fprintf(FILE *stream, const char *fmt,...)
265 : {
266 : int len;
267 : va_list args;
268 :
269 2384566 : va_start(args, fmt);
270 2384566 : len = pg_vfprintf(stream, fmt, args);
271 2384566 : va_end(args);
272 2384566 : return len;
273 : }
274 :
275 : int
276 0 : pg_vprintf(const char *fmt, va_list args)
277 : {
278 0 : return pg_vfprintf(stdout, fmt, args);
279 : }
280 :
281 : int
282 2224744 : pg_printf(const char *fmt,...)
283 : {
284 : int len;
285 : va_list args;
286 :
287 2224744 : va_start(args, fmt);
288 2224744 : len = pg_vfprintf(stdout, fmt, args);
289 2224744 : va_end(args);
290 2224744 : return len;
291 : }
292 :
293 : /*
294 : * Attempt to write the entire buffer to target->stream; discard the entire
295 : * buffer in any case. Call this only when target->stream is defined.
296 : */
297 : static void
298 4633180 : flushbuffer(PrintfTarget *target)
299 : {
300 4633180 : size_t nc = target->bufptr - target->bufstart;
301 :
302 : /*
303 : * Don't write anything if we already failed; this is to ensure we
304 : * preserve the original failure's errno.
305 : */
306 4633180 : if (!target->failed && nc > 0)
307 : {
308 : size_t written;
309 :
310 4366958 : written = fwrite(target->bufstart, 1, nc, target->stream);
311 4366958 : target->nchars += written;
312 4366958 : if (written != nc)
313 0 : target->failed = true;
314 : }
315 4633180 : target->bufptr = target->bufstart;
316 4633180 : }
317 :
318 :
319 : static bool find_arguments(const char *format, va_list args,
320 : PrintfArgValue *argvalues);
321 : static void fmtstr(const char *value, int leftjust, int minlen, int maxwidth,
322 : int pointflag, PrintfTarget *target);
323 : static void fmtptr(const void *value, PrintfTarget *target);
324 : static void fmtint(long long value, char type, int forcesign,
325 : int leftjust, int minlen, int zpad, int precision, int pointflag,
326 : PrintfTarget *target);
327 : static void fmtchar(int value, int leftjust, int minlen, PrintfTarget *target);
328 : static void fmtfloat(double value, char type, int forcesign,
329 : int leftjust, int minlen, int zpad, int precision, int pointflag,
330 : PrintfTarget *target);
331 : static void dostr(const char *str, int slen, PrintfTarget *target);
332 : static void dopr_outch(int c, PrintfTarget *target);
333 : static void dopr_outchmulti(int c, int slen, PrintfTarget *target);
334 : static int adjust_sign(int is_negative, int forcesign, int *signvalue);
335 : static int compute_padlen(int minlen, int vallen, int leftjust);
336 : static void leading_pad(int zpad, int signvalue, int *padlen,
337 : PrintfTarget *target);
338 : static void trailing_pad(int padlen, PrintfTarget *target);
339 :
340 : /*
341 : * If strchrnul exists (it's a glibc-ism, but since adopted by some other
342 : * platforms), it's a good bit faster than the equivalent manual loop.
343 : * Use it if possible, and if it doesn't exist, use this replacement.
344 : *
345 : * Note: glibc declares this as returning "char *", but that would require
346 : * casting away const internally, so we don't follow that detail.
347 : *
348 : * Note: macOS has this too as of Sequoia 15.4, but it's hidden behind
349 : * a deployment-target check that causes compile errors if the deployment
350 : * target isn't high enough. So !HAVE_DECL_STRCHRNUL may mean "yes it's
351 : * declared, but it doesn't compile". To avoid failing in that scenario,
352 : * use a macro to avoid matching <string.h>'s name.
353 : */
354 : #if !HAVE_DECL_STRCHRNUL
355 :
356 : #define strchrnul pg_strchrnul
357 :
358 : static inline const char *
359 : strchrnul(const char *s, int c)
360 : {
361 : while (*s != '\0' && *s != c)
362 : s++;
363 : return s;
364 : }
365 :
366 : #endif /* !HAVE_DECL_STRCHRNUL */
367 :
368 :
369 : /*
370 : * dopr(): the guts of *printf for all cases.
371 : */
372 : static void
373 105467530 : dopr(PrintfTarget *target, const char *format, va_list args)
374 : {
375 105467530 : int save_errno = errno;
376 105467530 : const char *first_pct = NULL;
377 : int ch;
378 : bool have_dollar;
379 : bool have_star;
380 : bool afterstar;
381 : int accum;
382 : int longlongflag;
383 : int longflag;
384 : int pointflag;
385 : int leftjust;
386 : int fieldwidth;
387 : int precision;
388 : int zpad;
389 : int forcesign;
390 : int fmtpos;
391 : int cvalue;
392 : long long numvalue;
393 : double fvalue;
394 : const char *strvalue;
395 : PrintfArgValue argvalues[PG_NL_ARGMAX + 1];
396 :
397 : /*
398 : * Initially, we suppose the format string does not use %n$. The first
399 : * time we come to a conversion spec that has that, we'll call
400 : * find_arguments() to check for consistent use of %n$ and fill the
401 : * argvalues array with the argument values in the correct order.
402 : */
403 105467530 : have_dollar = false;
404 :
405 253019652 : while (*format != '\0')
406 : {
407 : /* Locate next conversion specifier */
408 162297328 : if (*format != '%')
409 : {
410 : /* Scan to next '%' or end of string */
411 92095920 : const char *next_pct = strchrnul(format + 1, '%');
412 :
413 : /* Dump literal data we just scanned over */
414 92095920 : dostr(format, next_pct - format, target);
415 92095920 : if (target->failed)
416 0 : break;
417 :
418 92095920 : if (*next_pct == '\0')
419 14745196 : break;
420 77350724 : format = next_pct;
421 : }
422 :
423 : /*
424 : * Remember start of first conversion spec; if we find %n$, then it's
425 : * sufficient for find_arguments() to start here, without rescanning
426 : * earlier literal text.
427 : */
428 147552132 : if (first_pct == NULL)
429 104193060 : first_pct = format;
430 :
431 : /* Process conversion spec starting at *format */
432 147552132 : format++;
433 :
434 : /* Fast path for conversion spec that is exactly %s */
435 147552132 : if (*format == 's')
436 : {
437 42599540 : format++;
438 42599540 : strvalue = va_arg(args, char *);
439 42599540 : if (strvalue == NULL)
440 8 : strvalue = "(null)";
441 42599540 : dostr(strvalue, strlen(strvalue), target);
442 42599540 : if (target->failed)
443 0 : break;
444 42599540 : continue;
445 : }
446 :
447 104952592 : fieldwidth = precision = zpad = leftjust = forcesign = 0;
448 104952592 : longflag = longlongflag = pointflag = 0;
449 104952592 : fmtpos = accum = 0;
450 104952592 : have_star = afterstar = false;
451 78235342 : nextch2:
452 183187934 : ch = *format++;
453 183187934 : switch (ch)
454 : {
455 1102196 : case '-':
456 1102196 : leftjust = 1;
457 1102196 : goto nextch2;
458 282 : case '+':
459 282 : forcesign = 1;
460 282 : goto nextch2;
461 31815456 : case '0':
462 : /* set zero padding if no nonzero digits yet */
463 31815456 : if (accum == 0 && !pointflag)
464 31247376 : zpad = '0';
465 : /* FALL THRU */
466 : case '1':
467 : case '2':
468 : case '3':
469 : case '4':
470 : case '5':
471 : case '6':
472 : case '7':
473 : case '8':
474 : case '9':
475 66639342 : accum = accum * 10 + (ch - '0');
476 66639342 : goto nextch2;
477 992370 : case '.':
478 992370 : if (have_star)
479 968 : have_star = false;
480 : else
481 991402 : fieldwidth = accum;
482 992370 : pointflag = 1;
483 992370 : accum = 0;
484 992370 : goto nextch2;
485 1460682 : case '*':
486 1460682 : if (have_dollar)
487 : {
488 : /*
489 : * We'll process value after reading n$. Note it's OK to
490 : * assume have_dollar is set correctly, because in a valid
491 : * format string the initial % must have had n$ if * does.
492 : */
493 0 : afterstar = true;
494 : }
495 : else
496 : {
497 : /* fetch and process value now */
498 1460682 : int starval = va_arg(args, int);
499 :
500 1460682 : if (pointflag)
501 : {
502 61162 : precision = starval;
503 61162 : if (precision < 0)
504 : {
505 0 : precision = 0;
506 0 : pointflag = 0;
507 : }
508 : }
509 : else
510 : {
511 1399520 : fieldwidth = starval;
512 1399520 : if (fieldwidth < 0)
513 : {
514 5646 : leftjust = 1;
515 5646 : fieldwidth = -fieldwidth;
516 : }
517 : }
518 : }
519 1460682 : have_star = true;
520 1460682 : accum = 0;
521 1460682 : goto nextch2;
522 0 : case '$':
523 : /* First dollar sign? */
524 0 : if (!have_dollar)
525 : {
526 : /* Yup, so examine all conversion specs in format */
527 0 : if (!find_arguments(first_pct, args, argvalues))
528 4 : goto bad_format;
529 0 : have_dollar = true;
530 : }
531 0 : if (afterstar)
532 : {
533 : /* fetch and process star value */
534 0 : int starval = argvalues[accum].i;
535 :
536 0 : if (pointflag)
537 : {
538 0 : precision = starval;
539 0 : if (precision < 0)
540 : {
541 0 : precision = 0;
542 0 : pointflag = 0;
543 : }
544 : }
545 : else
546 : {
547 0 : fieldwidth = starval;
548 0 : if (fieldwidth < 0)
549 : {
550 0 : leftjust = 1;
551 0 : fieldwidth = -fieldwidth;
552 : }
553 : }
554 0 : afterstar = false;
555 : }
556 : else
557 0 : fmtpos = accum;
558 0 : accum = 0;
559 0 : goto nextch2;
560 7692868 : case 'l':
561 7692868 : if (longflag)
562 8832 : longlongflag = 1;
563 : else
564 7684036 : longflag = 1;
565 7692868 : goto nextch2;
566 347518 : case 'z':
567 : #if SIZEOF_SIZE_T == SIZEOF_LONG
568 347518 : longflag = 1;
569 : #elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
570 : longlongflag = 1;
571 : #else
572 : #error "cannot find integer type of the same size as size_t"
573 : #endif
574 347518 : goto nextch2;
575 88 : case 'h':
576 : case '\'':
577 : /* ignore these */
578 88 : goto nextch2;
579 41390626 : case 'd':
580 : case 'i':
581 41390626 : if (!have_star)
582 : {
583 41349514 : if (pointflag)
584 0 : precision = accum;
585 : else
586 41349514 : fieldwidth = accum;
587 : }
588 41390626 : if (have_dollar)
589 : {
590 0 : if (longlongflag)
591 0 : numvalue = argvalues[fmtpos].ll;
592 0 : else if (longflag)
593 0 : numvalue = argvalues[fmtpos].l;
594 : else
595 0 : numvalue = argvalues[fmtpos].i;
596 : }
597 : else
598 : {
599 41390626 : if (longlongflag)
600 8796 : numvalue = va_arg(args, long long);
601 41381830 : else if (longflag)
602 6644438 : numvalue = va_arg(args, long);
603 : else
604 34737392 : numvalue = va_arg(args, int);
605 : }
606 41390626 : fmtint(numvalue, ch, forcesign, leftjust, fieldwidth, zpad,
607 : precision, pointflag, target);
608 41390622 : break;
609 59628754 : case 'o':
610 : case 'u':
611 : case 'x':
612 : case 'X':
613 59628754 : if (!have_star)
614 : {
615 59628754 : if (pointflag)
616 0 : precision = accum;
617 : else
618 59628754 : fieldwidth = accum;
619 : }
620 59628754 : if (have_dollar)
621 : {
622 0 : if (longlongflag)
623 0 : numvalue = (unsigned long long) argvalues[fmtpos].ll;
624 0 : else if (longflag)
625 0 : numvalue = (unsigned long) argvalues[fmtpos].l;
626 : else
627 0 : numvalue = (unsigned int) argvalues[fmtpos].i;
628 : }
629 : else
630 : {
631 59628754 : if (longlongflag)
632 36 : numvalue = (unsigned long long) va_arg(args, long long);
633 59628718 : else if (longflag)
634 1378284 : numvalue = (unsigned long) va_arg(args, long);
635 : else
636 58250434 : numvalue = (unsigned int) va_arg(args, int);
637 : }
638 59628754 : fmtint(numvalue, ch, forcesign, leftjust, fieldwidth, zpad,
639 : precision, pointflag, target);
640 59628754 : break;
641 40554 : case 'c':
642 40554 : if (!have_star)
643 : {
644 40512 : if (pointflag)
645 0 : precision = accum;
646 : else
647 40512 : fieldwidth = accum;
648 : }
649 40554 : if (have_dollar)
650 0 : cvalue = (unsigned char) argvalues[fmtpos].i;
651 : else
652 40554 : cvalue = (unsigned char) va_arg(args, int);
653 40554 : fmtchar(cvalue, leftjust, fieldwidth, target);
654 40554 : break;
655 1967230 : case 's':
656 1967230 : if (!have_star)
657 : {
658 589058 : if (pointflag)
659 0 : precision = accum;
660 : else
661 589058 : fieldwidth = accum;
662 : }
663 1967230 : if (have_dollar)
664 0 : strvalue = argvalues[fmtpos].cptr;
665 : else
666 1967230 : strvalue = va_arg(args, char *);
667 : /* If string is NULL, silently substitute "(null)" */
668 1967230 : if (strvalue == NULL)
669 0 : strvalue = "(null)";
670 1967230 : fmtstr(strvalue, leftjust, fieldwidth, precision, pointflag,
671 : target);
672 1967230 : break;
673 164 : case 'p':
674 : /* fieldwidth/leftjust are ignored ... */
675 164 : if (have_dollar)
676 0 : strvalue = argvalues[fmtpos].cptr;
677 : else
678 164 : strvalue = va_arg(args, char *);
679 164 : fmtptr((const void *) strvalue, target);
680 164 : break;
681 1424234 : case 'e':
682 : case 'E':
683 : case 'f':
684 : case 'g':
685 : case 'G':
686 1424234 : if (!have_star)
687 : {
688 1383846 : if (pointflag)
689 931208 : precision = accum;
690 : else
691 452638 : fieldwidth = accum;
692 : }
693 1424234 : if (have_dollar)
694 0 : fvalue = argvalues[fmtpos].d;
695 : else
696 1424234 : fvalue = va_arg(args, double);
697 1424234 : fmtfloat(fvalue, ch, forcesign, leftjust,
698 : fieldwidth, zpad,
699 : precision, pointflag,
700 : target);
701 1424234 : break;
702 488 : case 'm':
703 : {
704 : char errbuf[PG_STRERROR_R_BUFLEN];
705 488 : const char *errm = strerror_r(save_errno,
706 : errbuf, sizeof(errbuf));
707 :
708 488 : dostr(errm, strlen(errm), target);
709 : }
710 486 : break;
711 500538 : case '%':
712 500538 : dopr_outch('%', target);
713 500538 : break;
714 0 : default:
715 :
716 : /*
717 : * Anything else --- in particular, '\0' indicating end of
718 : * format string --- is bogus.
719 : */
720 0 : goto bad_format;
721 : }
722 :
723 : /* Check for failure after each conversion spec */
724 104952582 : if (target->failed)
725 0 : break;
726 : }
727 :
728 105467520 : return;
729 :
730 4 : bad_format:
731 4 : errno = EINVAL;
732 4 : target->failed = true;
733 : }
734 :
735 : /*
736 : * find_arguments(): sort out the arguments for a format spec with %n$
737 : *
738 : * If format is valid, return true and fill argvalues[i] with the value
739 : * for the conversion spec that has %i$ or *i$. Else return false.
740 : */
741 : static bool
742 0 : find_arguments(const char *format, va_list args,
743 : PrintfArgValue *argvalues)
744 : {
745 : int ch;
746 : bool afterstar;
747 : int accum;
748 : int longlongflag;
749 : int longflag;
750 : int fmtpos;
751 : int i;
752 0 : int last_dollar = 0; /* Init to "no dollar arguments known" */
753 0 : PrintfArgType argtypes[PG_NL_ARGMAX + 1] = {0};
754 :
755 : /*
756 : * This loop must accept the same format strings as the one in dopr().
757 : * However, we don't need to analyze them to the same level of detail.
758 : *
759 : * Since we're only called if there's a dollar-type spec somewhere, we can
760 : * fail immediately if we find a non-dollar spec. Per the C99 standard,
761 : * all argument references in the format string must be one or the other.
762 : */
763 0 : while (*format != '\0')
764 : {
765 : /* Locate next conversion specifier */
766 0 : if (*format != '%')
767 : {
768 : /* Unlike dopr, we can just quit if there's no more specifiers */
769 0 : format = strchr(format + 1, '%');
770 0 : if (format == NULL)
771 0 : break;
772 : }
773 :
774 : /* Process conversion spec starting at *format */
775 0 : format++;
776 0 : longflag = longlongflag = 0;
777 0 : fmtpos = accum = 0;
778 0 : afterstar = false;
779 0 : nextch1:
780 0 : ch = *format++;
781 0 : switch (ch)
782 : {
783 0 : case '-':
784 : case '+':
785 0 : goto nextch1;
786 0 : case '0':
787 : case '1':
788 : case '2':
789 : case '3':
790 : case '4':
791 : case '5':
792 : case '6':
793 : case '7':
794 : case '8':
795 : case '9':
796 0 : accum = accum * 10 + (ch - '0');
797 0 : goto nextch1;
798 0 : case '.':
799 0 : accum = 0;
800 0 : goto nextch1;
801 0 : case '*':
802 0 : if (afterstar)
803 0 : return false; /* previous star missing dollar */
804 0 : afterstar = true;
805 0 : accum = 0;
806 0 : goto nextch1;
807 0 : case '$':
808 0 : if (accum <= 0 || accum > PG_NL_ARGMAX)
809 0 : return false;
810 0 : if (afterstar)
811 : {
812 0 : if (argtypes[accum] &&
813 0 : argtypes[accum] != ATYPE_INT)
814 0 : return false;
815 0 : argtypes[accum] = ATYPE_INT;
816 0 : last_dollar = Max(last_dollar, accum);
817 0 : afterstar = false;
818 : }
819 : else
820 0 : fmtpos = accum;
821 0 : accum = 0;
822 0 : goto nextch1;
823 0 : case 'l':
824 0 : if (longflag)
825 0 : longlongflag = 1;
826 : else
827 0 : longflag = 1;
828 0 : goto nextch1;
829 0 : case 'z':
830 : #if SIZEOF_SIZE_T == SIZEOF_LONG
831 0 : longflag = 1;
832 : #elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
833 : longlongflag = 1;
834 : #else
835 : #error "cannot find integer type of the same size as size_t"
836 : #endif
837 0 : goto nextch1;
838 0 : case 'h':
839 : case '\'':
840 : /* ignore these */
841 0 : goto nextch1;
842 0 : case 'd':
843 : case 'i':
844 : case 'o':
845 : case 'u':
846 : case 'x':
847 : case 'X':
848 0 : if (fmtpos)
849 : {
850 : PrintfArgType atype;
851 :
852 0 : if (longlongflag)
853 0 : atype = ATYPE_LONGLONG;
854 0 : else if (longflag)
855 0 : atype = ATYPE_LONG;
856 : else
857 0 : atype = ATYPE_INT;
858 0 : if (argtypes[fmtpos] &&
859 0 : argtypes[fmtpos] != atype)
860 0 : return false;
861 0 : argtypes[fmtpos] = atype;
862 0 : last_dollar = Max(last_dollar, fmtpos);
863 : }
864 : else
865 0 : return false; /* non-dollar conversion spec */
866 0 : break;
867 0 : case 'c':
868 0 : if (fmtpos)
869 : {
870 0 : if (argtypes[fmtpos] &&
871 0 : argtypes[fmtpos] != ATYPE_INT)
872 0 : return false;
873 0 : argtypes[fmtpos] = ATYPE_INT;
874 0 : last_dollar = Max(last_dollar, fmtpos);
875 : }
876 : else
877 0 : return false; /* non-dollar conversion spec */
878 0 : break;
879 0 : case 's':
880 : case 'p':
881 0 : if (fmtpos)
882 : {
883 0 : if (argtypes[fmtpos] &&
884 0 : argtypes[fmtpos] != ATYPE_CHARPTR)
885 0 : return false;
886 0 : argtypes[fmtpos] = ATYPE_CHARPTR;
887 0 : last_dollar = Max(last_dollar, fmtpos);
888 : }
889 : else
890 0 : return false; /* non-dollar conversion spec */
891 0 : break;
892 0 : case 'e':
893 : case 'E':
894 : case 'f':
895 : case 'g':
896 : case 'G':
897 0 : if (fmtpos)
898 : {
899 0 : if (argtypes[fmtpos] &&
900 0 : argtypes[fmtpos] != ATYPE_DOUBLE)
901 0 : return false;
902 0 : argtypes[fmtpos] = ATYPE_DOUBLE;
903 0 : last_dollar = Max(last_dollar, fmtpos);
904 : }
905 : else
906 0 : return false; /* non-dollar conversion spec */
907 0 : break;
908 0 : case 'm':
909 : case '%':
910 0 : break;
911 0 : default:
912 0 : return false; /* bogus format string */
913 : }
914 :
915 : /*
916 : * If we finish the spec with afterstar still set, there's a
917 : * non-dollar star in there.
918 : */
919 0 : if (afterstar)
920 0 : return false; /* non-dollar conversion spec */
921 : }
922 :
923 : /*
924 : * Format appears valid so far, so collect the arguments in physical
925 : * order. (Since we rejected any non-dollar specs that would have
926 : * collected arguments, we know that dopr() hasn't collected any yet.)
927 : */
928 0 : for (i = 1; i <= last_dollar; i++)
929 : {
930 0 : switch (argtypes[i])
931 : {
932 0 : case ATYPE_NONE:
933 0 : return false;
934 0 : case ATYPE_INT:
935 0 : argvalues[i].i = va_arg(args, int);
936 0 : break;
937 0 : case ATYPE_LONG:
938 0 : argvalues[i].l = va_arg(args, long);
939 0 : break;
940 0 : case ATYPE_LONGLONG:
941 0 : argvalues[i].ll = va_arg(args, long long);
942 0 : break;
943 0 : case ATYPE_DOUBLE:
944 0 : argvalues[i].d = va_arg(args, double);
945 0 : break;
946 0 : case ATYPE_CHARPTR:
947 0 : argvalues[i].cptr = va_arg(args, char *);
948 0 : break;
949 : }
950 : }
951 :
952 0 : return true;
953 : }
954 :
955 : static void
956 1967230 : fmtstr(const char *value, int leftjust, int minlen, int maxwidth,
957 : int pointflag, PrintfTarget *target)
958 : {
959 : int padlen,
960 : vallen; /* amount to pad */
961 :
962 : /*
963 : * If a maxwidth (precision) is specified, we must not fetch more bytes
964 : * than that.
965 : */
966 1967230 : if (pointflag)
967 20774 : vallen = strnlen(value, maxwidth);
968 : else
969 1946456 : vallen = strlen(value);
970 :
971 1967230 : padlen = compute_padlen(minlen, vallen, leftjust);
972 :
973 1967230 : if (padlen > 0)
974 : {
975 591278 : dopr_outchmulti(' ', padlen, target);
976 591278 : padlen = 0;
977 : }
978 :
979 1967230 : dostr(value, vallen, target);
980 :
981 1967230 : trailing_pad(padlen, target);
982 1967230 : }
983 :
984 : static void
985 164 : fmtptr(const void *value, PrintfTarget *target)
986 : {
987 : int vallen;
988 : char convert[64];
989 :
990 : /* we rely on regular C library's snprintf to do the basic conversion */
991 164 : vallen = snprintf(convert, sizeof(convert), "%p", value);
992 164 : if (vallen < 0)
993 0 : target->failed = true;
994 : else
995 164 : dostr(convert, vallen, target);
996 164 : }
997 :
998 : static void
999 101019378 : fmtint(long long value, char type, int forcesign, int leftjust,
1000 : int minlen, int zpad, int precision, int pointflag,
1001 : PrintfTarget *target)
1002 : {
1003 : unsigned long long uvalue;
1004 : int base;
1005 : int dosign;
1006 101019378 : const char *cvt = "0123456789abcdef";
1007 101019378 : int signvalue = 0;
1008 : char convert[64];
1009 101019378 : int vallen = 0;
1010 : int padlen; /* amount to pad */
1011 : int zeropad; /* extra leading zeroes */
1012 :
1013 101019378 : switch (type)
1014 : {
1015 41390624 : case 'd':
1016 : case 'i':
1017 41390624 : base = 10;
1018 41390624 : dosign = 1;
1019 41390624 : break;
1020 11184 : case 'o':
1021 11184 : base = 8;
1022 11184 : dosign = 0;
1023 11184 : break;
1024 41365158 : case 'u':
1025 41365158 : base = 10;
1026 41365158 : dosign = 0;
1027 41365158 : break;
1028 69382 : case 'x':
1029 69382 : base = 16;
1030 69382 : dosign = 0;
1031 69382 : break;
1032 18183030 : case 'X':
1033 18183030 : cvt = "0123456789ABCDEF";
1034 18183030 : base = 16;
1035 18183030 : dosign = 0;
1036 18183030 : break;
1037 0 : default:
1038 0 : return; /* keep compiler quiet */
1039 : }
1040 :
1041 : /* disable MSVC warning about applying unary minus to an unsigned value */
1042 : #ifdef _MSC_VER
1043 : #pragma warning(push)
1044 : #pragma warning(disable: 4146)
1045 : #endif
1046 : /* Handle +/- */
1047 101019378 : if (dosign && adjust_sign((value < 0), forcesign, &signvalue))
1048 3510878 : uvalue = -(unsigned long long) value;
1049 : else
1050 97508498 : uvalue = (unsigned long long) value;
1051 : #ifdef _MSC_VER
1052 : #pragma warning(pop)
1053 : #endif
1054 :
1055 : /*
1056 : * SUS: the result of converting 0 with an explicit precision of 0 is no
1057 : * characters
1058 : */
1059 101019376 : if (value == 0 && pointflag && precision == 0)
1060 0 : vallen = 0;
1061 : else
1062 : {
1063 : /*
1064 : * Convert integer to string. We special-case each of the possible
1065 : * base values so as to avoid general-purpose divisions. On most
1066 : * machines, division by a fixed constant can be done much more
1067 : * cheaply than a general divide.
1068 : */
1069 101019376 : if (base == 10)
1070 : {
1071 : do
1072 : {
1073 219284406 : convert[sizeof(convert) - (++vallen)] = cvt[uvalue % 10];
1074 219284406 : uvalue = uvalue / 10;
1075 219284406 : } while (uvalue);
1076 : }
1077 18263596 : else if (base == 16)
1078 : {
1079 : do
1080 : {
1081 69064828 : convert[sizeof(convert) - (++vallen)] = cvt[uvalue % 16];
1082 69064828 : uvalue = uvalue / 16;
1083 69064828 : } while (uvalue);
1084 : }
1085 : else /* base == 8 */
1086 : {
1087 : do
1088 : {
1089 33552 : convert[sizeof(convert) - (++vallen)] = cvt[uvalue % 8];
1090 33552 : uvalue = uvalue / 8;
1091 33552 : } while (uvalue);
1092 : }
1093 : }
1094 :
1095 101019376 : zeropad = Max(0, precision - vallen);
1096 :
1097 101019376 : padlen = compute_padlen(minlen, vallen + zeropad, leftjust);
1098 :
1099 101019376 : leading_pad(zpad, signvalue, &padlen, target);
1100 :
1101 101019378 : if (zeropad > 0)
1102 0 : dopr_outchmulti('0', zeropad, target);
1103 :
1104 101019378 : dostr(convert + sizeof(convert) - vallen, vallen, target);
1105 :
1106 101019376 : trailing_pad(padlen, target);
1107 : }
1108 :
1109 : static void
1110 40554 : fmtchar(int value, int leftjust, int minlen, PrintfTarget *target)
1111 : {
1112 : int padlen; /* amount to pad */
1113 :
1114 40554 : padlen = compute_padlen(minlen, 1, leftjust);
1115 :
1116 40554 : if (padlen > 0)
1117 : {
1118 42 : dopr_outchmulti(' ', padlen, target);
1119 42 : padlen = 0;
1120 : }
1121 :
1122 40554 : dopr_outch(value, target);
1123 :
1124 40554 : trailing_pad(padlen, target);
1125 40554 : }
1126 :
1127 : static void
1128 1424234 : fmtfloat(double value, char type, int forcesign, int leftjust,
1129 : int minlen, int zpad, int precision, int pointflag,
1130 : PrintfTarget *target)
1131 : {
1132 1424234 : int signvalue = 0;
1133 : int prec;
1134 : int vallen;
1135 : char fmt[8];
1136 : char convert[1024];
1137 1424234 : int zeropadlen = 0; /* amount to pad with zeroes */
1138 : int padlen; /* amount to pad with spaces */
1139 :
1140 : /*
1141 : * We rely on the regular C library's snprintf to do the basic conversion,
1142 : * then handle padding considerations here.
1143 : *
1144 : * The dynamic range of "double" is about 1E+-308 for IEEE math, and not
1145 : * too wildly more than that with other hardware. In "f" format, snprintf
1146 : * could therefore generate at most 308 characters to the left of the
1147 : * decimal point; while we need to allow the precision to get as high as
1148 : * 308+17 to ensure that we don't truncate significant digits from very
1149 : * small values. To handle both these extremes, we use a buffer of 1024
1150 : * bytes and limit requested precision to 350 digits; this should prevent
1151 : * buffer overrun even with non-IEEE math. If the original precision
1152 : * request was more than 350, separately pad with zeroes.
1153 : *
1154 : * We handle infinities and NaNs specially to ensure platform-independent
1155 : * output.
1156 : */
1157 1424234 : if (precision < 0) /* cover possible overflow of "accum" */
1158 0 : precision = 0;
1159 1424234 : prec = Min(precision, 350);
1160 :
1161 1424234 : if (isnan(value))
1162 : {
1163 54 : strcpy(convert, "NaN");
1164 54 : vallen = 3;
1165 : /* no zero padding, regardless of precision spec */
1166 : }
1167 : else
1168 : {
1169 : /*
1170 : * Handle sign (NaNs have no sign, so we don't do this in the case
1171 : * above). "value < 0.0" will not be true for IEEE minus zero, so we
1172 : * detect that by looking for the case where value equals 0.0
1173 : * according to == but not according to memcmp.
1174 : */
1175 : static const double dzero = 0.0;
1176 :
1177 2834056 : if (adjust_sign((value < 0.0 ||
1178 1409876 : (value == 0.0 &&
1179 572508 : memcmp(&value, &dzero, sizeof(double)) != 0)),
1180 : forcesign, &signvalue))
1181 14304 : value = -value;
1182 :
1183 1424180 : if (isinf(value))
1184 : {
1185 114 : strcpy(convert, "Infinity");
1186 114 : vallen = 8;
1187 : /* no zero padding, regardless of precision spec */
1188 : }
1189 1424066 : else if (pointflag)
1190 : {
1191 971452 : zeropadlen = precision - prec;
1192 971452 : fmt[0] = '%';
1193 971452 : fmt[1] = '.';
1194 971452 : fmt[2] = '*';
1195 971452 : fmt[3] = type;
1196 971452 : fmt[4] = '\0';
1197 971452 : vallen = snprintf(convert, sizeof(convert), fmt, prec, value);
1198 : }
1199 : else
1200 : {
1201 452614 : fmt[0] = '%';
1202 452614 : fmt[1] = type;
1203 452614 : fmt[2] = '\0';
1204 452614 : vallen = snprintf(convert, sizeof(convert), fmt, value);
1205 : }
1206 1424180 : if (vallen < 0)
1207 0 : goto fail;
1208 : }
1209 :
1210 1424234 : padlen = compute_padlen(minlen, vallen + zeropadlen, leftjust);
1211 :
1212 1424234 : leading_pad(zpad, signvalue, &padlen, target);
1213 :
1214 1424234 : if (zeropadlen > 0)
1215 : {
1216 : /* If 'e' or 'E' format, inject zeroes before the exponent */
1217 0 : char *epos = strrchr(convert, 'e');
1218 :
1219 0 : if (!epos)
1220 0 : epos = strrchr(convert, 'E');
1221 0 : if (epos)
1222 : {
1223 : /* pad before exponent */
1224 0 : dostr(convert, epos - convert, target);
1225 0 : dopr_outchmulti('0', zeropadlen, target);
1226 0 : dostr(epos, vallen - (epos - convert), target);
1227 : }
1228 : else
1229 : {
1230 : /* no exponent, pad after the digits */
1231 0 : dostr(convert, vallen, target);
1232 0 : dopr_outchmulti('0', zeropadlen, target);
1233 : }
1234 : }
1235 : else
1236 : {
1237 : /* no zero padding, just emit the number as-is */
1238 1424234 : dostr(convert, vallen, target);
1239 : }
1240 :
1241 1424234 : trailing_pad(padlen, target);
1242 1424234 : return;
1243 :
1244 0 : fail:
1245 0 : target->failed = true;
1246 : }
1247 :
1248 : /*
1249 : * Nonstandard entry point to print a double value efficiently.
1250 : *
1251 : * This is approximately equivalent to strfromd(), but has an API more
1252 : * adapted to what float8out() wants. The behavior is like snprintf()
1253 : * with a format of "%.ng", where n is the specified precision.
1254 : * However, the target buffer must be nonempty (i.e. count > 0), and
1255 : * the precision is silently bounded to a sane range.
1256 : */
1257 : int
1258 230294 : pg_strfromd(char *str, size_t count, int precision, double value)
1259 : {
1260 : PrintfTarget target;
1261 230294 : int signvalue = 0;
1262 : int vallen;
1263 : char fmt[8];
1264 : char convert[64];
1265 :
1266 : /* Set up the target like pg_snprintf, but require nonempty buffer */
1267 : Assert(count > 0);
1268 230294 : target.bufstart = target.bufptr = str;
1269 230294 : target.bufend = str + count - 1;
1270 230294 : target.stream = NULL;
1271 230294 : target.nchars = 0;
1272 230294 : target.failed = false;
1273 :
1274 : /*
1275 : * We bound precision to a reasonable range; the combination of this and
1276 : * the knowledge that we're using "g" format without padding allows the
1277 : * convert[] buffer to be reasonably small.
1278 : */
1279 230294 : if (precision < 1)
1280 0 : precision = 1;
1281 230294 : else if (precision > 32)
1282 0 : precision = 32;
1283 :
1284 : /*
1285 : * The rest is just an inlined version of the fmtfloat() logic above,
1286 : * simplified using the knowledge that no padding is wanted.
1287 : */
1288 230294 : if (isnan(value))
1289 : {
1290 12138 : strcpy(convert, "NaN");
1291 12138 : vallen = 3;
1292 : }
1293 : else
1294 : {
1295 : static const double dzero = 0.0;
1296 :
1297 218156 : if (value < 0.0 ||
1298 185756 : (value == 0.0 &&
1299 26878 : memcmp(&value, &dzero, sizeof(double)) != 0))
1300 : {
1301 32466 : signvalue = '-';
1302 32466 : value = -value;
1303 : }
1304 :
1305 218156 : if (isinf(value))
1306 : {
1307 7116 : strcpy(convert, "Infinity");
1308 7116 : vallen = 8;
1309 : }
1310 : else
1311 : {
1312 211040 : fmt[0] = '%';
1313 211040 : fmt[1] = '.';
1314 211040 : fmt[2] = '*';
1315 211040 : fmt[3] = 'g';
1316 211040 : fmt[4] = '\0';
1317 211040 : vallen = snprintf(convert, sizeof(convert), fmt, precision, value);
1318 211040 : if (vallen < 0)
1319 : {
1320 0 : target.failed = true;
1321 0 : goto fail;
1322 : }
1323 : }
1324 : }
1325 :
1326 230294 : if (signvalue)
1327 32466 : dopr_outch(signvalue, &target);
1328 :
1329 230294 : dostr(convert, vallen, &target);
1330 :
1331 230294 : fail:
1332 230294 : *(target.bufptr) = '\0';
1333 460588 : return target.failed ? -1 : (target.bufptr - target.bufstart
1334 230294 : + target.nchars);
1335 : }
1336 :
1337 :
1338 : static void
1339 239337242 : dostr(const char *str, int slen, PrintfTarget *target)
1340 : {
1341 : /* fast path for common case of slen == 1 */
1342 239337242 : if (slen == 1)
1343 : {
1344 80138764 : dopr_outch(*str, target);
1345 80138764 : return;
1346 : }
1347 :
1348 315282378 : while (slen > 0)
1349 : {
1350 : int avail;
1351 :
1352 156771956 : if (target->bufend != NULL)
1353 134874186 : avail = target->bufend - target->bufptr;
1354 : else
1355 21897770 : avail = slen;
1356 156771956 : if (avail <= 0)
1357 : {
1358 : /* buffer full, can we dump to stream? */
1359 688546 : if (target->stream == NULL)
1360 : {
1361 688056 : target->nchars += slen; /* no, lose the data */
1362 688056 : return;
1363 : }
1364 490 : flushbuffer(target);
1365 490 : continue;
1366 : }
1367 156083410 : avail = Min(avail, slen);
1368 156083410 : memmove(target->bufptr, str, avail);
1369 156083410 : target->bufptr += avail;
1370 156083410 : str += avail;
1371 156083410 : slen -= avail;
1372 : }
1373 : }
1374 :
1375 : static void
1376 92441192 : dopr_outch(int c, PrintfTarget *target)
1377 : {
1378 92441192 : if (target->bufend != NULL && target->bufptr >= target->bufend)
1379 : {
1380 : /* buffer full, can we dump to stream? */
1381 200484 : if (target->stream == NULL)
1382 : {
1383 200484 : target->nchars++; /* no, lose the data */
1384 200484 : return;
1385 : }
1386 0 : flushbuffer(target);
1387 : }
1388 92240708 : *(target->bufptr++) = c;
1389 : }
1390 :
1391 : static void
1392 11381366 : dopr_outchmulti(int c, int slen, PrintfTarget *target)
1393 : {
1394 : /* fast path for common case of slen == 1 */
1395 11381366 : if (slen == 1)
1396 : {
1397 8203484 : dopr_outch(c, target);
1398 8203484 : return;
1399 : }
1400 :
1401 6355822 : while (slen > 0)
1402 : {
1403 : int avail;
1404 :
1405 3178104 : if (target->bufend != NULL)
1406 3132554 : avail = target->bufend - target->bufptr;
1407 : else
1408 45550 : avail = slen;
1409 3178104 : if (avail <= 0)
1410 : {
1411 : /* buffer full, can we dump to stream? */
1412 278 : if (target->stream == NULL)
1413 : {
1414 164 : target->nchars += slen; /* no, lose the data */
1415 164 : return;
1416 : }
1417 114 : flushbuffer(target);
1418 114 : continue;
1419 : }
1420 3177826 : avail = Min(avail, slen);
1421 3177826 : memset(target->bufptr, c, avail);
1422 3177826 : target->bufptr += avail;
1423 3177826 : slen -= avail;
1424 : }
1425 : }
1426 :
1427 :
1428 : static int
1429 42814802 : adjust_sign(int is_negative, int forcesign, int *signvalue)
1430 : {
1431 42814802 : if (is_negative)
1432 : {
1433 3525182 : *signvalue = '-';
1434 3525182 : return true;
1435 : }
1436 39289620 : else if (forcesign)
1437 204 : *signvalue = '+';
1438 39289620 : return false;
1439 : }
1440 :
1441 :
1442 : static int
1443 104451396 : compute_padlen(int minlen, int vallen, int leftjust)
1444 : {
1445 : int padlen;
1446 :
1447 104451396 : padlen = minlen - vallen;
1448 104451396 : if (padlen < 0)
1449 69700232 : padlen = 0;
1450 104451396 : if (leftjust)
1451 1107842 : padlen = -padlen;
1452 104451396 : return padlen;
1453 : }
1454 :
1455 :
1456 : static void
1457 102443610 : leading_pad(int zpad, int signvalue, int *padlen, PrintfTarget *target)
1458 : {
1459 : int maxpad;
1460 :
1461 102443610 : if (*padlen > 0 && zpad)
1462 : {
1463 8498538 : if (signvalue)
1464 : {
1465 224 : dopr_outch(signvalue, target);
1466 224 : --(*padlen);
1467 224 : signvalue = 0;
1468 : }
1469 8498538 : if (*padlen > 0)
1470 : {
1471 8498520 : dopr_outchmulti(zpad, *padlen, target);
1472 8498520 : *padlen = 0;
1473 : }
1474 : }
1475 102443610 : maxpad = (signvalue != 0);
1476 102443610 : if (*padlen > maxpad)
1477 : {
1478 1558560 : dopr_outchmulti(' ', *padlen - maxpad, target);
1479 1558560 : *padlen = maxpad;
1480 : }
1481 102443610 : if (signvalue)
1482 : {
1483 3525162 : dopr_outch(signvalue, target);
1484 3525162 : if (*padlen > 0)
1485 0 : --(*padlen);
1486 3525162 : else if (*padlen < 0)
1487 0 : ++(*padlen);
1488 : }
1489 102443610 : }
1490 :
1491 :
1492 : static void
1493 104451392 : trailing_pad(int padlen, PrintfTarget *target)
1494 : {
1495 104451392 : if (padlen < 0)
1496 732966 : dopr_outchmulti(' ', -padlen, target);
1497 104451392 : }
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