#!/bin/sh

##########################################################################
#
#This script is used to create API C source file for Aubit libraraies
#to be loaded at run-time using dlopen() function call.
#
#
#
#
#
#
##########################################################################

#Include both headers:
#In file included from console.c:58:
#/opt/aubit/aubit4glsrc/incl/a4gl_API_ui_lib.h:38: warning: redundant redeclaration of `A4GLUI_initlib' in same scope
#/opt/aubit/aubit4glsrc/incl/a4gl_API_ui.h:38: warning: previous declaration of `A4GLUI_initlib'



#Get settings
if [ "$AUBITDIR" != "" ]; then
	. $AUBITDIR/etc/aubitrc
else
	echo "WARNING: AUBITDIR not set"
	echo "ERROR: cannot read settings. STOP."
	exit 3
fi

if [ $# -lt 1 -o "$1" = "--help" ]; then
	echo "Creates run-time loadable library API definition source code "
	echo " "
	echo "Usage:   dlmagic <SpecFile> [<APIName>] [<EnvVar>] > <APIname>.c"
	echo "  SpecFile - contains specifications for the API"
	echo "  APIName - API name (will be overwritten by LIBRARY tag if declared"
	echo "      in SpecFile)"
	echo "  EnvVar - Environment variable to read (will be overwritten by"
	echo "      VARIABLE tag if declared in the SpecFile)"
	echo " "
	echo "Example: "
	echo "  dlmagic sqlapi.spec SQL SQLTYPE > API_SQL.c "
	echo " "
	echo "SpecFile file format:"
	echo "  func-name param-type param-name ... -> returns"
	echo "  line beginning with * is a comment"
	echo "  line beginning with # or / is included in the output Eg #define //comment etc"
	echo " "
	echo "Example input File :"
	echo "	LIBRARY TEST"
	echo "	VARIABLE VTEST"
	echo "	* This is a comment - Note - there are no spaces for void* int* etc."
	echo "	pdf_rep_print void* rep,int a,int s,int right_margin -> int*"
	echo "	disp_fields int n int attr ... -> int"
	echo " "

	exit 0
fi

specfile=$1
VERBOSE=0
selfonly=0

if [ "x$2" = "x-h" -o "x$2" = "x-H" -o "x$2" = "x-S" ] ; then
	if [ "$2" = "-h" ]
	then
		#make header only; use api_prefix for function names
		MAKE_HEADER=1 		#use_prefix=0 (printf rtype " " api_prefix fname)
		#for instance, in case of API_ui.spec, this will generate a4gl_API_ui.h
	fi
	if [ "$2" = "-H" ] ; then
		#make header only; use lib_prefix for function names
		MAKE_HEADER=2 	#use_prefix=1 (printf rtype " " lib_prefix fname)
		#for instance, in case of API_ui.spec, this will generate a4gl_API_ui_lib.h
	fi
	if [ "$2" = "-S" ] ; then
		# Self only mode doesn't include any of the dlopen stuff - instead  it links directly
		# with the plugin...
		# You *HAVE* to have a LIB_PREFIX in order for this to work...
		#
		selfonly=1
	fi
	lib="$3"
	env="$4"
else
		lib="$2"
		env="$3"
fi

lib_prefix=
api_prefix=

if test "$lib" = ""; then
	#Potentially already passed on command line 
	if grep "^LIBRARY " $specfile > /dev/null ; then
		lib=`$AWK '/^LIBRARY /{print $2}' $specfile`
	fi
fi
if test "$env" = ""; then
	#Potentially already passed on command line
	if grep "^VARIABLE " $specfile > /dev/null ; then
		env=`$AWK '/^VARIABLE /{print $2}' $specfile`
	fi
fi

#if you want prefix to be added to API function names
if grep "^API_PREFIX " $specfile > /dev/null ; then
	api_prefix=`$AWK '/^API_PREFIX /{print $2}' $specfile`
fi

#if you want prefix to be added to LIB functions calls
if grep "^LIB_PREFIX " $specfile > /dev/null ; then
	lib_prefix=`$AWK '/^LIB_PREFIX /{print $2}' $specfile`
fi

#name of the headers file to be refgerenced with #include
if grep "^HEADER_FILE " $specfile > /dev/null ; then
	HEADER_FILE=`$AWK '/^HEADER_FILE /{print $2}' $specfile`
fi


MULTILOAD_LIBRARY=0
if grep "^MULTILOAD_LIBRARY" $specfile > /dev/null ; then
	MULTILOAD_LIBRARY=1
fi


if [ "$selfonly" = 1 -a "$lib_prefix" = "" ]
then
	echo "You cannot use self mode without specifying a lib_prefix"
	exit 2
fi

#echo "/* Library=$lib env=$env */"

if [ "$MAKE_HEADER" = "1" -o "$MAKE_HEADER" = "2" ]; then
	################################################################
	#					Output a header file (.h)
	################################################################
	if  [ $MAKE_HEADER = "2" ] ; then
		use_prefix=1
		if test "$lib_prefix" = ""; then
			if test "$VERBOSE" = "1" ; then
				echo "WARNING: LIB_PREFIX not set in .spec file (-H)" > /dev/stderr
			fi
			#exit 4
		fi
		if test "$VERBOSE" = "1" ; then 
			echo "dlmagic: making header using LIB_PREFIX=$lib_prefix (-H)" > /dev/stderr
		fi
	else
		use_prefix=0
		if test "$api_prefix" = ""; then
			if test "$VERBOSE" = "1" ; then
				echo "WARNING: API_PREFIX not set in .spec file (-h)" > /dev/stderr
			fi
			#exit 4
		fi
		if test "$VERBOSE" = "1" ; then 
			echo "dlmagic: making header using API_PREFIX=$api_prefix (-h)" > /dev/stderr
		fi
		
	fi

	$AWK -v use_prefix=$use_prefix -v lib="$lib" -v multiload_library="$MULTILOAD_LIBRARY" -v env="$env" -v lib_prefix="$lib_prefix" -v api_prefix="$api_prefix" -v HEADER_FILE="$HEADER_FILE" -f $AUBITDIR/lib/bin/dlmagic_h.awk < $specfile

	echo "#ifdef __cplusplus"
	echo "}"
	echo "#endif"
	echo "#endif  /* #ifdef __($lib)_H__  */"
	echo ""

    exit 0
fi # "$MAKE_HEADER" = "1" -o "$MAKE_HEADER" = "2"

############################################################################
#						Output API .c code
############################################################################

	if test "$VERBOSE" = "1" ; then 
		echo "dlmagic: making .c API code..." > /dev/stderr
	fi

	if [ "x$lib" = "x" ]
	then
		lib="not-set"
	fi
	if [ "x$env" = "x" ]
	then
		env="not-set"
	fi

	$AWK -v xlib="$lib" -v multiload_library="$MULTILOAD_LIBRARY" -v env="$env" -v lib_prefix="$lib_prefix" -v api_prefix="$api_prefix" -v HEADER_FILE="$HEADER_FILE" -v selfonly="$selfonly" -f $AUBITDIR/lib/bin/dlmagic_c.awk < $specfile > dlm.1

	if [ "$selfonly" = 1 ]
	then
		cat header.dlmagic dlm.1
		rm dlm.1 header.dlmagic
	else
		cat header.dlmagic  dlm.1
		echo "static void clrcachedptrs(void) {"
		cat clrptr.dlmagic
		echo "}"
		rm header.dlmagic  dlm.1  clrptr.dlmagic
	fi

exit