--- /dev/null
+#include "pysam.h"
+
+/* The MIT License
+
+ Copyright (c) 2008 Broad Institute / Massachusetts Institute of Technology
+
+ 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.
+*/
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/select.h>
+#include <sys/stat.h>
+#include "bgzf.h"
+
+static const int WINDOW_SIZE = 64 * 1024;
+
+static int bgzip_main_usage()
+{
+ fprintf(pysamerr, "\n");
+ fprintf(pysamerr, "Usage: bgzip [options] [file] ...\n\n");
+ fprintf(pysamerr, "Options: -c write on standard output, keep original files unchanged\n");
+ fprintf(pysamerr, " -d decompress\n");
+ fprintf(pysamerr, " -f overwrite files without asking\n");
+ fprintf(pysamerr, " -b INT decompress at virtual file pointer INT\n");
+ fprintf(pysamerr, " -s INT decompress INT bytes in the uncompressed file\n");
+ fprintf(pysamerr, " -h give this help\n");
+ fprintf(pysamerr, "\n");
+ return 1;
+}
+
+static int write_open(const char *fn, int is_forced)
+{
+ int fd = -1;
+ char c;
+ if (!is_forced) {
+ if ((fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0666)) < 0 && errno == EEXIST) {
+ fprintf(pysamerr, "[bgzip] %s already exists; do you wish to overwrite (y or n)? ", fn);
+ scanf("%c", &c);
+ if (c != 'Y' && c != 'y') {
+ fprintf(pysamerr, "[bgzip] not overwritten\n");
+ exit(1);
+ }
+ }
+ }
+ if (fd < 0) {
+ if ((fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
+ fprintf(pysamerr, "[bgzip] %s: Fail to write\n", fn);
+ exit(1);
+ }
+ }
+ return fd;
+}
+
+static void fail(BGZF* fp)
+{
+ fprintf(pysamerr, "Error: %s\n", fp->error);
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int c, compress, pstdout, is_forced;
+ BGZF *fp;
+ void *buffer;
+ long start, end, size;
+
+ compress = 1; pstdout = 0; start = 0; size = -1; end = -1; is_forced = 0;
+ while((c = getopt(argc, argv, "cdhfb:s:")) >= 0){
+ switch(c){
+ case 'h': return bgzip_main_usage();
+ case 'd': compress = 0; break;
+ case 'c': pstdout = 1; break;
+ case 'b': start = atol(optarg); break;
+ case 's': size = atol(optarg); break;
+ case 'f': is_forced = 1; break;
+ }
+ }
+ if (size >= 0) end = start + size;
+ if (end >= 0 && end < start) {
+ fprintf(pysamerr, "[bgzip] Illegal region: [%ld, %ld]\n", start, end);
+ return 1;
+ }
+ if (compress == 1) {
+ struct stat sbuf;
+ int f_src = fileno(stdin);
+ int f_dst = fileno(stdout);
+
+ if ( argc>optind )
+ {
+ if ( stat(argv[optind],&sbuf)<0 )
+ {
+ fprintf(pysamerr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
+ return 1;
+ }
+
+ if ((f_src = open(argv[optind], O_RDONLY)) < 0) {
+ fprintf(pysamerr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
+ return 1;
+ }
+
+ if (pstdout)
+ f_dst = fileno(stdout);
+ else
+ {
+ char *name = malloc(strlen(argv[optind]) + 5);
+ strcpy(name, argv[optind]);
+ strcat(name, ".gz");
+ f_dst = write_open(name, is_forced);
+ if (f_dst < 0) return 1;
+ free(name);
+ }
+ }
+ else if (!pstdout && isatty(fileno((FILE *)stdout)) )
+ return bgzip_main_usage();
+
+ fp = bgzf_fdopen(f_dst, "w");
+ buffer = malloc(WINDOW_SIZE);
+ while ((c = read(f_src, buffer, WINDOW_SIZE)) > 0)
+ if (bgzf_write(fp, buffer, c) < 0) fail(fp);
+ // f_dst will be closed here
+ if (bgzf_close(fp) < 0) fail(fp);
+ if (argc > optind && !pstdout) unlink(argv[optind]);
+ free(buffer);
+ close(f_src);
+ return 0;
+ } else {
+ struct stat sbuf;
+ int f_dst;
+
+ if ( argc>optind )
+ {
+ if ( stat(argv[optind],&sbuf)<0 )
+ {
+ fprintf(pysamerr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
+ return 1;
+ }
+ char *name;
+ int len = strlen(argv[optind]);
+ if ( strcmp(argv[optind]+len-3,".gz") )
+ {
+ fprintf(pysamerr, "[bgzip] %s: unknown suffix -- ignored\n", argv[optind]);
+ return 1;
+ }
+ fp = bgzf_open(argv[optind], "r");
+ if (fp == NULL) {
+ fprintf(pysamerr, "[bgzip] Could not open file: %s\n", argv[optind]);
+ return 1;
+ }
+
+ if (pstdout) {
+ f_dst = fileno(stdout);
+ }
+ else {
+ name = strdup(argv[optind]);
+ name[strlen(name) - 3] = '\0';
+ f_dst = write_open(name, is_forced);
+ free(name);
+ }
+ }
+ else if (!pstdout && isatty(fileno((FILE *)stdin)) )
+ return bgzip_main_usage();
+ else
+ {
+ f_dst = fileno(stdout);
+ fp = bgzf_fdopen(fileno(stdin), "r");
+ if (fp == NULL) {
+ fprintf(pysamerr, "[bgzip] Could not read from stdin: %s\n", strerror(errno));
+ return 1;
+ }
+ }
+ buffer = malloc(WINDOW_SIZE);
+ if (bgzf_seek(fp, start, SEEK_SET) < 0) fail(fp);
+ while (1) {
+ if (end < 0) c = bgzf_read(fp, buffer, WINDOW_SIZE);
+ else c = bgzf_read(fp, buffer, (end - start > WINDOW_SIZE)? WINDOW_SIZE:(end - start));
+ if (c == 0) break;
+ if (c < 0) fail(fp);
+ start += c;
+ write(f_dst, buffer, c);
+ if (end >= 0 && start >= end) break;
+ }
+ free(buffer);
+ if (bgzf_close(fp) < 0) fail(fp);
+ if (!pstdout) unlink(argv[optind]);
+ return 0;
+ }
+}
projects / pysam.git / blobdiff