Implement RFC 2: Initial integration of "GDAL SRS barn" work

This work mostly consists of:
- a C++ implementation of the ISO-19111:2018 / OGC Topic 2
  "Referencing by coordinates" classes to represent Datums,
  Coordinate systems, CRSs (Coordinate Reference Systems) and
  Coordinate Operations.
- methods to convert between this C++ modeling and WKT1, WKT2
  and PROJ string representations of those objects
- management and query of a SQLite3 database of CRS and Coordinate Operation definition
- a C API binding part of those capabilities

This is all-in-one squashed commit of the work of
https://github.com/OSGeo/proj.4/pull/1040

1 files changed, 17 insertions, 0 deletions

diff --git a/scripts/reformat.sh b/scripts/reformat.sh
new file mode 100755
index 00000000..c3826322
--- /dev/null
+++ b/scripts/reformat.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+set -eu
+
+# Refuse to reformat nn.hpp: this is third-party code
+if test $(basename $1) = "nn.hpp"; then
+    exit 0
+fi
+
+clang-format -style="{BasedOnStyle: llvm, IndentWidth: 4}"  $1 > $1.reformatted
+if diff -u $1.reformatted $1; then
+    # No reformatting: remove temporary file
+    rm $1.reformatted
+else
+    # Differences. Backup original file, and use reformatted file
+    cp $1 $1.before_reformat
+    mv $1.reformatted $1
+fi