1998-03-01 22:58:51 +00:00
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/* input_file.h header for input-file.c
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Copyright (C) 1987, 1992 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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2001-05-28 05:21:37 +00:00
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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1998-03-01 22:58:51 +00:00
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/*"input_file.c":Operating-system dependant functions to read source files.*/
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/*
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* No matter what the operating system, this module must provide the
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* following services to its callers.
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*
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* input_file_begin() Call once before anything else.
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*
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* input_file_end() Call once after everything else.
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*
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* input_file_buffer_size() Call anytime. Returns largest possible
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* delivery from
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* input_file_give_next_buffer().
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*
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* input_file_open(name) Call once for each input file.
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*
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* input_file_give_next_buffer(where) Call once to get each new buffer.
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* Return 0: no more chars left in file,
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* the file has already been closed.
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* Otherwise: return a pointer to just
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* after the last character we read
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* into the buffer.
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* If we can only read 0 characters, then
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* end-of-file is faked.
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*
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* input_file_push() Push state, which can be restored
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* later. Does implicit input_file_begin.
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* Returns char * to saved state.
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*
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* input_file_pop (arg) Pops previously saved state.
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*
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* input_file_close () Closes opened file.
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*
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* All errors are reported (using as_perror) so caller doesn't have to think
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* about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
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*/
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char *input_file_give_next_buffer PARAMS ((char *where));
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char *input_file_push PARAMS ((void));
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unsigned int input_file_buffer_size PARAMS ((void));
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int input_file_is_open PARAMS ((void));
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void input_file_begin PARAMS ((void));
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void input_file_close PARAMS ((void));
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void input_file_end PARAMS ((void));
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void input_file_open PARAMS ((char *filename, int pre));
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void input_file_pop PARAMS ((char *arg));
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