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Diffstat (limited to 'binutils-2.17/gas/input-file.c')
-rw-r--r-- | binutils-2.17/gas/input-file.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/binutils-2.17/gas/input-file.c b/binutils-2.17/gas/input-file.c deleted file mode 100644 index 343f0494..00000000 --- a/binutils-2.17/gas/input-file.c +++ /dev/null @@ -1,263 +0,0 @@ -/* input_file.c - Deal with Input Files - - Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001, - 2002, 2003, 2005 - 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, 51 Franklin Street - Fifth Floor, Boston, MA - 02110-1301, 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 <errno.h> -#include "as.h" -#include "input-file.h" -#include "safe-ctype.h" - -static int input_file_get (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 accommodate most operating systems. */ - -void -input_file_begin (void) -{ - f_in = (FILE *) 0; -} - -void -input_file_end (void) -{ -} - -/* Return BUFFER_SIZE. */ -unsigned int -input_file_buffer_size (void) -{ - return (BUFFER_SIZE); -} - -/* Push the state of our input, returning a pointer to saved info that - can be restored with input_file_pop (). */ - -char * -input_file_push (void) -{ - 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 (); - - /* Initialize for new file. */ - input_file_begin (); - - return (char *) saved; -} - -void -input_file_pop (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 (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]) - { - f_in = fopen (filename, FOPEN_RT); - file_name = filename; - } - else - { - /* Use stdin for the input file. */ - f_in = stdin; - /* For error messages. */ - file_name = _("{standard input}"); - } - - if (f_in == NULL) - { - bfd_set_error (bfd_error_system_call); - as_perror (_("Can't open %s for reading"), file_name); - return; - } - - c = getc (f_in); - - if (ferror (f_in)) - { - bfd_set_error (bfd_error_system_call); - as_perror (_("Can't open %s for reading"), file_name); - - fclose (f_in); - f_in = NULL; - return; - } - - if (c == '#') - { - /* Begins with comment, may not want to preprocess. */ - c = getc (f_in); - if (c == 'N') - { - fgets (buf, 80, f_in); - if (!strncmp (buf, "O_APP", 5) && ISSPACE (buf[5])) - preprocess = 0; - if (!strchr (buf, '\n')) - ungetc ('#', f_in); /* It was longer. */ - else - ungetc ('\n', f_in); - } - else if (c == 'A') - { - fgets (buf, 80, f_in); - if (!strncmp (buf, "PP", 2) && ISSPACE (buf[2])) - preprocess = 1; - if (!strchr (buf, '\n')) - ungetc ('#', f_in); - 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 (void) -{ - /* Don't close a null file pointer. */ - if (f_in != NULL) - fclose (f_in); - - f_in = 0; -} - -/* This function is passed to do_scrub_chars. */ - -static int -input_file_get (char *buf, int buflen) -{ - int size; - - size = fread (buf, sizeof (char), buflen, f_in); - if (size < 0) - { - bfd_set_error (bfd_error_system_call); - 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 (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) - { - bfd_set_error (bfd_error_system_call); - as_perror (_("Can't read from %s"), file_name); - size = 0; - } - if (size) - return_value = where + size; - else - { - if (fclose (f_in)) - { - bfd_set_error (bfd_error_system_call); - as_perror (_("Can't close %s"), file_name); - } - f_in = (FILE *) 0; - return_value = 0; - } - - return return_value; -} |