#!/bin/sh

prefix=/usr/local
exec_prefix=${prefix}

nofile=
flush=
nocallers=
nomarkdirty=
compress=

usage() {
cat << EOF
usage: cairo-trace [--no-file] command
cairo-trace will generate a log of all calls made by command to
cairo. This log will be stored in a file in the local directory
called command.pid.trace.
Whatever else happens is driven by its argument:
  --flush         - Flush the output trace after every call.
  --no-file       - Disable the creation of an output file. Outputs to the
                    terminal instead.
  --no-callers    - Do not lookup the caller address/symbol/line whilst tracing.
  --mark-dirty    - Record image data for cairo_mark_dirty() [default]
  --no-mark-dirty - Do not record image data for cairo_mark_dirty()
  --compress      - Compress the output with LZMA
  --profile       - Combine --no-callers and --no-mark-dirty and --compress

Enviroment variables understood by cairo-trace:
  CAIRO_TRACE_FLUSH - flush the output after every function call.
  CAIRO_TRACE_LINE_INFO - emit line information for most function calls.
EOF
exit
}

skip=1
while test $skip -eq 1; do
    skip=0
    case $1 in
    --flush)
	skip=1
	flush=1
	;;
    --no-file)
	skip=1
	nofile=1
	;;
    --no-callers)
	skip=1
	nocallers=1
	;;
    --mark-dirty)
	skip=1
	nomarkdirty=
	;;
    --no-mark-dirty)
	skip=1
	nomarkdirty=1
	;;
    --compress)
	skip=1
	compress=1
	nofile=1
	;;
    --profile)
	skip=1
	compress=1
	nomarkdirty=1
	nocallers=1
	nofile=1
	;;
    --version)
	echo "cairo-trace, version 1.10.2."
	exit
	;;
    --help)
	usage
	;;
    esac
    if test $skip -eq 1; then
	shift
    fi
done

if test $# -eq 0; then
    usage
fi

CAIRO_TRACE_PROG_NAME="$1"
export CAIRO_TRACE_PROG_NAME

if test "x$CAIRO_TRACE_SO" = "x"; then
    CAIRO_TRACE_SO=""
    for lib in ${exec_prefix}/lib/cairo/libcairo-trace.so ${exec_prefix}/lib/cairo/libcairo-trace.so* ${exec_prefix}/lib/cairo/libcairo-trace.*.so ; do
	if test -h "$lib" -o -f "$lib"; then
	    CAIRO_TRACE_SO="$lib"
	    break
	fi
    done
fi
if test "x$CAIRO_TRACE_SO" = "x"; then
    echo "Could not find the cairo-trace shared library in ${exec_prefix}/lib/cairo/." >&2
    echo "Set the CAIRO_TRACE_SO environment variable to the full path of the library." >&2
    exit 15
fi

LD_PRELOAD="$CAIRO_TRACE_SO"
DYLD_INSERT_LIBRARIES="$CAIRO_TRACE_SO"
DYLD_FORCE_FLAT_NAMESPACE=1
export LD_PRELOAD
export DYLD_INSERT_LIBRARIES
export DYLD_FORCE_FLAT_NAMESPACE

if test -n "$nocallers"; then
    CAIRO_TRACE_LINE_INFO=0
    export CAIRO_TRACE_LINE_INFO
fi

if test -n "$nomarkdirty"; then
    CAIRO_TRACE_MARK_DIRTY=0
    export CAIRO_TRACE_MARK_DIRTY
fi

if test -n "$flush"; then
    CAIRO_TRACE_FLUSH=1
    export CAIRO_TRACE_FLUSH
fi

if test -z "$nofile"; then
    CAIRO_TRACE_OUTDIR=`pwd` "$@"
elif test -n "$compress"; then
    name=`basename $1`
    echo Generating compressed trace file $name.$$.lzma
    CAIRO_TRACE_FD=3 "$@" 3>&1 >/dev/null | lzma -cz9 > $name.$$.lzma
else
    CAIRO_TRACE_FD=3 "$@" 3>&1 >/dev/null
fi
