2 build a test version with
3 gcc -g -DDRIVER -I../.. -I../../include -o test-snprintf snprintf.c fmtu*long.o
7 Unix snprintf implementation.
8 derived from inetutils/libinetutils/snprintf.c Version 1.1
10 Copyright (C) 2001 Free Software Foundation, Inc.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General License for more details.
22 You should have received a copy of the GNU General License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 * added changes from Miles Bader
30 * corrected a bug with %f
31 * added support for %#g
32 * added more comments :-)
34 * supporting must ANSI syntaxic_sugars
38 THANKS(for the patches and ideas):
47 * Currently doesn't handle (and bash/readline doesn't use):
48 * * *M$ width, precision specifications
49 * * %N$ numbered argument conversions
50 * * inf, nan floating values imperfect (if isinf(), isnan() not in libc)
51 * * support for `F' is imperfect with ldfallback(), since underlying
52 * printf may not handle it -- should ideally have another autoconf test
55 #define FLOATING_POINT
61 #if defined(DRIVER) && !defined(HAVE_CONFIG_H)
62 #define HAVE_LONG_LONG
63 #define HAVE_LONG_DOUBLE
65 #define HAVE_PRINTF_A_FORMAT
67 #define HAVE_ISINF_IN_LIBC
69 #define HAVE_STRINGIZE
76 #if !defined (HAVE_SNPRINTF) || !defined (HAVE_ASPRINTF)
78 #include <bashtypes.h>
80 #if defined(PREFER_STDARG)
93 #include <chartypes.h>
100 # include <float.h> /* for manifest constants */
101 # include <stdio.h> /* for sprintf */
111 #include <shmbutil.h>
116 # define FL_PREFIX 0x01 /* add 0x, 0X, or 0 prefix as appropriate */
117 # define FL_ADDBASE 0x02 /* add base# prefix to converted value */
118 # define FL_HEXUPPER 0x04 /* use uppercase when converting to hex */
119 # define FL_UNSIGNED 0x08 /* don't add any sign */
120 extern char *fmtulong __P((unsigned long int, int, char *, size_t, int));
121 extern char *fmtullong __P((unsigned long long int, int, char *, size_t, int));
125 # define FREE(x) if (x) free (x)
128 /* Bound on length of the string representing an integer value of type T.
129 Subtract one for the sign bit if T is signed;
130 302 / 1000 is log10 (2) rounded up;
131 add one for integer division truncation;
132 add one more for a minus sign if t is signed. */
133 #define INT_STRLEN_BOUND(t) \
134 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
135 + 1 + TYPE_SIGNED (t))
137 /* conversion flags */
138 #define PF_ALTFORM 0x00001 /* # */
139 #define PF_HEXPREFIX 0x00002 /* 0[Xx] */
140 #define PF_LADJUST 0x00004 /* - */
141 #define PF_ZEROPAD 0x00008 /* 0 */
142 #define PF_PLUS 0x00010 /* + */
143 #define PF_SPACE 0x00020 /* ' ' */
144 #define PF_THOUSANDS 0x00040 /* ' */
146 #define PF_DOT 0x00080 /* `.precision' */
147 #define PF_STAR_P 0x00100 /* `*' after precision */
148 #define PF_STAR_W 0x00200 /* `*' before or without precision */
150 /* length modifiers */
151 #define PF_SIGNEDCHAR 0x00400 /* hh */
152 #define PF_SHORTINT 0x00800 /* h */
153 #define PF_LONGINT 0x01000 /* l */
154 #define PF_LONGLONG 0x02000 /* ll */
155 #define PF_LONGDBL 0x04000 /* L */
156 #define PF_INTMAX_T 0x08000 /* j */
157 #define PF_SIZE_T 0x10000 /* z */
158 #define PF_PTRDIFF_T 0x20000 /* t */
160 #define PF_ALLOCBUF 0x40000 /* for asprintf, vasprintf */
162 #define PFM_SN 0x01 /* snprintf, vsnprintf */
163 #define PFM_AS 0x02 /* asprintf, vasprintf */
165 #define ASBUFSIZE 128
167 #define x_digs "0123456789abcdef"
168 #define X_digs "0123456789ABCDEF"
170 static char intbuf[INT_STRLEN_BOUND(unsigned long) + 1];
174 static char *grouping;
177 * For the FLOATING POINT FORMAT :
178 * the challenge was finding a way to
179 * manipulate the Real numbers without having
180 * to resort to mathematical function(it
181 * would require to link with -lm) and not
182 * going down to the bit pattern(not portable)
184 * so a number, a real is:
186 real = integral + fraction
188 integral = ... + a(2)*10^2 + a(1)*10^1 + a(0)*10^0
189 fraction = b(1)*10^-1 + b(2)*10^-2 + ...
195 from then it was simple math
199 * size of the buffer for the integral part
200 * and the fraction part
202 #define MAX_INT 99 + 1 /* 1 for the null */
203 #define MAX_FRACT 307 + 1
206 * These functions use static buffers to store the results,
207 * and so are not reentrant
209 #define itoa(n) fmtulong(n, 10, intbuf, sizeof(intbuf), 0);
210 #define dtoa(n, p, f) numtoa(n, 10, p, f)
212 #define SWAP_INT(a,b) {int t; t = (a); (a) = (b); (b) = t;}
214 #define GETARG(type) (va_arg(args, type))
216 /* Macros that do proper sign extension and handle length modifiers. Used
217 for the integer conversion specifiers. */
218 #define GETSIGNED(p) \
219 (((p)->flags & PF_LONGINT) \
221 : (((p)->flags & PF_SHORTINT) ? (long)(short)GETARG (int) \
222 : (long)GETARG (int)))
224 #define GETUNSIGNED(p) \
225 (((p)->flags & PF_LONGINT) \
226 ? GETARG (unsigned long) \
227 : (((p)->flags & PF_SHORTINT) ? (unsigned long)(unsigned short)GETARG (int) \
228 : (unsigned long)GETARG (unsigned int)))
231 #ifdef HAVE_LONG_DOUBLE
232 #define GETLDOUBLE(p) GETARG (long double)
234 #define GETDOUBLE(p) GETARG (double)
236 #define SET_SIZE_FLAGS(p, type) \
237 if (sizeof (type) > sizeof (int)) \
238 (p)->flags |= PF_LONGINT; \
239 if (sizeof (type) > sizeof (long)) \
240 (p)->flags |= PF_LONGLONG;
242 /* this struct holds everything we need */
246 char *base; /* needed for [v]asprintf */
254 int width, precision;
258 /* the floating point stuff */
259 #ifdef FLOATING_POINT
260 static double pow_10 __P((int));
261 static int log_10 __P((double));
262 static double integral __P((double, double *));
263 static char *numtoa __P((double, int, int, char **));
266 static void init_data __P((struct DATA *, char *, size_t, const char *, int));
267 static void init_conv_flag __P((struct DATA *));
270 #ifdef FLOATING_POINT
271 static void floating __P((struct DATA *, double));
272 static void exponent __P((struct DATA *, double));
274 static void number __P((struct DATA *, unsigned long, int));
275 #ifdef HAVE_LONG_LONG
276 static void lnumber __P((struct DATA *, unsigned long long, int));
278 static void pointer __P((struct DATA *, unsigned long));
279 static void strings __P((struct DATA *, char *));
281 #ifdef FLOATING_POINT
282 # define FALLBACK_FMTSIZE 32
283 # define FALLBACK_BASE 4096
284 # define LFALLBACK_BASE 5120
285 # ifdef HAVE_LONG_DOUBLE
286 static void ldfallback __P((struct DATA *, const char *, const char *, long double));
288 static void dfallback __P((struct DATA *, const char *, const char *, double));
291 static char *groupnum __P((char *));
294 static void memory_error_and_abort ();
295 static void *xmalloc __P((size_t));
296 static void *xrealloc __P((void *, size_t));
297 static void xfree __P((void *));
299 # include <xmalloc.h>
302 /* those are defines specific to snprintf to hopefully
303 * make the code clearer :-)
311 /* round off to the precision */
312 #define ROUND(d, p) \
314 d - pow_10(-(p)->precision) * 0.5 : \
315 d + pow_10(-(p)->precision) * 0.5
317 /* set default precision */
318 #define DEF_PREC(p) \
319 if ((p)->precision == NOT_FOUND) \
322 /* put a char. increment the number of chars written even if we've exceeded
323 the vsnprintf/snprintf buffer size (for the return value) */
324 #define PUT_CHAR(c, p) \
327 if (((p)->flags & PF_ALLOCBUF) && ((p)->counter >= (p)->length - 1)) \
329 (p)->length += ASBUFSIZE; \
330 (p)->base = (char *)xrealloc((p)->base, (p)->length); \
331 (p)->holder = (p)->base + (p)->counter; /* in case reallocated */ \
333 if ((p)->counter < (p)->length) \
334 *(p)->holder++ = (c); \
339 /* Output a string. P->WIDTH has already been adjusted for padding. */
340 #define PUT_STRING(string, len, p) \
344 while ((len)-- > 0) \
346 PUT_CHAR (*(string), (p)); \
353 #define PUT_PLUS(d, p, zero) \
354 if ((d) > zero && (p)->justify == RIGHT) \
357 #define PUT_SPACE(d, p, zero) \
358 if (((p)->flags & PF_SPACE) && (d) > zero) \
362 #define PAD_RIGHT(p) \
363 if ((p)->width > 0 && (p)->justify != LEFT) \
364 for (; (p)->width > 0; (p)->width--) \
365 PUT_CHAR((p)->pad, p)
368 #define PAD_LEFT(p) \
369 if ((p)->width > 0 && (p)->justify == LEFT) \
370 for (; (p)->width > 0; (p)->width--) \
371 PUT_CHAR((p)->pad, p)
373 /* if width and prec. in the args */
374 #define STAR_ARGS(p) \
376 if ((p)->flags & PF_STAR_W) \
378 (p)->width = GETARG (int); \
379 if ((p)->width < 0) \
381 (p)->flags |= PF_LADJUST; \
382 (p)->justify = LEFT; \
383 (p)->width = -(p)->width; \
386 if ((p)->flags & PF_STAR_P) \
388 (p)->precision = GETARG (int); \
389 if ((p)->precision < 0) \
391 (p)->flags &= ~PF_STAR_P; \
392 (p)->precision = NOT_FOUND; \
397 #if defined (HAVE_LOCALE_H)
398 # define GETLOCALEDATA(d, t, g) \
403 (d) = '.'; (t) = -1; (g) = 0; /* defaults */ \
407 if (lv->decimal_point && lv->decimal_point[0]) \
408 (d) = lv->decimal_point[0]; \
409 if (lv->thousands_sep && lv->thousands_sep[0]) \
410 (t) = lv->thousands_sep[0]; \
411 (g) = lv->grouping ? lv->grouping : ""; \
412 if (*(g) == '\0' || *(g) == CHAR_MAX || (t) == -1) (g) = 0; \
418 # define GETLOCALEDATA(d, t, g) \
419 ( (d) = '.', (t) = ',', g = "\003" )
422 #ifdef FLOATING_POINT
424 * Find the nth power of 10
432 /* handle common cases with fast switch statement. */
435 case -3: return .001;
441 case 3: return 1000.;
447 for (n += 4; n < 0; n++)
453 for (n -= 4; n > 0; n--)
461 * Find the integral part of the log in base 10
462 * Note: this not a real log10()
463 I just need and approximation(integerpart) of x in:
499 * This function return the fraction part of a double
500 * and set in ip the integral part.
501 * In many ways it resemble the modf() found on most Un*x
510 double real_integral = 0.;
512 /* take care of the obvious */
513 /* equal to zero ? */
520 /* negative number ? */
531 /* the real work :-) */
532 for (j = log_10(real); j >= 0; j--)
535 s = (real - real_integral)/p;
539 real_integral += i*p;
542 return (real - real_integral);
545 #define PRECISION 1.e-6
547 * return an ascii representation of the integral part of the number
548 * and set fract to be an ascii representation of the fraction part
549 * the container for the fraction and the integral part or staticly
550 * declare with fix size
553 numtoa(number, base, precision, fract)
559 double ip, fp; /* integer and fraction part */
561 int digits = MAX_INT - 1;
562 static char integral_part[MAX_INT];
563 static char fraction_part[MAX_FRACT];
567 /* taking care of the obvious case: 0.0 */
570 integral_part[0] = '0';
571 integral_part[1] = '\0';
572 fraction_part[0] = '0';
573 fraction_part[1] = '\0';
575 *fract = fraction_part;
576 return integral_part;
579 /* for negative numbers */
580 if ((sign = number) < 0.)
583 digits--; /* sign consume one digit */
586 fraction = integral(number, &ip);
589 /* do the integral part */
592 integral_part[0] = '0';
597 for ( i = 0; i < digits && number != 0.; ++i)
600 fp = integral(number, &ip);
601 ch = (int)((fp + PRECISION)*base); /* force to round */
602 integral_part[i] = (ch <= 9) ? ch + '0' : ch + 'a' - 10;
603 if (! ISXDIGIT((unsigned char)integral_part[i]))
604 break; /* bail out overflow !! */
609 /* Oh No !! out of bound, ho well fill it up ! */
611 for (i = 0; i < digits; ++i)
612 integral_part[i] = '9';
616 integral_part[i++] = '-';
618 integral_part[i] = '\0';
620 /* reverse every thing */
621 for ( i--, j = 0; j < i; j++, i--)
622 SWAP_INT(integral_part[i], integral_part[j]);
624 /* the fractional part */
625 for (i=0, fp=fraction; precision > 0 && i < MAX_FRACT ; i++, precision--)
627 fraction_part[i] = (int)((fp + PRECISION)*10. + '0');
628 if (! DIGIT(fraction_part[i])) /* underflow ? */
630 fp = (fp*10.0) - (double)(long)((fp + PRECISION)*10.);
632 fraction_part[i] = '\0';
634 if (fract != (char **)0)
635 *fract = fraction_part;
637 return integral_part;
641 /* for %d and friends, it puts in holder
642 * the representation with the right padding
654 sd = d; /* signed for ' ' padding in base 10 */
655 flags = (*p->pf == 'u' || *p->pf == 'U') ? FL_UNSIGNED : 0;
657 flags |= FL_HEXUPPER;
659 tmp = fmtulong (d, base, intbuf, sizeof(intbuf), flags);
661 if ((p->flags & PF_THOUSANDS))
663 GETLOCALEDATA(decpoint, thoussep, grouping);
664 if (grouping && (t = groupnum (tmp)))
668 p->width -= strlen(tmp);
678 if (p->flags & PF_ALTFORM)
682 if (p->flags & PF_ALTFORM)
700 #ifdef HAVE_LONG_LONG
702 * identical to number() but works for `long long'
707 unsigned long long d;
714 sd = d; /* signed for ' ' padding in base 10 */
715 flags = (*p->pf == 'u' || *p->pf == 'U') ? FL_UNSIGNED : 0;
717 flags |= FL_HEXUPPER;
719 tmp = fmtullong (d, base, intbuf, sizeof(intbuf), flags);
721 if ((p->flags & PF_THOUSANDS))
723 GETLOCALEDATA(decpoint, thoussep, grouping);
724 if (grouping && (t = groupnum (tmp)))
728 p->width -= strlen(tmp);
738 if (p->flags & PF_ALTFORM)
742 if (p->flags & PF_ALTFORM)
768 tmp = fmtulong(d, 16, intbuf, sizeof(intbuf), 0);
769 p->width -= strlen(tmp);
772 /* prefix '0x' for pointers */
793 if (p->precision != NOT_FOUND) /* the smallest number */
794 len = (len < p->precision ? len : p->precision);
797 PUT_STRING (tmp, len, p);
801 /* %ls wide-character strings */
812 memset (&mbs, '\0', sizeof (mbstate_t));
813 ws = (const wchar_t *)tmp;
816 if (p->precision != NOT_FOUND)
818 os = (char *)xmalloc (p->precision + 1);
819 len = wcsrtombs (os, &ws, p->precision, &mbs);
823 len = wcsrtombs (NULL, &ws, 0, &mbs);
824 if (len != (size_t)-1)
826 memset (&mbs, '\0', sizeof (mbstate_t));
827 os = (char *)xmalloc (len + 1);
828 (void)wcsrtombs (os, &ws, len + 1, &mbs);
831 if (len == (size_t)-1)
833 /* invalid multibyte sequence; bail now. */
839 PUT_STRING (os, len, p);
852 lbuf = (char *)malloc (MB_CUR_MAX+1);
855 memset (&mbs, '\0', sizeof (mbstate_t));
856 len = wcrtomb (lbuf, wc, &mbs);
857 if (len == (size_t)-1)
858 /* conversion failed; bail now. */
862 PUT_STRING (l, len, p);
865 #endif /* HANDLE_MULTIBYTE */
867 #ifdef FLOATING_POINT
869 #ifndef HAVE_ISINF_IN_LIBC
870 /* Half-assed versions, since we don't want to link with libm. */
878 else if (d > DBL_MAX)
893 /* Check for [+-]infinity and NaN. If MODE == 1, we check for Infinity, else
894 (mode == 2) we check for NaN. This does the necessary printing. Returns
895 1 if Inf or Nan, 0 if not. */
897 chkinfnan(p, d, mode)
900 int mode; /* == 1 for inf, == 2 for nan */
906 i = (mode == 1) ? isinf(d) : isnan(d);
909 big = (mode == 1) ? "INF" : "NAN";
910 small = (mode == 1) ? "inf" : "nan";
912 tmp = (*p->pf == 'F' || *p->pf == 'G' || *p->pf == 'E') ? big : small;
926 /* %f %F %g %G floating point representation */
932 char *tmp, *tmp2, *t;
935 if (d != 0 && (chkinfnan(p, d, 1) || chkinfnan(p, d, 2)))
936 return; /* already printed nan or inf */
938 GETLOCALEDATA(decpoint, thoussep, grouping);
941 tmp = dtoa(d, p->precision, &tmp2);
943 if ((p->flags & PF_THOUSANDS) && grouping && (t = groupnum (tmp)))
946 /* calculate the padding. 1 for the dot */
947 p->width = p->width -
948 ((d > 0. && p->justify == RIGHT) ? 1:0) -
949 ((p->flags & PF_SPACE) ? 1:0) -
950 strlen(tmp) - p->precision - 1;
957 PUT_CHAR(*tmp, p); /* the integral */
962 if (p->precision != 0 || (p->flags & PF_ALTFORM))
963 PUT_CHAR(decpoint, p); /* put the '.' */
965 if ((*p->pf == 'g' || *p->pf == 'G') && (p->flags & PF_ALTFORM) == 0)
966 /* smash the trailing zeros unless altform */
967 for (i = strlen(tmp2) - 1; i >= 0 && tmp2[i] == '0'; i--)
970 for (; *tmp2; tmp2++)
971 PUT_CHAR(*tmp2, p); /* the fraction */
976 /* %e %E %g %G exponent representation */
985 if (chkinfnan(p, d, 1) || chkinfnan(p, d, 2))
986 return; /* already printed nan or inf */
988 GETLOCALEDATA(decpoint, thoussep, grouping);
991 d = d / pow_10(j); /* get the Mantissa */
993 tmp = dtoa(d, p->precision, &tmp2);
995 /* 1 for unit, 1 for the '.', 1 for 'e|E',
996 * 1 for '+|-', 2 for 'exp' */
997 /* calculate how much padding need */
998 p->width = p->width -
999 ((d > 0. && p->justify == RIGHT) ? 1:0) -
1000 ((p->flags & PF_SPACE) ? 1:0) - p->precision - 6;
1004 PUT_SPACE(d, p, 0.);
1012 if (p->precision != 0 || (p->flags & PF_ALTFORM))
1013 PUT_CHAR(decpoint, p); /* the '.' */
1015 if ((*p->pf == 'g' || *p->pf == 'G') && (p->flags & PF_ALTFORM) == 0)
1016 /* smash the trailing zeros unless altform */
1017 for (i = strlen(tmp2) - 1; i >= 0 && tmp2[i] == '0'; i--)
1020 for (; *tmp2; tmp2++)
1021 PUT_CHAR(*tmp2, p); /* the fraction */
1023 /* the exponent put the 'e|E' */
1024 if (*p->pf == 'g' || *p->pf == 'e')
1029 /* the sign of the exp */
1039 /* pad out to at least two spaces. pad with `0' if the exponent is a
1054 /* Return a new string with the digits in S grouped according to the locale's
1055 grouping info and thousands separator. If no grouping should be performed,
1056 this returns NULL; the caller needs to check for it. */
1061 char *se, *ret, *re, *g;
1064 if (grouping == 0 || *grouping <= 0 || *grouping == CHAR_MAX)
1065 return ((char *)NULL);
1067 /* find min grouping to size returned string */
1068 for (len = *grouping, g = grouping; *g; g++)
1069 if (*g > 0 && *g < len)
1073 len = slen / len + 1;
1074 ret = (char *)xmalloc (slen + len + 1);
1075 re = ret + slen + len;
1086 /* handle `-' inserted by numtoa() and the fmtu* family here. */
1087 if (se > s && se[-1] == '-')
1090 /* begin new group. */
1091 if (--len == 0 && se > s)
1094 len = *++g; /* was g++, but that uses first char twice (glibc bug, too) */
1096 len = *--g; /* use previous grouping */
1097 else if (*g == CHAR_MAX)
1109 memmove (ret, re, strlen (re) + 1);
1117 /* initialize the conversion specifiers */
1122 p->flags &= PF_ALLOCBUF; /* preserve PF_ALLOCBUF flag */
1123 p->precision = p->width = NOT_FOUND;
1124 p->justify = NOT_FOUND;
1129 init_data (p, string, length, format, mode)
1136 p->length = length - 1; /* leave room for '\0' */
1137 p->holder = p->base = string;
1140 p->flags = (mode == PFM_AS) ? PF_ALLOCBUF : 0;
1144 #if defined (__STDC__)
1145 vsnprintf_internal(struct DATA *data, char *string, size_t length, const char *format, va_list args)
1147 vsnprintf_internal(data, string, length, format, args)
1155 double d; /* temporary holder */
1156 #ifdef HAVE_LONG_DOUBLE
1157 long double ld; /* for later */
1160 #ifdef HAVE_LONG_LONG
1161 unsigned long long ull;
1165 #if HANDLE_MULTIBYTE
1169 const char *convstart;
1172 /* Sanity check, the string length must be >= 0. C99 actually says that
1173 LENGTH can be zero here, in the case of snprintf/vsnprintf (it's never
1174 0 in the case of asprintf/vasprintf), and the return value is the number
1175 of characters that would have been written. */
1182 /* Reset these for each call because the locale might have changed. */
1183 decpoint = thoussep = 0;
1187 for (; c = *(data->pf); data->pf++)
1195 convstart = data->pf;
1196 init_conv_flag (data); /* initialise format flags */
1199 for (state = 1; state && *data->pf; )
1202 /* fmtend = data->pf */
1203 #if defined (FLOATING_POINT) && defined (HAVE_LONG_DOUBLE)
1204 if (data->flags & PF_LONGDBL)
1211 # ifdef HAVE_PRINTF_A_FORMAT
1215 ld = GETLDOUBLE (data);
1216 ldfallback (data, convstart, data->pf, ld);
1220 #endif /* FLOATING_POINT && HAVE_LONG_DOUBLE */
1224 /* Parse format flags */
1225 case '\0': /* a NULL here ? ? bail out */
1226 *data->holder = '\0';
1227 return data->counter;
1230 data->flags |= PF_ALTFORM;
1233 data->flags |= PF_ZEROPAD;
1237 if (data->flags & PF_DOT)
1238 data->flags |= PF_STAR_P;
1240 data->flags |= PF_STAR_W;
1243 if ((data->flags & PF_DOT) == 0)
1245 data->flags |= PF_LADJUST;
1246 data->justify = LEFT;
1252 if ((data->flags & PF_PLUS) == 0)
1253 data->flags |= PF_SPACE;
1256 if ((data->flags & PF_DOT) == 0)
1258 data->flags |= PF_PLUS;
1259 data->justify = RIGHT;
1263 data->flags |= PF_THOUSANDS;
1266 case '1': case '2': case '3':
1267 case '4': case '5': case '6':
1268 case '7': case '8': case '9':
1272 n = n * 10 + TODIGIT(c);
1276 data->pf--; /* went too far */
1279 if (data->flags & PF_DOT)
1280 data->precision = negprec ? NOT_FOUND : n;
1285 /* optional precision */
1287 data->flags |= PF_DOT;
1288 data->precision = 0;
1291 /* length modifiers */
1293 data->flags |= (data->flags & PF_SHORTINT) ? PF_SIGNEDCHAR : PF_SHORTINT;
1296 data->flags |= (data->flags & PF_LONGINT) ? PF_LONGLONG : PF_LONGINT;
1299 data->flags |= PF_LONGDBL;
1302 data->flags |= PF_LONGLONG;
1305 data->flags |= PF_INTMAX_T;
1306 SET_SIZE_FLAGS(data, intmax_t);
1309 data->flags |= PF_SIZE_T;
1310 SET_SIZE_FLAGS(data, size_t);
1313 data->flags |= PF_PTRDIFF_T;
1314 SET_SIZE_FLAGS(data, ptrdiff_t);
1317 /* Conversion specifiers */
1318 #ifdef FLOATING_POINT
1319 case 'f': /* float, double */
1322 d = GETDOUBLE(data);
1331 d = GETDOUBLE(data);
1334 * for '%g|%G' ANSI: use f if exponent
1335 * is in the range or [-4,p] exclusively
1338 if (-4 < i && i < data->precision)
1340 /* reset precision */
1341 data->precision -= i + 1;
1346 /* reduce precision by 1 because of leading digit before
1347 decimal point in e format. */
1354 case 'E': /* Exponent double */
1356 d = GETDOUBLE(data);
1360 # ifdef HAVE_PRINTF_A_FORMAT
1364 d = GETDOUBLE(data);
1365 dfallback(data, convstart, data->pf, d);
1368 # endif /* HAVE_PRINTF_A_FORMAT */
1369 #endif /* FLOATING_POINT */
1371 data->flags |= PF_LONGINT;
1375 #ifdef HAVE_LONG_LONG
1376 if (data->flags & PF_LONGLONG)
1378 ull = GETARG (unsigned long long);
1379 lnumber(data, ull, 10);
1384 ul = GETUNSIGNED(data);
1385 number(data, ul, 10);
1390 data->flags |= PF_LONGINT;
1392 case 'd': /* decimal */
1395 #ifdef HAVE_LONG_LONG
1396 if (data->flags & PF_LONGLONG)
1398 ull = GETARG (long long);
1399 lnumber(data, ull, 10);
1404 ul = GETSIGNED(data);
1405 number(data, ul, 10);
1409 case 'o': /* octal */
1411 #ifdef HAVE_LONG_LONG
1412 if (data->flags & PF_LONGLONG)
1414 ull = GETARG (unsigned long long);
1415 lnumber(data, ull, 8);
1420 ul = GETUNSIGNED(data);
1421 number(data, ul, 8);
1426 case 'X': /* hexadecimal */
1428 #ifdef HAVE_LONG_LONG
1429 if (data->flags & PF_LONGLONG)
1431 ull = GETARG (unsigned long long);
1432 lnumber(data, ull, 16);
1437 ul = GETUNSIGNED(data);
1438 number(data, ul, 16);
1444 ul = (unsigned long)GETARG (void *);
1448 #if HANDLE_MULTIBYTE
1450 data->flags |= PF_LONGINT;
1453 case 'c': /* character */
1455 #if HANDLE_MULTIBYTE
1456 if (data->flags & PF_LONGINT)
1458 wc = GETARG (wint_t);
1469 #if HANDLE_MULTIBYTE
1471 data->flags |= PF_LONGINT;
1474 case 's': /* string */
1476 #if HANDLE_MULTIBYTE
1477 if (data->flags & PF_LONGINT)
1479 ws = GETARG (wchar_t *);
1480 wstrings (data, ws);
1485 s = GETARG (char *);
1491 #ifdef HAVE_LONG_LONG
1492 if (data->flags & PF_LONGLONG)
1493 *(GETARG (long long *)) = data->counter;
1496 if (data->flags & PF_LONGINT)
1497 *(GETARG (long *)) = data->counter;
1498 else if (data->flags & PF_SHORTINT)
1499 *(GETARG (short *)) = data->counter;
1501 *(GETARG (int *)) = data->counter;
1504 case '%': /* nothing just % */
1505 PUT_CHAR('%', data);
1509 /* is this an error ? maybe bail out */
1513 } /* end of `%' for loop */
1514 } /* end of format string for loop */
1516 if (data->length >= 0)
1517 *data->holder = '\0'; /* the end ye ! */
1519 return data->counter;
1522 #if defined (FLOATING_POINT) && defined (HAVE_LONG_DOUBLE)
1524 * Printing floating point numbers accurately is an art. I'm not good
1525 * at it. Fall back to sprintf for long double formats.
1528 ldfallback (data, fs, fe, ld)
1530 const char *fs, *fe;
1534 char fmtbuf[FALLBACK_FMTSIZE], *obuf;
1537 fl = LFALLBACK_BASE + (data->precision < 6 ? 6 : data->precision) + 2;
1538 obuf = (char *)xmalloc (fl);
1540 strncpy (fmtbuf, fs, fl);
1543 if ((data->flags & PF_STAR_W) && (data->flags & PF_STAR_P))
1544 sprintf (obuf, fmtbuf, data->width, data->precision, ld);
1545 else if (data->flags & PF_STAR_W)
1546 sprintf (obuf, fmtbuf, data->width, ld);
1547 else if (data->flags & PF_STAR_P)
1548 sprintf (obuf, fmtbuf, data->precision, ld);
1550 sprintf (obuf, fmtbuf, ld);
1552 for (x = obuf; *x; x++)
1553 PUT_CHAR (*x, data);
1556 #endif /* FLOATING_POINT && HAVE_LONG_DOUBLE */
1558 #ifdef FLOATING_POINT
1559 /* Used for %a, %A if the libc printf supports them. */
1561 dfallback (data, fs, fe, d)
1563 const char *fs, *fe;
1567 char fmtbuf[FALLBACK_FMTSIZE], obuf[FALLBACK_BASE];
1571 strncpy (fmtbuf, fs, fl);
1574 if ((data->flags & PF_STAR_W) && (data->flags & PF_STAR_P))
1575 sprintf (obuf, fmtbuf, data->width, data->precision, d);
1576 else if (data->flags & PF_STAR_W)
1577 sprintf (obuf, fmtbuf, data->width, d);
1578 else if (data->flags & PF_STAR_P)
1579 sprintf (obuf, fmtbuf, data->precision, d);
1581 sprintf (obuf, fmtbuf, d);
1583 for (x = obuf; *x; x++)
1584 PUT_CHAR (*x, data);
1586 #endif /* FLOATING_POINT */
1588 #ifndef HAVE_SNPRINTF
1591 #if defined (__STDC__)
1592 vsnprintf(char *string, size_t length, const char *format, va_list args)
1594 vsnprintf(string, length, format, args)
1603 if (string == 0 && length != 0)
1605 init_data (&data, string, length, format, PFM_SN);
1606 return (vsnprintf_internal(&data, string, length, format, args));
1610 #if defined(PREFER_STDARG)
1611 snprintf(char *string, size_t length, const char * format, ...)
1613 snprintf(string, length, format, va_alist)
1624 SH_VA_START(args, format);
1626 if (string == 0 && length != 0)
1628 init_data (&data, string, length, format, PFM_SN);
1629 rval = vsnprintf_internal (&data, string, length, format, args);
1636 #endif /* HAVE_SNPRINTF */
1638 #ifndef HAVE_ASPRINTF
1641 #if defined (__STDC__)
1642 vasprintf(char **stringp, const char *format, va_list args)
1644 vasprintf(stringp, format, args)
1654 string = (char *)xmalloc(ASBUFSIZE);
1655 init_data (&data, string, ASBUFSIZE, format, PFM_AS);
1656 r = vsnprintf_internal(&data, string, ASBUFSIZE, format, args);
1657 *stringp = data.base; /* not string in case reallocated */
1662 #if defined(PREFER_STDARG)
1663 asprintf(char **stringp, const char * format, ...)
1665 asprintf(stringp, format, va_alist)
1674 SH_VA_START(args, format);
1676 rval = vasprintf (stringp, format, args);
1690 memory_error_and_abort ()
1692 write (2, "out of virtual memory\n", 22);
1702 ret = malloc(bytes);
1704 memory_error_and_abort ();
1709 xrealloc (pointer, bytes)
1715 ret = pointer ? realloc(pointer, bytes) : malloc(bytes);
1717 memory_error_and_abort ();
1729 /* set of small tests for snprintf() */
1736 #ifdef HAVE_LOCALE_H
1737 setlocale(LC_ALL, "");
1741 si = snprintf((char *)NULL, 0, "abcde\n");
1742 printf("snprintf returns %d with NULL first argument and size of 0\n", si);
1743 si = snprintf(holder, 0, "abcde\n");
1744 printf("snprintf returns %d with non-NULL first argument and size of 0\n", si);
1745 si = snprintf((char *)NULL, 16, "abcde\n");
1746 printf("snprintf returns %d with NULL first argument and non-zero size\n", si);
1749 printf("Suite of test for snprintf:\n");
1750 printf("a_format\n");
1751 printf("printf() format\n");
1752 printf("snprintf() format\n\n");
1754 /* Checking the field widths */
1756 printf("/%%ld %%ld/, 336, 336\n");
1757 snprintf(holder, sizeof holder, "/%ld %ld/\n", 336, 336);
1758 asprintf(&h, "/%ld %ld/\n", 336, 336);
1759 printf("/%ld %ld/\n", 336, 336);
1760 printf("%s", holder);
1763 printf("/%%d/, 336\n");
1764 snprintf(holder, sizeof holder, "/%d/\n", 336);
1765 asprintf(&h, "/%d/\n", 336);
1766 printf("/%d/\n", 336);
1767 printf("%s", holder);
1770 printf("/%%2d/, 336\n");
1771 snprintf(holder, sizeof holder, "/%2d/\n", 336);
1772 asprintf(&h, "/%2d/\n", 336);
1773 printf("/%2d/\n", 336);
1774 printf("%s", holder);
1777 printf("/%%10d/, 336\n");
1778 snprintf(holder, sizeof holder, "/%10d/\n", 336);
1779 asprintf(&h, "/%10d/\n", 336);
1780 printf("/%10d/\n", 336);
1781 printf("%s", holder);
1784 printf("/%%-10d/, 336\n");
1785 snprintf(holder, sizeof holder, "/%-10d/\n", 336);
1786 asprintf(&h, "/%-10d/\n", 336);
1787 printf("/%-10d/\n", 336);
1788 printf("%s", holder);
1792 /* floating points */
1794 printf("/%%f/, 1234.56\n");
1795 snprintf(holder, sizeof holder, "/%f/\n", 1234.56);
1796 asprintf(&h, "/%f/\n", 1234.56);
1797 printf("/%f/\n", 1234.56);
1798 printf("%s", holder);
1801 printf("/%%e/, 1234.56\n");
1802 snprintf(holder, sizeof holder, "/%e/\n", 1234.56);
1803 asprintf(&h, "/%e/\n", 1234.56);
1804 printf("/%e/\n", 1234.56);
1805 printf("%s", holder);
1808 printf("/%%4.2f/, 1234.56\n");
1809 snprintf(holder, sizeof holder, "/%4.2f/\n", 1234.56);
1810 asprintf(&h, "/%4.2f/\n", 1234.56);
1811 printf("/%4.2f/\n", 1234.56);
1812 printf("%s", holder);
1815 printf("/%%3.1f/, 1234.56\n");
1816 snprintf(holder, sizeof holder, "/%3.1f/\n", 1234.56);
1817 asprintf(&h, "/%3.1f/\n", 1234.56);
1818 printf("/%3.1f/\n", 1234.56);
1819 printf("%s", holder);
1822 printf("/%%10.3f/, 1234.56\n");
1823 snprintf(holder, sizeof holder, "/%10.3f/\n", 1234.56);
1824 asprintf(&h, "/%10.3f/\n", 1234.56);
1825 printf("/%10.3f/\n", 1234.56);
1826 printf("%s", holder);
1829 printf("/%%10.3e/, 1234.56\n");
1830 snprintf(holder, sizeof holder, "/%10.3e/\n", 1234.56);
1831 asprintf(&h, "/%10.3e/\n", 1234.56);
1832 printf("/%10.3e/\n", 1234.56);
1833 printf("%s", holder);
1836 printf("/%%+4.2f/, 1234.56\n");
1837 snprintf(holder, sizeof holder, "/%+4.2f/\n", 1234.56);
1838 asprintf(&h, "/%+4.2f/\n", 1234.56);
1839 printf("/%+4.2f/\n", 1234.56);
1840 printf("%s", holder);
1843 printf("/%%010.2f/, 1234.56\n");
1844 snprintf(holder, sizeof holder, "/%010.2f/\n", 1234.56);
1845 asprintf(&h, "/%010.2f/\n", 1234.56);
1846 printf("/%010.2f/\n", 1234.56);
1847 printf("%s", holder);
1850 #define BLURB "Outstanding acting !"
1851 /* strings precisions */
1853 printf("/%%2s/, \"%s\"\n", BLURB);
1854 snprintf(holder, sizeof holder, "/%2s/\n", BLURB);
1855 asprintf(&h, "/%2s/\n", BLURB);
1856 printf("/%2s/\n", BLURB);
1857 printf("%s", holder);
1860 printf("/%%22s/ %s\n", BLURB);
1861 snprintf(holder, sizeof holder, "/%22s/\n", BLURB);
1862 asprintf(&h, "/%22s/\n", BLURB);
1863 printf("/%22s/\n", BLURB);
1864 printf("%s", holder);
1867 printf("/%%22.5s/ %s\n", BLURB);
1868 snprintf(holder, sizeof holder, "/%22.5s/\n", BLURB);
1869 asprintf(&h, "/%22.5s/\n", BLURB);
1870 printf("/%22.5s/\n", BLURB);
1871 printf("%s", holder);
1874 printf("/%%-22.5s/ %s\n", BLURB);
1875 snprintf(holder, sizeof holder, "/%-22.5s/\n", BLURB);
1876 asprintf(&h, "/%-22.5s/\n", BLURB);
1877 printf("/%-22.5s/\n", BLURB);
1878 printf("%s", holder);
1881 /* see some flags */
1883 printf("%%x %%X %%#x, 31, 31, 31\n");
1884 snprintf(holder, sizeof holder, "%x %X %#x\n", 31, 31, 31);
1885 asprintf(&h, "%x %X %#x\n", 31, 31, 31);
1886 printf("%x %X %#x\n", 31, 31, 31);
1887 printf("%s", holder);
1890 printf("**%%d**%% d**%% d**, 42, 42, -42\n");
1891 snprintf(holder, sizeof holder, "**%d**% d**% d**\n", 42, 42, -42);
1892 asprintf(&h, "**%d**% d**% d**\n", 42, 42, -42);
1893 printf("**%d**% d**% d**\n", 42, 42, -42);
1894 printf("%s", holder);
1899 printf("/%%g/, 31.4\n");
1900 snprintf(holder, sizeof holder, "/%g/\n", 31.4);
1901 asprintf(&h, "/%g/\n", 31.4);
1902 printf("/%g/\n", 31.4);
1903 printf("%s", holder);
1906 printf("/%%.6g/, 31.4\n");
1907 snprintf(holder, sizeof holder, "/%.6g/\n", 31.4);
1908 asprintf(&h, "/%.6g/\n", 31.4);
1909 printf("/%.6g/\n", 31.4);
1910 printf("%s", holder);
1913 printf("/%%.1G/, 31.4\n");
1914 snprintf(holder, sizeof holder, "/%.1G/\n", 31.4);
1915 asprintf(&h, "/%.1G/\n", 31.4);
1916 printf("/%.1G/\n", 31.4);
1917 printf("%s", holder);
1920 printf("/%%.1G/, 3100000000.4\n");
1921 snprintf(holder, sizeof holder, "/%.1G/\n", 3100000000.4);
1922 asprintf(&h, "/%.1G/\n", 3100000000.4);
1923 printf("/%.1G/\n", 3100000000.4);
1924 printf("%s", holder);
1928 printf("abc%n", &i); printf("%d\n", i);
1929 snprintf(holder, sizeof holder, "abc%n", &i);
1930 printf("%s", holder); printf("%d\n\n", i);
1931 asprintf(&h, "abc%n", &i);
1932 printf("%s", h); printf("%d\n\n", i);
1934 printf("%%*.*s --> 10.10\n");
1935 snprintf(holder, sizeof holder, "%*.*s\n", 10, 10, BLURB);
1936 asprintf(&h, "%*.*s\n", 10, 10, BLURB);
1937 printf("%*.*s\n", 10, 10, BLURB);
1938 printf("%s", holder);
1941 printf("%%%%%%%%\n");
1942 snprintf(holder, sizeof holder, "%%%%\n");
1943 asprintf(&h, "%%%%\n");
1945 printf("%s", holder);
1948 #define BIG "Hello this is a too big string for the buffer"
1949 /* printf("A buffer to small of 10, trying to put this:\n");*/
1950 printf("<%%>, %s\n", BIG);
1951 i = snprintf(holder, 10, "%s\n", BIG);
1952 i = asprintf(&h, "%s", BIG);
1953 printf("<%s>\n", BIG);
1954 printf("<%s>\n", holder);
1955 printf("<%s>\n\n", h);
1957 printf ("<%%p> vsnprintf\n");
1958 i = snprintf(holder, 100, "%p", vsnprintf);
1959 i = asprintf(&h, "%p", vsnprintf);
1960 printf("<%p>\n", vsnprintf);
1961 printf("<%s>\n", holder);
1962 printf("<%s>\n\n", h);
1964 printf ("<%%lu> LONG_MAX+1\n");
1965 i = snprintf(holder, 100, "%lu", (unsigned long)(LONG_MAX)+1);
1966 i = asprintf(&h, "%lu", (unsigned long)(LONG_MAX)+1);
1967 printf("<%lu>\n", (unsigned long)(LONG_MAX)+1);
1968 printf("<%s>\n", holder);
1969 printf("<%s>\n\n", h);
1971 #ifdef HAVE_LONG_LONG
1972 printf ("<%%llu> LLONG_MAX+1\n");
1973 i = snprintf(holder, 100, "%llu", (unsigned long long)(LLONG_MAX)+1);
1974 i = asprintf(&h, "%llu", (unsigned long long)(LLONG_MAX)+1);
1975 printf("<%llu>\n", (unsigned long long)(LLONG_MAX)+1);
1976 printf("<%s>\n", holder);
1977 printf("<%s>\n\n", h);
1980 #ifdef HAVE_LONG_DOUBLE
1981 printf ("<%%6.2LE> 42.42\n");
1982 i = snprintf(holder, 100, "%6.2LE", (long double)42.42);
1983 i = asprintf(&h, "%6.2LE", (long double)42.42);
1984 printf ("<%6.2LE>\n", (long double)42.42);
1985 printf ("<%s>\n", holder);
1986 printf ("<%s>\n\n", h);
1989 #ifdef HAVE_PRINTF_A_FORMAT
1990 printf ("<%%6.2A> 42.42\n");
1991 i = snprintf(holder, 100, "%6.2A", 42.42);
1992 i = asprintf(&h, "%6.2A", 42.42);
1993 printf ("<%6.2A>\n", 42.42);
1994 printf ("<%s>\n", holder);
1995 printf ("<%s>\n\n", h);
1997 printf ("<%%6.2LA> 42.42\n");
1998 i = snprintf(holder, 100, "%6.2LA", (long double)42.42);
1999 i = asprintf(&h, "%6.2LA", (long double)42.42);
2000 printf ("<%6.2LA>\n", (long double)42.42);
2001 printf ("<%s>\n", holder);
2002 printf ("<%s>\n\n", h);
2005 printf ("<%%.10240f> DBL_MAX\n");
2006 si = snprintf(holder, 100, "%.10240f", DBL_MAX);
2007 ai = asprintf(&h, "%.10240f", DBL_MAX);
2008 printf ("<%.10240f>\n", DBL_MAX);
2009 printf ("<%d> <%s>\n", si, holder);
2010 printf ("<%d> <%s>\n\n", ai, h);
2012 printf ("<%%.10240Lf> LDBL_MAX\n");
2013 si = snprintf(holder, 100, "%.10240Lf", (long double)LDBL_MAX);
2014 ai = asprintf(&h, "%.10240Lf", (long double)LDBL_MAX);
2015 printf ("<%.10240Lf>\n", (long double)LDBL_MAX);
2016 printf ("<%d> <%s>\n", si, holder);
2017 printf ("<%d> <%s>\n\n", ai, h);
2020 printf("/%%g/, 421.2345\n");
2021 snprintf(holder, sizeof holder, "/%g/\n", 421.2345);
2022 asprintf(&h, "/%g/\n", 421.2345);
2023 printf("/%g/\n", 421.2345);
2024 printf("%s", holder);
2027 printf("/%%g/, 4214.2345\n");
2028 snprintf(holder, sizeof holder, "/%g/\n", 4214.2345);
2029 asprintf(&h, "/%g/\n", 4214.2345);
2030 printf("/%g/\n", 4214.2345);
2031 printf("%s", holder);
2034 printf("/%%.5g/, 4214.2345\n");
2035 snprintf(holder, sizeof holder, "/%.5g/\n", 4214.2345);
2036 asprintf(&h, "/%.5g/\n", 4214.2345);
2037 printf("/%.5g/\n", 4214.2345);
2038 printf("%s", holder);
2041 printf("/%%.4g/, 4214.2345\n");
2042 snprintf(holder, sizeof holder, "/%.4g/\n", 4214.2345);
2043 asprintf(&h, "/%.4g/\n", 4214.2345);
2044 printf("/%.4g/\n", 4214.2345);
2045 printf("%s", holder);
2048 printf("/%%'ld %%'ld/, 12345, 1234567\n");
2049 snprintf(holder, sizeof holder, "/%'ld %'ld/\n", 12345, 1234567);
2050 asprintf(&h, "/%'ld %'ld/\n", 12345, 1234567);
2051 printf("/%'ld %'ld/\n", 12345, 1234567);
2052 printf("%s", holder);
2055 printf("/%%'ld %%'ld/, 336, 3336\n");
2056 snprintf(holder, sizeof holder, "/%'ld %'ld/\n", 336, 3336);
2057 asprintf(&h, "/%'ld %'ld/\n", 336, 3336);
2058 printf("/%'ld %'ld/\n", 336, 3336);
2059 printf("%s", holder);
2062 printf("/%%'ld %%'ld/, -42786, -142786\n");
2063 snprintf(holder, sizeof holder, "/%'ld %'ld/\n", -42786, -142786);
2064 asprintf(&h, "/%'ld %'ld/\n", -42786, -142786);
2065 printf("/%'ld %'ld/\n", -42786, -142786);
2066 printf("%s", holder);
2069 printf("/%%'f %%'f/, 421.2345, 421234.56789\n");
2070 snprintf(holder, sizeof holder, "/%'f %'f/\n", 421.2345, 421234.56789);
2071 asprintf(&h, "/%'f %'f/\n", 421.2345, 421234.56789);
2072 printf("/%'f %'f/\n", 421.2345, 421234.56789);
2073 printf("%s", holder);
2076 printf("/%%'f %%'f/, -421.2345, -421234.56789\n");
2077 snprintf(holder, sizeof holder, "/%'f %'f/\n", -421.2345, -421234.56789);
2078 asprintf(&h, "/%'f %'f/\n", -421.2345, -421234.56789);
2079 printf("/%'f %'f/\n", -421.2345, -421234.56789);
2080 printf("%s", holder);
2083 printf("/%%'g %%'g/, 421.2345, 421234.56789\n");
2084 snprintf(holder, sizeof holder, "/%'g %'g/\n", 421.2345, 421234.56789);
2085 asprintf(&h, "/%'g %'g/\n", 421.2345, 421234.56789);
2086 printf("/%'g %'g/\n", 421.2345, 421234.56789);
2087 printf("%s", holder);
2090 printf("/%%'g %%'g/, -421.2345, -421234.56789\n");
2091 snprintf(holder, sizeof holder, "/%'g %'g/\n", -421.2345, -421234.56789);
2092 asprintf(&h, "/%'g %'g/\n", -421.2345, -421234.56789);
2093 printf("/%'g %'g/\n", -421.2345, -421234.56789);
2094 printf("%s", holder);
2098 printf("/%%'g/, 4213455.8392\n");
2099 snprintf(holder, sizeof holder, "/%'g/\n", 4213455.8392);
2100 asprintf(&h, "/%'g/\n", 4213455.8392);
2101 printf("/%'g/\n", 4213455.8392);
2102 printf("%s", holder);