update mod

vendor/github.com/cloudflare/golz4/.gitignore

@@ -0,0 +1,22 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe

vendor/github.com/cloudflare/golz4/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2013 CloudFlare, Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+* Neither the name of the CloudFlare, Inc. nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/cloudflare/golz4/Makefile

@@ -0,0 +1,14 @@
+GCFLAGS := 
+LDFLAGS :=
+
+.PHONY: install
+install:
+	@go install -v .
+
+.PHONY: test
+test:
+	@go test -gcflags='$(GCFLAGS)' -ldflags='$(LDFLAGS)' .
+
+.PHONY: bench
+bench:
+	@go test -gcflags='$(GCFLAGS)' -ldflags='$(LDFLAGS)' -bench .

vendor/github.com/cloudflare/golz4/README.md

@@ -0,0 +1,4 @@
+golz4
+=====
+
+Golang interface to LZ4 compression

vendor/github.com/cloudflare/golz4/doc.go

@@ -0,0 +1,4 @@
+// Package lz4 implements compression using lz4.c and lz4hc.c
+//
+// Copyright (c) 2013 CloudFlare, Inc.
+package lz4

vendor/github.com/cloudflare/golz4/lz4.go

@@ -0,0 +1,55 @@
+package lz4
+
+// #cgo CFLAGS: -O3
+// #include "src/lz4.h"
+// #include "src/lz4.c"
+import "C"
+
+import (
+	"errors"
+	"fmt"
+	"unsafe"
+)
+
+// p gets a char pointer to the first byte of a []byte slice
+func p(in []byte) *C.char {
+	if len(in) == 0 {
+		return (*C.char)(unsafe.Pointer(nil))
+	}
+	return (*C.char)(unsafe.Pointer(&in[0]))
+}
+
+// clen gets the length of a []byte slice as a char *
+func clen(s []byte) C.int {
+	return C.int(len(s))
+}
+
+// Uncompress with a known output size. len(out) should be equal to
+// the length of the uncompressed out.
+func Uncompress(in, out []byte) (error) {
+	if int(C.LZ4_decompress_safe(p(in), p(out), clen(in), clen(out))) < 0 {
+		return errors.New("Malformed compression stream")
+	}
+
+	return nil
+}
+
+// CompressBound calculates the size of the output buffer needed by
+// Compress. This is based on the following macro:
+//
+// #define LZ4_COMPRESSBOUND(isize)
+//      ((unsigned int)(isize) > (unsigned int)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
+func CompressBound(in []byte) int {
+	return len(in) + ((len(in) / 255) + 16)
+}
+
+// Compress compresses in and puts the content in out. len(out)
+// should have enough space for the compressed data (use CompressBound
+// to calculate). Returns the number of bytes in the out slice.
+func Compress(in, out []byte) (outSize int, err error) {
+	outSize = int(C.LZ4_compress_limitedOutput(p(in), p(out), clen(in), clen(out)))
+	if outSize == 0 {
+		err = fmt.Errorf("insufficient space for compression")
+	}
+	return
+}

vendor/github.com/cloudflare/golz4/lz4_hc.go

@@ -0,0 +1,38 @@
+package lz4
+
+// #cgo CFLAGS: -O3
+// #include "src/lz4hc.h"
+// #include "src/lz4hc.c"
+import "C"
+
+import (
+	"fmt"
+)
+
+// CompressHC compresses in and puts the content in out. len(out)
+// should have enough space for the compressed data (use CompressBound
+// to calculate). Returns the number of bytes in the out slice. Determines
+// the compression level automatically.
+func CompressHC(in, out []byte) (int, error) {
+	// 0 automatically sets the compression level.
+	return CompressHCLevel(in, out, 0)
+}
+
+// CompressHCLevel compresses in at the given compression level and puts the
+// content in out. len(out) should have enough space for the compressed data
+// (use CompressBound to calculate). Returns the number of bytes in the out
+// slice. To automatically choose the compression level, use 0. Otherwise, use
+// any value in the inclusive range 1 (worst) through 16 (best). Most
+// applications will prefer CompressHC.
+func CompressHCLevel(in, out []byte, level int) (outSize int, err error) {
+	// LZ4HC does not handle empty buffers. Pass through to Compress.
+	if len(in) == 0 || len(out) == 0 {
+		return Compress(in, out)
+	}
+
+	outSize = int(C.LZ4_compressHC2_limitedOutput(p(in), p(out), clen(in), clen(out), C.int(level)))
+	if outSize == 0 {
+		err = fmt.Errorf("insufficient space for compression")
+	}
+	return
+}

vendor/github.com/cloudflare/golz4/sample.txt

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+CANTO I
+
+
+IN the midway of this our mortal life,
+I found me in a gloomy wood, astray
+Gone from the path direct: and e'en to tell
+It were no easy task, how savage wild
+That forest, how robust and rough its growth,
+Which to remember only, my dismay
+Renews, in bitterness not far from death.
+Yet to discourse of what there good befell,
+All else will I relate discover'd there.
+How first I enter'd it I scarce can say,
+Such sleepy dullness in that instant weigh'd
+My senses down, when the true path I left,
+But when a mountain's foot I reach'd, where clos'd
+The valley, that had pierc'd my heart with dread,
+I look'd aloft, and saw his shoulders broad
+Already vested with that planet's beam,
+Who leads all wanderers safe through every way.
+
+Then was a little respite to the fear,
+That in my heart's recesses deep had lain,
+All of that night, so pitifully pass'd:
+And as a man, with difficult short breath,
+Forespent with toiling, 'scap'd from sea to shore,
+Turns to the perilous wide waste, and stands
+At gaze; e'en so my spirit, that yet fail'd
+Struggling with terror, turn'd to view the straits,
+That none hath pass'd and liv'd.  My weary frame
+After short pause recomforted, again
+I journey'd on over that lonely steep,
+
+The hinder foot still firmer.  Scarce the ascent
+Began, when, lo! a panther, nimble, light,
+And cover'd with a speckled skin, appear'd,
+Nor, when it saw me, vanish'd, rather strove
+To check my onward going; that ofttimes
+With purpose to retrace my steps I turn'd.
+
+The hour was morning's prime, and on his way
+Aloft the sun ascended with those stars,
+That with him rose, when Love divine first mov'd
+Those its fair works: so that with joyous hope
+All things conspir'd to fill me, the gay skin
+Of that swift animal, the matin dawn
+And the sweet season.  Soon that joy was chas'd,
+And by new dread succeeded, when in view
+A lion came, 'gainst me, as it appear'd,
+
+With his head held aloft and hunger-mad,
+That e'en the air was fear-struck.  A she-wolf
+Was at his heels, who in her leanness seem'd
+Full of all wants, and many a land hath made
+Disconsolate ere now.  She with such fear
+O'erwhelmed me, at the sight of her appall'd,
+That of the height all hope I lost.  As one,
+Who with his gain elated, sees the time
+When all unwares is gone, he inwardly
+Mourns with heart-griping anguish; such was I,
+Haunted by that fell beast, never at peace,
+Who coming o'er against me, by degrees
+Impell'd me where the sun in silence rests.
+
+While to the lower space with backward step
+I fell, my ken discern'd the form one of one,
+Whose voice seem'd faint through long disuse of speech.
+When him in that great desert I espied,
+"Have mercy on me!" cried I out aloud,
+"Spirit! or living man! what e'er thou be!"
+
+He answer'd: "Now not man, man once I was,
+And born of Lombard parents, Mantuana both
+By country, when the power of Julius yet
+Was scarcely firm.  At Rome my life was past
+Beneath the mild Augustus, in the time
+Of fabled deities and false.  A bard
+Was I, and made Anchises' upright son
+The subject of my song, who came from Troy,
+When the flames prey'd on Ilium's haughty towers.
+But thou, say wherefore to such perils past
+Return'st thou?  wherefore not this pleasant mount
+Ascendest, cause and source of all delight?"
+"And art thou then that Virgil, that well-spring,
+From which such copious floods of eloquence
+Have issued?"  I with front abash'd replied.
+"Glory and light of all the tuneful train!
+May it avail me that I long with zeal
+Have sought thy volume, and with love immense
+Have conn'd it o'er.  My master thou and guide!
+Thou he from whom alone I have deriv'd
+That style, which for its beauty into fame
+Exalts me.  See the beast, from whom I fled.
+O save me from her, thou illustrious sage!"
+
+"For every vein and pulse throughout my frame
+She hath made tremble."  He, soon as he saw
+That I was weeping, answer'd, "Thou must needs
+Another way pursue, if thou wouldst 'scape
+From out that savage wilderness.  This beast,
+At whom thou criest, her way will suffer none
+To pass, and no less hindrance makes than death:
+So bad and so accursed in her kind,
+That never sated is her ravenous will,
+Still after food more craving than before.
+To many an animal in wedlock vile
+She fastens, and shall yet to many more,
+Until that greyhound come, who shall destroy
+Her with sharp pain.  He will not life support
+By earth nor its base metals, but by love,
+Wisdom, and virtue, and his land shall be
+The land 'twixt either Feltro.  In his might
+Shall safety to Italia's plains arise,
+For whose fair realm, Camilla, virgin pure,
+Nisus, Euryalus, and Turnus fell.
+He with incessant chase through every town
+Shall worry, until he to hell at length
+Restore her, thence by envy first let loose.
+I for thy profit pond'ring now devise,
+That thou mayst follow me, and I thy guide
+Will lead thee hence through an eternal space,
+Where thou shalt hear despairing shrieks, and see
+Spirits of old tormented, who invoke
+A second death; and those next view, who dwell
+Content in fire, for that they hope to come,
+Whene'er the time may be, among the blest,
+Into whose regions if thou then desire
+T' ascend, a spirit worthier then I
+Must lead thee, in whose charge, when I depart,
+Thou shalt be left: for that Almighty King,
+Who reigns above, a rebel to his law,
+Adjudges me, and therefore hath decreed,
+That to his city none through me should come.
+He in all parts hath sway; there rules, there holds
+His citadel and throne.  O happy those,
+Whom there he chooses!"  I to him in few:
+"Bard! by that God, whom thou didst not adore,
+I do beseech thee (that this ill and worse
+I may escape) to lead me, where thou saidst,
+That I Saint Peter's gate may view, and those
+Who as thou tell'st, are in such dismal plight."
+
+Onward he mov'd, I close his steps pursu'd.