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author | Juan J. Martinez <jjm@usebox.net> | 2022-09-06 07:37:20 +0100 |
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committer | Juan J. Martinez <jjm@usebox.net> | 2022-09-06 07:37:20 +0100 |
commit | 30bf0f51335e87812ffeb54e9437f0b6a1514d67 (patch) | |
tree | 9c85a2de53b4da69fcfaa84488cc6c12ebd3e5d0 /tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c | |
parent | d8990284057e6401d0374f439df51879595d804d (diff) | |
download | ubox-msx-lib-30bf0f51335e87812ffeb54e9437f0b6a1514d67.tar.gz ubox-msx-lib-30bf0f51335e87812ffeb54e9437f0b6a1514d67.zip |
Updated rasm to 1.7
Diffstat (limited to 'tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c')
-rw-r--r-- | tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c b/tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c new file mode 100644 index 0000000..c0f19e9 --- /dev/null +++ b/tools/rasm/apultra-master/src/libdivsufsort/examples/unbwt.c @@ -0,0 +1,207 @@ +/* + * unbwt.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 <time.h> +#include <divsufsort.h> +#include "lfs.h" + + +static +size_t +read_int(FILE *fp, saidx_t *n) { + unsigned char c[4]; + size_t m = fread(c, sizeof(unsigned char), 4, fp); + if(m == 4) { + *n = (c[0] << 0) | (c[1] << 8) | + (c[2] << 16) | (c[3] << 24); + } + return m; +} + +static +void +print_help(const char *progname, int status) { + fprintf(stderr, + "unbwt, an inverse burrows-wheeler transform program, version %s.\n", + divsufsort_version()); + fprintf(stderr, "usage: %s INFILE OUTFILE\n\n", progname); + exit(status); +} + +int +main(int argc, const char *argv[]) { + FILE *fp, *ofp; + const char *fname, *ofname; + sauchar_t *T; + saidx_t *A; + LFS_OFF_T n; + size_t m; + saidx_t pidx; + clock_t start, finish; + saint_t err, blocksize, needclose = 3; + + /* Check arguments. */ + if((argc == 1) || + (strcmp(argv[1], "-h") == 0) || + (strcmp(argv[1], "--help") == 0)) { print_help(argv[0], EXIT_SUCCESS); } + if(argc != 3) { print_help(argv[0], EXIT_FAILURE); } + + /* Open a file for reading. */ + if(strcmp(argv[1], "-") != 0) { +#if HAVE_FOPEN_S + if(fopen_s(&fp, fname = argv[1], "rb") != 0) { +#else + if((fp = LFS_FOPEN(fname = argv[1], "rb")) == NULL) { +#endif + fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], fname); + perror(NULL); + exit(EXIT_FAILURE); + } + } else { +#if HAVE__SETMODE && HAVE__FILENO + if(_setmode(_fileno(stdin), _O_BINARY) == -1) { + fprintf(stderr, "%s: Cannot set mode: ", argv[0]); + perror(NULL); + exit(EXIT_FAILURE); + } +#endif + fp = stdin; + fname = "stdin"; + needclose ^= 1; + } + + /* Open a file for writing. */ + if(strcmp(argv[2], "-") != 0) { +#if HAVE_FOPEN_S + if(fopen_s(&ofp, ofname = argv[2], "wb") != 0) { +#else + if((ofp = LFS_FOPEN(ofname = argv[2], "wb")) == NULL) { +#endif + fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], ofname); + perror(NULL); + exit(EXIT_FAILURE); + } + } else { +#if HAVE__SETMODE && HAVE__FILENO + if(_setmode(_fileno(stdout), _O_BINARY) == -1) { + fprintf(stderr, "%s: Cannot set mode: ", argv[0]); + perror(NULL); + exit(EXIT_FAILURE); + } +#endif + ofp = stdout; + ofname = "stdout"; + needclose ^= 2; + } + + /* Read the blocksize. */ + if(read_int(fp, &blocksize) != 4) { + fprintf(stderr, "%s: Cannot read from `%s': ", argv[0], fname); + perror(NULL); + exit(EXIT_FAILURE); + } + + /* Allocate 5blocksize bytes of memory. */ + T = (sauchar_t *)malloc(blocksize * sizeof(sauchar_t)); + A = (saidx_t *)malloc(blocksize * sizeof(saidx_t)); + if((T == NULL) || (A == NULL)) { + fprintf(stderr, "%s: Cannot allocate memory.\n", argv[0]); + exit(EXIT_FAILURE); + } + + fprintf(stderr, "UnBWT (blocksize %" PRIdSAINT_T ") ... ", blocksize); + start = clock(); + for(n = 0; (m = read_int(fp, &pidx)) != 0; n += m) { + /* Read blocksize bytes of data. */ + if((m != 4) || ((m = fread(T, sizeof(sauchar_t), blocksize, fp)) == 0)) { + fprintf(stderr, "%s: %s `%s': ", + argv[0], + (ferror(fp) || !feof(fp)) ? "Cannot read from" : "Unexpected EOF in", + fname); + perror(NULL); + exit(EXIT_FAILURE); + } + + /* Inverse Burrows-Wheeler Transform. */ + if((err = inverse_bw_transform(T, T, A, m, pidx)) != 0) { + fprintf(stderr, "%s (reverseBWT): %s.\n", + argv[0], + (err == -1) ? "Invalid data" : "Cannot allocate memory"); + exit(EXIT_FAILURE); + } + + /* Write m bytes of data. */ + if(fwrite(T, sizeof(sauchar_t), m, ofp) != m) { + fprintf(stderr, "%s: Cannot write to `%s': ", argv[0], ofname); + perror(NULL); + exit(EXIT_FAILURE); + } + } + if(ferror(fp)) { + fprintf(stderr, "%s: Cannot read from `%s': ", argv[0], fname); + perror(NULL); + exit(EXIT_FAILURE); + } + finish = clock(); + fprintf(stderr, "%" PRIdOFF_T " bytes: %.4f sec\n", + n, (double)(finish - start) / (double)CLOCKS_PER_SEC); + + /* Close files */ + if(needclose & 1) { fclose(fp); } + if(needclose & 2) { fclose(ofp); } + + /* Deallocate memory. */ + free(A); + free(T); + + return 0; +} |