1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 1999 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al. |
9 | * |
10 | * This software is licensed as described in the file COPYING, which |
11 | * you should have received as part of this distribution. The terms |
12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
13 | * |
14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
15 | * copies of the Software, and permit persons to whom the Software is |
16 | * furnished to do so, under the terms of the COPYING file. |
17 | * |
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
19 | * KIND, either express or implied. |
20 | * |
21 | * |
22 | * Purpose: |
23 | * A merge of Bjorn Reese's format() function and Daniel's dsprintf() |
24 | * 1.0. A full blooded printf() clone with full support for <num>$ |
25 | * everywhere (parameters, widths and precisions) including variabled |
26 | * sized parameters (like doubles, long longs, long doubles and even |
27 | * void * in 64-bit architectures). |
28 | * |
29 | * Current restrictions: |
30 | * - Max 128 parameters |
31 | * - No 'long double' support. |
32 | * |
33 | * If you ever want truly portable and good *printf() clones, the project that |
34 | * took on from here is named 'Trio' and you find more details on the trio web |
35 | * page at https://daniel.haxx.se/projects/trio/ |
36 | */ |
37 | |
38 | #include "curl_setup.h" |
39 | #include <curl/mprintf.h> |
40 | |
41 | #include "curl_memory.h" |
42 | /* The last #include file should be: */ |
43 | #include "memdebug.h" |
44 | |
45 | /* |
46 | * If SIZEOF_SIZE_T has not been defined, default to the size of long. |
47 | */ |
48 | |
49 | #ifdef HAVE_LONGLONG |
50 | # define LONG_LONG_TYPE long long |
51 | # define HAVE_LONG_LONG_TYPE |
52 | #else |
53 | # if defined(_MSC_VER) && (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64) |
54 | # define LONG_LONG_TYPE __int64 |
55 | # define HAVE_LONG_LONG_TYPE |
56 | # else |
57 | # undef LONG_LONG_TYPE |
58 | # undef HAVE_LONG_LONG_TYPE |
59 | # endif |
60 | #endif |
61 | |
62 | /* |
63 | * Non-ANSI integer extensions |
64 | */ |
65 | |
66 | #if (defined(__BORLANDC__) && (__BORLANDC__ >= 0x520)) || \ |
67 | (defined(__WATCOMC__) && defined(__386__)) || \ |
68 | (defined(__POCC__) && defined(_MSC_VER)) || \ |
69 | (defined(_WIN32_WCE)) || \ |
70 | (defined(__MINGW32__)) || \ |
71 | (defined(_MSC_VER) && (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64)) |
72 | # define MP_HAVE_INT_EXTENSIONS |
73 | #endif |
74 | |
75 | /* |
76 | * Max integer data types that mprintf.c is capable |
77 | */ |
78 | |
79 | #ifdef HAVE_LONG_LONG_TYPE |
80 | # define mp_intmax_t LONG_LONG_TYPE |
81 | # define mp_uintmax_t unsigned LONG_LONG_TYPE |
82 | #else |
83 | # define mp_intmax_t long |
84 | # define mp_uintmax_t unsigned long |
85 | #endif |
86 | |
87 | #define BUFFSIZE 326 /* buffer for long-to-str and float-to-str calcs, should |
88 | fit negative DBL_MAX (317 letters) */ |
89 | #define MAX_PARAMETERS 128 /* lame static limit */ |
90 | |
91 | #ifdef __AMIGA__ |
92 | # undef FORMAT_INT |
93 | #endif |
94 | |
95 | /* Lower-case digits. */ |
96 | static const char lower_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz" ; |
97 | |
98 | /* Upper-case digits. */ |
99 | static const char upper_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" ; |
100 | |
101 | #define OUTCHAR(x) \ |
102 | do{ \ |
103 | if(stream((unsigned char)(x), (FILE *)data) != -1) \ |
104 | done++; \ |
105 | else \ |
106 | return done; /* return immediately on failure */ \ |
107 | } while(0) |
108 | |
109 | /* Data type to read from the arglist */ |
110 | typedef enum { |
111 | FORMAT_UNKNOWN = 0, |
112 | FORMAT_STRING, |
113 | FORMAT_PTR, |
114 | FORMAT_INT, |
115 | FORMAT_INTPTR, |
116 | FORMAT_LONG, |
117 | FORMAT_LONGLONG, |
118 | FORMAT_DOUBLE, |
119 | FORMAT_LONGDOUBLE, |
120 | FORMAT_WIDTH /* For internal use */ |
121 | } FormatType; |
122 | |
123 | /* conversion and display flags */ |
124 | enum { |
125 | FLAGS_NEW = 0, |
126 | FLAGS_SPACE = 1<<0, |
127 | FLAGS_SHOWSIGN = 1<<1, |
128 | FLAGS_LEFT = 1<<2, |
129 | FLAGS_ALT = 1<<3, |
130 | FLAGS_SHORT = 1<<4, |
131 | FLAGS_LONG = 1<<5, |
132 | FLAGS_LONGLONG = 1<<6, |
133 | FLAGS_LONGDOUBLE = 1<<7, |
134 | FLAGS_PAD_NIL = 1<<8, |
135 | FLAGS_UNSIGNED = 1<<9, |
136 | FLAGS_OCTAL = 1<<10, |
137 | FLAGS_HEX = 1<<11, |
138 | FLAGS_UPPER = 1<<12, |
139 | FLAGS_WIDTH = 1<<13, /* '*' or '*<num>$' used */ |
140 | FLAGS_WIDTHPARAM = 1<<14, /* width PARAMETER was specified */ |
141 | FLAGS_PREC = 1<<15, /* precision was specified */ |
142 | FLAGS_PRECPARAM = 1<<16, /* precision PARAMETER was specified */ |
143 | FLAGS_CHAR = 1<<17, /* %c story */ |
144 | FLAGS_FLOATE = 1<<18, /* %e or %E */ |
145 | FLAGS_FLOATG = 1<<19 /* %g or %G */ |
146 | }; |
147 | |
148 | typedef struct { |
149 | FormatType type; |
150 | int flags; |
151 | long width; /* width OR width parameter number */ |
152 | long precision; /* precision OR precision parameter number */ |
153 | union { |
154 | char *str; |
155 | void *ptr; |
156 | union { |
157 | mp_intmax_t as_signed; |
158 | mp_uintmax_t as_unsigned; |
159 | } num; |
160 | double dnum; |
161 | } data; |
162 | } va_stack_t; |
163 | |
164 | struct nsprintf { |
165 | char *buffer; |
166 | size_t length; |
167 | size_t max; |
168 | }; |
169 | |
170 | struct asprintf { |
171 | char *buffer; /* allocated buffer */ |
172 | size_t len; /* length of string */ |
173 | size_t alloc; /* length of alloc */ |
174 | int fail; /* (!= 0) if an alloc has failed and thus |
175 | the output is not the complete data */ |
176 | }; |
177 | |
178 | static long dprintf_DollarString(char *input, char **end) |
179 | { |
180 | int number = 0; |
181 | while(ISDIGIT(*input)) { |
182 | number *= 10; |
183 | number += *input-'0'; |
184 | input++; |
185 | } |
186 | if(number && ('$'==*input++)) { |
187 | *end = input; |
188 | return number; |
189 | } |
190 | return 0; |
191 | } |
192 | |
193 | static bool dprintf_IsQualifierNoDollar(const char *fmt) |
194 | { |
195 | #if defined(MP_HAVE_INT_EXTENSIONS) |
196 | if(!strncmp(fmt, "I32" , 3) || !strncmp(fmt, "I64" , 3)) { |
197 | return TRUE; |
198 | } |
199 | #endif |
200 | |
201 | switch(*fmt) { |
202 | case '-': case '+': case ' ': case '#': case '.': |
203 | case '0': case '1': case '2': case '3': case '4': |
204 | case '5': case '6': case '7': case '8': case '9': |
205 | case 'h': case 'l': case 'L': case 'z': case 'q': |
206 | case '*': case 'O': |
207 | #if defined(MP_HAVE_INT_EXTENSIONS) |
208 | case 'I': |
209 | #endif |
210 | return TRUE; |
211 | |
212 | default: |
213 | return FALSE; |
214 | } |
215 | } |
216 | |
217 | /****************************************************************** |
218 | * |
219 | * Pass 1: |
220 | * Create an index with the type of each parameter entry and its |
221 | * value (may vary in size) |
222 | * |
223 | * Returns zero on success. |
224 | * |
225 | ******************************************************************/ |
226 | |
227 | static int dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos, |
228 | va_list arglist) |
229 | { |
230 | char *fmt = (char *)format; |
231 | int param_num = 0; |
232 | long this_param; |
233 | long width; |
234 | long precision; |
235 | int flags; |
236 | long max_param = 0; |
237 | long i; |
238 | |
239 | while(*fmt) { |
240 | if(*fmt++ == '%') { |
241 | if(*fmt == '%') { |
242 | fmt++; |
243 | continue; /* while */ |
244 | } |
245 | |
246 | flags = FLAGS_NEW; |
247 | |
248 | /* Handle the positional case (N$) */ |
249 | |
250 | param_num++; |
251 | |
252 | this_param = dprintf_DollarString(fmt, &fmt); |
253 | if(0 == this_param) |
254 | /* we got no positional, get the next counter */ |
255 | this_param = param_num; |
256 | |
257 | if(this_param > max_param) |
258 | max_param = this_param; |
259 | |
260 | /* |
261 | * The parameter with number 'i' should be used. Next, we need |
262 | * to get SIZE and TYPE of the parameter. Add the information |
263 | * to our array. |
264 | */ |
265 | |
266 | width = 0; |
267 | precision = 0; |
268 | |
269 | /* Handle the flags */ |
270 | |
271 | while(dprintf_IsQualifierNoDollar(fmt)) { |
272 | #if defined(MP_HAVE_INT_EXTENSIONS) |
273 | if(!strncmp(fmt, "I32" , 3)) { |
274 | flags |= FLAGS_LONG; |
275 | fmt += 3; |
276 | } |
277 | else if(!strncmp(fmt, "I64" , 3)) { |
278 | flags |= FLAGS_LONGLONG; |
279 | fmt += 3; |
280 | } |
281 | else |
282 | #endif |
283 | |
284 | switch(*fmt++) { |
285 | case ' ': |
286 | flags |= FLAGS_SPACE; |
287 | break; |
288 | case '+': |
289 | flags |= FLAGS_SHOWSIGN; |
290 | break; |
291 | case '-': |
292 | flags |= FLAGS_LEFT; |
293 | flags &= ~FLAGS_PAD_NIL; |
294 | break; |
295 | case '#': |
296 | flags |= FLAGS_ALT; |
297 | break; |
298 | case '.': |
299 | if('*' == *fmt) { |
300 | /* The precision is picked from a specified parameter */ |
301 | |
302 | flags |= FLAGS_PRECPARAM; |
303 | fmt++; |
304 | param_num++; |
305 | |
306 | i = dprintf_DollarString(fmt, &fmt); |
307 | if(i) |
308 | precision = i; |
309 | else |
310 | precision = param_num; |
311 | |
312 | if(precision > max_param) |
313 | max_param = precision; |
314 | } |
315 | else { |
316 | flags |= FLAGS_PREC; |
317 | precision = strtol(fmt, &fmt, 10); |
318 | } |
319 | break; |
320 | case 'h': |
321 | flags |= FLAGS_SHORT; |
322 | break; |
323 | #if defined(MP_HAVE_INT_EXTENSIONS) |
324 | case 'I': |
325 | #if (SIZEOF_CURL_OFF_T > SIZEOF_LONG) |
326 | flags |= FLAGS_LONGLONG; |
327 | #else |
328 | flags |= FLAGS_LONG; |
329 | #endif |
330 | break; |
331 | #endif |
332 | case 'l': |
333 | if(flags & FLAGS_LONG) |
334 | flags |= FLAGS_LONGLONG; |
335 | else |
336 | flags |= FLAGS_LONG; |
337 | break; |
338 | case 'L': |
339 | flags |= FLAGS_LONGDOUBLE; |
340 | break; |
341 | case 'q': |
342 | flags |= FLAGS_LONGLONG; |
343 | break; |
344 | case 'z': |
345 | /* the code below generates a warning if -Wunreachable-code is |
346 | used */ |
347 | #if (SIZEOF_SIZE_T > SIZEOF_LONG) |
348 | flags |= FLAGS_LONGLONG; |
349 | #else |
350 | flags |= FLAGS_LONG; |
351 | #endif |
352 | break; |
353 | case 'O': |
354 | #if (SIZEOF_CURL_OFF_T > SIZEOF_LONG) |
355 | flags |= FLAGS_LONGLONG; |
356 | #else |
357 | flags |= FLAGS_LONG; |
358 | #endif |
359 | break; |
360 | case '0': |
361 | if(!(flags & FLAGS_LEFT)) |
362 | flags |= FLAGS_PAD_NIL; |
363 | /* FALLTHROUGH */ |
364 | case '1': case '2': case '3': case '4': |
365 | case '5': case '6': case '7': case '8': case '9': |
366 | flags |= FLAGS_WIDTH; |
367 | width = strtol(fmt-1, &fmt, 10); |
368 | break; |
369 | case '*': /* Special case */ |
370 | flags |= FLAGS_WIDTHPARAM; |
371 | param_num++; |
372 | |
373 | i = dprintf_DollarString(fmt, &fmt); |
374 | if(i) |
375 | width = i; |
376 | else |
377 | width = param_num; |
378 | if(width > max_param) |
379 | max_param = width; |
380 | break; |
381 | default: |
382 | break; |
383 | } |
384 | } /* switch */ |
385 | |
386 | /* Handle the specifier */ |
387 | |
388 | i = this_param - 1; |
389 | |
390 | if((i < 0) || (i >= MAX_PARAMETERS)) |
391 | /* out of allowed range */ |
392 | return 1; |
393 | |
394 | switch (*fmt) { |
395 | case 'S': |
396 | flags |= FLAGS_ALT; |
397 | /* FALLTHROUGH */ |
398 | case 's': |
399 | vto[i].type = FORMAT_STRING; |
400 | break; |
401 | case 'n': |
402 | vto[i].type = FORMAT_INTPTR; |
403 | break; |
404 | case 'p': |
405 | vto[i].type = FORMAT_PTR; |
406 | break; |
407 | case 'd': case 'i': |
408 | vto[i].type = FORMAT_INT; |
409 | break; |
410 | case 'u': |
411 | vto[i].type = FORMAT_INT; |
412 | flags |= FLAGS_UNSIGNED; |
413 | break; |
414 | case 'o': |
415 | vto[i].type = FORMAT_INT; |
416 | flags |= FLAGS_OCTAL; |
417 | break; |
418 | case 'x': |
419 | vto[i].type = FORMAT_INT; |
420 | flags |= FLAGS_HEX|FLAGS_UNSIGNED; |
421 | break; |
422 | case 'X': |
423 | vto[i].type = FORMAT_INT; |
424 | flags |= FLAGS_HEX|FLAGS_UPPER|FLAGS_UNSIGNED; |
425 | break; |
426 | case 'c': |
427 | vto[i].type = FORMAT_INT; |
428 | flags |= FLAGS_CHAR; |
429 | break; |
430 | case 'f': |
431 | vto[i].type = FORMAT_DOUBLE; |
432 | break; |
433 | case 'e': |
434 | vto[i].type = FORMAT_DOUBLE; |
435 | flags |= FLAGS_FLOATE; |
436 | break; |
437 | case 'E': |
438 | vto[i].type = FORMAT_DOUBLE; |
439 | flags |= FLAGS_FLOATE|FLAGS_UPPER; |
440 | break; |
441 | case 'g': |
442 | vto[i].type = FORMAT_DOUBLE; |
443 | flags |= FLAGS_FLOATG; |
444 | break; |
445 | case 'G': |
446 | vto[i].type = FORMAT_DOUBLE; |
447 | flags |= FLAGS_FLOATG|FLAGS_UPPER; |
448 | break; |
449 | default: |
450 | vto[i].type = FORMAT_UNKNOWN; |
451 | break; |
452 | } /* switch */ |
453 | |
454 | vto[i].flags = flags; |
455 | vto[i].width = width; |
456 | vto[i].precision = precision; |
457 | |
458 | if(flags & FLAGS_WIDTHPARAM) { |
459 | /* we have the width specified from a parameter, so we make that |
460 | parameter's info setup properly */ |
461 | long k = width - 1; |
462 | vto[i].width = k; |
463 | vto[k].type = FORMAT_WIDTH; |
464 | vto[k].flags = FLAGS_NEW; |
465 | /* can't use width or precision of width! */ |
466 | vto[k].width = 0; |
467 | vto[k].precision = 0; |
468 | } |
469 | if(flags & FLAGS_PRECPARAM) { |
470 | /* we have the precision specified from a parameter, so we make that |
471 | parameter's info setup properly */ |
472 | long k = precision - 1; |
473 | vto[i].precision = k; |
474 | vto[k].type = FORMAT_WIDTH; |
475 | vto[k].flags = FLAGS_NEW; |
476 | /* can't use width or precision of width! */ |
477 | vto[k].width = 0; |
478 | vto[k].precision = 0; |
479 | } |
480 | *endpos++ = fmt + 1; /* end of this sequence */ |
481 | } |
482 | } |
483 | |
484 | /* Read the arg list parameters into our data list */ |
485 | for(i = 0; i<max_param; i++) { |
486 | /* Width/precision arguments must be read before the main argument |
487 | they are attached to */ |
488 | if(vto[i].flags & FLAGS_WIDTHPARAM) { |
489 | vto[vto[i].width].data.num.as_signed = |
490 | (mp_intmax_t)va_arg(arglist, int); |
491 | } |
492 | if(vto[i].flags & FLAGS_PRECPARAM) { |
493 | vto[vto[i].precision].data.num.as_signed = |
494 | (mp_intmax_t)va_arg(arglist, int); |
495 | } |
496 | |
497 | switch(vto[i].type) { |
498 | case FORMAT_STRING: |
499 | vto[i].data.str = va_arg(arglist, char *); |
500 | break; |
501 | |
502 | case FORMAT_INTPTR: |
503 | case FORMAT_UNKNOWN: |
504 | case FORMAT_PTR: |
505 | vto[i].data.ptr = va_arg(arglist, void *); |
506 | break; |
507 | |
508 | case FORMAT_INT: |
509 | #ifdef HAVE_LONG_LONG_TYPE |
510 | if((vto[i].flags & FLAGS_LONGLONG) && (vto[i].flags & FLAGS_UNSIGNED)) |
511 | vto[i].data.num.as_unsigned = |
512 | (mp_uintmax_t)va_arg(arglist, mp_uintmax_t); |
513 | else if(vto[i].flags & FLAGS_LONGLONG) |
514 | vto[i].data.num.as_signed = |
515 | (mp_intmax_t)va_arg(arglist, mp_intmax_t); |
516 | else |
517 | #endif |
518 | { |
519 | if((vto[i].flags & FLAGS_LONG) && (vto[i].flags & FLAGS_UNSIGNED)) |
520 | vto[i].data.num.as_unsigned = |
521 | (mp_uintmax_t)va_arg(arglist, unsigned long); |
522 | else if(vto[i].flags & FLAGS_LONG) |
523 | vto[i].data.num.as_signed = |
524 | (mp_intmax_t)va_arg(arglist, long); |
525 | else if(vto[i].flags & FLAGS_UNSIGNED) |
526 | vto[i].data.num.as_unsigned = |
527 | (mp_uintmax_t)va_arg(arglist, unsigned int); |
528 | else |
529 | vto[i].data.num.as_signed = |
530 | (mp_intmax_t)va_arg(arglist, int); |
531 | } |
532 | break; |
533 | |
534 | case FORMAT_DOUBLE: |
535 | vto[i].data.dnum = va_arg(arglist, double); |
536 | break; |
537 | |
538 | case FORMAT_WIDTH: |
539 | /* Argument has been read. Silently convert it into an integer |
540 | * for later use |
541 | */ |
542 | vto[i].type = FORMAT_INT; |
543 | break; |
544 | |
545 | default: |
546 | break; |
547 | } |
548 | } |
549 | |
550 | return 0; |
551 | |
552 | } |
553 | |
554 | static int dprintf_formatf( |
555 | void *data, /* untouched by format(), just sent to the stream() function in |
556 | the second argument */ |
557 | /* function pointer called for each output character */ |
558 | int (*stream)(int, FILE *), |
559 | const char *format, /* %-formatted string */ |
560 | va_list ap_save) /* list of parameters */ |
561 | { |
562 | /* Base-36 digits for numbers. */ |
563 | const char *digits = lower_digits; |
564 | |
565 | /* Pointer into the format string. */ |
566 | char *f; |
567 | |
568 | /* Number of characters written. */ |
569 | int done = 0; |
570 | |
571 | long param; /* current parameter to read */ |
572 | long param_num = 0; /* parameter counter */ |
573 | |
574 | va_stack_t vto[MAX_PARAMETERS]; |
575 | char *endpos[MAX_PARAMETERS]; |
576 | char **end; |
577 | |
578 | char work[BUFFSIZE]; |
579 | |
580 | va_stack_t *p; |
581 | |
582 | /* 'workend' points to the final buffer byte position, but with an extra |
583 | byte as margin to avoid the (false?) warning Coverity gives us |
584 | otherwise */ |
585 | char *workend = &work[sizeof(work) - 2]; |
586 | |
587 | /* Do the actual %-code parsing */ |
588 | if(dprintf_Pass1(format, vto, endpos, ap_save)) |
589 | return -1; |
590 | |
591 | end = &endpos[0]; /* the initial end-position from the list dprintf_Pass1() |
592 | created for us */ |
593 | |
594 | f = (char *)format; |
595 | while(*f != '\0') { |
596 | /* Format spec modifiers. */ |
597 | int is_alt; |
598 | |
599 | /* Width of a field. */ |
600 | long width; |
601 | |
602 | /* Precision of a field. */ |
603 | long prec; |
604 | |
605 | /* Decimal integer is negative. */ |
606 | int is_neg; |
607 | |
608 | /* Base of a number to be written. */ |
609 | unsigned long base; |
610 | |
611 | /* Integral values to be written. */ |
612 | mp_uintmax_t num; |
613 | |
614 | /* Used to convert negative in positive. */ |
615 | mp_intmax_t signed_num; |
616 | |
617 | char *w; |
618 | |
619 | if(*f != '%') { |
620 | /* This isn't a format spec, so write everything out until the next one |
621 | OR end of string is reached. */ |
622 | do { |
623 | OUTCHAR(*f); |
624 | } while(*++f && ('%' != *f)); |
625 | continue; |
626 | } |
627 | |
628 | ++f; |
629 | |
630 | /* Check for "%%". Note that although the ANSI standard lists |
631 | '%' as a conversion specifier, it says "The complete format |
632 | specification shall be `%%'," so we can avoid all the width |
633 | and precision processing. */ |
634 | if(*f == '%') { |
635 | ++f; |
636 | OUTCHAR('%'); |
637 | continue; |
638 | } |
639 | |
640 | /* If this is a positional parameter, the position must follow immediately |
641 | after the %, thus create a %<num>$ sequence */ |
642 | param = dprintf_DollarString(f, &f); |
643 | |
644 | if(!param) |
645 | param = param_num; |
646 | else |
647 | --param; |
648 | |
649 | param_num++; /* increase this always to allow "%2$s %1$s %s" and then the |
650 | third %s will pick the 3rd argument */ |
651 | |
652 | p = &vto[param]; |
653 | |
654 | /* pick up the specified width */ |
655 | if(p->flags & FLAGS_WIDTHPARAM) { |
656 | width = (long)vto[p->width].data.num.as_signed; |
657 | param_num++; /* since the width is extracted from a parameter, we |
658 | must skip that to get to the next one properly */ |
659 | if(width < 0) { |
660 | /* "A negative field width is taken as a '-' flag followed by a |
661 | positive field width." */ |
662 | width = -width; |
663 | p->flags |= FLAGS_LEFT; |
664 | p->flags &= ~FLAGS_PAD_NIL; |
665 | } |
666 | } |
667 | else |
668 | width = p->width; |
669 | |
670 | /* pick up the specified precision */ |
671 | if(p->flags & FLAGS_PRECPARAM) { |
672 | prec = (long)vto[p->precision].data.num.as_signed; |
673 | param_num++; /* since the precision is extracted from a parameter, we |
674 | must skip that to get to the next one properly */ |
675 | if(prec < 0) |
676 | /* "A negative precision is taken as if the precision were |
677 | omitted." */ |
678 | prec = -1; |
679 | } |
680 | else if(p->flags & FLAGS_PREC) |
681 | prec = p->precision; |
682 | else |
683 | prec = -1; |
684 | |
685 | is_alt = (p->flags & FLAGS_ALT) ? 1 : 0; |
686 | |
687 | switch(p->type) { |
688 | case FORMAT_INT: |
689 | num = p->data.num.as_unsigned; |
690 | if(p->flags & FLAGS_CHAR) { |
691 | /* Character. */ |
692 | if(!(p->flags & FLAGS_LEFT)) |
693 | while(--width > 0) |
694 | OUTCHAR(' '); |
695 | OUTCHAR((char) num); |
696 | if(p->flags & FLAGS_LEFT) |
697 | while(--width > 0) |
698 | OUTCHAR(' '); |
699 | break; |
700 | } |
701 | if(p->flags & FLAGS_OCTAL) { |
702 | /* Octal unsigned integer. */ |
703 | base = 8; |
704 | goto unsigned_number; |
705 | } |
706 | else if(p->flags & FLAGS_HEX) { |
707 | /* Hexadecimal unsigned integer. */ |
708 | |
709 | digits = (p->flags & FLAGS_UPPER)? upper_digits : lower_digits; |
710 | base = 16; |
711 | goto unsigned_number; |
712 | } |
713 | else if(p->flags & FLAGS_UNSIGNED) { |
714 | /* Decimal unsigned integer. */ |
715 | base = 10; |
716 | goto unsigned_number; |
717 | } |
718 | |
719 | /* Decimal integer. */ |
720 | base = 10; |
721 | |
722 | is_neg = (p->data.num.as_signed < (mp_intmax_t)0) ? 1 : 0; |
723 | if(is_neg) { |
724 | /* signed_num might fail to hold absolute negative minimum by 1 */ |
725 | signed_num = p->data.num.as_signed + (mp_intmax_t)1; |
726 | signed_num = -signed_num; |
727 | num = (mp_uintmax_t)signed_num; |
728 | num += (mp_uintmax_t)1; |
729 | } |
730 | |
731 | goto number; |
732 | |
733 | unsigned_number: |
734 | /* Unsigned number of base BASE. */ |
735 | is_neg = 0; |
736 | |
737 | number: |
738 | /* Number of base BASE. */ |
739 | |
740 | /* Supply a default precision if none was given. */ |
741 | if(prec == -1) |
742 | prec = 1; |
743 | |
744 | /* Put the number in WORK. */ |
745 | w = workend; |
746 | while(num > 0) { |
747 | *w-- = digits[num % base]; |
748 | num /= base; |
749 | } |
750 | width -= (long)(workend - w); |
751 | prec -= (long)(workend - w); |
752 | |
753 | if(is_alt && base == 8 && prec <= 0) { |
754 | *w-- = '0'; |
755 | --width; |
756 | } |
757 | |
758 | if(prec > 0) { |
759 | width -= prec; |
760 | while(prec-- > 0) |
761 | *w-- = '0'; |
762 | } |
763 | |
764 | if(is_alt && base == 16) |
765 | width -= 2; |
766 | |
767 | if(is_neg || (p->flags & FLAGS_SHOWSIGN) || (p->flags & FLAGS_SPACE)) |
768 | --width; |
769 | |
770 | if(!(p->flags & FLAGS_LEFT) && !(p->flags & FLAGS_PAD_NIL)) |
771 | while(width-- > 0) |
772 | OUTCHAR(' '); |
773 | |
774 | if(is_neg) |
775 | OUTCHAR('-'); |
776 | else if(p->flags & FLAGS_SHOWSIGN) |
777 | OUTCHAR('+'); |
778 | else if(p->flags & FLAGS_SPACE) |
779 | OUTCHAR(' '); |
780 | |
781 | if(is_alt && base == 16) { |
782 | OUTCHAR('0'); |
783 | if(p->flags & FLAGS_UPPER) |
784 | OUTCHAR('X'); |
785 | else |
786 | OUTCHAR('x'); |
787 | } |
788 | |
789 | if(!(p->flags & FLAGS_LEFT) && (p->flags & FLAGS_PAD_NIL)) |
790 | while(width-- > 0) |
791 | OUTCHAR('0'); |
792 | |
793 | /* Write the number. */ |
794 | while(++w <= workend) { |
795 | OUTCHAR(*w); |
796 | } |
797 | |
798 | if(p->flags & FLAGS_LEFT) |
799 | while(width-- > 0) |
800 | OUTCHAR(' '); |
801 | break; |
802 | |
803 | case FORMAT_STRING: |
804 | /* String. */ |
805 | { |
806 | static const char null[] = "(nil)" ; |
807 | const char *str; |
808 | size_t len; |
809 | |
810 | str = (char *) p->data.str; |
811 | if(str == NULL) { |
812 | /* Write null[] if there's space. */ |
813 | if(prec == -1 || prec >= (long) sizeof(null) - 1) { |
814 | str = null; |
815 | len = sizeof(null) - 1; |
816 | /* Disable quotes around (nil) */ |
817 | p->flags &= (~FLAGS_ALT); |
818 | } |
819 | else { |
820 | str = "" ; |
821 | len = 0; |
822 | } |
823 | } |
824 | else if(prec != -1) |
825 | len = (size_t)prec; |
826 | else |
827 | len = strlen(str); |
828 | |
829 | width -= (len > LONG_MAX) ? LONG_MAX : (long)len; |
830 | |
831 | if(p->flags & FLAGS_ALT) |
832 | OUTCHAR('"'); |
833 | |
834 | if(!(p->flags&FLAGS_LEFT)) |
835 | while(width-- > 0) |
836 | OUTCHAR(' '); |
837 | |
838 | for(; len && *str; len--) |
839 | OUTCHAR(*str++); |
840 | if(p->flags&FLAGS_LEFT) |
841 | while(width-- > 0) |
842 | OUTCHAR(' '); |
843 | |
844 | if(p->flags & FLAGS_ALT) |
845 | OUTCHAR('"'); |
846 | } |
847 | break; |
848 | |
849 | case FORMAT_PTR: |
850 | /* Generic pointer. */ |
851 | { |
852 | void *ptr; |
853 | ptr = (void *) p->data.ptr; |
854 | if(ptr != NULL) { |
855 | /* If the pointer is not NULL, write it as a %#x spec. */ |
856 | base = 16; |
857 | digits = (p->flags & FLAGS_UPPER)? upper_digits : lower_digits; |
858 | is_alt = 1; |
859 | num = (size_t) ptr; |
860 | is_neg = 0; |
861 | goto number; |
862 | } |
863 | else { |
864 | /* Write "(nil)" for a nil pointer. */ |
865 | static const char strnil[] = "(nil)" ; |
866 | const char *point; |
867 | |
868 | width -= (long)(sizeof(strnil) - 1); |
869 | if(p->flags & FLAGS_LEFT) |
870 | while(width-- > 0) |
871 | OUTCHAR(' '); |
872 | for(point = strnil; *point != '\0'; ++point) |
873 | OUTCHAR(*point); |
874 | if(! (p->flags & FLAGS_LEFT)) |
875 | while(width-- > 0) |
876 | OUTCHAR(' '); |
877 | } |
878 | } |
879 | break; |
880 | |
881 | case FORMAT_DOUBLE: |
882 | { |
883 | char formatbuf[32]="%" ; |
884 | char *fptr = &formatbuf[1]; |
885 | size_t left = sizeof(formatbuf)-strlen(formatbuf); |
886 | int len; |
887 | |
888 | width = -1; |
889 | if(p->flags & FLAGS_WIDTH) |
890 | width = p->width; |
891 | else if(p->flags & FLAGS_WIDTHPARAM) |
892 | width = (long)vto[p->width].data.num.as_signed; |
893 | |
894 | prec = -1; |
895 | if(p->flags & FLAGS_PREC) |
896 | prec = p->precision; |
897 | else if(p->flags & FLAGS_PRECPARAM) |
898 | prec = (long)vto[p->precision].data.num.as_signed; |
899 | |
900 | if(p->flags & FLAGS_LEFT) |
901 | *fptr++ = '-'; |
902 | if(p->flags & FLAGS_SHOWSIGN) |
903 | *fptr++ = '+'; |
904 | if(p->flags & FLAGS_SPACE) |
905 | *fptr++ = ' '; |
906 | if(p->flags & FLAGS_ALT) |
907 | *fptr++ = '#'; |
908 | |
909 | *fptr = 0; |
910 | |
911 | if(width >= 0) { |
912 | if(width >= (long)sizeof(work)) |
913 | width = sizeof(work)-1; |
914 | /* RECURSIVE USAGE */ |
915 | len = curl_msnprintf(fptr, left, "%ld" , width); |
916 | fptr += len; |
917 | left -= len; |
918 | } |
919 | if(prec >= 0) { |
920 | /* for each digit in the integer part, we can have one less |
921 | precision */ |
922 | size_t maxprec = sizeof(work) - 2; |
923 | double val = p->data.dnum; |
924 | while(val >= 10.0) { |
925 | val /= 10; |
926 | maxprec--; |
927 | } |
928 | |
929 | if(prec > (long)maxprec) |
930 | prec = (long)maxprec-1; |
931 | /* RECURSIVE USAGE */ |
932 | len = curl_msnprintf(fptr, left, ".%ld" , prec); |
933 | fptr += len; |
934 | } |
935 | if(p->flags & FLAGS_LONG) |
936 | *fptr++ = 'l'; |
937 | |
938 | if(p->flags & FLAGS_FLOATE) |
939 | *fptr++ = (char)((p->flags & FLAGS_UPPER) ? 'E':'e'); |
940 | else if(p->flags & FLAGS_FLOATG) |
941 | *fptr++ = (char)((p->flags & FLAGS_UPPER) ? 'G' : 'g'); |
942 | else |
943 | *fptr++ = 'f'; |
944 | |
945 | *fptr = 0; /* and a final zero termination */ |
946 | |
947 | /* NOTE NOTE NOTE!! Not all sprintf implementations return number of |
948 | output characters */ |
949 | (sprintf)(work, formatbuf, p->data.dnum); |
950 | DEBUGASSERT(strlen(work) <= sizeof(work)); |
951 | for(fptr = work; *fptr; fptr++) |
952 | OUTCHAR(*fptr); |
953 | } |
954 | break; |
955 | |
956 | case FORMAT_INTPTR: |
957 | /* Answer the count of characters written. */ |
958 | #ifdef HAVE_LONG_LONG_TYPE |
959 | if(p->flags & FLAGS_LONGLONG) |
960 | *(LONG_LONG_TYPE *) p->data.ptr = (LONG_LONG_TYPE)done; |
961 | else |
962 | #endif |
963 | if(p->flags & FLAGS_LONG) |
964 | *(long *) p->data.ptr = (long)done; |
965 | else if(!(p->flags & FLAGS_SHORT)) |
966 | *(int *) p->data.ptr = (int)done; |
967 | else |
968 | *(short *) p->data.ptr = (short)done; |
969 | break; |
970 | |
971 | default: |
972 | break; |
973 | } |
974 | f = *end++; /* goto end of %-code */ |
975 | |
976 | } |
977 | return done; |
978 | } |
979 | |
980 | /* fputc() look-alike */ |
981 | static int addbyter(int output, FILE *data) |
982 | { |
983 | struct nsprintf *infop = (struct nsprintf *)data; |
984 | unsigned char outc = (unsigned char)output; |
985 | |
986 | if(infop->length < infop->max) { |
987 | /* only do this if we haven't reached max length yet */ |
988 | infop->buffer[0] = outc; /* store */ |
989 | infop->buffer++; /* increase pointer */ |
990 | infop->length++; /* we are now one byte larger */ |
991 | return outc; /* fputc() returns like this on success */ |
992 | } |
993 | return -1; |
994 | } |
995 | |
996 | int curl_mvsnprintf(char *buffer, size_t maxlength, const char *format, |
997 | va_list ap_save) |
998 | { |
999 | int retcode; |
1000 | struct nsprintf info; |
1001 | |
1002 | info.buffer = buffer; |
1003 | info.length = 0; |
1004 | info.max = maxlength; |
1005 | |
1006 | retcode = dprintf_formatf(&info, addbyter, format, ap_save); |
1007 | if((retcode != -1) && info.max) { |
1008 | /* we terminate this with a zero byte */ |
1009 | if(info.max == info.length) |
1010 | /* we're at maximum, scrap the last letter */ |
1011 | info.buffer[-1] = 0; |
1012 | else |
1013 | info.buffer[0] = 0; |
1014 | } |
1015 | return retcode; |
1016 | } |
1017 | |
1018 | int curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...) |
1019 | { |
1020 | int retcode; |
1021 | va_list ap_save; /* argument pointer */ |
1022 | va_start(ap_save, format); |
1023 | retcode = curl_mvsnprintf(buffer, maxlength, format, ap_save); |
1024 | va_end(ap_save); |
1025 | return retcode; |
1026 | } |
1027 | |
1028 | /* fputc() look-alike */ |
1029 | static int alloc_addbyter(int output, FILE *data) |
1030 | { |
1031 | struct asprintf *infop = (struct asprintf *)data; |
1032 | unsigned char outc = (unsigned char)output; |
1033 | |
1034 | if(!infop->buffer) { |
1035 | infop->buffer = malloc(32); |
1036 | if(!infop->buffer) { |
1037 | infop->fail = 1; |
1038 | return -1; /* fail */ |
1039 | } |
1040 | infop->alloc = 32; |
1041 | infop->len = 0; |
1042 | } |
1043 | else if(infop->len + 1 >= infop->alloc) { |
1044 | char *newptr = NULL; |
1045 | size_t newsize = infop->alloc*2; |
1046 | |
1047 | /* detect wrap-around or other overflow problems */ |
1048 | if(newsize > infop->alloc) |
1049 | newptr = realloc(infop->buffer, newsize); |
1050 | |
1051 | if(!newptr) { |
1052 | infop->fail = 1; |
1053 | return -1; /* fail */ |
1054 | } |
1055 | infop->buffer = newptr; |
1056 | infop->alloc = newsize; |
1057 | } |
1058 | |
1059 | infop->buffer[ infop->len ] = outc; |
1060 | |
1061 | infop->len++; |
1062 | |
1063 | return outc; /* fputc() returns like this on success */ |
1064 | } |
1065 | |
1066 | char *curl_maprintf(const char *format, ...) |
1067 | { |
1068 | va_list ap_save; /* argument pointer */ |
1069 | int retcode; |
1070 | struct asprintf info; |
1071 | |
1072 | info.buffer = NULL; |
1073 | info.len = 0; |
1074 | info.alloc = 0; |
1075 | info.fail = 0; |
1076 | |
1077 | va_start(ap_save, format); |
1078 | retcode = dprintf_formatf(&info, alloc_addbyter, format, ap_save); |
1079 | va_end(ap_save); |
1080 | if((-1 == retcode) || info.fail) { |
1081 | if(info.alloc) |
1082 | free(info.buffer); |
1083 | return NULL; |
1084 | } |
1085 | if(info.alloc) { |
1086 | info.buffer[info.len] = 0; /* we terminate this with a zero byte */ |
1087 | return info.buffer; |
1088 | } |
1089 | return strdup("" ); |
1090 | } |
1091 | |
1092 | char *curl_mvaprintf(const char *format, va_list ap_save) |
1093 | { |
1094 | int retcode; |
1095 | struct asprintf info; |
1096 | |
1097 | info.buffer = NULL; |
1098 | info.len = 0; |
1099 | info.alloc = 0; |
1100 | info.fail = 0; |
1101 | |
1102 | retcode = dprintf_formatf(&info, alloc_addbyter, format, ap_save); |
1103 | if((-1 == retcode) || info.fail) { |
1104 | if(info.alloc) |
1105 | free(info.buffer); |
1106 | return NULL; |
1107 | } |
1108 | |
1109 | if(info.alloc) { |
1110 | info.buffer[info.len] = 0; /* we terminate this with a zero byte */ |
1111 | return info.buffer; |
1112 | } |
1113 | return strdup("" ); |
1114 | } |
1115 | |
1116 | static int storebuffer(int output, FILE *data) |
1117 | { |
1118 | char **buffer = (char **)data; |
1119 | unsigned char outc = (unsigned char)output; |
1120 | **buffer = outc; |
1121 | (*buffer)++; |
1122 | return outc; /* act like fputc() ! */ |
1123 | } |
1124 | |
1125 | int curl_msprintf(char *buffer, const char *format, ...) |
1126 | { |
1127 | va_list ap_save; /* argument pointer */ |
1128 | int retcode; |
1129 | va_start(ap_save, format); |
1130 | retcode = dprintf_formatf(&buffer, storebuffer, format, ap_save); |
1131 | va_end(ap_save); |
1132 | *buffer = 0; /* we terminate this with a zero byte */ |
1133 | return retcode; |
1134 | } |
1135 | |
1136 | int curl_mprintf(const char *format, ...) |
1137 | { |
1138 | int retcode; |
1139 | va_list ap_save; /* argument pointer */ |
1140 | va_start(ap_save, format); |
1141 | |
1142 | retcode = dprintf_formatf(stdout, fputc, format, ap_save); |
1143 | va_end(ap_save); |
1144 | return retcode; |
1145 | } |
1146 | |
1147 | int curl_mfprintf(FILE *whereto, const char *format, ...) |
1148 | { |
1149 | int retcode; |
1150 | va_list ap_save; /* argument pointer */ |
1151 | va_start(ap_save, format); |
1152 | retcode = dprintf_formatf(whereto, fputc, format, ap_save); |
1153 | va_end(ap_save); |
1154 | return retcode; |
1155 | } |
1156 | |
1157 | int curl_mvsprintf(char *buffer, const char *format, va_list ap_save) |
1158 | { |
1159 | int retcode; |
1160 | retcode = dprintf_formatf(&buffer, storebuffer, format, ap_save); |
1161 | *buffer = 0; /* we terminate this with a zero byte */ |
1162 | return retcode; |
1163 | } |
1164 | |
1165 | int curl_mvprintf(const char *format, va_list ap_save) |
1166 | { |
1167 | return dprintf_formatf(stdout, fputc, format, ap_save); |
1168 | } |
1169 | |
1170 | int curl_mvfprintf(FILE *whereto, const char *format, va_list ap_save) |
1171 | { |
1172 | return dprintf_formatf(whereto, fputc, format, ap_save); |
1173 | } |
1174 | |