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- /* GNUPLOT - misc.c */
- /*
- * Copyright (C) 1986, 1987, 1990 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.
- *
- * send your comments or suggestions to (pixar!info-gnuplot@sun.com).
- *
- */
-
- #include <stdio.h>
- #include <math.h>
- #include "plot.h"
- #include "setshow.h"
- #include "help.h"
- #ifdef __TURBOC__
- #include <graphics.h>
- #endif
-
- #ifndef _IBMR2
- extern char *malloc();
- #endif
-
- extern int c_token;
- extern char replot_line[];
- extern struct at_type at;
- extern struct ft_entry ft[];
- extern struct udft_entry *first_udf;
- extern struct udvt_entry *first_udv;
-
- extern struct at_type *temp_at();
-
- extern BOOLEAN interactive;
- extern char *infile_name;
- extern int inline_num;
-
- /* State information for load_file(), to recover from errors
- * and properly handle recursive load_file calls
- */
- typedef struct lf_state_struct LFS;
- struct lf_state_struct {
- FILE *fp; /* file pointer for load file */
- char *name; /* name of file */
- BOOLEAN interactive; /* value of interactive flag on entry */
- int inline_num; /* inline_num on entry */
- LFS *prev; /* defines a stack */
- } *lf_head = NULL; /* NULL if not in load_file */
-
- static BOOLEAN lf_pop();
- static void lf_push();
-
- /*
- * instead of <strings.h>
- */
- extern int strcmp();
-
-
- /*
- * cp_free() releases any memory which was previously malloc()'d to hold
- * curve points.
- */
- cp_free(cp)
- struct curve_points *cp;
- {
- if (cp) {
- cp_free(cp->next_cp);
- if (cp->title)
- free((char *)cp->title);
- free((char *)cp);
- }
- }
-
-
-
- save_functions(fp)
- FILE *fp;
- {
- register struct udft_entry *udf = first_udf;
-
- if (fp) {
- while (udf) {
- if (udf->definition)
- fprintf(fp,"%s\n",udf->definition);
- udf = udf->next_udf;
- }
- (void) fclose(fp);
- } else
- os_error("Cannot open save file",c_token);
- }
-
-
- save_variables(fp)
- FILE *fp;
- {
- register struct udvt_entry *udv = first_udv->next_udv; /* skip pi */
-
- if (fp) {
- while (udv) {
- if (!udv->udv_undef) {
- fprintf(fp,"%s = ",udv->udv_name);
- disp_value(fp,&(udv->udv_value));
- (void) putc('\n',fp);
- }
- udv = udv->next_udv;
- }
- (void) fclose(fp);
- } else
- os_error("Cannot open save file",c_token);
- }
-
-
- save_all(fp)
- FILE *fp;
- {
- register struct udft_entry *udf = first_udf;
- register struct udvt_entry *udv = first_udv->next_udv; /* skip pi */
-
- if (fp) {
- save_set_all(fp);
- while (udf) {
- if (udf->definition)
- fprintf(fp,"%s\n",udf->definition);
- udf = udf->next_udf;
- }
- while (udv) {
- if (!udv->udv_undef) {
- fprintf(fp,"%s = ",udv->udv_name);
- disp_value(fp,&(udv->udv_value));
- (void) putc('\n',fp);
- }
- udv = udv->next_udv;
- }
- fprintf(fp,"%s\n",replot_line);
- (void) fclose(fp);
- } else
- os_error("Cannot open save file",c_token);
- }
-
-
- save_set(fp)
- FILE *fp;
- {
- if (fp) {
- save_set_all(fp);
- (void) fclose(fp);
- } else
- os_error("Cannot open save file",c_token);
- }
-
-
- save_set_all(fp)
- FILE *fp;
- {
- struct text_label *this_label;
- struct arrow_def *this_arrow;
- fprintf(fp,"set terminal %s\n", term_tbl[term].name);
- fprintf(fp,"set output %s\n",strcmp(outstr,"STDOUT")? outstr : "" );
- fprintf(fp,"set %sclip points\n", (clip_points)? "" : "no");
- fprintf(fp,"set %sclip one\n", (clip_lines1)? "" : "no");
- fprintf(fp,"set %sclip two\n", (clip_lines2)? "" : "no");
- fprintf(fp,"set dummy %s\n",dummy_var);
- fprintf(fp,"set format x \"%s\"\n", xformat);
- fprintf(fp,"set format y \"%s\"\n", yformat);
- fprintf(fp,"set %sgrid\n", (grid)? "" : "no");
- switch (key) {
- case -1 :
- fprintf(fp,"set key\n");
- break;
- case 0 :
- fprintf(fp,"set nokey\n");
- break;
- case 1 :
- fprintf(fp,"set key %g,%g\n",key_x,key_y);
- break;
- }
- fprintf(fp,"set nolabel\n");
- for (this_label = first_label; this_label != NULL;
- this_label = this_label->next) {
- fprintf(fp,"set label %d \"%s\" at %g,%g ",
- this_label->tag,
- this_label->text, this_label->x, this_label->y);
- switch(this_label->pos) {
- case LEFT :
- fprintf(fp,"left");
- break;
- case CENTRE :
- fprintf(fp,"centre");
- break;
- case RIGHT :
- fprintf(fp,"right");
- break;
- }
- fputc('\n',fp);
- }
- fprintf(fp,"set noarrow\n");
- for (this_arrow = first_arrow; this_arrow != NULL;
- this_arrow = this_arrow->next) {
- fprintf(fp,"set arrow %d from %g,%g to %g,%g\n",
- this_arrow->tag,
- this_arrow->sx, this_arrow->sy,
- this_arrow->ex, this_arrow->ey);
- }
- if ((!log_x)||(!log_y))
- fprintf(fp,"set nologscale xy\n");
- if (log_x||log_y)
- fprintf(fp,"set logscale %c%c\n",
- log_x ? 'x' : ' ', log_y ? 'y' : ' ');
- fprintf(fp,"set offsets %g, %g, %g, %g\n",loff,roff,toff,boff);
- fprintf(fp,"set %spolar\n", (polar)? "" : "no");
- fprintf(fp,"set %sparametric\n", (parametric)? "" : "no");
- fprintf(fp,"set samples %d\n",samples);
- fprintf(fp,"set size %g,%g\n",xsize,ysize);
- fprintf(fp,"set data style ");
- switch (data_style) {
- case LINES: fprintf(fp,"lines\n"); break;
- case POINTS: fprintf(fp,"points\n"); break;
- case IMPULSES: fprintf(fp,"impulses\n"); break;
- case LINESPOINTS: fprintf(fp,"linespoints\n"); break;
- case DOTS: fprintf(fp,"dots\n"); break;
- }
- fprintf(fp,"set function style ");
- switch (func_style) {
- case LINES: fprintf(fp,"lines\n"); break;
- case POINTS: fprintf(fp,"points\n"); break;
- case IMPULSES: fprintf(fp,"impulses\n"); break;
- case LINESPOINTS: fprintf(fp,"linespoints\n"); break;
- case DOTS: fprintf(fp,"dots\n"); break;
- }
- fprintf(fp,"set tics %s\n", (tic_in)? "in" : "out");
- save_tics(fp, xtics, 'x', &xticdef);
- save_tics(fp, ytics, 'y', &yticdef);
- fprintf(fp,"set title \"%s\"\n",title);
- fprintf(fp,"set trange [%g : %g]\n",tmin,tmax);
- fprintf(fp,"set xlabel \"%s\"\n",xlabel);
- fprintf(fp,"set xrange [%g : %g]\n",xmin,xmax);
- fprintf(fp,"set ylabel \"%s\"\n",ylabel);
- fprintf(fp,"set yrange [%g : %g]\n",ymin,ymax);
- fprintf(fp,"set %s %c\n",
- autoscale_t ? "autoscale" : "noautoscale", 't');
- fprintf(fp,"set %s %c%c\n",
- (autoscale_y||autoscale_x) ? "autoscale" : "noautoscale",
- autoscale_x ? 'x' : ' ', autoscale_y ? 'y' : ' ');
- fprintf(fp,"set zero %g\n",zero);
- }
-
- save_tics(fp, onoff, axis, tdef)
- FILE *fp;
- BOOLEAN onoff;
- char axis;
- struct ticdef *tdef;
- {
- if (onoff) {
- fprintf(fp,"set %ctics", axis);
- switch(tdef->type) {
- case TIC_COMPUTED: {
- break;
- }
- case TIC_SERIES: {
- fprintf(fp, " %g,%g,%g", tdef->def.series.start,
- tdef->def.series.incr, tdef->def.series.end);
- break;
- }
- case TIC_USER: {
- register struct ticmark *t;
- fprintf(fp, " (");
- for (t = tdef->def.user; t != NULL; t=t->next) {
- if (t->label)
- fprintf(fp, "\"%s\" ", t->label);
- if (t->next)
- fprintf(fp, "%g, ", t->position);
- else
- fprintf(fp, "%g", t->position);
- }
- fprintf(fp, ")");
- break;
- }
- }
- fprintf(fp, "\n");
- } else {
- fprintf(fp,"set no%ctics\n", axis);
- }
- }
-
- load_file(fp, name)
- FILE *fp;
- char *name;
- {
- register int len;
- extern char input_line[];
-
- int start, left;
- int more;
- int stop = FALSE;
-
- lf_push(fp); /* save state for errors and recursion */
-
- if (fp == (FILE *)NULL) {
- char errbuf[BUFSIZ];
- (void) sprintf(errbuf, "Cannot open load file '%s'", name);
- os_error(errbuf, c_token);
- } else {
- /* go into non-interactive mode during load */
- /* will be undone below, or in load_file_error */
- interactive = FALSE;
- inline_num = 0;
- infile_name = name;
-
- while (!stop) { /* read all commands in file */
- /* read one command */
- left = MAX_LINE_LEN;
- start = 0;
- more = TRUE;
-
- while (more) {
- if (fgets(&(input_line[start]), left, fp) == NULL) {
- stop = TRUE; /* EOF in file */
- input_line[start] = '\0';
- more = FALSE;
- } else {
- inline_num++;
- len = strlen(input_line) - 1;
- if (input_line[len] == '\n') { /* remove any newline */
- input_line[len] = '\0';
- /* Look, len was 1-1 = 0 before, take care here! */
- if (len > 0) --len;
- } else if (len+1 >= left)
- int_error("Input line too long",NO_CARET);
-
- if (input_line[len] == '\\') { /* line continuation */
- start = len;
- left = MAX_LINE_LEN - start; /* left -=len;*/
- } else
- more = FALSE;
- }
- }
-
- if (strlen(input_line) > 0) {
- screen_ok = FALSE; /* make sure command line is
- echoed on error */
- do_line();
- }
- }
- }
-
- /* pop state */
- (void) lf_pop(); /* also closes file fp */
- }
-
- /* pop from load_file state stack */
- static BOOLEAN /* FALSE if stack was empty */
- lf_pop() /* called by load_file and load_file_error */
- {
- LFS *lf;
-
- if (lf_head == NULL)
- return(FALSE);
- else {
- lf = lf_head;
- if (lf->fp != (FILE *)NULL)
- (void) fclose(lf->fp);
- interactive = lf->interactive;
- inline_num = lf->inline_num;
- infile_name = lf->name;
- lf_head = lf->prev;
- free((char *)lf);
- return(TRUE);
- }
- }
-
- /* push onto load_file state stack */
- /* essentially, we save information needed to undo the load_file changes */
- static void
- lf_push(fp) /* called by load_file */
- FILE *fp;
- {
- LFS *lf;
-
- lf = (LFS *)alloc(sizeof(LFS), (char *)NULL);
- if (lf == (LFS *)NULL) {
- if (fp != (FILE *)NULL)
- (void) fclose(fp); /* it won't be otherwise */
- int_error("not enough memory to load file", c_token);
- }
-
- lf->fp = fp; /* save this file pointer */
- lf->name = infile_name; /* save current name */
- lf->interactive = interactive; /* save current state */
- lf->inline_num = inline_num; /* save current line number */
- lf->prev = lf_head; /* link to stack */
- lf_head = lf;
- }
-
- load_file_error() /* called from main */
- {
- /* clean up from error in load_file */
- /* pop off everything on stack */
- while(lf_pop())
- ;
- }
-
- /* find char c in string str; return p such that str[p]==c;
- * if c not in str then p=strlen(str)
- */
- int
- instring(str, c)
- char *str;
- char c;
- {
- int pos = 0;
-
- while (str != NULL && *str != '\0' && c != *str) {
- str++;
- pos++;
- }
- return (pos);
- }
-
- show_functions()
- {
- register struct udft_entry *udf = first_udf;
-
- fprintf(stderr,"\n\tUser-Defined Functions:\n");
-
- while (udf) {
- if (udf->definition)
- fprintf(stderr,"\t%s\n",udf->definition);
- else
- fprintf(stderr,"\t%s is undefined\n",udf->udf_name);
- udf = udf->next_udf;
- }
- }
-
-
- show_at()
- {
- (void) putc('\n',stderr);
- disp_at(temp_at(),0);
- }
-
-
- disp_at(curr_at, level)
- struct at_type *curr_at;
- int level;
- {
- register int i, j;
- register union argument *arg;
-
- for (i = 0; i < curr_at->a_count; i++) {
- (void) putc('\t',stderr);
- for (j = 0; j < level; j++)
- (void) putc(' ',stderr); /* indent */
-
- /* print name of instruction */
-
- fputs(ft[(int)(curr_at->actions[i].index)].f_name,stderr);
- arg = &(curr_at->actions[i].arg);
-
- /* now print optional argument */
-
- switch(curr_at->actions[i].index) {
- case PUSH: fprintf(stderr," %s\n", arg->udv_arg->udv_name);
- break;
- case PUSHC: (void) putc(' ',stderr);
- disp_value(stderr,&(arg->v_arg));
- (void) putc('\n',stderr);
- break;
- case PUSHD: fprintf(stderr," %s dummy\n",
- arg->udf_arg->udf_name);
- break;
- case CALL: fprintf(stderr," %s", arg->udf_arg->udf_name);
- if (arg->udf_arg->at) {
- (void) putc('\n',stderr);
- disp_at(arg->udf_arg->at,level+2); /* recurse! */
- } else
- fputs(" (undefined)\n",stderr);
- break;
- case JUMP:
- case JUMPZ:
- case JUMPNZ:
- case JTERN:
- fprintf(stderr," +%d\n",arg->j_arg);
- break;
- default:
- (void) putc('\n',stderr);
- }
- }
- }
-
-
- /* alloc:
- * allocate memory
- * This is a protected version of malloc. It causes an int_error
- * if there is not enough memory, but first it tries FreeHelp()
- * to make some room, and tries again. If message is NULL, we
- * allow NULL return. Otherwise, we handle the error, using the
- * message to create the int_error string.
- */
-
- char *
- alloc(size, message)
- unsigned int size; /* # of bytes */
- char *message; /* description of what is being allocated */
- {
- char *p; /* the new allocation */
- char errbuf[100]; /* error message string */
-
- p = malloc(size);
- if (p == (char *)NULL) {
- #ifndef VMS
- FreeHelp(); /* out of memory, try to make some room */
- #endif
-
- p = malloc(size); /* try again */
- if (p == (char *)NULL) {
- /* really out of memory */
- if (message != NULL) {
- (void) sprintf(errbuf, "out of memory for %s", message);
- int_error(errbuf, NO_CARET);
- /* NOTREACHED */
- }
- /* else we return NULL */
- }
- }
-
- return(p);
- }