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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
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19990502 sourceware importbinu_ss_19990502
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+/* input_file.h header for input-file.c
+ Copyright (C) 1987, 1992 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 2, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 (using as_perror) so caller doesn't have to think
+ * about I/O errors. No I/O errors are fatal: an end-of-file may be faked.
+ */
+
+char *input_file_give_next_buffer PARAMS ((char *where));
+char *input_file_push PARAMS ((void));
+unsigned int input_file_buffer_size PARAMS ((void));
+int input_file_is_open PARAMS ((void));
+void input_file_begin PARAMS ((void));
+void input_file_close PARAMS ((void));
+void input_file_end PARAMS ((void));
+void input_file_open PARAMS ((char *filename, int pre));
+void input_file_pop PARAMS ((char *arg));
+
+/* end of input_file.h */