/bin/prag.awk

http://shell-simulator.googlecode.com/ · AWK · 702 lines · 582 code · 2 blank · 118 comment · 193 complexity · ae297bab4f507146dbcbc0924a1aa19c MD5 · raw file 

    

  1. #!gawk -f

    2. 

  2. #	Copyright (C) 1992, 1993 Holger J. Meyer, Rostock, Germany

    3. 

  3. #	hm@GUUG.de

    4. 

  4. #

    5. 

  5. #	See file ``Copyright'' for terms of copyright.

    6. 

  6. #

    7. 

  7. # Module:

    8. 

  8. #	Process a grap(1) like language, to produce graphs.  The input language

    9. 

  9. #	syntax is documented in lines marked with double hash marks ('##').

    10. 

  10. #	The first implementation was much inspired by the graph program from

    11. 

  11. #	``Aho, A.V., Kernighan, B. W., Weinberger, P. J. "The AWK Programming

    12. 

  12. #	Language", Addison-Wesley, Reading, 1988''.

    13. 

  13. #

    14. 

  14. # Source:

    15. 

  15. #	NAWK

    16. 

  16. #

    17. 

  17. # History:

    18. 

  18. #	92/4/20	hme, initial version written

    19. 

  19. #	93/8/24	hme, multiple graphs, grids, etc. added

    20. 

  20. #	93/10/20	hme, labeled margin boxes, generate `reset' before .PE

    21. 

  21. #	95/9/24	hme, more grap conformance, improved ticks (by eduardo@nostromo.medusa.es)

    22. 

  22. #	95/11/15	hme, put out only labeled margin boxes

    23. 

  23. #

    24. 

  24. # Layout:

    25. 

  25. #

    26. 

  26. #	GRAPH

    27. 

  27. #	+----------+------------------------+----------+

    28. 

  28. #	|          |                     ^  |          |

    29. 

  29. #	|          | TMARG              ht/6|          |

    30. 

  30. #	|          |                     v  |          |

    31. 

  31. #	+----------+------------------------+----------+

    32. 

  32. #	| LMARG    | FRAME               ^  | RMARG    |

    33. 

  33. #	|          |                     |  |          |

    34. 

  34. #	|          |                     |  |          |

    35. 

  35. #	|          |                     ht |          |

    36. 

  36. #	|          |                     |  |          |

    37. 

  37. #	|          |                     |  |          |

    38. 

  38. #	|<-wid/6-->|<---------wid--------v->|<--wid/6->|

    39. 

  39. #	+----------+------------------------+----------+

    40. 

  40. #	|          |                     ^  |          |

    41. 

  41. #	|          | BMARG              ht/6|          |

    42. 

  42. #	|          |                     v  |          |

    43. 

  43. #	+----------+------------------------+----------+

    44. 

  44. #

    45. 

  45. #

    46. 

  46. BEGIN {

    47. 

  47. 	MYADDR = "hm@GUUG.de";

    48. 

  48. 	# number (RE)

    49. 

  49. 	NUMBER = "^[-+]?([0-9]+[.]?[0-9]*|[.][0-9]+)" "([eE][-+]?[0-9]+)?$";

    50. 

  50. 	GNAME = "GRAPH";			# label for whole picture

    51. 

  51. 	FNAME = "FRAME";			# label for frame

    52. 

  52. 	MNAME = "MARG";			# label for [top|....] margin boxes

    53. 

  53. 	DEFLSTYLE = "solid";

    54. 

  54. 	DEFCH = "\\s+2\\(bu\\s-2";

    55. 

  55. 	MARKED = 1;

    56. 

  56. 	MINXTICKS = 5;

    57. 

  57. 	MINYTICKS = 5;

    58. 

  58. 	nG1 = 0;

    59. 

  59. 	grapinput = 0;

    60. 

  60. 	err = 0;

    61. 

  61. 	dot_lf = 1;

    62. 

  62. 	warn = 1;

    63. 

  63. 	debug = 0;

    64. 

  64. }

    65. 

  65. ## .G1 [width [height]]

    66. 

  66. # start of graph input

    67. 

  67. /^.G1/ {

    68. 

  68. 	++nG1;

    69. 

  69. 	grapinput = 1;

    70. 

  70. 	data = 0;

    71. 

  71. 	initgraph();

    72. 

  72. 	if (NF >= 2) {

    73. 

  73. 		wid = $2;

    74. 

  74. 	}

    75. 

  75. 	if (NF >= 3) {

    76. 

  76. 		ht = $3;

    77. 

  77. 	}

    78. 

  78. 	resizegraph();

    79. 

  79. 	if (dot_lf) {

    80. 

  80. 		printf(".lf %d %s\n", FNR, FILENAME);

    81. 

  81. 	}

    82. 

  82. 	next;

    83. 

  83. }

    84. 

  84. ## .G2

    85. 

  85. # end of graph input -- draw graph

    86. 

  86. /^.G2/ {

    87. 

  87. 	if (!grapinput) {

    88. 

  88. 		printf("\"%s\":%d: missing previous .G1\n", FILENAME, FNR) |"cat >&2";

    89. 

  89. 		errexit(-1);

    90. 

  90. 	}

    91. 

  91. 	else {

    92. 

  92. 		endgraph();

    93. 

  93. 		grapinput = 0;

    94. 

  94. 	}

    95. 

  95. 	if (dot_lf) {

    96. 

  96. 		printf(".lf %d %s\n", FNR, FILENAME);

    97. 

  97. 	}

    98. 

  98. 	next;

    99. 

  99. }

    100. 

  100. # copy all outside from .G1 and .G2

    101. 

  101. !grapinput {

    102. 

  102. 	print $0;

    103. 

  103. 	next;

    104. 

  104. }

    105. 

  105. ## # comment

    106. 

  106. # delete comments

    107. 

  107. /^#/ {

    108. 

  108. 	next;

    109. 

  109. }

    110. 

  110. ## draw line-style

    111. 

  111. $1 == "draw" {

    112. 

  112. 	if (NF != 2) {

    113. 

  113. 		printf("\"%s\":%d: draw line-style\n", FILENAME, FNR) | "cat >&2";

    114. 

  114. 		errexit(-1);

    115. 

  115. 	}

    116. 

  116. 	if ($2 == "marked") {

    117. 

  117. 		g_flags[ngs] = MARKED;

    118. 

  118. 	}

    119. 

  119. 	else {

    120. 

  120. 		g_lstyle[ngs] = $2;

    121. 

  121. 	}

    122. 

  122. 	next;

    123. 

  123. }

    124. 

  124. ## new [line-style [name [label]]]

    125. 

  125. # begin new graph, put old data points out

    126. 

  126. $1 == "new" {

    127. 

  127. 	cg = ++ngs;

    128. 

  128. 	newgraph(ngs);

    129. 

  129. 	if (NF >= 2) {

    130. 

  130. 		if ($2 == "marked") {

    131. 

  131. 			g_flags[ngs] = MARKED;

    132. 

  132. 		}

    133. 

  133. 		else {

    134. 

  134. 			g_lstyle[ngs] = $2;

    135. 

  135. 		}

    136. 

  136. 	}

    137. 

  137. 	if (NF >= 3) {

    138. 

  138. 		g_name[ngs] = $3;

    139. 

  139. 	}

    140. 

  140. 	if (NF >= 4) {

    141. 

  141. 		$1 = $2 = $3 = "";

    142. 

  142. 		sub(/^[ \t]*/, "");

    143. 

  143. 		g_label[ngs] = $0;

    144. 

  144. 	}

    145. 

  145. 	g_ndata[ngs] = 0;

    146. 

  146. 	next;

    147. 

  147. }

    148. 

  148. ## label [left | right | top | bot] label-string

    149. 

  149. # left, right, top, bottom label

    150. 

  150. $1 == "label" {

    151. 

  151. 	pos = $2;

    152. 

  152. 	if (pos == "left") {

    153. 

  153. 		sub(/^[ \t]*label[ \t]+left[ \t]*/, "");

    154. 

  154. 	}

    155. 

  155. 	else if (pos == "right") {

    156. 

  156. 		sub(/^[ \t]*label[ \t]+right[ \t]*/, "");

    157. 

  157. 	}

    158. 

  158. 	else if (pos == "top") {

    159. 

  159. 		sub(/^[ \t]*label[ \t]+top[ \t]*/, "");

    160. 

  160. 	}

    161. 

  161. 	else if (pos == "bot") {

    162. 

  162. 		sub(/^[ \t]*label[ \t]+bot[ \t]*/, "");

    163. 

  163. 	}

    164. 

  164. 	else {

    165. 

  165. 		printf("\"%s\":%d: label [left|right|top|bot] string ...\n",

    166. 

  166. 			FILENAME, FNR) | "cat >&2";

    167. 

  167. 		errexit(-1);

    168. 

  168. 	}

    169. 

  169. 	t_label[pos] = $0;

    170. 

  170. 	next;

    171. 

  171. }

    172. 

  172. ## ticks [left | right | top | bot] [where] position ...

    173. 

  173. ## ticks [left | right | top | bot] [where] from begin to end [by step]

    174. 

  174. # ticks for x- & y-axis, left, top, right or bottom position

    175. 

  175. $1 == "ticks" {

    176. 

  176. 	if (NF <= 3) {

    177. 

  177. 		printf("\"%s\":%d: ticks [left|right|top|bot] [where] position ...\n",

    178. 

  178. 			FILENAME, FNR) | "cat >&2";

    179. 

  179. 		errexit(-1);

    180. 

  180. 	}

    181. 

  181. 	if ($2 != "left" && $2 != "right" && $2 != "top" && $2 != "bot") {

    182. 

  182. 		printf("\"%s\":%d: ticks [left|right|top|bot] [where] position ...\n",

    183. 

  183. 			FILENAME, FNR) | "cat >&2";

    184. 

  184. 		errexit(-1);

    185. 

  185. 	}

    186. 

  186. 	i = 3;

    187. 

  187. 	t_num[$2] = 0;

    188. 

  188. 	if ($3 == "in" || $3 == "out") {

    189. 

  189. 		t_where[$2] = $3;

    190. 

  190. 		++i;

    191. 

  191. 	}

    192. 

  192. 	if ($i != "from") {

    193. 

  193. 		while (i <= NF) {

    194. 

  194. 			t_pos[$2, t_num[$2]] = $i;

    195. 

  195. 			++t_num[$2];

    196. 

  196. 			++i;

    197. 

  197. 		}

    198. 

  198. 	}

    199. 

  199. 	else {

    200. 

  200. 		if ($(i+2) != "to" || NF < i+3) {

    201. 

  201. 			printf( "\"%s\":%d: ticks [left|right|top|bot] [where] from begin to end [by step]\n",

    202. 

  202. 				FILENAME, FNR) | "cat >&2";

    203. 

  203. 			errexit(-1);

    204. 

  204. 		}

    205. 

  205. 		if ($(i+4) == "by") {

    206. 

  206. 			if (NF == i+5) {

    207. 

  207. 				tickstep = $(i+5);

    208. 

  208. 			}

    209. 

  209. 			else {

    210. 

  210. 				printf( "\"%s\":%d: ticks [left|right|top|bot] [where] from begin to end [by step]\n",

    211. 

  211. 						FILENAME, FNR) | "cat >&2";

    212. 

  212. 				errexit(-1);

    213. 

  213. 			}

    214. 

  214. 		}

    215. 

  215. 		else {

    216. 

  216. 			tickstep = 1;

    217. 

  217. 		}

    218. 

  218. 		for (tick = $(i+1); tick <= $(i+3); tick += tickstep) {

    219. 

  219. 			t_pos[$2, t_num[$2]] = tick;

    220. 

  220. 			++t_num[$2];

    221. 

  221. 		}

    222. 

  222. 	}

    223. 

  223. 	next;

    224. 

  224. }

    225. 

  225. ## frame frame-attributes ...

    226. 

  226. # frame-attributes

    227. 

  227. $1 == "frame" {

    228. 

  228. 	if (NF == 1) {

    229. 

  229. 		printf("\"%s\":%d: frame frame-attributes ...\n",

    230. 

  230. 			FILENAME, FNR) | "cat >&2";

    231. 

  231. 		errexit(-1);

    232. 

  232. 	}

    233. 

  233. 	sub(/^[ \t]*frame[ \t]+/, "");

    234. 

  234. 	fattr = $0;

    235. 

  235. 	next;

    236. 

  236. }

    237. 

  237. ## spline

    238. 

  238. ## nospline

    239. 

  239. $1 == "spline" {

    240. 

  240. 	g_spline[ngs] = "sp";

    241. 

  241. 	next;

    242. 

  242. }

    243. 

  243. $1 == "nospline" {

    244. 

  244. 	g_spline[ngs] = "";

    245. 

  245. 	next;

    246. 

  246. }

    247. 

  247. ## range xmin ymin xmax ymax

    248. 

  248. $1 == "range" && $2 ~ NUMBER && $3 ~ NUMBER && $4 ~ NUMBER && $5 ~ NUMBER {

    249. 

  249. 	if (NF != 5) {

    250. 

  250. 		printf("\"%s\":%d: range xmin ymin xmax ymax\n",

    251. 

  251. 			FILENAME, FNR) | "cat >&2";

    252. 

  252. 		errexit(-1);

    253. 

  253. 	}

    254. 

  254. 	xmin = $2;

    255. 

  255. 	ymin = $3;

    256. 

  256. 	xmax = $4;

    257. 

  257. 	ymax = $5;

    258. 

  258. 	next;

    259. 

  259. }

    260. 

  260. ## ht number

    261. 

  261. # graph height

    262. 

  262. $1 == "ht" && $2 ~ NUMBER {

    263. 

  263. 	if (NF != 2) {

    264. 

  264. 		printf("\"%s\":%d: ht height\n", FILENAME, FNR) | "cat >&2";

    265. 

  265. 		errexit(-1);

    266. 

  266. 	}

    267. 

  267. 	ht = $2;

    268. 

  268. 	resizegraph();

    269. 

  269. 	next;

    270. 

  270. }

    271. 

  271. ## wid number

    272. 

  272. # graph width

    273. 

  273. $1 == "wid" && $2 ~ NUMBER {

    274. 

  274. 	if (NF != 2) {

    275. 

  275. 		printf("\"%s\":%d: wid width\n", FILENAME, FNR) | "cat >&2";

    276. 

  276. 		errexit(-1);

    277. 

  277. 	}

    278. 

  278. 	wid = $2;

    279. 

  279. 	resizegraph();

    280. 

  280. 	next;

    281. 

  281. }

    282. 

  282. ## grid [line-style]

    283. 

  283. # graph with grid

    284. 

  284. $1 == "grid" {

    285. 

  285. 	if (NF == 1) {

    286. 

  286. 		grid = "dotted";

    287. 

  287. 	}

    288. 

  288. 	else if (NF == 2) {

    289. 

  289. 		grid = $2;

    290. 

  290. 	}

    291. 

  291. 	else {

    292. 

  292. 		printf("\"%s\":%d: grid [line-style]\n", FILENAME, FNR) | "cat >&2";

    293. 

  293. 		errexit(-1);

    294. 

  294. 	}

    295. 

  295. 	next;

    296. 

  296. }

    297. 

  297. ## mark drawing-character

    298. 

  298. # set default drawing character for this graph

    299. 

  299. $1 == "mark" {

    300. 

  300. 	if (NF != 2) {

    301. 

  301. 		printf("\"%s\":%d: mark drawing-character\n", FILENAME, FNR) | "cat >&2";

    302. 

  302. 		errexit(-1);

    303. 

  303. 	}

    304. 

  304. 	g_defch[ngs] = $2;

    305. 

  305. 	g_flags[ngs] = MARKED;

    306. 

  306. 	next;

    307. 

  307. }

    308. 

  308. ## .lf line-number file-name

    309. 

  309. # groff's ``.lf line file''

    310. 

  310. $1 == ".lf" {

    311. 

  311. 	print $0;

    312. 

  312. 	next;

    313. 

  313. }

    314. 

  314. # collecting DATA

    315. 

  315. ## next [graph-name] [at] position

    316. 

  316. # next point extraction: awk falls through these actions!!!

    317. 

  317. $1 == "next" && $3 == "at" {

    318. 

  318. 	found = 0;

    319. 

  319. 	for (i = 0; i <= ngs; ++i) {

    320. 

  320. 		if (g_name[i] == $2) {

    321. 

  321. 			# alter cg to point temporarily to an other graph

    322. 

  322. 			# after collecting data, it shall be restored

    323. 

  323. 			cg = i;

    324. 

  324. 			++found;

    325. 

  325. 			break;

    326. 

  326. 		}

    327. 

  327. 	}

    328. 

  328. 	if (!found) {

    329. 

  329. 		printf("\"%s\":%d: illegal graph-name \"%s\": ignored\n",

    330. 

  330. 			FILENAME, FNR, $2) | "cat >&2";

    331. 

  331. 	}

    332. 

  332. 	sub(/^[ \t]*next[ \t]+[a-zA-Z]+[ \t]+at[ \t]*/, "next at ");

    333. 

  333. }

    334. 

  334. $1 == "next" && $2 == "at" {

    335. 

  335. 	sub(/^[ \t]*next[ \t]+at[ \t]*/, "next ");

    336. 

  336. }

    337. 

  337. $1 == "next" {

    338. 

  338. 	sub(/^[ \t]*next[ \t]*/, "");

    339. 

  339. }

    340. 

  340. # pairs of numbers with opt drawing char

    341. 

  341. $1 ~ NUMBER && $2 ~ NUMBER {

    342. 

  342. 	g_x[cg, g_ndata[cg]] = $1;

    343. 

  343. 	g_y[cg, g_ndata[cg]] = $2;

    344. 

  344. 	if (NF >= 3) {

    345. 

  345. 		$1 = $2 = "";

    346. 

  346. 		sub(/^[ \t]*/, "");

    347. 

  347. 		g_ch[cg, g_ndata[cg]] = $0;	# extra plotting character

    348. 

  348. 	}

    349. 

  349. 	else {

    350. 

  350. 		g_ch[cg, g_ndata[cg]] = "";

    351. 

  351. 	}

    352. 

  352. 	++g_ndata[cg];			# count number of data points

    353. 

  353. 	cg = ngs;				# reset current graph

    354. 

  354. 	data = 1;

    355. 

  355. 	next;

    356. 

  356. }

    357. 

  357. # a single number with opt drawing char

    358. 

  358. $1 ~ NUMBER && $2 !~ NUMBER {

    359. 

  359. 	g_y[cg, g_ndata[cg]] = $1;

    360. 

  360. 	g_x[cg, g_ndata[cg]] = g_ndata[cg];

    361. 

  361. 	if (NF >= 2) {

    362. 

  362. 		$1 = "";

    363. 

  363. 		sub(/^[ \t]*/, "");

    364. 

  364. 		g_ch[cg, g_ndata[cg]] = $0;	# extra plotting character

    365. 

  365. 	}

    366. 

  366. 	else {

    367. 

  367. 		g_ch[cg, g_ndata[cg]] = "";

    368. 

  368. 	}

    369. 

  369. 	++g_ndata[cg];

    370. 

  370. 	cg = ngs;				# reset current graph

    371. 

  371. 	data = 1;

    372. 

  372. 	next;

    373. 

  373. }

    374. 

  374. ## pic '{' anything '}'

    375. 

  375. # rest of input goes direct to pic

    376. 

  376. $1 != "pic" {

    377. 

  377. 	if (warn) {

    378. 

  378. 		printf("\"%s\":%d: inputline passed through pic\n",

    379. 

  379. 			FILENAME, FNR) | "cat >&2";

    380. 

  380. 	}

    381. 

  381. }

    382. 

  382. {

    383. 

  383. 	sub(/^[ \t]*pic[ \t]*{[ \t]*/, "");

    384. 

  384. 	sub(/[ \t]*}[ \t]*$/, "");

    385. 

  385. 	piccode = sprintf("%s%s\n", piccode, $0);

    386. 

  386. 	next;

    387. 

  387. }

    388. 

  388. END {

    389. 

  389. 	if (err) {

    390. 

  390. 		exit(err);

    391. 

  391. 	}

    392. 

  392. 	if (grapinput) {

    393. 

  393. 		printf("\"%s\":%d: missing .G2 \n", FILENAME, FNR) | "cat >&2";

    394. 

  394. 		endgraph();

    395. 

  395. 	}

    396. 

  396. 	exit(0);

    397. 

  397. }

    398. 

  398. #

    399. 

  399. # subroutine stuff

    400. 

  400. #

    401. 

  401. function errexit(e) {

    402. 

  402. 	err = e;

    403. 

  403. 	exit(-1);

    404. 

  404. }

    405. 

  405. function initgraph() {

    406. 

  406. 	ht = 2;					# default frame size

    407. 

  407. 	wid = 3;

    408. 

  408. 	fattr = "";				# frame-attributes

    409. 

  409. 	grid = "";

    410. 

  410. 	ngs = 0;					# number of graphs

    411. 

  411. 	cg = 0;					# current graph, may differ from ngs due to next stmnt.

    412. 

  412. 	# struct graph {

    413. 

  413. 	#	integer	g_flags,		# various flags indicating mark style etc.

    414. 

  414. 	#	string	g_lstyle;		# line style

    415. 

  415. 	#	string	g_spline;		# draw graph with [sp]line

    416. 

  416. 	#	string	g_name;		# graph name

    417. 

  417. 	#	string	g_label;		# graph label

    418. 

  418. 	#	integer	g_ndata;		# # of data items

    419. 

  419. 	#	real		g_x[];		# x coords

    420. 

  420. 	#	real		g_y[];		# y coords

    421. 

  421. 	#	string	g_ch[];		# optional point drawing character

    422. 

  422. 	#	string	g_defch;		# default drawing character

    423. 

  423. 	# };

    424. 

  424. 	g_defch[0] = DEFCH;

    425. 

  425. 	g_defch[1] = "\\(*D";

    426. 

  426. 	g_defch[2] = "\\(pl";

    427. 

  427. 	g_defch[3] = "\\(sq";

    428. 

  428. 	g_defch[4] = "\\(mu";

    429. 

  429. 	newticks("left");

    430. 

  430. 	newticks("right");

    431. 

  431. 	newticks("top");

    432. 

  432. 	newticks("bot");

    433. 

  433. 	newgraph(ngs);

    434. 

  434. 

    435. 

  435. 	piccode = "";

    436. 

  436. 	xmin = xmax = ymin = ymax = 0;

    437. 

  437. }

    438. 

  438. function resizegraph()

    439. 

  439. {

    440. 

  440. 	# left, right, top, bot margin of frame

    441. 

  441. 	m_size["left"] = m_size["right"] = wid/6;

    442. 

  442. 	m_size["top"] = m_size["bot"] = ht/6;

    443. 

  443. 	ticklen = ht/32;			# default len for tick marker

    444. 

  444. }

    445. 

  445. function newgraph(g) {

    446. 

  446. 	g_flags[g] = 0;

    447. 

  447. 	g_lstyle[g] = DEFLSTYLE;

    448. 

  448. 	g_spline[g] = "sp";			# [sp]line used for graph drawing

    449. 

  449. 	g_name[g] = "OOPS";

    450. 

  450. 	g_label[g] = "";

    451. 

  451. 	g_ndata[g] = 0;

    452. 

  452. }

    453. 

  453. function newticks(where) {

    454. 

  454. 	t_label[where] = "";

    455. 

  455. 	t_where[where] = "out";

    456. 

  456. 	t_num[where] = 0;

    457. 

  457. 	t_pos[where, 0] = 0;

    458. 

  458. }

    459. 

  459. function endgraph() {

    460. 

  460. 	grapinput = 0;

    461. 

  461. 	if (!xmin && !xmax && !ymin && !ymax) {	# no range was given

    462. 

  462. 		xmin = xmax = g_x[0, 0];

    463. 

  463. 		ymin = ymax = g_y[0, 0];

    464. 

  464. 		for (g = 0; g <= ngs; ++g) {

    465. 

  465. 			for (i = 0; i < g_ndata[g]; ++i) {

    466. 

  466. 				if (g_x[g, i] < xmin) {

    467. 

  467. 					xmin = g_x[g, i];

    468. 

  468. 				}

    469. 

  469. 				if (g_x[g, i] > xmax) {

    470. 

  470. 					xmax = g_x[g, i];

    471. 

  471. 				}

    472. 

  472. 				if (g_y[g, i] < ymin) {

    473. 

  473. 					ymin = g_y[g, i];

    474. 

  474. 				}

    475. 

  475. 				if (g_y[g, i] > ymax) {

    476. 

  476. 					ymax = g_y[g, i];

    477. 

  477. 				}

    478. 

  478. 			}

    479. 

  479. 		}

    480. 

  480. 	}

    481. 

  481. 	printf(".PS %g %g\n", wid+m_size["left"]+m_size["right"], ht+m_size["top"]+m_size["bot"]);

    482. 

  482. 	printf("# DO NOT EDIT!\n");

    483. 

  483. 	printf("# generated from \"%s\" by prag (C) %s\n", FILENAME, MYADDR);

    484. 

  484. 	if (data) {	# any data?

    485. 

  485. 		cutmarg();

    486. 

  486. 		frame();

    487. 

  487. 		label();

    488. 

  488. 		ticks();

    489. 

  489. 		for (g = 0; g <= ngs; ++g) {

    490. 

  490. 			drawgraph(g);

    491. 

  491. 		}

    492. 

  492. 	}

    493. 

  493. 	if (piccode != "") {

    494. 

  494. 		printf("%s", piccode);

    495. 

  495. 	}

    496. 

  496. 	printf("reset\n.PE\n");

    497. 

  497. }

    498. 

  498. # cut off margins without a label

    499. 

  499. function cutmarg(	w) {

    500. 

  500. 	for (w in m_size) {

    501. 

  501. 		if (t_label[w] == "") {

    502. 

  502. 			m_size[w] = 0;

    503. 

  503. 		}

    504. 

  504. 	}

    505. 

  505. }

    506. 

  506. # create frame from graph

    507. 

  507. function frame() {

    508. 

  508. 	printf("%s:\tbox invis ht %g wid %g\n",

    509. 

  509. 		GNAME, ht+m_size["top"]+m_size["bot"], wid+m_size["left"]+m_size["right"]);

    510. 

  510. 	printf("%s:\tbox %s ht %g wid %g with .sw at %s.sw + (%g, %g)\n",

    511. 

  511. 		FNAME, fattr, ht, wid, GNAME, m_size["left"], m_size["bot"]);

    512. 

  512. }

    513. 

  513. # center label under x-axis and left from y-axis

    514. 

  514. function label() {

    515. 

  515. 	if (t_label["left"]) {

    516. 

  516. 		printf("%s%s:\tbox wid %g ht %g invis %s with .e at %s.w\n",

    517. 

  517. 			MNAME, "left", m_size["left"], ht, t_label["left"], GNAME);

    518. 

  518. 	}

    519. 

  519. 	if (t_label["right"]) {

    520. 

  520. 		printf("%s%s:\tbox wid %g ht %g invis %s with .w at %s.e\n",

    521. 

  521. 			MNAME, "right", m_size["right"], ht, t_label["right"], GNAME);

    522. 

  522. 	}

    523. 

  523. 	if (t_label["top"]) {

    524. 

  524. 		printf("%s%s:\tbox wid %g ht %g invis %s with .s at %s.n\n",

    525. 

  525. 			MNAME, "top", wid, m_size["top"], t_label["top"], GNAME);

    526. 

  526. 	}

    527. 

  527. 	if (t_label["bot"]) {

    528. 

  528. 		printf("%s%s:\tbox wid %g ht %g invis %s with .n at %s.s\n",

    529. 

  529. 			MNAME, "bot", wid, m_size["bot"], t_label["bot"], GNAME);

    530. 

  530. 	}

    531. 

  531. }

    532. 

  532. # create tick marks for all axes

    533. 

  533. function ticks(	i, user_ticks, w) {

    534. 

  534. 	user_ticks = 0;

    535. 

  535. 	for (i = 0; i < t_num["left"]; ++i) {

    536. 

  536. 		printf("line %s %g at %g <%s.sw, %s.nw>\n",

    537. 

  537. 			t_where["left"] == "out" ? "left" : "right",

    538. 

  538. 			ticklen, w = yscale(t_pos["left", i]), FNAME, FNAME);

    539. 

  539. 		printf("\"%s \" at last line.w rjust\n", t_pos["left", i]);

    540. 

  540. 		if (w != 0 && w != 1 && grid != "") {

    541. 

  541. 			printf("line %s from %g <%s.sw, %s.nw> to %g <%s.se, %s.ne>\n",

    542. 

  542. 				grid, w, FNAME, FNAME, w, FNAME, FNAME);

    543. 

  543. 		}

    544. 

  544. 		++user_ticks;

    545. 

  545. 	}

    546. 

  546. 	for (i = 0; i < t_num["right"]; ++i) {

    547. 

  547. 		printf("line %s %g at %g <%s.se, %s.ne>\n",

    548. 

  548. 			t_where["right"] == "out" ? "right" : "left",

    549. 

  549. 			ticklen, yscale(t_pos["right", i]), FNAME, FNAME);

    550. 

  550. 		printf("\" %s\" at last line.e ljust\n", t_pos["right", i]);

    551. 

  551. 		++user_ticks;

    552. 

  552. 	}

    553. 

  553. 	for (i = 0; i < t_num["top"]; ++i) {

    554. 

  554. 		printf("line %s %g at %g <%s.nw, %s.ne>\n",

    555. 

  555. 			t_where["bot"] == "out" ? "up" : "down",

    556. 

  556. 			ticklen, xscale(t_pos["top", i]), FNAME, FNAME);

    557. 

  557. 		printf("\"%s\" at last line.n above\n", t_pos["top", i]);

    558. 

  558. 		++user_ticks;

    559. 

  559. 	}

    560. 

  560. 	for (i = 0; i < t_num["bot"]; ++i) {

    561. 

  561. 		printf("line %s %g at %g <%s.sw, %s.se>\n",

    562. 

  562. 			t_where["bot"] == "out" ? "down" : "up",

    563. 

  563. 			ticklen, w = xscale(t_pos["bot", i]), FNAME, FNAME);

    564. 

  564. 		printf("\"%s\" at last line.s below\n", t_pos["bot", i]);

    565. 

  565. 		if (w != 0 && w != 1 && grid != "") {

    566. 

  566. 			printf("line %s from %g <%s.sw, %s.se> to %g <%s.nw, %s.ne>\n",

    567. 

  567. 				grid, w, FNAME, FNAME, w, FNAME, FNAME);

    568. 

  568. 		}

    569. 

  569. 		++user_ticks;

    570. 

  570. 	}

    571. 

  571. 	if (!user_ticks) {

    572. 

  572. 		xmax = roundceil(MINXTICKS, xmax);

    573. 

  573. 		ymax = roundceil(MINYTICKS, ymax);

    574. 

  574. 		xmin = roundfloor(MINXTICKS, xmin);

    575. 

  575. 		ymin = roundfloor(MINYTICKS, ymin);

    576. 

  576. 		ysteps = steps(MINYTICKS, ymin, ymax);

    577. 

  577. 		#for (i = 0; i <= ysteps; ++i) {

    578. 

  578. 		for (i = 1; i < ysteps; ++i) {

    579. 

  579. 			printf("line left %g at %g <%s.sw, %s.nw>\n",

    580. 

  580. 				ticklen, w = i/ysteps, FNAME, FNAME);

    581. 

  581. 			printf("\"%s\" at last line.w rjust\n", ymin + (ymax - ymin)*i/ysteps);

    582. 

  582. 			if (w != 0 && w != 1 && grid != "") {

    583. 

  583. 				printf("line %s from %g <%s.sw, %s.nw> to %g <%s.se, %s.ne>\n",

    584. 

  584. 					grid, w, FNAME, FNAME, w, FNAME, FNAME);

    585. 

  585. 			}

    586. 

  586. 		}

    587. 

  587. 		xsteps = steps(MINXTICKS, xmin, xmax);

    588. 

  588. 		#for (i = 0; i <= xsteps; ++i) {

    589. 

  589. 		for (i = 1; i < xsteps; ++i) {

    590. 

  590. 			printf("line down %g at %g <%s.sw, %s.se>\n",

    591. 

  591. 				ticklen, w = i/xsteps, FNAME, FNAME);

    592. 

  592. 			printf("\"%s\" at last line.s below\n", xmin + (xmax - xmin)*i/xsteps);

    593. 

  593. 			if (w != 0 && w != 1 && grid != "") {

    594. 

  594. 				printf("line %s from %g <%s.sw, %s.se> to %g <%s.nw, %s.ne>\n",

    595. 

  595. 					grid, w, FNAME, FNAME, w, FNAME, FNAME);

    596. 

  596. 			}

    597. 

  597. 		}

    598. 

  598. 	}

    599. 

  599. }

    600. 

  600. # scale x-value

    601. 

  601. function xscale(x) {

    602. 

  602. 	return((x-xmin)/(xmax-xmin));

    603. 

  603. }

    604. 

  604. # scale y-value

    605. 

  605. function yscale(y) {

    606. 

  606. 	return((y-ymin)/(ymax-ymin));

    607. 

  607. }

    608. 

  608. # round ranges, VERY POOR!

    609. 

  609. # round to smallest e*10^log10(val) + n*e .gt. val

    610. 

  610. function roundceil(ex, val,	e, v) {

    611. 

  611. 	e = ex;

    612. 

  612. 	while (e < val) {

    613. 

  613. 		e *= 10;

    614. 

  614. 	}

    615. 

  615. 	v = val;

    616. 

  616. 	if (int(v) % e) {

    617. 

  617. 		v = e*(int(v/e) + 1);

    618. 

  618. 	}

    619. 

  619. 	while (v >= val) {

    620. 

  620. 		v -= ex;

    621. 

  621. 	}

    622. 

  622. 	if (debug) {

    623. 

  623. 		printf("roundceil(%g, %g) returns %g\n",

    624. 

  624. 			ex, val, v + ex) | "cat >&2";

    625. 

  625. 	}

    626. 

  626. 	return(v + ex);

    627. 

  627. }

    628. 

  628. # round to greatest e*10^log10(val) - n*e .lt. val

    629. 

  629. function roundfloor(ex, val,	e, v) {

    630. 

  630. 	e = ex;

    631. 

  631. 	while (e < val) {

    632. 

  632. 		e *= 10;

    633. 

  633. 	}

    634. 

  634. 	if (e > ex) {

    635. 

  635. 		e /= 10;

    636. 

  636. 	}

    637. 

  637. 	v = val;

    638. 

  638. 	if (int(v) % e) {

    639. 

  639. 		v = e*(int(v/e));

    640. 

  640. 	}

    641. 

  641. 	while (v <= val) {

    642. 

  642. 		v += ex;

    643. 

  643. 	}

    644. 

  644. 	if (debug) {

    645. 

  645. 		printf("roundfloor(%g, %g) returns %g\n",

    646. 

  646. 			ex, val, v - ex) | "cat >&2";

    647. 

  647. 	}

    648. 

  648. 	return(v - ex);

    649. 

  649. }

    650. 

  650. # count of ticks

    651. 

  651. function steps(defsteps, min, max)

    652. 

  652. {

    653. 

  653. 	# very simple solution

    654. 

  654. 	return(defsteps);

    655. 

  655. }

    656. 

  656. # sorting routine

    657. 

  657. function swap(g, i, j,	t) {

    658. 

  658. 	t = g_x[g, i];

    659. 

  659. 	g_x[g, i] = g_x[g, j];

    660. 

  660. 	g_x[g, j] = t;

    661. 

  661. 	t = g_y[g, i];

    662. 

  662. 	g_y[g, i] = g_y[g, j];

    663. 

  663. 	g_y[g, j] = t;

    664. 

  664. 	t = g_ch[g, i];

    665. 

  665. 	g_ch[g, i] = g_ch[g, j];

    666. 

  666. 	g_ch[g, j] = t;

    667. 

  667. }

    668. 

  668. # insertion sort

    669. 

  669. function sort(g,	i, j) {

    670. 

  670. 	for (i = 1; i < g_ndata[g]; ++i) {

    671. 

  671. 		for (j = i; j > 0 && g_x[g, j - 1] > g_x[g, j]; --j) {

    672. 

  672. 			swap(g, j - 1, j);

    673. 

  673. 		}

    674. 

  674. 	}

    675. 

  675. }

    676. 

  676. 

    677. 

  677. # create data points

    678. 

  678. function drawgraph(g,	i) {

    679. 

  679. 	if (g_ndata[g] == 0) {

    680. 

  680. 		return;

    681. 

  681. 	}

    682. 

  682. 	sort(g);

    683. 

  683. 	printf("G_%s: # graph no. %d\n", g_name[g], g + 1);

    684. 

  684. 	if (g_lstyle[g] == "invis" || g_flags[g] == MARKED) {

    685. 

  685. 		for (i = 0; i < g_ndata[g]; ++i) {

    686. 

  686. 			printf("\"%s\" at %s.sw + (%g, %g)\n",

    687. 

  687. 				g_ch[g, i] != "" ? g_ch[g, i] : (g_defch[g] != "" ? g_defch[g] : DEFCH), 

    688. 

  688. 				FNAME, xscale(g_x[g, i])*wid, yscale(g_y[g, i])*ht);

    689. 

  689. 		}

    690. 

  690. 	}

    691. 

  691. 	if (g_lstyle[g] != "invis") {

    692. 

  692. 		printf("%sline %s %s from %s.sw + (%g, %g)",

    693. 

  693. 			g_spline[g], g_label[g], g_lstyle[g] == "solid" ? "" : g_lstyle[g],

    694. 

  694. 			FNAME, xscale(g_x[g, 0])*wid, yscale(g_y[g, 0])*ht);

    695. 

  695. 		for (i = 1; i < g_ndata[g]; ++i) {

    696. 

  696. 			printf("\t\\\n\tthen to %s.sw + (%g, %g)", FNAME,

    697. 

  697. 				xscale(g_x[g, i])*wid, yscale(g_y[g, i])*ht);

    698. 

  698. 		}

    699. 

  699. 		printf("\n");

    700. 

  700. 	}

    701. 

  701. }

    702. 

  702. #vi: set tabstop=5 shiftwidth=5:
    703.