1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
|
/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define CAML_INTERNALS
/* Structured output */
/* The interface of this file is "caml/intext.h" */
#include <string.h>
#include "caml/alloc.h"
#include "caml/config.h"
#include "caml/custom.h"
#include "caml/fail.h"
#include "caml/gc.h"
#include "caml/intext.h"
#include "caml/io.h"
#include "caml/md5.h"
#include "caml/memory.h"
#include "caml/misc.h"
#include "caml/mlvalues.h"
#include "caml/reverse.h"
static uintnat obj_counter; /* Number of objects emitted so far */
static uintnat size_32; /* Size in words of 32-bit block for struct. */
static uintnat size_64; /* Size in words of 64-bit block for struct. */
/* Flags affecting marshaling */
enum {
NO_SHARING = 1, /* Flag to ignore sharing */
CLOSURES = 2, /* Flag to allow marshaling code pointers */
COMPAT_32 = 4 /* Flag to ensure that output can safely
be read back on a 32-bit platform */
};
static int extern_flags; /* logical or of some of the flags above */
/* Trail mechanism to undo forwarding pointers put inside objects */
struct trail_entry {
value obj; /* address of object + initial color in low 2 bits */
value field0; /* initial contents of field 0 */
};
struct trail_block {
struct trail_block * previous;
struct trail_entry entries[ENTRIES_PER_TRAIL_BLOCK];
};
static struct trail_block extern_trail_first;
static struct trail_block * extern_trail_block;
static struct trail_entry * extern_trail_cur, * extern_trail_limit;
/* Stack for pending values to marshal */
struct extern_item { value * v; mlsize_t count; };
#define EXTERN_STACK_INIT_SIZE 256
#define EXTERN_STACK_MAX_SIZE (1024*1024*100)
static struct extern_item extern_stack_init[EXTERN_STACK_INIT_SIZE];
static struct extern_item * extern_stack = extern_stack_init;
static struct extern_item * extern_stack_limit = extern_stack_init
+ EXTERN_STACK_INIT_SIZE;
/* Forward declarations */
CAMLnoreturn_start
static void extern_out_of_memory(void)
CAMLnoreturn_end;
CAMLnoreturn_start
static void extern_invalid_argument(char *msg)
CAMLnoreturn_end;
CAMLnoreturn_start
static void extern_failwith(char *msg)
CAMLnoreturn_end;
CAMLnoreturn_start
static void extern_stack_overflow(void)
CAMLnoreturn_end;
static void extern_replay_trail(void);
static void free_extern_output(void);
/* Free the extern stack if needed */
static void extern_free_stack(void)
{
if (extern_stack != extern_stack_init) {
free(extern_stack);
/* Reinitialize the globals for next time around */
extern_stack = extern_stack_init;
extern_stack_limit = extern_stack + EXTERN_STACK_INIT_SIZE;
}
}
static struct extern_item * extern_resize_stack(struct extern_item * sp)
{
asize_t newsize = 2 * (extern_stack_limit - extern_stack);
asize_t sp_offset = sp - extern_stack;
struct extern_item * newstack;
if (newsize >= EXTERN_STACK_MAX_SIZE) extern_stack_overflow();
if (extern_stack == extern_stack_init) {
newstack = malloc(sizeof(struct extern_item) * newsize);
if (newstack == NULL) extern_stack_overflow();
memcpy(newstack, extern_stack_init,
sizeof(struct extern_item) * EXTERN_STACK_INIT_SIZE);
} else {
newstack =
realloc(extern_stack, sizeof(struct extern_item) * newsize);
if (newstack == NULL) extern_stack_overflow();
}
extern_stack = newstack;
extern_stack_limit = newstack + newsize;
return newstack + sp_offset;
}
/* Initialize the trail */
static void init_extern_trail(void)
{
extern_trail_block = &extern_trail_first;
extern_trail_cur = extern_trail_block->entries;
extern_trail_limit = extern_trail_block->entries + ENTRIES_PER_TRAIL_BLOCK;
}
/* Replay the trail, undoing the in-place modifications
performed on objects */
static void extern_replay_trail(void)
{
struct trail_block * blk, * prevblk;
struct trail_entry * ent, * lim;
blk = extern_trail_block;
lim = extern_trail_cur;
while (1) {
for (ent = &(blk->entries[0]); ent < lim; ent++) {
value obj = ent->obj;
color_t colornum = obj & 3;
obj = obj & ~3;
Hd_val(obj) = Coloredhd_hd(Hd_val(obj), colornum);
Field(obj, 0) = ent->field0;
}
if (blk == &extern_trail_first) break;
prevblk = blk->previous;
free(blk);
blk = prevblk;
lim = &(blk->entries[ENTRIES_PER_TRAIL_BLOCK]);
}
/* Protect against a second call to extern_replay_trail */
extern_trail_block = &extern_trail_first;
extern_trail_cur = extern_trail_block->entries;
}
/* Set forwarding pointer on an object and add corresponding entry
to the trail. */
static void extern_record_location(value obj)
{
header_t hdr;
if (extern_flags & NO_SHARING) return;
if (extern_trail_cur == extern_trail_limit) {
struct trail_block * new_block = malloc(sizeof(struct trail_block));
if (new_block == NULL) extern_out_of_memory();
new_block->previous = extern_trail_block;
extern_trail_block = new_block;
extern_trail_cur = extern_trail_block->entries;
extern_trail_limit = extern_trail_block->entries + ENTRIES_PER_TRAIL_BLOCK;
}
hdr = Hd_val(obj);
extern_trail_cur->obj = obj | Colornum_hd(hdr);
extern_trail_cur->field0 = Field(obj, 0);
extern_trail_cur++;
Hd_val(obj) = Bluehd_hd(hdr);
Field(obj, 0) = (value) obj_counter;
obj_counter++;
}
/* To buffer the output */
static char * extern_userprovided_output;
static char * extern_ptr, * extern_limit;
struct output_block {
struct output_block * next;
char * end;
char data[SIZE_EXTERN_OUTPUT_BLOCK];
};
static struct output_block * extern_output_first, * extern_output_block;
static void init_extern_output(void)
{
extern_userprovided_output = NULL;
extern_output_first = malloc(sizeof(struct output_block));
if (extern_output_first == NULL) caml_raise_out_of_memory();
extern_output_block = extern_output_first;
extern_output_block->next = NULL;
extern_ptr = extern_output_block->data;
extern_limit = extern_output_block->data + SIZE_EXTERN_OUTPUT_BLOCK;
}
static void close_extern_output(void)
{
if (extern_userprovided_output == NULL){
extern_output_block->end = extern_ptr;
}
}
static void free_extern_output(void)
{
struct output_block * blk, * nextblk;
if (extern_userprovided_output != NULL) return;
for (blk = extern_output_first; blk != NULL; blk = nextblk) {
nextblk = blk->next;
free(blk);
}
extern_output_first = NULL;
extern_free_stack();
}
static void grow_extern_output(intnat required)
{
struct output_block * blk;
intnat extra;
if (extern_userprovided_output != NULL) {
extern_failwith("Marshal.to_buffer: buffer overflow");
}
extern_output_block->end = extern_ptr;
if (required <= SIZE_EXTERN_OUTPUT_BLOCK / 2)
extra = 0;
else
extra = required;
blk = malloc(sizeof(struct output_block) + extra);
if (blk == NULL) extern_out_of_memory();
extern_output_block->next = blk;
extern_output_block = blk;
extern_output_block->next = NULL;
extern_ptr = extern_output_block->data;
extern_limit = extern_output_block->data + SIZE_EXTERN_OUTPUT_BLOCK + extra;
}
static intnat extern_output_length(void)
{
struct output_block * blk;
intnat len;
if (extern_userprovided_output != NULL) {
return extern_ptr - extern_userprovided_output;
} else {
for (len = 0, blk = extern_output_first; blk != NULL; blk = blk->next)
len += blk->end - blk->data;
return len;
}
}
/* Exception raising, with cleanup */
static void extern_out_of_memory(void)
{
extern_replay_trail();
free_extern_output();
caml_raise_out_of_memory();
}
static void extern_invalid_argument(char *msg)
{
extern_replay_trail();
free_extern_output();
caml_invalid_argument(msg);
}
static void extern_failwith(char *msg)
{
extern_replay_trail();
free_extern_output();
caml_failwith(msg);
}
static void extern_stack_overflow(void)
{
caml_gc_message (0x04, "Stack overflow in marshaling value\n", 0);
extern_replay_trail();
free_extern_output();
caml_raise_out_of_memory();
}
/* Conversion to big-endian */
static inline void store16(char * dst, int n)
{
dst[0] = n >> 8; dst[1] = n;
}
static inline void store32(char * dst, intnat n)
{
dst[0] = n >> 24; dst[1] = n >> 16; dst[2] = n >> 8; dst[3] = n;
}
static inline void store64(char * dst, int64_t n)
{
dst[0] = n >> 56; dst[1] = n >> 48; dst[2] = n >> 40; dst[3] = n >> 32;
dst[4] = n >> 24; dst[5] = n >> 16; dst[6] = n >> 8; dst[7] = n;
}
/* Write characters, integers, and blocks in the output buffer */
static inline void write(int c)
{
if (extern_ptr >= extern_limit) grow_extern_output(1);
*extern_ptr++ = c;
}
static void writeblock(char * data, intnat len)
{
if (extern_ptr + len > extern_limit) grow_extern_output(len);
memcpy(extern_ptr, data, len);
extern_ptr += len;
}
static inline void writeblock_float8(double * data, intnat ndoubles)
{
#if ARCH_FLOAT_ENDIANNESS == 0x01234567 || ARCH_FLOAT_ENDIANNESS == 0x76543210
writeblock((char *) data, ndoubles * 8);
#else
caml_serialize_block_float_8(data, ndoubles);
#endif
}
static void writecode8(int code, intnat val)
{
if (extern_ptr + 2 > extern_limit) grow_extern_output(2);
extern_ptr[0] = code;
extern_ptr[1] = val;
extern_ptr += 2;
}
static void writecode16(int code, intnat val)
{
if (extern_ptr + 3 > extern_limit) grow_extern_output(3);
extern_ptr[0] = code;
store16(extern_ptr + 1, val);
extern_ptr += 3;
}
static void writecode32(int code, intnat val)
{
if (extern_ptr + 5 > extern_limit) grow_extern_output(5);
extern_ptr[0] = code;
store32(extern_ptr + 1, val);
extern_ptr += 5;
}
#ifdef ARCH_SIXTYFOUR
static void writecode64(int code, intnat val)
{
if (extern_ptr + 9 > extern_limit) grow_extern_output(9);
extern_ptr[0] = code;
store64(extern_ptr + 1, val);
extern_ptr += 9;
}
#endif
/* Marshal the given value in the output buffer */
int caml_extern_allow_out_of_heap = 0;
static void extern_rec(value v)
{
struct code_fragment * cf;
struct extern_item * sp;
sp = extern_stack;
while(1) {
if (Is_long(v)) {
intnat n = Long_val(v);
if (n >= 0 && n < 0x40) {
write(PREFIX_SMALL_INT + n);
} else if (n >= -(1 << 7) && n < (1 << 7)) {
writecode8(CODE_INT8, n);
} else if (n >= -(1 << 15) && n < (1 << 15)) {
writecode16(CODE_INT16, n);
#ifdef ARCH_SIXTYFOUR
} else if (n < -((intnat)1 << 30) || n >= ((intnat)1 << 30)) {
if (extern_flags & COMPAT_32)
extern_failwith("output_value: integer cannot be read back on "
"32-bit platform");
writecode64(CODE_INT64, n);
#endif
} else
writecode32(CODE_INT32, n);
goto next_item;
}
if (Is_in_value_area(v) || caml_extern_allow_out_of_heap) {
header_t hd = Hd_val(v);
tag_t tag = Tag_hd(hd);
mlsize_t sz = Wosize_hd(hd);
if (tag == Forward_tag) {
value f = Forward_val (v);
if (Is_block (f)
&& (!Is_in_value_area(f) || Tag_val (f) == Forward_tag
|| Tag_val (f) == Lazy_tag || Tag_val (f) == Double_tag)){
/* Do not short-circuit the pointer. */
}else{
v = f;
continue;
}
}
/* Atoms are treated specially for two reasons: they are not allocated
in the externed block, and they are automatically shared. */
if (sz == 0) {
if (tag < 16) {
write(PREFIX_SMALL_BLOCK + tag);
} else {
#ifdef WITH_PROFINFO
writecode32(CODE_BLOCK32, Hd_no_profinfo(hd));
#else
writecode32(CODE_BLOCK32, hd);
#endif
}
goto next_item;
}
/* Check if already seen */
if (Color_hd(hd) == Caml_blue) {
uintnat d = obj_counter - (uintnat) Field(v, 0);
if (d < 0x100) {
writecode8(CODE_SHARED8, d);
} else if (d < 0x10000) {
writecode16(CODE_SHARED16, d);
#ifdef ARCH_SIXTYFOUR
} else if (d >= (uintnat)1 << 32) {
writecode64(CODE_SHARED64, d);
#endif
} else {
writecode32(CODE_SHARED32, d);
}
goto next_item;
}
/* Output the contents of the object */
switch(tag) {
case String_tag: {
mlsize_t len = caml_string_length(v);
if (len < 0x20) {
write(PREFIX_SMALL_STRING + len);
} else if (len < 0x100) {
writecode8(CODE_STRING8, len);
} else {
#ifdef ARCH_SIXTYFOUR
if (len > 0xFFFFFB && (extern_flags & COMPAT_32))
extern_failwith("output_value: string cannot be read back on "
"32-bit platform");
if (len < (uintnat)1 << 32)
writecode32(CODE_STRING32, len);
else
writecode64(CODE_STRING64, len);
#else
writecode32(CODE_STRING32, len);
#endif
}
writeblock(String_val(v), len);
size_32 += 1 + (len + 4) / 4;
size_64 += 1 + (len + 8) / 8;
extern_record_location(v);
break;
}
case Double_tag: {
if (sizeof(double) != 8)
extern_invalid_argument("output_value: non-standard floats");
write(CODE_DOUBLE_NATIVE);
writeblock_float8((double *) v, 1);
size_32 += 1 + 2;
size_64 += 1 + 1;
extern_record_location(v);
break;
}
case Double_array_tag: {
mlsize_t nfloats;
if (sizeof(double) != 8)
extern_invalid_argument("output_value: non-standard floats");
nfloats = Wosize_val(v) / Double_wosize;
if (nfloats < 0x100) {
writecode8(CODE_DOUBLE_ARRAY8_NATIVE, nfloats);
} else {
#ifdef ARCH_SIXTYFOUR
if (nfloats > 0x1FFFFF && (extern_flags & COMPAT_32))
extern_failwith("output_value: float array cannot be read back on "
"32-bit platform");
if (nfloats < (uintnat) 1 << 32)
writecode32(CODE_DOUBLE_ARRAY32_NATIVE, nfloats);
else
writecode64(CODE_DOUBLE_ARRAY64_NATIVE, nfloats);
#else
writecode32(CODE_DOUBLE_ARRAY32_NATIVE, nfloats);
#endif
}
writeblock_float8((double *) v, nfloats);
size_32 += 1 + nfloats * 2;
size_64 += 1 + nfloats;
extern_record_location(v);
break;
}
case Abstract_tag:
extern_invalid_argument("output_value: abstract value (Abstract)");
break;
case Infix_tag:
writecode32(CODE_INFIXPOINTER, Infix_offset_hd(hd));
v = v - Infix_offset_hd(hd); /* PR#5772 */
continue;
case Custom_tag: {
uintnat sz_32, sz_64;
char * ident = Custom_ops_val(v)->identifier;
void (*serialize)(value v, uintnat * bsize_32,
uintnat * bsize_64)
= Custom_ops_val(v)->serialize;
if (serialize == NULL)
extern_invalid_argument("output_value: abstract value (Custom)");
write(CODE_CUSTOM);
writeblock(ident, strlen(ident) + 1);
Custom_ops_val(v)->serialize(v, &sz_32, &sz_64);
size_32 += 2 + ((sz_32 + 3) >> 2); /* header + ops + data */
size_64 += 2 + ((sz_64 + 7) >> 3);
extern_record_location(v);
break;
}
default: {
value field0;
if (tag < 16 && sz < 8) {
write(PREFIX_SMALL_BLOCK + tag + (sz << 4));
} else {
#ifdef ARCH_SIXTYFOUR
#ifdef WITH_PROFINFO
header_t hd_erased = Hd_no_profinfo(hd);
#else
header_t hd_erased = hd;
#endif
if (sz > 0x3FFFFF && (extern_flags & COMPAT_32))
extern_failwith("output_value: array cannot be read back on "
"32-bit platform");
if (hd_erased < (uintnat)1 << 32)
writecode32(CODE_BLOCK32, Whitehd_hd (hd_erased));
else
writecode64(CODE_BLOCK64, Whitehd_hd (hd_erased));
#else
writecode32(CODE_BLOCK32, Whitehd_hd (hd));
#endif
}
size_32 += 1 + sz;
size_64 += 1 + sz;
field0 = Field(v, 0);
extern_record_location(v);
/* Remember that we still have to serialize fields 1 ... sz - 1 */
if (sz > 1) {
sp++;
if (sp >= extern_stack_limit) sp = extern_resize_stack(sp);
sp->v = &Field(v,1);
sp->count = sz-1;
}
/* Continue serialization with the first field */
v = field0;
continue;
}
}
}
else if ((cf = caml_extern_find_code((char *) v)) != NULL) {
if ((extern_flags & CLOSURES) == 0)
extern_invalid_argument("output_value: functional value");
writecode32(CODE_CODEPOINTER, (char *) v - cf->code_start);
writeblock((char *) cf->digest, 16);
} else {
extern_invalid_argument("output_value: abstract value (outside heap)");
}
next_item:
/* Pop one more item to marshal, if any */
if (sp == extern_stack) {
/* We are done. Cleanup the stack and leave the function */
extern_free_stack();
return;
}
v = *((sp->v)++);
if (--(sp->count) == 0) sp--;
}
/* Never reached as function leaves with return */
}
static int extern_flag_values[] = { NO_SHARING, CLOSURES, COMPAT_32 };
static intnat extern_value(value v, value flags,
/*out*/ char header[32],
/*out*/ int * header_len)
{
intnat res_len;
/* Parse flag list */
extern_flags = caml_convert_flag_list(flags, extern_flag_values);
/* Initializations */
init_extern_trail();
obj_counter = 0;
size_32 = 0;
size_64 = 0;
/* Marshal the object */
extern_rec(v);
/* Record end of output */
close_extern_output();
/* Undo the modifications done on externed blocks */
extern_replay_trail();
/* Write the header */
res_len = extern_output_length();
#ifdef ARCH_SIXTYFOUR
if (res_len >= ((intnat)1 << 32) ||
size_32 >= ((intnat)1 << 32) || size_64 >= ((intnat)1 << 32)) {
/* The object is too big for the small header format.
Fail if we are in compat32 mode, or use big header. */
if (extern_flags & COMPAT_32) {
free_extern_output();
caml_failwith("output_value: object too big to be read back on "
"32-bit platform");
}
store32(header, Intext_magic_number_big);
store32(header + 4, 0);
store64(header + 8, res_len);
store64(header + 16, obj_counter);
store64(header + 24, size_64);
*header_len = 32;
return res_len;
}
#endif
/* Use the small header format */
store32(header, Intext_magic_number_small);
store32(header + 4, res_len);
store32(header + 8, obj_counter);
store32(header + 12, size_32);
store32(header + 16, size_64);
*header_len = 20;
return res_len;
}
void caml_output_val(struct channel *chan, value v, value flags)
{
char header[32];
int header_len;
struct output_block * blk, * nextblk;
if (! caml_channel_binary_mode(chan))
caml_failwith("output_value: not a binary channel");
init_extern_output();
extern_value(v, flags, header, &header_len);
/* During [caml_really_putblock], concurrent [caml_output_val] operations
can take place (via signal handlers or context switching in systhreads),
and [extern_output_first] may change. So, save it in a local variable. */
blk = extern_output_first;
caml_really_putblock(chan, header, header_len);
while (blk != NULL) {
caml_really_putblock(chan, blk->data, blk->end - blk->data);
nextblk = blk->next;
free(blk);
blk = nextblk;
}
}
CAMLprim value caml_output_value(value vchan, value v, value flags)
{
CAMLparam3 (vchan, v, flags);
struct channel * channel = Channel(vchan);
Lock(channel);
caml_output_val(channel, v, flags);
Unlock(channel);
CAMLreturn (Val_unit);
}
CAMLprim value caml_output_value_to_string(value v, value flags)
{
char header[32];
int header_len;
intnat data_len, ofs;
value res;
struct output_block * blk, * nextblk;
init_extern_output();
data_len = extern_value(v, flags, header, &header_len);
/* PR#4030: it is prudent to save extern_output_first before allocating
the result, as in caml_output_val */
blk = extern_output_first;
res = caml_alloc_string(header_len + data_len);
ofs = 0;
memcpy(&Byte(res, ofs), header, header_len);
ofs += header_len;
while (blk != NULL) {
int n = blk->end - blk->data;
memcpy(&Byte(res, ofs), blk->data, n);
ofs += n;
nextblk = blk->next;
free(blk);
blk = nextblk;
}
return res;
}
CAMLexport intnat caml_output_value_to_block(value v, value flags,
char * buf, intnat len)
{
char header[32];
int header_len;
intnat data_len;
/* At this point we don't know the size of the header.
Guess that it is small, and fix up later if not. */
extern_userprovided_output = buf + 20;
extern_ptr = extern_userprovided_output;
extern_limit = buf + len;
data_len = extern_value(v, flags, header, &header_len);
if (header_len != 20) {
/* Bad guess! Need to shift the output to make room for big header.
Make sure there is room. */
if (header_len + data_len > len)
caml_failwith("Marshal.to_buffer: buffer overflow");
memmove(buf + header_len, buf + 20, data_len);
}
memcpy(buf, header, header_len);
return header_len + data_len;
}
CAMLprim value caml_output_value_to_buffer(value buf, value ofs, value len,
value v, value flags)
{
intnat l =
caml_output_value_to_block(v, flags,
&Byte(buf, Long_val(ofs)), Long_val(len));
return Val_long(l);
}
CAMLexport void caml_output_value_to_malloc(value v, value flags,
/*out*/ char ** buf,
/*out*/ intnat * len)
{
char header[32];
int header_len;
intnat data_len;
char * res;
struct output_block * blk;
init_extern_output();
data_len = extern_value(v, flags, header, &header_len);
res = malloc(header_len + data_len);
if (res == NULL) extern_out_of_memory();
*buf = res;
*len = header_len + data_len;
memcpy(res, header, header_len);
res += header_len;
for (blk = extern_output_first; blk != NULL; blk = blk->next) {
int n = blk->end - blk->data;
memcpy(res, blk->data, n);
res += n;
}
free_extern_output();
}
/* Functions for writing user-defined marshallers */
CAMLexport void caml_serialize_int_1(int i)
{
if (extern_ptr + 1 > extern_limit) grow_extern_output(1);
extern_ptr[0] = i;
extern_ptr += 1;
}
CAMLexport void caml_serialize_int_2(int i)
{
if (extern_ptr + 2 > extern_limit) grow_extern_output(2);
store16(extern_ptr, i);
extern_ptr += 2;
}
CAMLexport void caml_serialize_int_4(int32_t i)
{
if (extern_ptr + 4 > extern_limit) grow_extern_output(4);
store32(extern_ptr, i);
extern_ptr += 4;
}
CAMLexport void caml_serialize_int_8(int64_t i)
{
if (extern_ptr + 8 > extern_limit) grow_extern_output(8);
store64(extern_ptr, i);
extern_ptr += 8;
}
CAMLexport void caml_serialize_float_4(float f)
{
caml_serialize_block_4(&f, 1);
}
CAMLexport void caml_serialize_float_8(double f)
{
caml_serialize_block_float_8(&f, 1);
}
CAMLexport void caml_serialize_block_1(void * data, intnat len)
{
if (extern_ptr + len > extern_limit) grow_extern_output(len);
memcpy(extern_ptr, data, len);
extern_ptr += len;
}
CAMLexport void caml_serialize_block_2(void * data, intnat len)
{
if (extern_ptr + 2 * len > extern_limit) grow_extern_output(2 * len);
#ifndef ARCH_BIG_ENDIAN
{
unsigned char * p;
char * q;
for (p = data, q = extern_ptr; len > 0; len--, p += 2, q += 2)
Reverse_16(q, p);
extern_ptr = q;
}
#else
memcpy(extern_ptr, data, len * 2);
extern_ptr += len * 2;
#endif
}
CAMLexport void caml_serialize_block_4(void * data, intnat len)
{
if (extern_ptr + 4 * len > extern_limit) grow_extern_output(4 * len);
#ifndef ARCH_BIG_ENDIAN
{
unsigned char * p;
char * q;
for (p = data, q = extern_ptr; len > 0; len--, p += 4, q += 4)
Reverse_32(q, p);
extern_ptr = q;
}
#else
memcpy(extern_ptr, data, len * 4);
extern_ptr += len * 4;
#endif
}
CAMLexport void caml_serialize_block_8(void * data, intnat len)
{
if (extern_ptr + 8 * len > extern_limit) grow_extern_output(8 * len);
#ifndef ARCH_BIG_ENDIAN
{
unsigned char * p;
char * q;
for (p = data, q = extern_ptr; len > 0; len--, p += 8, q += 8)
Reverse_64(q, p);
extern_ptr = q;
}
#else
memcpy(extern_ptr, data, len * 8);
extern_ptr += len * 8;
#endif
}
CAMLexport void caml_serialize_block_float_8(void * data, intnat len)
{
if (extern_ptr + 8 * len > extern_limit) grow_extern_output(8 * len);
#if ARCH_FLOAT_ENDIANNESS == 0x01234567
memcpy(extern_ptr, data, len * 8);
extern_ptr += len * 8;
#elif ARCH_FLOAT_ENDIANNESS == 0x76543210
{
unsigned char * p;
char * q;
for (p = data, q = extern_ptr; len > 0; len--, p += 8, q += 8)
Reverse_64(q, p);
extern_ptr = q;
}
#else
{
unsigned char * p;
char * q;
for (p = data, q = extern_ptr; len > 0; len--, p += 8, q += 8)
Permute_64(q, 0x01234567, p, ARCH_FLOAT_ENDIANNESS);
extern_ptr = q;
}
#endif
}
/* Find where a code pointer comes from */
CAMLexport struct code_fragment * caml_extern_find_code(char *addr)
{
int i;
for (i = caml_code_fragments_table.size - 1; i >= 0; i--) {
struct code_fragment * cf = caml_code_fragments_table.contents[i];
if (! cf->digest_computed) {
caml_md5_block(cf->digest, cf->code_start, cf->code_end - cf->code_start);
cf->digest_computed = 1;
}
if (cf->code_start <= addr && addr < cf->code_end) return cf;
}
return NULL;
}
|