| 0,0 → 1,49 |
|---|
| /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <libc/file.h> |
| #include <libc/local.h> |
| #include <libc/stdiohk.h> |
| |
| FILE *__alloc_file(void) |
| { |
| __file_rec *fr = __file_rec_list; |
| __file_rec **last_fr = &__file_rec_list; |
| FILE *rv=0; |
| int i; |
| |
| /* Try to find an empty slot */ |
| while (fr) |
| { |
| last_fr = &(fr->next); |
| |
| /* If one of the existing slots is available, return it */ |
| for (i=0; i<fr->count; i++) |
| if (fr->files[i]->_flag == 0) |
| return fr->files[i]; |
| |
| /* If this one is full, go to the next */ |
| if (fr->count == __FILE_REC_MAX) |
| fr = fr->next; |
| else |
| /* it isn't full, we can add to it */ |
| break; |
| } |
| if (!fr) |
| { |
| /* add another one to the end, make it empty */ |
| fr = *last_fr = (__file_rec *)malloc(sizeof(__file_rec)); |
| if (fr == 0) |
| return 0; |
| fr->next = 0; |
| fr->count = 0; |
| } |
| /* fr is a pointer to a rec with empty slots in it */ |
| rv = fr->files[fr->count] = (FILE *)malloc(sizeof(FILE)); |
| if (rv == 0) |
| return 0; |
| memset(rv, 0, sizeof(FILE)); |
| fr->count ++; |
| return rv; |
| } |