Rewrite code, but keeping the exact same semantic and behaviourHEADmain

- assert that the generated `siphash.o` code is identical to the
  original code, available at `tests/assert-identical.sh`;
- remove unneeded `#define`s;
- rewrite code with the correct indentation, spacing and formatting;
- use C99 constructs over C89 (for loop variable declarations inside
  the parentheses);
- fix the public API.

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/assert-identical.sh b/tests/assert-identical.sh
new file mode 100755
index 0000000..69fa5ff
--- /dev/null
+++ b/tests/assert-identical.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+set -eu
+
+NAME='siphash'
+CFLAGS='-O2'
+
+trap "rm -f tests/resources/impl.c src/impl.cmp.o tests/resources/impl.cmp.o" \
+	EXIT
+
+(
+cd src/
+gcc $CFLAGS -o impl.cmp.o -c impl.c
+strip impl.cmp.o
+) &
+
+(
+cd tests/resources/
+sed 's/^int siphash(/int siphash_impl(/' < "$NAME".c > impl.c
+gcc $CFLAGS -o impl.cmp.o -c impl.c
+strip impl.cmp.o
+) &
+
+wait
+
+cmp tests/resources/impl.cmp.o src/impl.cmp.o