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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* igraph.c - interactive graphing program. |
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* |
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* 6/30/86 |
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* |
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* Greg Ward Larson |
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*/ |
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|
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#include <stdio.h> |
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|
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#include <ctype.h> |
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|
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#include <setjmp.h> |
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|
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#include "mgvars.h" |
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|
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typedef struct { |
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char *descrip; /* description */ |
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char *value; /* value */ |
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} SMAP; |
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|
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#define NDEV 10 /* number of devices */ |
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|
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SMAP dev[NDEV] = { |
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{ "Tektronix 4014", "t4014" }, |
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{ "AED 512", "output aed5" }, |
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{ "X10 Window System", "xmeta" }, |
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{ "X11 Window System", "x11meta" }, |
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{ "Epson Printer", "output mx80" }, |
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{ "Mannesman-Tally Printer", "output mt160" }, |
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{ "Mannesman-Tally High Density", "output mt160l" }, |
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{ "Apple Imagewriter", "output imagew" }, |
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{ "Imagen Printer", "impress | ipr" }, |
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{ "Postscript Printer", "psmeta | lpr" }, |
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}; |
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|
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#define NTYP 7 /* number of plot types */ |
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|
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SMAP typ[NTYP] = { |
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{ "Cartesian Plot", "cartesian.plt" }, |
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{ "Polar Plot (degrees)", "polar.plt" }, |
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{ "Curve Plot (symbols & lines)", "curve.plt" }, |
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{ "Scatter Plot (symbols only)", "scatter.plt" }, |
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{ "Line Plot (lines only)", "line.plt" }, |
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{ "Function Plot (lines)", "function.plt" }, |
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{ "Box and Whisker Plot", "boxw.plt" }, |
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}; |
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|
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#define NCAL 3 /* number of calculation types */ |
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|
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SMAP cal[NCAL] = { |
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{ "Extrema, Average", "nma" }, |
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{ "Integral", "ni" }, |
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{ "Linear Regression", "nl" }, |
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}; |
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|
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char *progname; |
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|
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char *libpath[4]; |
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|
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static int recover = 0; /* try to recover? */ |
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|
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static jmp_buf env; /* setjmp buffer */ |
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|
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static char curfile[64] = "temp.plt"; /* current file name */ |
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|
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char *getfile(), *gets(), *strcpy(); |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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char *getenv(); |
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int i; |
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|
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progname = argv[0]; |
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libpath[0] = "./"; |
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if ((libpath[i=1] = getenv("MDIR")) != NULL) |
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i++; |
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libpath[i++] = MDIR; |
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libpath[i] = NULL; |
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|
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for (i = 1; i < argc; i++) |
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mgload(strcpy(curfile, argv[i])); |
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|
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mainmenu(); |
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|
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quit(0); |
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} |
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|
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|
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eputs(msg) /* print error message */ |
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char *msg; |
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{ |
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fputs(msg, stderr); |
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} |
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|
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|
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quit(code) /* recover or quit */ |
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int code; |
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{ |
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if (code && recover--) |
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longjmp(env, 1); |
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exit(code); |
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} |
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|
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|
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mainmenu() /* the main menu loop */ |
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{ |
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char sbuf[128]; |
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|
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for ( ; ; ) { |
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printf("\nGRAPH MENU\n"); |
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printf("\t1 New Plot\n"); |
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printf("\t2 Set Plot Type\n"); |
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printf("\t3 Load Plot File\n"); |
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printf("\t4 Save Plot File\n"); |
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printf("\t5 Change Plot Variable\n"); |
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printf("\t6 Change Curve Variable\n"); |
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printf("\t7 Output Plot\n"); |
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printf("\t8 Escape Command\n"); |
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printf("\t9 Computation\n"); |
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printf("\t10 Quit\n"); |
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|
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printf("\nChoice: "); |
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clearerr(stdin); gets(sbuf); |
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if (feof(stdin)) |
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return; |
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switch (atoi(sbuf)) { |
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case 1: /* new plot */ |
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mgclearall(); |
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break; |
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case 2: /* set plot type */ |
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settype(); |
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break; |
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case 3: /* load plot file */ |
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if (setjmp(env) == 0) { |
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recover = 1; |
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mgload(getfile()); |
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recover = 0; |
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} else |
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uwait(); |
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break; |
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case 4: /* save plot file */ |
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if (setjmp(env) == 0) { |
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recover = 1; |
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mgsave(getfile()); |
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recover = 0; |
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} else |
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uwait(); |
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break; |
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case 5: /* set plot variable */ |
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setvars(NVARS, gparam); |
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break; |
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case 6: /* set curve variable */ |
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printf("\nCurve (A-%c): ", MAXCUR-1+'A'); |
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clearerr(stdin); gets(sbuf); |
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if (islower(sbuf[0])) |
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sbuf[0] -= 'a'; |
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else if (isupper(sbuf[0])) |
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sbuf[0] -= 'A'; |
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else |
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break; |
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if (sbuf[0] < MAXCUR) |
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setvars(NCVARS, cparam[sbuf[0]]); |
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break; |
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case 7: /* output plot */ |
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plotout(); |
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break; |
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case 8: /* escape command */ |
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printf("\nCommand: "); |
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clearerr(stdin); gets(sbuf); |
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if (sbuf[0]) { |
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system(sbuf); |
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uwait(); |
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} |
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break; |
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case 9: /* computation */ |
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gcompute(); |
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break; |
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case 10: /* quit */ |
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return; |
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} |
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} |
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} |
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|
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|
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char * |
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getfile() /* get file name from user */ |
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{ |
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char sbuf[128]; |
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|
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printf("\nFile (%s): ", curfile); |
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clearerr(stdin); gets(sbuf); |
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if (sbuf[0] == '-') |
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return(NULL); |
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if (sbuf[0]) |
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strcpy(curfile, sbuf); |
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return(curfile); |
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} |
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|
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|
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settype() /* set plot type */ |
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{ |
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char sbuf[128]; |
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int i; |
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|
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printf("\nPLOT TYPE\n"); |
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|
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for (i = 0; i < NTYP; i++) |
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printf("\t%d %s\n", i+1, typ[i].descrip); |
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|
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printf("\nChoice (0): "); |
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clearerr(stdin); gets(sbuf); |
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i = atoi(sbuf) - 1; |
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if (i < 0 || i >= NTYP) |
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return; |
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sprintf(sbuf, "include=%s", typ[i].value); |
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setmgvar("plot type", stdin, sbuf); |
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} |
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|
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|
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plotout() /* output our graph */ |
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{ |
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extern FILE *pout, *popen(); |
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char sbuf[128]; |
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char *command; |
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int i; |
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|
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printf("\nOUTPUT PLOT\n"); |
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|
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for (i = 0; i < NDEV; i++) |
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printf("\t%d %s\n", i+1, dev[i].descrip); |
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printf("\t%d Dumb Terminal\n", NDEV+1); |
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printf("\t%d Other\n", NDEV+2); |
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|
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printf("\nChoice (0): "); |
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clearerr(stdin); gets(sbuf); |
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i = atoi(sbuf) - 1; |
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if (i < 0 || i > NDEV+1) |
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return; |
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if (i < NDEV) |
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command = dev[i].value; |
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else if (i == NDEV) { |
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if (setjmp(env) == 0) { |
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recover = 1; |
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cgraph(79, 22); |
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recover = 0; |
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} |
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uwait(); |
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return; |
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} else if (i == NDEV+1) { |
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printf("\nDriver command: "); |
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clearerr(stdin); gets(sbuf); |
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if (!sbuf[0]) |
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return; |
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command = sbuf; |
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} |
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if ((pout = popen(command, "w")) == NULL) { |
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fprintf(stderr, "%s: cannot execute device driver: %s\n", |
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progname, dev[i].value); |
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quit(1); |
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} |
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if (setjmp(env) == 0) { |
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recover = 1; |
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mgraph(); |
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recover = 0; |
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} else |
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uwait(); |
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mdone(); |
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pclose(pout); |
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} |
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|
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|
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setvars(nvar, vars) /* set variables */ |
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int nvar; |
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VARIABLE vars[]; |
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{ |
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char sbuf[128]; |
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int i, j; |
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|
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for ( ; ; ) { |
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printf("\nVARIABLES\n"); |
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|
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for (i = 0; i < nvar; i++) |
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printf("\t%d %s\n", i+1, vars[i].descrip == NULL ? |
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vars[i].name : vars[i].descrip); |
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|
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printf("\nChoice (0): "); |
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clearerr(stdin); gets(sbuf); |
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i = atoi(sbuf) - 1; |
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if (i < 0 || i >= nvar) |
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return; |
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printf("\n%s", vars[i].name); |
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if (vars[i].type == FUNCTION) |
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printf("(x)"); |
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if (vars[i].flags & DEFINED) { |
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mgtoa(sbuf, &vars[i]); |
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printf(" (%s)", sbuf); |
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} |
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printf(": "); |
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if (vars[i].type == FUNCTION) |
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sprintf(sbuf, "%s(x)=", vars[i].name); |
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else |
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sprintf(sbuf, "%s=", vars[i].name); |
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j = strlen(sbuf); |
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clearerr(stdin); gets(sbuf+j); |
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if (sbuf[j]) { |
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if (vars[i].type == DATA && sbuf[j] == '-') |
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sbuf[j] = '\0'; |
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|
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if (setjmp(env) == 0) { |
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recover = 1; |
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setmgvar("variable set", stdin, sbuf); |
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recover = 0; |
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} else |
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uwait(); |
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} |
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} |
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} |
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|
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|
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gcompute() /* do a computation */ |
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{ |
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char sbuf[64]; |
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int i; |
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|
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printf("\nCOMPUTE\n"); |
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|
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for (i = 0; i < NCAL; i++) |
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printf("\t%d %s\n", i+1, cal[i].descrip); |
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|
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printf("\nChoice (0): "); |
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clearerr(stdin); gets(sbuf); |
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i = atoi(sbuf) - 1; |
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if (i < 0 || i >= NCAL) |
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return; |
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printf("\n"); |
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if (setjmp(env) == 0) { |
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recover = 1; |
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gcalc(cal[i].value); |
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recover = 0; |
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} |
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printf("\n"); |
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uwait(); |
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} |
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|
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|
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uwait() /* wait for user after command, error */ |
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{ |
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printf("Hit return to continue: "); |
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while (getchar() != '\n') |
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; |
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} |
