-
Notifications
You must be signed in to change notification settings - Fork 138
/
spf_render.c
918 lines (778 loc) · 31 KB
/
spf_render.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
/*
Copyright (C) 2001-2009, Parrot Foundation.
$Id$
=head1 NAME
src/spf_render.c - Parrot sprintf
=head1 DESCRIPTION
Implements the main function that drives the C<Parrot_sprintf> family
and its utility functions.
=head2 Utility Functions
=over 4
=cut
*/
#define IN_SPF_SYSTEM
#include "parrot/parrot.h"
#include "spf_render.str"
typedef enum {
PHASE_FLAGS = 0,
PHASE_WIDTH,
PHASE_PREC,
PHASE_TYPE,
PHASE_TERM,
PHASE_DONE
} PHASE;
typedef struct SpfInfo_tag {
UINTVAL width;
UINTVAL prec;
INTVAL flags;
INTVAL type;
PHASE phase;
} SpfInfo;
enum {
FLAG_MINUS = (1<<0),
FLAG_PLUS = (1<<1),
FLAG_ZERO = (1<<2),
FLAG_SPACE = (1<<3),
FLAG_SHARP = (1<<4),
FLAG_WIDTH = (1<<5),
FLAG_PREC = (1<<6)
};
/* HEADERIZER HFILE: include/parrot/misc.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void gen_sprintf_call(
ARGOUT(char *out),
ARGMOD(SpfInfo *info),
int thingy)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*out)
FUNC_MODIFIES(*info);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING * handle_flags(PARROT_INTERP,
ARGIN(const SpfInfo *info),
ARGIN(STRING *str),
INTVAL is_int_type,
ARGIN_NULLOK(STRING* prefix))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
PARROT_CANNOT_RETURN_NULL
static STRING* str_concat_w_flags(PARROT_INTERP,
ARGOUT(STRING *dest),
ARGIN(const SpfInfo *info),
ARGMOD(STRING *src),
ARGIN_NULLOK(STRING *prefix))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*dest)
FUNC_MODIFIES(*src);
#define ASSERT_ARGS_gen_sprintf_call __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(out) \
, PARROT_ASSERT_ARG(info))
#define ASSERT_ARGS_handle_flags __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(info) \
, PARROT_ASSERT_ARG(str))
#define ASSERT_ARGS_str_concat_w_flags __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(dest) \
, PARROT_ASSERT_ARG(info) \
, PARROT_ASSERT_ARG(src))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/* Per Dan's orders, we will not use sprintf if snprintf isn't
* around for us.
*/
#ifdef _MSC_VER
# define snprintf _snprintf
#endif
/*
=item C<static STRING * handle_flags(PARROT_INTERP, const SpfInfo *info, STRING
*str, INTVAL is_int_type, STRING* prefix)>
Handles C<+>, C<->, C<0>, C<#>, space, width, and prec.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING *
handle_flags(PARROT_INTERP, ARGIN(const SpfInfo *info), ARGIN(STRING *str),
INTVAL is_int_type, ARGIN_NULLOK(STRING* prefix))
{
ASSERT_ARGS(handle_flags)
UINTVAL len = Parrot_str_byte_length(interp, str);
if (is_int_type) {
if (info->flags & FLAG_PREC && info->prec == 0 &&
len == 1 &&
string_ord(interp, str, 0) == '0') {
str = Parrot_str_chopn(interp, str, len);
len = 0;
}
/* +, space */
if (!len || string_ord(interp, str, 0) != '-') {
if (info->flags & FLAG_PLUS) {
STRING * const cs = CONST_STRING(interp, "+");
str = Parrot_str_concat(interp, cs, str);
len++;
}
else if (info->flags & FLAG_SPACE) {
STRING * const cs = CONST_STRING(interp, " ");
str = Parrot_str_concat(interp, cs, str);
len++;
}
}
/* # 0x ... */
if ((info->flags & FLAG_SHARP) && prefix) {
str = Parrot_str_concat(interp, prefix, str);
len += Parrot_str_byte_length(interp, prefix);
}
/* XXX sharp + fill ??? */
#if 0
/* precision - only for floats, which is handled elsewhere */
if (info->flags & FLAG_PREC) {
info->flags |= FLAG_WIDTH;
if (string_ord(interp, str, 0) == '-' ||
string_ord(interp, str, 0) == '+') {
info->width = info->prec + 1;
}
else {
info->width = info->prec;
}
}
#endif
}
else {
/* string precision */
if (info->flags & FLAG_PREC && info->prec == 0) {
str = Parrot_str_chopn(interp, str, len);
len = 0;
}
else if (info->flags & FLAG_PREC && info->prec < len) {
str = Parrot_str_chopn(interp, str, -(INTVAL)(info->prec));
len = info->prec;
}
}
if ((info->flags & FLAG_WIDTH) && info->width > len) {
STRING * const filler =
((info->flags & FLAG_ZERO) && !(info->flags & FLAG_MINUS))
? CONST_STRING(interp, "0")
: CONST_STRING(interp, " ");
STRING * const fill = Parrot_str_repeat(interp, filler, info->width - len);
if (info->flags & FLAG_MINUS) { /* left-align */
str = Parrot_str_concat(interp, str, fill);
}
else { /* right-align */
/* signed and zero padded */
if (info->flags & FLAG_ZERO
&& (string_ord(interp, str, 0) == '-' ||
string_ord(interp, str, 0) == '+')) {
STRING *temp = NULL;
STRING *ignored;
temp = Parrot_str_substr(interp, str, 1, len-1);
str = Parrot_str_chopn(interp, str, -1);
str = Parrot_str_concat(interp, str, fill);
str = Parrot_str_concat(interp, str, temp);
}
else {
str = Parrot_str_concat(interp, fill, str);
}
}
}
return str;
}
/*
=item C<static STRING* str_concat_w_flags(PARROT_INTERP, STRING *dest, const
SpfInfo *info, STRING *src, STRING *prefix)>
Used by Parrot_sprintf_format. Prepends supplied prefix for numeric
values. (e.g. 0x for hex.)
Returns the pointer to the modified string.
=cut
*/
PARROT_CANNOT_RETURN_NULL
static STRING*
str_concat_w_flags(PARROT_INTERP, ARGOUT(STRING *dest), ARGIN(const SpfInfo *info),
ARGMOD(STRING *src), ARGIN_NULLOK(STRING *prefix))
{
ASSERT_ARGS(str_concat_w_flags)
src = handle_flags(interp, info, src, 1, prefix);
dest = Parrot_str_concat(interp, dest, src);
return dest;
}
/*
=item C<static void gen_sprintf_call(char *out, SpfInfo *info, int thingy)>
Turn the info structure back into an sprintf format. Far from being
pointless, this is used to call C<snprintf()> when we're confronted with
a float.
=cut
*/
static void
gen_sprintf_call(ARGOUT(char *out), ARGMOD(SpfInfo *info), int thingy)
{
ASSERT_ARGS(gen_sprintf_call)
const int flags = info->flags;
char *p = out;
*p++ = '%';
if (flags) {
if (flags & FLAG_MINUS)
*p++ = '-';
if (flags & FLAG_PLUS)
*p++ = '+';
if (flags & FLAG_ZERO)
*p++ = '0';
if (flags & FLAG_SPACE)
*p++ = ' ';
if (flags & FLAG_SHARP)
*p++ = '#';
if (flags & FLAG_WIDTH) {
if (info->width > PARROT_SPRINTF_BUFFER_SIZE - 1)
info->width = PARROT_SPRINTF_BUFFER_SIZE;
p += sprintf(p, "%u", (unsigned)info->width);
}
if (flags & FLAG_PREC) {
if (info->prec > PARROT_SPRINTF_MAX_PREC)
info->prec = PARROT_SPRINTF_MAX_PREC;
*p++ = '.';
p += sprintf(p, "%u", (unsigned)info->prec);
}
}
if (thingy == 'd' || thingy == 'i' ||thingy == 'u') {
/* the u?int isa HUGEU?INTVAL aka long long
* the 'll' modifier is specced in susv3 - hopefully all our
* compilers support it too */
*p++ = 'l';
*p++ = 'l';
}
*p++ = (char)thingy;
*p = '\0';
}
/*
=item C<STRING * Parrot_sprintf_format(PARROT_INTERP, STRING *pat, SPRINTF_OBJ
*obj)>
This is the engine that does all the formatting.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
STRING *
Parrot_sprintf_format(PARROT_INTERP,
ARGIN(STRING *pat), ARGIN(SPRINTF_OBJ *obj))
{
ASSERT_ARGS(Parrot_sprintf_format)
INTVAL i;
INTVAL len = 0;
INTVAL old = 0;
const INTVAL pat_len = (INTVAL)Parrot_str_byte_length(interp, pat);
HUGEINTVAL num;
/* start with a buffer; double the pattern length to avoid realloc #1 */
STRING *targ = Parrot_str_new_noinit(interp, enum_stringrep_one, pat_len * 2);
/* ts is used almost universally as an intermediate target;
* tc is used as a temporary buffer by Parrot_str_from_uint and
* as a target by gen_sprintf_call.
*/
STRING *substr = NULL;
char tc[PARROT_SPRINTF_BUFFER_SIZE];
for (i = 0; i < pat_len; i++) {
if (string_ord(interp, pat, i) == '%') { /* % */
if (len) {
substr = Parrot_str_substr(interp, pat, old, len);
/* XXX This shouldn't modify targ the pointer */
targ = Parrot_str_concat(interp, targ, substr);
}
len = 0;
old = i;
if (string_ord(interp, pat, i + 1) == '%') {
/* skip this one, make next the first char
* of literal sequence, starting at old */
i++;
old++;
len++;
continue;
}
else {
/* hoo boy, here we go... */
HUGEINTVAL sharedint = 0;
/* Storage for flags, etc. */
SpfInfo info = { 0, 0, 0, 0, (PHASE)0 };
/* Reset temporaries */
tc[0] = '\0';
/* This can be really hard to understand, so I'll try to explain beforehand.
* A rough grammar for a printf format is:
*
* grammar Parrot::PrintF_Format {
* rule format {
* <other_stuff> (<field> <other_stuff>)*
* }
*
* rule other_stuff {
* [<[^\%]> | \%\%]*:
* }
*
* rule field {
* \%
* <flags>?
* <width>?
* [\.<prec>]?
* <size>?
* <term>
* }
*
* rule flags {
* <[
* + # prefix with a + if necessary
* - # left-align
* 0 # zero-pad
* <sp> # space-pad
* \# # 0, 0x on octal, hex; force decimal point on float
* ]>+
* }
*
* rule width {
* [\d|\*]+ # minimum width
* }
*
* rule prec {
* [\d|\*]+ # width on integers;
* # number of digits after decimal on floats;
* # maximum width on strings
* }
*
* rule size {
* <[
* h # short (or float)
* l # long
* H # HUGEwhateverVAL (long [long]?, [long]? double)
* v # whateverVAL
* O # opcode_t
* P # really a PMC
* S # Parrot string (only with %s)
* ]>
* }
*
* rule term {
* <[
* c # char
* d # integer
* i # integer
* o # octal
* x # hex
* X # hex with capital X (if #)
* b # binary
* B # binary with capital B (if #)
* u # unsigned integer
* p # pointer
*
* e # 1e1
* E # 1E1
* f # 1.0
* g # 1, 0.1, 1e1
* G # 1, 0.1, 1E1
*
* s # string
* ]>
* }
* }
*
* Complication: once upon a time, %P existed. Now you should
* use %Ps, %Pd or %Pf, but we still need to support the old form.
* The same is true of %S--%Ss is the best form, but %S is still
* supported.
*
* The implementation of Parrot_vsprintf is surprisingly similar to this
* regex, even though the two were developed semi-independently.
* Parrot_vsprintf keeps track of what it expects to see next (the
* 'phase')--flags, width, precision, size, or field type (term). If it
* doesn't find a character that fits whatever it's expecting, it sets
* info.phase to the next thing and tries it. The first four phases just
* set flags--the last does all the work.
*/
for (i++; i < pat_len && info.phase != PHASE_DONE; i++) {
const INTVAL ch = string_ord(interp, pat, i);
switch (info.phase) {
/*@fallthrough@ */ case PHASE_FLAGS:
switch (ch) {
case '-':
info.flags |= FLAG_MINUS;
continue;
case '+':
info.flags |= FLAG_PLUS;
continue;
case '0':
info.flags |= FLAG_ZERO;
continue;
case ' ':
info.flags |= FLAG_SPACE;
continue;
case '#':
info.flags |= FLAG_SHARP;
continue;
default:
info.phase = PHASE_WIDTH;
}
/*@fallthrough@ */ case PHASE_WIDTH:
switch (ch) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
info.flags |= FLAG_WIDTH;
info.width *= 10;
info.width += ch - '0';
continue;
case '*':
info.flags |= FLAG_WIDTH;
num = obj->getint(interp, SIZE_XVAL, obj);
if (num < 0) {
info.flags |= FLAG_MINUS;
info.width = -num;
}
else {
info.width = num;
}
continue;
case '.':
info.phase = PHASE_PREC;
continue;
default:
info.phase = PHASE_PREC;
}
/*@fallthrough@ */ case PHASE_PREC:
switch (ch) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
info.flags |= FLAG_PREC;
info.prec *= 10;
info.prec += ch - '0';
continue;
case '*':
info.flags |= FLAG_PREC;
info.prec = (UINTVAL)obj->getint(interp,
SIZE_XVAL, obj);
info.phase = PHASE_TYPE;
continue;
default:
info.phase = PHASE_TYPE;
}
/*@fallthrough@ */ case PHASE_TYPE:
switch (ch) {
case 'h':
info.type = SIZE_SHORT;
continue;
case 'l':
info.type = SIZE_LONG;
continue;
case 'L':
case 'H':
info.type = SIZE_HUGE;
continue;
case 'v':
info.type = SIZE_XVAL;
continue;
case 'O':
info.type = SIZE_OPCODE;
continue;
case 'P':
info.type = SIZE_PMC;
continue;
case 'S':
info.type = SIZE_PSTR;
continue;
default:
info.phase = PHASE_TERM;
}
/*@fallthrough@ */ case PHASE_TERM:
switch (ch) {
/* INTEGERS */
case 'c':
{
STRING * const ts = string_chr(interp,
(UINTVAL)obj->getint(interp, info.type, obj));
targ = str_concat_w_flags(interp, targ, &info, ts, NULL);
}
break;
case 'o':
{
const UHUGEINTVAL theuint =
obj->getuint(interp, info.type, obj);
STRING * const ts =
Parrot_str_from_uint(interp, tc, theuint, 8, 0);
STRING * const prefix = CONST_STRING(interp, "0");
/* unsigned conversion - no plus */
info.flags &= ~FLAG_PLUS;
targ = str_concat_w_flags(interp, targ,
&info, ts, prefix);
}
break;
case 'x':
{
const UHUGEINTVAL theuint =
obj->getuint(interp, info.type, obj);
STRING * const ts =
Parrot_str_from_uint(interp, tc, theuint, 16, 0);
STRING * const prefix = CONST_STRING(interp, "0x");
/* unsigned conversion - no plus */
info.flags &= ~FLAG_PLUS;
targ = str_concat_w_flags(interp, targ,
&info, ts, prefix);
}
break;
case 'X':
{
STRING * const prefix = CONST_STRING(interp, "0X");
const UHUGEINTVAL theuint =
obj->getuint(interp, info.type, obj);
STRING * ts =
Parrot_str_from_uint(interp, tc, theuint, 16, 0);
ts = Parrot_str_upcase(interp, ts);
/* unsigned conversion - no plus */
info.flags &= ~FLAG_PLUS;
targ = str_concat_w_flags(interp, targ,
&info, ts, prefix);
}
break;
case 'b':
{
STRING * const prefix = CONST_STRING(interp, "0b");
const UHUGEINTVAL theuint =
obj->getuint(interp, info.type, obj);
STRING * const ts =
Parrot_str_from_uint(interp, tc, theuint, 2, 0);
/* unsigned conversion - no plus */
info.flags &= ~FLAG_PLUS;
targ = str_concat_w_flags(interp, targ,
&info, ts, prefix);
}
break;
case 'B':
{
STRING * const prefix = CONST_STRING(interp, "0B");
const HUGEINTVAL theint =
obj->getint(interp, info.type, obj);
STRING * const ts =
Parrot_str_from_int_base(interp, tc, theint, 2);
/* unsigned conversion - no plus */
info.flags &= ~FLAG_PLUS;
targ = str_concat_w_flags(interp, targ,
&info, ts, prefix);
}
break;
case 'u':
{
const UHUGEINTVAL theuint =
obj->getuint(interp, info.type, obj);
sharedint = theuint;
}
goto do_sprintf;
case 'd':
case 'i':
/* EVIL: Work around bug in glibc that makes %0lld
* sometimes output an empty string. */
if (!(info.flags & FLAG_WIDTH))
info.flags &= ~FLAG_ZERO;
sharedint = obj->getint(interp, info.type, obj);
do_sprintf:
{
STRING *ts;
gen_sprintf_call(tc, &info, ch);
ts = cstr2pstr(tc);
{
char * const tempstr =
Parrot_str_to_cstring(interp, ts);
#ifdef PARROT_HAS_SNPRINTF
snprintf(tc, PARROT_SPRINTF_BUFFER_SIZE,
tempstr, sharedint);
#else
/* the buffer is 4096, so no problem here */
sprintf(tc, tempstr, sharedint);
#endif
Parrot_str_free_cstring(tempstr);
}
targ = Parrot_str_concat(interp, targ, cstr2pstr(tc));
}
break;
case 'p':
{
STRING * const prefix = CONST_STRING(interp, "0x");
const void * const ptr =
obj->getptr(interp, info.type, obj);
STRING * const ts = Parrot_str_from_uint(interp, tc,
(UHUGEINTVAL) (size_t) ptr, 16, 0);
targ = str_concat_w_flags(interp, targ, &info,
ts, prefix);
}
break;
/* FLOATS - We cheat on these and use snprintf. */
case 'e':
case 'E':
case 'f':
case 'g':
case 'G':
{
STRING *ts;
const HUGEFLOATVAL thefloat =
obj->getfloat(interp, info.type, obj);
/* check for Inf and NaN values */
if (thefloat == PARROT_FLOATVAL_INF_POSITIVE) {
ts = cstr2pstr(PARROT_CSTRING_INF_POSITIVE);
}
else if (thefloat == PARROT_FLOATVAL_INF_NEGATIVE) {
ts = cstr2pstr(PARROT_CSTRING_INF_NEGATIVE);
}
else if (thefloat != thefloat) {
ts = cstr2pstr(PARROT_CSTRING_NAN_QUIET);
}
else {
/* turn -0.0 into 0.0 */
gen_sprintf_call(tc, &info, ch);
ts = cstr2pstr(tc);
}
/* XXX lost precision if %Hg or whatever */
{
char * const tempstr =
Parrot_str_to_cstring(interp, ts);
#ifdef PARROT_HAS_SNPRINTF
snprintf(tc, PARROT_SPRINTF_BUFFER_SIZE,
tempstr,
(double)thefloat);
#else
/* the buffer is 4096, so no problem here */
sprintf(tc, tempstr, (double)thefloat);
#endif
Parrot_str_free_cstring(tempstr);
}
#ifdef WIN32
/* Microsoft defaults to three digits for
* exponents, even when fewer digits would suffice.
* For the sake of portability, we will here
* attempt to hide that. */
if (ch == 'g' || ch == 'G'
|| ch == 'e' || ch == 'E') {
const size_t tclen = strlen(tc);
size_t j;
for (j = 0; j < tclen; j++) {
if ((tc[j] == 'e' || tc[j] == 'E')
&& (tc[j+1] == '+' || tc[j+1] == '-')
&& tc[j+2] == '0'
&& isdigit((unsigned char)tc[j+3])
&& isdigit((unsigned char)tc[j+4]))
{
mem_sys_memmove(&tc[j+2], &tc[j+3],
strlen(&tc[j+2]));
/* now fix any broken length */
if ((info.flags & FLAG_WIDTH)
&& strlen(tc) < info.width) {
if (info.flags & FLAG_MINUS)
strcat(tc, " ");
else {
mem_sys_memmove(&tc[1], &tc[0],
strlen(tc) + 1);
tc[0] = (info.flags & FLAG_ZERO) ? '0' : ' ';
}
}
/* only one fix required per string */
break;
}
}
}
#endif /* WIN32 */
targ = Parrot_str_concat(interp, targ, cstr2pstr(tc));
}
break;
/* STRINGS */
case 'r': /* Python repr */
/* XXX the right fix is to add a getrepr entry *
* to SPRINTF_OBJ, but for now, getstring_pmc *
* is inlined and modified to call get_repr */
if (obj->getstring == pmc_core.getstring) {
PMC * const tmp =
VTABLE_get_pmc_keyed_int(interp,
((PMC *)obj->data),
(obj->index));
STRING * const string = (VTABLE_get_repr(interp, tmp));
STRING * const ts = handle_flags(interp, &info,
string, 0, NULL);
obj->index++;
targ = Parrot_str_concat(interp, targ, ts);
break;
}
case 's':
CASE_s:
{
STRING * const string = obj->getstring(interp,
info.type, obj);
/* XXX Silently ignore? */
if (!STRING_IS_NULL(string)) {
STRING * const ts = handle_flags(interp,
&info, string, 0, NULL);
targ = Parrot_str_concat(interp, targ, ts);
}
}
break;
default:
/* fake the old %P and %S commands */
if (info.type == SIZE_PMC
|| info.type == SIZE_PSTR) {
i--;
goto CASE_s;
/* case 's' will see the SIZE_PMC or SIZE_PSTR
* and assume it was %Ps (or %Ss). Genius,
* no? */
}
else {
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_CHARACTER,
"'%c' is not a valid sprintf format", ch);
}
}
info.phase = PHASE_DONE;
break;
case PHASE_DONE:
default:
/* This is the terminating condition of the surrounding
* loop, so...
*/
PANIC(interp, "We can't be here");
}
}
}
old = i;
i--;
}
else {
len++;
}
}
if (len) {
substr = Parrot_str_substr(interp, pat, old, len);
targ = Parrot_str_concat(interp, targ, substr);
}
return targ;
}
/*
=back
=head1 SEE ALSO
F<src/misc.h>, F<src/misc.c>, F<src/spf_vtable.c>.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/