--- /dev/null
+/*
+ * c2gnuplot.h
+ *
+ * Copyright 2007 Zoltan Kuscsik <kuscsik@gmail.com>
+ *
+ * This file is GPLv2 as found in COPYING.
+ */
+
+
+/*
+ @fille c2gnuplo.h
+ @author Z. Kuscsik
+ @date jan 2007
+ @version $Revision: 0.2 $
+ @brief C interface to gnuplot.
+
+ gnuplot is a freely available, command-driven graphical display tool for
+ Unix. It compiles and works quite well on a number of Unix flavours as
+ well as other operating systems. The following module enables sending
+ display requests to gnuplot through simple C calls.
+ This code is partially based on the gnuplot_i.h library:
+ http://ndevilla.free.fr/gnuplot/
+
+--------------------------------------------------------------------------*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <string>
+#include <stdarg.h>
+#include <map>
+//#include "operations.h"
+
+using namespace std;
+
+#define GNPL_COMM_SIZE 2000
+#define MAX_COMM_NAME_LENGTH 100
+#define MAX_PATH_NAME_LENGTH 1000
+#define tmp_name "/tmp/tmpdataXXXXXXX"
+unsigned int FIRST_INIT = 1;
+
+char command_list[][MAX_COMM_NAME_LENGTH] = {"gnuplot","ppmto4ym","mpeg2enc"};
+
+#define NUMBER_OF_EXTERNAL_COMMANDS (sizeof command_list)/MAX_COMM_NAME_LENGTH //number of external commands
+
+map<char,char> path_list;
+
+
+
+
+class gnuplot_window{
+ public:
+ gnuplot_window();
+ void splot_data(); //plot 3d data file
+ void splot_data(char * cmd, ...);
+ void plot_data(); //plot 2d data file
+ void plot_data(char * cmd, ...);
+ void flush(); //flush gnuplot data
+ void data(char * cmd, ...); //write data to gnuplot session
+ void command(char * cmd, ...); //set gnuplot variables and draw functions
+ void mpeg_out(char * cmd, ...);
+ char* fit_range;
+ char* fit_function;
+ void fit(char * cmd, ...);
+ float get_variable(char * cmd, ...);
+ private:
+ FILE *pipe;
+ FILE *input_param;
+ FILE *input;
+ char gnuplot_fifo[(sizeof tmp_name)];
+ char gnuplot_output_fifo[(sizeof tmp_name)];
+ };
+
+
+
+char * get_program_path(char * pname)
+{
+ int i, j, lg;
+ char * path;
+ static char buf[MAX_PATH_NAME_LENGTH];
+
+ /* Trivial case: try in CWD */
+ sprintf(buf, "./%s", pname) ;
+ if (access(buf, X_OK)==0) {
+ sprintf(buf, ".");
+ return buf ;
+ }
+ /* Try out in all paths given in the PATH variable */
+ buf[0] = 0;
+ path = getenv("PATH") ;
+ if (path!=NULL) {
+ for (i=0; path[i]; ) {
+ for (j=i ; (path[j]) && (path[j]!=':') ; j++);
+ lg = j - i;
+ strncpy(buf, path + i, lg);
+ if (lg == 0) buf[lg++] = '.';
+ buf[lg++] = '/';
+ strcpy(buf + lg, pname);
+ if (access(buf, X_OK) == 0) {
+ /* Found it! */
+ break ;
+ }
+ buf[0] = 0;
+ i = j;
+ if (path[i] == ':') i++ ;
+ }
+ } else {
+ fprintf(stderr, "PATH variable not set\n");
+ }
+ /* If the buffer is still empty, the command was not found */
+ if (buf[0] == 0) return NULL ;
+ /* Otherwise truncate the command name to yield path only */
+ lg = strlen(buf) - 1 ;
+ while (buf[lg]!='/') {
+ buf[lg]=0 ;
+ lg -- ;
+ }
+ buf[lg] = 0;
+ return buf ;
+}
+
+
+
+void gnuplot_window::mpeg_out(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+ strcat(local_cmd, "\n");
+ command("set term pbm color ");
+ command("set output '| ppmtoy4m -S 420mpeg2 | mpeg2enc -o %s",local_cmd);
+ fit_range="[*:*]";
+ fit_function="";
+
+}
+
+void gnuplot_window::data(char * cmd, ...)
+{
+
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+
+ if(FIRST_INIT)
+ {
+ FIRST_INIT=0;
+ }
+
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ strcat(local_cmd, "\n");
+ fputs(local_cmd, input);
+ fflush(input);
+}
+
+
+void gnuplot_window::command(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ strcat(local_cmd, "\n");
+
+fprintf(pipe,local_cmd);
+fflush(pipe);
+}
+
+void gnuplot_window::plot_data()
+{
+fprintf(pipe,"plot '%s'\n",gnuplot_fifo);
+fflush(pipe);
+input = fopen(gnuplot_fifo,"w");
+}
+
+void gnuplot_window::splot_data()
+{
+fprintf(pipe,"splot '%s'\n",gnuplot_fifo);
+fflush(pipe);
+input = fopen(gnuplot_fifo,"w");
+}
+
+void gnuplot_window::splot_data(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ strcat(local_cmd, "\n");
+
+
+fprintf(pipe,"splot '%s' %s\n",gnuplot_fifo,local_cmd);
+fflush(pipe);
+input = fopen(gnuplot_fifo,"w");
+}
+void gnuplot_window::plot_data(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ strcat(local_cmd, "\n");
+
+
+fprintf(pipe,"plot '%s' %s\n",gnuplot_fifo,local_cmd);
+fflush(pipe);
+input = fopen(gnuplot_fifo,"w");
+}
+
+/*
+ * Fit function
+ *
+ */
+
+void gnuplot_window::fit(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ strcat(local_cmd, "\n");
+
+ if(fit_function=="")
+ fprintf(stderr,"Function for datafit is not defined. Please define the fit_function parameter\n");
+
+ fprintf(pipe,"fit [%s] %s '%s' %s\n",fit_range, fit_function,gnuplot_fifo,local_cmd);
+ fflush(pipe);
+ input = fopen(gnuplot_fifo,"w");
+
+
+
+
+}
+
+void gnuplot_window::flush()
+{
+fclose(input);
+fflush(pipe);
+}
+
+
+gnuplot_window::gnuplot_window()
+{
+ int fd;
+ pipe=popen("/usr/bin/gnuplot 2>/dev/null","w");
+ setvbuf(pipe, NULL, _IONBF, 0 );
+
+ strcpy(gnuplot_fifo,tmp_name);
+ strcpy(gnuplot_output_fifo,tmp_name);
+ if((fd=mkstemp(gnuplot_fifo) ) < 0) { fprintf(stderr,"Creating temporary filename failed\n"); exit(0);}
+ close(fd); remove(gnuplot_fifo);
+
+ if (mkfifo(gnuplot_fifo, S_IRUSR | S_IWUSR ) != 0) {fprintf(stderr,"Make fifo file %s failed\n",gnuplot_fifo); exit(0);}
+
+
+ if((fd=mkstemp(gnuplot_output_fifo) ) < 0) { fprintf(stderr,"Creating temporary filename failed\n"); exit(0);}
+ close(fd); remove(gnuplot_output_fifo);
+
+ if (mkfifo(gnuplot_output_fifo, S_IRUSR | S_IWUSR ) != 0) {fprintf(stderr,"Make fifo file %s failed\n",gnuplot_output_fifo); exit(0);}
+
+ fflush(pipe);
+ command("set fit logfile '/dev/null'");
+
+}
+
+float gnuplot_window::get_variable(char * cmd, ...)
+{
+ va_list ap ;
+ char local_cmd[GNPL_COMM_SIZE];
+ va_start(ap, cmd);
+ vsprintf(local_cmd, cmd, ap);
+ va_end(ap);
+
+ float param;
+ command("set print '%s'",gnuplot_output_fifo);
+
+ command("print %s",local_cmd);
+
+ usleep(10000); /* There must be a little sleep because of asynchronous relation to the gnuplot pipe*/
+
+ input_param=fopen(gnuplot_output_fifo,"r");
+
+ fscanf(input_param,"%f",¶m);
+
+ fclose(input_param);
+
+ return param;
+}
+
projects / eurobot / public.git / commitdiff