Cleaned up and added comparisons against established implementations

scripts/build_other_impls.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# This bash script will pull and compile the other implementations of the
+# bhmie algorithm (found at http://scatterlib.wikidot.com/mie)
+# These implementations will then be tested and benchmarked against the local
+# implementation to ensure that they are correct and (ideally) faster.
+
+# First, let's create a base URL for the scatterlib wiki codebases
+base_url="http://scatterlib.wikidot.com/local--files/codes/"
+
+# Next, let's create a list of the codebases we want to pull
+codebases=("bhmie-f.zip" "bhmie-c.zip")
+
+# Then, let's create a directory to pull the codebases to
+bhmie_dir=".bhmielibs"
+mkdir -p $bhmie_dir
+
+# Now, let's pull the codebases
+for codebase in ${codebases[@]}; do
+    wget -O $bhmie_dir/$codebase $base_url/$codebase
+    if [[ $codebase == *.zip ]]; then
+        unzip $bhmie_dir/$codebase -d $bhmie_dir/$codebase
+    fi
+done
+
+# Then, let's extract any .zip files to a directory of the same name (without the .zip, obviously)
+for codebase in ${codebases[@]}; do
+    if [[ $codebase == *.zip ]]; then
+        unzip $bhmie_dir/$codebase -d $bhmie_dir/${codebase%.zip}
+    fi
+done
+
+# If the folder already existed in the archive, move that folder one level up
+# and remove the now empty folder
+for codebase in ${codebases[@]}; do
+    if [[ $codebase == *.zip ]]; then
+        folder=${codebase%.zip}
+        if [ -d $bhmie_dir/$folder/$folder ]; then
+            mv $bhmie_dir/$folder/$folder/* $bhmie_dir/$folder
+            rmdir $bhmie_dir/$folder/$folder
+        fi
+    fi
+done
+
+# Next, if this has all succeeded we can delete the .zip files
+for codebase in ${codebases[@]}; do
+    if [[ $codebase == *.zip ]]; then
+        rm $bhmie_dir/$codebase
+    fi
+done
+
+# And, finally, we can compile the C, and Fortran implementations
+cd $bhmie_dir
+gcc -shared -fPIC -o bhmie-c/bhmie.so bhmie-c/bhmie.c bhmie-c/complex.c bhmie-c/nrutil.c -lm -Wno-builtin-declaration-mismatch -Wno-implicit-function-declaration
+gfortran -shared -fPIC -o bhmie-f/bhmie.so bhmie-f/bhmie.f
+gfortran -shared -fPIC -o bhmie-f/bhmie_f77.so bhmie-f/bhmie_f77.f