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Diffstat (limited to 'gas/input-file.c')
| -rw-r--r-- | gas/input-file.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/gas/input-file.c b/gas/input-file.c deleted file mode 100644 index 634f6f73930..00000000000 --- a/gas/input-file.c +++ /dev/null @@ -1,249 +0,0 @@ -/* input_file.c - Deal with Input Files - - Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 98, 1999 - 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. */ - -/* - * Confines all details of reading source bytes to this module. - * All O/S specific crocks should live here. - * What we lose in "efficiency" we gain in modularity. - * Note we don't need to #include the "as.h" file. No common coupling! - */ - -#include <stdio.h> -#include <string.h> - -#include "as.h" -#include "input-file.h" - -static int input_file_get PARAMS ((char *, int)); - -/* This variable is non-zero if the file currently being read should be - preprocessed by app. It is zero if the file can be read straight in. - */ -int preprocess = 0; - -/* - * This code opens a file, then delivers BUFFER_SIZE character - * chunks of the file on demand. - * BUFFER_SIZE is supposed to be a number chosen for speed. - * The caller only asks once what BUFFER_SIZE is, and asks before - * the nature of the input files (if any) is known. - */ - -#define BUFFER_SIZE (32 * 1024) - -/* - * We use static data: the data area is not sharable. - */ - -static FILE *f_in; -static char *file_name; - -/* Struct for saving the state of this module for file includes. */ -struct saved_file - { - FILE *f_in; - char *file_name; - int preprocess; - char *app_save; - }; - -/* These hooks accomodate most operating systems. */ - -void -input_file_begin () -{ - f_in = (FILE *) 0; -} - -void -input_file_end () -{ -} - -/* Return BUFFER_SIZE. */ -unsigned int -input_file_buffer_size () -{ - return (BUFFER_SIZE); -} - -int -input_file_is_open () -{ - return f_in != (FILE *) 0; -} - -/* Push the state of our input, returning a pointer to saved info that - can be restored with input_file_pop (). */ -char * -input_file_push () -{ - register struct saved_file *saved; - - saved = (struct saved_file *) xmalloc (sizeof *saved); - - saved->f_in = f_in; - saved->file_name = file_name; - saved->preprocess = preprocess; - if (preprocess) - saved->app_save = app_push (); - - input_file_begin (); /* Initialize for new file */ - - return (char *) saved; -} - -void -input_file_pop (arg) - char *arg; -{ - register struct saved_file *saved = (struct saved_file *) arg; - - input_file_end (); /* Close out old file */ - - f_in = saved->f_in; - file_name = saved->file_name; - preprocess = saved->preprocess; - if (preprocess) - app_pop (saved->app_save); - - free (arg); -} - -void -input_file_open (filename, pre) - char *filename; /* "" means use stdin. Must not be 0. */ - int pre; -{ - int c; - char buf[80]; - - preprocess = pre; - - assert (filename != 0); /* Filename may not be NULL. */ - if (filename[0]) - { /* We have a file name. Suck it and see. */ - f_in = fopen (filename, "r"); - file_name = filename; - } - else - { /* use stdin for the input file. */ - f_in = stdin; - file_name = _("{standard input}"); /* For error messages. */ - } - if (f_in == (FILE *) 0) - { - as_bad (_("Can't open %s for reading."), file_name); - as_perror ("%s", file_name); - return; - } - - c = getc (f_in); - if (c == '#') - { /* Begins with comment, may not want to preprocess */ - c = getc (f_in); - if (c == 'N') - { - fgets (buf, 80, f_in); - if (!strcmp (buf, "O_APP\n")) - preprocess = 0; - if (!strchr (buf, '\n')) - ungetc ('#', f_in); /* It was longer */ - else - ungetc ('\n', f_in); - } - else if (c == '\n') - ungetc ('\n', f_in); - else - ungetc ('#', f_in); - } - else - ungetc (c, f_in); -} - -/* Close input file. */ -void -input_file_close () -{ - if (f_in != NULL) - { - fclose (f_in); - } /* don't close a null file pointer */ - f_in = 0; -} /* input_file_close() */ - -/* This function is passed to do_scrub_chars. */ - -static int -input_file_get (buf, buflen) - char *buf; - int buflen; -{ - int size; - - size = fread (buf, sizeof (char), buflen, f_in); - if (size < 0) - { - as_perror (_("Can't read from %s"), file_name); - size = 0; - } - return size; -} - -/* Read a buffer from the input file. */ - -char * -input_file_give_next_buffer (where) - char *where; /* Where to place 1st character of new buffer. */ -{ - char *return_value; /* -> Last char of what we read, + 1. */ - register int size; - - if (f_in == (FILE *) 0) - return 0; - /* - * fflush (stdin); could be done here if you want to synchronise - * stdin and stdout, for the case where our input file is stdin. - * Since the assembler shouldn't do any output to stdout, we - * don't bother to synch output and input. - */ - if (preprocess) - size = do_scrub_chars (input_file_get, where, BUFFER_SIZE); - else - size = fread (where, sizeof (char), BUFFER_SIZE, f_in); - if (size < 0) - { - as_perror (_("Can't read from %s"), file_name); - size = 0; - } - if (size) - return_value = where + size; - else - { - if (fclose (f_in)) - as_perror (_("Can't close %s"), file_name); - f_in = (FILE *) 0; - return_value = 0; - } - return (return_value); -} - -/* end of input-file.c */ |