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- /* GNUPLOT - plot.c */
- /*
- * Copyright (C) 1986, 1987, 1990, 1991 Thomas Williams, Colin Kelley
- *
- * Permission to use, copy, and distribute this software and its
- * documentation for any purpose with or without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.
- *
- * Permission to modify the software is granted, but not the right to
- * distribute the modified code. Modifications are to be distributed
- * as patches to released version.
- *
- * This software is provided "as is" without express or implied warranty.
- *
- *
- * AUTHORS
- *
- * Original Software:
- * Thomas Williams, Colin Kelley.
- *
- * Gnuplot 2.0 additions:
- * Russell Lang, Dave Kotz, John Campbell.
- *
- * Gnuplot 3.0 additions:
- * Gershon Elber and many others.
- *
- * Send your comments or suggestions to
- * pixar!info-gnuplot@sun.com.
- * This is a mailing list; to join it send a note to
- * pixar!info-gnuplot-request@sun.com.
- * Send bug reports to
- * pixar!bug-gnuplot@sun.com.
- */
-
- #include <stdio.h>
- #include <setjmp.h>
- #include <signal.h>
- #include "plot.h"
- #include "setshow.h"
- #ifdef MSDOS
- #include <io.h>
- #endif
- #ifdef vms
- #include <unixio.h>
- #include <smgdef.h>
- extern int vms_vkid;
- extern smg$create_virtual_keyboard();
- unsigned int status[2] = {1, 0};
- #endif
- #ifdef AMIGA_LC_5_1
- #include <proto/dos.h>
- #endif
-
- #ifdef __TURBOC__
- #include <graphics.h>
- #endif
-
- extern char *getenv(),*strcat(),*strcpy(),*strncpy();
-
- extern char input_line[];
- extern int c_token;
- extern FILE *outfile;
- extern int term;
-
- BOOLEAN interactive = TRUE; /* FALSE if stdin not a terminal */
- char *infile_name = NULL; /* name of command file; NULL if terminal */
-
- #ifndef STDOUT
- #define STDOUT 1
- #endif
-
- jmp_buf env;
-
- struct value *integer(),*complex();
-
-
- extern f_push(),f_pushc(),f_pushd1(),f_pushd2(),f_call(),f_call2(),f_lnot(),f_bnot(),f_uminus()
- ,f_lor(),f_land(),f_bor(),f_xor(),f_band(),f_eq(),f_ne(),f_gt(),f_lt(),
- f_ge(),f_le(),f_plus(),f_minus(),f_mult(),f_div(),f_mod(),f_power(),
- f_factorial(),f_bool(),f_jump(),f_jumpz(),f_jumpnz(),f_jtern();
-
- extern f_real(),f_imag(),f_arg(),f_conjg(),f_sin(),f_cos(),f_tan(),f_asin(),
- f_acos(),f_atan(),f_sinh(),f_cosh(),f_tanh(),f_int(),f_abs(),f_sgn(),
- f_sqrt(),f_exp(),f_log10(),f_log(),f_besj0(),f_besj1(),f_besy0(),f_besy1(),
- #ifdef GAMMA
- f_gamma(),
- #endif
- f_floor(),f_ceil();
-
-
- struct ft_entry ft[] = { /* built-in function table */
-
- /* internal functions: */
- {"push", f_push}, {"pushc", f_pushc},
- {"pushd1", f_pushd1}, {"pushd2", f_pushd2},
- {"call", f_call}, {"call2", f_call2}, {"lnot", f_lnot},
- {"bnot", f_bnot}, {"uminus", f_uminus}, {"lor", f_lor},
- {"land", f_land}, {"bor", f_bor}, {"xor", f_xor},
- {"band", f_band}, {"eq", f_eq}, {"ne", f_ne},
- {"gt", f_gt}, {"lt", f_lt}, {"ge", f_ge},
- {"le", f_le}, {"plus", f_plus}, {"minus", f_minus},
- {"mult", f_mult}, {"div", f_div}, {"mod", f_mod},
- {"power", f_power}, {"factorial", f_factorial},
- {"bool", f_bool}, {"jump", f_jump}, {"jumpz", f_jumpz},
- {"jumpnz",f_jumpnz},{"jtern", f_jtern},
-
- /* standard functions: */
- {"real", f_real}, {"imag", f_imag}, {"arg", f_arg},
- {"conjg", f_conjg}, {"sin", f_sin}, {"cos", f_cos},
- {"tan", f_tan}, {"asin", f_asin}, {"acos", f_acos},
- {"atan", f_atan}, {"sinh", f_sinh}, {"cosh", f_cosh},
- {"tanh", f_tanh}, {"int", f_int}, {"abs", f_abs},
- {"sgn", f_sgn}, {"sqrt", f_sqrt}, {"exp", f_exp},
- {"log10", f_log10}, {"log", f_log}, {"besj0", f_besj0},
- {"besj1", f_besj1}, {"besy0", f_besy0}, {"besy1", f_besy1},
- #ifdef GAMMA
- {"gamma", f_gamma},
- #endif
- {"floor", f_floor}, {"ceil", f_ceil},
- {NULL, NULL}
- };
-
- static struct udvt_entry udv_pi = {NULL, "pi",FALSE};
- /* first in linked list */
- struct udvt_entry *first_udv = &udv_pi;
- struct udft_entry *first_udf = NULL;
-
-
-
- #ifdef vms
-
- #define HOME "sys$login:"
-
- #else /* vms */
- #ifdef MSDOS
-
- #define HOME "GNUPLOT"
-
- #else /* MSDOS */
-
- #if defined(AMIGA_AC_5) || defined(AMIGA_LC_5_1)
-
- #define HOME "GNUPLOT"
- #else /* AMIGA */
-
- #define HOME "HOME"
-
- #endif /* AMIGA */
- #endif /* MSDOS */
- #endif /* vms */
-
- #ifdef unix
- #define PLOTRC ".gnuplot"
- #else /* unix */
- #if defined(AMIGA_AC_5) || defined(AMIGA_LC_5_1)
- #define PLOTRC ".gnuplot"
- #else /* AMIGA */
- #define PLOTRC "gnuplot.ini"
- #endif /* AMIGA */
- #endif /* unix */
-
- #ifdef __TURBOC__
- void tc_interrupt()
- #else
- #ifdef _CRAY
- void inter(an_int)
- int an_int;
- #else
- inter()
- #endif
- #endif
- {
- #ifdef MSDOS
- #ifdef __TURBOC__
- (void) signal(SIGINT, tc_interrupt);
- #else
- void ss_interrupt();
- (void) signal(SIGINT, ss_interrupt);
- #endif
- #else /* MSDOS */
- (void) signal(SIGINT, inter);
- #endif /* MSDOS */
- (void) signal(SIGFPE, SIG_DFL); /* turn off FPE trapping */
- if (term && term_init)
- (*term_tbl[term].text)(); /* hopefully reset text mode */
- (void) fflush(outfile);
- (void) putc('\n',stderr);
- longjmp(env, TRUE); /* return to prompt */
- }
-
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- /* Register the Borland Graphics Interface drivers. If they have been */
- /* included by the linker. */
-
- #ifdef __TURBOC__
- registerfarbgidriver(EGAVGA_driver_far);
- registerfarbgidriver(CGA_driver_far);
- registerfarbgidriver(Herc_driver_far);
- registerfarbgidriver(ATT_driver_far);
- #endif
- #ifdef X11
- { int n = X11_args(argc, argv); argv += n; argc -= n; }
- #endif
-
- #ifdef apollo
- apollo_pfm_catch();
- #endif
-
- setbuf(stderr,(char *)NULL);
- outfile = stdout;
- (void) complex(&udv_pi.udv_value, Pi, 0.0);
-
- interactive = FALSE;
- init_terminal(); /* can set term type if it likes */
-
- #ifdef AMIGA_LC_5_1
- if (IsInteractive(Input()) == DOSTRUE) interactive = TRUE;
- else interactive = FALSE;
- #else
- interactive = isatty(fileno(stdin));
- #endif
- if (argc > 1)
- interactive = FALSE;
-
- if (interactive)
- show_version();
- #ifdef vms /* initialise screen management routines for command recall */
- if (status[1] = smg$create_virtual_keyboard(&vms_vkid) != SS$_NORMAL)
- done(status[1]);
- #endif
-
- if (!setjmp(env)) {
- /* first time */
- interrupt_setup();
- load_rcfile();
-
- if (interactive && term != 0) /* not unknown */
- fprintf(stderr, "\nTerminal type set to '%s'\n",
- term_tbl[term].name);
- } else {
- /* come back here from int_error() */
- load_file_error(); /* if we were in load_file(), cleanup */
- #ifdef vms
- /* after catching interrupt */
- /* VAX stuffs up stdout on SIGINT while writing to stdout,
- so reopen stdout. */
- if (outfile == stdout) {
- if ( (stdout = freopen("SYS$OUTPUT","w",stdout)) == NULL) {
- /* couldn't reopen it so try opening it instead */
- if ( (stdout = fopen("SYS$OUTPUT","w")) == NULL) {
- /* don't use int_error here - causes infinite loop! */
- fprintf(stderr,"Error opening SYS$OUTPUT as stdout\n");
- }
- }
- outfile = stdout;
- }
- #endif /* VMS */
- if (!interactive)
- done(IO_ERROR); /* exit on non-interactive error */
- }
-
- if (argc > 1) {
- /* load filenames given as arguments */
- while (--argc > 0) {
- ++argv;
- c_token = NO_CARET; /* in case of file not found */
- load_file(fopen(*argv,"r"), *argv);
- }
- } else {
- /* take commands from stdin */
- while(TRUE)
- com_line();
- }
-
- done(IO_SUCCESS);
- }
-
- /* Set up to catch interrupts */
- interrupt_setup()
- {
- #ifdef MSDOS
- #ifdef __TURBOC__
- (void) signal(SIGINT, tc_interrupt); /* go there on interrupt char */
- #else
- void ss_interrupt();
- save_stack(); /* work-around for MSC 4.0/MSDOS 3.x bug */
- (void) signal(SIGINT, ss_interrupt);
- #endif
- #else /* MSDOS */
- (void) signal(SIGINT, inter); /* go there on interrupt char */
- #endif /* MSDOS */
- }
-
-
- /* Look for a gnuplot start-up file */
- load_rcfile()
- {
- register FILE *plotrc;
- static char home[80];
- static char rcfile[sizeof(PLOTRC)+80];
-
- /* Look for a gnuplot init file in . or home directory */
- #ifdef vms
- (void) strcpy(home,HOME);
- #else /* vms */
- #if defined(AMIGA_AC_5) || defined(AMIGA_LC_5_1)
- strcpy(home,getenv(HOME));
- {
- int h;
- h = strlen(home) - 1;
- if (h >= 0) {
- if ((home[h] != ':') && (home[h] != '/')) {
- home[h] = '/';
- home[h+1] = '\0';
- }
- }
- }
- #else /* AMIGA */
- (void) strcat(strcpy(home,getenv(HOME)),"/");
- #endif /* AMIGA */
- #endif /* vms */
- #ifdef NOCWDRC
- /* inhibit check of init file in current directory for security reasons */
- {
- #else
- (void) strcpy(rcfile, PLOTRC);
- plotrc = fopen(rcfile,"r");
- if (plotrc == (FILE *)NULL) {
- #endif
- (void) sprintf(rcfile, "%s%s", home, PLOTRC);
- plotrc = fopen(rcfile,"r");
- }
- if (plotrc)
- load_file(plotrc, rcfile);
- }
-