From b35eb79705ea01d4d86722b2cdbe99c876f5cdcb Mon Sep 17 00:00:00 2001
From: "Thomas J. Kennedy" <tkennedy@cs.odu.edu>
Date: Sun, 19 Apr 2020 14:53:45 -0400
Subject: [PATCH] Add Rust Cleve Moler arbitrary precision example
---
.gitignore | 78 +++++++++++++------
.../FP-ErrorEstimate-Rust/Cargo.lock | 63 +++++++++++++++
.../FP-ErrorEstimate-Rust/Cargo.toml | 10 +++
.../FP-ErrorEstimate-Rust/src/main.rs | 21 +++++
4 files changed, 150 insertions(+), 22 deletions(-)
create mode 100644 FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.lock
create mode 100644 FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.toml
create mode 100644 FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/src/main.rs
diff --git a/.gitignore b/.gitignore
index 3597fdf..c530fdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,34 +1,68 @@
-# C++ ignore rules
+# General Ignore Rules
+**/documentation/
**.o
**.d
-
-# Java ignore rules
+**.exe
+**.zip
**.class
**.jar
-!**wrapper.jar
-
-# Python rules
+!**gradle/wrapper/*.jar
**.pyc
+**/docs
+# Binary Specific Ignore rules
+**/ll2
+**leak.out*
+**storage
+**runShapes
+**runshapes
+**updateRoom
+**registration
+**pointerReview
-# Gradle Ignore rules
-**/build
-**/.gradle
+**/build/
+**/.gradle/
-# Deploy Rules
-**.zip
+# Assignment Ignore Rules
+**Assignment-0*
-# Eclipse Project Rules
-**/.project
-**/.classpath
+# Eclipse Project Ignore Rules
+**.project
+**.settings
+**.classpath
+# Latex Ignore Rules
+**.aux
+
+# Scratch (temp) File & Directory Ignore rules
+Scratch
**.bak
-# Latex
-**.aux
-**.toc
-**.dvi
-**latexmk
-**.fls
-**.log
-**.out
+# Vim rules
+**.swp
+
+# Python Coverage (coverage.py) Rules
+**/.coverage
+**/htmlcov
+
+# Python Disttools
+MANIFEST
+
+# Python Tox
+**.tox
+
+# Style Check reports
+**style-check*
+
+# Rust
+**/target
+
+# output comparison
+**/out-Rust.txt
+**/out-rust.txt
+**/out-cpp.txt
+
+# Gcovr rules
+**/source/*.html
+**.gcda
+**.gcno
diff --git a/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.lock b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.lock
new file mode 100644
index 0000000..90f429f
--- /dev/null
+++ b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.lock
@@ -0,0 +1,63 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "az"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41a6b78289a33e09b00818ca8c90ab17c5dabb6e74f4b29a6de679c0e0886ade"
+
+[[package]]
+name = "fp-error-estimate"
+version = "0.1.0"
+dependencies = [
+ "rug",
+]
+
+[[package]]
+name = "gmp-mpfr-sys"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63d7f805cf9df081683d463f62864bda8b8e3ce7162a8e11cd0c49f27b8ce89b"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
+
+[[package]]
+name = "rug"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72315b6d9cb7d886fb99724330c47ceb29e923df657c31da3849fe88c0ded710"
+dependencies = [
+ "az",
+ "gmp-mpfr-sys",
+ "libc",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.toml b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.toml
new file mode 100644
index 0000000..e00f5ca
--- /dev/null
+++ b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "fp-error-estimate"
+version = "0.1.0"
+authors = ["Thomas J. Kennedy <tkennedy@cs.odu.edu>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rug = "1.8.0"
diff --git a/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/src/main.rs b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/src/main.rs
new file mode 100644
index 0000000..4e5eeac
--- /dev/null
+++ b/FPvsArbitraryPrecision/FP-ErrorEstimate-Rust/src/main.rs
@@ -0,0 +1,21 @@
+use rug::Float;
+
+
+fn cleve_moler(desired_precision: u32) -> Float {
+ let a = Float::with_val(desired_precision, 4.0)
+ / Float::with_val(desired_precision, 3.0);
+
+ let b = a - Float::with_val(desired_precision, 1.0);
+ let c = Float::with_val(desired_precision, &b + &b) + &b;
+
+ let one = Float::with_val(desired_precision, 1.0);
+
+ (c - one).abs()
+}
+
+fn main() {
+
+ for precision in 1..=1000 {
+ println!("{:>5} -> {}", precision, cleve_moler(precision));
+ }
+}
--
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