. "$BST_LIB"

# libb64 is a C base64 encode/decode library. The distro is static-only, so the
# port ships no shared object: the payload is the five b64 headers (-dev) and
# the static archive libb64.a (-staticdev). There is no on-target C compiler to
# link against it, so the on-target assertion is that the shipped payload is
# real -- every header present and carrying its own version guard and API
# declarations, and the archive carrying both compiled members plus every
# exported base64_* symbol in its index. That symbol index is what distinguishes
# a wasm32 compile that actually produced the library from an empty stub.

inc=/usr/include/b64
lib=/usr/lib/libb64.a

for h in ccommon cdecode cencode decode encode; do
  check "libb64/$h-present" test -f "$inc/$h.h"
done

# Version guards: ccommon carries the 2.0 library version, and each C header its
# own encoder/decoder version.
check_out libb64/ccommon-version "define BASE64_VER_MAJOR"      cat "$inc/ccommon.h"
check_out libb64/cencode-version "define BASE64_CENC_VER_MAJOR" cat "$inc/cencode.h"
check_out libb64/cdecode-version "define BASE64_CDEC_VER_MAJOR" cat "$inc/cdecode.h"

# The declared C API and its state structs, so a truncated header is caught.
check_out libb64/cencode-api   "base64_encode_block"  cat "$inc/cencode.h"
check_out libb64/cencode-state "base64_encodestate"   cat "$inc/cencode.h"
check_out libb64/cdecode-api   "base64_decode_block"  cat "$inc/cdecode.h"
check_out libb64/cdecode-state "base64_decodestate"   cat "$inc/cdecode.h"

# The two C++ wrapper headers ship alongside the C ones (unusable on this image
# -- no C++ standard library -- but part of the package's payload).
check_out libb64/cxx-namespace "namespace base64" cat "$inc/encode.h"
check_out libb64/encode-cxx    "struct encoder"   cat "$inc/encode.h"
check_out libb64/decode-cxx    "struct decoder"   cat "$inc/decode.h"

check     libb64/lib-present  test -f "$lib"
check     libb64/lib-nonempty test -s "$lib"
check_out libb64/lib-archive  "!<arch>" head -c 8 "$lib"

# Flatten the archive to printable text once: GNU grep suppresses matches inside
# binary data, and busybox tr does not handle [:print:] under -c, so the octal
# range is the formulation both greps and both trs agree on.
flat=${TMPDIR:-/tmp}/bst-libb64.$$
tr -c '\40-\176\n' ' ' < "$lib" > "$flat" 2>/dev/null

check libb64/lib-cencode grep -q cencode.o "$flat"
check libb64/lib-cdecode grep -q cdecode.o "$flat"

for s in init_encodestate encode_block encode_blockend encode_value \
         encode_length init_decodestate decode_block decode_value \
         decode_maxlength; do
  check "libb64/sym-$s" grep -q "base64_$s" "$flat"
done

rm -f "$flat"