#!/bin/bash
# Copyright 2026 Skal (pascal.massimino@gmail.com). All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the COPYING file in the root of the source
# tree.
# Decodes every file in 14 output/scaling modes. Point ASAN_DWEBP at a
# sanitizer build. The files tagged 'slow' allocate over a gigabyte, so each
# is decoded once rather than in every mode. Every file with an animation column is decoded
# again through anim_dump, which is the only way the demuxer, the frame
# composition and the blending get run at all; it is looked for beside
# $ASAN_DWEBP, where the build puts it.
D=${ASAN_DWEBP:-$(command -v dwebp)}
if [ ! -x "$D" ]; then
  echo "set \$ASAN_DWEBP to a sanitizer-built dwebp" >&2
  exit 2
fi
A=${ASAN_ANIM_DUMP:-$(dirname "$D")/anim_dump}
export ASAN_OPTIONS=${ASAN_OPTIONS:-detect_leaks=0}
slow=$(awk -F'|' '$3=="slow"{print $1}' expected.txt)
anim=$(awk -F'|' '$4!=""{print $1}' expected.txt)
bad=0; n=0
while read -r opt; do
  for f in files/*.webp; do
    skip=
    for s in $slow; do [ "$(basename "$f" .webp)" = "$s" ] && skip=1; done
    [ -n "$skip" ] && continue
    out=$($D -quiet $opt "$f" -o /dev/null 2>&1); n=$((n+1))
    echo "$out" | grep -q AddressSanitizer && {
      echo "ASAN $(basename "$f") [$opt]"; echo "$out" | head -3; bad=1; }
  done
done <<'OPTS'
-pam
-ppm
-pgm
-bmp
-alpha
-alpha_dither -pam
-incremental -pam
-incremental -mt -pam
-mt -pam
-nofancy -pgm
-crop 0 0 1 1 -pam
-resize 5 7 -pam
-incremental -resize 3 3 -pam
-dither 100 -alpha_dither -pam
OPTS
for s in $slow; do
  out=$($D -quiet -pam "files/$s.webp" -o /dev/null 2>&1); n=$((n+1))
  echo "$out" | grep -q AddressSanitizer && { echo "ASAN $s"; bad=1; }
done
if [ -x "$A" ]; then
  TMP=$(mktemp -d); trap 'rm -rf "$TMP"' EXIT
  for s in $anim; do
    for opt in -pam -tiff; do
      out=$($A -folder "$TMP" $opt "files/$s.webp" 2>&1); n=$((n+1))
      echo "$out" | grep -q AddressSanitizer && {
        echo "ASAN $s [anim_dump $opt]"; echo "$out" | head -3; bad=1; }
    done
  done
elif [ -n "$anim" ]; then
  echo "NOTE no anim_dump beside $D, so the animations went unswept"
fi
echo "asan sweep: $n decodes, failures=$bad"
exit $bad