[add] deps/hdr_histogram subtree: simplified project structure with the minimum required files

Author: filipecosta90

deps/hdr_histogram/.github/workflows/ci.yml

@@ -1,78 +1,10 @@
-HdrHistogram_c: 'C' port of High Dynamic Range (HDR) Histogram
+HdrHistogram_c v0.11.0
 
-HdrHistogram
 ----------------------------------------------
 
-[![Gitter chat](https://badges.gitter.im/HdrHistogram/HdrHistogram.png)](https://gitter.im/HdrHistogram/HdrHistogram)
+This port contains a subset of the 'C' version of High Dynamic Range (HDR) Histogram available at [github.com/HdrHistogram/HdrHistogram_c](https://github.com/HdrHistogram/HdrHistogram_c).
 
-This port contains a subset of the functionality supported by the Java
-implementation.  The current supported features are:
 
-* Standard histogram with 64 bit counts (32/16 bit counts not supported)
-* All iterator types (all values, recorded, percentiles, linear, logarithmic)
-* Histogram serialisation (encoding version 1.2, decoding 1.0-1.2)
-* Reader/writer phaser and interval recorder
-
-Features not supported, but planned
-
-* Auto-resizing of histograms
-
-Features unlikely to be implemented
-
-* Double histograms
-* Atomic/Concurrent histograms
-* 16/32 bit histograms
-
-# Simple Tutorial
-
-## Recording values
-
-```C
-#include <hdr_histogram.h>
-
-struct hdr_histogram* histogram;
-
-// Initialise the histogram
-hdr_init(
-    1,  // Minimum value
-    INT64_C(3600000000),  // Maximum value
-    3,  // Number of significant figures
-    &histogram)  // Pointer to initialise
-
-// Record value
-hdr_record_value(
-    histogram,  // Histogram to record to
-    value)  // Value to record
-
-// Record value n times
-hdr_record_values(
-    histogram,  // Histogram to record to
-    value,  // Value to record
-    10)  // Record value 10 times
-
-// Record value with correction for co-ordinated omission.
-hdr_record_corrected_value(
-    histogram,  // Histogram to record to
-    value,  // Value to record
-    1000)  // Record with expected interval of 1000.
-
-// Print out the values of the histogram
-hdr_percentiles_print(
-    histogram,
-    stdout,  // File to write to
-    5,  // Granularity of printed values
-    1.0,  // Multiplier for results
-    CLASSIC);  // Format CLASSIC/CSV supported.
-```
-
-## More examples
-
-For more detailed examples of recording and logging results look at the
-[hdr_decoder](examples/hdr_decoder.c)
-and [hiccup](examples/hiccup.c)
-examples.  You can run hiccup and decoder
-and pipe the results of one into the other.
-
-```
-$ ./examples/hiccup | ./examples/hdr_decoder
-```
+The code present on `hdr_histogram.c`, `hdr_histogram.h`, and `hdr_atomic.c` was Written by Gil Tene, Michael Barker,
+and Matt Warren, and released to the public domain, as explained at
+http://creativecommons.org/publicdomain/zero/1.0/.

deps/hdr_histogram/.gitignore

@@ -0,0 +1,101 @@
+/**
+ * Copyright (c) 2012, 2013, 2014 Gil Tene
+ * Copyright (c) 2014 Michael Barker
+ * Copyright (c) 2014 Matt Warren
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 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.
+ */
+
+#include <sys/isa_defs.h>
+# include <sys/byteorder.h>
+
+# define betoh16(x) BE_16(x)
+# define letoh16(x) LE_16(x)
+# define betoh32(x) BE_32(x)
+# define letoh32(x) LE_32(x)
+# define betoh64(x) BE_64(x)
+# define letoh64(x) LE_64(x)
+#define htobe16(x) BE_16(x)
+#define be16toh(x) BE_16(x)
+#define htobe32(x) BE_32(x)
+#define be32toh(x) BE_32(x)
+#define htobe64(x) BE_64(x)
+#define be64toh(x) BE_64(x)
+// Solaris defines endian by setting _LITTLE_ENDIAN or _BIG_ENDIAN
+# ifdef _BIG_ENDIAN
+#  define IS_BIG_ENDIAN
+# endif
+# ifdef _LITTLE_ENDIAN
+#  define IS_LITTLE_ENDIAN
+# endif
+// Make sure we got some kind of endian (but not both)
+#if defined(IS_BIG_ENDIAN) == defined(IS_LITTLE_ENDIAN)
+# error "Failed to get endian type for this system"
+#endif
+
+// Define bswap functions if we didn't get any from the system headers
+#ifndef BSWAP_16
+# define BSWAP_16(x) ( \
+                    ((uint16_t)(x) & 0x00ffU) << 8 | \
+                    ((uint16_t)(x) & 0xff00U) >> 8)
+#endif
+#ifndef BSWAP_32
+# define BSWAP_32(x) ( \
+                    ((uint32_t)(x) & 0x000000ffU) << 24 | \
+                    ((uint32_t)(x) & 0x0000ff00U) << 8 | \
+                    ((uint32_t)(x) & 0x00ff0000U) >> 8 | \
+                    ((uint32_t)(x) & 0xff000000U) >> 24)
+#endif
+#ifndef BSWAP_64
+# define BSWAP_64(x) ( \
+                    ((uint64_t)(x) & 0x00000000000000ffULL) << 56 | \
+                    ((uint64_t)(x) & 0x000000000000ff00ULL) << 40 | \
+                    ((uint64_t)(x) & 0x0000000000ff0000ULL) << 24 | \
+                    ((uint64_t)(x) & 0x00000000ff000000ULL) << 8 | \
+                    ((uint64_t)(x) & 0x000000ff00000000ULL) >> 8 | \
+                    ((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24 | \
+                    ((uint64_t)(x) & 0x00ff000000000000ULL) >> 40 | \
+                    ((uint64_t)(x) & 0xff00000000000000ULL) >> 56)
+#endif
+
+// Define conversion functions if we didn't get any from the system headers
+#ifndef BE_16
+// Big endian system, swap when converting to/from little endian
+# if defined IS_BIG_ENDIAN
+#  define BE_16(x) (x)
+#  define BE_32(x) (x)
+#  define BE_64(x) (x)
+#  define LE_16(x) BSWAP_16(x)
+#  define LE_32(x) BSWAP_32(x)
+#  define LE_64(x) BSWAP_64(x)
+// Little endian system, swap when converting to/from big endian
+# elif defined IS_LITTLE_ENDIAN
+#  define BE_16(x) BSWAP_16(x)
+#  define BE_32(x) BSWAP_32(x)
+#  define BE_64(x) BSWAP_64(x)
+#  define LE_16(x) (x)
+#  define LE_32(x) (x)
+#  define LE_64(x) (x)
+#endif
+#endif