Page 238 - ARM 64 Bit Assembly Language
P. 238
226 Chapter 7
587 } else {
588 cmp = 1; // d > 0
589 }
590 bigint_free(d);
591 return cmp;
592 }
593
594 /******************************************************************/
595 /* Functions for binary input/output */
596 /******************************************************************/
597
598 void bigint_write_binary(FILE *f,bigint x) {
599 if (fwrite(&(x->size), sizeof(x->size), 1, f) != 1) {
600 perror("Write failed");
601 exit(4);
602 }
603 if (fwrite(x->blks, sizeof(chunk), x->size, f) != x->size) {
604 perror("Write failed");
605 exit(4);
606 }
607 }
608
609 bigint bigint_read_binary(FILE *f) {
610 bigint r = (bigint) malloc(sizeof(struct bigint_struct));
611 if (r == NULL) {
612 perror("bigint_read_binary");
613 exit(1);
614 }
615 if (fread(&(r->size), sizeof(r->size), 1, f) != 1) {
616 free(r);
617 return NULL;
618 }
619 r->blks = (chunk *) malloc(r->size * sizeof(chunk));
620 if (r->blks == NULL) {
621 perror("bigint_read_binary");
622 exit(2);
623 }
624 if (fread(r->blks, sizeof(chunk), r->size, f) != r->size) {
625 perror("Unable to read from file");
626 exit(4);
627 }
628 return r;
629 }
630
631 /******************************************************************/
632 /* Utility functions */
633 /******************************************************************/
634
635 bigint bigint_alloc(int chunks) {
