From cdf588112266f35fd12ad505fcb04f52150c1b5c Mon Sep 17 00:00:00 2001 From: "W. Trevor King" Date: Tue, 28 Oct 2008 06:59:05 -0400 Subject: [PATCH 1/1] Began versioning (version 0.5) --- CHANGELOG | 7 + LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 38 +++ README | 17 ++ err_mac.h | 140 +++++++++++ strip.c | 255 +++++++++++++++++++ stripchart.c | 682 +++++++++++++++++++++++++++++++++++++++++++++++++++ stripchart.h | 37 +++ test | 13 + test.dat | 19 ++ test.sh | 13 + 11 files changed, 1895 insertions(+) create mode 100644 CHANGELOG create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README create mode 100644 err_mac.h create mode 100644 strip.c create mode 100644 stripchart.c create mode 100644 stripchart.h create mode 100755 test create mode 100644 test.dat create mode 100755 test.sh diff --git a/CHANGELOG b/CHANGELOG new file mode 100644 index 0000000..e980fe4 --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,7 @@ +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. + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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If not, see . + +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: + + Copyright (C) + 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 +. + + 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 +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..e7a9078 --- /dev/null +++ b/Makefile @@ -0,0 +1,38 @@ +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%) diff --git a/README b/README new file mode 100644 index 0000000..b64115b --- /dev/null +++ b/README @@ -0,0 +1,17 @@ +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 diff --git a/err_mac.h b/err_mac.h new file mode 100644 index 0000000..ad50762 --- /dev/null +++ b/err_mac.h @@ -0,0 +1,140 @@ +/* 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) diff --git a/strip.c b/strip.c new file mode 100644 index 0000000..b20b36b --- /dev/null +++ b/strip.c @@ -0,0 +1,255 @@ +/* + 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 on the Internet, or + write to Trevor King, Drexel University, Physics Dept., 3141 Chestnut St., + Philadelphia PA 19104, USA. + */ + +#include +#include +#include +#include +#include +#include /* 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 \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; +} diff --git a/stripchart.c b/stripchart.c new file mode 100644 index 0000000..f995c98 --- /dev/null +++ b/stripchart.c @@ -0,0 +1,682 @@ +/* + 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; +} diff --git a/stripchart.h b/stripchart.h new file mode 100644 index 0000000..b738e09 --- /dev/null +++ b/stripchart.h @@ -0,0 +1,37 @@ +/* + 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); diff --git a/test b/test new file mode 100755 index 0000000..02596d0 --- /dev/null +++ b/test @@ -0,0 +1,13 @@ +#!/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 diff --git a/test.dat b/test.dat new file mode 100644 index 0000000..65bdc90 --- /dev/null +++ b/test.dat @@ -0,0 +1,19 @@ +0 +1 +2 +4 +8 +16 +-10 +1e1 +-5.5 +4.3 +1.2 +0 +1 +-2 +4 +-8 +10 +0 +q diff --git a/test.sh b/test.sh new file mode 100755 index 0000000..0b9e463 --- /dev/null +++ b/test.sh @@ -0,0 +1,13 @@ +#!/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 -- 2.26.2