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comparison perl-5.22.2/pp_pack.c @ 8045:a16537d2fe07
<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author | HackBot |
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date | Sat, 14 May 2016 14:54:38 +0000 |
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1 /* pp_pack.c | |
2 * | |
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, | |
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others | |
5 * | |
6 * You may distribute under the terms of either the GNU General Public | |
7 * License or the Artistic License, as specified in the README file. | |
8 * | |
9 */ | |
10 | |
11 /* | |
12 * He still hopefully carried some of his gear in his pack: a small tinder-box, | |
13 * two small shallow pans, the smaller fitting into the larger; inside them a | |
14 * wooden spoon, a short two-pronged fork and some skewers were stowed; and | |
15 * hidden at the bottom of the pack in a flat wooden box a dwindling treasure, | |
16 * some salt. | |
17 * | |
18 * [p.653 of _The Lord of the Rings_, IV/iv: "Of Herbs and Stewed Rabbit"] | |
19 */ | |
20 | |
21 /* This file contains pp ("push/pop") functions that | |
22 * execute the opcodes that make up a perl program. A typical pp function | |
23 * expects to find its arguments on the stack, and usually pushes its | |
24 * results onto the stack, hence the 'pp' terminology. Each OP structure | |
25 * contains a pointer to the relevant pp_foo() function. | |
26 * | |
27 * This particular file just contains pp_pack() and pp_unpack(). See the | |
28 * other pp*.c files for the rest of the pp_ functions. | |
29 */ | |
30 | |
31 #include "EXTERN.h" | |
32 #define PERL_IN_PP_PACK_C | |
33 #include "perl.h" | |
34 | |
35 /* Types used by pack/unpack */ | |
36 typedef enum { | |
37 e_no_len, /* no length */ | |
38 e_number, /* number, [] */ | |
39 e_star /* asterisk */ | |
40 } howlen_t; | |
41 | |
42 typedef struct tempsym { | |
43 const char* patptr; /* current template char */ | |
44 const char* patend; /* one after last char */ | |
45 const char* grpbeg; /* 1st char of ()-group */ | |
46 const char* grpend; /* end of ()-group */ | |
47 I32 code; /* template code (!<>) */ | |
48 I32 length; /* length/repeat count */ | |
49 howlen_t howlen; /* how length is given */ | |
50 int level; /* () nesting level */ | |
51 U32 flags; /* /=4, comma=2, pack=1 */ | |
52 /* and group modifiers */ | |
53 STRLEN strbeg; /* offset of group start */ | |
54 struct tempsym *previous; /* previous group */ | |
55 } tempsym_t; | |
56 | |
57 #define TEMPSYM_INIT(symptr, p, e, f) \ | |
58 STMT_START { \ | |
59 (symptr)->patptr = (p); \ | |
60 (symptr)->patend = (e); \ | |
61 (symptr)->grpbeg = NULL; \ | |
62 (symptr)->grpend = NULL; \ | |
63 (symptr)->grpend = NULL; \ | |
64 (symptr)->code = 0; \ | |
65 (symptr)->length = 0; \ | |
66 (symptr)->howlen = e_no_len; \ | |
67 (symptr)->level = 0; \ | |
68 (symptr)->flags = (f); \ | |
69 (symptr)->strbeg = 0; \ | |
70 (symptr)->previous = NULL; \ | |
71 } STMT_END | |
72 | |
73 typedef union { | |
74 NV nv; | |
75 U8 bytes[sizeof(NV)]; | |
76 } NV_bytes; | |
77 | |
78 #if defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE) | |
79 typedef union { | |
80 long double ld; | |
81 U8 bytes[sizeof(long double)]; | |
82 } ld_bytes; | |
83 #endif | |
84 | |
85 #ifndef CHAR_BIT | |
86 # define CHAR_BIT 8 | |
87 #endif | |
88 /* Maximum number of bytes to which a byte can grow due to upgrade */ | |
89 #define UTF8_EXPAND 2 | |
90 | |
91 /* | |
92 * Offset for integer pack/unpack. | |
93 * | |
94 * On architectures where I16 and I32 aren't really 16 and 32 bits, | |
95 * which for now are all Crays, pack and unpack have to play games. | |
96 */ | |
97 | |
98 /* | |
99 * These values are required for portability of pack() output. | |
100 * If they're not right on your machine, then pack() and unpack() | |
101 * wouldn't work right anyway; you'll need to apply the Cray hack. | |
102 * (I'd like to check them with #if, but you can't use sizeof() in | |
103 * the preprocessor.) --??? | |
104 */ | |
105 /* | |
106 The appropriate SHORTSIZE, INTSIZE, LONGSIZE, and LONGLONGSIZE | |
107 defines are now in config.h. --Andy Dougherty April 1998 | |
108 */ | |
109 #define SIZE16 2 | |
110 #define SIZE32 4 | |
111 | |
112 /* CROSSCOMPILE and MULTIARCH are going to affect pp_pack() and pp_unpack(). | |
113 --jhi Feb 1999 */ | |
114 | |
115 #if U16SIZE > SIZE16 || U32SIZE > SIZE32 | |
116 # if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678 /* little-endian */ | |
117 # define OFF16(p) ((char*)(p)) | |
118 # define OFF32(p) ((char*)(p)) | |
119 # else | |
120 # if BYTEORDER == 0x4321 || BYTEORDER == 0x87654321 /* big-endian */ | |
121 # define OFF16(p) ((char*)(p) + (sizeof(U16) - SIZE16)) | |
122 # define OFF32(p) ((char*)(p) + (sizeof(U32) - SIZE32)) | |
123 # else | |
124 ++++ bad cray byte order | |
125 # endif | |
126 # endif | |
127 #else | |
128 # define OFF16(p) ((char *) (p)) | |
129 # define OFF32(p) ((char *) (p)) | |
130 #endif | |
131 | |
132 #define PUSH16(utf8, cur, p, needs_swap) \ | |
133 PUSH_BYTES(utf8, cur, OFF16(p), SIZE16, needs_swap) | |
134 #define PUSH32(utf8, cur, p, needs_swap) \ | |
135 PUSH_BYTES(utf8, cur, OFF32(p), SIZE32, needs_swap) | |
136 | |
137 #if BYTEORDER == 0x4321 || BYTEORDER == 0x87654321 /* big-endian */ | |
138 # define NEEDS_SWAP(d) (TYPE_ENDIANNESS(d) == TYPE_IS_LITTLE_ENDIAN) | |
139 #elif BYTEORDER == 0x1234 || BYTEORDER == 0x12345678 /* little-endian */ | |
140 # define NEEDS_SWAP(d) (TYPE_ENDIANNESS(d) == TYPE_IS_BIG_ENDIAN) | |
141 #else | |
142 # error "Unsupported byteorder" | |
143 /* Need to add code here to re-instate mixed endian support. | |
144 NEEDS_SWAP would need to hold a flag indicating which action to | |
145 take, and S_reverse_copy and the code in S_utf8_to_bytes would need | |
146 logic adding to deal with any mixed-endian transformations needed. | |
147 */ | |
148 #endif | |
149 | |
150 /* Only to be used inside a loop (see the break) */ | |
151 #define SHIFT_BYTES(utf8, s, strend, buf, len, datumtype, needs_swap) \ | |
152 STMT_START { \ | |
153 if (UNLIKELY(utf8)) { \ | |
154 if (!S_utf8_to_bytes(aTHX_ &s, strend, \ | |
155 (char *) (buf), len, datumtype)) break; \ | |
156 } else { \ | |
157 if (UNLIKELY(needs_swap)) \ | |
158 S_reverse_copy(s, (char *) (buf), len); \ | |
159 else \ | |
160 Copy(s, (char *) (buf), len, char); \ | |
161 s += len; \ | |
162 } \ | |
163 } STMT_END | |
164 | |
165 #define SHIFT16(utf8, s, strend, p, datumtype, needs_swap) \ | |
166 SHIFT_BYTES(utf8, s, strend, OFF16(p), SIZE16, datumtype, needs_swap) | |
167 | |
168 #define SHIFT32(utf8, s, strend, p, datumtype, needs_swap) \ | |
169 SHIFT_BYTES(utf8, s, strend, OFF32(p), SIZE32, datumtype, needs_swap) | |
170 | |
171 #define SHIFT_VAR(utf8, s, strend, var, datumtype, needs_swap) \ | |
172 SHIFT_BYTES(utf8, s, strend, &(var), sizeof(var), datumtype, needs_swap) | |
173 | |
174 #define PUSH_VAR(utf8, aptr, var, needs_swap) \ | |
175 PUSH_BYTES(utf8, aptr, &(var), sizeof(var), needs_swap) | |
176 | |
177 /* Avoid stack overflow due to pathological templates. 100 should be plenty. */ | |
178 #define MAX_SUB_TEMPLATE_LEVEL 100 | |
179 | |
180 /* flags (note that type modifiers can also be used as flags!) */ | |
181 #define FLAG_WAS_UTF8 0x40 | |
182 #define FLAG_PARSE_UTF8 0x20 /* Parse as utf8 */ | |
183 #define FLAG_UNPACK_ONLY_ONE 0x10 | |
184 #define FLAG_DO_UTF8 0x08 /* The underlying string is utf8 */ | |
185 #define FLAG_SLASH 0x04 | |
186 #define FLAG_COMMA 0x02 | |
187 #define FLAG_PACK 0x01 | |
188 | |
189 STATIC SV * | |
190 S_mul128(pTHX_ SV *sv, U8 m) | |
191 { | |
192 STRLEN len; | |
193 char *s = SvPV(sv, len); | |
194 char *t; | |
195 | |
196 PERL_ARGS_ASSERT_MUL128; | |
197 | |
198 if (!strnEQ(s, "0000", 4)) { /* need to grow sv */ | |
199 SV * const tmpNew = newSVpvs("0000000000"); | |
200 | |
201 sv_catsv(tmpNew, sv); | |
202 SvREFCNT_dec(sv); /* free old sv */ | |
203 sv = tmpNew; | |
204 s = SvPV(sv, len); | |
205 } | |
206 t = s + len - 1; | |
207 while (!*t) /* trailing '\0'? */ | |
208 t--; | |
209 while (t > s) { | |
210 const U32 i = ((*t - '0') << 7) + m; | |
211 *(t--) = '0' + (char)(i % 10); | |
212 m = (char)(i / 10); | |
213 } | |
214 return (sv); | |
215 } | |
216 | |
217 /* Explosives and implosives. */ | |
218 | |
219 #define ISUUCHAR(ch) (NATIVE_TO_LATIN1(ch) >= NATIVE_TO_LATIN1(' ') \ | |
220 && NATIVE_TO_LATIN1(ch) < NATIVE_TO_LATIN1('a')) | |
221 | |
222 /* type modifiers */ | |
223 #define TYPE_IS_SHRIEKING 0x100 | |
224 #define TYPE_IS_BIG_ENDIAN 0x200 | |
225 #define TYPE_IS_LITTLE_ENDIAN 0x400 | |
226 #define TYPE_IS_PACK 0x800 | |
227 #define TYPE_ENDIANNESS_MASK (TYPE_IS_BIG_ENDIAN|TYPE_IS_LITTLE_ENDIAN) | |
228 #define TYPE_MODIFIERS(t) ((t) & ~0xFF) | |
229 #define TYPE_NO_MODIFIERS(t) ((t) & 0xFF) | |
230 | |
231 # define TYPE_ENDIANNESS(t) ((t) & TYPE_ENDIANNESS_MASK) | |
232 # define TYPE_NO_ENDIANNESS(t) ((t) & ~TYPE_ENDIANNESS_MASK) | |
233 | |
234 # define ENDIANNESS_ALLOWED_TYPES "sSiIlLqQjJfFdDpP(" | |
235 | |
236 #define PACK_SIZE_CANNOT_CSUM 0x80 | |
237 #define PACK_SIZE_UNPREDICTABLE 0x40 /* Not a fixed size element */ | |
238 #define PACK_SIZE_MASK 0x3F | |
239 | |
240 #include "packsizetables.c" | |
241 | |
242 static void | |
243 S_reverse_copy(const char *src, char *dest, STRLEN len) | |
244 { | |
245 dest += len; | |
246 while (len--) | |
247 *--dest = *src++; | |
248 } | |
249 | |
250 STATIC U8 | |
251 utf8_to_byte(pTHX_ const char **s, const char *end, I32 datumtype) | |
252 { | |
253 STRLEN retlen; | |
254 UV val = utf8n_to_uvchr((U8 *) *s, end-*s, &retlen, | |
255 ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); | |
256 /* We try to process malformed UTF-8 as much as possible (preferably with | |
257 warnings), but these two mean we make no progress in the string and | |
258 might enter an infinite loop */ | |
259 if (retlen == (STRLEN) -1 || retlen == 0) | |
260 Perl_croak(aTHX_ "Malformed UTF-8 string in '%c' format in unpack", | |
261 (int) TYPE_NO_MODIFIERS(datumtype)); | |
262 if (val >= 0x100) { | |
263 Perl_ck_warner(aTHX_ packWARN(WARN_UNPACK), | |
264 "Character in '%c' format wrapped in unpack", | |
265 (int) TYPE_NO_MODIFIERS(datumtype)); | |
266 val &= 0xff; | |
267 } | |
268 *s += retlen; | |
269 return (U8)val; | |
270 } | |
271 | |
272 #define SHIFT_BYTE(utf8, s, strend, datumtype) ((utf8) ? \ | |
273 utf8_to_byte(aTHX_ &(s), (strend), (datumtype)) : \ | |
274 *(U8 *)(s)++) | |
275 | |
276 STATIC bool | |
277 S_utf8_to_bytes(pTHX_ const char **s, const char *end, const char *buf, int buf_len, I32 datumtype) | |
278 { | |
279 UV val; | |
280 STRLEN retlen; | |
281 const char *from = *s; | |
282 int bad = 0; | |
283 const U32 flags = ckWARN(WARN_UTF8) ? | |
284 UTF8_CHECK_ONLY : (UTF8_CHECK_ONLY | UTF8_ALLOW_ANY); | |
285 const bool needs_swap = NEEDS_SWAP(datumtype); | |
286 | |
287 if (UNLIKELY(needs_swap)) | |
288 buf += buf_len; | |
289 | |
290 for (;buf_len > 0; buf_len--) { | |
291 if (from >= end) return FALSE; | |
292 val = utf8n_to_uvchr((U8 *) from, end-from, &retlen, flags); | |
293 if (retlen == (STRLEN) -1 || retlen == 0) { | |
294 from += UTF8SKIP(from); | |
295 bad |= 1; | |
296 } else from += retlen; | |
297 if (val >= 0x100) { | |
298 bad |= 2; | |
299 val &= 0xff; | |
300 } | |
301 if (UNLIKELY(needs_swap)) | |
302 *(U8 *)--buf = (U8)val; | |
303 else | |
304 *(U8 *)buf++ = (U8)val; | |
305 } | |
306 /* We have enough characters for the buffer. Did we have problems ? */ | |
307 if (bad) { | |
308 if (bad & 1) { | |
309 /* Rewalk the string fragment while warning */ | |
310 const char *ptr; | |
311 const int flags = ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY; | |
312 for (ptr = *s; ptr < from; ptr += UTF8SKIP(ptr)) { | |
313 if (ptr >= end) break; | |
314 utf8n_to_uvchr((U8 *) ptr, end-ptr, &retlen, flags); | |
315 } | |
316 if (from > end) from = end; | |
317 } | |
318 if ((bad & 2)) | |
319 Perl_ck_warner(aTHX_ packWARN(datumtype & TYPE_IS_PACK ? | |
320 WARN_PACK : WARN_UNPACK), | |
321 "Character(s) in '%c' format wrapped in %s", | |
322 (int) TYPE_NO_MODIFIERS(datumtype), | |
323 datumtype & TYPE_IS_PACK ? "pack" : "unpack"); | |
324 } | |
325 *s = from; | |
326 return TRUE; | |
327 } | |
328 | |
329 STATIC char * | |
330 S_my_bytes_to_utf8(const U8 *start, STRLEN len, char *dest, const bool needs_swap) { | |
331 PERL_ARGS_ASSERT_MY_BYTES_TO_UTF8; | |
332 | |
333 if (UNLIKELY(needs_swap)) { | |
334 const U8 *p = start + len; | |
335 while (p-- > start) { | |
336 append_utf8_from_native_byte(*p, (U8 **) & dest); | |
337 } | |
338 } else { | |
339 const U8 * const end = start + len; | |
340 while (start < end) { | |
341 append_utf8_from_native_byte(*start, (U8 **) & dest); | |
342 start++; | |
343 } | |
344 } | |
345 return dest; | |
346 } | |
347 | |
348 #define PUSH_BYTES(utf8, cur, buf, len, needs_swap) \ | |
349 STMT_START { \ | |
350 if (UNLIKELY(utf8)) \ | |
351 (cur) = my_bytes_to_utf8((U8 *) buf, len, (cur), needs_swap); \ | |
352 else { \ | |
353 if (UNLIKELY(needs_swap)) \ | |
354 S_reverse_copy((char *)(buf), cur, len); \ | |
355 else \ | |
356 Copy(buf, cur, len, char); \ | |
357 (cur) += (len); \ | |
358 } \ | |
359 } STMT_END | |
360 | |
361 #define GROWING(utf8, cat, start, cur, in_len) \ | |
362 STMT_START { \ | |
363 STRLEN glen = (in_len); \ | |
364 if (utf8) glen *= UTF8_EXPAND; \ | |
365 if ((cur) + glen >= (start) + SvLEN(cat)) { \ | |
366 (start) = sv_exp_grow(cat, glen); \ | |
367 (cur) = (start) + SvCUR(cat); \ | |
368 } \ | |
369 } STMT_END | |
370 | |
371 #define PUSH_GROWING_BYTES(utf8, cat, start, cur, buf, in_len) \ | |
372 STMT_START { \ | |
373 const STRLEN glen = (in_len); \ | |
374 STRLEN gl = glen; \ | |
375 if (utf8) gl *= UTF8_EXPAND; \ | |
376 if ((cur) + gl >= (start) + SvLEN(cat)) { \ | |
377 *cur = '\0'; \ | |
378 SvCUR_set((cat), (cur) - (start)); \ | |
379 (start) = sv_exp_grow(cat, gl); \ | |
380 (cur) = (start) + SvCUR(cat); \ | |
381 } \ | |
382 PUSH_BYTES(utf8, cur, buf, glen, 0); \ | |
383 } STMT_END | |
384 | |
385 #define PUSH_BYTE(utf8, s, byte) \ | |
386 STMT_START { \ | |
387 if (utf8) { \ | |
388 const U8 au8 = (byte); \ | |
389 (s) = my_bytes_to_utf8(&au8, 1, (s), 0);\ | |
390 } else *(U8 *)(s)++ = (byte); \ | |
391 } STMT_END | |
392 | |
393 /* Only to be used inside a loop (see the break) */ | |
394 #define NEXT_UNI_VAL(val, cur, str, end, utf8_flags) \ | |
395 STMT_START { \ | |
396 STRLEN retlen; \ | |
397 if (str >= end) break; \ | |
398 val = utf8n_to_uvchr((U8 *) str, end-str, &retlen, utf8_flags); \ | |
399 if (retlen == (STRLEN) -1 || retlen == 0) { \ | |
400 *cur = '\0'; \ | |
401 Perl_croak(aTHX_ "Malformed UTF-8 string in pack"); \ | |
402 } \ | |
403 str += retlen; \ | |
404 } STMT_END | |
405 | |
406 static const char *_action( const tempsym_t* symptr ) | |
407 { | |
408 return (const char *)(( symptr->flags & FLAG_PACK ) ? "pack" : "unpack"); | |
409 } | |
410 | |
411 /* Returns the sizeof() struct described by pat */ | |
412 STATIC I32 | |
413 S_measure_struct(pTHX_ tempsym_t* symptr) | |
414 { | |
415 I32 total = 0; | |
416 | |
417 PERL_ARGS_ASSERT_MEASURE_STRUCT; | |
418 | |
419 while (next_symbol(symptr)) { | |
420 I32 len; | |
421 int size; | |
422 | |
423 switch (symptr->howlen) { | |
424 case e_star: | |
425 Perl_croak(aTHX_ "Within []-length '*' not allowed in %s", | |
426 _action( symptr ) ); | |
427 | |
428 default: | |
429 /* e_no_len and e_number */ | |
430 len = symptr->length; | |
431 break; | |
432 } | |
433 | |
434 size = packprops[TYPE_NO_ENDIANNESS(symptr->code)] & PACK_SIZE_MASK; | |
435 if (!size) { | |
436 int star; | |
437 /* endianness doesn't influence the size of a type */ | |
438 switch(TYPE_NO_ENDIANNESS(symptr->code)) { | |
439 default: | |
440 Perl_croak(aTHX_ "Invalid type '%c' in %s", | |
441 (int)TYPE_NO_MODIFIERS(symptr->code), | |
442 _action( symptr ) ); | |
443 case '.' | TYPE_IS_SHRIEKING: | |
444 case '@' | TYPE_IS_SHRIEKING: | |
445 case '@': | |
446 case '.': | |
447 case '/': | |
448 case 'U': /* XXXX Is it correct? */ | |
449 case 'w': | |
450 case 'u': | |
451 Perl_croak(aTHX_ "Within []-length '%c' not allowed in %s", | |
452 (int) TYPE_NO_MODIFIERS(symptr->code), | |
453 _action( symptr ) ); | |
454 case '%': | |
455 size = 0; | |
456 break; | |
457 case '(': | |
458 { | |
459 tempsym_t savsym = *symptr; | |
460 symptr->patptr = savsym.grpbeg; | |
461 symptr->patend = savsym.grpend; | |
462 /* XXXX Theoretically, we need to measure many times at | |
463 different positions, since the subexpression may contain | |
464 alignment commands, but be not of aligned length. | |
465 Need to detect this and croak(). */ | |
466 size = measure_struct(symptr); | |
467 *symptr = savsym; | |
468 break; | |
469 } | |
470 case 'X' | TYPE_IS_SHRIEKING: | |
471 /* XXXX Is this useful? Then need to treat MEASURE_BACKWARDS. | |
472 */ | |
473 if (!len) /* Avoid division by 0 */ | |
474 len = 1; | |
475 len = total % len; /* Assumed: the start is aligned. */ | |
476 /* FALLTHROUGH */ | |
477 case 'X': | |
478 size = -1; | |
479 if (total < len) | |
480 Perl_croak(aTHX_ "'X' outside of string in %s", _action( symptr ) ); | |
481 break; | |
482 case 'x' | TYPE_IS_SHRIEKING: | |
483 if (!len) /* Avoid division by 0 */ | |
484 len = 1; | |
485 star = total % len; /* Assumed: the start is aligned. */ | |
486 if (star) /* Other portable ways? */ | |
487 len = len - star; | |
488 else | |
489 len = 0; | |
490 /* FALLTHROUGH */ | |
491 case 'x': | |
492 case 'A': | |
493 case 'Z': | |
494 case 'a': | |
495 size = 1; | |
496 break; | |
497 case 'B': | |
498 case 'b': | |
499 len = (len + 7)/8; | |
500 size = 1; | |
501 break; | |
502 case 'H': | |
503 case 'h': | |
504 len = (len + 1)/2; | |
505 size = 1; | |
506 break; | |
507 | |
508 case 'P': | |
509 len = 1; | |
510 size = sizeof(char*); | |
511 break; | |
512 } | |
513 } | |
514 total += len * size; | |
515 } | |
516 return total; | |
517 } | |
518 | |
519 | |
520 /* locate matching closing parenthesis or bracket | |
521 * returns char pointer to char after match, or NULL | |
522 */ | |
523 STATIC const char * | |
524 S_group_end(pTHX_ const char *patptr, const char *patend, char ender) | |
525 { | |
526 PERL_ARGS_ASSERT_GROUP_END; | |
527 | |
528 while (patptr < patend) { | |
529 const char c = *patptr++; | |
530 | |
531 if (isSPACE(c)) | |
532 continue; | |
533 else if (c == ender) | |
534 return patptr-1; | |
535 else if (c == '#') { | |
536 while (patptr < patend && *patptr != '\n') | |
537 patptr++; | |
538 continue; | |
539 } else if (c == '(') | |
540 patptr = group_end(patptr, patend, ')') + 1; | |
541 else if (c == '[') | |
542 patptr = group_end(patptr, patend, ']') + 1; | |
543 } | |
544 Perl_croak(aTHX_ "No group ending character '%c' found in template", | |
545 ender); | |
546 NOT_REACHED; /* NOTREACHED */ | |
547 } | |
548 | |
549 | |
550 /* Convert unsigned decimal number to binary. | |
551 * Expects a pointer to the first digit and address of length variable | |
552 * Advances char pointer to 1st non-digit char and returns number | |
553 */ | |
554 STATIC const char * | |
555 S_get_num(pTHX_ const char *patptr, I32 *lenptr ) | |
556 { | |
557 I32 len = *patptr++ - '0'; | |
558 | |
559 PERL_ARGS_ASSERT_GET_NUM; | |
560 | |
561 while (isDIGIT(*patptr)) { | |
562 if (len >= 0x7FFFFFFF/10) | |
563 Perl_croak(aTHX_ "pack/unpack repeat count overflow"); | |
564 len = (len * 10) + (*patptr++ - '0'); | |
565 } | |
566 *lenptr = len; | |
567 return patptr; | |
568 } | |
569 | |
570 /* The marvellous template parsing routine: Using state stored in *symptr, | |
571 * locates next template code and count | |
572 */ | |
573 STATIC bool | |
574 S_next_symbol(pTHX_ tempsym_t* symptr ) | |
575 { | |
576 const char* patptr = symptr->patptr; | |
577 const char* const patend = symptr->patend; | |
578 | |
579 PERL_ARGS_ASSERT_NEXT_SYMBOL; | |
580 | |
581 symptr->flags &= ~FLAG_SLASH; | |
582 | |
583 while (patptr < patend) { | |
584 if (isSPACE(*patptr)) | |
585 patptr++; | |
586 else if (*patptr == '#') { | |
587 patptr++; | |
588 while (patptr < patend && *patptr != '\n') | |
589 patptr++; | |
590 if (patptr < patend) | |
591 patptr++; | |
592 } else { | |
593 /* We should have found a template code */ | |
594 I32 code = *patptr++ & 0xFF; | |
595 U32 inherited_modifiers = 0; | |
596 | |
597 if (code == ','){ /* grandfather in commas but with a warning */ | |
598 if (((symptr->flags & FLAG_COMMA) == 0) && ckWARN(WARN_UNPACK)){ | |
599 symptr->flags |= FLAG_COMMA; | |
600 Perl_warner(aTHX_ packWARN(WARN_UNPACK), | |
601 "Invalid type ',' in %s", _action( symptr ) ); | |
602 } | |
603 continue; | |
604 } | |
605 | |
606 /* for '(', skip to ')' */ | |
607 if (code == '(') { | |
608 if( isDIGIT(*patptr) || *patptr == '*' || *patptr == '[' ) | |
609 Perl_croak(aTHX_ "()-group starts with a count in %s", | |
610 _action( symptr ) ); | |
611 symptr->grpbeg = patptr; | |
612 patptr = 1 + ( symptr->grpend = group_end(patptr, patend, ')') ); | |
613 if( symptr->level >= MAX_SUB_TEMPLATE_LEVEL ) | |
614 Perl_croak(aTHX_ "Too deeply nested ()-groups in %s", | |
615 _action( symptr ) ); | |
616 } | |
617 | |
618 /* look for group modifiers to inherit */ | |
619 if (TYPE_ENDIANNESS(symptr->flags)) { | |
620 if (strchr(ENDIANNESS_ALLOWED_TYPES, TYPE_NO_MODIFIERS(code))) | |
621 inherited_modifiers |= TYPE_ENDIANNESS(symptr->flags); | |
622 } | |
623 | |
624 /* look for modifiers */ | |
625 while (patptr < patend) { | |
626 const char *allowed; | |
627 I32 modifier; | |
628 switch (*patptr) { | |
629 case '!': | |
630 modifier = TYPE_IS_SHRIEKING; | |
631 allowed = "sSiIlLxXnNvV@."; | |
632 break; | |
633 case '>': | |
634 modifier = TYPE_IS_BIG_ENDIAN; | |
635 allowed = ENDIANNESS_ALLOWED_TYPES; | |
636 break; | |
637 case '<': | |
638 modifier = TYPE_IS_LITTLE_ENDIAN; | |
639 allowed = ENDIANNESS_ALLOWED_TYPES; | |
640 break; | |
641 default: | |
642 allowed = ""; | |
643 modifier = 0; | |
644 break; | |
645 } | |
646 | |
647 if (modifier == 0) | |
648 break; | |
649 | |
650 if (!strchr(allowed, TYPE_NO_MODIFIERS(code))) | |
651 Perl_croak(aTHX_ "'%c' allowed only after types %s in %s", *patptr, | |
652 allowed, _action( symptr ) ); | |
653 | |
654 if (TYPE_ENDIANNESS(code | modifier) == TYPE_ENDIANNESS_MASK) | |
655 Perl_croak(aTHX_ "Can't use both '<' and '>' after type '%c' in %s", | |
656 (int) TYPE_NO_MODIFIERS(code), _action( symptr ) ); | |
657 else if (TYPE_ENDIANNESS(code | modifier | inherited_modifiers) == | |
658 TYPE_ENDIANNESS_MASK) | |
659 Perl_croak(aTHX_ "Can't use '%c' in a group with different byte-order in %s", | |
660 *patptr, _action( symptr ) ); | |
661 | |
662 if ((code & modifier)) { | |
663 Perl_ck_warner(aTHX_ packWARN(WARN_UNPACK), | |
664 "Duplicate modifier '%c' after '%c' in %s", | |
665 *patptr, (int) TYPE_NO_MODIFIERS(code), | |
666 _action( symptr ) ); | |
667 } | |
668 | |
669 code |= modifier; | |
670 patptr++; | |
671 } | |
672 | |
673 /* inherit modifiers */ | |
674 code |= inherited_modifiers; | |
675 | |
676 /* look for count and/or / */ | |
677 if (patptr < patend) { | |
678 if (isDIGIT(*patptr)) { | |
679 patptr = get_num( patptr, &symptr->length ); | |
680 symptr->howlen = e_number; | |
681 | |
682 } else if (*patptr == '*') { | |
683 patptr++; | |
684 symptr->howlen = e_star; | |
685 | |
686 } else if (*patptr == '[') { | |
687 const char* lenptr = ++patptr; | |
688 symptr->howlen = e_number; | |
689 patptr = group_end( patptr, patend, ']' ) + 1; | |
690 /* what kind of [] is it? */ | |
691 if (isDIGIT(*lenptr)) { | |
692 lenptr = get_num( lenptr, &symptr->length ); | |
693 if( *lenptr != ']' ) | |
694 Perl_croak(aTHX_ "Malformed integer in [] in %s", | |
695 _action( symptr ) ); | |
696 } else { | |
697 tempsym_t savsym = *symptr; | |
698 symptr->patend = patptr-1; | |
699 symptr->patptr = lenptr; | |
700 savsym.length = measure_struct(symptr); | |
701 *symptr = savsym; | |
702 } | |
703 } else { | |
704 symptr->howlen = e_no_len; | |
705 symptr->length = 1; | |
706 } | |
707 | |
708 /* try to find / */ | |
709 while (patptr < patend) { | |
710 if (isSPACE(*patptr)) | |
711 patptr++; | |
712 else if (*patptr == '#') { | |
713 patptr++; | |
714 while (patptr < patend && *patptr != '\n') | |
715 patptr++; | |
716 if (patptr < patend) | |
717 patptr++; | |
718 } else { | |
719 if (*patptr == '/') { | |
720 symptr->flags |= FLAG_SLASH; | |
721 patptr++; | |
722 if (patptr < patend && | |
723 (isDIGIT(*patptr) || *patptr == '*' || *patptr == '[')) | |
724 Perl_croak(aTHX_ "'/' does not take a repeat count in %s", | |
725 _action( symptr ) ); | |
726 } | |
727 break; | |
728 } | |
729 } | |
730 } else { | |
731 /* at end - no count, no / */ | |
732 symptr->howlen = e_no_len; | |
733 symptr->length = 1; | |
734 } | |
735 | |
736 symptr->code = code; | |
737 symptr->patptr = patptr; | |
738 return TRUE; | |
739 } | |
740 } | |
741 symptr->patptr = patptr; | |
742 return FALSE; | |
743 } | |
744 | |
745 /* | |
746 There is no way to cleanly handle the case where we should process the | |
747 string per byte in its upgraded form while it's really in downgraded form | |
748 (e.g. estimates like strend-s as an upper bound for the number of | |
749 characters left wouldn't work). So if we foresee the need of this | |
750 (pattern starts with U or contains U0), we want to work on the encoded | |
751 version of the string. Users are advised to upgrade their pack string | |
752 themselves if they need to do a lot of unpacks like this on it | |
753 */ | |
754 STATIC bool | |
755 need_utf8(const char *pat, const char *patend) | |
756 { | |
757 bool first = TRUE; | |
758 | |
759 PERL_ARGS_ASSERT_NEED_UTF8; | |
760 | |
761 while (pat < patend) { | |
762 if (pat[0] == '#') { | |
763 pat++; | |
764 pat = (const char *) memchr(pat, '\n', patend-pat); | |
765 if (!pat) return FALSE; | |
766 } else if (pat[0] == 'U') { | |
767 if (first || pat[1] == '0') return TRUE; | |
768 } else first = FALSE; | |
769 pat++; | |
770 } | |
771 return FALSE; | |
772 } | |
773 | |
774 STATIC char | |
775 first_symbol(const char *pat, const char *patend) { | |
776 PERL_ARGS_ASSERT_FIRST_SYMBOL; | |
777 | |
778 while (pat < patend) { | |
779 if (pat[0] != '#') return pat[0]; | |
780 pat++; | |
781 pat = (const char *) memchr(pat, '\n', patend-pat); | |
782 if (!pat) return 0; | |
783 pat++; | |
784 } | |
785 return 0; | |
786 } | |
787 | |
788 /* | |
789 | |
790 =head1 Pack and Unpack | |
791 | |
792 =for apidoc unpackstring | |
793 | |
794 The engine implementing the unpack() Perl function. | |
795 | |
796 Using the template pat..patend, this function unpacks the string | |
797 s..strend into a number of mortal SVs, which it pushes onto the perl | |
798 argument (@_) stack (so you will need to issue a C<PUTBACK> before and | |
799 C<SPAGAIN> after the call to this function). It returns the number of | |
800 pushed elements. | |
801 | |
802 The strend and patend pointers should point to the byte following the last | |
803 character of each string. | |
804 | |
805 Although this function returns its values on the perl argument stack, it | |
806 doesn't take any parameters from that stack (and thus in particular | |
807 there's no need to do a PUSHMARK before calling it, unlike L</call_pv> for | |
808 example). | |
809 | |
810 =cut */ | |
811 | |
812 I32 | |
813 Perl_unpackstring(pTHX_ const char *pat, const char *patend, const char *s, const char *strend, U32 flags) | |
814 { | |
815 tempsym_t sym; | |
816 | |
817 PERL_ARGS_ASSERT_UNPACKSTRING; | |
818 | |
819 if (flags & FLAG_DO_UTF8) flags |= FLAG_WAS_UTF8; | |
820 else if (need_utf8(pat, patend)) { | |
821 /* We probably should try to avoid this in case a scalar context call | |
822 wouldn't get to the "U0" */ | |
823 STRLEN len = strend - s; | |
824 s = (char *) bytes_to_utf8((U8 *) s, &len); | |
825 SAVEFREEPV(s); | |
826 strend = s + len; | |
827 flags |= FLAG_DO_UTF8; | |
828 } | |
829 | |
830 if (first_symbol(pat, patend) != 'U' && (flags & FLAG_DO_UTF8)) | |
831 flags |= FLAG_PARSE_UTF8; | |
832 | |
833 TEMPSYM_INIT(&sym, pat, patend, flags); | |
834 | |
835 return unpack_rec(&sym, s, s, strend, NULL ); | |
836 } | |
837 | |
838 STATIC I32 | |
839 S_unpack_rec(pTHX_ tempsym_t* symptr, const char *s, const char *strbeg, const char *strend, const char **new_s ) | |
840 { | |
841 dSP; | |
842 SV *sv = NULL; | |
843 const I32 start_sp_offset = SP - PL_stack_base; | |
844 howlen_t howlen; | |
845 I32 checksum = 0; | |
846 UV cuv = 0; | |
847 NV cdouble = 0.0; | |
848 const int bits_in_uv = CHAR_BIT * sizeof(cuv); | |
849 bool beyond = FALSE; | |
850 bool explicit_length; | |
851 const bool unpack_only_one = (symptr->flags & FLAG_UNPACK_ONLY_ONE) != 0; | |
852 bool utf8 = (symptr->flags & FLAG_PARSE_UTF8) ? 1 : 0; | |
853 | |
854 PERL_ARGS_ASSERT_UNPACK_REC; | |
855 | |
856 symptr->strbeg = s - strbeg; | |
857 | |
858 while (next_symbol(symptr)) { | |
859 packprops_t props; | |
860 I32 len; | |
861 I32 datumtype = symptr->code; | |
862 bool needs_swap; | |
863 /* do first one only unless in list context | |
864 / is implemented by unpacking the count, then popping it from the | |
865 stack, so must check that we're not in the middle of a / */ | |
866 if ( unpack_only_one | |
867 && (SP - PL_stack_base == start_sp_offset + 1) | |
868 && (datumtype != '/') ) /* XXX can this be omitted */ | |
869 break; | |
870 | |
871 switch (howlen = symptr->howlen) { | |
872 case e_star: | |
873 len = strend - strbeg; /* long enough */ | |
874 break; | |
875 default: | |
876 /* e_no_len and e_number */ | |
877 len = symptr->length; | |
878 break; | |
879 } | |
880 | |
881 explicit_length = TRUE; | |
882 redo_switch: | |
883 beyond = s >= strend; | |
884 | |
885 props = packprops[TYPE_NO_ENDIANNESS(datumtype)]; | |
886 if (props) { | |
887 /* props nonzero means we can process this letter. */ | |
888 const long size = props & PACK_SIZE_MASK; | |
889 const long howmany = (strend - s) / size; | |
890 if (len > howmany) | |
891 len = howmany; | |
892 | |
893 if (!checksum || (props & PACK_SIZE_CANNOT_CSUM)) { | |
894 if (len && unpack_only_one) len = 1; | |
895 EXTEND(SP, len); | |
896 EXTEND_MORTAL(len); | |
897 } | |
898 } | |
899 | |
900 needs_swap = NEEDS_SWAP(datumtype); | |
901 | |
902 switch(TYPE_NO_ENDIANNESS(datumtype)) { | |
903 default: | |
904 Perl_croak(aTHX_ "Invalid type '%c' in unpack", (int)TYPE_NO_MODIFIERS(datumtype) ); | |
905 | |
906 case '%': | |
907 if (howlen == e_no_len) | |
908 len = 16; /* len is not specified */ | |
909 checksum = len; | |
910 cuv = 0; | |
911 cdouble = 0; | |
912 continue; | |
913 | |
914 case '(': | |
915 { | |
916 tempsym_t savsym = *symptr; | |
917 const U32 group_modifiers = TYPE_MODIFIERS(datumtype & ~symptr->flags); | |
918 symptr->flags |= group_modifiers; | |
919 symptr->patend = savsym.grpend; | |
920 symptr->previous = &savsym; | |
921 symptr->level++; | |
922 PUTBACK; | |
923 if (len && unpack_only_one) len = 1; | |
924 while (len--) { | |
925 symptr->patptr = savsym.grpbeg; | |
926 if (utf8) symptr->flags |= FLAG_PARSE_UTF8; | |
927 else symptr->flags &= ~FLAG_PARSE_UTF8; | |
928 unpack_rec(symptr, s, strbeg, strend, &s); | |
929 if (s == strend && savsym.howlen == e_star) | |
930 break; /* No way to continue */ | |
931 } | |
932 SPAGAIN; | |
933 savsym.flags = symptr->flags & ~group_modifiers; | |
934 *symptr = savsym; | |
935 break; | |
936 } | |
937 case '.' | TYPE_IS_SHRIEKING: | |
938 case '.': { | |
939 const char *from; | |
940 SV *sv; | |
941 const bool u8 = utf8 && !(datumtype & TYPE_IS_SHRIEKING); | |
942 if (howlen == e_star) from = strbeg; | |
943 else if (len <= 0) from = s; | |
944 else { | |
945 tempsym_t *group = symptr; | |
946 | |
947 while (--len && group) group = group->previous; | |
948 from = group ? strbeg + group->strbeg : strbeg; | |
949 } | |
950 sv = from <= s ? | |
951 newSVuv( u8 ? (UV) utf8_length((const U8*)from, (const U8*)s) : (UV) (s-from)) : | |
952 newSViv(-(u8 ? (IV) utf8_length((const U8*)s, (const U8*)from) : (IV) (from-s))); | |
953 mXPUSHs(sv); | |
954 break; | |
955 } | |
956 case '@' | TYPE_IS_SHRIEKING: | |
957 case '@': | |
958 s = strbeg + symptr->strbeg; | |
959 if (utf8 && !(datumtype & TYPE_IS_SHRIEKING)) | |
960 { | |
961 while (len > 0) { | |
962 if (s >= strend) | |
963 Perl_croak(aTHX_ "'@' outside of string in unpack"); | |
964 s += UTF8SKIP(s); | |
965 len--; | |
966 } | |
967 if (s > strend) | |
968 Perl_croak(aTHX_ "'@' outside of string with malformed UTF-8 in unpack"); | |
969 } else { | |
970 if (strend-s < len) | |
971 Perl_croak(aTHX_ "'@' outside of string in unpack"); | |
972 s += len; | |
973 } | |
974 break; | |
975 case 'X' | TYPE_IS_SHRIEKING: | |
976 if (!len) /* Avoid division by 0 */ | |
977 len = 1; | |
978 if (utf8) { | |
979 const char *hop, *last; | |
980 I32 l = len; | |
981 hop = last = strbeg; | |
982 while (hop < s) { | |
983 hop += UTF8SKIP(hop); | |
984 if (--l == 0) { | |
985 last = hop; | |
986 l = len; | |
987 } | |
988 } | |
989 if (last > s) | |
990 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
991 s = last; | |
992 break; | |
993 } | |
994 len = (s - strbeg) % len; | |
995 /* FALLTHROUGH */ | |
996 case 'X': | |
997 if (utf8) { | |
998 while (len > 0) { | |
999 if (s <= strbeg) | |
1000 Perl_croak(aTHX_ "'X' outside of string in unpack"); | |
1001 while (--s, UTF8_IS_CONTINUATION(*s)) { | |
1002 if (s <= strbeg) | |
1003 Perl_croak(aTHX_ "'X' outside of string in unpack"); | |
1004 } | |
1005 len--; | |
1006 } | |
1007 } else { | |
1008 if (len > s - strbeg) | |
1009 Perl_croak(aTHX_ "'X' outside of string in unpack" ); | |
1010 s -= len; | |
1011 } | |
1012 break; | |
1013 case 'x' | TYPE_IS_SHRIEKING: { | |
1014 I32 ai32; | |
1015 if (!len) /* Avoid division by 0 */ | |
1016 len = 1; | |
1017 if (utf8) ai32 = utf8_length((U8 *) strbeg, (U8 *) s) % len; | |
1018 else ai32 = (s - strbeg) % len; | |
1019 if (ai32 == 0) break; | |
1020 len -= ai32; | |
1021 } | |
1022 /* FALLTHROUGH */ | |
1023 case 'x': | |
1024 if (utf8) { | |
1025 while (len>0) { | |
1026 if (s >= strend) | |
1027 Perl_croak(aTHX_ "'x' outside of string in unpack"); | |
1028 s += UTF8SKIP(s); | |
1029 len--; | |
1030 } | |
1031 } else { | |
1032 if (len > strend - s) | |
1033 Perl_croak(aTHX_ "'x' outside of string in unpack"); | |
1034 s += len; | |
1035 } | |
1036 break; | |
1037 case '/': | |
1038 Perl_croak(aTHX_ "'/' must follow a numeric type in unpack"); | |
1039 | |
1040 case 'A': | |
1041 case 'Z': | |
1042 case 'a': | |
1043 if (checksum) { | |
1044 /* Preliminary length estimate is assumed done in 'W' */ | |
1045 if (len > strend - s) len = strend - s; | |
1046 goto W_checksum; | |
1047 } | |
1048 if (utf8) { | |
1049 I32 l; | |
1050 const char *hop; | |
1051 for (l=len, hop=s; l>0; l--, hop += UTF8SKIP(hop)) { | |
1052 if (hop >= strend) { | |
1053 if (hop > strend) | |
1054 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1055 break; | |
1056 } | |
1057 } | |
1058 if (hop > strend) | |
1059 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1060 len = hop - s; | |
1061 } else if (len > strend - s) | |
1062 len = strend - s; | |
1063 | |
1064 if (datumtype == 'Z') { | |
1065 /* 'Z' strips stuff after first null */ | |
1066 const char *ptr, *end; | |
1067 end = s + len; | |
1068 for (ptr = s; ptr < end; ptr++) if (*ptr == 0) break; | |
1069 sv = newSVpvn(s, ptr-s); | |
1070 if (howlen == e_star) /* exact for 'Z*' */ | |
1071 len = ptr-s + (ptr != strend ? 1 : 0); | |
1072 } else if (datumtype == 'A') { | |
1073 /* 'A' strips both nulls and spaces */ | |
1074 const char *ptr; | |
1075 if (utf8 && (symptr->flags & FLAG_WAS_UTF8)) { | |
1076 for (ptr = s+len-1; ptr >= s; ptr--) | |
1077 if (*ptr != 0 && !UTF8_IS_CONTINUATION(*ptr) && | |
1078 !isSPACE_utf8(ptr)) break; | |
1079 if (ptr >= s) ptr += UTF8SKIP(ptr); | |
1080 else ptr++; | |
1081 if (ptr > s+len) | |
1082 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1083 } else { | |
1084 for (ptr = s+len-1; ptr >= s; ptr--) | |
1085 if (*ptr != 0 && !isSPACE(*ptr)) break; | |
1086 ptr++; | |
1087 } | |
1088 sv = newSVpvn(s, ptr-s); | |
1089 } else sv = newSVpvn(s, len); | |
1090 | |
1091 if (utf8) { | |
1092 SvUTF8_on(sv); | |
1093 /* Undo any upgrade done due to need_utf8() */ | |
1094 if (!(symptr->flags & FLAG_WAS_UTF8)) | |
1095 sv_utf8_downgrade(sv, 0); | |
1096 } | |
1097 mXPUSHs(sv); | |
1098 s += len; | |
1099 break; | |
1100 case 'B': | |
1101 case 'b': { | |
1102 char *str; | |
1103 if (howlen == e_star || len > (strend - s) * 8) | |
1104 len = (strend - s) * 8; | |
1105 if (checksum) { | |
1106 if (utf8) | |
1107 while (len >= 8 && s < strend) { | |
1108 cuv += PL_bitcount[utf8_to_byte(aTHX_ &s, strend, datumtype)]; | |
1109 len -= 8; | |
1110 } | |
1111 else | |
1112 while (len >= 8) { | |
1113 cuv += PL_bitcount[*(U8 *)s++]; | |
1114 len -= 8; | |
1115 } | |
1116 if (len && s < strend) { | |
1117 U8 bits; | |
1118 bits = SHIFT_BYTE(utf8, s, strend, datumtype); | |
1119 if (datumtype == 'b') | |
1120 while (len-- > 0) { | |
1121 if (bits & 1) cuv++; | |
1122 bits >>= 1; | |
1123 } | |
1124 else | |
1125 while (len-- > 0) { | |
1126 if (bits & 0x80) cuv++; | |
1127 bits <<= 1; | |
1128 } | |
1129 } | |
1130 break; | |
1131 } | |
1132 | |
1133 sv = sv_2mortal(newSV(len ? len : 1)); | |
1134 SvPOK_on(sv); | |
1135 str = SvPVX(sv); | |
1136 if (datumtype == 'b') { | |
1137 U8 bits = 0; | |
1138 const I32 ai32 = len; | |
1139 for (len = 0; len < ai32; len++) { | |
1140 if (len & 7) bits >>= 1; | |
1141 else if (utf8) { | |
1142 if (s >= strend) break; | |
1143 bits = utf8_to_byte(aTHX_ &s, strend, datumtype); | |
1144 } else bits = *(U8 *) s++; | |
1145 *str++ = bits & 1 ? '1' : '0'; | |
1146 } | |
1147 } else { | |
1148 U8 bits = 0; | |
1149 const I32 ai32 = len; | |
1150 for (len = 0; len < ai32; len++) { | |
1151 if (len & 7) bits <<= 1; | |
1152 else if (utf8) { | |
1153 if (s >= strend) break; | |
1154 bits = utf8_to_byte(aTHX_ &s, strend, datumtype); | |
1155 } else bits = *(U8 *) s++; | |
1156 *str++ = bits & 0x80 ? '1' : '0'; | |
1157 } | |
1158 } | |
1159 *str = '\0'; | |
1160 SvCUR_set(sv, str - SvPVX_const(sv)); | |
1161 XPUSHs(sv); | |
1162 break; | |
1163 } | |
1164 case 'H': | |
1165 case 'h': { | |
1166 char *str = NULL; | |
1167 /* Preliminary length estimate, acceptable for utf8 too */ | |
1168 if (howlen == e_star || len > (strend - s) * 2) | |
1169 len = (strend - s) * 2; | |
1170 if (!checksum) { | |
1171 sv = sv_2mortal(newSV(len ? len : 1)); | |
1172 SvPOK_on(sv); | |
1173 str = SvPVX(sv); | |
1174 } | |
1175 if (datumtype == 'h') { | |
1176 U8 bits = 0; | |
1177 I32 ai32 = len; | |
1178 for (len = 0; len < ai32; len++) { | |
1179 if (len & 1) bits >>= 4; | |
1180 else if (utf8) { | |
1181 if (s >= strend) break; | |
1182 bits = utf8_to_byte(aTHX_ &s, strend, datumtype); | |
1183 } else bits = * (U8 *) s++; | |
1184 if (!checksum) | |
1185 *str++ = PL_hexdigit[bits & 15]; | |
1186 } | |
1187 } else { | |
1188 U8 bits = 0; | |
1189 const I32 ai32 = len; | |
1190 for (len = 0; len < ai32; len++) { | |
1191 if (len & 1) bits <<= 4; | |
1192 else if (utf8) { | |
1193 if (s >= strend) break; | |
1194 bits = utf8_to_byte(aTHX_ &s, strend, datumtype); | |
1195 } else bits = *(U8 *) s++; | |
1196 if (!checksum) | |
1197 *str++ = PL_hexdigit[(bits >> 4) & 15]; | |
1198 } | |
1199 } | |
1200 if (!checksum) { | |
1201 *str = '\0'; | |
1202 SvCUR_set(sv, str - SvPVX_const(sv)); | |
1203 XPUSHs(sv); | |
1204 } | |
1205 break; | |
1206 } | |
1207 case 'C': | |
1208 if (len == 0) { | |
1209 if (explicit_length) | |
1210 /* Switch to "character" mode */ | |
1211 utf8 = (symptr->flags & FLAG_DO_UTF8) ? 1 : 0; | |
1212 break; | |
1213 } | |
1214 /* FALLTHROUGH */ | |
1215 case 'c': | |
1216 while (len-- > 0 && s < strend) { | |
1217 int aint; | |
1218 if (utf8) | |
1219 { | |
1220 STRLEN retlen; | |
1221 aint = utf8n_to_uvchr((U8 *) s, strend-s, &retlen, | |
1222 ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); | |
1223 if (retlen == (STRLEN) -1 || retlen == 0) | |
1224 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1225 s += retlen; | |
1226 } | |
1227 else | |
1228 aint = *(U8 *)(s)++; | |
1229 if (aint >= 128 && datumtype != 'C') /* fake up signed chars */ | |
1230 aint -= 256; | |
1231 if (!checksum) | |
1232 mPUSHi(aint); | |
1233 else if (checksum > bits_in_uv) | |
1234 cdouble += (NV)aint; | |
1235 else | |
1236 cuv += aint; | |
1237 } | |
1238 break; | |
1239 case 'W': | |
1240 W_checksum: | |
1241 if (utf8) { | |
1242 while (len-- > 0 && s < strend) { | |
1243 STRLEN retlen; | |
1244 const UV val = utf8n_to_uvchr((U8 *) s, strend-s, &retlen, | |
1245 ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); | |
1246 if (retlen == (STRLEN) -1 || retlen == 0) | |
1247 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1248 s += retlen; | |
1249 if (!checksum) | |
1250 mPUSHu(val); | |
1251 else if (checksum > bits_in_uv) | |
1252 cdouble += (NV) val; | |
1253 else | |
1254 cuv += val; | |
1255 } | |
1256 } else if (!checksum) | |
1257 while (len-- > 0) { | |
1258 const U8 ch = *(U8 *) s++; | |
1259 mPUSHu(ch); | |
1260 } | |
1261 else if (checksum > bits_in_uv) | |
1262 while (len-- > 0) cdouble += (NV) *(U8 *) s++; | |
1263 else | |
1264 while (len-- > 0) cuv += *(U8 *) s++; | |
1265 break; | |
1266 case 'U': | |
1267 if (len == 0) { | |
1268 if (explicit_length && howlen != e_star) { | |
1269 /* Switch to "bytes in UTF-8" mode */ | |
1270 if (symptr->flags & FLAG_DO_UTF8) utf8 = 0; | |
1271 else | |
1272 /* Should be impossible due to the need_utf8() test */ | |
1273 Perl_croak(aTHX_ "U0 mode on a byte string"); | |
1274 } | |
1275 break; | |
1276 } | |
1277 if (len > strend - s) len = strend - s; | |
1278 if (!checksum) { | |
1279 if (len && unpack_only_one) len = 1; | |
1280 EXTEND(SP, len); | |
1281 EXTEND_MORTAL(len); | |
1282 } | |
1283 while (len-- > 0 && s < strend) { | |
1284 STRLEN retlen; | |
1285 UV auv; | |
1286 if (utf8) { | |
1287 U8 result[UTF8_MAXLEN]; | |
1288 const char *ptr = s; | |
1289 STRLEN len; | |
1290 /* Bug: warns about bad utf8 even if we are short on bytes | |
1291 and will break out of the loop */ | |
1292 if (!S_utf8_to_bytes(aTHX_ &ptr, strend, (char *) result, 1, | |
1293 'U')) | |
1294 break; | |
1295 len = UTF8SKIP(result); | |
1296 if (!S_utf8_to_bytes(aTHX_ &ptr, strend, | |
1297 (char *) &result[1], len-1, 'U')) break; | |
1298 auv = NATIVE_TO_UNI(utf8n_to_uvchr(result, | |
1299 len, | |
1300 &retlen, | |
1301 UTF8_ALLOW_DEFAULT)); | |
1302 s = ptr; | |
1303 } else { | |
1304 auv = NATIVE_TO_UNI(utf8n_to_uvchr((U8*)s, | |
1305 strend - s, | |
1306 &retlen, | |
1307 UTF8_ALLOW_DEFAULT)); | |
1308 if (retlen == (STRLEN) -1 || retlen == 0) | |
1309 Perl_croak(aTHX_ "Malformed UTF-8 string in unpack"); | |
1310 s += retlen; | |
1311 } | |
1312 if (!checksum) | |
1313 mPUSHu(auv); | |
1314 else if (checksum > bits_in_uv) | |
1315 cdouble += (NV) auv; | |
1316 else | |
1317 cuv += auv; | |
1318 } | |
1319 break; | |
1320 case 's' | TYPE_IS_SHRIEKING: | |
1321 #if SHORTSIZE != SIZE16 | |
1322 while (len-- > 0) { | |
1323 short ashort; | |
1324 SHIFT_VAR(utf8, s, strend, ashort, datumtype, needs_swap); | |
1325 if (!checksum) | |
1326 mPUSHi(ashort); | |
1327 else if (checksum > bits_in_uv) | |
1328 cdouble += (NV)ashort; | |
1329 else | |
1330 cuv += ashort; | |
1331 } | |
1332 break; | |
1333 #else | |
1334 /* FALLTHROUGH */ | |
1335 #endif | |
1336 case 's': | |
1337 while (len-- > 0) { | |
1338 I16 ai16; | |
1339 | |
1340 #if U16SIZE > SIZE16 | |
1341 ai16 = 0; | |
1342 #endif | |
1343 SHIFT16(utf8, s, strend, &ai16, datumtype, needs_swap); | |
1344 #if U16SIZE > SIZE16 | |
1345 if (ai16 > 32767) | |
1346 ai16 -= 65536; | |
1347 #endif | |
1348 if (!checksum) | |
1349 mPUSHi(ai16); | |
1350 else if (checksum > bits_in_uv) | |
1351 cdouble += (NV)ai16; | |
1352 else | |
1353 cuv += ai16; | |
1354 } | |
1355 break; | |
1356 case 'S' | TYPE_IS_SHRIEKING: | |
1357 #if SHORTSIZE != SIZE16 | |
1358 while (len-- > 0) { | |
1359 unsigned short aushort; | |
1360 SHIFT_VAR(utf8, s, strend, aushort, datumtype, needs_swap, | |
1361 needs_swap); | |
1362 if (!checksum) | |
1363 mPUSHu(aushort); | |
1364 else if (checksum > bits_in_uv) | |
1365 cdouble += (NV)aushort; | |
1366 else | |
1367 cuv += aushort; | |
1368 } | |
1369 break; | |
1370 #else | |
1371 /* FALLTHROUGH */ | |
1372 #endif | |
1373 case 'v': | |
1374 case 'n': | |
1375 case 'S': | |
1376 while (len-- > 0) { | |
1377 U16 au16; | |
1378 #if U16SIZE > SIZE16 | |
1379 au16 = 0; | |
1380 #endif | |
1381 SHIFT16(utf8, s, strend, &au16, datumtype, needs_swap); | |
1382 if (datumtype == 'n') | |
1383 au16 = PerlSock_ntohs(au16); | |
1384 if (datumtype == 'v') | |
1385 au16 = vtohs(au16); | |
1386 if (!checksum) | |
1387 mPUSHu(au16); | |
1388 else if (checksum > bits_in_uv) | |
1389 cdouble += (NV) au16; | |
1390 else | |
1391 cuv += au16; | |
1392 } | |
1393 break; | |
1394 case 'v' | TYPE_IS_SHRIEKING: | |
1395 case 'n' | TYPE_IS_SHRIEKING: | |
1396 while (len-- > 0) { | |
1397 I16 ai16; | |
1398 # if U16SIZE > SIZE16 | |
1399 ai16 = 0; | |
1400 # endif | |
1401 SHIFT16(utf8, s, strend, &ai16, datumtype, needs_swap); | |
1402 /* There should never be any byte-swapping here. */ | |
1403 assert(!TYPE_ENDIANNESS(datumtype)); | |
1404 if (datumtype == ('n' | TYPE_IS_SHRIEKING)) | |
1405 ai16 = (I16) PerlSock_ntohs((U16) ai16); | |
1406 if (datumtype == ('v' | TYPE_IS_SHRIEKING)) | |
1407 ai16 = (I16) vtohs((U16) ai16); | |
1408 if (!checksum) | |
1409 mPUSHi(ai16); | |
1410 else if (checksum > bits_in_uv) | |
1411 cdouble += (NV) ai16; | |
1412 else | |
1413 cuv += ai16; | |
1414 } | |
1415 break; | |
1416 case 'i': | |
1417 case 'i' | TYPE_IS_SHRIEKING: | |
1418 while (len-- > 0) { | |
1419 int aint; | |
1420 SHIFT_VAR(utf8, s, strend, aint, datumtype, needs_swap); | |
1421 if (!checksum) | |
1422 mPUSHi(aint); | |
1423 else if (checksum > bits_in_uv) | |
1424 cdouble += (NV)aint; | |
1425 else | |
1426 cuv += aint; | |
1427 } | |
1428 break; | |
1429 case 'I': | |
1430 case 'I' | TYPE_IS_SHRIEKING: | |
1431 while (len-- > 0) { | |
1432 unsigned int auint; | |
1433 SHIFT_VAR(utf8, s, strend, auint, datumtype, needs_swap); | |
1434 if (!checksum) | |
1435 mPUSHu(auint); | |
1436 else if (checksum > bits_in_uv) | |
1437 cdouble += (NV)auint; | |
1438 else | |
1439 cuv += auint; | |
1440 } | |
1441 break; | |
1442 case 'j': | |
1443 while (len-- > 0) { | |
1444 IV aiv; | |
1445 SHIFT_VAR(utf8, s, strend, aiv, datumtype, needs_swap); | |
1446 if (!checksum) | |
1447 mPUSHi(aiv); | |
1448 else if (checksum > bits_in_uv) | |
1449 cdouble += (NV)aiv; | |
1450 else | |
1451 cuv += aiv; | |
1452 } | |
1453 break; | |
1454 case 'J': | |
1455 while (len-- > 0) { | |
1456 UV auv; | |
1457 SHIFT_VAR(utf8, s, strend, auv, datumtype, needs_swap); | |
1458 if (!checksum) | |
1459 mPUSHu(auv); | |
1460 else if (checksum > bits_in_uv) | |
1461 cdouble += (NV)auv; | |
1462 else | |
1463 cuv += auv; | |
1464 } | |
1465 break; | |
1466 case 'l' | TYPE_IS_SHRIEKING: | |
1467 #if LONGSIZE != SIZE32 | |
1468 while (len-- > 0) { | |
1469 long along; | |
1470 SHIFT_VAR(utf8, s, strend, along, datumtype, needs_swap); | |
1471 if (!checksum) | |
1472 mPUSHi(along); | |
1473 else if (checksum > bits_in_uv) | |
1474 cdouble += (NV)along; | |
1475 else | |
1476 cuv += along; | |
1477 } | |
1478 break; | |
1479 #else | |
1480 /* FALLTHROUGH */ | |
1481 #endif | |
1482 case 'l': | |
1483 while (len-- > 0) { | |
1484 I32 ai32; | |
1485 #if U32SIZE > SIZE32 | |
1486 ai32 = 0; | |
1487 #endif | |
1488 SHIFT32(utf8, s, strend, &ai32, datumtype, needs_swap); | |
1489 #if U32SIZE > SIZE32 | |
1490 if (ai32 > 2147483647) ai32 -= 4294967296; | |
1491 #endif | |
1492 if (!checksum) | |
1493 mPUSHi(ai32); | |
1494 else if (checksum > bits_in_uv) | |
1495 cdouble += (NV)ai32; | |
1496 else | |
1497 cuv += ai32; | |
1498 } | |
1499 break; | |
1500 case 'L' | TYPE_IS_SHRIEKING: | |
1501 #if LONGSIZE != SIZE32 | |
1502 while (len-- > 0) { | |
1503 unsigned long aulong; | |
1504 SHIFT_VAR(utf8, s, strend, aulong, datumtype, needs_swap); | |
1505 if (!checksum) | |
1506 mPUSHu(aulong); | |
1507 else if (checksum > bits_in_uv) | |
1508 cdouble += (NV)aulong; | |
1509 else | |
1510 cuv += aulong; | |
1511 } | |
1512 break; | |
1513 #else | |
1514 /* FALLTHROUGH */ | |
1515 #endif | |
1516 case 'V': | |
1517 case 'N': | |
1518 case 'L': | |
1519 while (len-- > 0) { | |
1520 U32 au32; | |
1521 #if U32SIZE > SIZE32 | |
1522 au32 = 0; | |
1523 #endif | |
1524 SHIFT32(utf8, s, strend, &au32, datumtype, needs_swap); | |
1525 if (datumtype == 'N') | |
1526 au32 = PerlSock_ntohl(au32); | |
1527 if (datumtype == 'V') | |
1528 au32 = vtohl(au32); | |
1529 if (!checksum) | |
1530 mPUSHu(au32); | |
1531 else if (checksum > bits_in_uv) | |
1532 cdouble += (NV)au32; | |
1533 else | |
1534 cuv += au32; | |
1535 } | |
1536 break; | |
1537 case 'V' | TYPE_IS_SHRIEKING: | |
1538 case 'N' | TYPE_IS_SHRIEKING: | |
1539 while (len-- > 0) { | |
1540 I32 ai32; | |
1541 #if U32SIZE > SIZE32 | |
1542 ai32 = 0; | |
1543 #endif | |
1544 SHIFT32(utf8, s, strend, &ai32, datumtype, needs_swap); | |
1545 /* There should never be any byte swapping here. */ | |
1546 assert(!TYPE_ENDIANNESS(datumtype)); | |
1547 if (datumtype == ('N' | TYPE_IS_SHRIEKING)) | |
1548 ai32 = (I32)PerlSock_ntohl((U32)ai32); | |
1549 if (datumtype == ('V' | TYPE_IS_SHRIEKING)) | |
1550 ai32 = (I32)vtohl((U32)ai32); | |
1551 if (!checksum) | |
1552 mPUSHi(ai32); | |
1553 else if (checksum > bits_in_uv) | |
1554 cdouble += (NV)ai32; | |
1555 else | |
1556 cuv += ai32; | |
1557 } | |
1558 break; | |
1559 case 'p': | |
1560 while (len-- > 0) { | |
1561 const char *aptr; | |
1562 SHIFT_VAR(utf8, s, strend, aptr, datumtype, needs_swap); | |
1563 /* newSVpv generates undef if aptr is NULL */ | |
1564 mPUSHs(newSVpv(aptr, 0)); | |
1565 } | |
1566 break; | |
1567 case 'w': | |
1568 { | |
1569 UV auv = 0; | |
1570 U32 bytes = 0; | |
1571 | |
1572 while (len > 0 && s < strend) { | |
1573 U8 ch; | |
1574 ch = SHIFT_BYTE(utf8, s, strend, datumtype); | |
1575 auv = (auv << 7) | (ch & 0x7f); | |
1576 /* UTF8_IS_XXXXX not right here - using constant 0x80 */ | |
1577 if (ch < 0x80) { | |
1578 bytes = 0; | |
1579 mPUSHu(auv); | |
1580 len--; | |
1581 auv = 0; | |
1582 continue; | |
1583 } | |
1584 if (++bytes >= sizeof(UV)) { /* promote to string */ | |
1585 const char *t; | |
1586 | |
1587 sv = Perl_newSVpvf(aTHX_ "%.*"UVuf, (int)TYPE_DIGITS(UV), auv); | |
1588 while (s < strend) { | |
1589 ch = SHIFT_BYTE(utf8, s, strend, datumtype); | |
1590 sv = mul128(sv, (U8)(ch & 0x7f)); | |
1591 if (!(ch & 0x80)) { | |
1592 bytes = 0; | |
1593 break; | |
1594 } | |
1595 } | |
1596 t = SvPV_nolen_const(sv); | |
1597 while (*t == '0') | |
1598 t++; | |
1599 sv_chop(sv, t); | |
1600 mPUSHs(sv); | |
1601 len--; | |
1602 auv = 0; | |
1603 } | |
1604 } | |
1605 if ((s >= strend) && bytes) | |
1606 Perl_croak(aTHX_ "Unterminated compressed integer in unpack"); | |
1607 } | |
1608 break; | |
1609 case 'P': | |
1610 if (symptr->howlen == e_star) | |
1611 Perl_croak(aTHX_ "'P' must have an explicit size in unpack"); | |
1612 EXTEND(SP, 1); | |
1613 if (s + sizeof(char*) <= strend) { | |
1614 char *aptr; | |
1615 SHIFT_VAR(utf8, s, strend, aptr, datumtype, needs_swap); | |
1616 /* newSVpvn generates undef if aptr is NULL */ | |
1617 PUSHs(newSVpvn_flags(aptr, len, SVs_TEMP)); | |
1618 } | |
1619 break; | |
1620 #if defined(HAS_QUAD) && IVSIZE >= 8 | |
1621 case 'q': | |
1622 while (len-- > 0) { | |
1623 Quad_t aquad; | |
1624 SHIFT_VAR(utf8, s, strend, aquad, datumtype, needs_swap); | |
1625 if (!checksum) | |
1626 mPUSHs(newSViv((IV)aquad)); | |
1627 else if (checksum > bits_in_uv) | |
1628 cdouble += (NV)aquad; | |
1629 else | |
1630 cuv += aquad; | |
1631 } | |
1632 break; | |
1633 case 'Q': | |
1634 while (len-- > 0) { | |
1635 Uquad_t auquad; | |
1636 SHIFT_VAR(utf8, s, strend, auquad, datumtype, needs_swap); | |
1637 if (!checksum) | |
1638 mPUSHs(newSVuv((UV)auquad)); | |
1639 else if (checksum > bits_in_uv) | |
1640 cdouble += (NV)auquad; | |
1641 else | |
1642 cuv += auquad; | |
1643 } | |
1644 break; | |
1645 #endif | |
1646 /* float and double added gnb@melba.bby.oz.au 22/11/89 */ | |
1647 case 'f': | |
1648 while (len-- > 0) { | |
1649 float afloat; | |
1650 SHIFT_VAR(utf8, s, strend, afloat, datumtype, needs_swap); | |
1651 if (!checksum) | |
1652 mPUSHn(afloat); | |
1653 else | |
1654 cdouble += afloat; | |
1655 } | |
1656 break; | |
1657 case 'd': | |
1658 while (len-- > 0) { | |
1659 double adouble; | |
1660 SHIFT_VAR(utf8, s, strend, adouble, datumtype, needs_swap); | |
1661 if (!checksum) | |
1662 mPUSHn(adouble); | |
1663 else | |
1664 cdouble += adouble; | |
1665 } | |
1666 break; | |
1667 case 'F': | |
1668 while (len-- > 0) { | |
1669 NV_bytes anv; | |
1670 SHIFT_BYTES(utf8, s, strend, anv.bytes, sizeof(anv.bytes), | |
1671 datumtype, needs_swap); | |
1672 if (!checksum) | |
1673 mPUSHn(anv.nv); | |
1674 else | |
1675 cdouble += anv.nv; | |
1676 } | |
1677 break; | |
1678 #if defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE) | |
1679 case 'D': | |
1680 while (len-- > 0) { | |
1681 ld_bytes aldouble; | |
1682 SHIFT_BYTES(utf8, s, strend, aldouble.bytes, | |
1683 sizeof(aldouble.bytes), datumtype, needs_swap); | |
1684 /* The most common long double format, the x86 80-bit | |
1685 * extended precision, has either 2 or 6 unused bytes, | |
1686 * which may contain garbage, which may contain | |
1687 * unintentional data. While we do zero the bytes of | |
1688 * the long double data in pack(), here in unpack() we | |
1689 * don't, because it's really hard to envision that | |
1690 * reading the long double off aldouble would be | |
1691 * affected by the unused bytes. | |
1692 * | |
1693 * Note that trying to unpack 'long doubles' of 'long | |
1694 * doubles' packed in another system is in the general | |
1695 * case doomed without having more detail. */ | |
1696 if (!checksum) | |
1697 mPUSHn(aldouble.ld); | |
1698 else | |
1699 cdouble += aldouble.ld; | |
1700 } | |
1701 break; | |
1702 #endif | |
1703 case 'u': | |
1704 if (!checksum) { | |
1705 const STRLEN l = (STRLEN) (strend - s) * 3 / 4; | |
1706 sv = sv_2mortal(newSV(l)); | |
1707 if (l) SvPOK_on(sv); | |
1708 } | |
1709 | |
1710 /* Note that all legal uuencoded strings are ASCII printables, so | |
1711 * have the same representation under UTF-8 vs not. This means we | |
1712 * can ignore UTF8ness on legal input. For illegal we stop at the | |
1713 * first failure, and don't report where/what that is, so again we | |
1714 * can ignore UTF8ness */ | |
1715 | |
1716 while (s < strend && *s != ' ' && ISUUCHAR(*s)) { | |
1717 I32 a, b, c, d; | |
1718 char hunk[3]; | |
1719 | |
1720 len = PL_uudmap[*(U8*)s++] & 077; | |
1721 while (len > 0) { | |
1722 if (s < strend && ISUUCHAR(*s)) | |
1723 a = PL_uudmap[*(U8*)s++] & 077; | |
1724 else | |
1725 a = 0; | |
1726 if (s < strend && ISUUCHAR(*s)) | |
1727 b = PL_uudmap[*(U8*)s++] & 077; | |
1728 else | |
1729 b = 0; | |
1730 if (s < strend && ISUUCHAR(*s)) | |
1731 c = PL_uudmap[*(U8*)s++] & 077; | |
1732 else | |
1733 c = 0; | |
1734 if (s < strend && ISUUCHAR(*s)) | |
1735 d = PL_uudmap[*(U8*)s++] & 077; | |
1736 else | |
1737 d = 0; | |
1738 hunk[0] = (char)((a << 2) | (b >> 4)); | |
1739 hunk[1] = (char)((b << 4) | (c >> 2)); | |
1740 hunk[2] = (char)((c << 6) | d); | |
1741 if (!checksum) | |
1742 sv_catpvn(sv, hunk, (len > 3) ? 3 : len); | |
1743 len -= 3; | |
1744 } | |
1745 if (*s == '\n') | |
1746 s++; | |
1747 else /* possible checksum byte */ | |
1748 if (s + 1 < strend && s[1] == '\n') | |
1749 s += 2; | |
1750 } | |
1751 if (!checksum) | |
1752 XPUSHs(sv); | |
1753 break; | |
1754 } /* End of switch */ | |
1755 | |
1756 if (checksum) { | |
1757 if (strchr("fFdD", TYPE_NO_MODIFIERS(datumtype)) || | |
1758 (checksum > bits_in_uv && | |
1759 strchr("cCsSiIlLnNUWvVqQjJ", TYPE_NO_MODIFIERS(datumtype))) ) { | |
1760 NV trouble, anv; | |
1761 | |
1762 anv = (NV) (1 << (checksum & 15)); | |
1763 while (checksum >= 16) { | |
1764 checksum -= 16; | |
1765 anv *= 65536.0; | |
1766 } | |
1767 while (cdouble < 0.0) | |
1768 cdouble += anv; | |
1769 cdouble = Perl_modf(cdouble / anv, &trouble); | |
1770 #ifdef LONGDOUBLE_DOUBLEDOUBLE | |
1771 /* Workaround for powerpc doubledouble modfl bug: | |
1772 * close to 1.0L and -1.0L cdouble is 0, and trouble | |
1773 * is cdouble / anv. */ | |
1774 if (trouble != Perl_ceil(trouble)) { | |
1775 cdouble = trouble; | |
1776 if (cdouble > 1.0L) cdouble -= 1.0L; | |
1777 if (cdouble < -1.0L) cdouble += 1.0L; | |
1778 } | |
1779 #endif | |
1780 cdouble *= anv; | |
1781 sv = newSVnv(cdouble); | |
1782 } | |
1783 else { | |
1784 if (checksum < bits_in_uv) { | |
1785 UV mask = ((UV)1 << checksum) - 1; | |
1786 cuv &= mask; | |
1787 } | |
1788 sv = newSVuv(cuv); | |
1789 } | |
1790 mXPUSHs(sv); | |
1791 checksum = 0; | |
1792 } | |
1793 | |
1794 if (symptr->flags & FLAG_SLASH){ | |
1795 if (SP - PL_stack_base - start_sp_offset <= 0) | |
1796 break; | |
1797 if( next_symbol(symptr) ){ | |
1798 if( symptr->howlen == e_number ) | |
1799 Perl_croak(aTHX_ "Count after length/code in unpack" ); | |
1800 if( beyond ){ | |
1801 /* ...end of char buffer then no decent length available */ | |
1802 Perl_croak(aTHX_ "length/code after end of string in unpack" ); | |
1803 } else { | |
1804 /* take top of stack (hope it's numeric) */ | |
1805 len = POPi; | |
1806 if( len < 0 ) | |
1807 Perl_croak(aTHX_ "Negative '/' count in unpack" ); | |
1808 } | |
1809 } else { | |
1810 Perl_croak(aTHX_ "Code missing after '/' in unpack" ); | |
1811 } | |
1812 datumtype = symptr->code; | |
1813 explicit_length = FALSE; | |
1814 goto redo_switch; | |
1815 } | |
1816 } | |
1817 | |
1818 if (new_s) | |
1819 *new_s = s; | |
1820 PUTBACK; | |
1821 return SP - PL_stack_base - start_sp_offset; | |
1822 } | |
1823 | |
1824 PP(pp_unpack) | |
1825 { | |
1826 dSP; | |
1827 dPOPPOPssrl; | |
1828 I32 gimme = GIMME_V; | |
1829 STRLEN llen; | |
1830 STRLEN rlen; | |
1831 const char *pat = SvPV_const(left, llen); | |
1832 const char *s = SvPV_const(right, rlen); | |
1833 const char *strend = s + rlen; | |
1834 const char *patend = pat + llen; | |
1835 I32 cnt; | |
1836 | |
1837 PUTBACK; | |
1838 cnt = unpackstring(pat, patend, s, strend, | |
1839 ((gimme == G_SCALAR) ? FLAG_UNPACK_ONLY_ONE : 0) | |
1840 | (DO_UTF8(right) ? FLAG_DO_UTF8 : 0)); | |
1841 | |
1842 SPAGAIN; | |
1843 if ( !cnt && gimme == G_SCALAR ) | |
1844 PUSHs(&PL_sv_undef); | |
1845 RETURN; | |
1846 } | |
1847 | |
1848 STATIC U8 * | |
1849 doencodes(U8 *h, const U8 *s, I32 len) | |
1850 { | |
1851 *h++ = PL_uuemap[len]; | |
1852 while (len > 2) { | |
1853 *h++ = PL_uuemap[(077 & (s[0] >> 2))]; | |
1854 *h++ = PL_uuemap[(077 & (((s[0] << 4) & 060) | ((s[1] >> 4) & 017)))]; | |
1855 *h++ = PL_uuemap[(077 & (((s[1] << 2) & 074) | ((s[2] >> 6) & 03)))]; | |
1856 *h++ = PL_uuemap[(077 & (s[2] & 077))]; | |
1857 s += 3; | |
1858 len -= 3; | |
1859 } | |
1860 if (len > 0) { | |
1861 const U8 r = (len > 1 ? s[1] : '\0'); | |
1862 *h++ = PL_uuemap[(077 & (s[0] >> 2))]; | |
1863 *h++ = PL_uuemap[(077 & (((s[0] << 4) & 060) | ((r >> 4) & 017)))]; | |
1864 *h++ = PL_uuemap[(077 & ((r << 2) & 074))]; | |
1865 *h++ = PL_uuemap[0]; | |
1866 } | |
1867 *h++ = '\n'; | |
1868 return h; | |
1869 } | |
1870 | |
1871 STATIC SV * | |
1872 S_is_an_int(pTHX_ const char *s, STRLEN l) | |
1873 { | |
1874 SV *result = newSVpvn(s, l); | |
1875 char *const result_c = SvPV_nolen(result); /* convenience */ | |
1876 char *out = result_c; | |
1877 bool skip = 1; | |
1878 bool ignore = 0; | |
1879 | |
1880 PERL_ARGS_ASSERT_IS_AN_INT; | |
1881 | |
1882 while (*s) { | |
1883 switch (*s) { | |
1884 case ' ': | |
1885 break; | |
1886 case '+': | |
1887 if (!skip) { | |
1888 SvREFCNT_dec(result); | |
1889 return (NULL); | |
1890 } | |
1891 break; | |
1892 case '0': | |
1893 case '1': | |
1894 case '2': | |
1895 case '3': | |
1896 case '4': | |
1897 case '5': | |
1898 case '6': | |
1899 case '7': | |
1900 case '8': | |
1901 case '9': | |
1902 skip = 0; | |
1903 if (!ignore) { | |
1904 *(out++) = *s; | |
1905 } | |
1906 break; | |
1907 case '.': | |
1908 ignore = 1; | |
1909 break; | |
1910 default: | |
1911 SvREFCNT_dec(result); | |
1912 return (NULL); | |
1913 } | |
1914 s++; | |
1915 } | |
1916 *(out++) = '\0'; | |
1917 SvCUR_set(result, out - result_c); | |
1918 return (result); | |
1919 } | |
1920 | |
1921 /* pnum must be '\0' terminated */ | |
1922 STATIC int | |
1923 S_div128(pTHX_ SV *pnum, bool *done) | |
1924 { | |
1925 STRLEN len; | |
1926 char * const s = SvPV(pnum, len); | |
1927 char *t = s; | |
1928 int m = 0; | |
1929 | |
1930 PERL_ARGS_ASSERT_DIV128; | |
1931 | |
1932 *done = 1; | |
1933 while (*t) { | |
1934 const int i = m * 10 + (*t - '0'); | |
1935 const int r = (i >> 7); /* r < 10 */ | |
1936 m = i & 0x7F; | |
1937 if (r) { | |
1938 *done = 0; | |
1939 } | |
1940 *(t++) = '0' + r; | |
1941 } | |
1942 *(t++) = '\0'; | |
1943 SvCUR_set(pnum, (STRLEN) (t - s)); | |
1944 return (m); | |
1945 } | |
1946 | |
1947 /* | |
1948 =for apidoc packlist | |
1949 | |
1950 The engine implementing pack() Perl function. | |
1951 | |
1952 =cut | |
1953 */ | |
1954 | |
1955 void | |
1956 Perl_packlist(pTHX_ SV *cat, const char *pat, const char *patend, SV **beglist, SV **endlist ) | |
1957 { | |
1958 tempsym_t sym; | |
1959 | |
1960 PERL_ARGS_ASSERT_PACKLIST; | |
1961 | |
1962 TEMPSYM_INIT(&sym, pat, patend, FLAG_PACK); | |
1963 | |
1964 /* We're going to do changes through SvPVX(cat). Make sure it's valid. | |
1965 Also make sure any UTF8 flag is loaded */ | |
1966 SvPV_force_nolen(cat); | |
1967 if (DO_UTF8(cat)) | |
1968 sym.flags |= FLAG_PARSE_UTF8 | FLAG_DO_UTF8; | |
1969 | |
1970 (void)pack_rec( cat, &sym, beglist, endlist ); | |
1971 } | |
1972 | |
1973 /* like sv_utf8_upgrade, but also repoint the group start markers */ | |
1974 STATIC void | |
1975 marked_upgrade(pTHX_ SV *sv, tempsym_t *sym_ptr) { | |
1976 STRLEN len; | |
1977 tempsym_t *group; | |
1978 const char *from_ptr, *from_start, *from_end, **marks, **m; | |
1979 char *to_start, *to_ptr; | |
1980 | |
1981 if (SvUTF8(sv)) return; | |
1982 | |
1983 from_start = SvPVX_const(sv); | |
1984 from_end = from_start + SvCUR(sv); | |
1985 for (from_ptr = from_start; from_ptr < from_end; from_ptr++) | |
1986 if (!NATIVE_BYTE_IS_INVARIANT(*from_ptr)) break; | |
1987 if (from_ptr == from_end) { | |
1988 /* Simple case: no character needs to be changed */ | |
1989 SvUTF8_on(sv); | |
1990 return; | |
1991 } | |
1992 | |
1993 len = (from_end-from_ptr)*UTF8_EXPAND+(from_ptr-from_start)+1; | |
1994 Newx(to_start, len, char); | |
1995 Copy(from_start, to_start, from_ptr-from_start, char); | |
1996 to_ptr = to_start + (from_ptr-from_start); | |
1997 | |
1998 Newx(marks, sym_ptr->level+2, const char *); | |
1999 for (group=sym_ptr; group; group = group->previous) | |
2000 marks[group->level] = from_start + group->strbeg; | |
2001 marks[sym_ptr->level+1] = from_end+1; | |
2002 for (m = marks; *m < from_ptr; m++) | |
2003 *m = to_start + (*m-from_start); | |
2004 | |
2005 for (;from_ptr < from_end; from_ptr++) { | |
2006 while (*m == from_ptr) *m++ = to_ptr; | |
2007 to_ptr = (char *) uvchr_to_utf8((U8 *) to_ptr, *(U8 *) from_ptr); | |
2008 } | |
2009 *to_ptr = 0; | |
2010 | |
2011 while (*m == from_ptr) *m++ = to_ptr; | |
2012 if (m != marks + sym_ptr->level+1) { | |
2013 Safefree(marks); | |
2014 Safefree(to_start); | |
2015 Perl_croak(aTHX_ "panic: marks beyond string end, m=%p, marks=%p, " | |
2016 "level=%d", m, marks, sym_ptr->level); | |
2017 } | |
2018 for (group=sym_ptr; group; group = group->previous) | |
2019 group->strbeg = marks[group->level] - to_start; | |
2020 Safefree(marks); | |
2021 | |
2022 if (SvOOK(sv)) { | |
2023 if (SvIVX(sv)) { | |
2024 SvLEN_set(sv, SvLEN(sv) + SvIVX(sv)); | |
2025 from_start -= SvIVX(sv); | |
2026 SvIV_set(sv, 0); | |
2027 } | |
2028 SvFLAGS(sv) &= ~SVf_OOK; | |
2029 } | |
2030 if (SvLEN(sv) != 0) | |
2031 Safefree(from_start); | |
2032 SvPV_set(sv, to_start); | |
2033 SvCUR_set(sv, to_ptr - to_start); | |
2034 SvLEN_set(sv, len); | |
2035 SvUTF8_on(sv); | |
2036 } | |
2037 | |
2038 /* Exponential string grower. Makes string extension effectively O(n) | |
2039 needed says how many extra bytes we need (not counting the final '\0') | |
2040 Only grows the string if there is an actual lack of space | |
2041 */ | |
2042 STATIC char * | |
2043 S_sv_exp_grow(pTHX_ SV *sv, STRLEN needed) { | |
2044 const STRLEN cur = SvCUR(sv); | |
2045 const STRLEN len = SvLEN(sv); | |
2046 STRLEN extend; | |
2047 | |
2048 PERL_ARGS_ASSERT_SV_EXP_GROW; | |
2049 | |
2050 if (len - cur > needed) return SvPVX(sv); | |
2051 extend = needed > len ? needed : len; | |
2052 return SvGROW(sv, len+extend+1); | |
2053 } | |
2054 | |
2055 static SV * | |
2056 S_sv_check_infnan(pTHX_ SV *sv, I32 datumtype) | |
2057 { | |
2058 SvGETMAGIC(sv); | |
2059 if (UNLIKELY(SvAMAGIC(sv))) | |
2060 sv = sv_2num(sv); | |
2061 if (UNLIKELY(isinfnansv(sv))) { | |
2062 const I32 c = TYPE_NO_MODIFIERS(datumtype); | |
2063 const NV nv = SvNV_nomg(sv); | |
2064 if (c == 'w') | |
2065 Perl_croak(aTHX_ "Cannot compress %"NVgf" in pack", nv); | |
2066 else | |
2067 Perl_croak(aTHX_ "Cannot pack %"NVgf" with '%c'", nv, (int) c); | |
2068 } | |
2069 return sv; | |
2070 } | |
2071 | |
2072 #define SvIV_no_inf(sv,d) \ | |
2073 ((sv) = S_sv_check_infnan(aTHX_ sv,d), SvIV_nomg(sv)) | |
2074 #define SvUV_no_inf(sv,d) \ | |
2075 ((sv) = S_sv_check_infnan(aTHX_ sv,d), SvUV_nomg(sv)) | |
2076 | |
2077 STATIC | |
2078 SV ** | |
2079 S_pack_rec(pTHX_ SV *cat, tempsym_t* symptr, SV **beglist, SV **endlist ) | |
2080 { | |
2081 tempsym_t lookahead; | |
2082 I32 items = endlist - beglist; | |
2083 bool found = next_symbol(symptr); | |
2084 bool utf8 = (symptr->flags & FLAG_PARSE_UTF8) ? 1 : 0; | |
2085 bool warn_utf8 = ckWARN(WARN_UTF8); | |
2086 char* from; | |
2087 | |
2088 PERL_ARGS_ASSERT_PACK_REC; | |
2089 | |
2090 if (symptr->level == 0 && found && symptr->code == 'U') { | |
2091 marked_upgrade(aTHX_ cat, symptr); | |
2092 symptr->flags |= FLAG_DO_UTF8; | |
2093 utf8 = 0; | |
2094 } | |
2095 symptr->strbeg = SvCUR(cat); | |
2096 | |
2097 while (found) { | |
2098 SV *fromstr; | |
2099 STRLEN fromlen; | |
2100 I32 len; | |
2101 SV *lengthcode = NULL; | |
2102 I32 datumtype = symptr->code; | |
2103 howlen_t howlen = symptr->howlen; | |
2104 char *start = SvPVX(cat); | |
2105 char *cur = start + SvCUR(cat); | |
2106 bool needs_swap; | |
2107 | |
2108 #define NEXTFROM (lengthcode ? lengthcode : items > 0 ? (--items, *beglist++) : &PL_sv_no) | |
2109 #define PEEKFROM (lengthcode ? lengthcode : items > 0 ? *beglist : &PL_sv_no) | |
2110 | |
2111 switch (howlen) { | |
2112 case e_star: | |
2113 len = strchr("@Xxu", TYPE_NO_MODIFIERS(datumtype)) ? | |
2114 0 : items; | |
2115 break; | |
2116 default: | |
2117 /* e_no_len and e_number */ | |
2118 len = symptr->length; | |
2119 break; | |
2120 } | |
2121 | |
2122 if (len) { | |
2123 packprops_t props = packprops[TYPE_NO_ENDIANNESS(datumtype)]; | |
2124 | |
2125 if (props && !(props & PACK_SIZE_UNPREDICTABLE)) { | |
2126 /* We can process this letter. */ | |
2127 STRLEN size = props & PACK_SIZE_MASK; | |
2128 GROWING(utf8, cat, start, cur, (STRLEN) len * size); | |
2129 } | |
2130 } | |
2131 | |
2132 /* Look ahead for next symbol. Do we have code/code? */ | |
2133 lookahead = *symptr; | |
2134 found = next_symbol(&lookahead); | |
2135 if (symptr->flags & FLAG_SLASH) { | |
2136 IV count; | |
2137 if (!found) Perl_croak(aTHX_ "Code missing after '/' in pack"); | |
2138 if (strchr("aAZ", lookahead.code)) { | |
2139 if (lookahead.howlen == e_number) count = lookahead.length; | |
2140 else { | |
2141 if (items > 0) { | |
2142 count = sv_len_utf8(*beglist); | |
2143 } | |
2144 else count = 0; | |
2145 if (lookahead.code == 'Z') count++; | |
2146 } | |
2147 } else { | |
2148 if (lookahead.howlen == e_number && lookahead.length < items) | |
2149 count = lookahead.length; | |
2150 else count = items; | |
2151 } | |
2152 lookahead.howlen = e_number; | |
2153 lookahead.length = count; | |
2154 lengthcode = sv_2mortal(newSViv(count)); | |
2155 } | |
2156 | |
2157 needs_swap = NEEDS_SWAP(datumtype); | |
2158 | |
2159 /* Code inside the switch must take care to properly update | |
2160 cat (CUR length and '\0' termination) if it updated *cur and | |
2161 doesn't simply leave using break */ | |
2162 switch (TYPE_NO_ENDIANNESS(datumtype)) { | |
2163 default: | |
2164 Perl_croak(aTHX_ "Invalid type '%c' in pack", | |
2165 (int) TYPE_NO_MODIFIERS(datumtype)); | |
2166 case '%': | |
2167 Perl_croak(aTHX_ "'%%' may not be used in pack"); | |
2168 | |
2169 case '.' | TYPE_IS_SHRIEKING: | |
2170 case '.': | |
2171 if (howlen == e_star) from = start; | |
2172 else if (len == 0) from = cur; | |
2173 else { | |
2174 tempsym_t *group = symptr; | |
2175 | |
2176 while (--len && group) group = group->previous; | |
2177 from = group ? start + group->strbeg : start; | |
2178 } | |
2179 fromstr = NEXTFROM; | |
2180 len = SvIV_no_inf(fromstr, datumtype); | |
2181 goto resize; | |
2182 case '@' | TYPE_IS_SHRIEKING: | |
2183 case '@': | |
2184 from = start + symptr->strbeg; | |
2185 resize: | |
2186 if (utf8 && !(datumtype & TYPE_IS_SHRIEKING)) | |
2187 if (len >= 0) { | |
2188 while (len && from < cur) { | |
2189 from += UTF8SKIP(from); | |
2190 len--; | |
2191 } | |
2192 if (from > cur) | |
2193 Perl_croak(aTHX_ "Malformed UTF-8 string in pack"); | |
2194 if (len) { | |
2195 /* Here we know from == cur */ | |
2196 grow: | |
2197 GROWING(0, cat, start, cur, len); | |
2198 Zero(cur, len, char); | |
2199 cur += len; | |
2200 } else if (from < cur) { | |
2201 len = cur - from; | |
2202 goto shrink; | |
2203 } else goto no_change; | |
2204 } else { | |
2205 cur = from; | |
2206 len = -len; | |
2207 goto utf8_shrink; | |
2208 } | |
2209 else { | |
2210 len -= cur - from; | |
2211 if (len > 0) goto grow; | |
2212 if (len == 0) goto no_change; | |
2213 len = -len; | |
2214 goto shrink; | |
2215 } | |
2216 break; | |
2217 | |
2218 case '(': { | |
2219 tempsym_t savsym = *symptr; | |
2220 U32 group_modifiers = TYPE_MODIFIERS(datumtype & ~symptr->flags); | |
2221 symptr->flags |= group_modifiers; | |
2222 symptr->patend = savsym.grpend; | |
2223 symptr->level++; | |
2224 symptr->previous = &lookahead; | |
2225 while (len--) { | |
2226 U32 was_utf8; | |
2227 if (utf8) symptr->flags |= FLAG_PARSE_UTF8; | |
2228 else symptr->flags &= ~FLAG_PARSE_UTF8; | |
2229 was_utf8 = SvUTF8(cat); | |
2230 symptr->patptr = savsym.grpbeg; | |
2231 beglist = pack_rec(cat, symptr, beglist, endlist); | |
2232 if (SvUTF8(cat) != was_utf8) | |
2233 /* This had better be an upgrade while in utf8==0 mode */ | |
2234 utf8 = 1; | |
2235 | |
2236 if (savsym.howlen == e_star && beglist == endlist) | |
2237 break; /* No way to continue */ | |
2238 } | |
2239 items = endlist - beglist; | |
2240 lookahead.flags = symptr->flags & ~group_modifiers; | |
2241 goto no_change; | |
2242 } | |
2243 case 'X' | TYPE_IS_SHRIEKING: | |
2244 if (!len) /* Avoid division by 0 */ | |
2245 len = 1; | |
2246 if (utf8) { | |
2247 char *hop, *last; | |
2248 I32 l = len; | |
2249 hop = last = start; | |
2250 while (hop < cur) { | |
2251 hop += UTF8SKIP(hop); | |
2252 if (--l == 0) { | |
2253 last = hop; | |
2254 l = len; | |
2255 } | |
2256 } | |
2257 if (last > cur) | |
2258 Perl_croak(aTHX_ "Malformed UTF-8 string in pack"); | |
2259 cur = last; | |
2260 break; | |
2261 } | |
2262 len = (cur-start) % len; | |
2263 /* FALLTHROUGH */ | |
2264 case 'X': | |
2265 if (utf8) { | |
2266 if (len < 1) goto no_change; | |
2267 utf8_shrink: | |
2268 while (len > 0) { | |
2269 if (cur <= start) | |
2270 Perl_croak(aTHX_ "'%c' outside of string in pack", | |
2271 (int) TYPE_NO_MODIFIERS(datumtype)); | |
2272 while (--cur, UTF8_IS_CONTINUATION(*cur)) { | |
2273 if (cur <= start) | |
2274 Perl_croak(aTHX_ "'%c' outside of string in pack", | |
2275 (int) TYPE_NO_MODIFIERS(datumtype)); | |
2276 } | |
2277 len--; | |
2278 } | |
2279 } else { | |
2280 shrink: | |
2281 if (cur - start < len) | |
2282 Perl_croak(aTHX_ "'%c' outside of string in pack", | |
2283 (int) TYPE_NO_MODIFIERS(datumtype)); | |
2284 cur -= len; | |
2285 } | |
2286 if (cur < start+symptr->strbeg) { | |
2287 /* Make sure group starts don't point into the void */ | |
2288 tempsym_t *group; | |
2289 const STRLEN length = cur-start; | |
2290 for (group = symptr; | |
2291 group && length < group->strbeg; | |
2292 group = group->previous) group->strbeg = length; | |
2293 lookahead.strbeg = length; | |
2294 } | |
2295 break; | |
2296 case 'x' | TYPE_IS_SHRIEKING: { | |
2297 I32 ai32; | |
2298 if (!len) /* Avoid division by 0 */ | |
2299 len = 1; | |
2300 if (utf8) ai32 = utf8_length((U8 *) start, (U8 *) cur) % len; | |
2301 else ai32 = (cur - start) % len; | |
2302 if (ai32 == 0) goto no_change; | |
2303 len -= ai32; | |
2304 } | |
2305 /* FALLTHROUGH */ | |
2306 case 'x': | |
2307 goto grow; | |
2308 case 'A': | |
2309 case 'Z': | |
2310 case 'a': { | |
2311 const char *aptr; | |
2312 | |
2313 fromstr = NEXTFROM; | |
2314 aptr = SvPV_const(fromstr, fromlen); | |
2315 if (DO_UTF8(fromstr)) { | |
2316 const char *end, *s; | |
2317 | |
2318 if (!utf8 && !SvUTF8(cat)) { | |
2319 marked_upgrade(aTHX_ cat, symptr); | |
2320 lookahead.flags |= FLAG_DO_UTF8; | |
2321 lookahead.strbeg = symptr->strbeg; | |
2322 utf8 = 1; | |
2323 start = SvPVX(cat); | |
2324 cur = start + SvCUR(cat); | |
2325 } | |
2326 if (howlen == e_star) { | |
2327 if (utf8) goto string_copy; | |
2328 len = fromlen+1; | |
2329 } | |
2330 s = aptr; | |
2331 end = aptr + fromlen; | |
2332 fromlen = datumtype == 'Z' ? len-1 : len; | |
2333 while ((I32) fromlen > 0 && s < end) { | |
2334 s += UTF8SKIP(s); | |
2335 fromlen--; | |
2336 } | |
2337 if (s > end) | |
2338 Perl_croak(aTHX_ "Malformed UTF-8 string in pack"); | |
2339 if (utf8) { | |
2340 len = fromlen; | |
2341 if (datumtype == 'Z') len++; | |
2342 fromlen = s-aptr; | |
2343 len += fromlen; | |
2344 | |
2345 goto string_copy; | |
2346 } | |
2347 fromlen = len - fromlen; | |
2348 if (datumtype == 'Z') fromlen--; | |
2349 if (howlen == e_star) { | |
2350 len = fromlen; | |
2351 if (datumtype == 'Z') len++; | |
2352 } | |
2353 GROWING(0, cat, start, cur, len); | |
2354 if (!S_utf8_to_bytes(aTHX_ &aptr, end, cur, fromlen, | |
2355 datumtype | TYPE_IS_PACK)) | |
2356 Perl_croak(aTHX_ "panic: predicted utf8 length not available, " | |
2357 "for '%c', aptr=%p end=%p cur=%p, fromlen=%"UVuf, | |
2358 (int)datumtype, aptr, end, cur, (UV)fromlen); | |
2359 cur += fromlen; | |
2360 len -= fromlen; | |
2361 } else if (utf8) { | |
2362 if (howlen == e_star) { | |
2363 len = fromlen; | |
2364 if (datumtype == 'Z') len++; | |
2365 } | |
2366 if (len <= (I32) fromlen) { | |
2367 fromlen = len; | |
2368 if (datumtype == 'Z' && fromlen > 0) fromlen--; | |
2369 } | |
2370 /* assumes a byte expands to at most UTF8_EXPAND bytes on | |
2371 upgrade, so: | |
2372 expected_length <= from_len*UTF8_EXPAND + (len-from_len) */ | |
2373 GROWING(0, cat, start, cur, fromlen*(UTF8_EXPAND-1)+len); | |
2374 len -= fromlen; | |
2375 while (fromlen > 0) { | |
2376 cur = (char *) uvchr_to_utf8((U8 *) cur, * (U8 *) aptr); | |
2377 aptr++; | |
2378 fromlen--; | |
2379 } | |
2380 } else { | |
2381 string_copy: | |
2382 if (howlen == e_star) { | |
2383 len = fromlen; | |
2384 if (datumtype == 'Z') len++; | |
2385 } | |
2386 if (len <= (I32) fromlen) { | |
2387 fromlen = len; | |
2388 if (datumtype == 'Z' && fromlen > 0) fromlen--; | |
2389 } | |
2390 GROWING(0, cat, start, cur, len); | |
2391 Copy(aptr, cur, fromlen, char); | |
2392 cur += fromlen; | |
2393 len -= fromlen; | |
2394 } | |
2395 memset(cur, datumtype == 'A' ? ' ' : '\0', len); | |
2396 cur += len; | |
2397 SvTAINT(cat); | |
2398 break; | |
2399 } | |
2400 case 'B': | |
2401 case 'b': { | |
2402 const char *str, *end; | |
2403 I32 l, field_len; | |
2404 U8 bits; | |
2405 bool utf8_source; | |
2406 U32 utf8_flags; | |
2407 | |
2408 fromstr = NEXTFROM; | |
2409 str = SvPV_const(fromstr, fromlen); | |
2410 end = str + fromlen; | |
2411 if (DO_UTF8(fromstr)) { | |
2412 utf8_source = TRUE; | |
2413 utf8_flags = warn_utf8 ? 0 : UTF8_ALLOW_ANY; | |
2414 } else { | |
2415 utf8_source = FALSE; | |
2416 utf8_flags = 0; /* Unused, but keep compilers happy */ | |
2417 } | |
2418 if (howlen == e_star) len = fromlen; | |
2419 field_len = (len+7)/8; | |
2420 GROWING(utf8, cat, start, cur, field_len); | |
2421 if (len > (I32)fromlen) len = fromlen; | |
2422 bits = 0; | |
2423 l = 0; | |
2424 if (datumtype == 'B') | |
2425 while (l++ < len) { | |
2426 if (utf8_source) { | |
2427 UV val = 0; | |
2428 NEXT_UNI_VAL(val, cur, str, end, utf8_flags); | |
2429 bits |= val & 1; | |
2430 } else bits |= *str++ & 1; | |
2431 if (l & 7) bits <<= 1; | |
2432 else { | |
2433 PUSH_BYTE(utf8, cur, bits); | |
2434 bits = 0; | |
2435 } | |
2436 } | |
2437 else | |
2438 /* datumtype == 'b' */ | |
2439 while (l++ < len) { | |
2440 if (utf8_source) { | |
2441 UV val = 0; | |
2442 NEXT_UNI_VAL(val, cur, str, end, utf8_flags); | |
2443 if (val & 1) bits |= 0x80; | |
2444 } else if (*str++ & 1) | |
2445 bits |= 0x80; | |
2446 if (l & 7) bits >>= 1; | |
2447 else { | |
2448 PUSH_BYTE(utf8, cur, bits); | |
2449 bits = 0; | |
2450 } | |
2451 } | |
2452 l--; | |
2453 if (l & 7) { | |
2454 if (datumtype == 'B') | |
2455 bits <<= 7 - (l & 7); | |
2456 else | |
2457 bits >>= 7 - (l & 7); | |
2458 PUSH_BYTE(utf8, cur, bits); | |
2459 l += 7; | |
2460 } | |
2461 /* Determine how many chars are left in the requested field */ | |
2462 l /= 8; | |
2463 if (howlen == e_star) field_len = 0; | |
2464 else field_len -= l; | |
2465 Zero(cur, field_len, char); | |
2466 cur += field_len; | |
2467 break; | |
2468 } | |
2469 case 'H': | |
2470 case 'h': { | |
2471 const char *str, *end; | |
2472 I32 l, field_len; | |
2473 U8 bits; | |
2474 bool utf8_source; | |
2475 U32 utf8_flags; | |
2476 | |
2477 fromstr = NEXTFROM; | |
2478 str = SvPV_const(fromstr, fromlen); | |
2479 end = str + fromlen; | |
2480 if (DO_UTF8(fromstr)) { | |
2481 utf8_source = TRUE; | |
2482 utf8_flags = warn_utf8 ? 0 : UTF8_ALLOW_ANY; | |
2483 } else { | |
2484 utf8_source = FALSE; | |
2485 utf8_flags = 0; /* Unused, but keep compilers happy */ | |
2486 } | |
2487 if (howlen == e_star) len = fromlen; | |
2488 field_len = (len+1)/2; | |
2489 GROWING(utf8, cat, start, cur, field_len); | |
2490 if (!utf8_source && len > (I32)fromlen) len = fromlen; | |
2491 bits = 0; | |
2492 l = 0; | |
2493 if (datumtype == 'H') | |
2494 while (l++ < len) { | |
2495 if (utf8_source) { | |
2496 UV val = 0; | |
2497 NEXT_UNI_VAL(val, cur, str, end, utf8_flags); | |
2498 if (val < 256 && isALPHA(val)) | |
2499 bits |= (val + 9) & 0xf; | |
2500 else | |
2501 bits |= val & 0xf; | |
2502 } else if (isALPHA(*str)) | |
2503 bits |= (*str++ + 9) & 0xf; | |
2504 else | |
2505 bits |= *str++ & 0xf; | |
2506 if (l & 1) bits <<= 4; | |
2507 else { | |
2508 PUSH_BYTE(utf8, cur, bits); | |
2509 bits = 0; | |
2510 } | |
2511 } | |
2512 else | |
2513 while (l++ < len) { | |
2514 if (utf8_source) { | |
2515 UV val = 0; | |
2516 NEXT_UNI_VAL(val, cur, str, end, utf8_flags); | |
2517 if (val < 256 && isALPHA(val)) | |
2518 bits |= ((val + 9) & 0xf) << 4; | |
2519 else | |
2520 bits |= (val & 0xf) << 4; | |
2521 } else if (isALPHA(*str)) | |
2522 bits |= ((*str++ + 9) & 0xf) << 4; | |
2523 else | |
2524 bits |= (*str++ & 0xf) << 4; | |
2525 if (l & 1) bits >>= 4; | |
2526 else { | |
2527 PUSH_BYTE(utf8, cur, bits); | |
2528 bits = 0; | |
2529 } | |
2530 } | |
2531 l--; | |
2532 if (l & 1) { | |
2533 PUSH_BYTE(utf8, cur, bits); | |
2534 l++; | |
2535 } | |
2536 /* Determine how many chars are left in the requested field */ | |
2537 l /= 2; | |
2538 if (howlen == e_star) field_len = 0; | |
2539 else field_len -= l; | |
2540 Zero(cur, field_len, char); | |
2541 cur += field_len; | |
2542 break; | |
2543 } | |
2544 case 'c': | |
2545 while (len-- > 0) { | |
2546 IV aiv; | |
2547 fromstr = NEXTFROM; | |
2548 aiv = SvIV_no_inf(fromstr, datumtype); | |
2549 if ((-128 > aiv || aiv > 127)) | |
2550 Perl_ck_warner(aTHX_ packWARN(WARN_PACK), | |
2551 "Character in 'c' format wrapped in pack"); | |
2552 PUSH_BYTE(utf8, cur, (U8)(aiv & 0xff)); | |
2553 } | |
2554 break; | |
2555 case 'C': | |
2556 if (len == 0) { | |
2557 utf8 = (symptr->flags & FLAG_DO_UTF8) ? 1 : 0; | |
2558 break; | |
2559 } | |
2560 while (len-- > 0) { | |
2561 IV aiv; | |
2562 fromstr = NEXTFROM; | |
2563 aiv = SvIV_no_inf(fromstr, datumtype); | |
2564 if ((0 > aiv || aiv > 0xff)) | |
2565 Perl_ck_warner(aTHX_ packWARN(WARN_PACK), | |
2566 "Character in 'C' format wrapped in pack"); | |
2567 PUSH_BYTE(utf8, cur, (U8)(aiv & 0xff)); | |
2568 } | |
2569 break; | |
2570 case 'W': { | |
2571 char *end; | |
2572 U8 in_bytes = (U8)IN_BYTES; | |
2573 | |
2574 end = start+SvLEN(cat)-1; | |
2575 if (utf8) end -= UTF8_MAXLEN-1; | |
2576 while (len-- > 0) { | |
2577 UV auv; | |
2578 fromstr = NEXTFROM; | |
2579 auv = SvUV_no_inf(fromstr, datumtype); | |
2580 if (in_bytes) auv = auv % 0x100; | |
2581 if (utf8) { | |
2582 W_utf8: | |
2583 if (cur > end) { | |
2584 *cur = '\0'; | |
2585 SvCUR_set(cat, cur - start); | |
2586 | |
2587 GROWING(0, cat, start, cur, len+UTF8_MAXLEN); | |
2588 end = start+SvLEN(cat)-UTF8_MAXLEN; | |
2589 } | |
2590 cur = (char *) uvchr_to_utf8_flags((U8 *) cur, | |
2591 auv, | |
2592 warn_utf8 ? | |
2593 0 : UNICODE_ALLOW_ANY); | |
2594 } else { | |
2595 if (auv >= 0x100) { | |
2596 if (!SvUTF8(cat)) { | |
2597 *cur = '\0'; | |
2598 SvCUR_set(cat, cur - start); | |
2599 marked_upgrade(aTHX_ cat, symptr); | |
2600 lookahead.flags |= FLAG_DO_UTF8; | |
2601 lookahead.strbeg = symptr->strbeg; | |
2602 utf8 = 1; | |
2603 start = SvPVX(cat); | |
2604 cur = start + SvCUR(cat); | |
2605 end = start+SvLEN(cat)-UTF8_MAXLEN; | |
2606 goto W_utf8; | |
2607 } | |
2608 Perl_ck_warner(aTHX_ packWARN(WARN_PACK), | |
2609 "Character in 'W' format wrapped in pack"); | |
2610 auv &= 0xff; | |
2611 } | |
2612 if (cur >= end) { | |
2613 *cur = '\0'; | |
2614 SvCUR_set(cat, cur - start); | |
2615 GROWING(0, cat, start, cur, len+1); | |
2616 end = start+SvLEN(cat)-1; | |
2617 } | |
2618 *(U8 *) cur++ = (U8)auv; | |
2619 } | |
2620 } | |
2621 break; | |
2622 } | |
2623 case 'U': { | |
2624 char *end; | |
2625 | |
2626 if (len == 0) { | |
2627 if (!(symptr->flags & FLAG_DO_UTF8)) { | |
2628 marked_upgrade(aTHX_ cat, symptr); | |
2629 lookahead.flags |= FLAG_DO_UTF8; | |
2630 lookahead.strbeg = symptr->strbeg; | |
2631 } | |
2632 utf8 = 0; | |
2633 goto no_change; | |
2634 } | |
2635 | |
2636 end = start+SvLEN(cat); | |
2637 if (!utf8) end -= UTF8_MAXLEN; | |
2638 while (len-- > 0) { | |
2639 UV auv; | |
2640 fromstr = NEXTFROM; | |
2641 auv = SvUV_no_inf(fromstr, datumtype); | |
2642 if (utf8) { | |
2643 U8 buffer[UTF8_MAXLEN], *endb; | |
2644 endb = uvchr_to_utf8_flags(buffer, UNI_TO_NATIVE(auv), | |
2645 warn_utf8 ? | |
2646 0 : UNICODE_ALLOW_ANY); | |
2647 if (cur+(endb-buffer)*UTF8_EXPAND >= end) { | |
2648 *cur = '\0'; | |
2649 SvCUR_set(cat, cur - start); | |
2650 GROWING(0, cat, start, cur, | |
2651 len+(endb-buffer)*UTF8_EXPAND); | |
2652 end = start+SvLEN(cat); | |
2653 } | |
2654 cur = my_bytes_to_utf8(buffer, endb-buffer, cur, 0); | |
2655 } else { | |
2656 if (cur >= end) { | |
2657 *cur = '\0'; | |
2658 SvCUR_set(cat, cur - start); | |
2659 GROWING(0, cat, start, cur, len+UTF8_MAXLEN); | |
2660 end = start+SvLEN(cat)-UTF8_MAXLEN; | |
2661 } | |
2662 cur = (char *) uvchr_to_utf8_flags((U8 *) cur, UNI_TO_NATIVE(auv), | |
2663 warn_utf8 ? | |
2664 0 : UNICODE_ALLOW_ANY); | |
2665 } | |
2666 } | |
2667 break; | |
2668 } | |
2669 /* Float and double added by gnb@melba.bby.oz.au 22/11/89 */ | |
2670 case 'f': | |
2671 while (len-- > 0) { | |
2672 float afloat; | |
2673 NV anv; | |
2674 fromstr = NEXTFROM; | |
2675 anv = SvNV(fromstr); | |
2676 # if defined(VMS) && !defined(_IEEE_FP) | |
2677 /* IEEE fp overflow shenanigans are unavailable on VAX and optional | |
2678 * on Alpha; fake it if we don't have them. | |
2679 */ | |
2680 if (anv > FLT_MAX) | |
2681 afloat = FLT_MAX; | |
2682 else if (anv < -FLT_MAX) | |
2683 afloat = -FLT_MAX; | |
2684 else afloat = (float)anv; | |
2685 # else | |
2686 #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) | |
2687 if(Perl_isnan(anv)) | |
2688 afloat = (float)NV_NAN; | |
2689 else | |
2690 #endif | |
2691 /* a simple cast to float is undefined if outside | |
2692 * the range of values that can be represented */ | |
2693 afloat = (float)(anv > FLT_MAX ? NV_INF : | |
2694 anv < -FLT_MAX ? -NV_INF : anv); | |
2695 # endif | |
2696 PUSH_VAR(utf8, cur, afloat, needs_swap); | |
2697 } | |
2698 break; | |
2699 case 'd': | |
2700 while (len-- > 0) { | |
2701 double adouble; | |
2702 NV anv; | |
2703 fromstr = NEXTFROM; | |
2704 anv = SvNV(fromstr); | |
2705 # if defined(VMS) && !defined(_IEEE_FP) | |
2706 /* IEEE fp overflow shenanigans are unavailable on VAX and optional | |
2707 * on Alpha; fake it if we don't have them. | |
2708 */ | |
2709 if (anv > DBL_MAX) | |
2710 adouble = DBL_MAX; | |
2711 else if (anv < -DBL_MAX) | |
2712 adouble = -DBL_MAX; | |
2713 else adouble = (double)anv; | |
2714 # else | |
2715 adouble = (double)anv; | |
2716 # endif | |
2717 PUSH_VAR(utf8, cur, adouble, needs_swap); | |
2718 } | |
2719 break; | |
2720 case 'F': { | |
2721 NV_bytes anv; | |
2722 Zero(&anv, 1, NV); /* can be long double with unused bits */ | |
2723 while (len-- > 0) { | |
2724 fromstr = NEXTFROM; | |
2725 #ifdef __GNUC__ | |
2726 /* to work round a gcc/x86 bug; don't use SvNV */ | |
2727 anv.nv = sv_2nv(fromstr); | |
2728 # if defined(LONGDOUBLE_X86_80_BIT) && defined(USE_LONG_DOUBLE) \ | |
2729 && LONG_DOUBLESIZE > 10 | |
2730 /* GCC sometimes overwrites the padding in the | |
2731 assignment above */ | |
2732 Zero(anv.bytes+10, sizeof(anv.bytes) - 10, U8); | |
2733 # endif | |
2734 #else | |
2735 anv.nv = SvNV(fromstr); | |
2736 #endif | |
2737 PUSH_BYTES(utf8, cur, anv.bytes, sizeof(anv.bytes), needs_swap); | |
2738 } | |
2739 break; | |
2740 } | |
2741 #if defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE) | |
2742 case 'D': { | |
2743 ld_bytes aldouble; | |
2744 /* long doubles can have unused bits, which may be nonzero */ | |
2745 Zero(&aldouble, 1, long double); | |
2746 while (len-- > 0) { | |
2747 fromstr = NEXTFROM; | |
2748 # ifdef __GNUC__ | |
2749 /* to work round a gcc/x86 bug; don't use SvNV */ | |
2750 aldouble.ld = (long double)sv_2nv(fromstr); | |
2751 # if defined(LONGDOUBLE_X86_80_BIT) && LONG_DOUBLESIZE > 10 | |
2752 /* GCC sometimes overwrites the padding in the | |
2753 assignment above */ | |
2754 Zero(aldouble.bytes+10, sizeof(aldouble.bytes) - 10, U8); | |
2755 # endif | |
2756 # else | |
2757 aldouble.ld = (long double)SvNV(fromstr); | |
2758 # endif | |
2759 PUSH_BYTES(utf8, cur, aldouble.bytes, sizeof(aldouble.bytes), | |
2760 needs_swap); | |
2761 } | |
2762 break; | |
2763 } | |
2764 #endif | |
2765 case 'n' | TYPE_IS_SHRIEKING: | |
2766 case 'n': | |
2767 while (len-- > 0) { | |
2768 I16 ai16; | |
2769 fromstr = NEXTFROM; | |
2770 ai16 = (I16)SvIV_no_inf(fromstr, datumtype); | |
2771 ai16 = PerlSock_htons(ai16); | |
2772 PUSH16(utf8, cur, &ai16, FALSE); | |
2773 } | |
2774 break; | |
2775 case 'v' | TYPE_IS_SHRIEKING: | |
2776 case 'v': | |
2777 while (len-- > 0) { | |
2778 I16 ai16; | |
2779 fromstr = NEXTFROM; | |
2780 ai16 = (I16)SvIV_no_inf(fromstr, datumtype); | |
2781 ai16 = htovs(ai16); | |
2782 PUSH16(utf8, cur, &ai16, FALSE); | |
2783 } | |
2784 break; | |
2785 case 'S' | TYPE_IS_SHRIEKING: | |
2786 #if SHORTSIZE != SIZE16 | |
2787 while (len-- > 0) { | |
2788 unsigned short aushort; | |
2789 fromstr = NEXTFROM; | |
2790 aushort = SvUV_no_inf(fromstr, datumtype); | |
2791 PUSH_VAR(utf8, cur, aushort, needs_swap); | |
2792 } | |
2793 break; | |
2794 #else | |
2795 /* FALLTHROUGH */ | |
2796 #endif | |
2797 case 'S': | |
2798 while (len-- > 0) { | |
2799 U16 au16; | |
2800 fromstr = NEXTFROM; | |
2801 au16 = (U16)SvUV_no_inf(fromstr, datumtype); | |
2802 PUSH16(utf8, cur, &au16, needs_swap); | |
2803 } | |
2804 break; | |
2805 case 's' | TYPE_IS_SHRIEKING: | |
2806 #if SHORTSIZE != SIZE16 | |
2807 while (len-- > 0) { | |
2808 short ashort; | |
2809 fromstr = NEXTFROM; | |
2810 ashort = SvIV_no_inf(fromstr, datumtype); | |
2811 PUSH_VAR(utf8, cur, ashort, needs_swap); | |
2812 } | |
2813 break; | |
2814 #else | |
2815 /* FALLTHROUGH */ | |
2816 #endif | |
2817 case 's': | |
2818 while (len-- > 0) { | |
2819 I16 ai16; | |
2820 fromstr = NEXTFROM; | |
2821 ai16 = (I16)SvIV_no_inf(fromstr, datumtype); | |
2822 PUSH16(utf8, cur, &ai16, needs_swap); | |
2823 } | |
2824 break; | |
2825 case 'I': | |
2826 case 'I' | TYPE_IS_SHRIEKING: | |
2827 while (len-- > 0) { | |
2828 unsigned int auint; | |
2829 fromstr = NEXTFROM; | |
2830 auint = SvUV_no_inf(fromstr, datumtype); | |
2831 PUSH_VAR(utf8, cur, auint, needs_swap); | |
2832 } | |
2833 break; | |
2834 case 'j': | |
2835 while (len-- > 0) { | |
2836 IV aiv; | |
2837 fromstr = NEXTFROM; | |
2838 aiv = SvIV_no_inf(fromstr, datumtype); | |
2839 PUSH_VAR(utf8, cur, aiv, needs_swap); | |
2840 } | |
2841 break; | |
2842 case 'J': | |
2843 while (len-- > 0) { | |
2844 UV auv; | |
2845 fromstr = NEXTFROM; | |
2846 auv = SvUV_no_inf(fromstr, datumtype); | |
2847 PUSH_VAR(utf8, cur, auv, needs_swap); | |
2848 } | |
2849 break; | |
2850 case 'w': | |
2851 while (len-- > 0) { | |
2852 NV anv; | |
2853 fromstr = NEXTFROM; | |
2854 S_sv_check_infnan(aTHX_ fromstr, datumtype); | |
2855 anv = SvNV_nomg(fromstr); | |
2856 | |
2857 if (anv < 0) { | |
2858 *cur = '\0'; | |
2859 SvCUR_set(cat, cur - start); | |
2860 Perl_croak(aTHX_ "Cannot compress negative numbers in pack"); | |
2861 } | |
2862 | |
2863 /* 0xFFFFFFFFFFFFFFFF may cast to 18446744073709551616.0, | |
2864 which is == UV_MAX_P1. IOK is fine (instead of UV_only), as | |
2865 any negative IVs will have already been got by the croak() | |
2866 above. IOK is untrue for fractions, so we test them | |
2867 against UV_MAX_P1. */ | |
2868 if (SvIOK(fromstr) || anv < UV_MAX_P1) { | |
2869 char buf[(sizeof(UV)*CHAR_BIT)/7+1]; | |
2870 char *in = buf + sizeof(buf); | |
2871 UV auv = SvUV_nomg(fromstr); | |
2872 | |
2873 do { | |
2874 *--in = (char)((auv & 0x7f) | 0x80); | |
2875 auv >>= 7; | |
2876 } while (auv); | |
2877 buf[sizeof(buf) - 1] &= 0x7f; /* clear continue bit */ | |
2878 PUSH_GROWING_BYTES(utf8, cat, start, cur, | |
2879 in, (buf + sizeof(buf)) - in); | |
2880 } else if (SvPOKp(fromstr)) | |
2881 goto w_string; | |
2882 else if (SvNOKp(fromstr)) { | |
2883 /* 10**NV_MAX_10_EXP is the largest power of 10 | |
2884 so 10**(NV_MAX_10_EXP+1) is definitely unrepresentable | |
2885 given 10**(NV_MAX_10_EXP+1) == 128 ** x solve for x: | |
2886 x = (NV_MAX_10_EXP+1) * log (10) / log (128) | |
2887 And with that many bytes only Inf can overflow. | |
2888 Some C compilers are strict about integral constant | |
2889 expressions so we conservatively divide by a slightly | |
2890 smaller integer instead of multiplying by the exact | |
2891 floating-point value. | |
2892 */ | |
2893 #ifdef NV_MAX_10_EXP | |
2894 /* char buf[1 + (int)((NV_MAX_10_EXP + 1) * 0.47456)]; -- invalid C */ | |
2895 char buf[1 + (int)((NV_MAX_10_EXP + 1) / 2)]; /* valid C */ | |
2896 #else | |
2897 /* char buf[1 + (int)((308 + 1) * 0.47456)]; -- invalid C */ | |
2898 char buf[1 + (int)((308 + 1) / 2)]; /* valid C */ | |
2899 #endif | |
2900 char *in = buf + sizeof(buf); | |
2901 | |
2902 anv = Perl_floor(anv); | |
2903 do { | |
2904 const NV next = Perl_floor(anv / 128); | |
2905 if (in <= buf) /* this cannot happen ;-) */ | |
2906 Perl_croak(aTHX_ "Cannot compress integer in pack"); | |
2907 *--in = (unsigned char)(anv - (next * 128)) | 0x80; | |
2908 anv = next; | |
2909 } while (anv > 0); | |
2910 buf[sizeof(buf) - 1] &= 0x7f; /* clear continue bit */ | |
2911 PUSH_GROWING_BYTES(utf8, cat, start, cur, | |
2912 in, (buf + sizeof(buf)) - in); | |
2913 } else { | |
2914 const char *from; | |
2915 char *result, *in; | |
2916 SV *norm; | |
2917 STRLEN len; | |
2918 bool done; | |
2919 | |
2920 w_string: | |
2921 /* Copy string and check for compliance */ | |
2922 from = SvPV_nomg_const(fromstr, len); | |
2923 if ((norm = is_an_int(from, len)) == NULL) | |
2924 Perl_croak(aTHX_ "Can only compress unsigned integers in pack"); | |
2925 | |
2926 Newx(result, len, char); | |
2927 in = result + len; | |
2928 done = FALSE; | |
2929 while (!done) *--in = div128(norm, &done) | 0x80; | |
2930 result[len - 1] &= 0x7F; /* clear continue bit */ | |
2931 PUSH_GROWING_BYTES(utf8, cat, start, cur, | |
2932 in, (result + len) - in); | |
2933 Safefree(result); | |
2934 SvREFCNT_dec(norm); /* free norm */ | |
2935 } | |
2936 } | |
2937 break; | |
2938 case 'i': | |
2939 case 'i' | TYPE_IS_SHRIEKING: | |
2940 while (len-- > 0) { | |
2941 int aint; | |
2942 fromstr = NEXTFROM; | |
2943 aint = SvIV_no_inf(fromstr, datumtype); | |
2944 PUSH_VAR(utf8, cur, aint, needs_swap); | |
2945 } | |
2946 break; | |
2947 case 'N' | TYPE_IS_SHRIEKING: | |
2948 case 'N': | |
2949 while (len-- > 0) { | |
2950 U32 au32; | |
2951 fromstr = NEXTFROM; | |
2952 au32 = SvUV_no_inf(fromstr, datumtype); | |
2953 au32 = PerlSock_htonl(au32); | |
2954 PUSH32(utf8, cur, &au32, FALSE); | |
2955 } | |
2956 break; | |
2957 case 'V' | TYPE_IS_SHRIEKING: | |
2958 case 'V': | |
2959 while (len-- > 0) { | |
2960 U32 au32; | |
2961 fromstr = NEXTFROM; | |
2962 au32 = SvUV_no_inf(fromstr, datumtype); | |
2963 au32 = htovl(au32); | |
2964 PUSH32(utf8, cur, &au32, FALSE); | |
2965 } | |
2966 break; | |
2967 case 'L' | TYPE_IS_SHRIEKING: | |
2968 #if LONGSIZE != SIZE32 | |
2969 while (len-- > 0) { | |
2970 unsigned long aulong; | |
2971 fromstr = NEXTFROM; | |
2972 aulong = SvUV_no_inf(fromstr, datumtype); | |
2973 PUSH_VAR(utf8, cur, aulong, needs_swap); | |
2974 } | |
2975 break; | |
2976 #else | |
2977 /* Fall though! */ | |
2978 #endif | |
2979 case 'L': | |
2980 while (len-- > 0) { | |
2981 U32 au32; | |
2982 fromstr = NEXTFROM; | |
2983 au32 = SvUV_no_inf(fromstr, datumtype); | |
2984 PUSH32(utf8, cur, &au32, needs_swap); | |
2985 } | |
2986 break; | |
2987 case 'l' | TYPE_IS_SHRIEKING: | |
2988 #if LONGSIZE != SIZE32 | |
2989 while (len-- > 0) { | |
2990 long along; | |
2991 fromstr = NEXTFROM; | |
2992 along = SvIV_no_inf(fromstr, datumtype); | |
2993 PUSH_VAR(utf8, cur, along, needs_swap); | |
2994 } | |
2995 break; | |
2996 #else | |
2997 /* Fall though! */ | |
2998 #endif | |
2999 case 'l': | |
3000 while (len-- > 0) { | |
3001 I32 ai32; | |
3002 fromstr = NEXTFROM; | |
3003 ai32 = SvIV_no_inf(fromstr, datumtype); | |
3004 PUSH32(utf8, cur, &ai32, needs_swap); | |
3005 } | |
3006 break; | |
3007 #if defined(HAS_QUAD) && IVSIZE >= 8 | |
3008 case 'Q': | |
3009 while (len-- > 0) { | |
3010 Uquad_t auquad; | |
3011 fromstr = NEXTFROM; | |
3012 auquad = (Uquad_t) SvUV_no_inf(fromstr, datumtype); | |
3013 PUSH_VAR(utf8, cur, auquad, needs_swap); | |
3014 } | |
3015 break; | |
3016 case 'q': | |
3017 while (len-- > 0) { | |
3018 Quad_t aquad; | |
3019 fromstr = NEXTFROM; | |
3020 aquad = (Quad_t)SvIV_no_inf(fromstr, datumtype); | |
3021 PUSH_VAR(utf8, cur, aquad, needs_swap); | |
3022 } | |
3023 break; | |
3024 #endif | |
3025 case 'P': | |
3026 len = 1; /* assume SV is correct length */ | |
3027 GROWING(utf8, cat, start, cur, sizeof(char *)); | |
3028 /* FALLTHROUGH */ | |
3029 case 'p': | |
3030 while (len-- > 0) { | |
3031 const char *aptr; | |
3032 | |
3033 fromstr = NEXTFROM; | |
3034 SvGETMAGIC(fromstr); | |
3035 if (!SvOK(fromstr)) aptr = NULL; | |
3036 else { | |
3037 /* XXX better yet, could spirit away the string to | |
3038 * a safe spot and hang on to it until the result | |
3039 * of pack() (and all copies of the result) are | |
3040 * gone. | |
3041 */ | |
3042 if ((SvTEMP(fromstr) || (SvPADTMP(fromstr) && | |
3043 !SvREADONLY(fromstr)))) { | |
3044 Perl_ck_warner(aTHX_ packWARN(WARN_PACK), | |
3045 "Attempt to pack pointer to temporary value"); | |
3046 } | |
3047 if (SvPOK(fromstr) || SvNIOK(fromstr)) | |
3048 aptr = SvPV_nomg_const_nolen(fromstr); | |
3049 else | |
3050 aptr = SvPV_force_flags_nolen(fromstr, 0); | |
3051 } | |
3052 PUSH_VAR(utf8, cur, aptr, needs_swap); | |
3053 } | |
3054 break; | |
3055 case 'u': { | |
3056 const char *aptr, *aend; | |
3057 bool from_utf8; | |
3058 | |
3059 fromstr = NEXTFROM; | |
3060 if (len <= 2) len = 45; | |
3061 else len = len / 3 * 3; | |
3062 if (len >= 64) { | |
3063 Perl_ck_warner(aTHX_ packWARN(WARN_PACK), | |
3064 "Field too wide in 'u' format in pack"); | |
3065 len = 63; | |
3066 } | |
3067 aptr = SvPV_const(fromstr, fromlen); | |
3068 from_utf8 = DO_UTF8(fromstr); | |
3069 if (from_utf8) { | |
3070 aend = aptr + fromlen; | |
3071 fromlen = sv_len_utf8_nomg(fromstr); | |
3072 } else aend = NULL; /* Unused, but keep compilers happy */ | |
3073 GROWING(utf8, cat, start, cur, (fromlen+2) / 3 * 4 + (fromlen+len-1)/len * 2); | |
3074 while (fromlen > 0) { | |
3075 U8 *end; | |
3076 I32 todo; | |
3077 U8 hunk[1+63/3*4+1]; | |
3078 | |
3079 if ((I32)fromlen > len) | |
3080 todo = len; | |
3081 else | |
3082 todo = fromlen; | |
3083 if (from_utf8) { | |
3084 char buffer[64]; | |
3085 if (!S_utf8_to_bytes(aTHX_ &aptr, aend, buffer, todo, | |
3086 'u' | TYPE_IS_PACK)) { | |
3087 *cur = '\0'; | |
3088 SvCUR_set(cat, cur - start); | |
3089 Perl_croak(aTHX_ "panic: string is shorter than advertised, " | |
3090 "aptr=%p, aend=%p, buffer=%p, todo=%ld", | |
3091 aptr, aend, buffer, (long) todo); | |
3092 } | |
3093 end = doencodes(hunk, (const U8 *)buffer, todo); | |
3094 } else { | |
3095 end = doencodes(hunk, (const U8 *)aptr, todo); | |
3096 aptr += todo; | |
3097 } | |
3098 PUSH_BYTES(utf8, cur, hunk, end-hunk, 0); | |
3099 fromlen -= todo; | |
3100 } | |
3101 break; | |
3102 } | |
3103 } | |
3104 *cur = '\0'; | |
3105 SvCUR_set(cat, cur - start); | |
3106 no_change: | |
3107 *symptr = lookahead; | |
3108 } | |
3109 return beglist; | |
3110 } | |
3111 #undef NEXTFROM | |
3112 | |
3113 | |
3114 PP(pp_pack) | |
3115 { | |
3116 dSP; dMARK; dORIGMARK; dTARGET; | |
3117 SV *cat = TARG; | |
3118 STRLEN fromlen; | |
3119 SV *pat_sv = *++MARK; | |
3120 const char *pat = SvPV_const(pat_sv, fromlen); | |
3121 const char *patend = pat + fromlen; | |
3122 | |
3123 MARK++; | |
3124 sv_setpvs(cat, ""); | |
3125 SvUTF8_off(cat); | |
3126 | |
3127 packlist(cat, pat, patend, MARK, SP + 1); | |
3128 | |
3129 SvSETMAGIC(cat); | |
3130 SP = ORIGMARK; | |
3131 PUSHs(cat); | |
3132 RETURN; | |
3133 } | |
3134 | |
3135 /* | |
3136 * ex: set ts=8 sts=4 sw=4 et: | |
3137 */ |