1#include <config.h>
| 1/* snprintf - compatibility implementation of snprintf, vsnprintf
2 *
3 * Copyright (c) 2013, NLnet Labs. All rights reserved.
4 *
5 * This software is open source.
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 *
11 * Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 *
18 * Neither the name of the NLNET LABS nor the names of its contributors may
19 * be used to endorse or promote products derived from this software without
20 * specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
|
2
| 34
|
3#ifndef HAVE_SNPRINTF
4
| 35#include "config.h"
36#include <stdio.h>
|
5#include <ctype.h>
| 37#include <ctype.h>
|
6#include <sys/types.h>
| 38#include <string.h>
39#include <stdarg.h>
40#include <stdlib.h>
41#include <errno.h>
42#ifdef HAVE_STDINT_H
43#include <stdint.h>
44#endif
|
7
| 45
|
8/* Define this as a fall through, HAVE_STDARG_H is probably already set */
| 46/* for test */
47/* #define SNPRINTF_TEST 1 */
48#ifdef SNPRINTF_TEST
49#define snprintf my_snprintf
50#define vsnprintf my_vsnprintf
51#endif /* SNPRINTF_TEST */
|
9
| 52
|
10#define HAVE_VARARGS_H
| 53int snprintf(char* str, size_t size, const char* format, ...);
54int vsnprintf(char* str, size_t size, const char* format, va_list arg);
|
11
| 55
|
12/**************************************************************
13 * Original:
14 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
15 * A bombproof version of doprnt (dopr) included.
16 * Sigh. This sort of thing is always nasty do deal with. Note that
17 * the version here does not include floating point...
| 56/**
57 * Very portable snprintf implementation, limited in functionality,
58 * esp. for %[capital] %[nonportable] and so on. Reduced float functionality,
59 * mostly in formatting and range (e+-16), for %f and %g.
|
18 *
| 60 *
|
19 * snprintf() is used instead of sprintf() as it does limit checks
20 * for string length. This covers a nasty loophole.
21 *
22 * The other functions are there to prevent NULL pointers from
23 * causing nast effects.
24 *
25 * More Recently:
26 * Brandon Long (blong@fiction.net) 9/15/96 for mutt 0.43
27 * This was ugly. It is still ugly. I opted out of floating point
28 * numbers, but the formatter understands just about everything
29 * from the normal C string format, at least as far as I can tell from
30 * the Solaris 2.5 printf(3S) man page.
31 *
32 * Brandon Long (blong@fiction.net) 10/22/97 for mutt 0.87.1
33 * Ok, added some minimal floating point support, which means this
34 * probably requires libm on most operating systems. Don't yet
35 * support the exponent (e,E) and sigfig (g,G). Also, fmtint()
36 * was pretty badly broken, it just wasn't being exercised in ways
37 * which showed it, so that's been fixed. Also, formated the code
38 * to mutt conventions, and removed dead code left over from the
39 * original. Also, there is now a builtin-test, just compile with:
40 * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
41 * and run snprintf for results.
42 *
43 * Wouter Wijngaards(wouter@nlnetlabs.nl) 2/09/2010 for unbound.
44 * Limited support for %g. Does not do the exponents for the before-dot.
45 *
46 **************************************************************/
| 61 * %s, %d, %u, %i, %x, %c, %n and %% are fully supported.
62 * This includes width, precision, flags 0- +, and *(arg for wid,prec).
63 * %f, %g, %m, %p have reduced support, support for wid,prec,flags,*, but
64 * less floating point range, no %e formatting for %g.
65 */
66int snprintf(char* str, size_t size, const char* format, ...)
67{
68 int r;
69 va_list args;
70 va_start(args, format);
71 r = vsnprintf(str, size, format, args);
72 va_end(args);
73 return r;
74}
|
47
| 75
|
| 76/** add padding to string */
77static void
78print_pad(char** at, size_t* left, int* ret, char p, int num)
79{
80 while(num--) {
81 if(*left > 1) {
82 *(*at)++ = p;
83 (*left)--;
84 }
85 (*ret)++;
86 }
87}
|
48
| 88
|
49/* varargs declarations: */
| 89/** get negative symbol, 0 if none */
90static char
91get_negsign(int negative, int plus, int space)
92{
93 if(negative)
94 return '-';
95 if(plus)
96 return '+';
97 if(space)
98 return ' ';
99 return 0;
100}
|
50
| 101
|
51#if defined(HAVE_STDARG_H)
52# include <stdarg.h>
53# define HAVE_STDARGS /* let's hope that works everywhere (mj) */
54# define VA_LOCAL_DECL va_list ap
55# define VA_START(f) va_start(ap, f)
56# define VA_SHIFT(v,t) ; /* no-op for ANSI */
57# define VA_END va_end(ap)
58#else
59# if defined(HAVE_VARARGS_H)
60# include <varargs.h>
61# undef HAVE_STDARGS
62# define VA_LOCAL_DECL va_list ap
63# define VA_START(f) va_start(ap) /* f is ignored! */
64# define VA_SHIFT(v,t) v = va_arg(ap,t)
65# define VA_END va_end(ap)
66# else
67/*XX ** NO VARARGS ** XX*/
68# endif
69#endif
| 102#define PRINT_DEC_BUFSZ 32 /* 20 is enough for 64 bit decimals */
103/** print decimal into buffer, returns length */
104static int
105print_dec(char* buf, int max, unsigned int value)
106{
107 int i = 0;
108 if(value == 0) {
109 if(max > 0) {
110 buf[0] = '0';
111 i = 1;
112 }
113 } else while(value && i < max) {
114 buf[i++] = '0' + value % 10;
115 value /= 10;
116 }
117 return i;
118}
|
70
| 119
|
71int snprintf (char *str, size_t count, const char *fmt, ...);
72int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
| 120/** print long decimal into buffer, returns length */
121static int
122print_dec_l(char* buf, int max, unsigned long value)
123{
124 int i = 0;
125 if(value == 0) {
126 if(max > 0) {
127 buf[0] = '0';
128 i = 1;
129 }
130 } else while(value && i < max) {
131 buf[i++] = '0' + value % 10;
132 value /= 10;
133 }
134 return i;
135}
|
73
| 136
|
74static void dopr (char *buffer, size_t maxlen, const char *format,
75 va_list args);
76static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
77 char *value, int flags, int min, int max);
78static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
79 long value, int base, int min, int max, int flags);
80static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
81 long double fvalue, int min, int max, int flags, int conv);
82static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );
| 137/** print long decimal into buffer, returns length */
138static int
139print_dec_ll(char* buf, int max, unsigned long long value)
140{
141 int i = 0;
142 if(value == 0) {
143 if(max > 0) {
144 buf[0] = '0';
145 i = 1;
146 }
147 } else while(value && i < max) {
148 buf[i++] = '0' + value % 10;
149 value /= 10;
150 }
151 return i;
152}
|
83
| 153
|
84int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
| 154/** print hex into buffer, returns length */
155static int
156print_hex(char* buf, int max, unsigned int value)
|
85{
| 157{
|
86 str[0] = 0;
87 dopr(str, count, fmt, args);
88 return(strlen(str));
| 158 const char* h = "0123456789abcdef";
159 int i = 0;
160 if(value == 0) {
161 if(max > 0) {
162 buf[0] = '0';
163 i = 1;
164 }
165 } else while(value && i < max) {
166 buf[i++] = h[value & 0x0f];
167 value >>= 4;
168 }
169 return i;
|
89}
90
| 170}
171
|
91/* VARARGS3 */
92#ifdef HAVE_STDARGS
93int snprintf (char *str,size_t count,const char *fmt,...)
94#else
95int snprintf (va_alist) va_dcl
96#endif
| 172/** print long hex into buffer, returns length */
173static int
174print_hex_l(char* buf, int max, unsigned long value)
|
97{
| 175{
|
98#ifndef HAVE_STDARGS
99 char *str;
100 size_t count;
101 char *fmt;
102#endif
103 VA_LOCAL_DECL;
104
105 VA_START (fmt);
106 VA_SHIFT (str, char *);
107 VA_SHIFT (count, size_t );
108 VA_SHIFT (fmt, char *);
109 (void) vsnprintf(str, count, fmt, ap);
110 VA_END;
111 return(strlen(str));
| 176 const char* h = "0123456789abcdef";
177 int i = 0;
178 if(value == 0) {
179 if(max > 0) {
180 buf[0] = '0';
181 i = 1;
182 }
183 } else while(value && i < max) {
184 buf[i++] = h[value & 0x0f];
185 value >>= 4;
186 }
187 return i;
|
112}
113
| 188}
189
|
114/*
115 * dopr(): poor man's version of doprintf
116 */
| 190/** print long long hex into buffer, returns length */
191static int
192print_hex_ll(char* buf, int max, unsigned long long value)
193{
194 const char* h = "0123456789abcdef";
195 int i = 0;
196 if(value == 0) {
197 if(max > 0) {
198 buf[0] = '0';
199 i = 1;
200 }
201 } else while(value && i < max) {
202 buf[i++] = h[value & 0x0f];
203 value >>= 4;
204 }
205 return i;
206}
|
117
| 207
|
118/* format read states */
119#define DP_S_DEFAULT 0
120#define DP_S_FLAGS 1
121#define DP_S_MIN 2
122#define DP_S_DOT 3
123#define DP_S_MAX 4
124#define DP_S_MOD 5
125#define DP_S_CONV 6
126#define DP_S_DONE 7
| 208/** copy string into result, reversed */
209static void
210spool_str_rev(char** at, size_t* left, int* ret, const char* buf, int len)
211{
212 int i = len;
213 while(i) {
214 if(*left > 1) {
215 *(*at)++ = buf[--i];
216 (*left)--;
217 } else --i;
218 (*ret)++;
219 }
220}
|
127
| 221
|
128/* format flags - Bits */
129#define DP_F_MINUS 1
130#define DP_F_PLUS 2
131#define DP_F_SPACE 4
132#define DP_F_NUM 8
133#define DP_F_ZERO 16
134#define DP_F_UP 32
| 222/** copy string into result */
223static void
224spool_str(char** at, size_t* left, int* ret, const char* buf, int len)
225{
226 int i;
227 for(i=0; i<len; i++) {
228 if(*left > 1) {
229 *(*at)++ = buf[i];
230 (*left)--;
231 }
232 (*ret)++;
233 }
234}
|
135
| 235
|
136/* Conversion Flags */
137#define DP_C_SHORT 1
138#define DP_C_LONG 2
139#define DP_C_LDOUBLE 3
| 236/** print number formatted */
237static void
238print_num(char** at, size_t* left, int* ret, int minw, int precision,
239 int prgiven, int zeropad, int minus, int plus, int space,
240 int zero, int negative, char* buf, int len)
241{
242 int w = len; /* excludes minus sign */
243 char s = get_negsign(negative, plus, space);
244 if(minus) {
245 /* left adjust the number into the field, space padding */
246 /* calc numw = [sign][zeroes][number] */
247 int numw = w;
248 if(precision == 0 && zero) numw = 0;
249 if(numw < precision) numw = precision;
250 if(s) numw++;
|
140
| 251
|
141#define char_to_int(p) (p - '0')
142#ifndef MAX
143#define MAX(p,q) ((p >= q) ? p : q)
144#endif
| 252 /* sign */
253 if(s) print_pad(at, left, ret, s, 1);
|
145
| 254
|
146static void dopr (char *buffer, size_t maxlen, const char *format, va_list args)
147{
148 char ch;
149 long value;
150 long double fvalue;
151 char *strvalue;
152 int min;
153 int max;
154 int state;
155 int flags;
156 int cflags;
157 size_t currlen;
158
159 state = DP_S_DEFAULT;
160 currlen = flags = cflags = min = 0;
161 max = -1;
162 ch = *format++;
| 255 /* number */
256 if(precision == 0 && zero) {
257 /* "" for the number */
258 } else {
259 if(w < precision)
260 print_pad(at, left, ret, '0', precision - w);
261 spool_str_rev(at, left, ret, buf, len);
262 }
263 /* spaces */
264 if(numw < minw)
265 print_pad(at, left, ret, ' ', minw - numw);
266 } else {
267 /* pad on the left of the number */
268 /* calculate numw has width of [sign][zeroes][number] */
269 int numw = w;
270 if(precision == 0 && zero) numw = 0;
271 if(numw < precision) numw = precision;
272 if(!prgiven && zeropad && numw < minw) numw = minw;
273 else if(s) numw++;
|
163
| 274
|
164 while (state != DP_S_DONE)
165 {
166 if ((ch == '\0') || (currlen >= maxlen))
167 state = DP_S_DONE;
| 275 /* pad with spaces */
276 if(numw < minw)
277 print_pad(at, left, ret, ' ', minw - numw);
278 /* print sign (and one less zeropad if so) */
279 if(s) {
280 print_pad(at, left, ret, s, 1);
281 numw--;
282 }
283 /* pad with zeroes */
284 if(w < numw)
285 print_pad(at, left, ret, '0', numw - w);
286 if(precision == 0 && zero)
287 return;
288 /* print the characters for the value */
289 spool_str_rev(at, left, ret, buf, len);
290 }
291}
|
168
| 292
|
169 switch(state)
170 {
171 case DP_S_DEFAULT:
172 if (ch == '%')
173 state = DP_S_FLAGS;
174 else
175 dopr_outch (buffer, &currlen, maxlen, ch);
176 ch = *format++;
177 break;
178 case DP_S_FLAGS:
179 switch (ch)
180 {
181 case '-':
182 flags |= DP_F_MINUS;
183 ch = *format++;
184 break;
185 case '+':
186 flags |= DP_F_PLUS;
187 ch = *format++;
188 break;
189 case ' ':
190 flags |= DP_F_SPACE;
191 ch = *format++;
192 break;
193 case '#':
194 flags |= DP_F_NUM;
195 ch = *format++;
196 break;
197 case '0':
198 flags |= DP_F_ZERO;
199 ch = *format++;
200 break;
201 default:
202 state = DP_S_MIN;
203 break;
204 }
205 break;
206 case DP_S_MIN:
207 if (isdigit(ch))
208 {
209 min = 10*min + char_to_int (ch);
210 ch = *format++;
211 }
212 else if (ch == '*')
213 {
214 min = va_arg (args, int);
215 ch = *format++;
216 state = DP_S_DOT;
217 }
218 else
219 state = DP_S_DOT;
220 break;
221 case DP_S_DOT:
222 if (ch == '.')
223 {
224 state = DP_S_MAX;
225 ch = *format++;
226 }
227 else
228 state = DP_S_MOD;
229 break;
230 case DP_S_MAX:
231 if (isdigit(ch))
232 {
233 if (max < 0)
234 max = 0;
235 max = 10*max + char_to_int (ch);
236 ch = *format++;
237 }
238 else if (ch == '*')
239 {
240 max = va_arg (args, int);
241 ch = *format++;
242 state = DP_S_MOD;
243 }
244 else
245 state = DP_S_MOD;
246 break;
247 case DP_S_MOD:
248 /* Currently, we don't support Long Long, bummer */
249 switch (ch)
250 {
251 case 'h':
252 cflags = DP_C_SHORT;
253 ch = *format++;
254 break;
255 case 'l':
256 cflags = DP_C_LONG;
257 ch = *format++;
258 break;
259 case 'L':
260 cflags = DP_C_LDOUBLE;
261 ch = *format++;
262 break;
263 default:
264 break;
265 }
266 state = DP_S_CONV;
267 break;
268 case DP_S_CONV:
269 switch (ch)
270 {
271 case 'd':
272 case 'i':
273 if (cflags == DP_C_SHORT)
274 value = va_arg (args, int);
275 else if (cflags == DP_C_LONG)
276 value = va_arg (args, long int);
277 else
278 value = va_arg (args, int);
279 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
280 break;
281 case 'o':
282 flags &= ~DP_F_PLUS;
283 if (cflags == DP_C_SHORT)
284 value = va_arg (args, unsigned int);
285 else if (cflags == DP_C_LONG)
286 value = va_arg (args, unsigned long int);
287 else
288 value = va_arg (args, unsigned int);
289 fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
290 break;
291 case 'u':
292 flags &= ~DP_F_PLUS;
293 if (cflags == DP_C_SHORT)
294 value = va_arg (args, unsigned int);
295 else if (cflags == DP_C_LONG)
296 value = va_arg (args, unsigned long int);
297 else
298 value = va_arg (args, unsigned int);
299 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
300 break;
301 case 'X':
302 flags |= DP_F_UP;
303 case 'x':
304 flags &= ~DP_F_PLUS;
305 if (cflags == DP_C_SHORT)
306 value = va_arg (args, unsigned int);
307 else if (cflags == DP_C_LONG)
308 value = va_arg (args, unsigned long int);
309 else
310 value = va_arg (args, unsigned int);
311 fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
312 break;
313 case 'f':
314 if (cflags == DP_C_LDOUBLE)
315 fvalue = va_arg (args, long double);
316 else
317 fvalue = va_arg (args, double);
318 /* um, floating point? */
319 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags, 'f');
320 break;
321 case 'E':
322 flags |= DP_F_UP;
323 case 'e':
324 if (cflags == DP_C_LDOUBLE)
325 fvalue = va_arg (args, long double);
326 else
327 fvalue = va_arg (args, double);
328 break;
329 case 'G':
330 flags |= DP_F_UP;
331 case 'g':
332 if (cflags == DP_C_LDOUBLE)
333 fvalue = va_arg (args, long double);
334 else
335 fvalue = va_arg (args, double);
336 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags, 'g');
337 break;
338 case 'c':
339 dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
340 break;
341 case 's':
342 strvalue = va_arg (args, char *);
343 if (max < 0)
344 max = maxlen; /* ie, no max */
345 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
346 break;
347 case 'p':
348 strvalue = va_arg (args, void *);
349 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
350 break;
351 case 'n':
352 if (cflags == DP_C_SHORT)
353 {
354 short int *num;
355 num = va_arg (args, short int *);
356 *num = currlen;
357 }
358 else if (cflags == DP_C_LONG)
359 {
360 long int *num;
361 num = va_arg (args, long int *);
362 *num = currlen;
363 }
364 else
365 {
366 int *num;
367 num = va_arg (args, int *);
368 *num = currlen;
369 }
370 break;
371 case '%':
372 dopr_outch (buffer, &currlen, maxlen, ch);
373 break;
374 case 'w':
375 /* not supported yet, treat as next char */
376 ch = *format++;
377 break;
378 default:
379 /* Unknown, skip */
380 break;
381 }
382 ch = *format++;
383 state = DP_S_DEFAULT;
384 flags = cflags = min = 0;
385 max = -1;
386 break;
387 case DP_S_DONE:
388 break;
389 default:
390 /* hmm? */
391 break; /* some picky compilers need this */
392 }
393 }
394 if (currlen < maxlen - 1)
395 buffer[currlen] = '\0';
396 else
397 buffer[maxlen - 1] = '\0';
| 293/** print %d and %i */
294static void
295print_num_d(char** at, size_t* left, int* ret, int value,
296 int minw, int precision, int prgiven, int zeropad, int minus,
297 int plus, int space)
298{
299 char buf[PRINT_DEC_BUFSZ];
300 int negative = (value < 0);
301 int zero = (value == 0);
302 int len = print_dec(buf, (int)sizeof(buf),
303 (unsigned int)(negative?-value:value));
304 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
305 plus, space, zero, negative, buf, len);
|
398}
399
| 306}
307
|
400static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
401 char *value, int flags, int min, int max)
| 308/** print %ld and %li */
309static void
310print_num_ld(char** at, size_t* left, int* ret, long value,
311 int minw, int precision, int prgiven, int zeropad, int minus,
312 int plus, int space)
|
402{
| 313{
|
403 int padlen, strln; /* amount to pad */
404 int cnt = 0;
405
406 if (value == 0)
407 {
408 value = "<NULL>";
409 }
| 314 char buf[PRINT_DEC_BUFSZ];
315 int negative = (value < 0);
316 int zero = (value == 0);
317 int len = print_dec_l(buf, (int)sizeof(buf),
318 (unsigned long)(negative?-value:value));
319 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
320 plus, space, zero, negative, buf, len);
321}
|
410
| 322
|
411 for (strln = 0; value[strln]; ++strln); /* strlen */
412 padlen = min - strln;
413 if (padlen < 0)
414 padlen = 0;
415 if (flags & DP_F_MINUS)
416 padlen = -padlen; /* Left Justify */
| 323/** print %lld and %lli */
324static void
325print_num_lld(char** at, size_t* left, int* ret, long long value,
326 int minw, int precision, int prgiven, int zeropad, int minus,
327 int plus, int space)
328{
329 char buf[PRINT_DEC_BUFSZ];
330 int negative = (value < 0);
331 int zero = (value == 0);
332 int len = print_dec_ll(buf, (int)sizeof(buf),
333 (unsigned long long)(negative?-value:value));
334 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
335 plus, space, zero, negative, buf, len);
336}
|
417
| 337
|
418 while ((padlen > 0) && (cnt < max))
419 {
420 dopr_outch (buffer, currlen, maxlen, ' ');
421 --padlen;
422 ++cnt;
423 }
424 while (*value && (cnt < max))
425 {
426 dopr_outch (buffer, currlen, maxlen, *value++);
427 ++cnt;
428 }
429 while ((padlen < 0) && (cnt < max))
430 {
431 dopr_outch (buffer, currlen, maxlen, ' ');
432 ++padlen;
433 ++cnt;
434 }
| 338/** print %u */
339static void
340print_num_u(char** at, size_t* left, int* ret, unsigned int value,
341 int minw, int precision, int prgiven, int zeropad, int minus,
342 int plus, int space)
343{
344 char buf[PRINT_DEC_BUFSZ];
345 int negative = 0;
346 int zero = (value == 0);
347 int len = print_dec(buf, (int)sizeof(buf), value);
348 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
349 plus, space, zero, negative, buf, len);
|
435}
436
| 350}
351
|
437/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
| 352/** print %lu */
353static void
354print_num_lu(char** at, size_t* left, int* ret, unsigned long value,
355 int minw, int precision, int prgiven, int zeropad, int minus,
356 int plus, int space)
357{
358 char buf[PRINT_DEC_BUFSZ];
359 int negative = 0;
360 int zero = (value == 0);
361 int len = print_dec_l(buf, (int)sizeof(buf), value);
362 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
363 plus, space, zero, negative, buf, len);
364}
|
438
| 365
|
439static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
440 long value, int base, int min, int max, int flags)
| 366/** print %llu */
367static void
368print_num_llu(char** at, size_t* left, int* ret, unsigned long long value,
369 int minw, int precision, int prgiven, int zeropad, int minus,
370 int plus, int space)
|
441{
| 371{
|
442 int signvalue = 0;
443 unsigned long uvalue;
444 char convert[20];
445 int place = 0;
446 int spadlen = 0; /* amount to space pad */
447 int zpadlen = 0; /* amount to zero pad */
448 int caps = 0;
449
450 if (max < 0)
451 max = 0;
| 372 char buf[PRINT_DEC_BUFSZ];
373 int negative = 0;
374 int zero = (value == 0);
375 int len = print_dec_ll(buf, (int)sizeof(buf), value);
376 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
377 plus, space, zero, negative, buf, len);
378}
|
452
| 379
|
453 uvalue = value;
454 if( value < 0 ) {
455 signvalue = '-';
456 uvalue = -value;
457 }
458 else
459 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
460 signvalue = '+';
461 else
462 if (flags & DP_F_SPACE)
463 signvalue = ' ';
| 380/** print %x */
381static void
382print_num_x(char** at, size_t* left, int* ret, unsigned int value,
383 int minw, int precision, int prgiven, int zeropad, int minus,
384 int plus, int space)
385{
386 char buf[PRINT_DEC_BUFSZ];
387 int negative = 0;
388 int zero = (value == 0);
389 int len = print_hex(buf, (int)sizeof(buf), value);
390 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
391 plus, space, zero, negative, buf, len);
392}
|
464
| 393
|
465 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
| 394/** print %lx */
395static void
396print_num_lx(char** at, size_t* left, int* ret, unsigned long value,
397 int minw, int precision, int prgiven, int zeropad, int minus,
398 int plus, int space)
399{
400 char buf[PRINT_DEC_BUFSZ];
401 int negative = 0;
402 int zero = (value == 0);
403 int len = print_hex_l(buf, (int)sizeof(buf), value);
404 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
405 plus, space, zero, negative, buf, len);
406}
|
466
| 407
|
467 do {
468 convert[place++] =
469 (caps? "0123456789ABCDEF":"0123456789abcdef")
470 [uvalue % (unsigned)base ];
471 uvalue = (uvalue / (unsigned)base );
472 } while(uvalue && (place < 20));
473 if (place == 20) place--;
474 convert[place] = 0;
| 408/** print %llx */
409static void
410print_num_llx(char** at, size_t* left, int* ret, unsigned long long value,
411 int minw, int precision, int prgiven, int zeropad, int minus,
412 int plus, int space)
413{
414 char buf[PRINT_DEC_BUFSZ];
415 int negative = 0;
416 int zero = (value == 0);
417 int len = print_hex_ll(buf, (int)sizeof(buf), value);
418 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
419 plus, space, zero, negative, buf, len);
420}
|
475
| 421
|
476 zpadlen = max - place;
477 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
478 if (zpadlen < 0) zpadlen = 0;
479 if (spadlen < 0) spadlen = 0;
480 if (flags & DP_F_ZERO)
481 {
482 zpadlen = MAX(zpadlen, spadlen);
483 spadlen = 0;
484 }
485 if (flags & DP_F_MINUS)
486 spadlen = -spadlen; /* Left Justifty */
487
488#ifdef DEBUG_SNPRINTF
489 dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
490 zpadlen, spadlen, min, max, place));
| 422/** print %llp */
423static void
424print_num_llp(char** at, size_t* left, int* ret, void* value,
425 int minw, int precision, int prgiven, int zeropad, int minus,
426 int plus, int space)
427{
428 char buf[PRINT_DEC_BUFSZ];
429 int negative = 0;
430 int zero = (value == 0);
431#if defined(UINTPTR_MAX) && defined(UINT32_MAX) && (UINTPTR_MAX == UINT32_MAX)
432 /* avoid warning about upcast on 32bit systems */
433 unsigned long long llvalue = (unsigned long)value;
434#else
435 unsigned long long llvalue = (unsigned long long)value;
|
491#endif
| 436#endif
|
| 437 int len = print_hex_ll(buf, (int)sizeof(buf), llvalue);
438 if(zero) {
439 buf[0]=')';
440 buf[1]='l';
441 buf[2]='i';
442 buf[3]='n';
443 buf[4]='(';
444 len = 5;
445 } else {
446 /* put '0x' in front of the (reversed) buffer result */
447 if(len < PRINT_DEC_BUFSZ)
448 buf[len++] = 'x';
449 if(len < PRINT_DEC_BUFSZ)
450 buf[len++] = '0';
451 }
452 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus,
453 plus, space, zero, negative, buf, len);
454}
|
492
| 455
|
493 /* Spaces */
494 while (spadlen > 0)
495 {
496 dopr_outch (buffer, currlen, maxlen, ' ');
497 --spadlen;
498 }
| 456#define PRINT_FLOAT_BUFSZ 64 /* xx.yy with 20.20 about the max */
457/** spool remainder after the decimal point to buffer, in reverse */
458static int
459print_remainder(char* buf, int max, double r, int prec)
460{
461 unsigned long long cap = 1;
462 unsigned long long value;
463 int len, i;
464 if(prec > 19) prec = 19; /* max we can do */
465 if(max < prec) return 0;
466 for(i=0; i<prec; i++) {
467 cap *= 10;
468 }
469 r *= (double)cap;
470 value = (unsigned long long)r;
471 /* see if we need to round up */
472 if(((unsigned long long)((r - (double)value)*10.0)) >= 5) {
473 value++;
474 /* that might carry to numbers before the comma, if so,
475 * just ignore that rounding. failure because 64bitprintout */
476 if(value >= cap)
477 value = cap-1;
478 }
479 len = print_dec_ll(buf, max, value);
480 while(len < prec) { /* pad with zeroes, e.g. if 0.0012 */
481 buf[len++] = '0';
482 }
483 if(len < max)
484 buf[len++] = '.';
485 return len;
486}
|
499
| 487
|
500 /* Sign */
501 if (signvalue)
502 dopr_outch (buffer, currlen, maxlen, signvalue);
| 488/** spool floating point to buffer */
489static int
490print_float(char* buf, int max, double value, int prec)
491{
492 /* as xxx.xxx if prec==0, no '.', with prec decimals after . */
493 /* no conversion for NAN and INF, because we do not want to require
494 linking with -lm. */
495 /* Thus, the conversions use 64bit integers to convert the numbers,
496 * which makes 19 digits before and after the decimal point the max */
497 unsigned long long whole = (unsigned long long)value;
498 double remain = value - (double)whole;
499 int len = 0;
500 if(prec != 0)
501 len = print_remainder(buf, max, remain, prec);
502 len += print_dec_ll(buf+len, max-len, whole);
503 return len;
504}
|
503
| 505
|
504 /* Zeros */
505 if (zpadlen > 0)
506 {
507 while (zpadlen > 0)
508 {
509 dopr_outch (buffer, currlen, maxlen, '0');
510 --zpadlen;
511 }
512 }
513
514 /* Digits */
515 while (place > 0)
516 dopr_outch (buffer, currlen, maxlen, convert[--place]);
517
518 /* Left Justified spaces */
519 while (spadlen < 0) {
520 dopr_outch (buffer, currlen, maxlen, ' ');
521 ++spadlen;
522 }
| 506/** print %f */
507static void
508print_num_f(char** at, size_t* left, int* ret, double value,
509 int minw, int precision, int prgiven, int zeropad, int minus,
510 int plus, int space)
511{
512 char buf[PRINT_FLOAT_BUFSZ];
513 int negative = (value < 0);
514 int zero = 0;
515 int len;
516 if(!prgiven) precision = 6;
517 len = print_float(buf, (int)sizeof(buf), negative?-value:value,
518 precision);
519 print_num(at, left, ret, minw, 1, 0, zeropad, minus,
520 plus, space, zero, negative, buf, len);
|
523}
524
| 521}
522
|
525static long double abs_val (long double value)
| 523/* rudimentary %g support */
524static int
525print_float_g(char* buf, int max, double value, int prec)
|
526{
| 526{
|
527 long double result = value;
| 527 unsigned long long whole = (unsigned long long)value;
528 double remain = value - (double)whole;
529 int before = 0;
530 int len = 0;
|
528
| 531
|
529 if (value < 0)
530 result = -value;
| 532 /* number of digits before the decimal point */
533 while(whole > 0) {
534 before++;
535 whole /= 10;
536 }
537 whole = (unsigned long long)value;
|
531
| 538
|
532 return result;
| 539 if(prec > before && remain != 0.0) {
540 /* see if the last decimals are zero, if so, skip them */
541 len = print_remainder(buf, max, remain, prec-before);
542 while(len > 0 && buf[0]=='0') {
543 memmove(buf, buf+1, --len);
544 }
545 }
546 len += print_dec_ll(buf+len, max-len, whole);
547 return len;
|
533}
534
| 548}
549
|
535static long double compat_pow10 (int exp)
| 550
551/** print %g */
552static void
553print_num_g(char** at, size_t* left, int* ret, double value,
554 int minw, int precision, int prgiven, int zeropad, int minus,
555 int plus, int space)
|
536{
| 556{
|
537 long double result = 1;
| 557 char buf[PRINT_FLOAT_BUFSZ];
558 int negative = (value < 0);
559 int zero = 0;
560 int len;
561 if(!prgiven) precision = 6;
562 if(precision == 0) precision = 1;
563 len = print_float_g(buf, (int)sizeof(buf), negative?-value:value,
564 precision);
565 print_num(at, left, ret, minw, 1, 0, zeropad, minus,
566 plus, space, zero, negative, buf, len);
567}
|
538
| 568
|
539 while (exp)
540 {
541 result *= 10;
542 exp--;
543 }
544
545 return result;
| 569
570/** strnlen (compat implementation) */
571static int
572my_strnlen(const char* s, int max)
573{
574 int i;
575 for(i=0; i<max; i++)
576 if(s[i]==0)
577 return i;
578 return max;
|
546}
547
| 579}
580
|
548static long compat_round (long double value)
| 581/** print %s */
582static void
583print_str(char** at, size_t* left, int* ret, char* s,
584 int minw, int precision, int prgiven, int minus)
|
549{
| 585{
|
550 long intpart;
| 586 int w;
587 /* with prec: no more than x characters from this string, stop at 0 */
588 if(prgiven)
589 w = my_strnlen(s, precision);
590 else w = (int)strlen(s); /* up to the nul */
591 if(w < minw && !minus)
592 print_pad(at, left, ret, ' ', minw - w);
593 spool_str(at, left, ret, s, w);
594 if(w < minw && minus)
595 print_pad(at, left, ret, ' ', minw - w);
596}
|
551
| 597
|
552 intpart = value;
553 value = value - intpart;
554 if (value >= 0.5)
555 intpart++;
556
557 return intpart;
| 598/** print %c */
599static void
600print_char(char** at, size_t* left, int* ret, int c,
601 int minw, int minus)
602{
603 if(1 < minw && !minus)
604 print_pad(at, left, ret, ' ', minw - 1);
605 print_pad(at, left, ret, c, 1);
606 if(1 < minw && minus)
607 print_pad(at, left, ret, ' ', minw - 1);
|
558}
559
| 608}
609
|
560static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
561 long double fvalue, int min, int max, int flags, int conv)
| 610
611/**
612 * Print to string.
613 * str: string buffer for result. result will be null terminated.
614 * size: size of the buffer. null is put inside buffer.
615 * format: printf format string.
616 * arg: '...' arguments to print.
617 * returns number of characters. a null is printed after this.
618 * return number of bytes that would have been written
619 * if the buffer had been large enough.
620 *
621 * supported format specifiers:
622 * %s, %u, %d, %x, %i, %f, %g, %c, %p, %n.
623 * length: l, ll (for d, u, x).
624 * precision: 6.6d (for d, u, x)
625 * %f, %g precisions, 0.3f
626 * %20s, '.*s'
627 * and %%.
628 */
629int vsnprintf(char* str, size_t size, const char* format, va_list arg)
|
562{
| 630{
|
563 int signvalue = 0;
564 long double ufvalue;
565 char iconvert[20];
566 char fconvert[20];
567 int iplace = 0;
568 int fplace = 0;
569 int padlen = 0; /* amount to pad */
570 int zpadlen = 0;
571 int caps = 0;
572 long intpart;
573 long fracpart;
574
575 /*
576 * AIX manpage says the default is 0, but Solaris says the default
577 * is 6, and sprintf on AIX defaults to 6
578 */
579 if (max < 0)
580 max = 6;
| 631 char* at = str;
632 size_t left = size;
633 int ret = 0;
634 const char* fmt = format;
635 int conv, minw, precision, prgiven, zeropad, minus, plus, space, length;
636 while(*fmt) {
637 /* copy string before % */
638 while(*fmt && *fmt!='%') {
639 if(left > 1) {
640 *at++ = *fmt++;
641 left--;
642 } else fmt++;
643 ret++;
644 }
645
646 /* see if we are at end */
647 if(!*fmt) break;
|
581
| 648
|
582 ufvalue = abs_val (fvalue);
| 649 /* fetch next argument % designation from format string */
650 fmt++; /* skip the '%' */
|
583
| 651
|
584 if (fvalue < 0)
585 signvalue = '-';
586 else
587 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
588 signvalue = '+';
589 else
590 if (flags & DP_F_SPACE)
591 signvalue = ' ';
| 652 /********************************/
653 /* get the argument designation */
654 /********************************/
655 /* we must do this vararg stuff inside this function for
656 * portability. Hence, get_designation, and print_designation
657 * are not their own functions. */
|
592
| 658
|
593#if 0
594 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
595#endif
| 659 /* printout designation:
660 * conversion specifier: x, d, u, s, c, n, m, p
661 * flags: # not supported
662 * 0 zeropad (on the left)
663 * - left adjust (right by default)
664 * ' ' printspace for positive number (in - position).
665 * + alwayssign
666 * fieldwidth: [1-9][0-9]* minimum field width.
667 * if this is * then type int next argument specifies the minwidth.
668 * if this is negative, the - flag is set (with positive width).
669 * precision: period[digits]*, %.2x.
670 * if this is * then type int next argument specifies the precision.
671 * just '.' or negative value means precision=0.
672 * this is mindigits to print for d, i, u, x
673 * this is aftercomma digits for f
674 * this is max number significant digits for g
675 * maxnumber characters to be printed for s
676 * length: 0-none (int), 1-l (long), 2-ll (long long)
677 * notsupported: hh (char), h (short), L (long double), q, j, z, t
678 * Does not support %m$ and *m$ argument designation as array indices.
679 * Does not support %#x
680 *
681 */
682 minw = 0;
683 precision = 1;
684 prgiven = 0;
685 zeropad = 0;
686 minus = 0;
687 plus = 0;
688 space = 0;
689 length = 0;
|
596
| 690
|
597 intpart = ufvalue;
| 691 /* get flags in any order */
692 for(;;) {
693 if(*fmt == '0')
694 zeropad = 1;
695 else if(*fmt == '-')
696 minus = 1;
697 else if(*fmt == '+')
698 plus = 1;
699 else if(*fmt == ' ')
700 space = 1;
701 else break;
702 fmt++;
703 }
|
598
| 704
|
599 /*
600 * Sorry, we only support 9 digits past the decimal because of our
601 * conversion method
602 */
603 if (max > 9)
604 max = 9;
| 705 /* field width */
706 if(*fmt == '*') {
707 fmt++; /* skip char */
708 minw = va_arg(arg, int);
709 if(minw < 0) {
710 minus = 1;
711 minw = -minw;
712 }
713 } else while(*fmt >= '0' && *fmt <= '9') {
714 minw = minw*10 + (*fmt++)-'0';
715 }
|
605
| 716
|
606 /* We "cheat" by converting the fractional part to integer by
607 * multiplying by a factor of 10
608 */
609 fracpart = compat_round ((compat_pow10 (max)) * (ufvalue - intpart));
| 717 /* precision */
718 if(*fmt == '.') {
719 fmt++; /* skip period */
720 prgiven = 1;
721 precision = 0;
722 if(*fmt == '*') {
723 fmt++; /* skip char */
724 precision = va_arg(arg, int);
725 if(precision < 0)
726 precision = 0;
727 } else while(*fmt >= '0' && *fmt <= '9') {
728 precision = precision*10 + (*fmt++)-'0';
729 }
730 }
|
610
| 731
|
611 if (fracpart >= compat_pow10 (max))
612 {
613 intpart++;
614 fracpart -= compat_pow10 (max);
615 }
| 732 /* length */
733 if(*fmt == 'l') {
734 fmt++; /* skip char */
735 length = 1;
736 if(*fmt == 'l') {
737 fmt++; /* skip char */
738 length = 2;
739 }
740 }
|
616
| 741
|
617#ifdef DEBUG_SNPRINTF
618 dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart));
619#endif
| 742 /* get the conversion */
743 if(!*fmt) conv = 0;
744 else conv = *fmt++;
|
620
| 745
|
621 /* Convert integer part */
622 do {
623 iconvert[iplace++] =
624 (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
625 intpart = (intpart / 10);
626 } while(intpart && (iplace < 20));
627 if (iplace == 20) iplace--;
628 iconvert[iplace] = 0;
| 746 /***********************************/
747 /* print that argument designation */
748 /***********************************/
749 switch(conv) {
750 case 'i':
751 case 'd':
752 if(length == 0)
753 print_num_d(&at, &left, &ret, va_arg(arg, int),
754 minw, precision, prgiven, zeropad, minus, plus, space);
755 else if(length == 1)
756 print_num_ld(&at, &left, &ret, va_arg(arg, long),
757 minw, precision, prgiven, zeropad, minus, plus, space);
758 else if(length == 2)
759 print_num_lld(&at, &left, &ret,
760 va_arg(arg, long long),
761 minw, precision, prgiven, zeropad, minus, plus, space);
762 break;
763 case 'u':
764 if(length == 0)
765 print_num_u(&at, &left, &ret,
766 va_arg(arg, unsigned int),
767 minw, precision, prgiven, zeropad, minus, plus, space);
768 else if(length == 1)
769 print_num_lu(&at, &left, &ret,
770 va_arg(arg, unsigned long),
771 minw, precision, prgiven, zeropad, minus, plus, space);
772 else if(length == 2)
773 print_num_llu(&at, &left, &ret,
774 va_arg(arg, unsigned long long),
775 minw, precision, prgiven, zeropad, minus, plus, space);
776 break;
777 case 'x':
778 if(length == 0)
779 print_num_x(&at, &left, &ret,
780 va_arg(arg, unsigned int),
781 minw, precision, prgiven, zeropad, minus, plus, space);
782 else if(length == 1)
783 print_num_lx(&at, &left, &ret,
784 va_arg(arg, unsigned long),
785 minw, precision, prgiven, zeropad, minus, plus, space);
786 else if(length == 2)
787 print_num_llx(&at, &left, &ret,
788 va_arg(arg, unsigned long long),
789 minw, precision, prgiven, zeropad, minus, plus, space);
790 break;
791 case 's':
792 print_str(&at, &left, &ret, va_arg(arg, char*),
793 minw, precision, prgiven, minus);
794 break;
795 case 'c':
796 print_char(&at, &left, &ret, va_arg(arg, int),
797 minw, minus);
798 break;
799 case 'n':
800 *va_arg(arg, int*) = ret;
801 break;
802 case 'm':
803 print_str(&at, &left, &ret, strerror(errno),
804 minw, precision, prgiven, minus);
805 break;
806 case 'p':
807 print_num_llp(&at, &left, &ret, va_arg(arg, void*),
808 minw, precision, prgiven, zeropad, minus, plus, space);
809 break;
810 case '%':
811 print_pad(&at, &left, &ret, '%', 1);
812 break;
813 case 'f':
814 print_num_f(&at, &left, &ret, va_arg(arg, double),
815 minw, precision, prgiven, zeropad, minus, plus, space);
816 break;
817 case 'g':
818 print_num_g(&at, &left, &ret, va_arg(arg, double),
819 minw, precision, prgiven, zeropad, minus, plus, space);
820 break;
821 /* unknown */
822 default:
823 case 0: break;
824 }
825 }
|
629
| 826
|
630 /* Convert fractional part */
631 do {
632 fconvert[fplace++] =
633 (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
634 fracpart = (fracpart / 10);
635 if(conv == 'g' && fplace == 1 && fconvert[0] == '0') {
636 fplace = 0; /* skip trailing zeroes for %g */
637 zpadlen ++;
638 }
639 } while(fracpart && (fplace < 20));
640 if (fplace == 20) fplace--;
641 fconvert[fplace] = 0;
| 827 /* zero terminate */
828 if(left > 0)
829 *at = 0;
830 return ret;
831}
|
642
| 832
|
643 if(conv == 'f') {
644 /* -1 for decimal point, another -1 if we are printing a sign */
645 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
646 zpadlen = max - fplace;
647 } else if(conv == 'g') {
648 /* zpadlen contains number of trailing zeroes removed */
649 padlen = min - iplace - (max-zpadlen) - 1 - ((signvalue) ? 1 : 0);
650 if(fplace == 0) {
651 padlen += 1; /* add the decimal dot suppressed */
652 zpadlen = 0;
653 } else zpadlen = (max-zpadlen) - fplace;
654 }
655 if (zpadlen < 0)
656 zpadlen = 0;
657 if (padlen < 0)
658 padlen = 0;
659 if (flags & DP_F_MINUS)
660 padlen = -padlen; /* Left Justifty */
| 833#ifdef SNPRINTF_TEST
|
661
| 834
|
662 if ((flags & DP_F_ZERO) && (padlen > 0))
663 {
664 if (signvalue)
665 {
666 dopr_outch (buffer, currlen, maxlen, signvalue);
667 --padlen;
668 signvalue = 0;
669 }
670 while (padlen > 0)
671 {
672 dopr_outch (buffer, currlen, maxlen, '0');
673 --padlen;
674 }
675 }
676 while (padlen > 0)
677 {
678 dopr_outch (buffer, currlen, maxlen, ' ');
679 --padlen;
680 }
681 if (signvalue)
682 dopr_outch (buffer, currlen, maxlen, signvalue);
| 835/** do tests */
836#undef snprintf
837#define DOTEST(bufsz, result, retval, ...) do { \
838 char buf[bufsz]; \
839 printf("now test %s\n", #__VA_ARGS__); \
840 int r=my_snprintf(buf, sizeof(buf), __VA_ARGS__); \
841 if(r != retval || strcmp(buf, result) != 0) { \
842 printf("error test(%s) was \"%s\":%d\n", \
843 ""#bufsz", "#result", "#retval", "#__VA_ARGS__, \
844 buf, r); \
845 exit(1); \
846 } \
847 r=snprintf(buf, sizeof(buf), __VA_ARGS__); \
848 if(r != retval || strcmp(buf, result) != 0) { \
849 printf("error test(%s) differs with system, \"%s\":%d\n", \
850 ""#bufsz", "#result", "#retval", "#__VA_ARGS__, \
851 buf, r); \
852 exit(1); \
853 } \
854 printf("test(\"%s\":%d) passed\n", buf, r); \
855 } while(0);
|
683
| 856
|
684 while (iplace > 0)
685 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
| 857/** test program */
858int main(void)
859{
860 int x = 0;
|
686
| 861
|
687 /* for %g do not output decimal point if no fraction is present */
688 if(conv == 'f' || (conv == 'g' && fplace > 0)) {
689 /*
690 * Decimal point. This should probably use locale to find the correct
691 * char to print out.
692 */
693 dopr_outch (buffer, currlen, maxlen, '.');
694 }
| 862 /* bufsize, expectedstring, expectedretval, snprintf arguments */
863 DOTEST(1024, "hello", 5, "hello");
864 DOTEST(1024, "h", 1, "h");
865 /* warning from gcc for format string, but it does work
866 * DOTEST(1024, "", 0, ""); */
|
695
| 867
|
696 while (zpadlen > 0)
697 {
698 dopr_outch (buffer, currlen, maxlen, '0');
699 --zpadlen;
700 }
| 868 DOTEST(3, "he", 5, "hello");
869 DOTEST(1, "", 7, "%d", 7823089);
|
701
| 870
|
702 while (fplace > 0)
703 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
| 871 /* test positive numbers */
872 DOTEST(1024, "0", 1, "%d", 0);
873 DOTEST(1024, "1", 1, "%d", 1);
874 DOTEST(1024, "9", 1, "%d", 9);
875 DOTEST(1024, "15", 2, "%d", 15);
876 DOTEST(1024, "ab15cd", 6, "ab%dcd", 15);
877 DOTEST(1024, "167", 3, "%d", 167);
878 DOTEST(1024, "7823089", 7, "%d", 7823089);
879 DOTEST(1024, " 12", 3, "%3d", 12);
880 DOTEST(1024, "012", 3, "%.3d", 12);
881 DOTEST(1024, "012", 3, "%3.3d", 12);
882 DOTEST(1024, "012", 3, "%03d", 12);
883 DOTEST(1024, " 012", 4, "%4.3d", 12);
884 DOTEST(1024, "", 0, "%.0d", 0);
|
704
| 885
|
705 while (padlen < 0)
706 {
707 dopr_outch (buffer, currlen, maxlen, ' ');
708 ++padlen;
709 }
710}
| 886 /* test negative numbers */
887 DOTEST(1024, "-1", 2, "%d", -1);
888 DOTEST(1024, "-12", 3, "%3d", -12);
889 DOTEST(1024, " -2", 3, "%3d", -2);
890 DOTEST(1024, "-012", 4, "%.3d", -12);
891 DOTEST(1024, "-012", 4, "%3.3d", -12);
892 DOTEST(1024, "-012", 4, "%4.3d", -12);
893 DOTEST(1024, " -012", 5, "%5.3d", -12);
894 DOTEST(1024, "-12", 3, "%03d", -12);
895 DOTEST(1024, "-02", 3, "%03d", -2);
896 DOTEST(1024, "-15", 3, "%d", -15);
897 DOTEST(1024, "-7307", 5, "%d", -7307);
898 DOTEST(1024, "-12 ", 5, "%-5d", -12);
899 DOTEST(1024, "-00012", 6, "%-.5d", -12);
|
711
| 900
|
712static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c)
713{
714 if (*currlen < maxlen)
715 buffer[(*currlen)++] = c;
716}
| 901 /* test + and space flags */
902 DOTEST(1024, "+12", 3, "%+d", 12);
903 DOTEST(1024, " 12", 3, "% d", 12);
|
717
| 904
|
718#ifdef TEST_SNPRINTF
719#ifndef LONG_STRING
720#define LONG_STRING 1024
721#endif
722int main (void)
723{
724 char buf1[LONG_STRING];
725 char buf2[LONG_STRING];
726 char *fp_fmt[] = {
727 "%-1.5f",
728 "%1.5f",
729 "%123.9f",
730 "%10.5f",
731 "% 10.5f",
732 "%+22.9f",
733 "%+4.9f",
734 "%01.3f",
735 "%4f",
736 "%3.1f",
737 "%3.2f",
738 NULL
739 };
740 double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
741 0.9996, 1.996, 4.136, 0};
742 char *int_fmt[] = {
743 "%-1.5d",
744 "%1.5d",
745 "%123.9d",
746 "%5.5d",
747 "%10.5d",
748 "% 10.5d",
749 "%+22.33d",
750 "%01.3d",
751 "%4d",
752 NULL
753 };
754 long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
755 int x, y;
756 int fail = 0;
757 int num = 0;
| 905 /* test %u */
906 DOTEST(1024, "12", 2, "%u", 12);
907 DOTEST(1024, "0", 1, "%u", 0);
908 DOTEST(1024, "4294967295", 10, "%u", 0xffffffff);
|
758
| 909
|
759 printf ("Testing snprintf format codes against system sprintf...\n");
| 910 /* test %x */
911 DOTEST(1024, "0", 1, "%x", 0);
912 DOTEST(1024, "c", 1, "%x", 12);
913 DOTEST(1024, "12ab34cd", 8, "%x", 0x12ab34cd);
|
760
| 914
|
761 for (x = 0; fp_fmt[x] != NULL ; x++)
762 for (y = 0; fp_nums[y] != 0 ; y++)
763 {
764 snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
765 sprintf (buf2, fp_fmt[x], fp_nums[y]);
766 if (strcmp (buf1, buf2))
767 {
768 printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n",
769 fp_fmt[x], buf1, buf2);
770 fail++;
771 }
772 num++;
773 }
| 915 /* test %llu, %lld */
916 DOTEST(1024, "18446744073709551615", 20, "%llu",
917 (long long)0xffffffffffffffff);
918 DOTEST(1024, "-9223372036854775808", 20, "%lld",
919 (long long)0x8000000000000000);
920 DOTEST(1024, "9223372036854775808", 19, "%llu",
921 (long long)0x8000000000000000);
|
774
| 922
|
775 for (x = 0; int_fmt[x] != NULL ; x++)
776 for (y = 0; int_nums[y] != 0 ; y++)
777 {
778 snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
779 sprintf (buf2, int_fmt[x], int_nums[y]);
780 if (strcmp (buf1, buf2))
781 {
782 printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n",
783 int_fmt[x], buf1, buf2);
784 fail++;
785 }
786 num++;
787 }
788 printf ("%d tests failed out of %d.\n", fail, num);
| 923 /* test %s */
924 DOTEST(1024, "hello", 5, "%s", "hello");
925 DOTEST(1024, " hello", 10, "%10s", "hello");
926 DOTEST(1024, "hello ", 10, "%-10s", "hello");
927 DOTEST(1024, "he", 2, "%.2s", "hello");
928 DOTEST(1024, " he", 4, "%4.2s", "hello");
929 DOTEST(1024, " h", 4, "%4.2s", "h");
930
931 /* test %c */
932 DOTEST(1024, "a", 1, "%c", 'a');
933 /* warning from gcc for format string, but it does work
934 DOTEST(1024, " a", 5, "%5c", 'a');
935 DOTEST(1024, "a", 1, "%.0c", 'a'); */
936
937 /* test %n */
938 DOTEST(1024, "hello", 5, "hello%n", &x);
939 if(x != 5) { printf("the %%n failed\n"); exit(1); }
940
941 /* test %m */
942 errno = 0;
943 DOTEST(1024, "Success", 7, "%m");
944
945 /* test %p */
946 DOTEST(1024, "0x10", 4, "%p", (void*)0x10);
947 DOTEST(1024, "(nil)", 5, "%p", (void*)0x0);
948
949 /* test %% */
950 DOTEST(1024, "%", 1, "%%");
951
952 /* test %f */
953 DOTEST(1024, "0.000000", 8, "%f", 0.0);
954 DOTEST(1024, "0.00", 4, "%.2f", 0.0);
955 /* differs, "-0.00" DOTEST(1024, "0.00", 4, "%.2f", -0.0); */
956 DOTEST(1024, "234.00", 6, "%.2f", 234.005);
957 DOTEST(1024, "8973497.1246", 12, "%.4f", 8973497.12456);
958 DOTEST(1024, "-12.000000", 10, "%f", -12.0);
959 DOTEST(1024, "6", 1, "%.0f", 6.0);
960
961 DOTEST(1024, "6", 1, "%g", 6.0);
962 DOTEST(1024, "6.1", 3, "%g", 6.1);
963 DOTEST(1024, "6.15", 4, "%g", 6.15);
964
965 /* These format strings are from the code of NSD, Unbound, ldns */
966
967 DOTEST(1024, "abcdef", 6, "%s", "abcdef");
968 DOTEST(1024, "005", 3, "%03u", 5);
969 DOTEST(1024, "12345", 5, "%03u", 12345);
970 DOTEST(1024, "5", 1, "%d", 5);
971 DOTEST(1024, "(nil)", 5, "%p", NULL);
972 DOTEST(1024, "12345", 5, "%ld", (long)12345);
973 DOTEST(1024, "12345", 5, "%lu", (long)12345);
974 DOTEST(1024, " 12345", 12, "%12u", (unsigned)12345);
975 DOTEST(1024, "12345", 5, "%u", (unsigned)12345);
976 DOTEST(1024, "12345", 5, "%llu", (unsigned long long)12345);
977 DOTEST(1024, "12345", 5, "%x", 0x12345);
978 DOTEST(1024, "12345", 5, "%llx", (long long)0x12345);
979 DOTEST(1024, "012345", 6, "%6.6d", 12345);
980 DOTEST(1024, "012345", 6, "%6.6u", 12345);
981 DOTEST(1024, "1234.54", 7, "%g", 1234.54);
982 DOTEST(1024, "123456789.54", 12, "%.12g", 123456789.54);
983 DOTEST(1024, "3456789123456.54", 16, "%.16g", 3456789123456.54);
984 /* %24g does not work with 24 digits, not enough accuracy,
985 * the first 16 digits are correct */
986 DOTEST(1024, "12345", 5, "%3.3d", 12345);
987 DOTEST(1024, "000", 3, "%3.3d", 0);
988 DOTEST(1024, "001", 3, "%3.3d", 1);
989 DOTEST(1024, "012", 3, "%3.3d", 12);
990 DOTEST(1024, "-012", 4, "%3.3d", -12);
991 DOTEST(1024, "he", 2, "%.2s", "hello");
992 DOTEST(1024, "helloworld", 10, "%s%s", "hello", "world");
993 DOTEST(1024, "he", 2, "%.*s", 2, "hello");
994 DOTEST(1024, " hello", 7, "%*s", 7, "hello");
995 DOTEST(1024, "hello ", 7, "%*s", -7, "hello");
996 DOTEST(1024, "0", 1, "%c", '0');
997 DOTEST(1024, "A", 1, "%c", 'A');
998 DOTEST(1024, "", 1, "%c", 0);
999 DOTEST(1024, "\010", 1, "%c", 8);
1000 DOTEST(1024, "%", 1, "%%");
1001 DOTEST(1024, "0a", 2, "%02x", 0x0a);
1002 DOTEST(1024, "bd", 2, "%02x", 0xbd);
1003 DOTEST(1024, "12", 2, "%02ld", (long)12);
1004 DOTEST(1024, "02", 2, "%02ld", (long)2);
1005 DOTEST(1024, "02", 2, "%02u", (unsigned)2);
1006 DOTEST(1024, "765432", 6, "%05u", (unsigned)765432);
1007 DOTEST(1024, "10.234", 6, "%0.3f", 10.23421);
1008 DOTEST(1024, "123456.234", 10, "%0.3f", 123456.23421);
1009 DOTEST(1024, "123456789.234", 13, "%0.3f", 123456789.23421);
1010 DOTEST(1024, "123456.23", 9, "%.2f", 123456.23421);
1011 DOTEST(1024, "123456", 6, "%.0f", 123456.23421);
1012 DOTEST(1024, "0123", 4, "%.4x", 0x0123);
1013 DOTEST(1024, "00000123", 8, "%.8x", 0x0123);
1014 DOTEST(1024, "ffeb0cde", 8, "%.8x", 0xffeb0cde);
1015 DOTEST(1024, " 987654321", 10, "%10lu", (unsigned long)987654321);
1016 DOTEST(1024, " 987654321", 12, "%12lu", (unsigned long)987654321);
1017 DOTEST(1024, "987654321", 9, "%i", 987654321);
1018 DOTEST(1024, "-87654321", 9, "%i", -87654321);
1019 DOTEST(1024, "hello ", 16, "%-16s", "hello");
1020 DOTEST(1024, " ", 16, "%-16s", "");
1021 DOTEST(1024, "a ", 16, "%-16s", "a");
1022 DOTEST(1024, "foobarfoobar ", 16, "%-16s", "foobarfoobar");
1023 DOTEST(1024, "foobarfoobarfoobar", 18, "%-16s", "foobarfoobarfoobar");
1024
1025 /* combined expressions */
1026 DOTEST(1024, "foo 1.0 size 512 edns", 21,
1027 "foo %s size %d %s%s", "1.0", 512, "", "edns");
1028 DOTEST(15, "foo 1.0 size 5", 21,
1029 "foo %s size %d %s%s", "1.0", 512, "", "edns");
1030 DOTEST(1024, "packet 1203ceff id", 18,
1031 "packet %2.2x%2.2x%2.2x%2.2x id", 0x12, 0x03, 0xce, 0xff);
1032 DOTEST(1024, "/tmp/testbound_123abcd.tmp", 26, "/tmp/testbound_%u%s%s.tmp", 123, "ab", "cd");
1033
1034 return 0;
|
789}
790#endif /* SNPRINTF_TEST */
| 1035}
1036#endif /* SNPRINTF_TEST */
|
791
792#endif /* !HAVE_SNPRINTF */
| |
| |