diff options
Diffstat (limited to 'gas/input-file.c')
| -rw-r--r-- | gas/input-file.c | 376 |
1 files changed, 188 insertions, 188 deletions
diff --git a/gas/input-file.c b/gas/input-file.c index cf1a4c3..7ed492e 100644 --- a/gas/input-file.c +++ b/gas/input-file.c @@ -1,23 +1,21 @@ /* input_file.c - Deal with Input Files - Copyright (C) 1987, 1990, 1991 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 1, 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. */ - -/* static const char rcsid[] = "$Id$"; */ + + 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * Confines all details of reading source bytes to this module. @@ -39,7 +37,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* 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; /* @@ -62,150 +60,150 @@ 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; + 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; + f_in = (FILE *)0; } void input_file_end () { } - /* Return BUFFER_SIZE. */ +/* Return BUFFER_SIZE. */ int input_file_buffer_size() { - return (BUFFER_SIZE); + return (BUFFER_SIZE); } int input_file_is_open() { - return f_in!=(FILE *)0; + 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; + 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; + 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); + 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); } #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_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. */ { - 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); + 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; } - (void)dup2 (fd, fileno(stdout)); -/* JF for testing #define PREPROCESSOR "/lib/app" */ + 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); - } + 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); + } } #else void -input_file_open (filename,pre) - char * filename; /* "" means use stdin. Must not be 0. */ - int pre; + 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"); @@ -218,44 +216,44 @@ input_file_open (filename,pre) as_perror ("Can't open %s for reading", file_name); return; } - + #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; + preprocess=0; if (!strchr(buf,'\n')) - ungetc('#',f_in); /* It was longer */ + ungetc('#',f_in); /* It was longer */ else - ungetc('\n',f_in); + ungetc('\n',f_in); } else if(c=='\n') - ungetc('\n',f_in); + ungetc('\n',f_in); else - ungetc('#',f_in); + ungetc('#',f_in); } else - ungetc(c,f_in); - + 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. */ + 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 */ @@ -268,55 +266,57 @@ input_file_open (filename,pre) /* Close input file. */ void input_file_close() { - fclose (f_in); - f_in = 0; -} + 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. */ + 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) { - 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); + 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); } |