It raises the need for puzzle solving skills as part

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Unformatted text preview: turn(-1); } else if (rptr->rl_cnt == 0) return(0); rptr->rl_bufptr = rptr->rl_buf; } rptr->rl_cnt--; *ptr = *rptr->rl_bufptr++ & 255; return(1); } ssize_t readline_r(Rline *rptr) { int n, rc; char c, *ptr = rptr->read_ptr; for (n = 1; n < rptr->read_maxlen; n++) { if ( (rc = my_read_r(rptr, &c)) == 1) { *ptr++ = c; if (c == ’\n’) break; } else if (rc == 0) { if (n == 1) return(0); /* EOF, no data read */ else break; /* EOF, some data was read */ } else return(-1); /* error */ } *ptr = 0; return(n); } A.5. THE CSAPP.C SOURCE FILE 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 689 /* * readline_rinit - initialization function for readline_r */ void readline_rinit(int fd, void *ptr, size_t maxlen, Rline *rptr) { rptr->read_fd = fd; /* save caller’s arguments */ rptr->read_ptr = ptr; rptr->read_maxlen = maxlen; rptr->rl_cnt = 0; /* and init our counter &...
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This note was uploaded on 09/02/2010 for the course ELECTRICAL 360 taught by Professor Schultz during the Spring '10 term at BYU.

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