From 2fbdf974338bde8576efdae40a819a76b2391033 Mon Sep 17 00:00:00 2001 From: "Juan J. Martinez" Date: Sun, 5 Nov 2023 11:22:55 +0000 Subject: Initial import of the open source release --- .../src/libdivsufsort/examples/sasearch.c | 165 +++++++++++++++++++++ 1 file changed, 165 insertions(+) create mode 100644 tools/apultra_src/src/libdivsufsort/examples/sasearch.c (limited to 'tools/apultra_src/src/libdivsufsort/examples/sasearch.c') diff --git a/tools/apultra_src/src/libdivsufsort/examples/sasearch.c b/tools/apultra_src/src/libdivsufsort/examples/sasearch.c new file mode 100644 index 0000000..7e5ca4f --- /dev/null +++ b/tools/apultra_src/src/libdivsufsort/examples/sasearch.c @@ -0,0 +1,165 @@ +/* + * 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 +#if HAVE_STRING_H +# include +#endif +#if HAVE_STDLIB_H +# include +#endif +#if HAVE_MEMORY_H +# include +#endif +#if HAVE_STDDEF_H +# include +#endif +#if HAVE_STRINGS_H +# include +#endif +#if HAVE_SYS_TYPES_H +# include +#endif +#if HAVE_IO_H && HAVE_FCNTL_H +# include +# include +#endif +#include +#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; +} -- cgit v1.2.3