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-rw-r--r--examples/sasearch.c165
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diff --git a/examples/sasearch.c b/examples/sasearch.c
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+++ b/examples/sasearch.c
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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;
+}