1 files changed, 120 insertions, 0 deletions
diff --git a/src/compression.c b/src/compression.c
new file mode 100644
index 0000000..cd1028c
--- /dev/null
+++ b/src/compression.c
@@ -0,0 +1,120 @@
+/*
+ * compression.c: code to find decompressor / compression extension
+ *  
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Sat Aug 20 15:01:02 BST 1994  Wilf. (G.Wilford@ee.surrey.ac.uk) 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdio.h>
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "error.h"
+#include "pipeline.h"
+
+/* Take filename as arg, return structure containing decompressor 
+   and extension, or NULL if no comp extension found. 
+   If want_stem, set comp->stem to the filename without extension, which
+   the caller should free.
+
+   eg.
+   	filename = /usr/man/man1/foo.1.gz 
+
+	comp->prog = "/usr/bin/gzip -dc";
+   	comp->ext = "gz";
+   	comp->stem = "/usr/man/man1/foo.1";
+ */
+struct compression *comp_info (const char *filename, int want_stem)
+{
+	const char *ext;
+	static struct compression hpux_comp = {GUNZIP " -S \"\"", "", NULL};
+
+	ext = strrchr (filename, '.');
+
+	if (ext) {
+		struct compression *comp;
+		for (comp = comp_list; comp->ext; comp++) {
+			if (strcmp (comp->ext, ext + 1) == 0) {
+				if (want_stem)
+					comp->stem = xstrndup (filename,
+							       ext - filename);
+				else
+					comp->stem = NULL;
+				return comp;
+			}
+		}
+	}
+
+	if (*GUNZIP) {
+		ext = strstr (filename, ".Z/");
+		if (ext) {
+			if (want_stem)
+				hpux_comp.stem = xstrndup (filename,
+							   ext - filename);
+			else
+				hpux_comp.stem = NULL;
+			return &hpux_comp;
+		}
+	}
+
+	return NULL;
+}
+
+/* take filename w/o comp ext. as arg, return comp->stem as a relative
+   compressed file or NULL if none found */
+struct compression *comp_file (const char *filename)
+{
+	size_t len;
+	char *compfile;
+	struct compression *comp;
+
+	compfile = xasprintf ("%s.", filename);
+	len = strlen (compfile);
+	
+	for (comp = comp_list; comp->ext; comp++) {
+		struct stat buf;
+		
+		compfile = appendstr (compfile, comp->ext, (void *) 0);
+
+		if (stat (compfile, &buf) == 0) {
+			comp->stem = compfile;
+			return comp;
+		}
+
+		*(compfile + len) = '\0';
+	}
+	free (compfile);
+	return NULL;
+}