/* This file is part of GNU tar.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright 2007, 2009, 2013-2014 Free Software Foundation, Inc.
Written by Sergey Poznyakoff.
const char *program;
};
-struct compression_suffix compression_suffixes[] = {
-#define S(s,p) #s, sizeof (#s) - 1, #p
- { S(gz, gzip) },
- { S(tgz, gzip) },
- { S(taz, gzip) },
- { S(Z, compress) },
- { S(taZ, compress) },
- { S(bz2, bzip2) },
- { S(tbz, bzip2) },
- { S(tbz2, bzip2) },
- { S(tz2, bzip2) },
- { S(lzma, lzma) },
- { S(tlz, lzma) },
+static struct compression_suffix compression_suffixes[] = {
+#define __CAT2__(a,b) a ## b
+#define S(s,p) #s, sizeof (#s) - 1, __CAT2__(p,_PROGRAM)
+ { "tar", 3, NULL },
+ { S(gz, GZIP) },
+ { S(tgz, GZIP) },
+ { S(taz, GZIP) },
+ { S(Z, COMPRESS) },
+ { S(taZ, COMPRESS) },
+ { S(bz2, BZIP2) },
+ { S(tbz, BZIP2) },
+ { S(tbz2, BZIP2) },
+ { S(tz2, BZIP2) },
+ { S(lz, LZIP) },
+ { S(lzma, LZMA) },
+ { S(tlz, LZMA) },
+ { S(lzo, LZOP) },
+ { S(xz, XZ) },
+ { S(txz, XZ) }, /* Slackware */
+ { NULL }
#undef S
+#undef __CAT2__
};
-int nsuffixes = sizeof (compression_suffixes) /
- sizeof (compression_suffixes[0]);
-
-static const char *
-find_compression_program (const char *name, const char *defprog)
+static struct compression_suffix const *
+find_compression_suffix (const char *name, size_t *ret_len)
{
char *suf = strrchr (name, '.');
-
+
if (suf)
{
- int i;
size_t len;
-
+ struct compression_suffix *p;
+
suf++;
len = strlen (suf);
- for (i = 0; i < nsuffixes; i++)
+ for (p = compression_suffixes; p->suffix; p++)
{
- if (compression_suffixes[i].length == len
- && memcmp (compression_suffixes[i].suffix, suf, len) == 0)
- return compression_suffixes[i].program;
+ if (p->length == len && memcmp (p->suffix, suf, len) == 0)
+ {
+ if (ret_len)
+ *ret_len = strlen (name) - len - 1;
+ return p;
+ }
}
}
+ return NULL;
+}
+
+static const char *
+find_compression_program (const char *name, const char *defprog)
+{
+ struct compression_suffix const *p = find_compression_suffix (name, NULL);
+ if (p)
+ return p->program;
return defprog;
}
void
-set_comression_program_by_suffix (const char *name, const char *defprog)
+set_compression_program_by_suffix (const char *name, const char *defprog)
{
const char *program = find_compression_program (name, defprog);
if (program)
use_compress_program_option = program;
}
+char *
+strip_compression_suffix (const char *name)
+{
+ char *s = NULL;
+ size_t len;
+
+ if (find_compression_suffix (name, &len))
+ {
+ if (strncmp (name + len - 4, ".tar", 4) == 0)
+ len -= 4;
+ if (len == 0)
+ return NULL;
+ s = xmalloc (len + 1);
+ memcpy (s, name, len);
+ s[len] = 0;
+ }
+ return s;
+}
+