qwerty

#include "gplot.h"

int check_x_display(){
	char *disp;
	disp = getenv("DISPLAY");
	if (disp == NULL){
		fprintf(stderr, "nu exista x server");
		return 1;
	}
	else return 0;
}

gplot_ctrl *gplot_init(){
	if(check_x_display()) return NULL;
	gplot_ctrl *handler;
	handler = (gplot_ctrl*) malloc (sizeof(gplot_ctrl));
	gplot_setstyle(handler, "points");
	handler -> gpcmd = popen("gnuplot", "w");
	if (handler -> gpcmd != NULL) return handler;
	else {
		free(handler);
		fprintf(stderr, "nu s-a conectat");
		return NULL;
	}
}

void gplot_close(gplot_ctrl *handle){
	if (pclose(handler -> gpcmd) == -1){
		fprintf(stderr,"conexiunea s-a intrerupt");
		return;
	}
	else{
		free(handler);
		handler = NULL;
		return;
	}
}

void gplot_setstyle(gplot_ctrl *handle, char *plot_style){
	if(strcmp(plot_style, "lines") &&
	strcmp(plot_style, "points") &&
	strcmp(plot_style, "linespoints") &&
	strcmp(plot_style, "inpulses") &&
	strcmp(plot_style, "dots") &&
	strcmp(plot_style, "steps") &&
	strcmp(plot_style, "errorbars") &&
	strcmp(plot_style, "boxes") &&
	strcmp(plot_style, "boxerrorbars")){
		fprintf(stderr, "stil de reprezentare grafic necunoscut; setare stil points");
		strcpy(handler -> pstyle, "points");
	}
	else{
		strcpy(handler -> pstyle, plot_style);
	}

}

void gplot_set_xlabel(gplot_ctrl *handle, char *label){
	char cmd[CP_CMD_SIZE];
	cmd = sprintf(cmd,"set xlabel \"%s\"", label);
	gplot_cmd(handler, cmd);
}

void gplot_set_ylabel(gplot_ctrl *handle, char *label){
	char cmd[CP_CMD_SIZE];
	cmd = sprintf(cmd,"set ylabel \"%s\"", label);
	gplot_cmd(handler, cmd);
}

void gplot_cmd(gplot_ctrl *handle, char cmd*,...){
	va_list ap;
	char local_cmd[GP_CMD_SIZE];
	va_start(ap, cmd);
	vsprintf(local_cmd, cmd, ap);
	va_end(ap);
	strcat(local_cmd, "\n");
	fputs(local_cmd, handle -> gpcmd);
	fflush(handler->gpcmd);
	return;
}