| | 1 | /* Copyright (c) 1979 Regents of the University of California */ |
| | 2 | |
| | 3 | static char sccsid[] = "@(#)IOSYNC.c 1.5 %G%"; |
| | 4 | |
| | 5 | #include "h00vars.h" |
| | 6 | |
| | 7 | /* |
| | 8 | * insure that a usable image is in the buffer window |
| | 9 | */ |
| | 10 | IOSYNC(curfile) |
| | 11 | |
| | 12 | register struct iorec *curfile; |
| | 13 | { |
| | 14 | char *limit, *ptr; |
| | 15 | |
| | 16 | if (curfile->funit & FWRITE) { |
| | 17 | ERROR("%s: Attempt to read, but open for writing\n", |
| | 18 | curfile->pfname); |
| | 19 | return; |
| | 20 | } |
| | 21 | if ((curfile->funit & SYNC) == 0) { |
| | 22 | return; |
| | 23 | } |
| | 24 | if (curfile->funit & EOFF) { |
| | 25 | ERROR("%s: Tried to read past end of file\n", curfile->pfname); |
| | 26 | return; |
| | 27 | } |
| | 28 | curfile->funit &= ~SYNC; |
| | 29 | if (curfile->funit & SPEOLN) { |
| | 30 | curfile->funit &= ~(SPEOLN|EOLN); |
| | 31 | curfile->funit |= EOFF; |
| | 32 | return; |
| | 33 | } |
| | 34 | fread(curfile->fileptr, (int)curfile->fsize, 1, curfile->fbuf); |
| | 35 | if (ferror(curfile->fbuf)) { |
| | 36 | ERROR("%s: Tried to read past end of file\n", curfile->pfname); |
| | 37 | return; |
| | 38 | } |
| | 39 | if (feof(curfile->fbuf)) { |
| | 40 | if (curfile->funit & FTEXT) { |
| | 41 | *curfile->fileptr = ' '; |
| | 42 | if (curfile->funit & EOLN) { |
| | 43 | curfile->funit &= ~EOLN; |
| | 44 | curfile->funit |= EOFF; |
| | 45 | return; |
| | 46 | } |
| | 47 | curfile->funit |= (SPEOLN|EOLN); |
| | 48 | return; |
| | 49 | } |
| | 50 | curfile->funit |= EOFF; |
| | 51 | limit = &curfile->fileptr[curfile->fsize]; |
| | 52 | for (ptr = curfile->fileptr; ptr < limit; ) |
| | 53 | *ptr++ = 0; |
| | 54 | return; |
| | 55 | } |
| | 56 | if (curfile->funit & FTEXT) { |
| | 57 | if (*curfile->fileptr == '\n') { |
| | 58 | curfile->funit |= EOLN; |
| | 59 | *curfile->fileptr = ' '; |
| | 60 | return; |
| | 61 | } |
| | 62 | curfile->funit &= ~EOLN; |
| | 63 | } |
| | 64 | } |
projects / unix-history / blame_incremental