diff options
Diffstat (limited to 'gnu/usr.bin/bc/main.c')
| -rw-r--r-- | gnu/usr.bin/bc/main.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/gnu/usr.bin/bc/main.c b/gnu/usr.bin/bc/main.c deleted file mode 100644 index 57bcd8c..0000000 --- a/gnu/usr.bin/bc/main.c +++ /dev/null @@ -1,204 +0,0 @@ -/* main.c: The main program for bc. */ - -/* This file is part of bc written for MINIX. - Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. - - This program 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 of the License , or - (at your option) any later version. - - This program 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 this program; see the file COPYING. If not, write to - the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - - You may contact the author by: - e-mail: phil@cs.wwu.edu - us-mail: Philip A. Nelson - Computer Science Department, 9062 - Western Washington University - Bellingham, WA 98226-9062 - -*************************************************************************/ - -#include "bcdefs.h" -#include <signal.h> -#include "global.h" -#include "proto.h" - -/* Variables for processing multiple files. */ -char first_file; -extern FILE *yyin; - - -/* The main program for bc. */ -int -main (argc, argv) - int argc; - char *argv[]; -{ - int ch; - - /* Initialize many variables. */ - compile_only = FALSE; - use_math = FALSE; - warn_not_std = FALSE; - std_only = FALSE; - if (isatty(0) && isatty(1)) - interactive = TRUE; - else - interactive = FALSE; - - /* Parse the command line */ - ch = getopt (argc, argv, "lcisvw"); - while (ch != EOF) - { - switch (ch) - { - case 'c': /* compile only */ - compile_only = TRUE; - break; - case 'l': /* math lib */ - use_math = TRUE; - break; - case 'i': /* force interactive */ - interactive = TRUE; - break; - case 'w': /* Non standard features give warnings. */ - warn_not_std = TRUE; - break; - case 's': /* Non standard features give errors. */ - std_only = TRUE; - break; - case 'v': /* Print the version. */ - printf ("%s\n", BC_VERSION); - break; - } - ch = getopt (argc, argv, "lcisvw"); - } - - /* Initialize the machine. */ - init_storage(); - init_load(); - - /* Set up interrupts to print a message. */ - if (interactive) - signal (SIGINT, use_quit); - - /* Initialize the front end. */ - init_tree(); - init_gen (); - g_argv = argv; - g_argc = argc; - is_std_in = FALSE; - first_file = TRUE; - if (!open_new_file ()) - exit (1); - - /* Do the parse. */ - yyparse (); - - /* End the compile only output with a newline. */ - if (compile_only) - printf ("\n"); - - exit (0); -} - - -/* This is the function that opens all the files. - It returns TRUE if the file was opened, otherwise - it returns FALSE. */ - -int -open_new_file () -{ - FILE *new_file; - - /* Set the line number. */ - line_no = 1; - - /* Check to see if we are done. */ - if (is_std_in) return (FALSE); - - /* Open the other files. */ - if (use_math && first_file) - { -#ifdef BC_MATH_FILE - /* Make the first file be the math library. */ - new_file = fopen (BC_MATH_FILE, "r"); - use_math = FALSE; - if (new_file != NULL) - { - new_yy_file (new_file); - return TRUE; - } - else - { - fprintf (stderr, "Math Library unavailable.\n"); - exit (1); - } -#else - /* Load the code from a precompiled version of the math libarary. */ - extern char libmath[]; - char tmp; - /* These MUST be in the order of first mention of each function. - That is why "a" comes before "c" even though "a" is defined after - after "c". "a" is used in "s"! */ - tmp = lookup ("e", FUNCT); - tmp = lookup ("l", FUNCT); - tmp = lookup ("s", FUNCT); - tmp = lookup ("a", FUNCT); - tmp = lookup ("c", FUNCT); - tmp = lookup ("j", FUNCT); - load_code (libmath); -#endif - } - - /* One of the argv values. */ - while (optind < g_argc) - { - new_file = fopen (g_argv[optind], "r"); - if (new_file != NULL) - { - new_yy_file (new_file); - optind++; - return TRUE; - } - fprintf (stderr, "File %s is unavailable.\n", g_argv[optind++]); - exit (1); - } - - /* If we fall through to here, we should return stdin. */ - new_yy_file (stdin); - is_std_in = TRUE; - return TRUE; -} - - -/* Set yyin to the new file. */ - -void -new_yy_file (file) - FILE *file; -{ - if (!first_file) fclose (yyin); - yyin = file; - first_file = FALSE; -} - - -/* Message to use quit. */ - -void -use_quit (sig) - int sig; -{ - printf ("\n(interrupt) use quit to exit.\n"); - signal (SIGINT, use_quit); -} |
