home *** CD-ROM | disk | FTP | other *** search
- #ifndef lint
- static char *RCSid = "$Id: command.c%v 3.50.1.15 1993/08/21 15:23:42 woo Exp $";
- #endif
-
-
- /* GNUPLOT - command.c */
- /*
- * Copyright (C) 1986 - 1993 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.
- *
- * Changes:
- *
- * Feb 5, 1992 Jack Veenstra (veenstra@cs.rochester.edu) Added support to
- * filter data values read from a file through a user-defined function before
- * plotting. The keyword "thru" was added to the "plot" command. Example
- * syntax: f(x) = x / 100 plot "test.data" thru f(x) This example divides all
- * the y values by 100 before plotting. The filter function processes the
- * data before any log-scaling occurs. This capability should be generalized
- * to filter x values as well and a similar feature should be added to the
- * "splot" command.
- *
- * 19 September 1992 Lawrence Crowl (crowl@cs.orst.edu)
- * Added user-specified bases for log scaling.
- *
- * There is a mailing list for gnuplot users. Note, however, that the
- * newsgroup
- * comp.graphics.gnuplot
- * is identical to the mailing list (they
- * both carry the same set of messages). We prefer that you read the
- * messages through that newsgroup, to subscribing to the mailing list.
- * (If you can read that newsgroup, and are already on the mailing list,
- * please send a message info-gnuplot-request@dartmouth.edu, asking to be
- * removed from the mailing list.)
- *
- * The address for mailing to list members is
- * info-gnuplot@dartmouth.edu
- * and for mailing administrative requests is
- * info-gnuplot-request@dartmouth.edu
- * The mailing list for bug reports is
- * bug-gnuplot@dartmouth.edu
- * The list of those interested in beta-test versions is
- * info-gnuplot-beta@dartmouth.edu
- */
-
- #include <stdio.h>
- #include <math.h>
- #include <ctype.h>
-
- #ifdef AMIGA_AC_5
- #include <time.h>
- void sleep(); /* defined later */
- #endif
-
- #ifdef OS2
- #include <setjmp.h>
- extern jmp_buf env; /* from plot.c */
- #endif
-
- #if defined(MSDOS) || defined(DOS386)
- #ifdef DJGPP
- #include <dos.h>
- #else
- #include <process.h>
- #endif
-
- #ifdef __ZTC__
- #define P_WAIT 0
- #include <time.h> /* usleep() */
- #else
-
- #ifdef __TURBOC__
- #ifndef _Windows
- #include <dos.h> /* sleep() */
- #include <conio.h>
- #include <dir.h> /* setdisk() */
- extern unsigned _stklen = 16394;/* increase stack size */
- #endif
-
- #else /* must be MSC */
- #if !defined(__EMX__) && !defined(DJGPP)
- #ifdef __MSC__
- #include <direct.h> /* for _chdrive() */
- #endif
- #include <time.h> /* kludge to provide sleep() */
- void sleep(); /* defined later */
- #endif /* !__EMX__ && !DJGPP */
- #endif /* TURBOC */
- #endif /* ZTC */
-
- #endif /* MSDOS */
-
- #ifdef ATARI
- #ifdef __PUREC__
- #include <ext.h>
- #include <tos.h>
- #include <aes.h>
- #else
- #include <osbind.h>
- #include <aesbind.h>
- #endif /* __PUREC__ */
- #endif /* ATARI */
-
- #ifdef AMIGA_SC_6_1
- #include <proto/dos.h>
- void sleep();
- #endif /* AMIGA_SC_6_1 */
-
- #include "plot.h"
- #include "setshow.h"
- #ifndef _Windows
- #include "help.h"
- #else
- #define MAXSTR 255
- #endif
-
- #ifndef STDOUT
- #define STDOUT 1
- #endif
-
- #ifndef HELPFILE
- #if defined( MSDOS ) || defined( OS2 ) || defined(DOS386)
- #define HELPFILE "gnuplot.gih"
- #else
- #ifdef AMIGA_SC_6_1
- #define HELPFILE "S:gnuplot.gih"
- #else
- #define HELPFILE "docs/gnuplot.gih" /* changed by makefile */
- #endif /* AMIGA_SC_6_1 */
- #endif
- #endif /* HELPFILE */
-
- #ifdef _Windows
- #include <windows.h>
- #include <setjmp.h>
- #ifdef __MSC__
- #include <malloc.h>
- #else
- #include <alloc.h>
- #include <dir.h> /* setdisk() */
- #endif
- #include "win/wgnuplib.h"
- void sleep();
- extern TW textwin;
- extern jmp_buf FAR env; /* from plot.c */
- extern LPSTR winhelpname;
- extern void screen_dump(void); /* in term/win.trm */
- extern int Pause(LPSTR mess); /* in winmain.c */
- #endif
-
- #define inrange(z,min,max) ((min<max) ? ((z>=min)&&(z<=max)) : ((z>=max)&&(z<=min)) )
-
- /*
- * instead of <strings.h>
- */
-
- #ifndef ATARI
- #ifdef _Windows
- #include <string.h>
- #include <stdlib.h>
- #else
- #ifndef AMIGA_SC_6_1
- extern char *gets(), *getenv();
- #ifdef sequent
- extern char *strcpy(), *strncpy(), *strcat(), *index();
- #else
- extern char *strcpy(), *strncpy(), *strcat(), *strchr();
- #endif
- extern int strlen();
- extern int strcmp();
- extern double atof();
- #endif /* !AMIGA_SC_6_1 */
- #endif
- #else
- #ifdef __PUREC__
- /*
- * a substitute for PureC's buggy sscanf.
- * this uses the normal sscanf and fixes the following bugs:
- * - whitespace in format matches whitespace in string, but doesn't
- * require any. ( "%f , %f" scans "1,2" correctly )
- * - the ignore value feature works (*). this created an address error
- * in PureC.
- */
-
- #include <stdarg.h>
- #include <string.h>
-
- int purec_sscanf( const char *string, const char *format, ... )
- {
- va_list args;
- int cnt=0;
- char onefmt[256];
- char buffer[256];
- const char *f=format;
- const char *s=string;
- char *f2;
- char ch;
- int ignore;
- void *p;
- int *ip;
- int pos;
-
- va_start(args,format);
- while( *f && *s ) {
- ch=*f++;
- if( ch!='%' ) {
- if(isspace(ch)) {
- /* match any number of whitespace */
- while(isspace(*s)) s++;
- } else {
- /* match exactly the character ch */
- if( *s!=ch ) goto finish;
- s++;
- }
- } else {
- /* we have got a '%' */
- ch=*f++;
- if( ch=='%' ) {
- /* match exactly % */
- if( *s!=ch ) goto finish;
- s++;
- } else {
- f2=onefmt;
- *f2++='%';
- *f2++=ch;
- ignore=0;
- if( ch=='*' ) {
- ignore=1;
- ch=f2[-1]=*f++;
- }
- while( isdigit(ch) ) {
- ch=*f2++=*f++;
- }
- if( ch=='l' || ch=='L' || ch=='h' ) {
- ch=*f2++=*f++;
- }
- switch(ch) {
- case '[':
- while( ch && ch!=']' ) {
- ch=*f2++=*f++;
- }
- if( !ch ) goto error;
- break;
- case 'e':
- case 'f':
- case 'g':
- case 'd':
- case 'o':
- case 'i':
- case 'u':
- case 'x':
- case 'c':
- case 's':
- case 'p':
- case 'n': /* special case handled below */
- break;
- default:
- goto error;
- }
- if( ch!='n' ) {
- strcpy(f2,"%n");
- if( ignore ) {
- p=buffer;
- } else {
- p=va_arg(args,void *);
- }
- switch( sscanf( s, onefmt, p, &pos ) ) {
- case EOF: goto error;
- case 0 : goto finish;
- }
- if( !ignore ) cnt++;
- s+=pos;
- } else {
- if( !ignore ) {
- ip=va_arg(args,int *);
- *ip=(int)(s-string);
- }
- }
- }
- }
- }
-
- if( !*f ) goto finish;
-
- error:
- cnt=EOF;
- finish:
- va_end(args);
- return cnt;
- }
-
- /* use the substitute now. I know this is dirty trick, but it works. */
- #define sscanf purec_sscanf
-
- #endif /* __PUREC__ */
- #endif /* ATARI */
-
- /*
- * Only reference to contours library.
- */
- extern struct gnuplot_contours *contour();
-
- #ifdef OS2
- /* emx has getcwd, chdir that can handle drive names */
- #define getcwd _getcwd2
- #define chdir _chdir2
- #endif /* OS2 */
-
- #if defined(unix) && !defined(hpux)
- #ifdef GETCWD
- extern char *getcwd(); /* some Unix's use getcwd */
- #else
- extern char *getwd(); /* most Unix's use getwd */
- #endif
- #else
- #ifdef DJGPP
- extern char *getwd(); /* DJGPP acts like Unix here */
- #else
- extern char *getcwd(); /* Turbo C, MSC, EMX, OS2 and VMS use getcwd */
- #endif
- #endif
-
- #ifdef vms
- int vms_vkid; /* Virtual keyboard id */
- #endif
-
- static FILE *data_fp=NULL; /* != means file still open */
- static TBOOLEAN more_data_fp=FALSE; /* And this explicitly says so. */
-
- #if defined(unix) || defined(PIPES)
- extern FILE *popen();
- static TBOOLEAN pipe_open = FALSE;
- #endif
-
- extern int chdir();
-
- extern double magnitude(), angle(), real(), imag();
- extern struct value *const_express(), *pop(), *Gcomplex();
- extern struct at_type *temp_at(), *perm_at();
- extern struct udft_entry *add_udf();
- extern struct udvt_entry *add_udv();
- extern void squash_spaces();
- extern void lower_case();
-
- /* local functions */
- static enum coord_type adjustlog();
-
- extern TBOOLEAN interactive; /* from plot.c */
-
- /* input data, parsing variables */
- struct lexical_unit token[MAX_TOKENS];
- char input_line[MAX_LINE_LEN + 1] = "";
- int num_tokens, c_token;
- int inline_num = 0; /* input line number */
-
- char c_dummy_var[MAX_NUM_VAR][MAX_ID_LEN + 1]; /* current dummy vars */
-
- /* the curves/surfaces of the plot */
- struct curve_points *first_plot = NULL;
- struct surface_points *first_3dplot = NULL;
- static struct udft_entry plot_func;
- struct udft_entry *dummy_func;
-
- /* jev -- for passing data thru user-defined function */
- static struct udft_entry ydata_func;
-
- /* support for replot command */
- char replot_line[MAX_LINE_LEN + 1] = "";
- static int plot_token; /* start of 'plot' command */
-
- /* If last plot was a 3d one. */
- TBOOLEAN is_3d_plot = FALSE;
-
- com_line()
- {
- if (read_line(PROMPT))
- return(1);
-
- /* So we can flag any new output: if false at time of error, */
- /* we reprint the command line before printing caret. */
- /* TRUE for interactive terminals, since the command line is typed. */
- /* FALSE for non-terminal stdin, so command line is printed anyway. */
- /* (DFK 11/89) */
- screen_ok = interactive;
-
- if (do_line())
- return(1);
- else
- return(0);
- }
-
-
- do_line()
- { /* also used in load_file */
- if (is_system(input_line[0])) {
- do_system();
- (void) fputs("!\n", stderr);
- return(0);
- }
- num_tokens = scanner(input_line);
- c_token = 0;
- while (c_token < num_tokens) {
- if (command())
- return(1);
- if (c_token < num_tokens) /* something after command */
- if (equals(c_token, ";"))
- c_token++;
- else
- int_error("';' expected", c_token);
- }
- return(0);
- }
-
-
-
- command()
- {
- FILE *fp, *lf_top();
- int i;
- char sv_file[MAX_LINE_LEN + 1];
- #if defined(__ZTC__)
- unsigned dummy; /* it's a parameter needed for dos_setdrive */
- #endif
- /* string holding name of save or load file */
-
- for (i = 0; i < MAX_NUM_VAR; i++)
- c_dummy_var[i][0] = '\0'; /* no dummy variables */
-
- if (is_definition(c_token))
- define();
- else if (almost_equals(c_token, "h$elp") || equals(c_token, "?")) {
- c_token++;
- do_help();
- } else if (almost_equals(c_token, "test")) {
- c_token++;
- test_term();
- } else if (almost_equals(c_token, "scr$eendump")) {
- c_token++;
- #ifdef _Windows
- screen_dump();
- #else
- fputs("screendump not implemented\n",stderr);
- #endif
- } else if (almost_equals(c_token, "pa$use")) {
- struct value a;
- int stime, text = 0;
- char buf[MAX_LINE_LEN + 1];
-
- c_token++;
- stime = (int) real(const_express(&a));
- buf[0]='\0';
- if (!(END_OF_COMMAND)) {
- if (!isstring(c_token))
- int_error("expecting string", c_token);
- else {
- quotel_str(buf, c_token);
- #ifdef _Windows
- if (stime>=0)
- #endif
- #ifdef OS2
- if( strcmp(term_tbl[term].name, "pm" )!=0 || stime >=0 )
- #endif
- (void) fprintf(stderr, "%s", buf);
- text = 1;
- }
- }
- if (stime < 0)
- #ifdef _Windows
- {
- if (!Pause(buf))
- longjmp(env, TRUE); /* bail out to command line */
- }
- #else
- #ifdef OS2
- if( strcmp(term_tbl[term].name, "pm" )==0 && stime < 0 )
- {
- int rc ;
- if( (rc=PM_pause( buf ))==0 ) longjmp(env,TRUE) ;
- else if( rc==2 ) {
- (void) fprintf(stderr, "%s", buf);
- text = 1;
- (void) fgets(buf, MAX_LINE_LEN, stdin);
- }
- }
- #else
- (void) fgets(buf, MAX_LINE_LEN, stdin);
- /* Hold until CR hit. */
- #endif /*OS2*/
- #endif
- #ifdef __ZTC__
- if (stime > 0)
- usleep((unsigned long) stime);
- #else
- if (stime > 0)
- sleep((unsigned int) stime);
- #endif
- if (text != 0 && stime >= 0)
- (void) fprintf(stderr, "\n");
- c_token++;
- screen_ok = FALSE;
- } else if (almost_equals(c_token, "pr$int")) {
- struct value a;
-
- c_token++;
- (void) const_express(&a);
- (void) putc('\t', stderr);
- disp_value(stderr, &a);
- (void) putc('\n', stderr);
- screen_ok = FALSE;
- } else if (almost_equals(c_token, "p$lot")) {
- plot_token = c_token++;
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_WAIT));
- #endif
- plotrequest();
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_ARROW));
- #endif
- } else if (almost_equals(c_token, "sp$lot")) {
- plot_token = c_token++;
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_WAIT));
- #endif
- plot3drequest();
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_ARROW));
- #endif
- } else if (almost_equals(c_token, "rep$lot")) {
- if (replot_line[0] == '\0')
- int_error("no previous plot", c_token);
- c_token++;
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_WAIT));
- #endif
- replotrequest();
- #ifdef _Windows
- SetCursor(LoadCursor((HINSTANCE)NULL, IDC_ARROW));
- #endif
- } else if (almost_equals(c_token, "se$t"))
- set_command();
- else if (almost_equals(c_token, "sh$ow"))
- show_command();
- else if (almost_equals(c_token, "cl$ear")) {
- if (!term_init) {
- (*term_tbl[term].init) ();
- term_init = TRUE;
- }
- (*term_tbl[term].graphics) ();
- (*term_tbl[term].text) ();
- (void) fflush(outfile);
- screen_ok = FALSE;
- c_token++;
- } else if (almost_equals(c_token, "she$ll")) {
- do_shell();
- screen_ok = FALSE;
- c_token++;
- } else if (almost_equals(c_token, "sa$ve")) {
- if (almost_equals(++c_token, "f$unctions")) {
- if (!isstring(++c_token))
- int_error("expecting filename", c_token);
- else {
- quote_str(sv_file, c_token);
- save_functions(fopen(sv_file, "w"));
- }
- } else if (almost_equals(c_token, "v$ariables")) {
- if (!isstring(++c_token))
- int_error("expecting filename", c_token);
- else {
- quote_str(sv_file, c_token);
- save_variables(fopen(sv_file, "w"));
- }
- } else if (almost_equals(c_token, "s$et")) {
- if (!isstring(++c_token))
- int_error("expecting filename", c_token);
- else {
- quote_str(sv_file, c_token);
- save_set(fopen(sv_file, "w"));
- }
- } else if (isstring(c_token)) {
- quote_str(sv_file, c_token);
- save_all(fopen(sv_file, "w"));
- } else {
- int_error(
- "filename or keyword 'functions', 'variables', or 'set' expected",
- c_token);
- }
- c_token++;
- } else if (almost_equals(c_token, "l$oad")) {
- if (!isstring(++c_token))
- int_error("expecting filename", c_token);
- else {
- quote_str(sv_file, c_token);
- load_file(fp=fopen(sv_file, "r"), sv_file);
- /* input_line[] and token[] now destroyed! */
- c_token = num_tokens = 0;
- }
- } else if (almost_equals(c_token,"rer$ead")) {
- fp = lf_top();
- if (fp != (FILE *)NULL) rewind(fp);
- c_token++;
- } else if (almost_equals(c_token, "cd")) {
- if (!isstring(++c_token))
- int_error("expecting directory name", c_token);
- else {
- quotel_str(sv_file, c_token);
- #if defined(MSDOS) || defined(_Windows) || defined(ATARI) || defined(DOS386)
- if (!((strlen(sv_file)==2) && isalpha(sv_file[0]) && (sv_file[1]==':')))
- #endif
- if (chdir(sv_file)) {
- int_error("Can't change to this directory", c_token);
- }
- #if defined(MSDOS) || defined(_Windows) || defined(ATARI) || defined(DOS386)
- if (isalpha(sv_file[0]) && (sv_file[1]==':')) {
- #ifdef ATARI
- (void)Dsetdrv(toupper(sv_file[0])-'A');
- #endif
-
- #if defined(__ZTC__)
- (void)dos_setdrive(toupper(sv_file[0]) - 'A' + 1, &dummy);
- #endif
-
- #if defined(MSDOS) && defined(__EMX__)
- (void)_chdrive(toupper(sv_file[0]));
- #endif
- #if defined(__MSC__)
- (void)_chdrive(toupper(sv_file[0])-'A');
- #endif
- #if (defined(MSDOS) || defined(_Windows)) && defined(__TURBOC__)
- (void) setdisk(toupper(sv_file[0])-'A');
- #endif
- #ifdef DJGPP
- { union REGS r;
- r.h.ah = 0x0e;
- r.x.dx = toupper(sv_file[0])-'A';
- intdos(&r, &r);
- }
- #endif
- }
- #endif
- c_token++;
- }
- } else if (almost_equals(c_token, "pwd")) {
- #if defined(unix) && !defined(hpux)
- #ifdef GETCWD
- (void) getcwd(sv_file, MAX_ID_LEN); /* some Unix's use getcwd */
- #else
- (void) getwd(sv_file); /* most Unix's use getwd */
- #endif
- #else
- #ifdef __EMX__
- (void) _getcwd2(sv_file, MAX_ID_LEN);
- #else
- /* Turbo C and VMS have getcwd() */
- (void) getcwd(sv_file, MAX_ID_LEN);
- #endif
- #endif
- #ifdef DJGPP
- { union REGS r;
- r.h.ah = 0x19;
- intdos(&r, &r);
- fprintf(stderr, "%c:", r.h.al + 'a');
- }
- #endif
- fprintf(stderr, "%s\n", sv_file);
- c_token++;
- } else if (almost_equals(c_token, "ex$it") ||
- almost_equals(c_token, "q$uit")) {
- return(1);
- } else if (!equals(c_token, ";")) { /* null statement */
- int_error("invalid command", c_token);
- }
- return(0);
- }
-
- replotrequest()
- {
- char str[MAX_LINE_LEN + 1];
- if (equals(c_token, "["))
- int_error("cannot set range with replot", c_token);
- if (!END_OF_COMMAND) {
- capture(str, c_token, num_tokens - 1);
- if ((strlen(str) + strlen(replot_line)) <= MAX_LINE_LEN - 1) {
- (void) strcat(replot_line, ",");
- (void) strcat(replot_line, str);
- } else {
- int_error("plot line too long with replot arguments", c_token);
- }
- }
- (void) strcpy(input_line, replot_line);
- screen_ok = FALSE;
- num_tokens = scanner(input_line);
- c_token = 1; /* skip the 'plot' part */
- is_3d_plot ? plot3drequest() : plotrequest();
- }
-
-
- plotrequest()
- /*
- * In the parametric case we can say plot [a= -4:4] [-2:2] [-1:1] sin(a),a**2
- * while in the non-parametric case we would say only plot [b= -2:2] [-1:1]
- * sin(b)
- */
- {
- TBOOLEAN changed;
- int dummy_token = -1;
-
- is_3d_plot = FALSE;
-
- if (parametric && strcmp(dummy_var[0], "u") == 0)
- strcpy(dummy_var[0], "t");
-
- autoscale_lt = autoscale_t;
- autoscale_lx = autoscale_x;
- autoscale_ly = autoscale_y;
-
- if (!term) /* unknown */
- int_error("use 'set term' to set terminal type first", c_token);
-
- if (equals(c_token, "[")) {
- c_token++;
- if (isletter(c_token)) {
- if (equals(c_token + 1, "=")) {
- dummy_token = c_token;
- c_token += 2;
- } else {
- /* oops; probably an expression with a variable. */
- /* Parse it as an xmin expression. */
- /* used to be: int_error("'=' expected",c_token); */
- }
- }
- changed = parametric ? load_range(&tmin, &tmax) : load_range(&xmin, &xmax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed) {
- if (parametric)
- autoscale_lt = FALSE;
- else
- autoscale_lx = FALSE;
- }
- }
- if (parametric && equals(c_token, "[")) { /* set optional x ranges */
- c_token++;
- changed = load_range(&xmin, &xmax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- if(parametric)
- autoscale_lt = FALSE;
- else
- autoscale_lx = FALSE;
- }
- if (equals(c_token, "[")) { /* set optional y ranges */
- c_token++;
- changed = load_range(&ymin, &ymax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- autoscale_ly = FALSE;
- }
- /* use the default dummy variable unless changed */
- if (dummy_token >= 0)
- copy_str(c_dummy_var[0], dummy_token);
- else
- (void) strcpy(c_dummy_var[0], dummy_var[0]);
-
- eval_plots();
- }
-
- plot3drequest()
- /*
- * in the parametric case we would say splot [u= -Pi:Pi] [v= 0:2*Pi] [-1:1]
- * [-1:1] [-1:1] sin(v)*cos(u),sin(v)*cos(u),sin(u) in the non-parametric
- * case we would say only splot [x= -2:2] [y= -5:5] sin(x)*cos(y)
- *
- */
- {
- TBOOLEAN changed;
- int dummy_token0 = -1, dummy_token1 = -1;
-
- is_3d_plot = TRUE;
-
- if (parametric && strcmp(dummy_var[0], "t") == 0) {
- strcpy(dummy_var[0], "u");
- strcpy(dummy_var[1], "v");
- }
- autoscale_lx = autoscale_x;
- autoscale_ly = autoscale_y;
- autoscale_lz = autoscale_z;
-
- if (!term) /* unknown */
- int_error("use 'set term' to set terminal type first", c_token);
-
- if (equals(c_token, "[")) {
- c_token++;
- if (isletter(c_token)) {
- if (equals(c_token + 1, "=")) {
- dummy_token0 = c_token;
- c_token += 2;
- } else {
- /* oops; probably an expression with a variable. */
- /* Parse it as an xmin expression. */
- /* used to be: int_error("'=' expected",c_token); */
- }
- }
- changed = parametric ? load_range(&umin, &umax) : load_range(&xmin, &xmax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- if(parametric)
- autoscale_lu = FALSE;
- else
- autoscale_lx = FALSE;
- }
- if (equals(c_token, "[")) {
- c_token++;
- if (isletter(c_token)) {
- if (equals(c_token + 1, "=")) {
- dummy_token1 = c_token;
- c_token += 2;
- } else {
- /* oops; probably an expression with a variable. */
- /* Parse it as an xmin expression. */
- /* used to be: int_error("'=' expected",c_token); */
- }
- }
- changed = parametric ? load_range(&vmin, &vmax) : load_range(&ymin, &ymax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- if(parametric)
- autoscale_lv = FALSE;
- else
- autoscale_ly = FALSE;
- }
- if (equals(c_token, "[")) { /* set optional x (parametric) or z ranges */
- c_token++;
- changed = parametric ? load_range(&xmin, &xmax) : load_range(&zmin, &zmax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- if(parametric)
- autoscale_lx = FALSE;
- else
- autoscale_lz = FALSE;
- }
- if (equals(c_token, "[")) { /* set optional y ranges */
- c_token++;
- changed = load_range(&ymin, &ymax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- autoscale_ly = FALSE;
- }
- if (equals(c_token, "[")) { /* set optional z ranges */
- c_token++;
- changed = load_range(&zmin, &zmax);
- if (!equals(c_token, "]"))
- int_error("']' expected", c_token);
- c_token++;
- if (changed)
- autoscale_lz = FALSE;
- }
- /* use the default dummy variable unless changed */
- if (dummy_token0 >= 0)
- copy_str(c_dummy_var[0], dummy_token0);
- else
- (void) strcpy(c_dummy_var[0], dummy_var[0]);
-
- if (dummy_token1 >= 0)
- copy_str(c_dummy_var[1], dummy_token1);
- else
- (void) strcpy(c_dummy_var[1], dummy_var[1]);
-
- eval_3dplots();
- }
-
-
- define()
- {
- register int start_token;/* the 1st token in the function definition */
- register struct udvt_entry *udv;
- register struct udft_entry *udf;
-
- if (equals(c_token + 1, "(")) {
- /* function ! */
- int dummy_num = 0;
- start_token = c_token;
- do {
- c_token += 2; /* skip to the next dummy */
- copy_str(c_dummy_var[dummy_num++], c_token);
- } while (equals(c_token + 1, ",") && (dummy_num < MAX_NUM_VAR));
- if (equals(c_token + 1, ","))
- int_error("function contains too many parameters", c_token + 2);
- c_token += 3; /* skip (, dummy, ) and = */
- if (END_OF_COMMAND)
- int_error("function definition expected", c_token);
- udf = dummy_func = add_udf(start_token);
- if (udf->at) /* already a dynamic a.t. there */
- free((char *) udf->at); /* so free it first */
- if ((udf->at = perm_at()) == (struct at_type *) NULL)
- int_error("not enough memory for function", start_token);
- m_capture(&(udf->definition), start_token, c_token - 1);
- } else {
- /* variable ! */
- start_token = c_token;
- c_token += 2;
- udv = add_udv(start_token);
- (void) const_express(&(udv->udv_value));
- udv->udv_undef = FALSE;
- }
- }
-
- get_data(this_plot)
- struct curve_points *this_plot;
- {
- register int i, j, l_num, datum;
- int fcol[5], scol[5], ncol[5], prevmin, col;
- char format[MAX_LINE_LEN + 1], data_file[MAX_LINE_LEN + 1],
- line[MAX_LINE_LEN + 1];
- /* conversion variables */
- int n, m, linestat, using;
- char *s;
- double val[5], v[5];
- float fval[5]; /* for use in sscanf */
-
- /* close forgotten input file (in case of a syntax error) */
- if( data_fp ) {
- #if defined(unix) || defined(PIPES)
- if (pipe_open) {
- (void) pclose(data_fp);
- pipe_open = FALSE;
- } else
- #endif /* unix || PIPES */
- (void) fclose(data_fp);
- data_fp=NULL;
- }
-
- quotel_str(data_file, c_token);
- this_plot->plot_type = DATA;
- /* if (parametric)
- int_error("Parametric data files not yet implemented", NO_CARET);
- */
- #if defined(unix) || defined(PIPES)
- if (*data_file == '<') {
- if ((data_fp = popen(data_file + 1, "r")) == (FILE *) NULL)
- os_error("cannot create pipe for data", c_token);
- else
- pipe_open = TRUE;
- } else
- #endif /* unix || PIPES */
- if ((data_fp = fopen(data_file, "r")) == (FILE *) NULL)
- os_error("can't open data file", c_token);
-
- format[0] = '\0';
- for (i=0; i<5; i++)
- fcol[i] = i+1;
-
- using = 0;
- c_token++; /* skip data file name */
-
- /* jev -- support for passing data from file thru user function */
- if (almost_equals(c_token, "thru$")) {
- c_token++;
- if (ydata_func.at)
- free(ydata_func.at);
- dummy_func = &ydata_func;
- ydata_func.at = perm_at();
- } else {
- if (ydata_func.at)
- free(ydata_func.at);
- ydata_func.at = NULL;
- }
-
- if (almost_equals(c_token,"u$sing")) {
- using = 1;
- c_token++; /* skip "using" */
-
- if (!END_OF_COMMAND && !isstring(c_token)) {
- struct value a;
- for (i=0; i<5; i++)
- fcol[i] = -1;
- fcol[0] = (int)magnitude(const_express(&a));
- for (i=1; equals(c_token,":") && i<5; i++) {
- c_token++; /* skip ":" */
- fcol[i] = (int)magnitude(const_express(&a));
- }
- }
-
- if (!END_OF_COMMAND && isstring(c_token)) {
- quotel_str(format, c_token);
- c_token++; /* skip format */
- }
- }
-
- /* sort fcol[] into scol[] removing duplicates */
- prevmin = 0;
- for (i=0; i<5; i++) {
- col = 10000;
- for (j=0; j<5; j++)
- if ((fcol[j]>prevmin) && (fcol[j]<col))
- col = fcol[j];
- if (col <10000)
- prevmin = scol[i] = col;
- else
- scol[i] = 0;
- }
- /* normalise fcol[] into ncol[] */
- for (i=0; i<5; i++) {
- if (fcol[i] > 0)
- for (j=0; j<5; j++) {
- if (fcol[i] == scol[j])
- ncol[i] = j+1;
- }
- else if (fcol[i] == 0)
- ncol[i] = 0;
- else
- ncol[i] = -1;
- }
- /* set col to highest column number */
- col = 0;
- for (i=0; i<5; i++)
- if (fcol[i]>col) col=fcol[i];
-
- l_num = 0;
- datum = 0;
- i = 0;
- while (fgets(line, MAX_LINE_LEN, data_fp) != (char *) NULL) {
- l_num++;
- if (is_comment(line[0]))
- continue; /* ignore comments */
- if (i >= this_plot->p_max) {
- /*
- * overflow about to occur. Extend size of points[] array. We
- * either double the size, or add 1000 points, whichever is a
- * smaller increment. Note i=p_max.
- */
- cp_extend(this_plot, i + (i < 1000 ? i : 1000));
- }
- if (!line[1]) { /* is it blank line ? */
- /* break in data, make next point undefined */
- this_plot->points[i].type = UNDEFINED;
- i++;
- continue;
- }
- if (strlen(format) != 0) {
- /* use old sscanf if a format string was given */
- m = sscanf(line, format, &fval[0], &fval[1], &fval[2], &fval[3], &fval[4]);
- for (n=0; n<5; n++) /* convert floats from sscanf to double */
- val[n] = (double)fval[n];
-
- for (j=0; j<5 && fcol[j]>=0 && fcol[j]-1<m ; j++)
- if (fcol[j])
- v[j] = val[fcol[j]-1];
- else
- v[j] = datum; /* using 0:n */
- }
- else {
- /* implement our own sscanf that skips lines with invalid data
- * if a using statement was given */
- /* convert the array to its constituents */
- for(n=0; n<5; n++) /* wipe the array */
- val[n] = 0.0;
- n=0; /* n is column number */
- m=0; /* m is number of values read */
- linestat = 1; /* linestat: 1 OK 2 bad value 0 EOL */
- s = line;
- while ((linestat == 1) && (n<col)) {
- while (isspace(*s)) s++;
- if (*s == '\0') {
- linestat = 0;
- break;
- }
- n++;
- if (n == scol[m]) {
- if (isdigit(*s) || *s=='-' || *s=='+' || *s=='.') {
- val[m] = atof(s);
- m++;
- }
- else
- linestat = 2; /* abort the line non-digit in req loc */
- }
- while ((!isspace(*s)) && (*s != '\0')) s++;
- }
-
- if (using && (linestat == 2))
- continue; /* skip lines where a using pattern is present and not met */
-
- for (j=0; j<5 && ncol[j]>=0 && ncol[j]-1<m ; j++)
- if (ncol[j])
- v[j] = val[ncol[j]-1];
- else
- v[j] = datum; /* using 0:n */
- }
-
- switch (j) {
- case 1: { /* only one number */
- /* x is index, assign number to y */
- v[1]=v[0];
- v[0]=datum;
- /* nobreak */
- }
- case 2: { /* x, y */
- /* ylow and yhigh are same as y */
- datum++;
- store2d_point(this_plot, i++, v[0], v[1], v[1], v[1], -1.0);
- break;
- }
- case 3: { /* x, y, ydelta */
- /* ydelta is in the ylow variable */
- datum++;
- store2d_point(this_plot, i++, v[0], v[1], v[1]-v[2], v[1]+v[2], -1.0);
- break;
- }
- case 4: { /* x, y, ylow, yhigh */
- datum++;
- store2d_point(this_plot, i++, v[0], v[1], v[2], v[3], -1.0);
- break;
- }
- case 5: { /* x, y, ylow, yhigh, width */
- datum++;
- store2d_point(this_plot, i++, v[0], v[1], v[2], v[3], v[4]);
- break;
- }
- default: {
- (void) sprintf(line, "bad data on line %d", l_num);
- /* close file before exiting to command level */
- #if defined(unix) || defined(PIPES)
- if (pipe_open) {
- (void) pclose(data_fp);
- pipe_open = FALSE;
- } else
- #endif /* unix || PIPES */
- (void) fclose(data_fp);
- data_fp=NULL;
- int_error(line, c_token);
- }
- }
- }
- this_plot->p_count = i;
- cp_extend(this_plot, i); /* shrink to fit */
-
- #if defined(unix) || defined(PIPES)
- if (pipe_open) {
- (void) pclose(data_fp);
- pipe_open = FALSE;
- } else
- #endif /* unix || PIPES */
- (void) fclose(data_fp);
- data_fp=NULL;
- }
-
-
- /* called by get_data for each point */
- store2d_point(this_plot, i, x, y, ylow, yhigh, width)
- struct curve_points *this_plot;
- int i; /* point number */
- double x, y;
- double ylow, yhigh;
- double width;
- {
- struct coordinate GPHUGE *cp = &(this_plot->points[i]);
-
- /* the easy part: */
- cp->type = INRANGE;
- cp->x = x;
- cp->y = y;
- cp->ylow = ylow;
- cp->yhigh = yhigh;
- cp->z = width;
-
- /* jev -- pass data values thru user-defined function */
- if (ydata_func.at) {
- struct value val;
-
- (void) Gcomplex(&ydata_func.dummy_values[0], y, 0.0);
- evaluate_at(ydata_func.at, &val);
- cp->y = real(&val);
-
- (void) Gcomplex(&ydata_func.dummy_values[0], ylow, 0.0);
- evaluate_at(ydata_func.at, &val);
- cp->ylow = real(&val);
-
- (void) Gcomplex(&ydata_func.dummy_values[0], yhigh, 0.0);
- evaluate_at(ydata_func.at, &val);
- cp->yhigh = real(&val);
- }
- /* Adjust for log scale. */
- if (is_log_x) {
- cp->type = adjustlog(cp->type, &(cp->x), log_base_log_x);
- (void) adjustlog(cp->type, &(cp->z), log_base_log_z);
- }
- if (is_log_y) {
- cp->type = adjustlog(cp->type, &(cp->y), log_base_log_y);
- /* Note ylow,yhigh can't affect cp->type. */
- (void) adjustlog(cp->type, &(cp->ylow), log_base_log_y);
- (void) adjustlog(cp->type, &(cp->yhigh), log_base_log_y);
- }
- /* Now adjust the xrange, or declare the point out of range */
- /*
- * The yrange is handled later, once we know whether to include ylow,
- * yhigh in the calculation. See adjust_yrange()
- */
- if (cp->type == INRANGE)
- if (autoscale_lx || inrange(x, xmin, xmax)) {
- if (autoscale_lx) {
- if (x < xmin)
- xmin = x;
- if (x > xmax)
- xmax = x;
- }
- } else {
- cp->type = OUTRANGE;
- }
- }
-
-
- /*
- * Adjust for log scale: take the log of the second parameter, in place, if
- * possible. If not possible, return new type for point; if possible, then
- * return old type for point. The log is taken to the base implicit in the
- * third parameter.
- */
- static enum coord_type
- adjustlog(type, val, log_base_log)
- enum coord_type type;
- coordval *val;
- double log_base_log;
- {
- if (*val < 0.0) {
- return (UNDEFINED);
- } else if (*val == 0.0) {
- *val = -VERYLARGE;
- return (OUTRANGE);
- } else {
- *val = log(*val)/log_base_log;
- return (type);
- }
- }
-
-
- /* now adjust the yrange, or declare the point out of range */
- /* this does all points in a curve */
- adjust_yrange(curve)
- struct curve_points *curve;
- {
- TBOOLEAN ebars = (curve->plot_style == ERRORBARS);
- int npoints = curve->p_count; /* number of points */
- coordval y, ylow, yhigh; /* one point value */
- struct coordinate GPHUGE *cp; /* one coordinate */
- int i; /* index into points */
-
- for (i = 0; i < npoints; i++) {
- cp = &(curve->points[i]);
- if (cp->type == INRANGE) {
- y = is_log_y ? pow(base_log_y, cp->y) : cp->y;
- if ((autoscale_ly ||
- /*
- * inrange((is_log_y ? pow(base_log_y, y) : y), ymin, ymax) ||
- */
- inrange((y), ymin, ymax) ||
- polar)) {
- if (autoscale_ly) {
- if (y < ymin)
- ymin = y;
- if (y > ymax)
- ymax = y;
- if (ebars) {
- ylow = is_log_y ? pow(base_log_y, cp->ylow) : cp->ylow;
- yhigh = is_log_y ? pow(base_log_y, cp->yhigh) : cp->yhigh;
- if (ylow < ymin)
- ymin = ylow;
- if (ylow > ymax)
- ymax = ylow;
- if (yhigh < ymin)
- ymin = yhigh;
- if (yhigh > ymax)
- ymax = yhigh;
- }
- }
- } else {
- cp->type = OUTRANGE;
- }
- }
- }
- }
-
- grid_nongrid_data(this_plot)
- struct surface_points *this_plot;
- {
- int i, j, k;
- double x, y, z, w, dx, dy, xmin, xmax, ymin, ymax;
- struct iso_curve *old_iso_crvs = this_plot->iso_crvs;
- struct iso_curve *icrv, *oicrv, *oicrvs;
-
- /* Compute XY bounding box on the original data. */
- xmin = xmax = old_iso_crvs->points[0].x;
- ymin = ymax = old_iso_crvs->points[0].y;
- for (icrv = old_iso_crvs; icrv != NULL; icrv = icrv->next) {
- struct coordinate GPHUGE *points = icrv->points;
-
- for (i = 0; i < icrv->p_count; i++, points++) {
- if (xmin > points->x)
- xmin = points->x;
- if (xmax < points->x)
- xmax = points->x;
- if (ymin > points->y)
- ymin = points->y;
- if (ymax < points->y)
- ymax = points->y;
- }
- }
-
- dx = (xmax - xmin) / (dgrid3d_row_fineness - 1);
- dy = (ymax - ymin) / (dgrid3d_row_fineness - 1);
-
- /* Create the new grid structure, and compute the low pass filtering from
- * non grid to grid structure.
- */
- this_plot->iso_crvs = NULL;
- this_plot->num_iso_read = dgrid3d_col_fineness;
- this_plot->has_grid_topology = TRUE;
- for (i = 0, x = xmin; i < dgrid3d_col_fineness; i++, x += dx) {
- struct coordinate GPHUGE *points;
-
- icrv = iso_alloc(dgrid3d_row_fineness + 1);
- icrv->p_count = dgrid3d_row_fineness;
- icrv->next = this_plot->iso_crvs;
- this_plot->iso_crvs = icrv;
- points = icrv->points;
-
- for (j = 0, y = ymin; j < dgrid3d_row_fineness; j++, y += dy, points++) {
- z = w = 0.0;
-
- for (oicrv = old_iso_crvs; oicrv != NULL; oicrv = oicrv->next) {
- struct coordinate GPHUGE *opoints = oicrv->points;
- for (k = 0; k < oicrv->p_count; k++, opoints++) {
- double dist,
- dist_x = fabs( opoints->x - x ),
- dist_y = fabs( opoints->y - y );
-
- switch (dgrid3d_norm_value) {
- case 1:
- dist = dist_x + dist_y;
- break;
- case 2:
- dist = dist_x * dist_x + dist_y * dist_y;
- break;
- case 4:
- dist = dist_x * dist_x + dist_y * dist_y;
- dist *= dist;
- break;
- case 8:
- dist = dist_x * dist_x + dist_y * dist_y;
- dist *= dist;
- dist *= dist;
- break;
- case 16:
- dist = dist_x * dist_x + dist_y * dist_y;
- dist *= dist;
- dist *= dist;
- dist *= dist;
- break;
- default:
- dist = pow( dist_x, dgrid3d_norm_value ) +
- pow( dist_y, dgrid3d_norm_value );
- break;
- }
-
- /* The weight of this point is inverse proportional
- * to the distance.
- */
- if ( dist == 0.0 )
- #ifndef AMIGA_SC_6_1
- dist = VERYLARGE;
- #else /* AMIGA_SC_6_1 */
- /* Multiplying VERYLARGE by opoints->z below
- * might yield Inf (i.e. a number that can't
- * be represented on the machine). This will
- * result in points->z being set to NaN. It's
- * better to have a pretty large number that is
- * also on the safe side... The numbers that are
- * read by gnuplot are float values anyway, so
- * they can't be bigger than FLT_MAX. So setting
- * dist to FLT_MAX^2 will make dist pretty large
- * with respect to any value that has been read. */
- dist = ((double)FLT_MAX)*((double)FLT_MAX);
- #endif /* AMIGA_SC_6_1 */
- else
- dist = 1.0 / dist;
-
- z += opoints->z * dist;
- w += dist;
- }
- }
-
- points->x = x;
- points->y = y;
- points->z = z / w;
- points->type = INRANGE;
- }
- }
-
- /* Delete the old non grid data. */
- for (oicrvs = old_iso_crvs; oicrvs != NULL;) {
- oicrv = oicrvs;
- oicrvs = oicrvs->next;
- iso_free(oicrv);
- }
- }
-
- get_3ddata(this_plot)
- struct surface_points *this_plot;
- {
- register int i, j, l_num, xdatum, ydatum;
- float x, y, z;
- char data_file[MAX_LINE_LEN + 1], line[MAX_LINE_LEN + 1];
- char *float_format = "%f", *float_skip = "%*f";
- static TBOOLEAN only_z = FALSE, using_format = FALSE;
- static int xcol = 1, ycol = 2, zcol = 3, index = -1;
- static char format[MAX_LINE_LEN + 1];
- int pt_in_iso_crv = 0, maxcol, num_col;
- enum XYZ_order_type {
- XYZ, YXZ, ZXY, XZY, ZYX, YZX, XY, YX
- } xyz_order;
- struct iso_curve *this_iso;
-
- /* close forgotten file (in case of a syntax error) */
- if (data_fp && !more_data_fp) {
- #if defined(unix) || defined(PIPES)
- if (pipe_open) {
- (void) pclose(data_fp);
- pipe_open = FALSE;
- } else
- #endif /* unix || PIPES */
- (void) fclose(data_fp);
- data_fp=NULL;
- }
-
- quotel_str(data_file, c_token);
- this_plot->plot_type = DATA3D;
- this_plot->has_grid_topology = TRUE;
- if (!more_data_fp) {
- #if defined(unix) || defined(PIPES)
- if (*data_file == '<') {
- if ((data_fp = popen(data_file + 1, "r")) == (FILE *) NULL)
- os_error("cannot create pipe; output not changed", c_token);
- else
- pipe_open = TRUE;
- } else
- #endif /* unix || PIPES */
- if ((data_fp = fopen(data_file, "r")) == (FILE *) NULL)
- os_error("can't open data file", c_token);
-
- /* Initialize defualt values. */
- only_z = FALSE;
- using_format = FALSE;
- xcol = 1;
- ycol = 2;
- zcol = 3;
- index = -1;
- format[0] = '\0';
-
- c_token++; /* skip data file name */
- if (almost_equals(c_token, "i$ndex")) {
- struct value a;
- c_token++; /* skip "index" */
- index = (int) magnitude(const_express(&a));
- }
- if (almost_equals(c_token, "u$sing")) {
- c_token++; /* skip "using" */
- if (!END_OF_COMMAND && !isstring(c_token)) {
- struct value a;
- zcol = (int) magnitude(const_express(&a));
- only_z = TRUE;
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- only_z = FALSE;
- ycol = zcol;
- zcol = (int) magnitude(const_express(&a));
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- xcol = ycol;
- ycol = zcol;
- zcol = (int) magnitude(const_express(&a));
- } else {
- if (mapping3d == MAP3D_CARTESIAN)
- int_error("Must specify 1 or 3 columns", c_token);
- xcol = ycol;
- ycol = zcol;
- }
- }
- if (!only_z)
- if ((xcol == ycol) || (ycol == zcol) || (xcol == zcol))
- int_error("Columns must be distinct", c_token);
- }
- if (!END_OF_COMMAND && isstring(c_token)) {
- quotel_str(format, c_token);
- using_format = TRUE;
- c_token++; /* skip format */
- }
- } else {
- if ( (only_z = !parametric) != FALSE)
- zcol = 1;
- }
- }
-
- switch (mapping3d) {
- case MAP3D_CARTESIAN:
- maxcol = (xcol > ycol) ? xcol : ycol;
- maxcol = (maxcol > zcol) ? maxcol : zcol;
- if (!only_z) { /* Determine ordering of input columns */
- if (zcol == maxcol) {
- if (xcol < ycol)
- xyz_order = XYZ; /* scanf(x,y,z) */
- else
- xyz_order = YXZ; /* scanf(y,x,z) */
- } else if (ycol == maxcol) {
- if (xcol < zcol)
- xyz_order = XZY; /* scanf(x,z,y) */
- else
- xyz_order = ZXY; /* scanf(z,x,y) */
- } else {
- if (ycol < zcol)
- xyz_order = YZX; /* scanf(y,z,x) */
- else
- xyz_order = ZYX; /* scanf(z,y,x) */
- }
- }
- if (strlen(format) == 0) {
- if (only_z) {
- for (i = 1; i <= zcol; i++)
- if (i == zcol)
- (void) strcat(format, float_format);
- else
- (void) strcat(format, float_skip);
- } else {
- for (i = 1; i <= maxcol; i++)
- if ((i == xcol) || (i == ycol) || (i == zcol))
- (void) strcat(format, float_format);
- else
- (void) strcat(format, float_skip);
- }
- }
- break;
- case MAP3D_SPHERICAL:
- case MAP3D_CYLINDRICAL:
- if (only_z)
- int_error("Two or three columns for spherical/cylindrical coords.", c_token);
- maxcol = (xcol > ycol) ? xcol : ycol;
- maxcol = (maxcol > zcol) ? maxcol : zcol;
- xyz_order = (xcol < ycol) ? XY : YX;
- for (i = 1; i <= maxcol; i++)
- if ((i == xcol) || (i == ycol))
- (void) strcat(format, float_format);
- else
- (void) strcat(format, float_skip);
- }
-
- l_num = 0;
- xdatum = 0;
- ydatum = 0;
- this_plot->num_iso_read = 0;
- this_plot->has_grid_topology = TRUE;
- if (this_plot->iso_crvs != NULL) {
- struct iso_curve *icrv, *icrvs = this_plot->iso_crvs;
-
- while (icrvs) {
- icrv = icrvs;
- icrvs = icrvs->next;
- iso_free(icrv);
- }
- this_plot->iso_crvs = NULL;
- }
- if (!more_data_fp && is_binary_file(data_fp)) { /* MOD--RKC */
- #if defined(MSDOS)||defined(ATARI)||defined(OS2)||defined(_Windows)||defined(DOS386)
- /* file must be opened with binary flag. the old cr/lf problem again */
- #ifdef PIPES
- if( pipe_open ) {
- pclose(data_fp);
- data_fp=NULL;
- pipe_open=FALSE;
- int_error("binary data from pipes is not implemented", NO_CARET);
- }
- #endif
- data_fp = freopen(data_file, "rb", data_fp);
- #endif
- xdatum = get_binary_data(this_plot, data_fp, &this_iso);
- } else {
- int last_line_blank = FALSE;
-
- more_data_fp = FALSE;
-
- this_iso = iso_alloc(samples);
-
- if (index > 0) { /* Skip data meshes until mesh index is reached. */
- int i = index;
-
- while (i--) {
- while (fgets(line, MAX_LINE_LEN, data_fp) != (char *) NULL) {
- l_num++;
-
- if (!line[1]) { /* is it blank line ? */
- if (last_line_blank) /* Two consecutive blanks. */
- break;
- last_line_blank = TRUE;
- }
- else
- last_line_blank = FALSE;
- }
- if (feof(data_fp))
- int_error("mesh index overflow", NO_CARET);
- }
- } /* end of index skip */
-
- last_line_blank = FALSE;
-
- while (fgets(line, MAX_LINE_LEN, data_fp) != (char *) NULL) {
- l_num++;
- if (is_comment(line[0]))
- continue; /* ignore comments */
- if (!line[1]) { /* is it blank line ? */
- if (last_line_blank) { /* Two consecutive blank lines. */
- more_data_fp = TRUE;
- break;
- }
- last_line_blank = TRUE;
-
- if (pt_in_iso_crv == 0) {
- if (xdatum == 0)
- continue;
- pt_in_iso_crv = xdatum;
- }
- if (xdatum > 0) {
- this_iso->p_count = xdatum;
- this_iso->next = this_plot->iso_crvs;
- this_plot->iso_crvs = this_iso;
- this_plot->num_iso_read++;
-
- if (xdatum != pt_in_iso_crv)
- this_plot->has_grid_topology = FALSE;
-
- this_iso = iso_alloc(pt_in_iso_crv);
- xdatum = 0;
- ydatum++;
- }
- continue;
- }
- last_line_blank = FALSE;
- if (xdatum >= this_iso->p_max) {
- /*
- * overflow about to occur. Extend size of points[] array. We
- * either double the size, or add 1000 points, whichever is a
- * smaller increment. Note i=p_max.
- */
- iso_extend(this_iso,
- xdatum + (xdatum < 1000 ? xdatum : 1000));
- }
- switch (num_col = sscanf(line, format, &x, &y, &z)) {
- case 3: /* All parameter are specified. */
- if (!only_z || using_format) {
- switch (xyz_order) {
- case XYZ: /* scanf(x,y,z) */
- this_iso->points[xdatum].x = x;
- this_iso->points[xdatum].y = y;
- this_iso->points[xdatum].z = z;
- break;
- case XZY: /* scanf(x,z,y) */
- this_iso->points[xdatum].x = x;
- this_iso->points[xdatum].y = z;
- this_iso->points[xdatum].z = y;
- break;
- case YXZ: /* scanf(y,x,z) */
- this_iso->points[xdatum].x = y;
- this_iso->points[xdatum].y = x;
- this_iso->points[xdatum].z = z;
- break;
- case ZXY: /* scanf(z,x,y) */
- this_iso->points[xdatum].x = y;
- this_iso->points[xdatum].y = z;
- this_iso->points[xdatum].z = x;
- break;
- case YZX: /* scanf(y,z,x) */
- this_iso->points[xdatum].x = z;
- this_iso->points[xdatum].y = x;
- this_iso->points[xdatum].z = y;
- break;
- case ZYX: /* scanf(z,y,x) */
- this_iso->points[xdatum].x = z;
- this_iso->points[xdatum].y = y;
- this_iso->points[xdatum].z = x;
- break;
- }
- if (xyz_order != XYZ) {
- x = this_iso->points[xdatum].x;
- y = this_iso->points[xdatum].y;
- z = this_iso->points[xdatum].z;
- }
- if (!parametric)
- int_error("Must be in parametric mode.",
- NO_CARET);
- break;
- }
- case 1: /* only one number on the line */
- if (!only_z && !using_format)
- int_error("3 columns expected, only 1 found", c_token);
- /* assign that number to z */
- this_iso->points[xdatum].z = x;
- z = x;
- this_iso->points[xdatum].x = xdatum;
- x = this_iso->points[xdatum].x;
- this_iso->points[xdatum].y = ydatum;
- y = this_iso->points[xdatum].y;
- if (parametric)
- int_error("Must be in non parametric mode.",
- NO_CARET);
- break;
- case 2:
- switch (xyz_order) {
- case YX:
- z = x; /* Use z as temp */
- x = y;
- y = z;
- break;
- default:
- break;
- }
- switch (mapping3d) {
- case MAP3D_CARTESIAN:
- int_error("2 columns found, 1 or 3 expected",
- c_token);
- break;
- case MAP3D_SPHERICAL:
- if (angles_format == ANGLES_DEGREES) {
- x *= DEG2RAD; /* Convert to radians. */
- y *= DEG2RAD;
- }
- if( num_col == 2) z = 1.0;
- this_iso->points[xdatum].x = z*cos(x) * cos(y);
- this_iso->points[xdatum].y = z*sin(x) * cos(y);
- this_iso->points[xdatum].z = z*sin(y);
- break;
- case MAP3D_CYLINDRICAL:
- if (angles_format == ANGLES_DEGREES)
- x *= DEG2RAD; /* Convert to radians. */
- if( num_col == 2) z = 1.0;
- this_iso->points[xdatum].x = z*cos(x);
- this_iso->points[xdatum].y = z*sin(x);
- this_iso->points[xdatum].z = y;
- break;
- }
- x = this_iso->points[xdatum].x;
- y = this_iso->points[xdatum].y;
- z = this_iso->points[xdatum].z;
- break;
- default:
- (void) sprintf(line, "bad data on line %d", l_num);
- int_error(line, c_token);
- }
-
- if (is_log_x) {
- if (x <= 0.0)
- int_error("X value must be above 0 for log scale!",
- NO_CARET);
- else
- this_iso->points[xdatum].x =
- log(this_iso->points[xdatum].x)/log_base_log_x;
- }
- if (is_log_y) {
- if (y <= 0.0)
- int_error("Y value must be above 0 for log scale!",
- NO_CARET);
- else
- this_iso->points[xdatum].y =
- log(this_iso->points[xdatum].y)/log_base_log_y;
- }
- if (is_log_z) {
- if (z <= 0.0)
- int_error("Z value must be above 0 for log scale!",
- NO_CARET);
- else
- this_iso->points[xdatum].z =
- log(this_iso->points[xdatum].z)/log_base_log_z;
- }
- if (autoscale_lx) {
- if (x < xmin)
- xmin = x;
- if (x > xmax)
- xmax = x;
- }
- if (autoscale_ly) {
- if (y < ymin)
- ymin = y;
- if (y > ymax)
- ymax = y;
- }
- if (autoscale_lz) {
- if (z < zmin)
- zmin = z;
- if (z > zmax)
- zmax = z;
- }
- xdatum++;
- } /* end of while loop */
-
- if (xdatum > 0) {
- this_plot->num_iso_read++; /* Update last iso. */
- this_iso->p_count = xdatum;
-
- this_iso->next = this_plot->iso_crvs;
- this_plot->iso_crvs = this_iso;
-
- if (xdatum != pt_in_iso_crv)
- this_plot->has_grid_topology = FALSE;
-
- } else {
- iso_free(this_iso); /* Free last allocation. */
- }
- } /* MOD-RKC else of binary */
-
- if (index >= 0) more_data_fp = FALSE; /* Only one data set please. */
-
- if (!more_data_fp) {
- if (this_plot->num_iso_read <= 1)
- this_plot->has_grid_topology = FALSE;
- #if defined(unix) || defined(PIPES)
- if (pipe_open) {
- if (this_plot->has_grid_topology && !hidden3d) {
- (void) pclose(data_fp);
- pipe_open = FALSE;
- }
- } else
- #endif /* unix || PIPES */
- {
- (void) fclose(data_fp);
- data_fp = NULL;
- }
- }
-
- if (dgrid3d) grid_nongrid_data(this_plot);
-
- if (this_plot->num_iso_read <= 1)
- this_plot->has_grid_topology = FALSE;
- if (this_plot->has_grid_topology && !hidden3d) {
- struct iso_curve *new_icrvs = NULL;
- int num_new_iso = this_plot->iso_crvs->p_count, len_new_iso = this_plot->num_iso_read;
-
- /* Now we need to set the other direction (pseudo) isolines. */
- for (i = 0; i < num_new_iso; i++) {
- struct iso_curve *new_icrv = iso_alloc(len_new_iso);
-
- new_icrv->p_count = len_new_iso;
-
- for (j = 0, this_iso = this_plot->iso_crvs;
- this_iso != NULL;
- j++, this_iso = this_iso->next) {
- new_icrv->points[j].x = this_iso->points[i].x;
- new_icrv->points[j].y = this_iso->points[i].y;
- new_icrv->points[j].z = this_iso->points[i].z;
- }
-
- new_icrv->next = new_icrvs;
- new_icrvs = new_icrv;
- }
-
- /* Append the new iso curves after the read ones. */
- for (this_iso = this_plot->iso_crvs;
- this_iso->next != NULL;
- this_iso = this_iso->next);
- this_iso->next = new_icrvs;
- }
- }
-
- /*
- * print_points: a debugging routine to print out the points of a curve, and
- * the curve structure. If curve<0, then we print the list of curves.
- */
-
- static char *plot_type_names[4] =
- {
- "Function", "Data", "3D Function", "3d data"
- };
- static char *plot_style_names[6] =
- {
- "Lines", "Points", "Impulses", "LinesPoints", "Dots", "Errorbars"
- };
-
- print_points(curve)
- int curve; /* which curve to print */
- {
- register struct curve_points *this_plot;
- int i;
-
- if (curve < 0) {
- for (this_plot = first_plot, i = 0;
- this_plot != NULL;
- i++, this_plot = this_plot->next_cp) {
- printf("Curve %d:\n", i);
- if ((int) this_plot->plot_type >= 0 && (int) (this_plot->plot_type) < 4)
- printf("Plot type %d: %s\n", (int) (this_plot->plot_type),
- plot_type_names[(int) (this_plot->plot_type)]);
- else
- printf("Plot type %d: BAD\n", (int) (this_plot->plot_type));
- if ((int) this_plot->plot_style >= 0 && (int) (this_plot->plot_style) < 6)
- printf("Plot style %d: %s\n", (int) (this_plot->plot_style),
- plot_style_names[(int) (this_plot->plot_style)]);
- else
- printf("Plot style %d: BAD\n", (int) (this_plot->plot_style));
- printf("Plot title: '%s'\n", this_plot->title);
- printf("Line type %d\n", this_plot->line_type);
- printf("Point type %d\n", this_plot->point_type);
- printf("max points %d\n", this_plot->p_max);
- printf("current points %d\n", this_plot->p_count);
- printf("\n");
- }
- } else {
- for (this_plot = first_plot, i = 0;
- i < curve && this_plot != NULL;
- i++, this_plot = this_plot->next_cp);
- if (this_plot == NULL)
- printf("Curve %d does not exist; list has %d curves\n", curve, i);
- else {
- printf("Curve %d, %d points\n", curve, this_plot->p_count);
- for (i = 0; i < this_plot->p_count; i++) {
- printf("%c x=%g y=%g z=%g ylow=%g yhigh=%g\n",
- this_plot->points[i].type == INRANGE ? 'i'
- : this_plot->points[i].type == OUTRANGE ? 'o'
- : 'u',
- this_plot->points[i].x,
- this_plot->points[i].y,
- this_plot->points[i].z,
- this_plot->points[i].ylow,
- this_plot->points[i].yhigh);
- }
- printf("\n");
- }
- }
- }
-
- print_table()
- {
- register struct curve_points *this_plot;
- int i, curve;
-
- for (this_plot = first_plot, curve = 0; this_plot != NULL;
- curve++, this_plot = this_plot->next_cp) {
- fprintf(outfile, "Curve %d, %d points\n", curve, this_plot->p_count);
- for (i = 0; i < this_plot->p_count; i++) {
- fprintf(outfile, "%c x=%g y=%g\n",
- this_plot->points[i].type == INRANGE ? 'i'
- : this_plot->points[i].type == OUTRANGE ? 'o'
- : 'u',
- this_plot->points[i].x,
- this_plot->points[i].y);
- }
- fprintf(outfile, "\n");
- }
- fflush(outfile);
- }
-
- print_3dtable(pcount)
- int pcount;
- {
- register struct surface_points *this_plot;
- int i, curve,surface;
- struct iso_curve *icrvs;
- struct coordinate GPHUGE *points;
-
- for (surface=0, this_plot=first_3dplot ; surface < pcount;
- this_plot=this_plot->next_sp, surface++){
- fprintf(outfile, "\nSurface %d of %d surfaces\n", surface, pcount);
- icrvs = this_plot->iso_crvs;
- curve = 0;
-
- while(icrvs){
- fprintf(outfile, "\nIsoCurve %d, %d points\n", curve, icrvs->p_count);
- for(i=0, points = icrvs->points; i < icrvs->p_count; i++){
- fprintf(outfile, "%c x=%g y=%g z=%g\n",
- points[i].type == INRANGE ? 'i'
- : points[i].type == OUTRANGE ? 'o'
- : 'u',
- points[i].x,
- points[i].y,
- points[i].z);
- }
- icrvs = icrvs->next;
- curve++;
- }
- fprintf(outfile, "\n");
- }
- fflush(outfile);
- }
-
- /*
- * This parses the plot command after any range specifications. To support
- * autoscaling on the x axis, we want any data files to define the x range,
- * then to plot any functions using that range. We thus parse the input
- * twice, once to pick up the data files, and again to pick up the functions.
- * Definitions are processed twice, but that won't hurt.
- */
- eval_plots()
- {
- register int i;
- register struct curve_points *this_plot, **tp_ptr;
- register int start_token, end_token;
- register int begin_token;
- double x_min, x_max, y_min, y_max;
- register double x, xdiff, temp;
- static struct value a;
- TBOOLEAN ltmp, some_data_files = FALSE,is_log_func = FALSE;
- int plot_num, line_num, point_num, xparam = 0;
- char *xtitle;
- void parametric_fixup();
-
- /* Reset first_plot. This is usually done at the end of this function.
- If there is an error within this function, the memory is left allocated,
- since we cannot call cp_free if the list is incomplete. Making sure that
- the list structure is always vaild requires some rewriting */
- first_plot=NULL;
-
- if (autoscale_ly) {
- ymin = VERYLARGE;
- ymax = -VERYLARGE;
- } else if (is_log_y && (ymin <= 0.0 || ymax <= 0.0))
- int_error("y range must be above 0 for log scale!",
- NO_CARET);
-
- tp_ptr = &(first_plot);
- plot_num = 0;
- line_num = 0; /* default line type */
- point_num = 0; /* default point type */
-
- xtitle = NULL;
-
- begin_token = c_token;
-
- /*** First Pass: Read through data files ***
- * This pass serves to set the xrange and to parse the command, as well
- * as filling in every thing except the function data. That is done after
- * the xrange is defined.
- */
- while (TRUE) {
- if (END_OF_COMMAND)
- int_error("function to plot expected", c_token);
-
- start_token = c_token;
-
- if (is_definition(c_token)) {
- define();
- } else {
- plot_num++;
-
- if (isstring(c_token)) { /* data file to plot */
- if (parametric && xparam)
- int_error("previous parametric function not fully specified",
- c_token);
-
- if (!some_data_files && autoscale_lx) {
- xmin = VERYLARGE;
- xmax = -VERYLARGE;
- }
- some_data_files = TRUE;
-
- if (*tp_ptr)
- this_plot = *tp_ptr;
- else { /* no memory malloc()'d there yet */
- this_plot = cp_alloc(MIN_CRV_POINTS);
- *tp_ptr = this_plot;
- }
- this_plot->plot_type = DATA;
- this_plot->plot_style = data_style;
- end_token = c_token;
- get_data(this_plot); /* this also parses the using option */
- } else { /* function to plot */
- if (parametric) /* working on x parametric function */
- xparam = 1 - xparam;
- if (*tp_ptr) {
- this_plot = *tp_ptr;
- cp_extend(this_plot, samples + 1);
- } else { /* no memory malloc()'d there yet */
- this_plot = cp_alloc(samples + 1);
- *tp_ptr = this_plot;
- }
- this_plot->plot_type = FUNC;
- this_plot->plot_style = func_style;
- dummy_func = &plot_func;
- plot_func.at = temp_at();
- /* ignore it for now */
- end_token = c_token - 1;
- }
-
- if (almost_equals(c_token, "t$itle")) {
- if (parametric) {
- if (xparam)
- int_error(
- "\"title\" allowed only after parametric function fully specified",
- c_token);
- else if (xtitle != NULL)
- xtitle[0] = '\0'; /* Remove default title . */
- }
- c_token++;
- if (isstring(c_token)) {
- m_quote_capture(&(this_plot->title), c_token, c_token);
- } else {
- int_error("expecting \"title\" for plot", c_token);
- }
- c_token++;
- } else if (almost_equals(c_token, "not$itle")) {
- c_token++;
- } else {
- m_capture(&(this_plot->title), start_token, end_token);
- if (xparam)
- xtitle = this_plot->title;
- }
-
- this_plot->line_type = line_num;
- this_plot->point_type = point_num;
-
- if (almost_equals(c_token, "w$ith")) {
- if (parametric && xparam)
- int_error("\"with\" allowed only after parametric function fully specified",
- c_token);
- this_plot->plot_style = get_style();
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- this_plot->line_type = (int) real(const_express(&t)) - 1;
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- this_plot->point_type = (int) real(const_express(&t)) - 1;
- }
- if ((this_plot->plot_style == POINTSTYLE) ||
- (this_plot->plot_style == LINESPOINTS) ||
- (this_plot->plot_style == ERRORBARS))
- if (!xparam)
- point_num++;
- if (!xparam)
- line_num++;
-
- if (this_plot->plot_type == DATA)
- /* now that we know the plot style, adjust the yrange */
- adjust_yrange(this_plot);
-
- tp_ptr = &(this_plot->next_cp);
- }
-
- if (equals(c_token, ","))
- c_token++;
- else
- break;
- }
-
- if (parametric && xparam)
- int_error("parametric function not fully specified", NO_CARET);
-
- if (parametric) {
- /* Swap t and x ranges for duration of these eval_plot computations. */
- ltmp = autoscale_lx;
- autoscale_lx = autoscale_lt;
- autoscale_lt = ltmp;
- temp = xmin;
- xmin = tmin;
- tmin = temp;
- temp = xmax;
- xmax = tmax;
- tmax = temp;
- }
- /*** Second Pass: Evaluate the functions ***/
- /*
- * Everything is defined now, except the function data. We expect no
- * syntax errors, etc, since the above parsed it all. This makes the code
- * below simpler. If autoscale_ly, the yrange may still change.
- */
- if (fabs(xmax - xmin) < zero)
- if (autoscale_lx) {
- fprintf(stderr, "Warning: empty %c range [%g:%g], ",
- parametric ? 't' : 'x', xmin, xmax);
- if (fabs(xmin) < zero) {
- /* completely arbitary */
- xmin = -1.;
- xmax = 1.;
- } else {
- /* expand range by 10% in either direction */
- xmin = xmin * 0.9;
- xmax = xmax * 1.1;
- }
- fprintf(stderr, "adjusting to [%g:%g]\n", xmin, xmax);
- } else {
- int_error("x range is less than `zero`", c_token);
- }
-
- /* give error if xrange badly set from missing datafile error */
- if (xmin == VERYLARGE || xmax == -VERYLARGE) {
- int_error("x range is invalid", c_token);
- }
- if (is_log_x) {
- if (xmin <= 0.0 || xmax <= 0.0)
- int_error("x range must be greater than 0 for log scale!", NO_CARET);
- x_min = log(xmin)/log_base_log_x;
- x_max = log(xmax)/log_base_log_x;
- } else {
- x_min = xmin;
- x_max = xmax;
- }
-
- xdiff = (x_max - x_min) / (samples - 1);
-
- tp_ptr = &(first_plot);
- plot_num = 0;
- this_plot = first_plot;
- c_token = begin_token; /* start over */
-
- /* Read through functions */
- while (TRUE) {
- if (is_definition(c_token)) {
- define();
- } else {
- plot_num++;
- if (isstring(c_token)) { /* data file to plot */
- /* ignore this now */
- c_token++;
-
- /*
- * jev -- support for passing data from file thru user
- * function
- */
- if (almost_equals(c_token, "thru$")) {
- struct udft_entry tmp;
- c_token++;
- dummy_func = &tmp;
- (void) temp_at();
- }
- if (almost_equals(c_token, "u$sing")) {
- c_token++; /* skip "using" */
- if (!isstring(c_token)) {
- struct value a;
- (void) magnitude(const_express(&a)); /* skip xcol */
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip ycol */
- }
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip yemin */
- }
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip yemax */
- }
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip wcol */
- }
- }
- if (isstring(c_token))
- c_token++; /* skip format string */
- }
- } else { /* function to plot */
- if (parametric) /* working on x parametric function */
- xparam = 1 - xparam;
- dummy_func = &plot_func;
- plot_func.at = temp_at(); /* reparse function */
-
- is_log_func=parametric?(xparam?is_log_x:is_log_y):is_log_y;
- for (i = 0; i < samples; i++) {
- x = x_min + i * xdiff;
- /* if (is_log_x) PEM fix logscale x axis */
- /* x = pow(base_log_x,x); 26-Sep-89 */
- (void) Gcomplex(&plot_func.dummy_values[0],
- is_log_x ? pow(base_log_x, x) : x,
- 0.0);
-
- evaluate_at(plot_func.at, &a);
-
- if (undefined || (fabs(imag(&a)) > zero)) {
- this_plot->points[i].type = UNDEFINED;
- continue;
- }
- temp = real(&a);
-
- if (is_log_func && temp < 0.0) {
- this_plot->points[i].type = UNDEFINED;
- continue;
- }
- this_plot->points[i].x = x;
- this_plot->points[i].z = -1.0; /* width of box not specified */
-
- if (is_log_func) {
- if (temp == 0.0) {
- this_plot->points[i].type = OUTRANGE;
- this_plot->points[i].y = -VERYLARGE;
- continue;
- } else {
- this_plot->points[i].y = log(temp)/log_base_log_y;
- }
- } else
- this_plot->points[i].y = temp;
-
- if (autoscale_ly || polar
- || inrange(temp, ymin, ymax)) {
- this_plot->points[i].type = INRANGE;
- /* When xparam is 1 we are not really computing y's! */
- if (!xparam && autoscale_ly) {
- if (temp < ymin)
- ymin = temp;
- if (temp > ymax)
- ymax = temp;
- }
- } else
- this_plot->points[i].type = OUTRANGE;
- }
- this_plot->p_count = i; /* samples */
- }
-
- /* title was handled above */
- if (almost_equals(c_token, "t$itle")) {
- c_token++;
- c_token++;
- } else if (almost_equals(c_token, "not$itle")) {
- c_token++;
- }
- /* style was handled above */
- if (almost_equals(c_token, "w$ith")) {
- c_token++;
- c_token++;
- }
- /* line and point types were handled above */
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- (void) real(const_express(&t));
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- (void) real(const_express(&t));
- }
- tp_ptr = &(this_plot->next_cp); /* used below */
- this_plot = this_plot->next_cp;
- }
-
- if (equals(c_token, ","))
- c_token++;
- else
- break;
- }
-
- /* throw out all curve_points at end of list, that we don't need */
- cp_free(*tp_ptr);
- *tp_ptr = NULL;
-
- /* if first_plot is NULL, we have no functions or data at all. This can
- happen, if you type "plot x=5", since x=5 is a variable assignment */
-
- if(first_plot==NULL) {
- int_error("no functions or data to plot", c_token);
- }
-
- if (fabs(ymax - ymin) < zero)
- /* if autoscale, widen range */
- if (autoscale_ly) {
- fprintf(stderr, "Warning: empty y range [%g:%g], ", ymin, ymax);
- if (fabs(ymin) < zero) {
- ymin = -1.;
- ymax = 1.;
- } else {
- /* expand range by 10% in either direction */
- ymin = ymin * 0.9;
- ymax = ymax * 1.1;
- }
- fprintf(stderr, "adjusting to [%g:%g]\n", ymin, ymax);
- } else {
- int_error("y range is less than `zero`", c_token);
- }
-
- /* Now we finally know the real ymin and ymax */
- if (is_log_y) {
- y_min = log(ymin)/log_base_log_y;
- y_max = log(ymax)/log_base_log_y;
- } else {
- y_min = ymin;
- y_max = ymax;
- }
-
- /* Set a flag so capture is not invoked by replot itself. -hmh */
- if (plot_token != -1) {
- capture(replot_line, plot_token, c_token);
- plot_token = -1;
- }
-
- if (parametric) {
- /* Now put t and x ranges back before we actually plot anything. */
- ltmp = autoscale_lx;
- autoscale_lx = autoscale_lt;
- autoscale_lt = ltmp;
- temp = xmin;
- xmin = tmin;
- tmin = temp;
- temp = xmax;
- xmax = tmax;
- tmax = temp;
- if (some_data_files && autoscale_lx) {
- /*
- * Stop any further autoscaling in this case (may be a mistake,
- * have to consider what is really wanted some day in the
- * future--jdc).
- */
- autoscale_lx = 0;
- }
- /* Now actually fix the plot pairs to be single plots. */
- parametric_fixup(first_plot, &plot_num, &x_min, &x_max);
- }
- if (strcmp(term_tbl[term].name, "table") == 0)
- print_table();
- else
- do_plot(first_plot, plot_num, x_min, x_max, y_min, y_max);
- cp_free(first_plot);
- first_plot = NULL;
- }
-
- static void
- parse_title(crnt_param, start_token, end_token,
- xtitle, ytitle, this_plot, do_parse)
- int crnt_param, start_token, end_token;
- char **xtitle, **ytitle;
- struct surface_points *this_plot;
- TBOOLEAN do_parse;
- {
- static char title[256];
-
- if (do_parse) {
- if (almost_equals(c_token, "t$itle")) {
- if (parametric) {
- if (crnt_param)
- int_error("\"title\" allowed only after parametric function fully specified",
- c_token);
- else {
- /* Remove default title */
- if (*xtitle != NULL)
- (*xtitle)[0] = '\0';
- if (*ytitle != NULL)
- (*ytitle)[0] = '\0';
- }
- }
- c_token++;
- if (isstring(c_token)) {
- m_quote_capture(&(this_plot->title), c_token, c_token);
- } else {
- int_error("expecting \"title\" for plot", c_token);
- }
- c_token++;
- } else if (almost_equals(c_token, "not$itle")) {
- c_token++;
- } else {
- m_capture(&(this_plot->title), start_token, end_token);
- if (crnt_param == 1)
- *xtitle = this_plot->title;
- if (crnt_param == 2)
- *ytitle = this_plot->title;
- }
- }
- else {
- this_plot->title = alloc(strlen(title) + 1);
- strcpy(this_plot->title, title);
- }
- }
-
- /*
- * This parses the splot command after any range specifications. To support
- * autoscaling on the x/z axis, we want any data files to define the x/y
- * range, then to plot any functions using that range. We thus parse the
- * input twice, once to pick up the data files, and again to pick up the
- * functions. Definitions are processed twice, but that won't hurt.
- */
- eval_3dplots()
- {
- register int i, j;
- register struct surface_points *this_plot=NULL, **tp_3d_ptr;
- register int start_token, end_token;
- register int begin_token;
- double x_min, x_max, y_min, y_max, z_min, z_max;
- register double x, xdiff, xisodiff, y, ydiff, yisodiff, temp;
- static struct value a;
- TBOOLEAN ltmp, some_data_files = FALSE,is_log_func = FALSE;
- int plot_num, line_num, point_num, crnt_param = 0; /* 0=z, 1=x, 2=y */
- char *xtitle;
- char *ytitle;
- void parametric_3dfixup();
-
- /* Reset first_3dplot. This is usually done at the end of this function.
- If there is an error within this function, the memory is left allocated,
- since we cannot call sp_free if the list is incomplete */
- first_3dplot=NULL;
-
- if (autoscale_lz) {
- zmin = VERYLARGE;
- zmax = -VERYLARGE;
- } else if (is_log_z && (zmin <= 0.0 || zmax <= 0.0))
- int_error("z range must be above 0 for log scale!",
- NO_CARET);
-
- tp_3d_ptr = &(first_3dplot);
- plot_num = 0;
- line_num = 0; /* default line type */
- point_num = 0; /* default point type */
-
- xtitle = NULL;
- ytitle = NULL;
-
- begin_token = c_token;
-
- /*** First Pass: Read through data files ***/
- /*
- * This pass serves to set the x/yranges and to parse the command, as
- * well as filling in every thing except the function data. That is done
- * after the x/yrange is defined.
- */
- while (TRUE) {
- if (END_OF_COMMAND)
- int_error("function to plt3d expected", c_token);
-
- start_token = c_token;
-
- if (is_definition(c_token)) {
- define();
- } else {
- plot_num++;
-
- if (isstring(c_token)) { /* data file to plot */
- int line_type = line_num,
- point_type = point_num,
- plot_style = data_style,
- first_mesh = TRUE;
-
- if (parametric && crnt_param != 0)
- int_error("previous parametric function not fully specified",
- c_token);
-
- if (!some_data_files) {
- if (autoscale_lx) {
- xmin = VERYLARGE;
- xmax = -VERYLARGE;
- }
- if (autoscale_ly) {
- ymin = VERYLARGE;
- ymax = -VERYLARGE;
- }
- }
- some_data_files = TRUE;
-
- do {
- if (*tp_3d_ptr)
- this_plot = *tp_3d_ptr;
- else { /* no memory malloc()'d there yet */
- /* Allocate enough isosamples and samples */
- this_plot = sp_alloc(0, 0, 0, 0);
- *tp_3d_ptr = this_plot;
- }
-
- this_plot->plot_type = DATA3D;
- end_token = c_token;
- /* this also parses index/using option */
- get_3ddata(this_plot);
-
- parse_title(crnt_param, start_token, end_token,
- &xtitle, &ytitle, this_plot, first_mesh);
- if (!first_mesh) plot_num++;
-
- if (first_mesh) {
- if (almost_equals(c_token, "w$ith")) {
- plot_style = this_plot->plot_style = get_style();
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- line_type = (int) real(const_express(&t)) - 1;
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- point_type = (int) real(const_express(&t)) - 1;
- }
- first_mesh = FALSE;
- }
-
- this_plot->line_type = line_type;
- this_plot->point_type = point_type;
- this_plot->plot_style = plot_style;
-
- tp_3d_ptr = &(this_plot->next_sp);
- }
- while (more_data_fp);
- } else { /* function to plot */
- if (parametric) /* Rotate between x/y/z axes */
- crnt_param = (crnt_param + 1) % 3;
- if (*tp_3d_ptr) {
- this_plot = *tp_3d_ptr;
- if (!hidden3d)
- sp_replace(this_plot, samples_1, iso_samples_1,
- samples_2, iso_samples_2);
- else
- sp_replace(this_plot, iso_samples_1, 0,
- 0, iso_samples_2);
- } else { /* no memory malloc()'d there yet */
- /* Allocate enough isosamples and samples */
- if (!hidden3d)
- this_plot = sp_alloc(samples_1, iso_samples_1,
- samples_2, iso_samples_2);
- else
- this_plot = sp_alloc(iso_samples_1, 0,
- 0, iso_samples_2);
- *tp_3d_ptr = this_plot;
- }
-
- this_plot->plot_type = FUNC3D;
- this_plot->has_grid_topology = TRUE;
- this_plot->plot_style = func_style;
- dummy_func = &plot_func;
- plot_func.at = temp_at();
- /* ignore it for now */
- end_token = c_token - 1;
-
- parse_title(crnt_param, start_token, end_token,
- &xtitle, &ytitle, this_plot, TRUE);
-
- this_plot->line_type = line_num;
- this_plot->point_type = point_num;
-
- if (almost_equals(c_token, "w$ith")) {
- this_plot->plot_style = get_style();
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- this_plot->line_type = (int) real(const_express(&t)) - 1;
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- this_plot->point_type = (int) real(const_express(&t)) - 1;
- }
-
- tp_3d_ptr = &(this_plot->next_sp);
- }
-
- if ((this_plot->plot_style == POINTSTYLE) ||
- (this_plot->plot_style == LINESPOINTS) ||
- (this_plot->plot_style == ERRORBARS))
- if (crnt_param == 0)
- point_num +=
- 1 + (draw_contour != 0)
- + (hidden3d != 0);
- if (crnt_param == 0)
- line_num += 1 + (draw_contour != 0)
- + (hidden3d != 0);
- }
-
- if (equals(c_token, ","))
- c_token++;
- else
- break;
- }
-
- if (parametric && crnt_param != 0)
- int_error("parametric function not fully specified", NO_CARET);
-
- if (parametric) {
- /*
- * Swap u/v and x/y ranges for duration of these eval_plot
- * computations.
- */
- ltmp = autoscale_lx;
- autoscale_lx = autoscale_lu;
- autoscale_lu = ltmp;
- ltmp = autoscale_ly;
- autoscale_ly = autoscale_lv;
- autoscale_lv = ltmp;
- temp = xmin;
- xmin = umin;
- umin = temp;
- temp = xmax;
- xmax = umax;
- umax = temp;
- temp = ymin;
- ymin = vmin;
- vmin = temp;
- temp = ymax;
- ymax = vmax;
- vmax = temp;
- }
- /*** Second Pass: Evaluate the functions ***/
- /*
- * Everything is defined now, except the function data. We expect no
- * syntax errors, etc, since the above parsed it all. This makes the code
- * below simpler. If autoscale_ly, the yrange may still change.
- */
- if (xmin == xmax)
- if (autoscale_lx) {
- fprintf(stderr, "Warning: empty x range [%g:%g], ",
- xmin, xmax);
- if (xmin == 0.0) {
- /* completely arbitary */
- xmin = -1.;
- xmax = 1.;
- } else {
- /* expand range by 10% in either direction */
- xmin = xmin * 0.9;
- xmax = xmax * 1.1;
- }
- fprintf(stderr, "adjusting to [%g:%g]\n", xmin, xmax);
- } else {
- int_error("x range is empty", c_token);
- }
-
- if (ymin == ymax)
- if (autoscale_ly) {
- fprintf(stderr, "Warning: empty y range [%g:%g], ",
- ymin, ymax);
- if (ymin == 0.0) {
- /* completely arbitary */
- ymin = -1.;
- ymax = 1.;
- } else {
- /* expand range by 10% in either direction */
- ymin = ymin * 0.9;
- ymax = ymax * 1.1;
- }
- fprintf(stderr, "adjusting to [%g:%g]\n", ymin, ymax);
- } else {
- int_error("y range is empty", c_token);
- }
-
- /* give error if xrange badly set from missing datafile error */
- if (xmin == VERYLARGE || xmax == -VERYLARGE) {
- int_error("x range is invalid", c_token);
- }
- if (is_log_x) {
- if (xmin <= 0.0 || xmax <= 0.0)
- int_error("x range must be greater than 0 for log scale!", NO_CARET);
- x_min = log(xmin)/log_base_log_x;
- x_max = log(xmax)/log_base_log_x;
- } else {
- x_min = xmin;
- x_max = xmax;
- }
-
- /* give error if yrange badly set from previous error */
- if (ymin == VERYLARGE || ymax == -VERYLARGE) {
- int_error("y range is invalid", c_token);
- }
- if (is_log_y) {
- if (ymin <= 0.0 || ymax <= 0.0)
- int_error("y range must be greater than 0 for log scale!", NO_CARET);
- y_min = log(ymin)/log_base_log_y;
- y_max = log(ymax)/log_base_log_y;
- } else {
- y_min = ymin;
- y_max = ymax;
- }
-
- if (samples_1 < 2 || samples_2 < 2 || iso_samples_1 < 2 || iso_samples_2 < 2)
- int_error("samples or iso_samples < 2. Must be at least 2.", NO_CARET);
-
- if (this_plot && this_plot->has_grid_topology && hidden3d) {
- xdiff = (x_max - x_min) / (iso_samples_1 - 1);
- ydiff = (y_max - y_min) / (iso_samples_2 - 1);
- } else {
- xdiff = (x_max - x_min) / (samples_1 - 1);
- ydiff = (y_max - y_min) / (samples_2 - 1);
- }
- xisodiff = (x_max - x_min) / (iso_samples_1 - 1);
- yisodiff = (y_max - y_min) / (iso_samples_2 - 1);
-
- this_plot = first_3dplot;
- c_token = begin_token; /* start over */
-
- /* Read through functions */
- while (TRUE) {
- if (is_definition(c_token)) {
- define();
- } else {
- if (isstring(c_token)) { /* data file to plot */
- /* ignore this now */
- c_token++;
- if (almost_equals(c_token, "i$ndex")) {
- struct value a;
- int index;
-
- c_token++; /* skip "index" */
- index = (int) magnitude(const_express(&a));
- }
- if (almost_equals(c_token, "u$sing")) {
- c_token++; /* skip "using" */
- if (!isstring(c_token)) {
- struct value a;
- (void) magnitude(const_express(&a)); /* skip xcol */
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip ycol */
- if (equals(c_token, ":")) {
- c_token++; /* skip ":" */
- (void) magnitude(const_express(&a)); /* skip zcol */
- }
- }
- }
- if (isstring(c_token))
- c_token++; /* skip format string */
- }
- } else { /* function to plot */
- struct iso_curve *this_iso = this_plot->iso_crvs;
- struct coordinate GPHUGE *points = this_iso->points;
- int num_sam_to_use, num_iso_to_use;
-
- if (parametric)
- crnt_param = (crnt_param + 1) % 3;
- dummy_func = &plot_func;
- plot_func.at = temp_at(); /* reparse function */
-
- num_iso_to_use = iso_samples_2;
- if (!(this_plot->has_grid_topology && hidden3d))
- num_sam_to_use = samples_1;
- else
- num_sam_to_use = iso_samples_1;
-
- is_log_func=(!parametric)||(crnt_param==0)?is_log_z:(crnt_param==1?is_log_x:is_log_y);
- for (j = 0; j < num_iso_to_use; j++) {
- y = y_min + j * yisodiff;
- /* if (is_log_y) PEM fix logscale y axis */
- /* y = pow(log_base_log_y,y); 26-Sep-89 */
- (void) Gcomplex(&plot_func.dummy_values[1],
- is_log_y ? pow(base_log_y, y) : y,
- 0.0);
-
- for (i = 0; i < num_sam_to_use; i++) {
- x = x_min + i * xdiff;
- /* if (is_log_x) PEM fix logscale x axis */
- /* x = pow(base_log_x,x); 26-Sep-89 */
- (void) Gcomplex(&plot_func.dummy_values[0],
- is_log_x ? pow(base_log_x, x) : x,
- 0.0);
-
- points[i].x = x;
- points[i].y = y;
-
- evaluate_at(plot_func.at, &a);
-
- if (undefined || (fabs(imag(&a)) > zero)) {
- points[i].type = UNDEFINED;
- continue;
- }
- temp = real(&a);
-
- if (is_log_func && temp < 0.0) {
- points[i].type = UNDEFINED;
- continue;
- }
- if (is_log_func) {
- if (temp == 0.0) {
- points[i].type = OUTRANGE;
- points[i].z = -VERYLARGE;
- continue;
- } else {
- points[i].z = log(temp)/log_base_log_z;
- }
- } else
- points[i].z = temp;
-
- if (autoscale_lz || inrange(temp, zmin, zmax)) {
- points[i].type = INRANGE;
- if (autoscale_lz) {
- if (temp < zmin)
- zmin = temp;
- if (temp > zmax)
- zmax = temp;
- }
- } else
- points[i].type = OUTRANGE;
- }
- this_iso->p_count = num_sam_to_use;
- this_iso = this_iso->next;
- points = this_iso? this_iso->points: NULL;
- }
-
- if (!(this_plot->has_grid_topology && hidden3d)) {
- num_iso_to_use = iso_samples_1;
- num_sam_to_use = samples_2;
- is_log_func=(!parametric)||(crnt_param==0)?is_log_z:(crnt_param==1?is_log_x:is_log_y);
- for (i = 0; i < num_iso_to_use; i++) {
- x = x_min + i * xisodiff;
- /* if (is_log_x) PEM fix logscale x axis */
- /* x = pow(base_log_x,x); 26-Sep-89 */
- (void) Gcomplex(&plot_func.dummy_values[0],
- is_log_x ? pow(base_log_x, x) : x,
- 0.0);
-
- for (j = 0; j < num_sam_to_use; j++) {
- y = y_min + j * ydiff;
- /* if (is_log_y) PEM fix logscale y axis */
- /* y = pow(base_log_y,y); 26-Sep-89 */
- (void) Gcomplex(&plot_func.dummy_values[1],
- is_log_y ? pow(base_log_y, y) : y,
- 0.0);
-
- points[j].x = x;
- points[j].y = y;
-
- evaluate_at(plot_func.at, &a);
-
- if (undefined || (fabs(imag(&a)) > zero)) {
- points[j].type = UNDEFINED;
- continue;
- }
- temp = real(&a);
-
- if (is_log_func && temp < 0.0) {
- points[j].type = UNDEFINED;
- continue;
- }
- if (is_log_func) {
- if (temp == 0.0) {
- points[j].type = OUTRANGE;
- points[j].z = -VERYLARGE;
- continue;
- } else {
- points[j].z = log(temp)/log_base_log_z;
- }
- } else
- points[j].z = temp;
-
- if (autoscale_lz
- || inrange(temp, zmin, zmax)) {
- points[j].type = INRANGE;
- if (autoscale_lz) {
- if (temp < zmin)
- zmin = temp;
- if (temp > zmax)
- zmax = temp;
- }
- } else
- points[j].type = OUTRANGE;
- }
- this_iso->p_count = num_sam_to_use;
- this_iso = this_iso->next;
- points = this_iso ? this_iso->points : NULL;
- }
- }
- }
-
- /* title was handled above */
- if (almost_equals(c_token, "t$itle")) {
- c_token++;
- c_token++;
- } else if (almost_equals(c_token, "not$itle")) {
- c_token++;
- }
- /* style was handled above */
- if (almost_equals(c_token, "w$ith")) {
- c_token++;
- c_token++;
- }
- /* line and point types were handled above */
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- (void) real(const_express(&t));
- }
- if (!equals(c_token, ",") && !END_OF_COMMAND) {
- struct value t;
- (void) real(const_express(&t));
- }
- this_plot = this_plot->next_sp;
- }
-
- if (equals(c_token, ","))
- c_token++;
- else
- break;
- }
-
- /* if first_3dplot is NULL, we have no functions or data at all. This can
- happen, if you type "splot x=5", since x=5 is a variable assignment */
-
- if(first_3dplot==NULL) {
- int_error("no functions or data to plot", c_token);
- }
-
- if (fabs(zmax - zmin) < zero)
- /* if autoscale, widen range */
- if (autoscale_lz) {
- fprintf(stderr, "Warning: empty z range [%g:%g], ", zmin, zmax);
- if (fabs(zmin) < zero) {
- zmin = -1.;
- zmax = 1.;
- } else {
- /* expand range by 10% in either direction */
- zmin = zmin * 0.9;
- zmax = zmax * 1.1;
- }
- fprintf(stderr, "adjusting to [%g:%g]\n", zmin, zmax);
- } else {
- int_error("z range is less than `zero`", c_token);
- }
-
- /* Now we finally know the real zmin and zmax */
- if (is_log_z) {
- if (zmin <= 0.0 || zmax <= 0.0)
- int_error("z range must be greater than 0 for log scale!", NO_CARET);
- z_min = log(zmin)/log_base_log_z;
- z_max = log(zmax)/log_base_log_z;
- } else {
- z_min = zmin;
- z_max = zmax;
- }
-
- /* Set a flag so capture is not invoked by replot itself. -hmh */
- if (plot_token != -1) {
- capture(replot_line, plot_token, c_token);
- plot_token = -1;
- }
-
- if (parametric) {
- /* Now put u/v and x/y ranges back before we actually plot anything. */
- ltmp = autoscale_lx;
- autoscale_lx = autoscale_lu;
- autoscale_lu = ltmp;
- ltmp = autoscale_ly;
- autoscale_ly = autoscale_lv;
- autoscale_lv = ltmp;
- temp = xmin;
- xmin = umin;
- umin = temp;
- temp = xmax;
- xmax = umax;
- umax = temp;
- temp = ymin;
- ymin = vmin;
- vmin = temp;
- temp = ymax;
- ymax = vmax;
- vmax = temp;
-
- /* Now actually fix the plot triplets to be single plots. */
- parametric_3dfixup(first_3dplot, &plot_num,
- &x_min, &x_max, &y_min, &y_max,
- &z_min, &z_max);
- if (is_log_x) {
- if (x_min <= 0.0 || x_max <= 0.0)
- int_error("x range must be greater than 0 for log scale!", NO_CARET);
- x_min = log(x_min)/log_base_log_x;
- x_max = log(x_max)/log_base_log_x;
- }
- if (is_log_y) {
- if (y_min <= 0.0 || y_max <= 0.0)
- int_error("y range must be greater than 0 for log scale!", NO_CARET);
- y_min = log(y_min)/log_base_log_y;
- y_max = log(y_max)/log_base_log_y;
- }
- if (is_log_z) {
- if (z_min <= 0.0 || z_max <= 0.0)
- int_error("z range must be greater than 0 for log scale!", NO_CARET);
- z_min = log(z_min)/log_base_log_z;
- z_max = log(z_max)/log_base_log_z;
- }
- }
-
- /* Filter out empty meshes. */
- while (first_3dplot &&
- first_3dplot->num_iso_read == 0 &&
- first_3dplot->plot_type == DATA3D) {
- struct surface_points *plt = first_3dplot->next_sp;
-
- first_3dplot->next_sp = NULL;
- sp_free(first_3dplot);
- plot_num--;
- first_3dplot = plt;
- }
- if (first_3dplot != NULL) {
- struct surface_points *plt1, *plt2;
-
- for (plt1 = first_3dplot, plt2 = plt1->next_sp; plt2 != NULL; ) {
- if (plt2->num_iso_read == 0 && plt2->plot_type == DATA3D) {
- plt2 = plt2->next_sp;
- plt1->next_sp->next_sp = NULL;
- sp_free(plt1->next_sp);
- plot_num--;
- plt1->next_sp = plt2;
- }
- else {
- plt1 = plt2;
- plt2 = plt2->next_sp;
- }
- }
- }
- if (first_3dplot == NULL)
- int_error("no data found in file", NO_CARET);
-
- /* Creates contours if contours are to be plotted as well. */
- if (draw_contour) {
- for (this_plot = first_3dplot, i = 0;
- i < plot_num;
- this_plot = this_plot->next_sp, i++) {
- if (this_plot->contours) {
- struct gnuplot_contours *cntr, *cntrs = this_plot->contours;
-
- while (cntrs) {
- cntr = cntrs;
- cntrs = cntrs->next;
- gpfarfree(cntr->coords);
- free(cntr);
- }
- }
- /* Make sure this one can be contoured. */
- if (!this_plot->has_grid_topology) {
- this_plot->contours = NULL;
- fprintf(stderr,"Notice: cannot contour non grid data!\n");
- /* changed from int_error by recommendation of rkc@xn.ll.mit.edu */
- }
- else if (this_plot->plot_type == DATA3D)
- this_plot->contours = contour(
- this_plot->num_iso_read,
- this_plot->iso_crvs,
- contour_levels, contour_pts,
- contour_kind, contour_order,
- levels_kind, levels_list);
- else
- this_plot->contours = contour(iso_samples_2,
- this_plot->iso_crvs,
- contour_levels, contour_pts,
- contour_kind, contour_order,
- levels_kind, levels_list);
- }
- }
- if (strcmp(term_tbl[term].name, "table") == 0)
- print_3dtable(plot_num);
- else
- do_3dplot(first_3dplot, plot_num, x_min, x_max, y_min, y_max, z_min, z_max);
- sp_free(first_3dplot);
- first_3dplot = NULL;
- }
-
- done(status)
- int status;
- {
- if (term && term_init)
- (*term_tbl[term].reset) ();
- #ifdef vms
- vms_reset();
- #endif
- exit(status);
- }
-
- void
- parametric_fixup(start_plot, plot_num, x_min, x_max)
- struct curve_points *start_plot;
- int *plot_num;
- double *x_min, *x_max;
- /*
- * The hardest part of this routine is collapsing the FUNC plot types in the
- * list (which are gauranteed to occur in (x,y) pairs while preserving the
- * non-FUNC type plots intact. This means we have to work our way through
- * various lists. Examples (hand checked): start_plot:F1->F2->NULL ==>
- * F2->NULL start_plot:F1->F2->F3->F4->F5->F6->NULL ==> F2->F4->F6->NULL
- * start_plot:F1->F2->D1->D2->F3->F4->D3->NULL ==> F2->D1->D2->F4->D3->NULL
- *
- * Of course, the more interesting work is to move the y values of the x
- * function to become the x values of the y function (checking the mins and
- * maxs as we go along).
- */
- {
- struct curve_points *xp, *new_list, *yp = start_plot, *tmp, *free_list,
- *free_head = NULL;
- int i, tlen, curve;
- char *new_title;
- double lxmin, lxmax, temp;
-
- if (autoscale_lx) {
- lxmin = VERYLARGE;
- lxmax = -VERYLARGE;
- } else {
- lxmin = xmin;
- lxmax = xmax;
- }
-
- /*
- * Ok, go through all the plots and move FUNC types together. Note: this
- * originally was written to look for a NULL next pointer, but gnuplot
- * wants to be sticky in grabbing memory and the right number of items in
- * the plot list is controlled by the plot_num variable.
- *
- * Since gnuplot wants to do this sticky business, a free_list of
- * curve_points is kept and then tagged onto the end of the plot list as
- * this seems more in the spirit of the original memory behavior than
- * simply freeing the memory. I'm personally not convinced this sort of
- * concern is worth it since the time spent computing points seems to
- * dominate any garbage collecting that might be saved here...
- */
- new_list = xp = start_plot;
- yp = xp->next_cp;
- curve = 0;
-
- for (; curve < *plot_num; xp = xp->next_cp, yp = yp ? yp->next_cp : yp, curve++) {
- if (xp->plot_type != FUNC) {
- continue;
- }
- /* Here's a FUNC parametric function defined as two parts. */
- --(*plot_num);
- /*
- * Go through all the points assigning the y's from xp to be the x's
- * for yp. Check max's and min's as you go.
- */
- for (i = 0; i < yp->p_count; ++i) {
- /*
- * Throw away excess xp points, mark excess yp points as
- * OUTRANGE.
- */
- if (i > xp->p_count) {
- yp->points[i].type = OUTRANGE;
- continue;
- }
- /*
- * Just as we had to do when we computed y values--now check that
- * x's (computed parametrically) are in the permitted ranges as
- * well.
- */
- temp = xp->points[i].y; /* New x value for yp function. */
- yp->points[i].x = temp;
- /* Handle undefined values differently from normal ranges. */
- if (xp->points[i].type == UNDEFINED)
- yp->points[i].type = xp->points[i].type;
- if (autoscale_lx || polar
- || inrange(temp, lxmin, lxmax)) {
- if (autoscale_lx && temp < lxmin)
- lxmin = temp;
- if (autoscale_lx && temp > lxmax)
- lxmax = temp;
- } else
- yp->points[i].type = OUTRANGE; /* Due to x value. */
- }
- /* Ok, fix up the title to include both the xp and yp plots. */
- if (xp->title && xp->title[0] != '\0') {
- tlen = strlen(yp->title) + strlen(xp->title) + 3;
- new_title = alloc((unsigned long) tlen, "string");
- strcpy(new_title, xp->title);
- strcat(new_title, ", "); /* + 2 */
- strcat(new_title, yp->title); /* + 1 = + 3 */
- free(yp->title);
- yp->title = new_title;
- }
- /* Eliminate the first curve (xparam) and just use the second. */
- if (xp == start_plot) {
- /* Simply nip off the first element of the list. */
- new_list = first_plot = yp;
- xp = xp->next_cp;
- if (yp->next_cp != NULL)
- yp = yp->next_cp;
- /* Add start_plot to the free_list. */
- if (free_head == NULL) {
- free_list = free_head = start_plot;
- free_head->next_cp = NULL;
- } else {
- free_list->next_cp = start_plot;
- start_plot->next_cp = NULL;
- free_list = start_plot;
- }
- } else {
- /* Here, remove the xp node and replace it with the yp node. */
- tmp = xp;
- /* Pass over any data files that might have been in place. */
- while (new_list->next_cp && new_list->next_cp != xp)
- new_list = new_list->next_cp;
- new_list->next_cp = yp;
- new_list = new_list->next_cp;
- xp = xp->next_cp;
- if (yp->next_cp != NULL)
- yp = yp->next_cp;
- /* Add tmp to the free_list. */
- tmp->next_cp = NULL;
- if (free_head == NULL) {
- free_list = free_head = tmp;
- } else {
- free_list->next_cp = tmp;
- free_list = tmp;
- }
- }
- }
- /* Ok, stick the free list at the end of the curve_points plot list. */
- while (new_list->next_cp != NULL)
- new_list = new_list->next_cp;
- new_list->next_cp = free_head;
-
- /* Report the overall graph mins and maxs. */
- *x_min = lxmin;
- *x_max = lxmax;
- }
-
- void
- parametric_3dfixup(start_plot, plot_num, x_min, x_max, y_min, y_max,
- z_min, z_max)
- struct surface_points *start_plot;
- int *plot_num;
- double *x_min, *x_max, *y_min, *y_max, *z_min, *z_max;
- /*
- * The hardest part of this routine is collapsing the FUNC plot types in the
- * list (which are gauranteed to occur in (x,y,z) triplets while preserving
- * the non-FUNC type plots intact. This means we have to work our way
- * through various lists. Examples (hand checked):
- * start_plot:F1->F2->F3->NULL ==> F3->NULL
- * start_plot:F1->F2->F3->F4->F5->F6->NULL ==> F3->F6->NULL
- * start_plot:F1->F2->F3->D1->D2->F4->F5->F6->D3->NULL ==>
- * F3->D1->D2->F6->D3->NULL
- */
- {
- struct surface_points *xp, *yp, *zp, *new_list, *tmp, *free_list, *free_head = NULL;
- struct iso_curve *icrvs, *xicrvs, *yicrvs, *zicrvs;
- int i, tlen, surface;
- char *new_title;
- double lxmin, lxmax, lymin, lymax, lzmin, lzmax;
-
- if (autoscale_lx) {
- lxmin = VERYLARGE;
- lxmax = -VERYLARGE;
- } else {
- lxmin = xmin;
- lxmax = xmax;
- }
-
- if (autoscale_ly) {
- lymin = VERYLARGE;
- lymax = -VERYLARGE;
- } else {
- lymin = ymin;
- lymax = ymax;
- }
-
- if (autoscale_lz) {
- lzmin = VERYLARGE;
- lzmax = -VERYLARGE;
- } else {
- lzmin = zmin;
- lzmax = zmax;
- }
-
- /*
- * Ok, go through all the plots and move FUNC3D types together. Note:
- * this originally was written to look for a NULL next pointer, but
- * gnuplot wants to be sticky in grabbing memory and the right number of
- * items in the plot list is controlled by the plot_num variable.
- *
- * Since gnuplot wants to do this sticky business, a free_list of
- * surface_points is kept and then tagged onto the end of the plot list
- * as this seems more in the spirit of the original memory behavior than
- * simply freeing the memory. I'm personally not convinced this sort of
- * concern is worth it since the time spent computing points seems to
- * dominate any garbage collecting that might be saved here...
- */
- new_list = xp = start_plot;
- for (surface = 0; surface < *plot_num; surface++) {
- if (xp->plot_type != FUNC3D) {
- icrvs = xp->iso_crvs;
-
- while (icrvs) {
- struct coordinate GPHUGE *points = icrvs->points;
-
- for (i = 0; i < icrvs->p_count; ++i) {
- if (lxmin > points[i].x)
- lxmin = points[i].x;
- if (lxmax < points[i].x)
- lxmax = points[i].x;
- if (lymin > points[i].y)
- lymin = points[i].y;
- if (lymax < points[i].y)
- lymax = points[i].y;
- if (lzmin > points[i].z)
- lzmin = points[i].z;
- if (lzmax < points[i].z)
- lzmax = points[i].z;
- }
-
- icrvs = icrvs->next;
- }
- xp = xp->next_sp;
- continue;
- }
- yp = xp->next_sp;
- zp = yp->next_sp;
-
- /* Here's a FUNC3D parametric function defined as three parts. */
- (*plot_num) -= 2;
- /*
- * Go through all the points and assign the x's and y's from xp and
- * yp to zp. Check max's and min's as you go.
- */
- xicrvs = xp->iso_crvs;
- yicrvs = yp->iso_crvs;
- zicrvs = zp->iso_crvs;
- while (zicrvs) {
- struct coordinate GPHUGE *xpoints = xicrvs->points, GPHUGE *ypoints = yicrvs->points, GPHUGE *zpoints = zicrvs->points;
- for (i = 0; i < zicrvs->p_count; ++i) {
- zpoints[i].x = xpoints[i].z;
- zpoints[i].y = ypoints[i].z;
-
- if (lxmin > zpoints[i].x)
- lxmin = zpoints[i].x;
- if (lxmax < zpoints[i].x)
- lxmax = zpoints[i].x;
- if (lymin > zpoints[i].y)
- lymin = zpoints[i].y;
- if (lymax < zpoints[i].y)
- lymax = zpoints[i].y;
- if (lzmin > zpoints[i].z)
- lzmin = zpoints[i].z;
- if (lzmax < zpoints[i].z)
- lzmax = zpoints[i].z;
- }
- xicrvs = xicrvs->next;
- yicrvs = yicrvs->next;
- zicrvs = zicrvs->next;
- }
-
- /* Ok, fix up the title to include xp and yp plots. */
- if ((xp->title && xp->title[0] != '\0') ||
- (yp->title && yp->title[0] != '\0')) {
- tlen = (xp->title ? strlen(xp->title) : 0) +
- (yp->title ? strlen(yp->title) : 0) +
- (zp->title ? strlen(zp->title) : 0) + 5;
- new_title = alloc((unsigned long) tlen, "string");
- new_title[0] = 0;
- if (xp->title) {
- strcat(new_title, xp->title);
- strcat(new_title, ", "); /* + 2 */
- }
- if (yp->title) {
- strcat(new_title, yp->title);
- strcat(new_title, ", "); /* + 2 */
- }
- if (zp->title) {
- strcat(new_title, zp->title);
- }
- free(zp->title);
- zp->title = new_title;
- }
- /*
- * Eliminate the first two surfaces (xp and yp) and just use the
- * third.
- */
- if (xp == start_plot) {
- /* Simply nip off the first two elements of the list. */
- new_list = first_3dplot = zp;
- xp = zp->next_sp;
- /* Add xp and yp to the free_list. */
- if (free_head == NULL) {
- free_head = start_plot;
- } else {
- free_list->next_sp = start_plot;
- }
- free_list = start_plot->next_sp;
- free_list->next_sp = NULL;
- } else {
- /*
- * Here, remove the xp,yp nodes and replace them with the zp
- * node.
- */
- tmp = xp;
- /* Pass over any data files that might have been in place. */
- while (new_list->next_sp && new_list->next_sp != xp)
- new_list = new_list->next_sp;
- new_list->next_sp = zp;
- new_list = zp;
- xp = zp->next_sp;
- /* Add tmp to the free_list. */
- if (free_head == NULL) {
- free_head = tmp;
- } else {
- free_list->next_sp = tmp;
- }
- free_list = tmp->next_sp;
- free_list->next_sp = NULL;
- }
- }
- /* Ok, stick the free list at the end of the surface_points plot list. */
- while (new_list->next_sp != NULL)
- new_list = new_list->next_sp;
- new_list->next_sp = free_head;
- if (lxmax - lxmin < zero) {
- if (fabs(lxmax) < zero) {
- lxmin = -1.0;
- lxmax = 1.0;
- } else {
- lxmin *= 0.9;
- lxmax *= 1.1;
- }
- }
- if (lymax - lymin < zero) {
- if (fabs(lymax) < zero) {
- lymin = -1.0;
- lymax = 1.0;
- } else {
- lymin *= 0.9;
- lymax *= 1.1;
- }
- }
- if (lzmax - lzmin < zero) {
- if (fabs(lzmax) < zero) {
- lzmin = -1.0;
- lzmax = 1.0;
- } else {
- lzmin *= 0.9;
- lzmax *= 1.1;
- }
- }
- /* Report the overall graph mins and maxs. */
- if (autoscale_lx) {
- *x_min = (is_log_x ? pow(base_log_x, lxmin) : lxmin);
- *x_max = (is_log_x ? pow(base_log_x, lxmax) : lxmax);
- } else {
- *x_min = xmin;
- *x_max = xmax;
- }
- if (autoscale_ly) {
- *y_min = (is_log_y ? pow(base_log_y, lymin) : lymin);
- *y_max = (is_log_y ? pow(base_log_y, lymax) : lymax);
- } else {
- *y_min = ymin;
- *y_max = ymax;
- }
- if (autoscale_lz) {
- *z_min = (is_log_z ? pow(base_log_z, lzmin) : lzmin);
- *z_max = (is_log_z ? pow(base_log_z, lzmax) : lzmax);
- } else {
- *z_min = zmin;
- *z_max = zmax;
- }
- }
-
- #ifdef AMIGA_SC_6_1
- void
- sleep(delay)
- unsigned int delay;
- {
- Delay(50 * delay);
- }
- #endif
-
- #ifdef AMIGA_AC_5
- void
- sleep(delay)
- unsigned int delay;
- {
- unsigned long time_is_up;
- time_is_up = time(NULL) + (unsigned long) delay;
- while (time(NULL) < time_is_up)
- /* wait */ ;
- }
- #endif
-
- #if defined(MSDOS) || defined(_Windows) || defined(DOS386)
- #if (!defined(__TURBOC__) && !defined(__EMX__) && !defined(DJGPP)) || defined(_Windows) /* Turbo C already has sleep() */
- #ifndef __ZTC__ /* ZTC already has usleep() */
- /* kludge to provide sleep() for msc 5.1 */
- void
- sleep(delay)
- unsigned int delay;
- {
- unsigned long time_is_up;
- time_is_up = time(NULL) + (unsigned long) delay;
- while (time(NULL) < time_is_up)
- /* wait */ ;
- }
- #endif /* not ZTC */
- #endif /* (!TURBOC && !__EMX__ && !DJGPP) or _Windows */
- #endif /* MSDOS || _Windows*/
-
-
- /* Support for input, shell, and help for various systems */
-
- #ifdef vms
-
- #include <descrip.h>
- #include <rmsdef.h>
- #include <errno.h>
- #include <smgdef.h>
- #include <smgmsg.h>
-
- extern lib$get_input(), lib$put_output();
- extern smg$read_composed_line();
-
- int vms_len;
-
- unsigned int status[2] =
- {1, 0};
-
- static char help[MAX_LINE_LEN + 1] = "gnuplot";
-
- $DESCRIPTOR(prompt_desc, PROMPT);
- $DESCRIPTOR(line_desc, input_line);
-
- $DESCRIPTOR(help_desc, help);
- $DESCRIPTOR(helpfile_desc, "GNUPLOT$HELP");
-
-
- read_line(prompt)
- char *prompt;
- {
- int more, start = 0;
- char expand_prompt[40];
-
- prompt_desc.dsc$w_length = strlen(prompt);
- prompt_desc.dsc$a_pointer = prompt;
- (void) strcpy(expand_prompt, "_");
- (void) strncat(expand_prompt, prompt, 38);
- do {
- line_desc.dsc$w_length = MAX_LINE_LEN - start;
- line_desc.dsc$a_pointer = &input_line[start];
- switch (status[1] = smg$read_composed_line(&vms_vkid, 0, &line_desc, &prompt_desc, &vms_len)) {
- case SMG$_EOF:
- done(IO_SUCCESS); /* ^Z isn't really an error */
- break;
- case RMS$_TNS: /* didn't press return in time */
- vms_len--; /* skip the last character */
- break; /* and parse anyway */
- case RMS$_BES: /* Bad Escape Sequence */
- case RMS$_PES: /* Partial Escape Sequence */
- sys$putmsg(status);
- vms_len = 0; /* ignore the line */
- break;
- case SS$_NORMAL:
- break; /* everything's fine */
- default:
- done(status[1]); /* give the error message */
- }
- start += vms_len;
- input_line[start] = '\0';
- inline_num++;
- if (input_line[start - 1] == '\\') {
- /* Allow for a continuation line. */
- prompt_desc.dsc$w_length = strlen(expand_prompt);
- prompt_desc.dsc$a_pointer = expand_prompt;
- more = 1;
- --start;
- } else {
- line_desc.dsc$w_length = strlen(input_line);
- line_desc.dsc$a_pointer = input_line;
- more = 0;
- }
- } while (more);
- return 0;
- }
-
-
- do_help()
- {
- help_desc.dsc$w_length = strlen(help);
- if ((vaxc$errno = lbr$output_help(lib$put_output, 0, &help_desc,
- &helpfile_desc, 0, lib$get_input)) != SS$_NORMAL)
- os_error("can't open GNUPLOT$HELP", NO_CARET);
- }
-
-
- do_shell()
- {
- if ((vaxc$errno = lib$spawn()) != SS$_NORMAL) {
- os_error("spawn error", NO_CARET);
- }
- }
-
-
- do_system()
- {
- input_line[0] = ' '; /* an embarrassment, but... */
-
- if ((vaxc$errno = lib$spawn(&line_desc)) != SS$_NORMAL)
- os_error("spawn error", NO_CARET);
-
- (void) putc('\n', stderr);
- }
-
- #else /* vms */
-
- #ifdef _Windows
- do_help()
- {
- if (END_OF_COMMAND)
- WinHelp(textwin.hWndParent,(LPSTR)winhelpname,HELP_INDEX,(DWORD)NULL);
- else {
- char buf[128];
- int start = c_token++;
- while (!(END_OF_COMMAND))
- c_token++;
- capture(buf, start, c_token-1);
- WinHelp(textwin.hWndParent,(LPSTR)winhelpname,HELP_PARTIALKEY,(DWORD)buf);
- }
- }
- #else
-
- /*
- * do_help: (not VMS, although it would work) Give help to the user. It
- * parses the command line into helpbuf and supplies help for that string.
- * Then, if there are subtopics available for that key, it prompts the user
- * with this string. If more input is given, do_help is called recursively,
- * with the argument the index of null character in the string. Thus a more
- * specific help can be supplied. This can be done repeatedly. If null input
- * is given, the function returns, effecting a backward climb up the tree.
- * David Kotz (David.Kotz@Dartmouth.edu) 10/89
- */
-
- do_help()
- {
- static char *helpbuf = NULL;
- static char *prompt = NULL;
- int base; /* index of first char AFTER help string */
- int len; /* length of current help string */
- TBOOLEAN more_help;
- TBOOLEAN only; /* TRUE if only printing subtopics */
- int subtopics; /* 0 if no subtopics for this topic */
- int start; /* starting token of help string */
- char *help_ptr; /* name of help file */
- #ifdef ATARI
- static char help_fname[256]=""; /* keep helpfilename across calls */
- #endif
-
- if ((help_ptr = getenv("GNUHELP")) == (char *) NULL)
- #ifndef ATARI
- /* if can't find environment variable then just use HELPFILE */
- help_ptr = HELPFILE;
- #else
- /* try whether we can find the helpfile via shell_find. If not, just
- use the default. (tnx Andreas) */
-
- #ifdef sequent
- if( !index( HELPFILE, ':' ) && !index( HELPFILE, '/' ) &&
- !index( HELPFILE, '\\' ) ) {
- #else
- if( !strchr( HELPFILE, ':' ) && !strchr( HELPFILE, '/' ) &&
- !strchr( HELPFILE, '\\' ) ) {
- #endif
- if( strlen(help_fname)==0 ) {
- strcpy( help_fname, HELPFILE );
- if( shel_find( help_fname )==0 ) {
- strcpy( help_fname, HELPFILE );
- }
- }
- help_ptr=help_fname;
- } else {
- help_ptr=HELPFILE;
- }
- #endif /* ATARI */
-
- /* Since MSDOS DGROUP segment is being overflowed we can not allow such */
- /* huge static variables (1k each). Instead we dynamically allocate them */
- /* on the first call to this function... */
- if (helpbuf == NULL) {
- helpbuf = alloc((unsigned long)MAX_LINE_LEN, "help buffer");
- prompt = alloc((unsigned long)MAX_LINE_LEN, "help prompt");
- helpbuf[0] = prompt[0] = 0;
- }
- len = base = strlen(helpbuf);
-
- /* find the end of the help command */
- for (start = c_token; !(END_OF_COMMAND); c_token++);
- /* copy new help input into helpbuf */
- if (len > 0)
- helpbuf[len++] = ' '; /* add a space */
- capture(helpbuf + len, start, c_token - 1);
- squash_spaces(helpbuf + base); /* only bother with new stuff */
- lower_case(helpbuf + base); /* only bother with new stuff */
- len = strlen(helpbuf);
-
- /* now, a lone ? will print subtopics only */
- if (strcmp(helpbuf + (base ? base + 1 : 0), "?") == 0) {
- /* subtopics only */
- subtopics = 1;
- only = TRUE;
- helpbuf[base] = '\0'; /* cut off question mark */
- } else {
- /* normal help request */
- subtopics = 0;
- only = FALSE;
- }
-
- switch (help(helpbuf, help_ptr, &subtopics)) {
- case H_FOUND:{
- /* already printed the help info */
- /* subtopics now is true if there were any subtopics */
- screen_ok = FALSE;
-
- do {
- if (subtopics && !only) {
- /* prompt for subtopic with current help string */
- if (len > 0)
- (void) sprintf(prompt, "Subtopic of %s: ", helpbuf);
- else
- (void) strcpy(prompt, "Help topic: ");
- read_line(prompt);
- num_tokens = scanner(input_line);
- c_token = 0;
- more_help = !(END_OF_COMMAND);
- if (more_help)
- /* base for next level is all of current helpbuf */
- do_help();
- } else
- more_help = FALSE;
- } while (more_help);
-
- break;
- }
- case H_NOTFOUND:{
- printf("Sorry, no help for '%s'\n", helpbuf);
- break;
- }
- case H_ERROR:{
- perror(help_ptr);
- break;
- }
- default:{ /* defensive programming */
- int_error("Impossible case in switch", NO_CARET);
- /* NOTREACHED */
- }
- }
-
- helpbuf[base] = '\0'; /* cut it off where we started */
- }
- #endif /* _Windows */
-
- #ifdef AMIGA_AC_5
- char strg0[256];
- #endif
-
- do_system()
- {
- #ifdef AMIGA_AC_5
- char *parms[80];
- void getparms();
-
- getparms(input_line + 1, parms);
- if (fexecv(parms[0], parms) < 0)
- #else
- #if defined(ATARI)&&defined(__GNUC__)
- /* use preloaded shell, if available */
- short (*shell_p) (char *command);
- void *ssp;
-
- ssp = (void *) Super(NULL);
- shell_p = *(short (**) (char *)) 0x4f6;
- Super(ssp);
-
- /* this is a bit strange, but we have to have a single if */
- if ((shell_p ? (*shell_p) (input_line + 1) : system(input_line + 1)))
- #else
- #ifdef _Windows
- if (winsystem(input_line + 1))
- #else
- if (system(input_line + 1))
- #endif
- #endif
- #endif
- os_error("system() failed", NO_CARET);
- }
-
- #ifdef AMIGA_AC_5
-
- /******************************************************************************/
- /* */
- /* Parses the command string (for fexecv use) and converts the first token */
- /* to lower case */
- /* */
- /******************************************************************************/
-
- void
- getparms(command, parms)
- char *command;
- char **parms;
- {
- register int i = 0; /* A bunch of indices */
- register int j = 0;
- register int k = 0;
-
- while (*(command + j) != '\0') { /* Loop on string characters */
- parms[k++] = strg0 + i;
- while (*(command + j) == ' ')
- ++j;
- while (*(command + j) != ' ' && *(command + j) != '\0') {
- if (*(command + j) == '"') /* Get quoted string */
- for (*(strg0 + (i++)) = *(command + (j++));
- *(command + j) != '"';
- *(strg0 + (i++)) = *(command + (j++)));
- *(strg0 + (i++)) = *(command + (j++));
- }
- *(strg0 + (i++)) = '\0';/* NUL terminate every token */
- }
- parms[k] = '\0';
-
- for (k = strlen(strg0) - 1; k >= 0; --k) /* Convert to lower case */
- *(strg0 + k) >= 'A' && *(strg0 + k) <= 'Z' ? *(strg0 + k) |= 32 : *(strg0 + k);
- }
-
- #endif /* AMIGA_AC_5 */
-
- #ifdef READLINE
- char *
- rlgets(s, n, prompt)
- char *s;
- int n;
- char *prompt;
- {
- char *readline();
- static char *line = (char *) NULL;
-
- /* If we already have a line, first free it */
- if (line != (char *) NULL)
- free(line);
-
- line = readline((interactive) ? prompt : "");
-
- /* If it's not an EOF */
- if (line) {
- if (*line)
- add_history(line);
- strncpy(s, line, n);
- return s;
- }
- return line;
- }
- #endif /* READLINE */
-
- #if defined(MSDOS) || defined(_Windows) || defined(DOS386)
-
- #ifndef _Windows
- #ifdef __TURBOC__
- /* cgets implemented using dos functions */
- /* Maurice Castro 22/5/91 */
- char *
- doscgets(s)
- char *s;
- {
- long datseg;
-
- /* protect and preserve segments - call dos to do the dirty work */
- datseg = _DS;
-
- _DX = FP_OFF(s);
- _DS = FP_SEG(s);
- _AH = 0x0A;
- geninterrupt(33);
- _DS = datseg;
-
- /* check for a carriage return and then clobber it with a null */
- if (s[s[1] + 2] == '\r')
- s[s[1] + 2] = 0;
-
- /* return the input string */
- return (&(s[2]));
- }
- #endif /* __TURBOC__ */
- #endif /* !_Windows */
-
- #ifdef __ZTC__
- void cputs(char *s)
- {
- register int i = 0;
- while (s[i] != '\0') bdos(0x02, s[i++], NULL);
- }
- char *cgets(char *s)
- {
- bdosx(0x0A, s, NULL);
-
- if (s[s[1]+2] == '\r')
- s[s[1]+2] = 0;
-
- /* return the input string */
- return(&(s[2]));
- }
- #endif /* __ZTC__ */
-
-
- read_line(prompt)
- char *prompt;
- {
- register int i;
- int start = 0, ilen = 0;
- TBOOLEAN more;
- int last;
- char *p, *crnt_prompt = prompt;
-
- if (interactive) { /* if interactive use console IO so CED will
- * work */
- #ifndef READLINE
- #if defined(_Windows) || defined(__EMX__) || defined(DJGPP) || defined(__ZTC__)
- printf("%s", prompt);
- #else
- cputs(prompt);
- #endif
- #endif /* READLINE */
- do {
- ilen = MAX_LINE_LEN - start - 1;
- input_line[start] = ilen > 126 ? 126 : ilen;
- #ifdef READLINE
- input_line[start + 2] = 0;
- (void) rlgets(&(input_line[start + 2]), ilen, crnt_prompt);
- #ifdef sequent
- if ((p = index(&(input_line[start + 2]), '\r'))!=NULL)
- *p = 0;
- if ((p = index(&(input_line[start + 2]), '\n'))!=NULL)
- *p = 0;
- #else
- if ((p = strchr(&(input_line[start + 2]), '\r'))!=NULL)
- *p = 0;
- if ((p = strchr(&(input_line[start + 2]), '\n'))!=NULL)
- *p = 0;
- #endif
- input_line[start + 1] = strlen(&(input_line[start + 2]));
- #else /* READLINE */
- #if defined(_Windows) || defined(__EMX__) || defined(DJGPP)
- (void) gets(&(input_line[start+2]));
- #else
- #ifdef __TURBOC__
- (void) doscgets(&(input_line[start]));
- #else /* __TURBOC__ */
- (void) cgets(&(input_line[start]));
- #endif /* __TURBOC__ */
- #endif /* _Windows || __EMX__ || DJGPP*/
- (void) putc('\n', stderr);
- #endif /* READLINE */
- if (input_line[start + 2] == 26) {
- /* end-of-file */
- (void) putc('\n', stderr);
- input_line[start] = '\0';
- inline_num++;
- if (start > 0) /* don't quit yet - process what we have */
- more = FALSE;
- else {
- (void) putc('\n', stderr);
- return(1); /* exit gnuplot */
- /* NOTREACHED */
- }
- } else {
- /* normal line input */
- register i = start;
- while ((input_line[i] = input_line[i + 2]) != (char) NULL)
- i++; /* yuck! move everything down two characters */
-
- inline_num++;
- last = strlen(input_line) - 1;
- if (last<0) last=0; /* stop UAE in Windows */
- if (last + 1 >= MAX_LINE_LEN)
- int_error("Input line too long", NO_CARET);
-
- if (input_line[last] == '\\') { /* line continuation */
- start = last;
- more = TRUE;
- } else
- more = FALSE;
- }
- #ifndef READLINE
- if (more)
- #if defined(_Windows) || defined(__EMX__) || defined(DJGPP) || defined(__ZTC__)
- printf("> ");
- #else
- cputs("> ");
- #endif
- #else
- crnt_prompt = "> ";
- #endif /* READLINE */
- } while (more);
- } else { /* not interactive */
- if (interactive)
- fputs(prompt, stderr);
- do {
- /* grab some input */
- if (fgets(&(input_line[start]), MAX_LINE_LEN - start, stdin)
- == (char *) NULL) {
- /* end-of-file */
- if (interactive)
- (void) putc('\n', stderr);
- input_line[start] = '\0';
- inline_num++;
- if (start > 0) /* don't quit yet - process what we have */
- more = FALSE;
- else
- return(1); /* exit gnuplot */
- } else {
- /* normal line input */
- last = strlen(input_line) - 1;
- if (input_line[last] == '\n') { /* remove any newline */
- input_line[last] = '\0';
- /* Watch out that we don't backup beyond 0 (1-1-1) */
- if (last > 0)
- --last;
- inline_num++;
- } else if (last + 1 >= MAX_LINE_LEN)
- int_error("Input line too long", NO_CARET);
-
- if (input_line[last] == '\\') { /* line continuation */
- start = last;
- more = TRUE;
- } else
- more = FALSE;
- }
- if (more && interactive)
- fputs("> ", stderr);
- } while (more);
- }
- return(0);
- }
-
-
- do_shell()
- {
- register char *comspec;
- if ((comspec = getenv("COMSPEC")) == (char *) NULL)
- comspec = "\\command.com";
- #ifdef _Windows
- if (WinExec(comspec, SW_SHOWNORMAL) <= 32)
- #else
- #ifdef DJGPP
- if (system(comspec) == -1)
- #else
- if (spawnl(P_WAIT, comspec, NULL) == -1)
- #endif
- #endif
- os_error("unable to spawn shell", NO_CARET);
- }
-
- #else /* MSDOS */
- /* plain old Unix */
-
- read_line(prompt)
- char *prompt;
- {
- int start = 0;
- TBOOLEAN more = FALSE;
- int last = 0;
-
- #ifndef READLINE
- if (interactive)
- fputs(prompt, stderr);
- #endif /* READLINE */
- do {
- /* grab some input */
- #ifdef READLINE
- if (((interactive)
- ? rlgets(&(input_line[start]), MAX_LINE_LEN - start,
- ((more) ? "> " : prompt))
- : fgets(&(input_line[start]), MAX_LINE_LEN - start, stdin))
- == (char *) NULL) {
- #else
- if (fgets(&(input_line[start]), MAX_LINE_LEN - start, stdin)
- == (char *) NULL) {
- #endif /* READLINE */
- /* end-of-file */
- if (interactive)
- (void) putc('\n', stderr);
- input_line[start] = '\0';
- inline_num++;
- if (start > 0) /* don't quit yet - process what we have */
- more = FALSE;
- else
- return(1); /* exit gnuplot */
- } else {
- /* normal line input */
- last = strlen(input_line) - 1;
- if (input_line[last] == '\n') { /* remove any newline */
- input_line[last] = '\0';
- /* Watch out that we don't backup beyond 0 (1-1-1) */
- if (last > 0)
- --last;
- } else if (last + 1 >= MAX_LINE_LEN)
- int_error("Input line too long", NO_CARET);
-
- if (input_line[last] == '\\') { /* line continuation */
- start = last;
- more = TRUE;
- } else
- more = FALSE;
- }
- #ifndef READLINE
- if (more && interactive)
- fputs("> ", stderr);
- #endif
- } while (more);
- return(0);
- }
-
- #ifdef VFORK
-
- do_shell()
- {
- register char *shell;
- register int p;
- static int execstat;
- if (!(shell = getenv("SHELL")))
- shell = SHELL;
- #ifdef AMIGA_AC_5
- execstat = fexecl(shell, shell, NULL);
- #else
- if ((p = vfork()) == 0) {
- execstat = execl(shell, shell, NULL);
- _exit(1);
- } else if (p == -1)
- os_error("vfork failed", c_token);
- else
- while (wait(NULL) != p)
- #endif
- ;
- if (execstat == -1)
- os_error("shell exec failed", c_token);
- (void) putc('\n', stderr);
- }
- #else /* VFORK */
-
- #ifdef AMIGA_SC_6_1
- do_shell()
- {
- register char *shell;
- if (!(shell = getenv("SHELL")))
- shell = SHELL;
-
- if (system(shell))
- os_error("system() failed", NO_CARET);
-
- (void) putc('\n', stderr);
- }
- #else /* AMIGA_SC_6_1 */
- #ifdef OS2
- do_shell()
- {
- register char *shell;
- if (!(shell = getenv("COMSPEC")))
- shell = SHELL;
-
- if (system(shell) == -1 )
- os_error("system() failed", NO_CARET);
-
- (void) putc('\n', stderr);
- }
- #else /* ! OS2 */
- #define EXEC "exec "
- do_shell()
- {
- static char exec[100] = EXEC;
- register char *shell;
- if (!(shell = getenv("SHELL")))
- shell = SHELL;
-
- if (system(strncpy(&exec[sizeof(EXEC) - 1], shell,
- sizeof(exec) - sizeof(EXEC) - 1)))
- os_error("system() failed", NO_CARET);
-
- (void) putc('\n', stderr);
- }
- #endif /* OS2 */
- #endif /* AMIGA_SC_6_1 */
- #endif /* VFORK */
- #endif /* MSDOS */
- #endif /* vms */
-
- #ifdef _Windows
- /* there is a system like call on MS Windows but it is a bit difficult to
- use, so we will invoke the command interpreter and use it to execute the
- commands */
- int winsystem(s)
- char *s;
- {
- LPSTR comspec;
- LPSTR execstr;
- LPSTR p;
-
- /* get COMSPEC environment variable */
- #ifdef WIN32
- char envbuf[81];
- GetEnvironmentVariable("COMSPEC", envbuf, 80);
- if (*envbuf == '\0')
- comspec = "\\command.com";
- else
- comspec = envbuf;
- #else
- p = GetDOSEnvironment();
- comspec = "\\command.com";
- while (*p) {
- if (!strncmp(p,"COMSPEC=",8)) {
- comspec=p+8;
- break;
- }
- p+=strlen(p)+1;
- }
- #endif
- /* if the command is blank we must use command.com */
- p = s;
- while ((*p == ' ') || (*p == '\n') || (*p == '\r'))
- p++;
- if (*p == '\0')
- {
- WinExec(comspec, SW_SHOWNORMAL);
- }
- else
- {
- /* attempt to run the windows/dos program via windows */
- if (WinExec(s, SW_SHOWNORMAL) <= 32)
- {
- /* attempt to run it as a dos program from command line */
- execstr = (char *) malloc(strlen(s) + strlen(comspec) + 6);
- strcpy(execstr, comspec);
- strcat(execstr, " /c ");
- strcat(execstr, s);
- WinExec(execstr, SW_SHOWNORMAL);
- free(execstr);
- }
- }
-
- /* regardless of the reality return OK - the consequences of */
- /* failure include shutting down Windows */
- return(0); /* success */
- }
- #endif
-