| 1 | /* input_file.h header for input-file.c |
| 2 | Copyright (C) 1987, 1992 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | /*"input_file.c":Operating-system dependant functions to read source files.*/ |
| 21 | |
| 22 | |
| 23 | /* |
| 24 | * No matter what the operating system, this module must provide the |
| 25 | * following services to its callers. |
| 26 | * |
| 27 | * input_file_begin() Call once before anything else. |
| 28 | * |
| 29 | * input_file_end() Call once after everything else. |
| 30 | * |
| 31 | * input_file_buffer_size() Call anytime. Returns largest possible |
| 32 | * delivery from |
| 33 | * input_file_give_next_buffer(). |
| 34 | * |
| 35 | * input_file_open(name) Call once for each input file. |
| 36 | * |
| 37 | * input_file_give_next_buffer(where) Call once to get each new buffer. |
| 38 | * Return 0: no more chars left in file, |
| 39 | * the file has already been closed. |
| 40 | * Otherwise: return a pointer to just |
| 41 | * after the last character we read |
| 42 | * into the buffer. |
| 43 | * If we can only read 0 characters, then |
| 44 | * end-of-file is faked. |
| 45 | * |
| 46 | * input_file_push() Push state, which can be restored |
| 47 | * later. Does implicit input_file_begin. |
| 48 | * Returns char * to saved state. |
| 49 | * |
| 50 | * input_file_pop (arg) Pops previously saved state. |
| 51 | * |
| 52 | * input_file_close () Closes opened file. |
| 53 | * |
| 54 | * All errors are reported (using as_perror) so caller doesn't have to think |
| 55 | * about I/O errors. No I/O errors are fatal: an end-of-file may be faked. |
| 56 | */ |
| 57 | |
| 58 | char *input_file_give_next_buffer PARAMS ((char *where)); |
| 59 | char *input_file_push PARAMS ((void)); |
| 60 | unsigned int input_file_buffer_size PARAMS ((void)); |
| 61 | int input_file_is_open PARAMS ((void)); |
| 62 | void input_file_begin PARAMS ((void)); |
| 63 | void input_file_close PARAMS ((void)); |
| 64 | void input_file_end PARAMS ((void)); |
| 65 | void input_file_open PARAMS ((char *filename, int pre)); |
| 66 | void input_file_pop PARAMS ((char *arg)); |
| 67 | |
| 68 | /* end of input_file.h */ |