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/*
* sasearch.c for libdivsufsort
* Copyright (c) 2003-2008 Yuta Mori All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#if HAVE_STRING_H
# include <string.h>
#endif
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#if HAVE_MEMORY_H
# include <memory.h>
#endif
#if HAVE_STDDEF_H
# include <stddef.h>
#endif
#if HAVE_STRINGS_H
# include <strings.h>
#endif
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_IO_H && HAVE_FCNTL_H
# include <io.h>
# include <fcntl.h>
#endif
#include <divsufsort.h>
#include "lfs.h"
static
void
print_help(const char *progname, int status) {
fprintf(stderr,
"sasearch, a simple SA-based full-text search tool, version %s\n",
divsufsort_version());
fprintf(stderr, "usage: %s PATTERN FILE SAFILE\n\n", progname);
exit(status);
}
int
main(int argc, const char *argv[]) {
FILE *fp;
const char *P;
sauchar_t *T;
saidx_t *SA;
LFS_OFF_T n;
size_t Psize;
saidx_t i, size, left;
if((argc == 1) ||
(strcmp(argv[1], "-h") == 0) ||
(strcmp(argv[1], "--help") == 0)) { print_help(argv[0], EXIT_SUCCESS); }
if(argc != 4) { print_help(argv[0], EXIT_FAILURE); }
P = argv[1];
Psize = strlen(P);
/* Open a file for reading. */
#if HAVE_FOPEN_S
if(fopen_s(&fp, argv[2], "rb") != 0) {
#else
if((fp = LFS_FOPEN(argv[2], "rb")) == NULL) {
#endif
fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], argv[2]);
perror(NULL);
exit(EXIT_FAILURE);
}
/* Get the file size. */
if(LFS_FSEEK(fp, 0, SEEK_END) == 0) {
n = LFS_FTELL(fp);
rewind(fp);
if(n < 0) {
fprintf(stderr, "%s: Cannot ftell `%s': ", argv[0], argv[2]);
perror(NULL);
exit(EXIT_FAILURE);
}
} else {
fprintf(stderr, "%s: Cannot fseek `%s': ", argv[0], argv[2]);
perror(NULL);
exit(EXIT_FAILURE);
}
/* Allocate 5n bytes of memory. */
T = (sauchar_t *)malloc((size_t)n * sizeof(sauchar_t));
SA = (saidx_t *)malloc((size_t)n * sizeof(saidx_t));
if((T == NULL) || (SA == NULL)) {
fprintf(stderr, "%s: Cannot allocate memory.\n", argv[0]);
exit(EXIT_FAILURE);
}
/* Read n bytes of data. */
if(fread(T, sizeof(sauchar_t), (size_t)n, fp) != (size_t)n) {
fprintf(stderr, "%s: %s `%s': ",
argv[0],
(ferror(fp) || !feof(fp)) ? "Cannot read from" : "Unexpected EOF in",
argv[2]);
perror(NULL);
exit(EXIT_FAILURE);
}
fclose(fp);
/* Open the SA file for reading. */
#if HAVE_FOPEN_S
if(fopen_s(&fp, argv[3], "rb") != 0) {
#else
if((fp = LFS_FOPEN(argv[3], "rb")) == NULL) {
#endif
fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], argv[3]);
perror(NULL);
exit(EXIT_FAILURE);
}
/* Read n * sizeof(saidx_t) bytes of data. */
if(fread(SA, sizeof(saidx_t), (size_t)n, fp) != (size_t)n) {
fprintf(stderr, "%s: %s `%s': ",
argv[0],
(ferror(fp) || !feof(fp)) ? "Cannot read from" : "Unexpected EOF in",
argv[3]);
perror(NULL);
exit(EXIT_FAILURE);
}
fclose(fp);
/* Search and print */
size = sa_search(T, (saidx_t)n,
(const sauchar_t *)P, (saidx_t)Psize,
SA, (saidx_t)n, &left);
for(i = 0; i < size; ++i) {
fprintf(stdout, "%" PRIdSAIDX_T "\n", SA[left + i]);
}
/* Deallocate memory. */
free(SA);
free(T);
return 0;
}
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