447 lines
11 KiB
C
447 lines
11 KiB
C
/* $OpenBSD: strfile.c,v 1.21 2014/11/16 04:49:48 guenther Exp $ */
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/* $NetBSD: strfile.c,v 1.4 1995/04/24 12:23:09 cgd Exp $ */
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/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ken Arnold.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "strfile.h"
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/*
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* This program takes a file composed of strings separated by
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* lines starting with two consecutive delimiting character (default
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* character is '%') and creates another file which consists of a table
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* describing the file (structure from "strfile.h"), a table of seek
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* pointers to the start of the strings, and the strings, each terminated
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* by a null byte. Usage:
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*
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* % strfile [-iorsx] [ -cC ] sourcefile [ datafile ]
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*
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* c - Change delimiting character from '%' to 'C'
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* s - Silent. Give no summary of data processed at the end of
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* the run.
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* o - order the strings in alphabetic order
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* i - if ordering, ignore case
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* r - randomize the order of the strings
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* x - set rotated bit
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*
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* Ken Arnold Sept. 7, 1978 --
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*
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* Added ordering options.
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*/
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#define TRUE 1
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#define FALSE 0
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#define STORING_PTRS (Oflag || Rflag)
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#define CHUNKSIZE 512
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# define ALLOC(ptr,sz) do { \
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if (ptr == NULL) \
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ptr = calloc(CHUNKSIZE, sizeof *ptr); \
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else if (((sz) + 1) % CHUNKSIZE == 0) \
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ptr = realloc(ptr, \
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(sz) + CHUNKSIZE * \
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sizeof(*ptr)); \
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if (ptr == NULL) \
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err(1, NULL); \
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} while (0)
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typedef struct {
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char first;
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int32_t pos;
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} STR;
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char *Infile = NULL, /* input file name */
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Outfile[PATH_MAX] = "", /* output file name */
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Delimch = '%'; /* delimiting character */
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int Sflag = FALSE; /* silent run flag */
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int Oflag = FALSE; /* ordering flag */
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int Iflag = FALSE; /* ignore case flag */
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int Rflag = FALSE; /* randomize order flag */
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int Xflag = FALSE; /* set rotated bit */
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long Num_pts = 0; /* number of pointers/strings */
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int32_t *Seekpts;
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FILE *Sort_1, *Sort_2; /* pointers for sorting */
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STRFILE Tbl; /* statistics table */
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STR *Firstch; /* first chars of each string */
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void add_offset(FILE *, int32_t);
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int cmp_str(const void *, const void *);
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void do_order(void);
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void getargs(int, char **);
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void randomize(void);
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char *unctrl(char);
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void usage(void);
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/*
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* main:
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* Drive the sucker. There are two main modes -- either we store
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* the seek pointers, if the table is to be sorted or randomized,
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* or we write the pointer directly to the file, if we are to stay
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* in file order. If the former, we allocate and re-allocate in
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* CHUNKSIZE blocks; if the latter, we just write each pointer,
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* and then seek back to the beginning to write in the table.
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*/
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int
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main(int ac, char *av[])
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{
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char *sp, dc;
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FILE *inf, *outf;
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int32_t last_off, length, pos;
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int32_t *p;
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int first, cnt;
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char *nsp;
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STR *fp;
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static char string[257];
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getargs(ac, av); /* evalute arguments */
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dc = Delimch;
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if ((inf = fopen(Infile, "r")) == NULL)
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err(1, "%s", Infile);
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if ((outf = fopen(Outfile, "w")) == NULL)
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err(1, "%s", Outfile);
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if (!STORING_PTRS)
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(void) fseek(outf, sizeof Tbl, SEEK_SET);
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/*
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* Write the strings onto the file
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*/
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Tbl.str_longlen = 0;
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Tbl.str_shortlen = (unsigned int) 0xffffffff;
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Tbl.str_delim = dc;
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Tbl.str_version = VERSION;
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first = Oflag;
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add_offset(outf, ftell(inf));
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last_off = 0;
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do {
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sp = fgets(string, sizeof(string), inf);
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if (sp == NULL || (sp[0] == dc && sp[1] == '\n')) {
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pos = ftell(inf);
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length = pos - last_off - (sp ? strlen(sp) : 0);
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last_off = pos;
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if (!length)
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continue;
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add_offset(outf, pos);
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if (Tbl.str_longlen < (u_int32_t)length)
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Tbl.str_longlen = length;
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if (Tbl.str_shortlen > (u_int32_t)length)
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Tbl.str_shortlen = length;
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first = Oflag;
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}
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else if (first) {
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for (nsp = sp; !isalnum(*nsp); nsp++)
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continue;
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ALLOC(Firstch, Num_pts);
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fp = &Firstch[Num_pts - 1];
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if (Iflag && isupper(*nsp))
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fp->first = tolower(*nsp);
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else
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fp->first = *nsp;
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fp->pos = Seekpts[Num_pts - 1];
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first = FALSE;
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}
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} while (sp != NULL);
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/*
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* write the tables in
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*/
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(void) fclose(inf);
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Tbl.str_numstr = Num_pts - 1;
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if (Tbl.str_numstr == 0)
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Tbl.str_shortlen = 0;
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if (Oflag)
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do_order();
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else if (Rflag)
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randomize();
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if (Xflag)
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Tbl.str_flags |= STR_ROTATED;
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if (!Sflag) {
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printf("\"%s\" created\n", Outfile);
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if (Tbl.str_numstr == 1)
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puts("There was 1 string");
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else
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printf("There were %u strings\n", Tbl.str_numstr);
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printf("Longest string: %lu byte%s\n",
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(unsigned long) Tbl.str_longlen,
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Tbl.str_longlen == 1 ? "" : "s");
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printf("Shortest string: %lu byte%s\n",
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(unsigned long) Tbl.str_shortlen,
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Tbl.str_shortlen == 1 ? "" : "s");
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}
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(void) fseek(outf, 0, SEEK_SET);
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Tbl.str_version = htonl(Tbl.str_version);
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Tbl.str_numstr = htonl(Tbl.str_numstr);
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Tbl.str_longlen = htonl(Tbl.str_longlen);
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Tbl.str_shortlen = htonl(Tbl.str_shortlen);
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Tbl.str_flags = htonl(Tbl.str_flags);
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(void) fwrite(&Tbl.str_version, sizeof(Tbl.str_version), 1, outf);
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(void) fwrite(&Tbl.str_numstr, sizeof(Tbl.str_numstr), 1, outf);
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(void) fwrite(&Tbl.str_longlen, sizeof(Tbl.str_longlen), 1, outf);
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(void) fwrite(&Tbl.str_shortlen, sizeof(Tbl.str_shortlen), 1, outf);
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(void) fwrite(&Tbl.str_flags, sizeof(Tbl.str_flags), 1, outf);
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(void) fwrite( Tbl.stuff, sizeof(Tbl.stuff), 1, outf);
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if (STORING_PTRS)
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for (p = Seekpts, cnt = Num_pts; cnt--; ++p) {
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*p = htonl(*p);
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(void) fwrite(p, sizeof(*p), 1, outf);
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}
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if (fclose(outf))
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err(1, "fclose `%s'", Outfile);
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exit(0);
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}
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/*
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* This routine evaluates arguments from the command line
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*/
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void
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getargs(int argc, char *argv[])
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{
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extern char *optarg;
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extern int optind;
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int ch;
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while ((ch = getopt(argc, argv, "c:iorsx")) != -1)
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switch(ch) {
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case 'c': /* new delimiting char */
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Delimch = *optarg;
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if (!isascii(Delimch)) {
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printf("bad delimiting character: '\\%o\n'",
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Delimch);
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}
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break;
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case 'i': /* ignore case in ordering */
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Iflag++;
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break;
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case 'o': /* order strings */
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Oflag++;
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break;
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case 'r': /* randomize pointers */
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Rflag++;
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break;
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case 's': /* silent */
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Sflag++;
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break;
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case 'x': /* set the rotated bit */
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Xflag++;
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break;
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case '?':
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default:
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usage();
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}
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argv += optind;
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if (*argv) {
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Infile = *argv;
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if (*++argv)
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(void) strlcpy(Outfile, *argv, sizeof Outfile);
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}
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if (!Infile) {
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puts("No input file name");
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usage();
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}
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if (*Outfile == '\0') {
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(void) strlcpy(Outfile, Infile, sizeof(Outfile));
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if (strlcat(Outfile, ".dat", sizeof(Outfile)) >= sizeof(Outfile))
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errx(1, "`%s': name too long", Infile);
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}
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}
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void
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usage(void)
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{
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(void) fprintf(stderr,
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"strfile [-iorsx] [-c char] sourcefile [datafile]\n");
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exit(1);
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}
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/*
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* add_offset:
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* Add an offset to the list, or write it out, as appropriate.
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*/
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void
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add_offset(FILE *fp, int32_t off)
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{
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int32_t net;
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if (!STORING_PTRS) {
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net = htonl(off);
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fwrite(&net, 1, sizeof net, fp);
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} else {
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ALLOC(Seekpts, Num_pts + 1);
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Seekpts[Num_pts] = off;
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}
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Num_pts++;
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}
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/*
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* do_order:
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* Order the strings alphabetically (possibly ignoring case).
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*/
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void
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do_order(void)
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{
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int i;
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int32_t *lp;
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STR *fp;
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Sort_1 = fopen(Infile, "r");
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Sort_2 = fopen(Infile, "r");
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qsort((char *) Firstch, (int) Tbl.str_numstr, sizeof *Firstch, cmp_str);
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i = Tbl.str_numstr;
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lp = Seekpts;
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fp = Firstch;
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while (i--)
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*lp++ = fp++->pos;
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(void) fclose(Sort_1);
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(void) fclose(Sort_2);
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Tbl.str_flags |= STR_ORDERED;
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}
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/*
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* cmp_str:
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* Compare two strings in the file
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*/
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char *
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unctrl(char c)
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{
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static char buf[3];
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if (isprint(c)) {
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buf[0] = c;
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buf[1] = '\0';
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}
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else if (c == 0177) {
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buf[0] = '^';
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buf[1] = '?';
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}
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else {
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buf[0] = '^';
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buf[1] = c + 'A' - 1;
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}
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return buf;
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}
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int
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cmp_str(const void *p1, const void *p2)
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{
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int c1, c2;
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int n1, n2;
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# define SET_N(nf,ch) (nf = (ch == '\n'))
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# define IS_END(ch,nf) (ch == Delimch && nf)
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c1 = ((STR *)p1)->first;
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c2 = ((STR *)p2)->first;
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if (c1 != c2)
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return c1 - c2;
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(void) fseek(Sort_1, ((STR *)p1)->pos, SEEK_SET);
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(void) fseek(Sort_2, ((STR *)p2)->pos, SEEK_SET);
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n1 = FALSE;
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n2 = FALSE;
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while (!isalnum(c1 = getc(Sort_1)) && c1 != '\0')
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SET_N(n1, c1);
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while (!isalnum(c2 = getc(Sort_2)) && c2 != '\0')
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SET_N(n2, c2);
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while (!IS_END(c1, n1) && !IS_END(c2, n2)) {
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if (Iflag) {
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if (isupper(c1))
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c1 = tolower(c1);
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if (isupper(c2))
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c2 = tolower(c2);
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}
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if (c1 != c2)
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return c1 - c2;
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SET_N(n1, c1);
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SET_N(n2, c2);
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c1 = getc(Sort_1);
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c2 = getc(Sort_2);
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}
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if (IS_END(c1, n1))
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c1 = 0;
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if (IS_END(c2, n2))
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c2 = 0;
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return c1 - c2;
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}
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/*
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* randomize:
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* Randomize the order of the string table. We must be careful
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* not to randomize across delimiter boundaries. All
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* randomization is done within each block.
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*/
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void
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randomize(void)
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{
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int cnt, i;
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int32_t tmp;
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int32_t *sp;
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Tbl.str_flags |= STR_RANDOM;
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cnt = Tbl.str_numstr;
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/*
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* move things around randomly
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*/
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for (sp = Seekpts; cnt > 0; cnt--, sp++) {
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i = arc4random_uniform(cnt);
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tmp = sp[0];
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sp[0] = sp[i];
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sp[i] = tmp;
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}
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}
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