| 1 | /* input_file.h header for input-file.c
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| 2 | Copyright 1987, 1992, 1993, 2000 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of GAS, the GNU Assembler.
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| 5 |
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| 6 | GAS is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2, or (at your option)
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| 9 | any later version.
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| 10 |
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| 11 | GAS is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with GAS; see the file COPYING. If not, write to the Free
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| 18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 19 | 02111-1307, USA. */
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| 20 |
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| 21 | /*"input_file.c":Operating-system dependant functions to read source files.*/
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| 22 |
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| 23 | /*
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| 24 | * No matter what the operating system, this module must provide the
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| 25 | * following services to its callers.
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| 26 | *
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| 27 | * input_file_begin() Call once before anything else.
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| 28 | *
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| 29 | * input_file_end() Call once after everything else.
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| 30 | *
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| 31 | * input_file_buffer_size() Call anytime. Returns largest possible
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| 32 | * delivery from
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| 33 | * input_file_give_next_buffer().
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| 34 | *
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| 35 | * input_file_open(name) Call once for each input file.
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| 36 | *
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| 37 | * input_file_give_next_buffer(where) Call once to get each new buffer.
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| 38 | * Return 0: no more chars left in file,
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| 39 | * the file has already been closed.
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| 40 | * Otherwise: return a pointer to just
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| 41 | * after the last character we read
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| 42 | * into the buffer.
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| 43 | * If we can only read 0 characters, then
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| 44 | * end-of-file is faked.
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| 45 | *
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| 46 | * input_file_push() Push state, which can be restored
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| 47 | * later. Does implicit input_file_begin.
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| 48 | * Returns char * to saved state.
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| 49 | *
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| 50 | * input_file_pop (arg) Pops previously saved state.
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| 51 | *
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| 52 | * input_file_close () Closes opened file.
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| 53 | *
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| 54 | * All errors are reported (using as_perror) so caller doesn't have to think
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| 55 | * about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
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| 56 | */
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| 57 |
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| 58 | char *input_file_give_next_buffer PARAMS ((char *where));
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| 59 | char *input_file_push PARAMS ((void));
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| 60 | unsigned int input_file_buffer_size PARAMS ((void));
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| 61 | int input_file_is_open PARAMS ((void));
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| 62 | void input_file_begin PARAMS ((void));
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| 63 | void input_file_close PARAMS ((void));
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| 64 | void input_file_end PARAMS ((void));
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| 65 | void input_file_open PARAMS ((char *filename, int pre));
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| 66 | void input_file_pop PARAMS ((char *arg));
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