#!/usr/bin/awk -f

function gobble(s, x)
{
	sub(/^ /, "", line)
	match(line, "^" "(" s ")")
	x = substr(line, 1, RLENGTH)
	line = substr(line, RLENGTH+1)
	return x 
}

function convert(i, j, t)
{
	type = argtypes[i,j]
	name = argnames[i,j]
	opt  = optionals[i,j]
	tabs = x = ""

	for (i = 0; i < t; i++) { tabs = tabs "\t" }

	if (type == "int" || type == "long") {
		longs = longs "\tlong " name ";\n"
	} else if (type == "bool" || type == "boolean") {
		bools = bools "\tzend_bool " name ";\n"
	} else if (type == "double" || type == "float") {
		doubles = doubles "\tdouble " name ";\n"
	} else if (type == "string") {
		strings = strings "\tchar *" name " = NULL;\n"
		ints = ints "\tint " name "_len;\n"
	} else if (type == "array" || type == "object" || type == "mixed") {
		zvals = zvals "\tzval *" name " = NULL;\n"
	} else if (type == "resource" || type == "handle") {
		zvals = zvals "\tzval *" name " = NULL;\n"
		resources = resources "\tif (" name ") {\n" \
			"\t\tZEND_FETCH_RESOURCE(???, ???, " name ", " name "_id, \"???\", ???_rsrc_id);\n\t}\n"
		ints = ints "\tint " name "_id = -1;\n"
	}
}

function comment(s)
{
	if (i_know_what_to_do_shut_up_i_dont_need_your_help_mode) {
		return
	} else {
		return s
	}
}

BEGIN {
	name = "[_A-Za-z][_A-Za-z0-9]*"
	type = "int|long|double|float|string|bool|boolean|array|object|resource|handle|mixed|void"
	spec = "l|l|d|d|s|b|b|a|o|r|r|z|"
	num_funcs = 0

# create a map from type name to the spec
	split(type, type_array, "\|")
	split(spec, spec_array, "\|")
	for (i in type_array) {
		spec_map[type_array[i]] = spec_array[i]
	}

	if (xml && xml != "yes") {
		xmldoc = xml
	} else {
		xmldoc = extname "/" extname ".xml"
	}
			

	xmlhead = "<?xml version='1.0' encoding='iso-8859-1'?>\n" \
    "<!-- $Id: create_stubs,v 1.1.1.2 2012/05/29 12:34:42 misho Exp $ -->\n" \
    " <reference id=\"ref." extname "\">\n" \
		"  <title> functions</title>\n" \
		"  <titleabbrev></titleabbrev>\n\n" \
		"  <partintro>\n" \
		"   &warn.experimental;\n" \
    "   <para>\n" \
    "   </para>\n" \
    "  </partintro>\n\n";

	xmlfoot = " </reference>\n\n" \
		"<!-- Keep this comment at the end of the file\n" \
		"Local variables:\n" \
		"mode: sgml\n" \
		"sgml-omittag:t\n" \
		"sgml-shorttag:t\n" \
		"sgml-minimize-attributes:nil\n" \
		"sgml-always-quote-attributes:t\n" \
		"sgml-indent-step:1\n" \
		"sgml-indent-data:t\n" \
		"indent-tabs-mode:nil\n" \
		"sgml-parent-document:nil\n" \
		"sgml-default-dtd-file:\"../../manual.ced\"\n" \
		"sgml-exposed-tags:nil\n" \
		"sgml-local-catalogs:nil\n" \
		"sgml-local-ecat-files:nil\n" \
		"End:\n" \
		"vim600: syn=xml fen fdm=syntax fdl=2 si\n" \
		"vim: et tw=78 syn=sgml\n" \
		"vi: ts=1 sw=1\n" \
		"-->\n"
}

{
	args_max = args_min = optional = i = spec_opt = 0
	line = $0
	spec_str = "\""

## php extension must use lower case function names.
## this will translate any capitalized letter to lowercase
## and warn the user
	if (match(func_name,"[A-Z]") != 0) {
		printf("NOTICE: lower casing function name '%s'\n",func_name)
		func_name = tolower(func_name)
	}
	func_type = gobble(type);
	func_name = gobble(name);

	if (gobble("\\(")) {
		if (gobble("\\[")) optional = 1
		while (arg_type = gobble(type)) {
			arg_name = gobble(name)
			if(arg_type == "void") {
				args_max = 0;
				args_min = 0;
				break;
			} else {
				argtypes[num_funcs,args_max] = arg_type
				argnames[num_funcs,args_max] = arg_name

				args_max++
				if (optional) {
					if (!spec_opt) {
						spec_str = spec_str "|"
						spec_opt = 1
					}
					optionals[num_funcs,i] = optional
				} else {
					args_min++
				}
				spec_str = spec_str spec_map[arg_type]

				if (x = gobble("\\[")) {
					optional++
				}

				y = gobble(",")
				if (!x && y && optional) {
					grouped_optional_param[num_funcs,i] = 1
				}
				i++
			}
		}
	}

#	if (x = gobble("\\)")) {
		gobble("\\]* *\\)")
		sub(/^[ \t]+/, "", line)
		fcomments[num_funcs] = line
#	}

	spec_str = spec_str "\""

	funcs[num_funcs]   = func_name
	types[num_funcs]   = func_type
	maxargs[num_funcs] = args_max
	minargs[num_funcs] = args_min
	specs[num_funcs]   = spec_str
	spec_opts[num_funcs] = spec_opt

	num_funcs++
}

END {
	if (xml) print xmlhead > xmldoc
	for (i = 0; i < num_funcs; i++) {
		compareargc = maxargs[i] - minargs[i]
		closefetch = fetchargs = zvals = xmlparams = funcvals = resources = handleargs = closeopts = ""
		ints = longs = doubles = strings = bools = zvals = ""

		proto = "/* {{{ proto " types[i] " " funcs[i] "("

	 	refid = funcs[i]
	 	gsub(/_/, "-", refid)
	 	xmlstr = "  <refentry id=\"function." refid "\">\n" \
			"   <refnamediv>\n" \
			"    <refname>" funcs[i] "</refname>\n" \
			"    <refpurpose>" fcomments[i] "</refpurpose>\n" \
			"   </refnamediv>\n" \
			"   <refsect1>\n" \
			"    <title>Description</title>\n" \
			"    <funcsynopsis>\n" \
			"     <funcprototype>\n" \
			"      <funcdef>" types[i] " <function>" funcs[i] "</function></funcdef>\n"

		if (maxargs[i]>0) {
			fetchargs = "\tif (zend_parse_parameters("
			ints = ints "\tint argc = ZEND_NUM_ARGS();\n"
			fetchargs = fetchargs "argc TSRMLS_CC, " specs[i]
		} else {
			fetchargs = fetchargs "\tif (zend_parse_parameters_none() == FAILURE) {\n\t\treturn;\n\t}"
	 		xmlparams = xmlparams "      <void/>\n"
		}

		for (j = 0; j < maxargs[i]; j++) {

			fetchargs = fetchargs ", "

			fetchargs = fetchargs "&" argnames[i,j]
			if (argtypes[i,j] == "string") {
				fetchargs = fetchargs ", &" argnames[i,j] "_len"
			}

			xmlparams = xmlparams "      <paramdef>" argtypes[i,j]
			if (j > minargs[i]-1) {
				if (!grouped_optional_param[i,j-1]) {
					if (j > 0) proto = proto " "
					proto = proto "["
					closeopts = closeopts "]"
				}
				xmlparams = xmlparams "\n       <parameter><optional>" \
					argnames[i,j] \
					"</optional></parameter>\n      </paramdef>\n"
			} else {
				xmlparams = xmlparams \
					" <parameter>" \
					argnames[i,j] \
					"</parameter></paramdef>\n"
			}

			if (j > 0) proto = proto ", "
			proto = proto argtypes[i,j] " " argnames[i,j]

			convert(i, j, 1)
		}

		proto = proto closeopts ")\n   " fcomments[i] " */\nPHP_FUNCTION(" funcs[i] ")\n{"
		if (maxargs[i]>0) {
			fetchargs = fetchargs ") == FAILURE)" closefetch " \n\t\treturn;\n"
		}
		funcvals = strings ints longs doubles bools zvals
		xmlstr = xmlstr xmlparams \
			"     </funcprototype>\n" \
			"    </funcsynopsis>\n" \
			"     &warn.experimental.func;\n" \
			"    <para>\n" \
			"     &warn.undocumented.func;\n" \
			"    </para>\n" \
			"   </refsect1>\n" \
			"  </refentry>\n"

		print proto > stubfile
 		if (funcvals) print funcvals > stubfile
		if (fetchargs) print fetchargs > stubfile
		if (resources) {
				print resources > stubfile
				if (!stubs) print "" > extname "/function_warning"
		}
		if (!i_know_what_to_do_shut_up_i_dont_need_your_help_mode) {
			print "\tphp_error(E_WARNING, \"" funcs[i] ": not yet implemented\");" > stubfile
		}
		print "}\n/* }}} */\n" > stubfile

		if (stubs) {
			h_stubs = h_stubs "PHP_FUNCTION(" funcs[i] ");\n"
			c_stubs = c_stubs "\tPHP_FE(" funcs[i] ",\tNULL)\n"
		} else {
			print "PHP_FUNCTION(" funcs[i] ");" > extname "/function_declarations"
			print "\tPHP_FE(" funcs[i] ",\tNULL)" > extname "/function_entries"
		}

		if (xml) print xmlstr > xmldoc
	}

	if (stubs) {
		print "\n/* ----------------------------------------------------------- */\n" > stubfile
		print c_stubs > stubfile
		print "\n/* ----------------------------------------------------------- */\n" > stubfile
		print h_stubs > stubfile
	}

	if (xml) print xmlfoot > xmldoc
}

#
# Local variables:
# tab-width: 2
# c-basic-offset: 2
# End: