new zip entry with negative offsets

diff --git a/magic/Magdir/zip b/magic/Magdir/zip
new file mode 100644 (file)
index 0000000..17919a3
--- /dev/null
+++ b/magic/Magdir/zip
@@ -0,0 +1,63 @@
+#------------------------------------------------------------------------------
+# $File: zip,v 1.1 2017/11/03 23:36:17 christos Exp $
+# zip:  file(1) magic for zip files; this is not use
+# Note the version of magic in archive is currently stronger, this is
+# just an example until negative offsets are supported better
+
+# Zip Central Cirectory record
+0      name            zipcd
+>0     string          PK\001\002
+>>4    leshort         x               \b, made by
+>>4    use             zipversion
+>>6    leshort         x               \b, extract using at least
+>>6    use             zipversion
+>>12   ledate          x               \b, last modified %s
+>>24   lelong          >0              \b, uncompressed size %d
+>>10   leshort         x               \b, method=
+>>10   use             zipcompression
+
+# Zip known compressions
+0      name            zipcompression
+>0     leshort         0               \bstore
+>0     leshort         8               \bdeflate
+>0     leshort         9               \bdeflate64
+>0     leshort         12              \bbzip2
+>0     leshort         14              \blzma
+>0     leshort         94              \bMP3
+>0     leshort         95              \bxz
+>0     leshort         96              \bJpeg
+>0     leshort         97              \bWavPack
+>0     leshort         98              \bPPMd
+>0     leshort         99              \bAES Encrypted
+>0     default         x
+>>0    leshort         x               \b[%#x]
+
+# Zip known versions
+0      name            zipversion
+>0     leshort         0x09            v0.9
+>0     leshort         0x0a            v1.0
+>0     leshort         0x0b            v1.1
+>0     leshort         0x14            v2.0
+>0     leshort         0x15            v2.1
+>0     leshort         0x19            v2.5
+>0     leshort         0x1b            v2.7
+>0     leshort         0x2d            v4.5
+>0     leshort         0x2e            v4.6
+>0     leshort         0x32            v5.0
+>0     leshort         0x33            v5.1
+>0     leshort         0x34            v5.2
+>0     leshort         0x3d            v6.1
+>0     leshort         0x3e            v6.2
+>0     leshort         0x3f            v6.3
+>0     default         x
+>>0    leshort         x               v?[%#x]
+
+# Zip End Of Central Directory record
+-22    string          PK\005\006      Zip archive data
+#>4    leshort         >1              \b, %d disks
+#>6    leshort         >1              \b, central directory disk %d
+#>8    leshort         >1              \b, %d central directories on this disk
+#>10   leshort         >1              \b, %d central directories
+#>12   lelong          x               \b, %d central directory bytes
+>(16.l)        use             zipcd
+>20    pstring/l       >0              \b, %s