1 /*
2 * Copyright Patrick Powell 1995
3 * This code is based on code written by Patrick Powell (papowell@astart.com)
4 * It may be used for any purpose as long as this notice remains intact
5 * on all source code distributions
6 */
7
8 /**************************************************************
9 * Original:
10 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
11 * A bombproof version of doprnt (dopr) included.
12 * Sigh. This sort of thing is always nasty do deal with. Note that
13 * the version here does not include floating point...
14 *
15 * snprintf() is used instead of sprintf() as it does limit checks
16 * for string length. This covers a nasty loophole.
17 *
18 * The other functions are there to prevent NULL pointers from
19 * causing nast effects.
20 *
21 * More Recently:
22 * Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
23 * This was ugly. It is still ugly. I opted out of floating point
24 * numbers, but the formatter understands just about everything
25 * from the normal C string format, at least as far as I can tell from
26 * the Solaris 2.5 printf(3S) man page.
27 *
28 * Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
29 * Ok, added some minimal floating point support, which means this
30 * probably requires libm on most operating systems. Don't yet
31 * support the exponent (e,E) and sigfig (g,G). Also, fmtint()
32 * was pretty badly broken, it just wasn't being exercised in ways
33 * which showed it, so that's been fixed. Also, formated the code
34 * to mutt conventions, and removed dead code left over from the
35 * original. Also, there is now a builtin-test, just compile with:
36 * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
37 * and run snprintf for results.
38 *
39 * Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
40 * The PGP code was using unsigned hexadecimal formats.
41 * Unfortunately, unsigned formats simply didn't work.
42 *
43 * Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
44 * The original code assumed that both snprintf() and vsnprintf() were
45 * missing. Some systems only have snprintf() but not vsnprintf(), so
46 * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
47 *
48 * Andrew Tridgell (tridge@samba.org) Oct 1998
49 * fixed handling of %.0f
50 * added test for HAVE_LONG_DOUBLE
51 *
52 * tridge@samba.org, idra@samba.org, April 2001
53 * got rid of fcvt code (twas buggy and made testing harder)
54 * added C99 semantics
55 *
56 * date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0
57 * actually print args for %g and %e
58 *
59 * date: 2002/06/03 13:37:52; author: jmcd; state: Exp; lines: +8 -0
60 * Since includes.h isn't included here, VA_COPY has to be defined here. I don't
61 * see any include file that is guaranteed to be here, so I'm defining it
62 * locally. Fixes AIX and Solaris builds.
63 *
64 * date: 2002/06/03 03:07:24; author: tridge; state: Exp; lines: +5 -13
65 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of
66 * functions
67 *
68 * date: 2002/05/17 14:51:22; author: jmcd; state: Exp; lines: +21 -4
69 * Fix usage of va_list passed as an arg. Use __va_copy before using it
70 * when it exists.
71 *
72 * date: 2002/04/16 22:38:04; author: idra; state: Exp; lines: +20 -14
73 * Fix incorrect zpadlen handling in fmtfp.
74 * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
75 * few mods to make it easier to compile the tests.
76 * addedd the "Ollie" test to the floating point ones.
77 *
78 * Martin Pool (mbp@samba.org) April 2003
79 * Remove NO_CONFIG_H so that the test case can be built within a source
80 * tree with less trouble.
81 * Remove unnecessary SAFE_FREE() definition.
82 *
83 * Martin Pool (mbp@samba.org) May 2003
84 * Put in a prototype for dummy_snprintf() to quiet compiler warnings.
85 *
86 * Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
87 * if the C library has some snprintf functions already.
88 *
89 * Damien Miller (djm@mindrot.org) Jan 2007
90 * Fix integer overflows in return value.
91 * Make formatting quite a bit faster by inlining dopr_outch()
92 *
93 **************************************************************/
94
95 #include "includes.h"
96
97 #if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */
98 # undef HAVE_SNPRINTF
99 # undef HAVE_VSNPRINTF
100 #endif
101
102 #ifndef VA_COPY
103 # ifdef HAVE_VA_COPY
104 # define VA_COPY(dest, src) va_copy(dest, src)
105 # else
106 # ifdef HAVE___VA_COPY
107 # define VA_COPY(dest, src) __va_copy(dest, src)
108 # else
109 # define VA_COPY(dest, src) (dest) = (src)
110 # endif
111 # endif
112 #endif
113
114 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
115
116 #include <ctype.h>
117 #include <stdarg.h>
118 #include <stdlib.h>
119 #include <string.h>
120 #include <limits.h>
121 #include <errno.h>
122
123 #ifdef HAVE_LONG_DOUBLE
124 # define LDOUBLE long double
125 #else
126 # define LDOUBLE double
127 #endif
128
129 #ifdef HAVE_LONG_LONG
130 # define LLONG long long
131 #else
132 # define LLONG long
133 #endif
134
135 /*
136 * dopr(): poor man's version of doprintf
137 */
138
139 /* format read states */
140 #define DP_S_DEFAULT 0
141 #define DP_S_FLAGS 1
142 #define DP_S_MIN 2
143 #define DP_S_DOT 3
144 #define DP_S_MAX 4
145 #define DP_S_MOD 5
146 #define DP_S_CONV 6
147 #define DP_S_DONE 7
148
149 /* format flags - Bits */
150 #define DP_F_MINUS (1 << 0)
151 #define DP_F_PLUS (1 << 1)
152 #define DP_F_SPACE (1 << 2)
153 #define DP_F_NUM (1 << 3)
154 #define DP_F_ZERO (1 << 4)
155 #define DP_F_UP (1 << 5)
156 #define DP_F_UNSIGNED (1 << 6)
157
158 /* Conversion Flags */
159 #define DP_C_SHORT 1
160 #define DP_C_LONG 2
161 #define DP_C_LDOUBLE 3
162 #define DP_C_LLONG 4
163 #define DP_C_SIZE 5
164 #define DP_C_INTMAX 6
165
166 #define char_to_int(p) ((p)- '0')
167 #ifndef MAX
168 # define MAX(p,q) (((p) >= (q)) ? (p) : (q))
169 #endif
170
171 #define DOPR_OUTCH(buf, pos, buflen, thechar) \
172 do { \
173 if (pos + 1 >= INT_MAX) { \
174 errno = ERANGE; \
175 return -1; \
176 } \
177 if (pos < buflen) \
178 buf[pos] = thechar; \
179 (pos)++; \
180 } while (0)
181
182 static int dopr(char *buffer, size_t maxlen, const char *format,
183 va_list args_in);
184 static int fmtstr(char *buffer, size_t *currlen, size_t maxlen,
185 char *value, int flags, int min, int max);
186 static int fmtint(char *buffer, size_t *currlen, size_t maxlen,
187 intmax_t value, int base, int min, int max, int flags);
188 static int fmtfp(char *buffer, size_t *currlen, size_t maxlen,
189 LDOUBLE fvalue, int min, int max, int flags);
190
191 static int
dopr(char * buffer,size_t maxlen,const char * format,va_list args_in)192 dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
193 {
194 char ch;
195 intmax_t value;
196 LDOUBLE fvalue;
197 char *strvalue;
198 int min;
199 int max;
200 int state;
201 int flags;
202 int cflags;
203 size_t currlen;
204 va_list args;
205
206 VA_COPY(args, args_in);
207
208 state = DP_S_DEFAULT;
209 currlen = flags = cflags = min = 0;
210 max = -1;
211 ch = *format++;
212
213 while (state != DP_S_DONE) {
214 if (ch == '\0')
215 state = DP_S_DONE;
216
217 switch(state) {
218 case DP_S_DEFAULT:
219 if (ch == '%')
220 state = DP_S_FLAGS;
221 else
222 DOPR_OUTCH(buffer, currlen, maxlen, ch);
223 ch = *format++;
224 break;
225 case DP_S_FLAGS:
226 switch (ch) {
227 case '-':
228 flags |= DP_F_MINUS;
229 ch = *format++;
230 break;
231 case '+':
232 flags |= DP_F_PLUS;
233 ch = *format++;
234 break;
235 case ' ':
236 flags |= DP_F_SPACE;
237 ch = *format++;
238 break;
239 case '#':
240 flags |= DP_F_NUM;
241 ch = *format++;
242 break;
243 case '0':
244 flags |= DP_F_ZERO;
245 ch = *format++;
246 break;
247 default:
248 state = DP_S_MIN;
249 break;
250 }
251 break;
252 case DP_S_MIN:
253 if (isdigit((unsigned char)ch)) {
254 min = 10*min + char_to_int (ch);
255 ch = *format++;
256 } else if (ch == '*') {
257 min = va_arg (args, int);
258 ch = *format++;
259 state = DP_S_DOT;
260 } else {
261 state = DP_S_DOT;
262 }
263 break;
264 case DP_S_DOT:
265 if (ch == '.') {
266 state = DP_S_MAX;
267 ch = *format++;
268 } else {
269 state = DP_S_MOD;
270 }
271 break;
272 case DP_S_MAX:
273 if (isdigit((unsigned char)ch)) {
274 if (max < 0)
275 max = 0;
276 max = 10*max + char_to_int (ch);
277 ch = *format++;
278 } else if (ch == '*') {
279 max = va_arg (args, int);
280 ch = *format++;
281 state = DP_S_MOD;
282 } else {
283 state = DP_S_MOD;
284 }
285 break;
286 case DP_S_MOD:
287 switch (ch) {
288 case 'h':
289 cflags = DP_C_SHORT;
290 ch = *format++;
291 break;
292 case 'j':
293 cflags = DP_C_INTMAX;
294 ch = *format++;
295 break;
296 case 'l':
297 cflags = DP_C_LONG;
298 ch = *format++;
299 if (ch == 'l') { /* It's a long long */
300 cflags = DP_C_LLONG;
301 ch = *format++;
302 }
303 break;
304 case 'L':
305 cflags = DP_C_LDOUBLE;
306 ch = *format++;
307 break;
308 case 'z':
309 cflags = DP_C_SIZE;
310 ch = *format++;
311 break;
312 default:
313 break;
314 }
315 state = DP_S_CONV;
316 break;
317 case DP_S_CONV:
318 switch (ch) {
319 case 'd':
320 case 'i':
321 if (cflags == DP_C_SHORT)
322 value = va_arg (args, int);
323 else if (cflags == DP_C_LONG)
324 value = va_arg (args, long int);
325 else if (cflags == DP_C_LLONG)
326 value = va_arg (args, LLONG);
327 else if (cflags == DP_C_SIZE)
328 value = va_arg (args, ssize_t);
329 else if (cflags == DP_C_INTMAX)
330 value = va_arg (args, intmax_t);
331 else
332 value = va_arg (args, int);
333 if (fmtint(buffer, &currlen, maxlen,
334 value, 10, min, max, flags) == -1)
335 return -1;
336 break;
337 case 'o':
338 flags |= DP_F_UNSIGNED;
339 if (cflags == DP_C_SHORT)
340 value = va_arg (args, unsigned int);
341 else if (cflags == DP_C_LONG)
342 value = (long)va_arg (args, unsigned long int);
343 else if (cflags == DP_C_LLONG)
344 value = (long)va_arg (args, unsigned LLONG);
345 else if (cflags == DP_C_SIZE)
346 value = va_arg (args, size_t);
347 #ifdef notyet
348 else if (cflags == DP_C_INTMAX)
349 value = va_arg (args, uintmax_t);
350 #endif
351 else
352 value = (long)va_arg (args, unsigned int);
353 if (fmtint(buffer, &currlen, maxlen, value,
354 8, min, max, flags) == -1)
355 return -1;
356 break;
357 case 'u':
358 flags |= DP_F_UNSIGNED;
359 if (cflags == DP_C_SHORT)
360 value = va_arg (args, unsigned int);
361 else if (cflags == DP_C_LONG)
362 value = (long)va_arg (args, unsigned long int);
363 else if (cflags == DP_C_LLONG)
364 value = (LLONG)va_arg (args, unsigned LLONG);
365 else if (cflags == DP_C_SIZE)
366 value = va_arg (args, size_t);
367 #ifdef notyet
368 else if (cflags == DP_C_INTMAX)
369 value = va_arg (args, uintmax_t);
370 #endif
371 else
372 value = (long)va_arg (args, unsigned int);
373 if (fmtint(buffer, &currlen, maxlen, value,
374 10, min, max, flags) == -1)
375 return -1;
376 break;
377 case 'X':
378 flags |= DP_F_UP;
379 case 'x':
380 flags |= DP_F_UNSIGNED;
381 if (cflags == DP_C_SHORT)
382 value = va_arg (args, unsigned int);
383 else if (cflags == DP_C_LONG)
384 value = (long)va_arg (args, unsigned long int);
385 else if (cflags == DP_C_LLONG)
386 value = (LLONG)va_arg (args, unsigned LLONG);
387 else if (cflags == DP_C_SIZE)
388 value = va_arg (args, size_t);
389 #ifdef notyet
390 else if (cflags == DP_C_INTMAX)
391 value = va_arg (args, uintmax_t);
392 #endif
393 else
394 value = (long)va_arg (args, unsigned int);
395 if (fmtint(buffer, &currlen, maxlen, value,
396 16, min, max, flags) == -1)
397 return -1;
398 break;
399 case 'f':
400 if (cflags == DP_C_LDOUBLE)
401 fvalue = va_arg (args, LDOUBLE);
402 else
403 fvalue = va_arg (args, double);
404 if (fmtfp(buffer, &currlen, maxlen, fvalue,
405 min, max, flags) == -1)
406 return -1;
407 break;
408 case 'E':
409 flags |= DP_F_UP;
410 case 'e':
411 if (cflags == DP_C_LDOUBLE)
412 fvalue = va_arg (args, LDOUBLE);
413 else
414 fvalue = va_arg (args, double);
415 if (fmtfp(buffer, &currlen, maxlen, fvalue,
416 min, max, flags) == -1)
417 return -1;
418 break;
419 case 'G':
420 flags |= DP_F_UP;
421 case 'g':
422 if (cflags == DP_C_LDOUBLE)
423 fvalue = va_arg (args, LDOUBLE);
424 else
425 fvalue = va_arg (args, double);
426 if (fmtfp(buffer, &currlen, maxlen, fvalue,
427 min, max, flags) == -1)
428 return -1;
429 break;
430 case 'c':
431 DOPR_OUTCH(buffer, currlen, maxlen,
432 va_arg (args, int));
433 break;
434 case 's':
435 strvalue = va_arg (args, char *);
436 if (!strvalue) strvalue = "(NULL)";
437 if (max == -1) {
438 max = strlen(strvalue);
439 }
440 if (min > 0 && max >= 0 && min > max) max = min;
441 if (fmtstr(buffer, &currlen, maxlen,
442 strvalue, flags, min, max) == -1)
443 return -1;
444 break;
445 case 'p':
446 strvalue = va_arg (args, void *);
447 if (fmtint(buffer, &currlen, maxlen,
448 (long) strvalue, 16, min, max, flags) == -1)
449 return -1;
450 break;
451 #if we_dont_want_this_in_openssh
452 case 'n':
453 if (cflags == DP_C_SHORT) {
454 short int *num;
455 num = va_arg (args, short int *);
456 *num = currlen;
457 } else if (cflags == DP_C_LONG) {
458 long int *num;
459 num = va_arg (args, long int *);
460 *num = (long int)currlen;
461 } else if (cflags == DP_C_LLONG) {
462 LLONG *num;
463 num = va_arg (args, LLONG *);
464 *num = (LLONG)currlen;
465 } else if (cflags == DP_C_SIZE) {
466 ssize_t *num;
467 num = va_arg (args, ssize_t *);
468 *num = (ssize_t)currlen;
469 } else if (cflags == DP_C_INTMAX) {
470 intmax_t *num;
471 num = va_arg (args, intmax_t *);
472 *num = (intmax_t)currlen;
473 } else {
474 int *num;
475 num = va_arg (args, int *);
476 *num = currlen;
477 }
478 break;
479 #endif
480 case '%':
481 DOPR_OUTCH(buffer, currlen, maxlen, ch);
482 break;
483 case 'w':
484 /* not supported yet, treat as next char */
485 ch = *format++;
486 break;
487 default:
488 /* Unknown, skip */
489 break;
490 }
491 ch = *format++;
492 state = DP_S_DEFAULT;
493 flags = cflags = min = 0;
494 max = -1;
495 break;
496 case DP_S_DONE:
497 break;
498 default:
499 /* hmm? */
500 break; /* some picky compilers need this */
501 }
502 }
503 if (maxlen != 0) {
504 if (currlen < maxlen - 1)
505 buffer[currlen] = '\0';
506 else if (maxlen > 0)
507 buffer[maxlen - 1] = '\0';
508 }
509
510 return currlen < INT_MAX ? (int)currlen : -1;
511 }
512
513 static int
fmtstr(char * buffer,size_t * currlen,size_t maxlen,char * value,int flags,int min,int max)514 fmtstr(char *buffer, size_t *currlen, size_t maxlen,
515 char *value, int flags, int min, int max)
516 {
517 int padlen, strln; /* amount to pad */
518 int cnt = 0;
519
520 #ifdef DEBUG_SNPRINTF
521 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
522 #endif
523 if (value == 0) {
524 value = "<NULL>";
525 }
526
527 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
528 padlen = min - strln;
529 if (padlen < 0)
530 padlen = 0;
531 if (flags & DP_F_MINUS)
532 padlen = -padlen; /* Left Justify */
533
534 while ((padlen > 0) && (cnt < max)) {
535 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
536 --padlen;
537 ++cnt;
538 }
539 while (*value && (cnt < max)) {
540 DOPR_OUTCH(buffer, *currlen, maxlen, *value);
541 value++;
542 ++cnt;
543 }
544 while ((padlen < 0) && (cnt < max)) {
545 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
546 ++padlen;
547 ++cnt;
548 }
549 return 0;
550 }
551
552 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
553
554 static int
fmtint(char * buffer,size_t * currlen,size_t maxlen,intmax_t value,int base,int min,int max,int flags)555 fmtint(char *buffer, size_t *currlen, size_t maxlen,
556 intmax_t value, int base, int min, int max, int flags)
557 {
558 int signvalue = 0;
559 unsigned LLONG uvalue;
560 char convert[20];
561 int place = 0;
562 int spadlen = 0; /* amount to space pad */
563 int zpadlen = 0; /* amount to zero pad */
564 int caps = 0;
565
566 if (max < 0)
567 max = 0;
568
569 uvalue = value;
570
571 if(!(flags & DP_F_UNSIGNED)) {
572 if( value < 0 ) {
573 signvalue = '-';
574 uvalue = -value;
575 } else {
576 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
577 signvalue = '+';
578 else if (flags & DP_F_SPACE)
579 signvalue = ' ';
580 }
581 }
582
583 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
584
585 do {
586 convert[place++] =
587 (caps? "0123456789ABCDEF":"0123456789abcdef")
588 [uvalue % (unsigned)base ];
589 uvalue = (uvalue / (unsigned)base );
590 } while(uvalue && (place < 20));
591 if (place == 20) place--;
592 convert[place] = 0;
593
594 zpadlen = max - place;
595 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
596 if (zpadlen < 0) zpadlen = 0;
597 if (spadlen < 0) spadlen = 0;
598 if (flags & DP_F_ZERO) {
599 zpadlen = MAX(zpadlen, spadlen);
600 spadlen = 0;
601 }
602 if (flags & DP_F_MINUS)
603 spadlen = -spadlen; /* Left Justifty */
604
605 #ifdef DEBUG_SNPRINTF
606 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
607 zpadlen, spadlen, min, max, place);
608 #endif
609
610 /* Spaces */
611 while (spadlen > 0) {
612 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
613 --spadlen;
614 }
615
616 /* Sign */
617 if (signvalue)
618 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
619
620 /* Zeros */
621 if (zpadlen > 0) {
622 while (zpadlen > 0) {
623 DOPR_OUTCH(buffer, *currlen, maxlen, '0');
624 --zpadlen;
625 }
626 }
627
628 /* Digits */
629 while (place > 0) {
630 --place;
631 DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]);
632 }
633
634 /* Left Justified spaces */
635 while (spadlen < 0) {
636 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
637 ++spadlen;
638 }
639 return 0;
640 }
641
abs_val(LDOUBLE value)642 static LDOUBLE abs_val(LDOUBLE value)
643 {
644 LDOUBLE result = value;
645
646 if (value < 0)
647 result = -value;
648
649 return result;
650 }
651
POW10(int val)652 static LDOUBLE POW10(int val)
653 {
654 LDOUBLE result = 1;
655
656 while (val) {
657 result *= 10;
658 val--;
659 }
660
661 return result;
662 }
663
ROUND(LDOUBLE value)664 static LLONG ROUND(LDOUBLE value)
665 {
666 LLONG intpart;
667
668 intpart = (LLONG)value;
669 value = value - intpart;
670 if (value >= 0.5) intpart++;
671
672 return intpart;
673 }
674
675 /* a replacement for modf that doesn't need the math library. Should
676 be portable, but slow */
my_modf(double x0,double * iptr)677 static double my_modf(double x0, double *iptr)
678 {
679 int i;
680 long l;
681 double x = x0;
682 double f = 1.0;
683
684 for (i=0;i<100;i++) {
685 l = (long)x;
686 if (l <= (x+1) && l >= (x-1)) break;
687 x *= 0.1;
688 f *= 10.0;
689 }
690
691 if (i == 100) {
692 /*
693 * yikes! the number is beyond what we can handle.
694 * What do we do?
695 */
696 (*iptr) = 0;
697 return 0;
698 }
699
700 if (i != 0) {
701 double i2;
702 double ret;
703
704 ret = my_modf(x0-l*f, &i2);
705 (*iptr) = l*f + i2;
706 return ret;
707 }
708
709 (*iptr) = l;
710 return x - (*iptr);
711 }
712
713
714 static int
fmtfp(char * buffer,size_t * currlen,size_t maxlen,LDOUBLE fvalue,int min,int max,int flags)715 fmtfp (char *buffer, size_t *currlen, size_t maxlen,
716 LDOUBLE fvalue, int min, int max, int flags)
717 {
718 int signvalue = 0;
719 double ufvalue;
720 char iconvert[311];
721 char fconvert[311];
722 int iplace = 0;
723 int fplace = 0;
724 int padlen = 0; /* amount to pad */
725 int zpadlen = 0;
726 int caps = 0;
727 int idx;
728 double intpart;
729 double fracpart;
730 double temp;
731
732 /*
733 * AIX manpage says the default is 0, but Solaris says the default
734 * is 6, and sprintf on AIX defaults to 6
735 */
736 if (max < 0)
737 max = 6;
738
739 ufvalue = abs_val (fvalue);
740
741 if (fvalue < 0) {
742 signvalue = '-';
743 } else {
744 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
745 signvalue = '+';
746 } else {
747 if (flags & DP_F_SPACE)
748 signvalue = ' ';
749 }
750 }
751
752 #if 0
753 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
754 #endif
755
756 #if 0
757 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
758 #endif
759
760 /*
761 * Sorry, we only support 16 digits past the decimal because of our
762 * conversion method
763 */
764 if (max > 16)
765 max = 16;
766
767 /* We "cheat" by converting the fractional part to integer by
768 * multiplying by a factor of 10
769 */
770
771 temp = ufvalue;
772 my_modf(temp, &intpart);
773
774 fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
775
776 if (fracpart >= POW10(max)) {
777 intpart++;
778 fracpart -= POW10(max);
779 }
780
781 /* Convert integer part */
782 do {
783 temp = intpart*0.1;
784 my_modf(temp, &intpart);
785 idx = (int) ((temp -intpart +0.05)* 10.0);
786 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
787 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
788 iconvert[iplace++] =
789 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
790 } while (intpart && (iplace < 311));
791 if (iplace == 311) iplace--;
792 iconvert[iplace] = 0;
793
794 /* Convert fractional part */
795 if (fracpart)
796 {
797 do {
798 temp = fracpart*0.1;
799 my_modf(temp, &fracpart);
800 idx = (int) ((temp -fracpart +0.05)* 10.0);
801 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
802 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
803 fconvert[fplace++] =
804 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
805 } while(fracpart && (fplace < 311));
806 if (fplace == 311) fplace--;
807 }
808 fconvert[fplace] = 0;
809
810 /* -1 for decimal point, another -1 if we are printing a sign */
811 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
812 zpadlen = max - fplace;
813 if (zpadlen < 0) zpadlen = 0;
814 if (padlen < 0)
815 padlen = 0;
816 if (flags & DP_F_MINUS)
817 padlen = -padlen; /* Left Justifty */
818
819 if ((flags & DP_F_ZERO) && (padlen > 0)) {
820 if (signvalue) {
821 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
822 --padlen;
823 signvalue = 0;
824 }
825 while (padlen > 0) {
826 DOPR_OUTCH(buffer, *currlen, maxlen, '0');
827 --padlen;
828 }
829 }
830 while (padlen > 0) {
831 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
832 --padlen;
833 }
834 if (signvalue)
835 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
836
837 while (iplace > 0) {
838 --iplace;
839 DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]);
840 }
841
842 #ifdef DEBUG_SNPRINTF
843 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
844 #endif
845
846 /*
847 * Decimal point. This should probably use locale to find the correct
848 * char to print out.
849 */
850 if (max > 0) {
851 DOPR_OUTCH(buffer, *currlen, maxlen, '.');
852
853 while (zpadlen > 0) {
854 DOPR_OUTCH(buffer, *currlen, maxlen, '0');
855 --zpadlen;
856 }
857
858 while (fplace > 0) {
859 --fplace;
860 DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]);
861 }
862 }
863
864 while (padlen < 0) {
865 DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
866 ++padlen;
867 }
868 return 0;
869 }
870 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
871
872 #if !defined(HAVE_VSNPRINTF)
873 int
vsnprintf(char * str,size_t count,const char * fmt,va_list args)874 vsnprintf (char *str, size_t count, const char *fmt, va_list args)
875 {
876 return dopr(str, count, fmt, args);
877 }
878 #endif
879
880 #if !defined(HAVE_SNPRINTF)
881 int
snprintf(char * str,size_t count,SNPRINTF_CONST char * fmt,...)882 snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...)
883 {
884 size_t ret;
885 va_list ap;
886
887 va_start(ap, fmt);
888 ret = vsnprintf(str, count, fmt, ap);
889 va_end(ap);
890 return ret;
891 }
892 #endif
893