/* input_file.c - Deal with Input Files -
- Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
-
+ Copyright (C) 1987-2019 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)
+ 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, 675 Mass Ave, Cambridge, MA 02139, 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!
- */
-
-#ifdef USG
-#define setbuffer(stream, buf, size) setvbuf((stream), (buf), _IOFBF, (size))
-#endif
+ 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. */
-#include <stdio.h>
-#include <assert.h>
-#include <string.h>
+/* 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 "as.h"
#include "input-file.h"
+#include "safe-ctype.h"
/* 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. */
-FILE *f_in;
-/* static JF remove static so app.c can use file_name */
-char * file_name;
+static FILE *f_in;
+static const 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;
+ const char * file_name;
+ int preprocess;
+ char * app_save;
+ };
\f
-/* These hooks accomodate most operating systems. */
+/* These hooks accommodate most operating systems. */
-void input_file_begin() {
- f_in = (FILE *)0;
+void
+input_file_begin (void)
+{
+ f_in = (FILE *) 0;
}
-void input_file_end () { }
-
-/* Return BUFFER_SIZE. */
-int input_file_buffer_size() {
- return (BUFFER_SIZE);
+void
+input_file_end (void)
+{
}
-int input_file_is_open() {
- return f_in!=(FILE *)0;
+/* Return BUFFER_SIZE. */
+size_t
+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 () {
- 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;
+char *
+input_file_push (void)
{
- 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);
+ struct saved_file *saved;
+
+ saved = XNEW (struct saved_file);
+
+ 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;
}
-\f
-#ifdef DONTDEF /* JF save old version in case we need it */
+
void
- input_file_open (filename, preprocess, debugging)
-char * filename; /* "" means use stdin. Must not be 0. */
-int preprocess; /* TRUE if needs app. */
-int debugging; /* TRUE if we are debugging assembler. */
+input_file_pop (char *arg)
{
- assert( filename != 0 ); /* Filename may not be NULL. */
- if (filename [0])
- { /* We have a file name. Suck it and see. */
- file_handle = open (filename, O_RDONLY, 0);
- file_name = filename;
- }
- else
- { /* use stdin for the input file. */
- file_handle = fileno (stdin);
- file_name = "{standard input}"; /* For error messages. */
- }
- if (file_handle < 0)
- as_perror ("Can't open %s for reading", file_name);
- if ( preprocess )
- {
- /*
- * This code was written in haste for a frobbed BSD 4.2.
- * I have a flight to catch: will someone please do proper
- * error checks? - Dean.
- */
- int pid;
- char temporary_file_name [12];
- int fd;
- union wait status;
-
- (void)strcpy (temporary_file_name, "#appXXXXXX");
- (void)mktemp (temporary_file_name);
- pid = vfork ();
- if (pid == -1)
- {
- as_perror ("Vfork failed", file_name);
- _exit (144);
- }
- if (pid == 0)
- {
- (void)dup2 (file_handle, fileno(stdin));
- fd = open (temporary_file_name, O_WRONLY + O_TRUNC + O_CREAT, 0666);
- if (fd == -1)
- {
- (void)write(2,"Can't open temporary\n",21);
- _exit (99);
- }
- (void)dup2 (fd, fileno(stdout));
- /* JF for testing #define PREPROCESSOR "/lib/app" */
-#define PREPROCESSOR "./app"
- execl (PREPROCESSOR, PREPROCESSOR, 0);
- execl ("app","app",0);
- (void)write(2,"Exec of app failed. Get help.\n",31);
- (void)unlink(temporary_file_name);
- _exit (11);
- }
- (void)wait (& status);
- if (status.w_status & 0xFF00) /* JF was 0xF000, was wrong */
- {
- file_handle = -1;
- as_bad( "Can't preprocess file \"%s\", status = %xx", file_name, status.w_status );
- }
- else
- {
- file_handle = open (temporary_file_name, O_RDONLY, 0);
- if ( ! debugging && unlink(temporary_file_name))
- as_perror ("Can't delete temp file %s", temporary_file_name);
- }
- if (file_handle == -1)
- as_perror ("Can't retrieve temp file %s", temporary_file_name);
- }
+ 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);
}
-#else
+\f
+/* Open the specified file, "" means stdin. Filename must not be null. */
void
- input_file_open (filename,pre)
-char * filename; /* "" means use stdin. Must not be 0. */
-int pre;
+input_file_open (const char *filename,
+ 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_perror ("Can't open %s for reading", file_name);
- return;
+ int c;
+ char buf[80];
+
+ preprocess = pre;
+
+ gas_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)
+ {
+ as_bad (_("can't open %s for reading: %s"),
+ file_name, xstrerror (errno));
+ return;
+ }
+
+ c = getc (f_in);
+
+ if (ferror (f_in))
+ {
+ as_bad (_("can't read from %s: %s"),
+ file_name, xstrerror (errno));
+
+ fclose (f_in);
+ f_in = NULL;
+ return;
+ }
+
+ /* Check for an empty input file. */
+ if (feof (f_in))
+ {
+ fclose (f_in);
+ f_in = NULL;
+ return;
+ }
+ gas_assert (c != EOF);
+
+ if (c == '#')
+ {
+ /* Begins with comment, may not want to preprocess. */
+ c = getc (f_in);
+ if (c == 'N')
+ {
+ if (fgets (buf, sizeof (buf), f_in)
+ && !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);
}
-
-#ifndef VMS
- /* Ask stdio to buffer our input at BUFFER_SIZE, with a dynamically
- allocated buffer. */
- setvbuf(f_in, (char *)NULL, _IOFBF, BUFFER_SIZE);
-#endif /* VMS */
-
- 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);
-
-#ifdef DONTDEF
- if ( preprocess ) {
- char temporary_file_name [17];
- FILE *f_out;
-
- (void)strcpy (temporary_file_name, "/tmp/#appXXXXXX");
- (void)mktemp (temporary_file_name);
- f_out=fopen(temporary_file_name,"w+");
- if(f_out==(FILE *)0)
- as_perror("Can't open temp file %s",temporary_file_name);
-
- /* JF this will have to be moved on any system that
- does not support removal of open files. */
- (void)unlink(temporary_file_name);/* JF do it NOW */
- do_scrub(f_in,f_out);
- (void)fclose(f_in); /* All done with it */
- (void)rewind(f_out);
- f_in=f_out;
+ else if (c == 'A')
+ {
+ if (fgets (buf, sizeof (buf), f_in)
+ && !strncmp (buf, "PP", 2) && ISSPACE (buf[2]))
+ preprocess = 1;
+ if (!strchr (buf, '\n'))
+ ungetc ('#', f_in);
+ else
+ ungetc ('\n', f_in);
}
-#endif
+ else if (c == '\n')
+ ungetc ('\n', f_in);
+ else
+ ungetc ('#', f_in);
+ }
+ else
+ ungetc (c, f_in);
}
-#endif
/* 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() */
-char *
- input_file_give_next_buffer (where)
-char * where; /* Where to place 1st character of new buffer. */
+void
+input_file_close (void)
{
- 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) {
- char *p;
- int n;
- int ch;
- extern FILE *scrub_file;
-
- scrub_file=f_in;
- for (p = where, n = BUFFER_SIZE; n; --n) {
-
- ch = do_scrub_next_char(scrub_from_file, scrub_to_file);
- if (ch == EOF)
- break;
- *p++=ch;
- }
- size=BUFFER_SIZE-n;
- } 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);
+ /* Don't close a null file pointer. */
+ if (f_in != NULL)
+ fclose (f_in);
+
+ f_in = 0;
}
-/* end of input-file.c */
+/* This function is passed to do_scrub_chars. */
+
+static size_t
+input_file_get (char *buf, size_t buflen)
+{
+ size_t size;
+
+ if (feof (f_in))
+ return 0;
+
+ size = fread (buf, sizeof (char), buflen, f_in);
+ if (ferror (f_in))
+ as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
+ 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. */
+ size_t 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 = input_file_get (where, BUFFER_SIZE);
+
+ if (size)
+ return_value = where + size;
+ else
+ {
+ if (fclose (f_in))
+ as_warn (_("can't close %s: %s"), file_name, xstrerror (errno));
+
+ f_in = (FILE *) 0;
+ return_value = 0;
+ }
+
+ return return_value;
+}
projects / deliverable / binutils-gdb.git / blobdiff