diff options
Diffstat (limited to 'gas/input-file.c')
| -rw-r--r-- | gas/input-file.c | 77 |
1 files changed, 37 insertions, 40 deletions
diff --git a/gas/input-file.c b/gas/input-file.c index f001e52..02512de 100644 --- a/gas/input-file.c +++ b/gas/input-file.c @@ -1,5 +1,5 @@ /* input_file.c - Deal with Input Files - - Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000 + Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. @@ -19,12 +19,10 @@ 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! - */ +/* 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> @@ -35,34 +33,30 @@ 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. - */ + 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. - */ +/* 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. - */ +/* 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; -}; +struct saved_file + { + FILE * f_in; + char * file_name; + int preprocess; + char * app_save; + }; /* These hooks accomodate most operating systems. */ @@ -92,6 +86,7 @@ input_file_is_open () /* Push the state of our input, returning a pointer to saved info that can be restored with input_file_pop (). */ + char * input_file_push () { @@ -105,7 +100,8 @@ input_file_push () if (preprocess) saved->app_save = app_push (); - input_file_begin (); /* Initialize for new file */ + /* Initialize for new file. */ + input_file_begin (); return (char *) saved; } @@ -116,7 +112,7 @@ input_file_pop (arg) { register struct saved_file *saved = (struct saved_file *) arg; - input_file_end (); /* Close out old file */ + input_file_end (); /* Close out old file. */ f_in = saved->f_in; file_name = saved->file_name; @@ -140,7 +136,7 @@ input_file_open (filename, 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"); + f_in = fopen (filename, FOPEN_RT); file_name = filename; } else @@ -157,7 +153,8 @@ input_file_open (filename, pre) c = getc (f_in); if (c == '#') - { /* Begins with comment, may not want to preprocess */ + { + /* Begins with comment, may not want to preprocess. */ c = getc (f_in); if (c == 'N') { @@ -165,7 +162,7 @@ input_file_open (filename, pre) if (!strcmp (buf, "O_APP\n")) preprocess = 0; if (!strchr (buf, '\n')) - ungetc ('#', f_in); /* It was longer */ + ungetc ('#', f_in); /* It was longer. */ else ungetc ('\n', f_in); } @@ -179,13 +176,14 @@ input_file_open (filename, pre) } /* Close input file. */ + void input_file_close () { + /* Don't close a null file pointer. */ if (f_in != NULL) - { - fclose (f_in); - } /* don't close a null file pointer */ + fclose (f_in); + f_in = 0; } @@ -218,12 +216,10 @@ input_file_give_next_buffer (where) 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. - */ + /* 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 @@ -242,5 +238,6 @@ input_file_give_next_buffer (where) f_in = (FILE *) 0; return_value = 0; } - return (return_value); + + return return_value; } |