freebsd-dev/usr.bin/fortune/strfile/strfile.c

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/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ken Arnold.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char sccsid[] = "@(#)strfile.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/endian.h>
#include <ctype.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "strfile.h"
/*
* This program takes a file composed of strings separated by
* lines starting with two consecutive delimiting character (default
* character is '%') and creates another file which consists of a table
* describing the file (structure from "strfile.h"), a table of seek
* pointers to the start of the strings, and the strings, each terminated
* by a null byte. Usage:
*
* % strfile [-iorsx] [ -cC ] sourcefile [ datafile ]
*
* C - Allow comments marked by a double delimiter at line's beginning
* c - Change delimiting character from '%' to 'C'
* s - Silent. Give no summary of data processed at the end of
* the run.
* o - order the strings in alphabetic order
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* i - if ordering, ignore case
* r - randomize the order of the strings
* x - set rotated bit
*
* Ken Arnold Sept. 7, 1978 --
*
* Added ordering options.
*/
#define STORING_PTRS (Oflag || Rflag)
#define CHUNKSIZE 512
#define ALLOC(ptr, sz) do { \
if (ptr == NULL) \
ptr = malloc(CHUNKSIZE * sizeof(*ptr)); \
else if (((sz) + 1) % CHUNKSIZE == 0) \
ptr = realloc(ptr, ((sz) + CHUNKSIZE) * sizeof(*ptr)); \
if (ptr == NULL) { \
fprintf(stderr, "out of space\n"); \
exit(1); \
} \
} while (0)
typedef struct {
int first;
off_t pos;
} STR;
static char *Infile = NULL, /* input file name */
Outfile[MAXPATHLEN] = "", /* output file name */
Delimch = '%'; /* delimiting character */
static int Cflag = false; /* embedded comments */
static int Sflag = false; /* silent run flag */
static int Oflag = false; /* ordering flag */
static int Iflag = false; /* ignore case flag */
static int Rflag = false; /* randomize order flag */
static int Xflag = false; /* set rotated bit */
static uint32_t Num_pts = 0; /* number of pointers/strings */
static off_t *Seekpts;
static FILE *Sort_1, *Sort_2; /* pointers for sorting */
static STRFILE Tbl; /* statistics table */
static STR *Firstch; /* first chars of each string */
static void add_offset(FILE *, off_t);
static int cmp_str(const void *, const void *);
static int stable_collate_range_cmp(int, int);
static void do_order(void);
static void getargs(int, char **);
static void randomize(void);
static void usage(void);
/*
* main:
* Drive the sucker. There are two main modes -- either we store
* the seek pointers, if the table is to be sorted or randomized,
* or we write the pointer directly to the file, if we are to stay
* in file order. If the former, we allocate and re-allocate in
* CHUNKSIZE blocks; if the latter, we just write each pointer,
* and then seek back to the beginning to write in the table.
*/
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int
main(int ac, char *av[])
{
char *sp, *nsp, dc;
FILE *inf, *outf;
off_t last_off, pos, *p;
size_t length;
int first;
uint32_t cnt;
STR *fp;
static char string[257];
setlocale(LC_ALL, "");
getargs(ac, av); /* evalute arguments */
dc = Delimch;
if ((inf = fopen(Infile, "r")) == NULL) {
perror(Infile);
exit(1);
}
if ((outf = fopen(Outfile, "w")) == NULL) {
perror(Outfile);
exit(1);
}
if (!STORING_PTRS)
fseek(outf, (long)sizeof(Tbl), SEEK_SET);
/*
* Write the strings onto the file
*/
Tbl.str_longlen = 0;
Tbl.str_shortlen = 0xffffffff;
Tbl.str_delim = dc;
Tbl.str_version = VERSION;
first = Oflag;
add_offset(outf, ftello(inf));
last_off = 0;
do {
sp = fgets(string, 256, inf);
if (sp == NULL || (sp[0] == dc && sp[1] == '\n')) {
pos = ftello(inf);
length = (size_t)(pos - last_off) -
(sp != NULL ? strlen(sp) : 0);
last_off = pos;
if (length == 0)
continue;
add_offset(outf, pos);
if ((size_t)Tbl.str_longlen < length)
Tbl.str_longlen = length;
if ((size_t)Tbl.str_shortlen > length)
Tbl.str_shortlen = length;
first = Oflag;
}
else if (first) {
for (nsp = sp; !isalnum((unsigned char)*nsp); nsp++)
continue;
ALLOC(Firstch, Num_pts);
fp = &Firstch[Num_pts - 1];
if (Iflag && isupper((unsigned char)*nsp))
fp->first = tolower((unsigned char)*nsp);
else
fp->first = *nsp;
fp->pos = Seekpts[Num_pts - 1];
first = false;
}
} while (sp != NULL);
/*
* write the tables in
*/
fclose(inf);
Tbl.str_numstr = Num_pts - 1;
if (Cflag)
Tbl.str_flags |= STR_COMMENTS;
if (Oflag)
do_order();
else if (Rflag)
randomize();
if (Xflag)
Tbl.str_flags |= STR_ROTATED;
if (!Sflag) {
printf("\"%s\" created\n", Outfile);
if (Num_pts == 2)
puts("There was 1 string");
else
printf("There were %u strings\n", Num_pts - 1);
printf("Longest string: %u byte%s\n", Tbl.str_longlen,
Tbl.str_longlen == 1 ? "" : "s");
printf("Shortest string: %u byte%s\n", Tbl.str_shortlen,
Tbl.str_shortlen == 1 ? "" : "s");
}
rewind(outf);
Tbl.str_version = htobe32(Tbl.str_version);
Tbl.str_numstr = htobe32(Tbl.str_numstr);
Tbl.str_longlen = htobe32(Tbl.str_longlen);
Tbl.str_shortlen = htobe32(Tbl.str_shortlen);
Tbl.str_flags = htobe32(Tbl.str_flags);
fwrite((char *)&Tbl, sizeof(Tbl), 1, outf);
if (STORING_PTRS) {
for (p = Seekpts, cnt = Num_pts; cnt--; ++p)
*p = htobe64(*p);
fwrite(Seekpts, sizeof(*Seekpts), (size_t)Num_pts, outf);
}
fclose(outf);
exit(0);
}
/*
* This routine evaluates arguments from the command line
*/
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void
getargs(int argc, char **argv)
{
int ch;
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while ((ch = getopt(argc, argv, "Cc:iorsx")) != -1)
switch(ch) {
case 'C': /* embedded comments */
Cflag++;
break;
case 'c': /* new delimiting char */
Delimch = *optarg;
if (!isascii(Delimch)) {
printf("bad delimiting character: '\\%o\n'",
(unsigned char)Delimch);
}
break;
case 'i': /* ignore case in ordering */
Iflag++;
break;
case 'o': /* order strings */
Oflag++;
break;
case 'r': /* randomize pointers */
Rflag++;
break;
case 's': /* silent */
Sflag++;
break;
case 'x': /* set the rotated bit */
Xflag++;
break;
case '?':
default:
usage();
}
argv += optind;
if (*argv) {
Infile = *argv;
if (*++argv)
strcpy(Outfile, *argv);
}
if (!Infile) {
puts("No input file name");
usage();
}
if (*Outfile == '\0') {
strlcpy(Outfile, Infile, sizeof(Outfile));
strlcat(Outfile, ".dat", sizeof(Outfile));
}
}
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void
usage(void)
{
fprintf(stderr,
"strfile [-Ciorsx] [-c char] source_file [output_file]\n");
exit(1);
}
/*
* add_offset:
* Add an offset to the list, or write it out, as appropriate.
*/
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void
add_offset(FILE *fp, off_t off)
{
off_t beoff;
if (!STORING_PTRS) {
beoff = htobe64(off);
fwrite(&beoff, 1, sizeof(beoff), fp);
} else {
ALLOC(Seekpts, Num_pts + 1);
Seekpts[Num_pts] = off;
}
Num_pts++;
}
/*
* do_order:
* Order the strings alphabetically (possibly ignoring case).
*/
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void
do_order(void)
{
uint32_t i;
off_t *lp;
STR *fp;
Sort_1 = fopen(Infile, "r");
Sort_2 = fopen(Infile, "r");
qsort(Firstch, (size_t)Tbl.str_numstr, sizeof(*Firstch), cmp_str);
i = Tbl.str_numstr;
lp = Seekpts;
fp = Firstch;
while (i--)
*lp++ = fp++->pos;
fclose(Sort_1);
fclose(Sort_2);
Tbl.str_flags |= STR_ORDERED;
}
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static int
stable_collate_range_cmp(int c1, int c2)
{
static char s1[2], s2[2];
int ret;
s1[0] = c1;
s2[0] = c2;
if ((ret = strcoll(s1, s2)) != 0)
return (ret);
return (c1 - c2);
}
/*
* cmp_str:
* Compare two strings in the file
*/
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int
cmp_str(const void *s1, const void *s2)
{
const STR *p1, *p2;
int c1, c2, n1, n2, r;
#define SET_N(nf,ch) (nf = (ch == '\n'))
#define IS_END(ch,nf) (ch == EOF || (ch == (unsigned char)Delimch && nf))
p1 = (const STR *)s1;
p2 = (const STR *)s2;
c1 = (unsigned char)p1->first;
c2 = (unsigned char)p2->first;
if ((r = stable_collate_range_cmp(c1, c2)) != 0)
return (r);
fseeko(Sort_1, p1->pos, SEEK_SET);
fseeko(Sort_2, p2->pos, SEEK_SET);
n1 = false;
n2 = false;
while (!isalnum(c1 = getc(Sort_1)) && c1 != '\0' && c1 != EOF)
SET_N(n1, c1);
while (!isalnum(c2 = getc(Sort_2)) && c2 != '\0' && c2 != EOF)
SET_N(n2, c2);
while (!IS_END(c1, n1) && !IS_END(c2, n2)) {
if (Iflag) {
if (isupper(c1))
c1 = tolower(c1);
if (isupper(c2))
c2 = tolower(c2);
}
if ((r = stable_collate_range_cmp(c1, c2)) != 0)
return (r);
SET_N(n1, c1);
SET_N(n2, c2);
c1 = getc(Sort_1);
c2 = getc(Sort_2);
}
if (IS_END(c1, n1))
c1 = 0;
if (IS_END(c2, n2))
c2 = 0;
return (stable_collate_range_cmp(c1, c2));
}
/*
* randomize:
* Randomize the order of the string table. We must be careful
* not to randomize across delimiter boundaries. All
* randomization is done within each block.
*/
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void
randomize(void)
{
uint32_t cnt, i;
off_t tmp;
off_t *sp;
Tbl.str_flags |= STR_RANDOM;
cnt = Tbl.str_numstr;
/*
* move things around randomly
*/
for (sp = Seekpts; cnt > 0; cnt--, sp++) {
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i = arc4random_uniform(cnt);
tmp = sp[0];
sp[0] = sp[i];
sp[i] = tmp;
}
}