1 /*
2  * Copyright (c) 1989 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Ken Arnold.
7  *
8  * Redistribution and use in source and binary forms are permitted
9  * provided that the above copyright notice and this paragraph are
10  * duplicated in all such forms and that any documentation,
11  * advertising materials, and other materials related to such
12  * distribution and use acknowledge that the software was developed
13  * by the University of California, Berkeley.  The name of the
14  * University may not be used to endorse or promote products derived
15  * from this software without specific prior written permission.
16  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19  */
20 
21 #ifndef lint
22 char copyright[] =
23 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
24  All rights reserved.\n";
25 #endif /* not lint */
26 
27 #ifndef lint
28 static char sccsid[] = "@(#)strfile.c	5.10 (Berkeley) 09/07/89";
29 #endif /* not lint */
30 
31 # include	<sys/param.h>
32 # include	<sys/types.h>
33 # include	<stdio.h>
34 # include	<ctype.h>
35 # include	"strfile.h"
36 
37 # ifndef MAXPATHLEN
38 # define	MAXPATHLEN	1024
39 # endif	/* MAXPATHLEN */
40 
41 /*
42  *	This program takes a file composed of strings seperated by
43  * lines starting with two consecutive delimiting character (default
44  * character is '%') and creates another file which consists of a table
45  * describing the file (structure from "strfile.h"), a table of seek
46  * pointers to the start of the strings, and the strings, each terminated
47  * by a null byte.  Usage:
48  *
49  *	% strfile [-iorsx] [ -cC ] sourcefile [ datafile ]
50  *
51  *	c - Change delimiting character from '%' to 'C'
52  *	s - Silent.  Give no summary of data processed at the end of
53  *	    the run.
54  *	o - order the strings in alphabetic order
55  *	i - if ordering, ignore case
56  *	r - randomize the order of the strings
57  *	x - set rotated bit
58  *
59  *		Ken Arnold	Sept. 7, 1978 --
60  *
61  *	Added ordering options.
62  */
63 
64 # define	TRUE	1
65 # define	FALSE	0
66 
67 # define	STORING_PTRS	(Oflag || Rflag)
68 # define	CHUNKSIZE	512
69 
70 #ifdef lint
71 # define	ALWAYS	atoi("1")
72 #else
73 # define	ALWAYS	1
74 #endif
75 # define	ALLOC(ptr,sz)	if (ALWAYS) { \
76 			if (ptr == NULL) \
77 				ptr = malloc((unsigned int) (CHUNKSIZE * sizeof *ptr)); \
78 			else if (((sz) + 1) % CHUNKSIZE == 0) \
79 				ptr = realloc((void *) ptr, ((unsigned int) ((sz) + CHUNKSIZE) * sizeof *ptr)); \
80 			if (ptr == NULL) { \
81 				fprintf(stderr, "out of space\n"); \
82 				exit(1); \
83 			} \
84 		} else
85 
86 #ifdef NO_VOID
87 # define	void	char
88 #endif
89 
90 typedef struct {
91 	char	first;
92 	off_t	pos;
93 } STR;
94 
95 char	*Infile		= NULL,		/* input file name */
96 	Outfile[MAXPATHLEN] = "",	/* output file name */
97 	Delimch		= '%';		/* delimiting character */
98 
99 int	Sflag		= FALSE;	/* silent run flag */
100 int	Oflag		= FALSE;	/* ordering flag */
101 int	Iflag		= FALSE;	/* ignore case flag */
102 int	Rflag		= FALSE;	/* randomize order flag */
103 int	Xflag		= FALSE;	/* set rotated bit */
104 long	Num_pts		= 0;		/* number of pointers/strings */
105 
106 off_t	*Seekpts;
107 
108 FILE	*Sort_1, *Sort_2;		/* pointers for sorting */
109 
110 STRFILE	Tbl;				/* statistics table */
111 
112 STR	*Firstch;			/* first chars of each string */
113 
114 char	*fgets(), *strcpy(), *strcat();
115 
116 void	*malloc(), *realloc();
117 
118 /*
119  * main:
120  *	Drive the sucker.  There are two main modes -- either we store
121  *	the seek pointers, if the table is to be sorted or randomized,
122  *	or we write the pointer directly to the file, if we are to stay
123  *	in file order.  If the former, we allocate and re-allocate in
124  *	CHUNKSIZE blocks; if the latter, we just write each pointer,
125  *	and then seek back to the beginning to write in the table.
126  */
127 main(ac, av)
128 int	ac;
129 char	**av;
130 {
131 	register char		*sp, dc;
132 	register FILE		*inf, *outf;
133 	register off_t		last_off, length, pos, *p;
134 	register int		first, cnt;
135 	register char		*nsp;
136 	register STR		*fp;
137 	static char		string[257];
138 
139 	getargs(ac, av);		/* evalute arguments */
140 	dc = Delimch;
141 	if ((inf = fopen(Infile, "r")) == NULL) {
142 		perror(Infile);
143 		exit(1);
144 	}
145 
146 	if ((outf = fopen(Outfile, "w")) == NULL) {
147 		perror(Outfile);
148 		exit(1);
149 	}
150 	if (!STORING_PTRS)
151 		(void) fseek(outf, sizeof Tbl, 0);
152 
153 	/*
154 	 * Write the strings onto the file
155 	 */
156 
157 	Tbl.str_longlen = 0;
158 	Tbl.str_shortlen = (unsigned int) 0xffffffff;
159 	Tbl.str_delim = dc;
160 	Tbl.str_version = VERSION;
161 	first = Oflag;
162 	add_offset(outf, ftell(inf));
163 	last_off = 0;
164 	do {
165 		sp = fgets(string, 256, inf);
166 		if (sp == NULL || sp[0] == dc && sp[1] == '\n') {
167 			pos = ftell(inf);
168 			length = pos - last_off - strlen(sp);
169 			last_off = pos;
170 			if (!length)
171 				continue;
172 			add_offset(outf, pos);
173 			if (Tbl.str_longlen < length)
174 				Tbl.str_longlen = length;
175 			if (Tbl.str_shortlen > length)
176 				Tbl.str_shortlen = length;
177 			first = Oflag;
178 		}
179 		else if (first) {
180 			for (nsp = sp; !isalnum(*nsp); nsp++)
181 				continue;
182 			ALLOC(Firstch, Num_pts);
183 			fp = &Firstch[Num_pts - 1];
184 			if (Iflag && isupper(*nsp))
185 				fp->first = tolower(*nsp);
186 			else
187 				fp->first = *nsp;
188 			fp->pos = Seekpts[Num_pts - 1];
189 			first = FALSE;
190 		}
191 	} while (sp != NULL);
192 
193 	/*
194 	 * write the tables in
195 	 */
196 
197 	(void) fclose(inf);
198 
199 	if (Oflag)
200 		do_order();
201 	else if (Rflag)
202 		randomize();
203 
204 	if (Xflag)
205 		Tbl.str_flags |= STR_ROTATED;
206 
207 	if (!Sflag) {
208 		printf("\"%s\" created\n", Outfile);
209 		if (Num_pts == 2)
210 			puts("There was 1 string");
211 		else
212 			printf("There were %d strings\n", Num_pts - 1);
213 		printf("Longest string: %lu byte%s\n", Tbl.str_longlen,
214 		       Tbl.str_longlen == 1 ? "" : "s");
215 		printf("Shortest string: %lu byte%s\n", Tbl.str_shortlen,
216 		       Tbl.str_shortlen == 1 ? "" : "s");
217 	}
218 
219 	(void) fseek(outf, (off_t) 0, 0);
220 	Tbl.str_version = htonl(Tbl.str_version);
221 	Tbl.str_numstr = htonl(Num_pts - 1);
222 	Tbl.str_longlen = htonl(Tbl.str_longlen);
223 	Tbl.str_shortlen = htonl(Tbl.str_shortlen);
224 	Tbl.str_flags = htonl(Tbl.str_flags);
225 	(void) fwrite((char *) &Tbl, sizeof Tbl, 1, outf);
226 	if (STORING_PTRS) {
227 		for (p = Seekpts, cnt = Num_pts; cnt--; ++p)
228 			*p = htonl(*p);
229 		(void) fwrite((char *) Seekpts, sizeof *Seekpts, (int) Num_pts, outf);
230 	}
231 	(void) fclose(outf);
232 	exit(0);
233 }
234 
235 /*
236  *	This routine evaluates arguments from the command line
237  */
238 getargs(argc, argv)
239 int	argc;
240 char	**argv;
241 {
242 	extern char	*optarg;
243 	extern int	optind;
244 	int	ch;
245 
246 	while ((ch = getopt(argc, argv, "c:iorsx")) != EOF)
247 		switch(ch) {
248 		case 'c':			/* new delimiting char */
249 			Delimch = *optarg;
250 			if (!isascii(Delimch)) {
251 				printf("bad delimiting character: '\\%o\n'",
252 				       Delimch);
253 			}
254 			break;
255 		case 'i':			/* ignore case in ordering */
256 			Iflag++;
257 			break;
258 		case 'o':			/* order strings */
259 			Oflag++;
260 			break;
261 		case 'r':			/* randomize pointers */
262 			Rflag++;
263 			break;
264 		case 's':			/* silent */
265 			Sflag++;
266 			break;
267 		case 'x':			/* set the rotated bit */
268 			Xflag++;
269 			break;
270 		case '?':
271 		default:
272 			usage();
273 		}
274 	argv += optind;
275 
276 	if (*argv) {
277 		Infile = *argv;
278 		if (*++argv)
279 			(void) strcpy(Outfile, *argv);
280 	}
281 	if (!Infile) {
282 		puts("No input file name");
283 		usage();
284 	}
285 	if (*Outfile == '\0') {
286 		(void) strcpy(Outfile, Infile);
287 		(void) strcat(Outfile, ".dat");
288 	}
289 }
290 
291 usage()
292 {
293 	(void) fprintf(stderr,
294 	    "strfile [-iorsx] [-c char] sourcefile [datafile]\n");
295 	exit(1);
296 }
297 
298 /*
299  * add_offset:
300  *	Add an offset to the list, or write it out, as appropriate.
301  */
302 add_offset(fp, off)
303 FILE	*fp;
304 off_t	off;
305 {
306 	off_t net;
307 
308 	if (!STORING_PTRS) {
309 		net = htonl(off);
310 		fwrite(&net, 1, sizeof net, fp);
311 	} else {
312 		ALLOC(Seekpts, Num_pts + 1);
313 		Seekpts[Num_pts] = off;
314 	}
315 	Num_pts++;
316 }
317 
318 /*
319  * do_order:
320  *	Order the strings alphabetically (possibly ignoring case).
321  */
322 do_order()
323 {
324 	register int	i;
325 	register off_t	*lp;
326 	register STR	*fp;
327 	extern int	cmp_str();
328 
329 	Sort_1 = fopen(Infile, "r");
330 	Sort_2 = fopen(Infile, "r");
331 	qsort((char *) Firstch, (int) Tbl.str_numstr, sizeof *Firstch, cmp_str);
332 	i = Tbl.str_numstr;
333 	lp = Seekpts;
334 	fp = Firstch;
335 	while (i--)
336 		*lp++ = fp++->pos;
337 	(void) fclose(Sort_1);
338 	(void) fclose(Sort_2);
339 	Tbl.str_flags |= STR_ORDERED;
340 }
341 
342 /*
343  * cmp_str:
344  *	Compare two strings in the file
345  */
346 char *
347 unctrl(c)
348 char c;
349 {
350 	static char	buf[3];
351 
352 	if (isprint(c)) {
353 		buf[0] = c;
354 		buf[1] = '\0';
355 	}
356 	else if (c == 0177) {
357 		buf[0] = '^';
358 		buf[1] = '?';
359 	}
360 	else {
361 		buf[0] = '^';
362 		buf[1] = c + 'A' - 1;
363 	}
364 	return buf;
365 }
366 
367 cmp_str(p1, p2)
368 STR	*p1, *p2;
369 {
370 	register int	c1, c2;
371 	register int	n1, n2;
372 
373 # define	SET_N(nf,ch)	(nf = (ch == '\n'))
374 # define	IS_END(ch,nf)	(ch == Delimch && nf)
375 
376 	c1 = p1->first;
377 	c2 = p2->first;
378 	if (c1 != c2)
379 		return c1 - c2;
380 
381 	(void) fseek(Sort_1, p1->pos, 0);
382 	(void) fseek(Sort_2, p2->pos, 0);
383 
384 	n1 = FALSE;
385 	n2 = FALSE;
386 	while (!isalnum(c1 = getc(Sort_1)) && c1 != '\0')
387 		SET_N(n1, c1);
388 	while (!isalnum(c2 = getc(Sort_2)) && c2 != '\0')
389 		SET_N(n2, c2);
390 
391 	while (!IS_END(c1, n1) && !IS_END(c2, n2)) {
392 		if (Iflag) {
393 			if (isupper(c1))
394 				c1 = tolower(c1);
395 			if (isupper(c2))
396 				c2 = tolower(c2);
397 		}
398 		if (c1 != c2)
399 			return c1 - c2;
400 		SET_N(n1, c1);
401 		SET_N(n2, c2);
402 		c1 = getc(Sort_1);
403 		c2 = getc(Sort_2);
404 	}
405 	if (IS_END(c1, n1))
406 		c1 = 0;
407 	if (IS_END(c2, n2))
408 		c2 = 0;
409 	return c1 - c2;
410 }
411 
412 /*
413  * randomize:
414  *	Randomize the order of the string table.  We must be careful
415  *	not to randomize across delimiter boundaries.  All
416  *	randomization is done within each block.
417  */
418 randomize()
419 {
420 	register int	cnt, i;
421 	register off_t	tmp;
422 	register off_t	*sp;
423 	extern time_t	time();
424 
425 	srandom((int)(time((time_t *) NULL) + getpid()));
426 
427 	Tbl.str_flags |= STR_RANDOM;
428 	cnt = Tbl.str_numstr;
429 
430 	/*
431 	 * move things around randomly
432 	 */
433 
434 	for (sp = Seekpts; cnt > 0; cnt--, sp++) {
435 		i = random() % cnt;
436 		tmp = sp[0];
437 		sp[0] = sp[i];
438 		sp[i] = tmp;
439 	}
440 }
441