BSD 4_4_Lite1 development

Work on file usr/src/contrib/file-3.12/Magdir/compress

Synthesized-from: CSRG/cd2/4.4BSD-Lite1

diff --git a/usr/src/contrib/file-3.12/Magdir/compress b/usr/src/contrib/file-3.12/Magdir/compress
new file mode 100644 (file)
index 0000000..b57ddd9
--- /dev/null
+++ b/usr/src/contrib/file-3.12/Magdir/compress
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+#
+# Formats for various forms of compressed data
+# Formats for "compress" proper have been moved into "compress.c",
+# because it tries to uncompress it to figure out what's inside.
+
+# According to gzip.h, this is the correct byte order for packed data.
+#
+0      string          \037\036        packed data
+
+#
+# This magic number is byte-order-independent.
+#
+0      short           017437          old packed data
+
+#
+# XXX - why *two* entries for "compacted data", one of which is
+# byte-order independent, and one of which is byte-order dependent?
+#
+0      short           0x1fff          compacted data
+0      string          \377\037        compacted data
+0      short           0145405         huf output
+#
+# Squeeze and Crunch...
+# These numbers were gleaned from the Unix versions of the programs to
+# handle these formats.  Note that I can only uncrunch, not crunch, and
+# I didn't have a crunched file handy, so the crunch number is untested.
+#                              Keith Waclena <keith@cerberus.uchicago.edu>
+0      leshort         0x76FF          squeezed data (CP/M, DOS)
+0      leshort         0x76FE          crunched data (CP/M, DOS)
+# Freeze
+0      string          \037\237        Frozen file 2.1
+0      string          \037\236        Frozen file 1.0 (or gzip 0.5)
+#
+# Standard unix compress
+#
+0      string          \037\235        compressed data
+>2     byte&0x80       >0              block compressed
+>2     byte&0x1f       x               %d bits