r6916@monacintosh2: monaka | 2008-11-24 19:18:29 +0900

[pf3gnuchains/pf3gnuchains4x.git] / gas / input-file.h

diff --git a/gas/input-file.h b/gas/input-file.h
new file mode 100644 (file)
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+++ b/gas/input-file.h
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+/* input_file.h header for input-file.c
+   Copyright 1987, 1992, 1993, 2000, 2003, 2005, 2006, 2007
+   Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GAS is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+/*"input_file.c":Operating-system dependant functions to read source files.*/
+
+/*
+ * No matter what the operating system, this module must provide the
+ * following services to its callers.
+ *
+ * input_file_begin()                  Call once before anything else.
+ *
+ * input_file_end()                    Call once after everything else.
+ *
+ * input_file_buffer_size()            Call anytime. Returns largest possible
+ *                                     delivery from
+ *                                     input_file_give_next_buffer().
+ *
+ * input_file_open(name)               Call once for each input file.
+ *
+ * input_file_give_next_buffer(where)  Call once to get each new buffer.
+ *                                     Return 0: no more chars left in file,
+ *                                        the file has already been closed.
+ *                                     Otherwise: return a pointer to just
+ *                                        after the last character we read
+ *                                        into the buffer.
+ *                                     If we can only read 0 characters, then
+ *                                     end-of-file is faked.
+ *
+ * input_file_push()                   Push state, which can be restored
+ *                                     later.  Does implicit input_file_begin.
+ *                                     Returns char * to saved state.
+ *
+ * input_file_pop (arg)                        Pops previously saved state.
+ *
+ * input_file_close ()                 Closes opened file.
+ *
+ * All errors are reported so caller doesn't have to think
+ * about I/O errors.
+ */
+
+char *input_file_give_next_buffer (char *where);
+char *input_file_push (void);
+unsigned int input_file_buffer_size (void);
+void input_file_begin (void);
+void input_file_close (void);
+void input_file_end (void);
+void input_file_open (char *filename, int pre);
+void input_file_pop (char *arg);