--- /dev/null
+version 0.5: 8 July 2008, first public release
+
+Was getting strange error messages out of (I thought) strtod(). Turns out
+some Xlib functions were setting errno for reasons I don't understand. I put
+in a HACK to ignore errnos set by functions other than strtod, which seems to
+get things back in working order.
+
--- /dev/null
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+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+PROG_NAME = stripchart
+VERSION = 0.5
+SOURCE_FILES = strip.c stripchart.c stripchart.h err_mac.h
+OTHER_FILES = README CHANGELOG LICENSE Makefile test.sh test.dat
+DIST_FILES = $(SOURCE_FILES) $(OTHER_FILES)
+DIST_DIR = $(PROG_NAME)-$(VERSION)
+DIST_NAME = $(PROG_NAME)-$(VERSION).tar.gz
+GENERATED_FILES = $(PROG_NAME) $(PROG_NAME:%=%.exe) $(PROG_NAME:%=%.o)
+INSTALL_DIR = $(HOME)/bin
+
+LIB_DIRS = /usr/X11R6/lib/
+PLOT_LIBS = X11 m # plot Xaw Xmu Xt SM ICE Xext X11 m
+PTHREAD_LIBS = pthread
+MY_FLAGS = -g $(INCLUDES:%=-I %) -D 'VERSION="$(VERSION)"'
+
+all : $(PROG_NAME)
+
+clean :
+ rm -f $(GENERATED_FILES)
+
+install : $(PROG_NAME)
+ cp $(PROG_NAME) $(INSTALL_DIR)/$(PROG_NAME)
+
+dist :
+ mkdir $(DIST_DIR)
+ cp $(DIST_FILES) $(DIST_DIR)
+ tar -chozf $(DIST_NAME) $(DIST_DIR)
+ rm -rf $(DIST_DIR)
+
+check : $(PROG_NAME)
+ test.sh
+
+stripchart.o : stripchart.c stripchart.h err_mac.h
+ gcc $(MY_FLAGS) -c $<
+
+$(PROG_NAME) : strip.c stripchart.o
+ gcc $(MY_FLAGS) $(LIB_DIRS:%=-L %) \
+ -o $@ $^ $(PLOT_LIBS:%=-l%) $(PTHREAD_LIBS:%=-l%)
--- /dev/null
+For all those times you wanted a quick & dirty way to watch your data come in.
+This is indeed ugly, but hopefully fast, and so not particularly configurable.
+
+stripchart creates a FIFO, pops up an X window, and waits for input.
+ASCII numbers delimited with endlines ('\n') are plotted in the window,
+until an unparsable number is recieved,
+at which point, the window closes and stripchart returns.
+
+See test.sh for an example.
+
+stripchart.c implements the stripchart.
+stripchart.h provides an interface to the stripchart defined in stripchart.c.
+strip.c uses the stripchart.[hc] to plot data it reads in from a named pipe.
+
+Trevor King
+8 July, 2008
+wking@drexel.edu
--- /dev/null
+/* need to include STDIO.H for FPRINTF() */
+
+#define SUCCESS 0
+#define FAILURE 1
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+static int err_mac_ans;
+
+/*
+ * For functions returning int, when you want an immediate return.
+ */
+
+/* CHK() fails if (a != SUCCESS) */
+#define CHK(a) \
+ do { \
+ if( (err_mac_ans = (a)) != SUCCESS ) { \
+ fprintf(stderr,"FAILURE: %s.%d. (%s) returned %d\n",__FILE__,__LINE__, #a, err_mac_ans); \
+ fflush(stderr); \
+ return err_mac_ans; \
+ } \
+ } while (0)
+
+/* AST() fails if (a != 0) */
+#define AST(a) \
+ do { \
+ if( (err_mac_ans = (a)) == FALSE ) { \
+ fprintf(stderr, "ASSERT FAILED: %s.%d (%s) returned %d\n",__FILE__,__LINE__, #a, err_mac_ans); \
+ fflush(stderr); \
+ return FAILURE; \
+ } \
+ } while(0)
+
+/* like AST(), but return E_CODE instead of the default FAILURE */
+#define E_AST(a,e_code) \
+ do { \
+ if((a) == FALSE) { \
+ fprintf(stderr,"ASSERT FAILED: %s.%d (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ return (e_code); \
+ } \
+ } while(0)
+
+/* like E_AST(), but also fprintfs __VA_ARGS__ */
+#define M_AST(a,e_code,...) \
+ do { \
+ if((a) == FALSE) { \
+ fprintf(stderr,"ASSERT FAILED: %s.%d (%s) ",__FILE__,__LINE__, #a); \
+ fprintf(stderr, __VA_ARGS__); \
+ fflush(stderr); \
+ return (e_code); \
+ } \
+ } while(0)
+
+/* print a message and return E_CODE */
+#define M_EXIT(e_code, ... ) \
+ do { \
+ fprintf(stderr,"EXIT: %s.%d ",__FILE__,__LINE__); \
+ fprintf(stderr, __VA_ARGS__ ); \
+ fflush(stderr); \
+ return (e_code); \
+ } while(0)
+
+/*
+ * When you don't want an immedate return, but would rather 'goto Error;'.
+ * These set the local variable RC with the return value before jumping.
+ */
+
+#define G_CHK(a) \
+ do { \
+ if( (rc = (a)) != SUCCESS ) { \
+ fprintf(stderr,"FAILURE: %s.%d. (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ goto Error; \
+ } \
+ } while (0)
+
+#define G_AST(a) \
+ do { \
+ if( (rc = (a)) == FALSE ) { \
+ fprintf(stderr, "ASSERT FAILED: %s.%d (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ goto Error; \
+ } \
+ } while(0)
+
+#define G_E_AST(a,e_code) \
+ do { \
+ if((a) == FALSE) { \
+ fprintf(stderr,"ASSERT FAILED: %s.%d (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ rc = e_code; \
+ goto Error; \
+ } \
+ } while(0)
+
+#define G_M_AST(a,e_code,...) \
+ do { \
+ if((a) == FALSE) { \
+ fprintf(stderr,"ASSERT FAILED: %s.%d (%s) ",__FILE__,__LINE__, #a); \
+ fprintf(stderr, __VA_ARGS__); \
+ fflush(stderr); \
+ rc = e_code; \
+ goto Error; \
+ } \
+ } while(0)
+
+/* print a message and return E_CODE */
+#define G_M_EXIT(e_code, ... ) \
+ do { \
+ fprintf(stderr,"EXIT: %s.%d ",__FILE__,__LINE__); \
+ fprintf(stderr, __VA_ARGS__ ); \
+ fflush(stderr); \
+ rc = e_code; \
+ goto Error; \
+ } while(0)
+
+/*
+ * And when you only want to print a message
+ */
+#define P_CHK(a) \
+ do { \
+ if( (a) != SUCCESS ) { \
+ fprintf(stderr,"FAILURE: %s.%d. (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ } \
+ } while (0)
+
+/* AST() fails if (a != 0) */
+#define P_AST(a) \
+ do { \
+ if( (a) == FALSE ) { \
+ fprintf(stderr, "ASSERT FAILED: %s.%d (%s)\n",__FILE__,__LINE__, #a); \
+ fflush(stderr); \
+ } \
+ } while(0)
--- /dev/null
+/*
+ strip - program for stripcharting ASCII data read from a named pipe.
+ Copyright (C) 2008, William Trevor King
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+
+ The author may be contacted at <wking@drexel.edu> on the Internet, or
+ write to Trevor King, Drexel University, Physics Dept., 3141 Chestnut St.,
+ Philadelphia PA 19104, USA.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/stat.h> /* mkfifo(), S_IRUSR, S_IWUSR */
+#include "err_mac.h"
+#include "stripchart.h"
+
+#define BUFSZ 81
+
+//#define AUTOGEN /* for testing */
+
+
+static int string2double(char *string, double *pDouble);
+static int getargs(int argc, char **argv, unsigned int *pFlags,
+ char **pTitle, char **pGeometry, char **pPipe_name,
+ double *pY_max, double *pY_min, int *pPoints_shown_at_once);
+static int open_pipe(char *name, unsigned int flags, FILE **pInStream);
+static int close_pipe(char *name, FILE **pInStream);
+static int get_num(FILE *stream, double *px);
+
+static const char options[] = "t:g:p:cuM:m:n:avh";
+static const char *func_name = NULL;
+static const char *description =
+ "Pops up an X window strip chart, and a FIFO to dump data into";
+
+static int verbose = 0;
+
+#define FLAG_CREATE_FIFO 0x1
+#define FLAG_AXES_ON 0x2
+
+static void help(char *title, char *geometry, char *pipe_name,
+ double y_max, double y_min, int num_points)
+{
+ printf("usage: %s [-%s]\n", func_name, options);
+ puts(description);
+ printf("Version: %s\n\n", VERSION);
+
+ puts("Options:");
+
+ printf("-t <title>\tSet the window title (default: %s)\n", title);
+ printf("-g <geometry>\tSet the initial window geometry (default: %s)\n", geometry);
+ printf("-p <file>\tSet FIFO name (default: %s)\n", pipe_name);
+
+ printf(" %s can either create its own FIFO or use an already existing one.\n",
+ func_name);
+ puts(" Using an existing FIFO avoids the following race condition:");
+ puts("\tFork");
+ printf("\tProcess 1 starts %s\n", func_name);
+ puts("\tProcess 2 sends data to FIFO, but it doesn't exist,");
+ puts("\t\tso file system creates a new file");
+ puts("\tProcess 1 gets around to trying to create the FIFO,");
+ puts("\t\tbut fails because the file already exists");
+ printf("-u\t%s uses an already created FIFO\n", func_name);
+ printf("-c\t%s create the input FIFO (default)\n", func_name);
+
+ printf("-M\tSet Maximum y value (default: %g)\n", y_max);
+ printf("-m\tSet minimum y value (default: %g)\n", y_min);
+ printf("-n\tSet number of points shown at once (default: %d)\n", num_points);
+ puts("-a\tToggle axes (default: on)");
+
+ puts("-v\tIncrement verbosity");
+ puts("-h\tDisplay this help and exit");
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ stripchart_t *chart = NULL;
+ FILE *input;
+ double x=0, y_max, y_min;
+ unsigned int flags;
+ int points_shown_at_once;
+ char *title, *geometry, *pipe_name;
+
+ CHK( getargs(argc, argv, &flags,
+ &title, &geometry, &pipe_name,
+ &y_max, &y_min, &points_shown_at_once) );
+#ifndef AUTOGEN
+ CHK( open_pipe(pipe_name, flags, &input) );
+ if (verbose)
+ fprintf(stderr, "creating stripchart on pipe %s with geom %s\n",
+ pipe_name, geometry);
+#endif
+ CHK( stripchart_create(&chart, title, geometry,
+ y_min, y_max, 1.0,
+ points_shown_at_once,
+ flags & FLAG_AXES_ON) );
+ do {
+#ifndef AUTOGEN
+ if (get_num(input, &x) != 0)
+ break;
+#else
+ x += 0.5;
+ if (x == 9) break;
+ usleep(100000);
+#endif
+ CHK( stripchart_point(chart, x) );
+ } while (TRUE);
+ CHK( stripchart_destroy(&chart) );
+#ifndef AUTOGEN
+ CHK( close_pipe(pipe_name, &input) );
+#endif
+ return 0;
+}
+
+static int string2double(char *string, double *pDouble)
+{
+ char *endp;
+ if (errno != 0) {
+ //perror("sloppy error checking");
+ //fprintf(stderr, "errno = %d\n", errno);
+ //return 1; /* unrecognized input */
+ /* HACK!!! Some Xlib function calls (XOpenDisplay, and others) seem to set
+ * errno to 29, or 11, but still return successfully. I have no idea why,
+ * since I can't find any mention of errno in the Xlib documents, but we'll
+ * just ignore any previous errnos and hope everything works out...
+ */
+ errno = 0;
+ }
+ *pDouble = strtod(string, &endp);
+ if (errno != 0 || endp[0] != '\0') {
+ if (errno != 0) {
+ perror("strtod");
+ fprintf(stderr, "could not parse '%s'\n", string);
+ fprintf(stderr, "endp = \"%s\"\n", endp);
+ fprintf(stderr, "errno = %d\n", errno);
+ }
+ return 1; /* unrecognized input */
+ }
+ return 0;
+}
+
+static int getargs(int argc, char **argv, unsigned int *pFlags,
+ char **pTitle, char **pGeometry, char **pPipe_name,
+ double *pY_max, double *pY_min, int *pPoints_shown_at_once)
+{
+ int c;
+ double temp;
+
+ func_name = argv[0];
+ *pFlags = FLAG_CREATE_FIFO | FLAG_AXES_ON;
+ *pTitle = "Stripchart";
+ *pGeometry = "500x200+0+0";
+ *pPipe_name = "strip_pipe";
+ *pY_max = 10.0;
+ *pY_min = -10.0;
+ *pPoints_shown_at_once = 100;
+
+ while ((c=getopt(argc, argv, options)) != -1) {
+ switch (c) {
+ case 't':
+ *pTitle = optarg;
+ break;
+ case 'g':
+ *pGeometry = optarg;
+ break;
+ case 'p':
+ *pPipe_name = optarg;
+ break;
+ case 'u':
+ *pFlags &= ~FLAG_CREATE_FIFO;
+ break;
+ case 'c':
+ *pFlags |= FLAG_CREATE_FIFO;
+ break;
+ case 'M':
+ if (string2double(optarg, pY_max) != 0)
+ goto error;
+ break;
+ case 'm':
+ if (string2double(optarg, pY_min) != 0)
+ goto error;
+ break;
+ case 'n':
+ if (string2double(optarg, &temp) != 0)
+ goto error;
+ *pPoints_shown_at_once = (int)temp;
+ break;
+ case 'a':
+ *pFlags ^= FLAG_AXES_ON;
+ break;
+ case 'v':
+ verbose++;
+ break;
+ default:
+ printf("Unrecognized option '%c'\n", c);
+ case 'h': /* default falls through */
+ error:
+ printf("Problem with option '%c' (%s)\n", c, optarg);
+ help(*pTitle, *pGeometry, *pPipe_name, *pY_max, *pY_min, *pPoints_shown_at_once);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int open_pipe(char *name, unsigned int flags, FILE **pStream)
+{
+ if (flags & FLAG_CREATE_FIFO) {
+ /* make a fifo with read/write permision for the user */
+ if (mkfifo(name, S_IRUSR | S_IWUSR) != 0) {
+ perror("mkfifo");
+ fprintf(stderr, "Error creating FIFO '%s', aborting\n", name);
+ AST(1==0);
+ }
+ }
+ AST( (*pStream = fopen(name, "a+")) != NULL );
+ return 0;
+}
+
+static int close_pipe(char *name, FILE **pInStream)
+{
+ CHK( fclose(*pInStream) );
+ CHK( remove( name ) );
+ return 0;
+}
+
+static int get_num(FILE *stream, double *px)
+{
+ char buf[BUFSZ];
+
+ if (fgets(buf, BUFSZ, stream) == NULL)
+ return 1; /* end of file or error */
+ if (buf[strlen(buf)-1] == '\n')
+ buf[strlen(buf)-1] = '\0';
+ if ( string2double(buf, px) != 0)
+ return 1;
+ return 0;
+}
--- /dev/null
+/*
+ stripchart - tools for quick & dirty data plotting.
+ Copyright (C) 2008, William Trevor King
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+
+ The author may be contacted at <wking@drexel.edu> on the Internet, or
+ write to Trevor King, Drexel University, Physics Dept., 3141 Chestnut St.,
+ Philadelphia PA 19104, USA.
+
+
+ Plot simple (hopefully fast) strip charts.
+ X bits from Xlib tutorial by Ch. Tronche (http://tronche.lri.fr:8000/)
+ see http://tronche.com/gui/x/xlib/
+ and http://tronche.com/gui/x/xlib-tutorial/2nd-program-anatomy.html
+
+ Double buffering code following Mark Vojkovich
+ http://www.xfree86.org/~mvojkovi/skull.tar.gz
+ */
+
+#include <pthread.h> /* to adapt to user input */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h> /* strlen */
+//#include <plot.h> /* This is "plot.h", the public header file for GNU libplot,
+// a shared library for 2-dimensional vector graphics */
+#include <X11/Xthreads.h> /* since the callback thread and the main thread both call X */
+#include <X11/Xlib.h>
+#include <X11/Xatom.h> /* X datatypes, XA_STRING */
+#include <X11/Xutil.h> /* XTextProperty, XParseGeometry */
+#include "err_mac.h"
+#include "stripchart.h"
+
+//#define VERBOSE_LOCKING
+//#define DEBUGGING_MODE /* Synchronize X */
+#define USE_COLORS /* Non-monochrome output */
+#define USE_DOUBLE_BUFFER /* Write to a pixmap first to reduce screen redraw flicker */
+#define ENABLE_AUTOSCALE /* Calculate minX and minY from the data on mouse-clicks. */
+#define WARN_WHEN_OOB /* Generate some kind of warning output when out of bounds. */
+
+#ifdef ENABLE_AUTOSCALE
+#include <math.h> /* floor(), ceil() */
+#endif
+
+struct stripchart_struct {
+ double minY;
+ double maxY;
+ double *data; /**< 1-D circular buffer of points */
+ int points; /**< length of the buffer */
+ int active_points; /**< while the buffer is still filling */
+ int current_point; /**< our place in the buffer */
+#ifdef ENABLE_AUTOSCALE
+ double scale_res;
+#endif
+
+ /* display information for X */
+ Display *display;
+ int screen;
+ int depth;
+ Window rootwindow;
+ Window window;
+ XID drawable; /* either window or buffer, depending on use of double buffering */
+ GC gc; /**< graphics context */
+ char *title;
+ int ulx;
+ int uly;
+ unsigned int width;
+ unsigned int height;
+ int point_radius; /* in pixels */
+ int axes_on;
+ XFontStruct *font;
+ int blackpixel;
+ int whitepixel;
+#ifdef USE_COLORS
+ XColor greenx, green; /* The X server and screen's respective takes on green */
+#ifdef WARN_WHEN_OOB
+ XColor redx, red;
+#endif /* WARN_WHEN_OOB */
+#endif /* USE_COLORS */
+#ifdef USE_DOUBLE_BUFFER
+ Pixmap buffer;
+ GC copy_gc;
+#endif
+ /* pthread information so we can have a callback thread */
+ pthread_mutex_t lock;
+ int stop;
+ /* done signal, so main thread can lock until callback wraps up? */
+
+ /* derived quantites to avoid repead calculations */
+ double xscale; /* pxls between x values */
+ double yscale; /* pxls between per unit y */
+};
+
+/* Chart logic function */
+static int scale(stripchart_t *chart);
+static int autoscale(stripchart_t *chart);
+static int draw(stripchart_t *chart);
+
+/* X setup and drawing functions */
+static int setup_X (stripchart_t *chart);
+static int close_X (stripchart_t *chart);
+static int set_title(stripchart_t *chart);
+static int get_font(stripchart_t *chart);
+#ifdef USE_COLORS
+static int get_color(stripchart_t *chart, char *color_name, XColor *cx, XColor *c);
+#endif
+static int clear_window(stripchart_t *chart);
+static int draw_point(stripchart_t *chart, int x, float y);
+static int draw_axes(stripchart_t *chart);
+static int flush_window(stripchart_t *chart);
+
+/* Callback functions */
+static int setup_callback_thread(stripchart_t *chart);
+static void *callback_thread(void *arg /* chart */);
+static int wakeup_callback_thread(stripchart_t *chart);
+
+/* Synchronization functions */
+static int lock_chart(stripchart_t *chart);
+static int unlock_chart(stripchart_t *chart);
+
+int stripchart_create(stripchart_t **pChart,
+ char *title,
+ char *geometry, /* eg "570x570+0+0" for upper left*/
+ double minY, double maxY,
+ double scale_res, /* only read if ENABLE_AUTOSCALE */
+ int points_shown_at_once,
+ int axes_on)
+{
+ stripchart_t *chart;
+ int rc;
+
+ AST(pChart != NULL);
+ AST(*pChart == NULL);
+ AST(geometry != NULL);
+ AST(maxY > minY);
+ AST(points_shown_at_once >= 1);
+
+ chart = (stripchart_t *)malloc(sizeof(stripchart_t));
+ *pChart = chart;
+ AST(chart != NULL);
+
+ chart->data = NULL;
+ chart->title = NULL;
+ chart->font = NULL;
+
+ chart->minY = minY;
+ chart->maxY = maxY;
+#ifdef ENABLE_AUTOSCALE
+ chart->scale_res = scale_res;
+#endif
+ chart->points = points_shown_at_once;
+ chart->data = (double *)malloc(sizeof(double)*chart->points);
+ AST(chart->data != NULL);
+ chart->active_points = 0;
+ chart->current_point = 0;
+
+ chart->title = title;
+ /* Set geometry defaults */
+ chart->width=500;
+ chart->height=200;
+ chart->ulx=0;
+ chart->uly=0;
+ /* Parse geometry, rc is bitmask saying which were set */
+ rc = XParseGeometry(geometry, &chart->ulx, &chart->uly,
+ &chart->width, &chart->height);
+ chart->point_radius = 2;
+ chart->axes_on = axes_on;
+ CHK( scale(chart) );
+ CHK( setup_X (chart) );
+ CHK( setup_callback_thread (chart) );
+
+ return SUCCESS;
+}
+
+/* needs a locked chart */
+static int scale(stripchart_t *chart)
+{
+ /* xpxl = xscale * xindex , so (points-1) all the way on the right */
+ chart->xscale = ((double)chart->width)/((double)chart->points-1.0);
+ /* ypxl = yscale * (y-ymax), so ymax = 0, ymin = height */
+ chart->yscale = ((double)chart->height)/(chart->minY - chart->maxY);
+ return SUCCESS;
+}
+
+#ifdef ENABLE_AUTOSCALE
+/* needs a locked chart */
+static int autoscale(stripchart_t *chart)
+{
+ double dataMax, dataMin;
+ int i;
+
+ /* Ensure we have some data */
+ if (chart->active_points == 0)
+ return SUCCESS;
+ /* Find the extreme data points */
+ dataMax = dataMin = chart->data[0];
+ for (i=1; i < chart->active_points; i++) {
+ if (chart->data[i] > dataMax)
+ dataMax = chart->data[i];
+ else if (chart->data[i] < dataMin)
+ dataMin = chart->data[i];
+ }
+ /* round out to units of scale_res */
+ chart->maxY = ceil(dataMax/chart->scale_res)*chart->scale_res;
+ chart->minY = floor(dataMin/chart->scale_res)*chart->scale_res;
+
+ return SUCCESS;
+}
+#endif /* def ENABLE_AUTOSCALE */
+
+/* needs a locked chart */
+static int draw(stripchart_t *chart)
+{
+ int i, j;
+
+ CHK( clear_window(chart) );
+ /* dots */
+ j = chart->current_point;
+ for (i=0; i != chart->active_points; i++)
+ CHK( draw_point(chart, i, chart->data[(j++)%chart->points]) );
+
+ if (chart->axes_on)
+ CHK( draw_axes(chart) );
+ CHK( flush_window(chart) );
+
+ return SUCCESS;
+}
+
+int stripchart_point(stripchart_t *chart, double value)
+{
+ int i, j;
+
+ AST( chart != NULL );
+ CHK( lock_chart(chart) );
+
+ /* Add point */
+ if (chart->active_points != chart->points) { /* no overwrite */
+ chart->data[chart->active_points++] = value;
+ } else { /* overwite an old point */
+ chart->data[chart->current_point++] = value;
+ chart->current_point %= chart->points;
+ }
+ CHK(draw(chart));
+ CHK( unlock_chart(chart) );
+
+ return SUCCESS;
+}
+
+int stripchart_destroy(stripchart_t **pChart)
+{
+ stripchart_t *chart;
+
+ AST(pChart != NULL);
+ chart = *pChart;
+ CHK( lock_chart(chart) );
+ chart = *pChart;
+ *pChart = NULL;
+ if (chart != NULL) {
+ chart->stop = TRUE;
+ }
+ CHK( unlock_chart(chart) );
+ CHK( wakeup_callback_thread(chart) );
+ return SUCCESS;
+}
+
+/* called by the callback_thread
+ * when it sees that it is stop time */
+static int cleanup(stripchart_t *chart)
+{
+ AST(chart != NULL);
+ if (chart->data != NULL)
+ free(chart->data);
+ close_X(chart);
+ free(chart);
+ return SUCCESS;
+}
+
+/* X setup and drawing functions */
+
+static int setup_X (stripchart_t *chart)
+{
+ XEvent event;
+ XSizeHints hints = {0};
+#ifdef USE_DOUBLE_BUFFER
+ XGCValues vals;
+#endif
+
+ /* Make X safe for threads */
+ AST(XInitThreads() != 0);
+
+ /* link to a display */
+ chart->display = XOpenDisplay(NULL); /* argument? */
+ if (chart->display == NULL) {
+ fprintf(stderr, "Error connecting to %s\n", XDisplayName(NULL));
+ AST(chart->display != NULL);
+ }
+
+#ifdef DEBUGGING_MODE
+ XSynchronize(chart->display, 1);
+#endif
+
+ chart->screen = DefaultScreen(chart->display);
+ chart->depth = DefaultDepth(chart->display, chart->screen);
+ chart->rootwindow = DefaultRootWindow(chart->display);
+ /* get some colors */
+ chart->blackpixel = BlackPixel(chart->display, chart->screen);
+ chart->whitepixel = WhitePixel(chart->display, chart->screen);
+
+ /* create a window, window border != window manager's border */
+ chart->window = XCreateSimpleWindow(chart->display, chart->rootwindow,
+ chart->ulx, chart->uly, chart->width, chart->height,
+ 0 /* border width */,
+ chart->blackpixel /* border color */,
+ chart->blackpixel /* bg color */);
+ AST( chart->window );
+#ifdef USE_DOUBLE_BUFFER
+ chart->buffer = XCreatePixmap(chart->display, chart->rootwindow,
+ chart->width, chart->height, chart->depth);
+ AST( chart->buffer );
+ chart->drawable = chart->buffer;
+#else
+ chart->drawable = chart->window;
+#endif
+
+ CHK( set_title(chart) );
+ //XMoveWindow(chart->display, chart->window, -1,-1);
+
+ /* we want MapNotify events for
+ * Structural events: window has appeared on the screen (been mapped),
+ * resized, moved, etc.
+ * Exposure events: server lost information about the contents of a window
+ * ButtonPress : mouse button clicked on window
+ */
+#ifdef ENABLE_AUTOSCALE
+ XSelectInput(chart->display, chart->window,
+ StructureNotifyMask |
+ ExposureMask |
+ ButtonPressMask);
+#else
+ XSelectInput(chart->display, chart->window,
+ StructureNotifyMask |
+ ExposureMask);
+#endif
+ /* Map the window (make it appear on the screen) */
+ XMapWindow(chart->display, chart->window);
+
+ /* Create a "Graphics Context"
+ * X is stateless, so the server doesn't remember attributes
+ * like drawing color, the thickness of the lines and so on.
+ * We have to pass these parameters to the server on each drawing request.
+ * To avoid passing two dozens of parameters, many of them unchanged,
+ * X uses an object called the Graphics Context, or GC for short.
+ */
+ chart->gc = XCreateGC(chart->display, chart->drawable, 0, NULL);
+
+#ifdef USE_COLORS
+ CHK( get_color(chart, "green", &chart->greenx, &chart->green) );
+#ifdef WARN_WHEN_OOB
+ CHK( get_color(chart, "red", &chart->redx, &chart->red) );
+#endif /* WARN_WHEN_OOB */
+#endif /* USE_COLORS */
+#ifdef USE_DOUBLE_BUFFER
+ /* turn off GraphicsExpose events for XCopyArea() requests */
+ vals.graphics_exposures = False;
+ chart->copy_gc = XCreateGC(chart->display, chart->window, GCGraphicsExposures, &vals);
+#endif
+ /* Prepare to draw with a white color */
+ XSetForeground(chart->display, chart->gc, chart->whitepixel);
+ /* leave other parameters at their default values */
+ if (chart->axes_on)
+ CHK( get_font(chart) );
+
+ /* Wait for a MapNotify event */
+ for (;;) {
+ XNextEvent(chart->display, &event);
+ if (event.type == MapNotify)
+ break;
+ }
+
+ return SUCCESS;
+}
+
+static int close_X(stripchart_t *chart)
+{
+ XDestroyWindow(chart->display, chart->window);
+ XFreePixmap(chart->display, chart->window);
+ XFreeGC(chart->display, chart->gc);
+#ifdef USE_DOUBLE_BUFFER
+ XFreeGC(chart->display, chart->copy_gc);
+#endif
+ if (chart->font != NULL)
+ XFreeFontInfo(NULL, chart->font, 1);
+ /* free (char **names, XFontStruct *free_info, int actual_count) ? */
+ XCloseDisplay(chart->display);
+}
+
+static int set_title(stripchart_t *chart)
+{
+ XTextProperty windowName;
+ windowName.value = (unsigned char *) chart->title;
+ windowName.encoding = XA_STRING;
+ windowName.format = 8;
+ windowName.nitems = strlen((char *) windowName.value);
+
+ /* request a title from the windows manager */
+ XSetWMName(chart->display, chart->window, &windowName);
+
+ return SUCCESS;
+}
+
+static int get_font(stripchart_t *chart)
+{
+ GContext gcont;
+
+ gcont = XGContextFromGC(chart->gc);
+ chart->font = XQueryFont(chart->display, gcont);
+
+ return SUCCESS;
+}
+
+#ifdef USE_COLORS
+static int get_color(stripchart_t *chart, char *color_name, XColor *cx, XColor *c)
+{
+ Colormap colormap;
+
+ //AST( XLookupColor(chart->display, colormap, color_name,
+ // NULL, &green_col) != 0 );
+
+ if (DisplayPlanes(chart->display, chart->screen) != 1) {
+ colormap = DefaultColormap(chart->display, chart->screen);
+ if (XAllocNamedColor(chart->display, colormap, color_name, cx, c)) {
+ /* use colors (how do I free the named color?) */
+ /* cx is the idealized color, c is the best the current screen can do */
+ //XSetForeground(chart->display, chart->gc2, color_screen.pixel);
+ return SUCCESS;
+ }
+ }
+ /* just use white */
+ cx->pixel = chart->whitepixel;
+ c->pixel = chart->whitepixel;
+
+ return FAILURE;
+}
+#endif /* def USE_COLORS */
+
+static int clear_window(stripchart_t *chart)
+{
+ int x, y;
+#ifdef USE_DOUBLE_BUFFER
+ XSetForeground(chart->display, chart->gc, chart->blackpixel);
+ XFillRectangle(chart->display, chart->buffer, chart->gc, 0, 0, chart->width, chart->height);
+ XSetForeground(chart->display, chart->gc, chart->whitepixel);
+ /* Send the requests to the server */
+ //XFlush(chart->display);
+#else
+ XClearWindow(chart->display, chart->window);
+#endif
+ return SUCCESS;
+}
+
+static int flush_window(stripchart_t *chart)
+{
+#ifdef USE_DOUBLE_BUFFER
+ /* XCopyArea(display, src, dest, gc, src_x, src_y, width, height, dest_x, dest_y) */
+ XCopyArea(chart->display, chart->buffer, chart->window, chart->copy_gc, 0, 0,
+ chart->width, chart->height, 0, 0);
+ XFlush(chart->display);
+#else
+ XFlush(chart->display);
+#endif
+ return SUCCESS;
+}
+
+static int draw_point(stripchart_t *chart, int x, float y)
+{
+ int xpxl, ypxl;
+ /* find the center of the circle in pixels */
+ xpxl = (int) (chart->xscale * (float)x);
+ ypxl = (int) (chart->yscale * (y - chart->maxY));
+
+#ifdef WARN_WHEN_OOB
+#ifdef USE_COLORS
+ if (y > chart->maxY) {
+ ypxl = 0; /* draw red point at the top of the screen */
+ XSetForeground(chart->display, chart->gc, chart->red.pixel);
+ } else if (y < chart->minY) {
+ ypxl = chart->height; /* draw red point at the bottom of the screen */
+ XSetForeground(chart->display, chart->gc, chart->red.pixel);
+ }
+#endif
+#endif
+
+ /* draw a circle, coords are (x,y) for upper left of bounding box
+ * and the height and width of the bounding box.
+ * Then start and stop angles in degrees * 64
+ * XDrawArc and XFillArc take identical arguments, pick your favorite.
+ */
+ XDrawArc(chart->display, chart->drawable, chart->gc,
+ xpxl - chart->point_radius, ypxl - chart->point_radius,
+ 2*chart->point_radius, 2*chart->point_radius,
+ 0, 360*64);
+
+ // XDrawLine(chart->display, chart->drawable, chart->gc, 10, 60, 180, 20);
+
+#ifdef WARN_WHEN_OOB
+#ifdef USE_COLORS
+ XSetForeground(chart->display, chart->gc, chart->whitepixel);
+#endif
+#endif
+
+ return SUCCESS;
+}
+
+static int draw_axes(stripchart_t *chart)
+{
+ char buffer[80] = {0};
+
+#ifdef USE_COLORS
+ XSetForeground(chart->display, chart->gc, chart->green.pixel);
+#endif
+ /* lable y-max in upper left */
+ sprintf(buffer, "%g", chart->maxY);
+ XDrawString(chart->display, chart->drawable, chart->gc,
+ 0,0+chart->font->ascent,buffer,strlen(buffer));
+
+ /* label y-min in lower left */
+ sprintf(buffer, "%g", chart->minY);
+ XDrawString(chart->display, chart->drawable, chart->gc,
+ 0,chart->height-chart->font->descent+1,
+ buffer,strlen(buffer));
+
+ /* draw X axis */
+ if (chart->maxY > 0 && chart->minY < 0) {
+ int ypxl = (int) (-chart->yscale * chart->maxY);
+ XDrawLine(chart->display, chart->drawable, chart->gc,
+ 0, ypxl, chart->width, ypxl);
+ }
+#ifdef USE_COLORS
+ XSetForeground(chart->display, chart->gc, chart->whitepixel);
+#endif
+
+ return SUCCESS;
+}
+
+
+static int handle_X_callbacks(stripchart_t *chart)
+{
+ XEvent event;
+
+ /* Wait for a Expose event (which neccessitates redrawing. */
+ for (;;) {
+ XNextEvent(chart->display, &event);
+ CHK( lock_chart(chart) );
+ if (chart->stop == TRUE) {
+ CHK( unlock_chart(chart) );
+ goto done;
+ }
+ switch(event.type) {
+ case Expose:
+ CHK( draw(chart) );
+ break;
+ case ConfigureNotify:
+ {
+ XConfigureEvent *pe = (XConfigureEvent *)&event;
+ chart->ulx = pe->x;
+ chart->uly = pe->y;
+ chart->width = pe->width;
+ chart->height = pe->height;
+ }
+#ifdef USE_DOUBLE_BUFFER
+ XFreePixmap(chart->display, chart->buffer);
+ chart->buffer = XCreatePixmap(chart->display, chart->rootwindow,
+ chart->width, chart->height, chart->depth);
+ AST( chart->buffer != 0 );
+ chart->drawable = chart->buffer;
+ //XClearWindow(chart->display, chart->window); /* ? */
+#endif
+ CHK( scale(chart) ); /* Map max and min to pixel values */
+ CHK( draw(chart) );
+ break;
+#ifdef ENABLE_AUTOSCALE
+ case ButtonPress:
+ CHK( autoscale(chart) ); /* Calc new max and min values */
+ CHK( scale(chart) ); /* Map max and min to pixel values */
+ CHK( draw(chart) );
+ break;
+#endif
+ default:
+ break; /* ignore other events */
+ }
+ CHK( unlock_chart(chart) );
+ }
+ done:
+ return SUCCESS;
+}
+
+/* Callback functions */
+
+static int setup_callback_thread(stripchart_t *chart)
+{
+ pthread_t tid;
+ pthread_attr_t attr;
+
+ CHK( pthread_mutex_init(&chart->lock, NULL) );
+ CHK( pthread_attr_init(&attr) );
+ CHK( pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) );
+ CHK( pthread_create(&tid, &attr, &callback_thread, (void *)chart) );
+ CHK( pthread_attr_destroy(&attr) );
+
+ return SUCCESS;
+}
+
+static void *callback_thread(void *arg /* chart */)
+{
+ stripchart_t *chart = (stripchart_t *)arg;
+ handle_X_callbacks(chart);
+ pthread_mutex_destroy(&chart->lock);
+ cleanup(chart);
+ return NULL;
+}
+
+static int wakeup_callback_thread(stripchart_t *chart)
+{
+ XEvent event;
+ event.type = Expose;
+ /* the callback thread is blocking while waiting for events,
+ send it one to wake it, so it checks the stop value */
+ XSendEvent (chart->display, chart->window,
+ FALSE, /* don't neet to propogate, we'll be listening */
+ ExposureMask,
+ &event);
+ return SUCCESS;
+}
+
+/* Synchronization functions */
+
+static int lock_chart(stripchart_t *chart)
+{
+#ifdef VERBOSE_LOCKING
+ fprintf(stderr, "Thread %lu locking %p\n",
+ (unsigned long int)pthread_self(), &chart->lock);
+#endif
+ if (pthread_mutex_lock(&chart->lock) != 0) {
+ perror("lock");
+ AST(1==0);
+ }
+#ifdef VERBOSE_LOCKING
+ fprintf(stderr, "Thread %lu locked %p\n",
+ (unsigned long int)pthread_self(), &chart->lock);
+#endif
+ return SUCCESS;
+}
+
+static int unlock_chart(stripchart_t *chart)
+{
+#ifdef VERBOSE_LOCKING
+ fprintf(stderr, "Thread %lu unlocking %p\n",
+ (unsigned long int)pthread_self(), &chart->lock);
+#endif
+ if(pthread_mutex_unlock(&chart->lock) != 0) {
+ perror("unlock");
+ AST(1==0);
+ }
+#ifdef VERBOSE_LOCKING
+ fprintf(stderr, "Thread %lu unlocked %p\n",
+ (unsigned long int)pthread_self(), &chart->lock);
+#endif
+ return SUCCESS;
+}
--- /dev/null
+/*
+ stripchart - tools for quick & dirty data plotting.
+ Copyright (C) 2008, William Trevor King
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+
+ The author may be contacted at <wking@drexel.edu> on the Internet, or
+ write to Trevor King, Drexel University, Physics Dept., 3141 Chestnut St.,
+ Philadelphia PA 19104, USA.
+ */
+
+typedef struct stripchart_struct stripchart_t;
+
+extern int stripchart_create(stripchart_t **pChart,
+ char *title,
+ char *geometry, /* eg "570x570+0+0" for upper left*/
+ double minY, double maxY,
+ double scale_res,
+ int points_shown_at_once,
+ int axes_on);
+
+extern int stripchart_point(stripchart_t *chart, double value);
+
+extern int stripchart_destroy(stripchart_t **pChart);
--- /dev/null
+#!/bin/bash
+
+mkfifo strip_pipe
+
+stripchart -t 'Test stripchart' -u -M 16 -m -10 -n11 &
+
+cat test.dat | while read LINE
+ do
+ echo $LINE > strip_pipe
+ sleep 1
+done
+
+rm -f strip_pipe
--- /dev/null
+0
+1
+2
+4
+8
+16
+-10
+1e1
+-5.5
+4.3
+1.2
+0
+1
+-2
+4
+-8
+10
+0
+q
--- /dev/null
+#!/bin/bash
+
+mkfifo strip_pipe
+
+./stripchart -t 'Test stripchart' -u -M 16 -m -10 -n11 &
+
+cat test.dat | while read LINE
+ do
+ echo $LINE > strip_pipe
+ sleep 1
+done
+
+rm -f strip_pipe
projects / stripchart.git / commitdiff