/branches/closed/gsoc2009-vmiklos/Source/Modules/php.cxx

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/* -----------------------------------------------------------------------------
 * See the LICENSE file for information on copyright, usage and redistribution
 * of SWIG, and the README file for authors - http://www.swig.org/release.html.
 *
 * php.cxx
 *
 * PHP language module for SWIG.
 * -----------------------------------------------------------------------------
 */

/* FIXME: PHP5 OO wrapping TODO list:
 *
 * Short term:
 *
 * Sort out auto-renaming of method and class names which are reserved
 *   words (e.g. empty, clone, exception, etc.)
 *
 * Sort out wrapping of static member variables in OO PHP5.
 *
 * Medium term:
 *
 * Handle default parameters on overloaded methods in PHP where possible.
 *   (Mostly done - just need to handle cases of overloaded methods with
 *   default parameters...)
 *   This is an optimisation - we could handle this case using a PHP
 *   default value, but currently we treat it as we would for a default
 *   value which is a compound C++ expression (i.e. as if we had a
 *   method with two overloaded forms instead of a single method with
 *   a default parameter value).
 *
 * Long term:
 *
 * Sort out locale-dependent behaviour of strtod() - it's harmless unless
 *   SWIG ever sets the locale and DOH/base.c calls atof, so we're probably
 *   OK currently at least.
 */

/*
 * TODO: Replace remaining stderr messages with Swig_error or Swig_warning
 * (may need to add more WARN_PHP_xxx codes...)
 */

char cvsroot_php_cxx[] = "$Id: php.cxx 11432 2009-07-21 22:58:55Z vmiklos $";

#include "swigmod.h"

#include <ctype.h>
#include <errno.h>

static const char *usage = (char *) "\
PHP Options (available with -php)\n\
     -cppext          - cpp file extension (default to .cpp)\n\
     -noproxy         - Don't generate proxy classes.\n\
     -prefix <prefix> - Prepend <prefix> to all class names in PHP wrappers\n\
\n";

/* The original class wrappers for PHP stored the pointer to the C++ class in
 * the object property _cPtr.  If we use the same name for the member variable
 * which we put the pointer to the C++ class in, then the flat function
 * wrappers will automatically pull it out without any changes being required.
 * FIXME: Isn't using a leading underscore a bit suspect here?
 */
#define SWIG_PTR "_cPtr"

/* This is the name of the hash where the variables existing only in PHP
 * classes are stored.
 */
#define SWIG_DATA "_pData"

static int constructors = 0;
static String *NOTCLASS = NewString("Not a class");
static Node *classnode = 0;
static String *module = 0;
static String *cap_module = 0;
static String *prefix = 0;

static String *shadow_classname = 0;

static File *f_begin = 0;
static File *f_runtime = 0;
static File *f_runtime_h = 0;
static File *f_h = 0;
static File *f_phpcode = 0;
static File *f_directors = 0;
static File *f_directors_h = 0;
static String *phpfilename = 0;

static String *s_header;
static String *s_wrappers;
static String *s_init;
static String *r_init;		// RINIT user code
static String *s_shutdown;	// MSHUTDOWN user code
static String *r_shutdown;	// RSHUTDOWN user code
static String *s_vinit;		// varinit initialization code.
static String *s_vdecl;
static String *s_cinit;		// consttab initialization code.
static String *s_oinit;
static String *s_entry;
static String *cs_entry;
static String *all_cs_entry;
static String *pragma_incl;
static String *pragma_code;
static String *pragma_phpinfo;
static String *s_oowrappers;
static String *s_fakeoowrappers;
static String *s_phpclasses;

/* Variables for using PHP classes */
static Node *current_class = 0;

static Hash *shadow_get_vars;
static Hash *shadow_set_vars;
static Hash *zend_types = 0;

static int shadow = 1;

static bool class_has_ctor = false;
static String *wrapping_member_constant = NULL;

// These static variables are used to pass some state from Handlers into functionWrapper
static enum {
  standard = 0,
  memberfn,
  staticmemberfn,
  membervar,
  staticmembervar,
  constructor,
  directorconstructor,
  destructor
} wrapperType = standard;

extern "C" {
  static void (*r_prevtracefunc) (SwigType *t, String *mangled, String *clientdata) = 0;
}

void SwigPHP_emit_resource_registrations() {
  Iterator ki;

  if (!zend_types)
    return;

  ki = First(zend_types);
  if (ki.key)
    Printf(s_oinit, "\n/* Register resource destructors for pointer types */\n");
  while (ki.key) {
    DOH *key = ki.key;
    Node *class_node = ki.item;
    String *human_name = key;

    // Write out destructor function header
    Printf(s_wrappers, "/* NEW Destructor style */\nstatic ZEND_RSRC_DTOR_FUNC(_wrap_destroy%s) {\n", key);

    // write out body
    if (class_node != NOTCLASS) {
      String *destructor = Getattr(class_node, "destructor");
      human_name = Getattr(class_node, "sym:name");
      if (!human_name)
        human_name = Getattr(class_node, "name");
      // Do we have a known destructor for this type?
      if (destructor) {
        Printf(s_wrappers, "  %s(rsrc, SWIGTYPE%s->name TSRMLS_CC);\n", destructor, key);
      } else {
        Printf(s_wrappers, "  /* No destructor for class %s */\n", human_name);
      }
    } else {
      Printf(s_wrappers, "  /* No destructor for simple type %s */\n", key);
    }

    // close function
    Printf(s_wrappers, "}\n");

    // declare le_swig_<mangled> to store php registration
    Printf(s_vdecl, "static int le_swig_%s=0; /* handle for %s */\n", key, human_name);

    // register with php
    Printf(s_oinit, "le_swig_%s=zend_register_list_destructors_ex" "(_wrap_destroy%s,NULL,(char *)(SWIGTYPE%s->name),module_number);\n", key, key, key);

    // store php type in class struct
    Printf(s_oinit, "SWIG_TypeClientData(SWIGTYPE%s,&le_swig_%s);\n", key, key);

    ki = Next(ki);
  }
}

class PHP : public Language {
public:
  PHP() {
    director_language = 1;
  }

  /* Test to see if a type corresponds to something wrapped with a shadow class. */
  
  String *is_shadow(SwigType *t) {
    String *r = 0;
    Node *n = classLookup(t);
    if (n) {
      r = Getattr(n, "php:proxy");	// Set by classDeclaration()
      if (!r) {
	r = Getattr(n, "sym:name");	// Not seen by classDeclaration yet, but this is the name
      }
    }
    return r;
  }

  /* ------------------------------------------------------------
   * main()
   * ------------------------------------------------------------ */

  virtual void main(int argc, char *argv[]) {
    SWIG_library_directory("php");
    SWIG_config_cppext("cpp");

    for (int i = 1; i < argc; i++) {
      if (strcmp(argv[i], "-prefix") == 0) {
	if (argv[i + 1]) {
	  prefix = NewString(argv[i + 1]);
	  Swig_mark_arg(i);
	  Swig_mark_arg(i + 1);
	  i++;
	} else {
	  Swig_arg_error();
	}
      } else if (strcmp(argv[i], "-cppext") == 0) {
	if (argv[i + 1]) {
	  SWIG_config_cppext(argv[i + 1]);
	  Swig_mark_arg(i);
	  Swig_mark_arg(i + 1);
	  i++;
	} else {
	  Swig_arg_error();
	}
      } else if ((strcmp(argv[i], "-noshadow") == 0) || (strcmp(argv[i], "-noproxy") == 0)) {
	shadow = 0;
	Swig_mark_arg(i);
      } else if (strcmp(argv[i], "-help") == 0) {
	fputs(usage, stdout);
      } else if (strcmp(argv[i], "-make") == 0 ||
		 strcmp(argv[i], "-withc") == 0 ||
		 strcmp(argv[i], "-withcxx") == 0) {
	Printf(stderr, "*** %s is no longer supported.\n", argv[i]);
	SWIG_exit(EXIT_FAILURE);
      } else if (strcmp(argv[i], "-phpfull") == 0 ||
		 strcmp(argv[i], "-withlibs") == 0 ||
		 strcmp(argv[i], "-withincs") == 0) {
	Printf(stderr, "*** %s is no longer supported.\n*** We recommend building as a dynamically loadable module.\n", argv[i]);
	SWIG_exit(EXIT_FAILURE);
      } else if (strcmp(argv[i], "-dlname") == 0) {
	Printf(stderr, "*** -dlname is no longer supported.\n*** If you want to change the module name, use -module instead.\n");
	SWIG_exit(EXIT_FAILURE);
      }
    }

    Preprocessor_define("SWIGPHP 1", 0);
    // SWIGPHP5 is deprecated, and no longer documented.
    Preprocessor_define("SWIGPHP5 1", 0);
    SWIG_typemap_lang("php");
    SWIG_config_file("php.swg");
    allow_overloading();
  }

  /* ------------------------------------------------------------
   * top()
   * ------------------------------------------------------------ */

  virtual int top(Node *n) {

    String *filen;
    String *s_type;

    /* Check if directors are enabled for this module. */
    Node *mod = Getattr(n, "module");
    if (mod) {
      Node *options = Getattr(mod, "options");
      if (options && Getattr(options, "directors")) {
	allow_directors();
      }
    }

    /* Set comparison with null for ConstructorToFunction */
    setSubclassInstanceCheck(NewString("$arg->type != IS_NULL"));

    /* Initialize all of the output files */
    String *outfile = Getattr(n, "outfile");
    String *outfile_h = Getattr(n, "outfile_h");

    /* main output file */
    f_begin = NewFile(outfile, "w", SWIG_output_files());
    if (!f_begin) {
      FileErrorDisplay(outfile);
      SWIG_exit(EXIT_FAILURE);
    }
    f_runtime = NewStringEmpty();

    /* sections of the output file */
    s_init = NewString("/* init section */\n");
    r_init = NewString("/* rinit section */\n");
    s_shutdown = NewString("/* shutdown section */\n");
    r_shutdown = NewString("/* rshutdown section */\n");
    s_header = NewString("/* header section */\n");
    s_wrappers = NewString("/* wrapper section */\n");
    s_type = NewStringEmpty();
    /* subsections of the init section */
    s_vinit = NewString("/* vinit subsection */\n");
    s_vdecl = NewString("/* vdecl subsection */\n");
    s_cinit = NewString("/* cinit subsection */\n");
    s_oinit = NewString("/* oinit subsection */\n");
    pragma_phpinfo = NewStringEmpty();
    s_phpclasses = NewString("/* PHP Proxy Classes */\n");
    f_directors_h = NewStringEmpty();
    f_directors = NewStringEmpty();

    if (directorsEnabled()) {
      f_runtime_h = NewFile(outfile_h, "w", SWIG_output_files());
      if (!f_runtime_h) {
	FileErrorDisplay(outfile_h);
	SWIG_exit(EXIT_FAILURE);
      }
    }

    /* Register file targets with the SWIG file handler */
    Swig_register_filebyname("begin", f_begin);
    Swig_register_filebyname("runtime", f_runtime);
    Swig_register_filebyname("init", s_init);
    Swig_register_filebyname("rinit", r_init);
    Swig_register_filebyname("shutdown", s_shutdown);
    Swig_register_filebyname("rshutdown", r_shutdown);
    Swig_register_filebyname("header", s_header);
    Swig_register_filebyname("wrapper", s_wrappers);
    Swig_register_filebyname("director", f_directors);
    Swig_register_filebyname("director_h", f_directors_h);

    Swig_banner(f_begin);

    Printf(f_runtime, "\n");
    Printf(f_runtime, "#define SWIGPHP\n");
    Printf(f_runtime, "\n");

    if (directorsEnabled()) {
      Printf(f_runtime, "#define SWIG_DIRECTORS\n");
    }

    /* Set the module name */
    module = Copy(Getattr(n, "name"));
    cap_module = NewStringf("%(upper)s", module);
    if (!prefix)
      prefix = NewStringEmpty();

    if (directorsEnabled()) {
      Swig_banner(f_directors_h);
      Printf(f_directors_h, "\n");
      Printf(f_directors_h, "#ifndef SWIG_%s_WRAP_H_\n", cap_module);
      Printf(f_directors_h, "#define SWIG_%s_WRAP_H_\n\n", cap_module);

      Printf(f_directors, "\n#include \"%s\"\n\n", Swig_file_filename(outfile_h));
    }

    /* PHP module file */
    filen = NewStringEmpty();
    Printv(filen, SWIG_output_directory(), module, ".php", NIL);
    phpfilename = NewString(filen);

    f_phpcode = NewFile(filen, "w", SWIG_output_files());
    if (!f_phpcode) {
      FileErrorDisplay(filen);
      SWIG_exit(EXIT_FAILURE);
    }

    Printf(f_phpcode, "<?php\n\n");

    Swig_banner(f_phpcode);

    Printf(f_phpcode, "\n");
    Printf(f_phpcode, "// Try to load our extension if it's not already loaded.\n");
    Printf(f_phpcode, "if (!extension_loaded('%s')) {\n", module);
    Printf(f_phpcode, "  if (strtolower(substr(PHP_OS, 0, 3)) === 'win') {\n");
    Printf(f_phpcode, "    if (!dl('php_%s.dll')) return;\n", module);
    Printf(f_phpcode, "  } else {\n");
    Printf(f_phpcode, "    // PHP_SHLIB_SUFFIX gives 'dylib' on MacOS X but modules are 'so'.\n");
    Printf(f_phpcode, "    if (PHP_SHLIB_SUFFIX === 'dylib') {\n");
    Printf(f_phpcode, "      if (!dl('%s.so')) return;\n", module);
    Printf(f_phpcode, "    } else {\n");
    Printf(f_phpcode, "      if (!dl('%s.'.PHP_SHLIB_SUFFIX)) return;\n", module);
    Printf(f_phpcode, "    }\n");
    Printf(f_phpcode, "  }\n");
    Printf(f_phpcode, "}\n\n");

    /* sub-sections of the php file */
    pragma_code = NewStringEmpty();
    pragma_incl = NewStringEmpty();

    /* Initialize the rest of the module */

    Printf(s_oinit, "ZEND_INIT_MODULE_GLOBALS(%s, %s_init_globals, %s_destroy_globals);\n", module, module, module);

    /* start the header section */
    Printf(s_header, "ZEND_BEGIN_MODULE_GLOBALS(%s)\n", module);
    Printf(s_header, "const char *error_msg;\n");
    Printf(s_header, "int error_code;\n");
    Printf(s_header, "ZEND_END_MODULE_GLOBALS(%s)\n", module);
    Printf(s_header, "ZEND_DECLARE_MODULE_GLOBALS(%s)\n", module);
    Printf(s_header, "#ifdef ZTS\n");
    Printf(s_header, "#define SWIG_ErrorMsg() TSRMG(%s_globals_id, zend_%s_globals *, error_msg )\n", module, module);
    Printf(s_header, "#define SWIG_ErrorCode() TSRMG(%s_globals_id, zend_%s_globals *, error_code )\n", module, module);
    Printf(s_header, "#else\n");
    Printf(s_header, "#define SWIG_ErrorMsg() (%s_globals.error_msg)\n", module);
    Printf(s_header, "#define SWIG_ErrorCode() (%s_globals.error_code)\n", module);
    Printf(s_header, "#endif\n\n");

    Printf(s_header, "static void %s_init_globals(zend_%s_globals *globals ) {\n", module, module);
    Printf(s_header, "  globals->error_msg = default_error_msg;\n");
    Printf(s_header, "  globals->error_code = default_error_code;\n");
    Printf(s_header, "}\n");

    Printf(s_header, "static void %s_destroy_globals(zend_%s_globals * globals) { (void)globals; }\n", module, module);

    Printf(s_header, "\n");
    Printf(s_header, "static void SWIG_ResetError() {\n");
    Printf(s_header, "  TSRMLS_FETCH();\n");
    Printf(s_header, "  SWIG_ErrorMsg() = default_error_msg;\n");
    Printf(s_header, "  SWIG_ErrorCode() = default_error_code;\n");
    Printf(s_header, "}\n");

    Append(s_header, "\n");
    Printf(s_header, "ZEND_NAMED_FUNCTION(_wrap_swig_%s_alter_newobject) {\n", module);
    Append(s_header, "  zval **args[2];\n");
    Append(s_header, "  swig_object_wrapper *value;\n");
    Append(s_header, "  int type;\n");
    Append(s_header, "  int thisown;\n");
    Append(s_header, "\n");
    Append(s_header, "  SWIG_ResetError();\n");
    Append(s_header, "  if(ZEND_NUM_ARGS() != 2 || zend_get_parameters_array_ex(2, args) != SUCCESS) {\n");
    Append(s_header, "    WRONG_PARAM_COUNT;\n");
    Append(s_header, "  }\n");
    Append(s_header, "\n");
    Append(s_header, "  value = (swig_object_wrapper *) zend_list_find((*args[0])->value.lval, &type);\n");
    Append(s_header, "  value->newobject = zval_is_true(*args[1]);\n");
    Append(s_header, "\n");
    Append(s_header, "  return;\n");
    Append(s_header, "}\n");
    Printf(s_header, "ZEND_NAMED_FUNCTION(_wrap_swig_%s_get_newobject) {\n", module);
    Append(s_header, "  zval **args[1];\n");
    Append(s_header, "  swig_object_wrapper *value;\n");
    Append(s_header, "  int type;\n");
    Append(s_header, "\n");
    Append(s_header, "  SWIG_ResetError();\n");
    Append(s_header, "  if(ZEND_NUM_ARGS() != 1 || zend_get_parameters_array_ex(1, args) != SUCCESS) {\n");
    Append(s_header, "    WRONG_PARAM_COUNT;\n");
    Append(s_header, "  }\n");
    Append(s_header, "\n");
    Append(s_header, "  value = (swig_object_wrapper *) zend_list_find((*args[0])->value.lval, &type);\n");
    Append(s_header, "  RETVAL_LONG(value->newobject);\n");
    Append(s_header, "\n");
    Append(s_header, "  return;\n");
    Append(s_header, "}\n");

    Printf(s_header, "#define SWIG_name  \"%s\"\n", module);
    /*     Printf(s_header,"#ifdef HAVE_CONFIG_H\n");
       Printf(s_header,"#include \"config.h\"\n");
       Printf(s_header,"#endif\n\n");
     */
    Printf(s_header, "#ifdef __cplusplus\n");
    Printf(s_header, "extern \"C\" {\n");
    Printf(s_header, "#endif\n");
    Printf(s_header, "#include \"php.h\"\n");
    Printf(s_header, "#include \"php_ini.h\"\n");
    Printf(s_header, "#include \"ext/standard/info.h\"\n");
    Printf(s_header, "#include \"php_%s.h\"\n", module);
    Printf(s_header, "#ifdef __cplusplus\n");
    Printf(s_header, "}\n");
    Printf(s_header, "#endif\n\n");

    if (directorsEnabled()) {
      // Insert director runtime
      Swig_insert_file("director.swg", s_header);
    }

    /* Create the .h file too */
    filen = NewStringEmpty();
    Printv(filen, SWIG_output_directory(), "php_", module, ".h", NIL);
    f_h = NewFile(filen, "w", SWIG_output_files());
    if (!f_h) {
      FileErrorDisplay(filen);
      SWIG_exit(EXIT_FAILURE);
    }

    Swig_banner(f_h);

    Printf(f_h, "\n");
    Printf(f_h, "#ifndef PHP_%s_H\n", cap_module);
    Printf(f_h, "#define PHP_%s_H\n\n", cap_module);
    Printf(f_h, "extern zend_module_entry %s_module_entry;\n", module);
    Printf(f_h, "#define phpext_%s_ptr &%s_module_entry\n\n", module, module);
    Printf(f_h, "#ifdef PHP_WIN32\n");
    Printf(f_h, "# define PHP_%s_API __declspec(dllexport)\n", cap_module);
    Printf(f_h, "#else\n");
    Printf(f_h, "# define PHP_%s_API\n", cap_module);
    Printf(f_h, "#endif\n\n");
    Printf(f_h, "#ifdef ZTS\n");
    Printf(f_h, "#include \"TSRM.h\"\n");
    Printf(f_h, "#endif\n\n");
    Printf(f_h, "PHP_MINIT_FUNCTION(%s);\n", module);
    Printf(f_h, "PHP_MSHUTDOWN_FUNCTION(%s);\n", module);
    Printf(f_h, "PHP_RINIT_FUNCTION(%s);\n", module);
    Printf(f_h, "PHP_RSHUTDOWN_FUNCTION(%s);\n", module);
    Printf(f_h, "PHP_MINFO_FUNCTION(%s);\n\n", module);

    /* start the function entry section */
    s_entry = NewString("/* entry subsection */\n");

    /* holds all the per-class function entry sections */
    all_cs_entry = NewString("/* class entry subsection */\n");
    cs_entry = NULL;

    Printf(s_entry, "/* Every non-class user visible function must have an entry here */\n");
    Printf(s_entry, "static zend_function_entry %s_functions[] = {\n", module);

    /* start the init section */
    Printv(s_init, "zend_module_entry ", module, "_module_entry = {\n" "#if ZEND_MODULE_API_NO > 20010900\n" "    STANDARD_MODULE_HEADER,\n" "#endif\n", NIL);
    Printf(s_init, "    (char*)\"%s\",\n", module);
    Printf(s_init, "    %s_functions,\n", module);
    Printf(s_init, "    PHP_MINIT(%s),\n", module);
    Printf(s_init, "    PHP_MSHUTDOWN(%s),\n", module);
    Printf(s_init, "    PHP_RINIT(%s),\n", module);
    Printf(s_init, "    PHP_RSHUTDOWN(%s),\n", module);
    Printf(s_init, "    PHP_MINFO(%s),\n", module);
    Printf(s_init, "#if ZEND_MODULE_API_NO > 20010900\n");
    Printf(s_init, "    NO_VERSION_YET,\n");
    Printf(s_init, "#endif\n");
    Printf(s_init, "    STANDARD_MODULE_PROPERTIES\n");
    Printf(s_init, "};\n");
    Printf(s_init, "zend_module_entry* SWIG_module_entry = &%s_module_entry;\n\n", module);

    Printf(s_init, "#ifdef __cplusplus\n");
    Printf(s_init, "extern \"C\" {\n");
    Printf(s_init, "#endif\n");
    // We want to write "SWIGEXPORT ZEND_GET_MODULE(%s)" but ZEND_GET_MODULE
    // in PHP5 has "extern "C" { ... }" around it so we can't do that.
    Printf(s_init, "SWIGEXPORT zend_module_entry *get_module(void) { return &%s_module_entry; }\n", module);
    Printf(s_init, "#ifdef __cplusplus\n");
    Printf(s_init, "}\n");
    Printf(s_init, "#endif\n\n");

    /* We have to register the constants before they are (possibly) used
     * by the pointer typemaps. This all needs re-arranging really as
     * things are being called in the wrong order
     */
    Printf(s_init, "#define SWIG_php_minit PHP_MINIT_FUNCTION(%s)\n", module);

    /* Emit all of the code */
    Language::top(n);

    SwigPHP_emit_resource_registrations();
    //    Printv(s_init,s_resourcetypes,NIL);
    /* We need this after all classes written out by ::top */
    Printf(s_oinit, "CG(active_class_entry) = NULL;\n");
    Printf(s_oinit, "/* end oinit subsection */\n");
    Printf(s_init, "%s\n", s_oinit);

    /* Constants generated during top call */
    Printf(s_cinit, "/* end cinit subsection */\n");
    Printf(s_init, "%s\n", s_cinit);
    Clear(s_cinit);
    Delete(s_cinit);

    Printf(s_init, "    return SUCCESS;\n");
    Printf(s_init, "}\n\n");

    // Now do REQUEST init which holds any user specified %rinit, and also vinit
    Printf(s_init, "PHP_RINIT_FUNCTION(%s)\n{\n", module);
    Printf(s_init, "%s\n", r_init);

    /* finish our init section which will have been used by class wrappers */
    Printf(s_vinit, "/* end vinit subsection */\n");
    Printf(s_init, "%s\n", s_vinit);
    Clear(s_vinit);
    Delete(s_vinit);

    Printf(s_init, "    return SUCCESS;\n");
    Printf(s_init, "}\n\n");

    Printv(s_init, "PHP_MSHUTDOWN_FUNCTION(", module, ")\n"
		   "{\n",
		   s_shutdown,
		   "#ifdef ZTS\n"
		   "    ts_free_id(", module, "_globals_id);\n"
		   "#endif\n"
		   "    return SUCCESS;\n"
		   "}\n\n", NIL);

    Printf(s_init, "PHP_RSHUTDOWN_FUNCTION(%s)\n{\n", module);
    Printf(s_init, "%s\n", r_shutdown);
    Printf(s_init, "    return SUCCESS;\n");
    Printf(s_init, "}\n\n");

    Printf(s_init, "PHP_MINFO_FUNCTION(%s)\n{\n", module);
    Printf(s_init, "%s", pragma_phpinfo);
    Printf(s_init, "}\n");
    Printf(s_init, "/* end init section */\n");

    Printf(f_h, "#endif /* PHP_%s_H */\n", cap_module);

    Close(f_h);

    String *type_table = NewStringEmpty();
    SwigType_emit_type_table(f_runtime, type_table);
    Printf(s_header, "%s", type_table);
    Delete(type_table);

    /* Oh dear, more things being called in the wrong order. This whole
     * function really needs totally redoing.
     */

    if (directorsEnabled()) {
      Dump(f_directors_h, f_runtime_h);
      Printf(f_runtime_h, "\n");
      Printf(f_runtime_h, "#endif\n");
      Close(f_runtime_h);
    }

    Printf(s_header, "/* end header section */\n");
    Printf(s_wrappers, "/* end wrapper section */\n");
    Printf(s_vdecl, "/* end vdecl subsection */\n");

    Dump(f_runtime, f_begin);
    Printv(f_begin, s_header, NIL);
    if (directorsEnabled()) {
      Dump(f_directors, f_begin);
    }
    Printv(f_begin, s_vdecl, s_wrappers, NIL);
    Printv(f_begin, all_cs_entry, "\n\n", s_entry,
	" SWIG_ZEND_NAMED_FE(swig_", module, "_alter_newobject,_wrap_swig_", module, "_alter_newobject,NULL)\n"
	" SWIG_ZEND_NAMED_FE(swig_", module, "_get_newobject,_wrap_swig_", module, "_get_newobject,NULL)\n"
	"{NULL, NULL, NULL}\n};\n\n", NIL);
    Printv(f_begin, s_init, NIL);
    Delete(s_header);
    Delete(s_wrappers);
    Delete(s_init);
    Delete(s_vdecl);
    Delete(all_cs_entry);
    Delete(s_entry);
    Close(f_begin);
    Delete(f_runtime);
    Delete(f_begin);

    Printf(f_phpcode, "%s\n%s\n", pragma_incl, pragma_code);
    if (s_fakeoowrappers) {
      Printf(f_phpcode, "abstract class %s {", Len(prefix) ? prefix : module);
      Printf(f_phpcode, "%s", s_fakeoowrappers);
      Printf(f_phpcode, "}\n\n");
      Delete(s_fakeoowrappers);
      s_fakeoowrappers = NULL;
    }
    Printf(f_phpcode, "%s\n?>\n", s_phpclasses);
    Close(f_phpcode);

    return SWIG_OK;
  }

  /* Just need to append function names to function table to register with PHP. */
  void create_command(String *cname, String *iname) {
    // This is for the single main zend_function_entry record
    Printf(f_h, "ZEND_NAMED_FUNCTION(%s);\n", iname);
    String * s = cs_entry;
    if (!s) s = s_entry;
    Printf(s, " SWIG_ZEND_NAMED_FE(%(lower)s,%s,NULL)\n", cname, iname);
  }

  /* ------------------------------------------------------------
   * dispatchFunction()
   * ------------------------------------------------------------ */
  void dispatchFunction(Node *n) {
    /* Last node in overloaded chain */

    int maxargs;
    String *tmp = NewStringEmpty();
    if (Swig_directorclass(n) && wrapperType == directorconstructor) {
      /* We have an extra 'this' parameter. */
      SetFlag(n, "wrap:this");
    }
    String *dispatch = Swig_overload_dispatch(n, "return %s(INTERNAL_FUNCTION_PARAM_PASSTHRU);", &maxargs);

    /* Generate a dispatch wrapper for all overloaded functions */

    Wrapper *f = NewWrapper();
    String *symname = Getattr(n, "sym:name");
    String *wname = Swig_name_wrapper(symname);

    create_command(symname, wname);
    Printv(f->def, "ZEND_NAMED_FUNCTION(", wname, ") {\n", NIL);

    Wrapper_add_local(f, "argc", "int argc");

    Printf(tmp, "zval **argv[%d]", maxargs);
    Wrapper_add_local(f, "argv", tmp);

    Printf(f->code, "argc = ZEND_NUM_ARGS();\n");

    Printf(f->code, "zend_get_parameters_array_ex(argc,argv);\n");

    Replaceall(dispatch, "$args", "self,args");

    Printv(f->code, dispatch, "\n", NIL);

    Printf(f->code, "SWIG_ErrorCode() = E_ERROR;\n");
    Printf(f->code, "SWIG_ErrorMsg() = \"No matching function for overloaded '%s'\";\n", symname);
    Printv(f->code, "zend_error(SWIG_ErrorCode(),\"%s\",SWIG_ErrorMsg());\n", NIL);

    Printv(f->code, "}\n", NIL);
    Wrapper_print(f, s_wrappers);

    DelWrapper(f);
    Delete(dispatch);
    Delete(tmp);
    Delete(wname);
  }

  /* ------------------------------------------------------------
   * functionWrapper()
   * ------------------------------------------------------------ */

  /* Helper method for PHP::functionWrapper */
  bool is_class(SwigType *t) {
    Node *n = classLookup(t);
    if (n) {
      String *r = Getattr(n, "php:proxy");	// Set by classDeclaration()
      if (!r)
	r = Getattr(n, "sym:name");	// Not seen by classDeclaration yet, but this is the name
      if (r)
	return true;
    }
    return false;
  }

  virtual int functionWrapper(Node *n) {
    String *name = GetChar(n, "name");
    String *iname = GetChar(n, "sym:name");
    SwigType *d = Getattr(n, "type");
    ParmList *l = Getattr(n, "parms");
    String *nodeType = Getattr(n, "nodeType");
    int newobject = GetFlag(n, "feature:new");
    int constructor = (Cmp(nodeType, "constructor") == 0);

    Parm *p;
    int i;
    int numopt;
    String *tm;
    Wrapper *f;

    String *wname;
    int overloaded = 0;
    String *overname = 0;

    if (Cmp(nodeType, "destructor") == 0) {
      // We just generate the Zend List Destructor and let Zend manage the
      // reference counting.  There's no explicit destructor, but the user can
      // just do `$obj = null;' to remove a reference to an object.
      return CreateZendListDestructor(n);
    }
    // Test for overloading;
    if (Getattr(n, "sym:overloaded")) {
      overloaded = 1;
      overname = Getattr(n, "sym:overname");
    } else {
      if (!addSymbol(iname, n))
	return SWIG_ERROR;
    }

    wname = Swig_name_wrapper(iname);
    if (overname) {
      Printf(wname, "%s", overname);
    }

    f = NewWrapper();
    numopt = 0;

    String *outarg = NewStringEmpty();
    String *cleanup = NewStringEmpty();

    // Not issued for overloaded functions or static member variables.
    if (!overloaded && wrapperType != staticmembervar) {
      create_command(iname, wname);
    }
    Printv(f->def, "ZEND_NAMED_FUNCTION(", wname, ") {\n", NIL);

    emit_parameter_variables(l, f);
    /* Attach standard typemaps */

    emit_attach_parmmaps(l, f);

    // wrap:parms is used by overload resolution.
    Setattr(n, "wrap:parms", l);

    int num_arguments = emit_num_arguments(l);
    int num_required = emit_num_required(l);
    numopt = num_arguments - num_required;

    if (wrapperType == directorconstructor)
      num_arguments++;

    if (num_arguments > 0) {
      String *args = NewStringEmpty();
      if (wrapperType == directorconstructor)
        Wrapper_add_local(f, "arg0", "zval *arg0");
      Printf(args, "zval **args[%d]", num_arguments);
      Wrapper_add_local(f, "args", args);
      Delete(args);
      args = NULL;
    }
    if (is_member_director(n)) {
      Wrapper_add_local(f, "director", "Swig::Director *director = 0");
      Printf(f->code, "director = dynamic_cast<Swig::Director*>(arg1);\n");
      Wrapper_add_local(f, "upcall", "bool upcall = false");
      Printf(f->code, "upcall = !director->is_overriden_method((char *)\"%s\", (char *)\"%s\");\n",
	  Swig_class_name(Swig_methodclass(n)), name);
    }

    // This generated code may be called:
    // 1) as an object method, or
    // 2) as a class-method/function (without a "this_ptr")
    // Option (1) has "this_ptr" for "this", option (2) needs it as
    // first parameter

    // NOTE: possible we ignore this_ptr as a param for native constructor

    Printf(f->code, "SWIG_ResetError();\n");

    if (numopt > 0) {		// membervariable wrappers do not have optional args
      Wrapper_add_local(f, "arg_count", "int arg_count");
      Printf(f->code, "arg_count = ZEND_NUM_ARGS();\n");
      Printf(f->code, "if(arg_count<%d || arg_count>%d ||\n", num_required, num_arguments);
      Printf(f->code, "   zend_get_parameters_array_ex(arg_count,args)!=SUCCESS)\n");
      Printf(f->code, "\tWRONG_PARAM_COUNT;\n\n");
    } else {
      if (num_arguments == 0) {
	Printf(f->code, "if(ZEND_NUM_ARGS() != 0) {\n");
      } else {
	Printf(f->code, "if(ZEND_NUM_ARGS() != %d || zend_get_parameters_array_ex(%d, args) != SUCCESS) {\n", num_arguments, num_arguments);
      }
      Printf(f->code, "WRONG_PARAM_COUNT;\n}\n\n");
    }
    if (wrapperType == directorconstructor)
      Printf(f->code, "arg0 = *args[0];\n  \n");

    /* Now convert from PHP to C variables */
    // At this point, argcount if used is the number of deliberately passed args
    // not including this_ptr even if it is used.
    // It means error messages may be out by argbase with error
    // reports.  We can either take argbase into account when raising
    // errors, or find a better way of dealing with _thisptr.
    // I would like, if objects are wrapped, to assume _thisptr is always
    // _this and not the first argument.
    // This may mean looking at Language::memberfunctionHandler

    int limit = num_arguments;
    if (wrapperType == directorconstructor)
      limit--;
    for (i = 0, p = l; i < limit; i++) {
      String *source;

      /* Skip ignored arguments */
      //while (Getattr(p,"tmap:ignore")) { p = Getattr(p,"tmap:ignore:next");}
      while (checkAttribute(p, "tmap:in:numinputs", "0")) {
	p = Getattr(p, "tmap:in:next");
      }

      SwigType *pt = Getattr(p, "type");

      if (wrapperType == directorconstructor) {
	source = NewStringf("args[%d]", i+1);
      } else {
	source = NewStringf("args[%d]", i);
      }

      String *ln = Getattr(p, "lname");

      /* Check if optional */
      if (i >= num_required) {
	Printf(f->code, "\tif(arg_count > %d) {\n", i);
      }

      if ((tm = Getattr(p, "tmap:in"))) {
	Replaceall(tm, "$source", source);
	Replaceall(tm, "$target", ln);
	Replaceall(tm, "$input", source);
	Setattr(p, "emit:input", source);
	Printf(f->code, "%s\n", tm);
	if (i == 0 && Getattr(p, "self")) {
	  Printf(f->code, "\tif(!arg1) SWIG_PHP_Error(E_ERROR, \"this pointer is NULL\");\n");
	}
	p = Getattr(p, "tmap:in:next");
	if (i >= num_required) {
	  Printf(f->code, "}\n");
	}
	continue;
      } else {
	Swig_warning(WARN_TYPEMAP_IN_UNDEF, input_file, line_number, "Unable to use type %s as a function argument.\n", SwigType_str(pt, 0));
      }
      if (i >= num_required) {
	Printf(f->code, "\t}\n");
      }
      Delete(source);
    }

    Swig_director_emit_dynamic_cast(n, f);

    /* Insert constraint checking code */
    for (p = l; p;) {
      if ((tm = Getattr(p, "tmap:check"))) {
	Replaceall(tm, "$target", Getattr(p, "lname"));
	Printv(f->code, tm, "\n", NIL);
	p = Getattr(p, "tmap:check:next");
      } else {
	p = nextSibling(p);
      }
    }

    /* Insert cleanup code */
    for (i = 0, p = l; p; i++) {
      if ((tm = Getattr(p, "tmap:freearg"))) {
	Replaceall(tm, "$source", Getattr(p, "lname"));
	Printv(cleanup, tm, "\n", NIL);
	p = Getattr(p, "tmap:freearg:next");
      } else {
	p = nextSibling(p);
      }
    }

    /* Insert argument output code */
    for (i = 0, p = l; p; i++) {
      if ((tm = Getattr(p, "tmap:argout"))) {
	Replaceall(tm, "$source", Getattr(p, "lname"));
	//      Replaceall(tm,"$input",Getattr(p,"lname"));
	Replaceall(tm, "$target", "return_value");
	Replaceall(tm, "$result", "return_value");
	Replaceall(tm, "$arg", Getattr(p, "emit:input"));
	Replaceall(tm, "$input", Getattr(p, "emit:input"));
	Printv(outarg, tm, "\n", NIL);
	p = Getattr(p, "tmap:argout:next");
      } else {
	p = nextSibling(p);
      }
    }

    Setattr(n, "wrap:name", wname);

    /* emit function call */
    String *actioncode = emit_action(n);

    if ((tm = Swig_typemap_lookup_out("out", n, "result", f, actioncode))) {
      Replaceall(tm, "$input", "result");
      Replaceall(tm, "$source", "result");
      Replaceall(tm, "$target", "return_value");
      Replaceall(tm, "$result", "return_value");
      Replaceall(tm, "$owner", newobject ? "1" : "0");
      Printf(f->code, "%s\n", tm);
    } else {
      Swig_warning(WARN_TYPEMAP_OUT_UNDEF, input_file, line_number, "Unable to use return type %s in function %s.\n", SwigType_str(d, 0), name);
    }
    emit_return_variable(n, d, f);

    if (outarg) {
      Printv(f->code, outarg, NIL);
    }

    if (cleanup) {
      Printv(f->code, cleanup, NIL);
    }

    /* Look to see if there is any newfree cleanup code */
    if (GetFlag(n, "feature:new")) {
      if ((tm = Swig_typemap_lookup("newfree", n, "result", 0))) {
	Printf(f->code, "%s\n", tm);
	Delete(tm);
      }
    }

    /* See if there is any return cleanup code */
    if ((tm = Swig_typemap_lookup("ret", n, "result", 0))) {
      Printf(f->code, "%s\n", tm);
      Delete(tm);
    }

    Printf(f->code, "return;\n");

    /* Error handling code */
    Printf(f->code, "fail:\n");
    Printv(f->code, cleanup, NIL);
    Printv(f->code, "zend_error_noreturn(SWIG_ErrorCode(),\"%s\",SWIG_ErrorMsg());", NIL);

    Printf(f->code, "}\n");

    Replaceall(f->code, "$cleanup", cleanup);
    Replaceall(f->code, "$symname", iname);

    Wrapper_print(f, s_wrappers);

    if (overloaded && !Getattr(n, "sym:nextSibling")) {
      dispatchFunction(n);
    }

    Delete(wname);
    wname = NULL;

    if (!shadow) {
      DelWrapper(f);
      return SWIG_OK;
    }

    // Handle getters and setters.
    if (wrapperType == membervar) {
      const char *p = Char(iname);
      if (strlen(p) > 4) {
	p += strlen(p) - 4;
	String *varname = Getattr(n, "membervariableHandler:sym:name");
	if (strcmp(p, "_get") == 0) {
	  Setattr(shadow_get_vars, varname, iname);
	} else if (strcmp(p, "_set") == 0) {
	  Setattr(shadow_set_vars, varname, iname);
	}
      }
    }
    // Only look at non-overloaded methods and the last entry in each overload
    // chain (we check the last so that wrap:parms and wrap:name have been set
    // for them all).
    if (overloaded && Getattr(n, "sym:nextSibling") != 0)
      return SWIG_OK;

    if (!s_oowrappers)
      s_oowrappers = NewStringEmpty();
    if (newobject || wrapperType == memberfn || wrapperType == staticmemberfn || wrapperType == standard) {
      bool handle_as_overload = false;
      String **arg_names;
      String **arg_values;
      // Method or static method or plain function.
      const char *methodname = 0;
      String *output = s_oowrappers;
      if (constructor) {
	class_has_ctor = true;
	methodname = "__construct";
      } else if (wrapperType == memberfn) {
	methodname = Char(Getattr(n, "memberfunctionHandler:sym:name"));
      } else if (wrapperType == staticmemberfn) {
	methodname = Char(Getattr(n, "staticmemberfunctionHandler:sym:name"));
      } else {			// wrapperType == standard
	methodname = Char(iname);
	if (!s_fakeoowrappers)
	  s_fakeoowrappers = NewStringEmpty();
	output = s_fakeoowrappers;
      }

      bool really_overloaded = overloaded ? true : false;
      int min_num_of_arguments = emit_num_required(l);
      int max_num_of_arguments = emit_num_arguments(l);
      // For a function with default arguments, we end up with the fullest
      // parmlist in full_parmlist.
      ParmList *full_parmlist = l;
      Hash *ret_types = NewHash();
      Setattr(ret_types, d, d);

      if (overloaded) {
	// Look at all the overloaded versions of this method in turn to
	// decide if it's really an overloaded method, or just one where some
	// parameters have default values.
	Node *o = Getattr(n, "sym:overloaded");
	while (o) {
	  if (o == n) {
	    o = Getattr(o, "sym:nextSibling");
	    continue;
	  }

	  SwigType *d2 = Getattr(o, "type");
	  if (!d2) {
	    assert(constructor);
	  } else if (!Getattr(ret_types, d2)) {
	    Setattr(ret_types, d2, d2);
	  }

	  ParmList *l2 = Getattr(o, "wrap:parms");
	  int num_arguments = emit_num_arguments(l2);
	  int num_required = emit_num_required(l2);
	  if (num_required < min_num_of_arguments)
	    min_num_of_arguments = num_required;

	  if (num_arguments > max_num_of_arguments) {
	    max_num_of_arguments = num_arguments;
	    full_parmlist = l2;
	  }
	  o = Getattr(o, "sym:nextSibling");
	}

	o = Getattr(n, "sym:overloaded");
	while (o) {
	  if (o == n) {
	    o = Getattr(o, "sym:nextSibling");
	    continue;
	  }

	  ParmList *l2 = Getattr(o, "wrap:parms");
	  Parm *p = l, *p2 = l2;
	  if (wrapperType == memberfn) {
	    p = nextSibling(p);
	    p2 = nextSibling(p2);
	  }
	  while (p && p2) {
	    if (Cmp(Getattr(p, "type"), Getattr(p2, "type")) != 0)
	      break;
	    if (Cmp(Getattr(p, "name"), Getattr(p2, "name")) != 0)
	      break;
	    String *value = Getattr(p, "value");
	    String *value2 = Getattr(p2, "value");
	    if (value && !value2)
	      break;
	    if (!value && value2)
	      break;
	    if (value) {
	      if (Cmp(value, value2) != 0)
		break;
	    }
	    p = nextSibling(p);
	    p2 = nextSibling(p2);
	  }
	  if (p && p2)
	    break;
	  // One parameter list is a prefix of the other, so check that all
	  // remaining parameters of the longer list are optional.
	  if (p2)
	    p = p2;
	  while (p && Getattr(p, "value"))
	    p = nextSibling(p);
	  if (p)
	    break;
	  o = Getattr(o, "sym:nextSibling");
	}
	if (!o) {
	  // This "overloaded method" is really just one with default args.
	  really_overloaded = false;
	  if (l != full_parmlist) {
	    l = full_parmlist;
	    if (wrapperType == memberfn)
	      l = nextSibling(l);
	  }
	}
      }

      if (wrapperType == memberfn) {
	// Allow for the "this" pointer.
	--min_num_of_arguments;
	--max_num_of_arguments;
      }

      arg_names = (String **) malloc(max_num_of_arguments * sizeof(String *));
      if (!arg_names) {
	/* FIXME: How should this be handled?  The rest of SWIG just seems
	 * to not bother checking for malloc failing! */
	fprintf(stderr, "Malloc failed!\n");
	exit(1);
      }
      for (i = 0; i < max_num_of_arguments; ++i) {
	arg_names[i] = NULL;
      }

      arg_values = (String **) malloc(max_num_of_arguments * sizeof(String *));
      if (!arg_values) {
	/* FIXME: How should this be handled?  The rest of SWIG just seems
	 * to not bother checking for malloc failing! */
	fprintf(stderr, "Malloc failed!\n");
	exit(1);
      }
      for (i = 0; i < max_num_of_arguments; ++i) {
	arg_values[i] = NULL;
      }

      Node *o;
      if (overloaded) {
	o = Getattr(n, "sym:overloaded");
      } else {
	o = n;
      }
      while (o) {
	int argno = 0;
	Parm *p = Getattr(o, "wrap:parms");
	if (wrapperType == memberfn)
	  p = nextSibling(p);
	while (p) {
	  if (GetInt(p, "tmap:in:numinputs") == 0) {
	    p = nextSibling(p);
	    continue;
	  }
	  assert(0 <= argno && argno < max_num_of_arguments);
	  String *&pname = arg_names[argno];
	  const char *pname_cstr = GetChar(p, "name");
	  if (!pname_cstr) {
	    // Unnamed parameter, e.g. int foo(int);
	  } else if (pname == NULL) {
	    pname = NewString(pname_cstr);
	  } else {
	    size_t len = strlen(pname_cstr);
	    size_t spc = 0;
	    size_t len_pname = strlen(Char(pname));
	    while (spc + len <= len_pname) {
	      if (strncmp(pname_cstr, Char(pname) + spc, len) == 0) {
		char ch = ((char *) Char(pname))[spc + len];
		if (ch == '\0' || ch == ' ') {
		  // Already have this pname_cstr.
		  pname_cstr = NULL;
		  break;
		}
	      }
	      char *p = strchr(Char(pname) + spc, ' ');
	      if (!p)
		break;
	      spc = (p + 4) - Char(pname);
	    }
	    if (pname_cstr) {
	      Printf(pname, " or_%s", pname_cstr);
	    }
	  }
	  String *value = NewString(Getattr(p, "value"));
	  if (Len(value)) {
	    /* Check that value is a valid constant in PHP (and adjust it if
	     * necessary, or replace it with "?" if it's just not valid). */
	    SwigType *type = Getattr(p, "type");
	    switch (SwigType_type(type)) {
	      case T_BOOL: {
		if (Strcmp(value, "true") == 0 || Strcmp(value, "false") == 0)
		  break;
		char *p;
		errno = 0;
		int n = strtol(Char(value), &p, 0);
	        Clear(value);
		if (errno || *p) {
		  Append(value, "?");
		} else if (n) {
		  Append(value, "true");
		} else {
		  Append(value, "false");
		}
		break;
	      }
	      case T_CHAR:
	      case T_SCHAR:
	      case T_SHORT:
	      case T_INT:
	      case T_LONG: {
		char *p;
		errno = 0;
		unsigned int n = strtol(Char(value), &p, 0);
		(void) n;
		if (errno || *p) {
		  Clear(value);
		  Append(value, "?");
		}
		break;
	      }
	      case T_UCHAR:
	      case T_USHORT:
	      case T_UINT:
	      case T_ULONG: {
		char *p;
		errno = 0;
		unsigned int n = strtoul(Char(value), &p, 0);
		(void) n;
		if (errno || *p) {
		  Clear(value);
		  Append(value, "?");
		}
		break;
	      }
	      case T_FLOAT:
	      case T_DOUBLE:{
		char *p;
		errno = 0;
		/* FIXME: strtod is locale dependent... */
		double val = strtod(Char(value), &p);
		if (errno || *p) {
		  Clear(value);
		  Append(value, "?");
		} else if (strchr(Char(value), '.') == NULL) {
		  // Ensure value is a double constant, not an integer one.
		  Append(value, ".0");
		  double val2 = strtod(Char(value), &p);
		  if (errno || *p || val != val2) {
		    Clear(value);
		    Append(value, "?");
		  }
		}
		break;
	      }
	      case T_REFERENCE:
	      case T_USER:
	      case T_ARRAY:
		Clear(value);
		Append(value, "?");
		break;
	      case T_STRING:
		if (Len(value) < 2) {
		  // How can a string (including "" be less than 2 characters?)
		  Clear(value);
		  Append(value, "?");
		} else {
		  const char *v = Char(value);
		  if (v[0] != '"' || v[Len(value) - 1] != '"') {
		    Clear(value);
		    Append(value, "?");
		  }
		  // Strings containing "$" require special handling, but we do
		  // that later.
		}
		break;
	      case T_VOID:
		assert(false);
		break;
	      case T_POINTER: {
		const char *v = Char(value);
		if (v[0] == '(') {
		  // Handle "(void*)0", "(TYPE*)0", "(char*)NULL", etc.
		  v += strcspn(v + 1, "*()") + 1;
		  if (*v == '*') {
		    do {
		      v++;
		      v += strspn(v, " \t");
		    } while (*v == '*');
		    if (*v++ == ')') {
		      v += strspn(v, " \t");
		      String * old = value;
		      value = NewString(v);
		      Delete(old);
		    }
		  }
		}
		if (Strcmp(value, "NULL") == 0 ||
		    Strcmp(value, "0") == 0 ||
		    Strcmp(value, "0L") == 0) {
		  Clear(value);
		  Append(value, "null");
		} else {
		  Clear(value);
		  Append(value, "?");
		}
		break;
	      }
	    }

	    if (!arg_values[argno]) {
	      arg_values[argno] = value;
	      value = NULL;
	    } else if (Cmp(arg_values[argno], value) != 0) {
	      // If a parameter has two different default values in
	      // different overloaded forms of the function, we can't
	      // set its default in PHP.  Flag this by setting its
	      // default to `?'.
	      Delete(arg_values[argno]);
	      arg_values[argno] = NewString("?");
	    }
	  } else if (arg_values[argno]) {
	    // This argument already has a default value in another overloaded
	    // form, but doesn't in this form.  So don't try to do anything
	    // clever, just let the C wrappers resolve the overload and set the
	    // default values.
	    //
	    // This handling is safe, but I'm wondering if it may be overly
	    // conservative (FIXME) in some cases.  It seems it's only bad when
	    // there's an overloaded form with the appropriate number of
	    // parameters which doesn't want the default value, but I need to
	    // think about this more.
	    Delete(arg_values[argno]);
	    arg_values[argno] = NewString("?");
	  }
	  Delete(value);
	  p = nextSibling(p);
	  ++argno;
	}
	if (!really_overloaded)
	  break;
	o = Getattr(o, "sym:nextSibling");
      }

      /* Clean up any parameters which haven't yet got names, or whose
       * names clash. */
      Hash *seen = NewHash();
      /* We need $this to refer to the current class, so can't allow it
       * to be used as a parameter. */
      Setattr(seen, "this", seen);
      /* We use $r to store the return value, so disallow that as a parameter
       * name in case the user uses the "call-time pass-by-reference" feature
       * (it's deprecated and off by default in PHP5, but we want to be
       * maximally portable).
       */
      Setattr(seen, "r", seen);

      for (int argno = 0; argno < max_num_of_arguments; ++argno) {
	String *&pname = arg_names[argno];
	if (pname) {
	  Replaceall(pname, " ", "_");
	} else {
	  /* We get here if the SWIG .i file has "int foo(int);" */
	  pname = NewStringEmpty();
	  Printf(pname, "arg%d", argno + 1);
	}
	// Check if we've already used this parameter name.
	while (Getattr(seen, pname)) {
	  // Append "_" to clashing names until they stop clashing...
	  Printf(pname, "_");
	}
	Setattr(seen, Char(pname), seen);

	if (arg_values[argno] && Cmp(arg_values[argno], "?") == 0) {
	  handle_as_overload = true;
	}
      }
      Delete(seen);
      seen = NULL;

      String *invoke = NewStringEmpty();
      String *prepare = NewStringEmpty();
      String *args = NewStringEmpty();

      if (!handle_as_overload && !(really_overloaded && max_num_of_arguments > min_num_of_arguments)) {
	Printf(invoke, "%s(", iname);
	if (wrapperType == memberfn) {
	  Printf(invoke, "$this->%s", SWIG_PTR);
	}
	for (int i = 0; i < max_num_of_arguments; ++i) {
	  if (i)
	    Printf(args, ",");
	  if (i || wrapperType == memberfn)
	    Printf(invoke, ",");
	  String *value = arg_values[i];
	  if (value) {
	    const char *v = Char(value);
	    if (v[0] == '"') {
	      /* In a PHP double quoted string, $ needs to be escaped as \$. */
	      Replaceall(value, "$", "\\$");
	    }
	    Printf(args, "$%s=%s", arg_names[i], value);
	  } else {
	    Printf(args, "$%s", arg_names[i]);
	  }
	  Printf(invoke, "$%s", arg_names[i]);
	}
	Printf(invoke, ")");
      } else {
	int i;
	for (i = 0; i < min_num_of_arguments; ++i) {
	  if (i)
	    Printf(args, ",");
	  Printf(args, "$%s", arg_names[i]);
	}
	String *invoke_args = NewStringEmpty();
	if (wrapperType == memberfn) {
	  Printf(invoke_args, "$this->%s", SWIG_PTR);
	  if (min_num_of_arguments > 0)
	    Printf(invoke_args, ",");
	}
	Printf(invoke_args, "%s", args);
	bool had_a_case = false;
	int last_handled_i = i - 1;
	for (; i < max_num_of_arguments; ++i) {
	  if (i)
	    Printf(args, ",");
	  const char *value = Char(arg_values[i]);
	  // FIXME: (really_overloaded && handle_as_overload) is perhaps a
	  // little conservative, but it doesn't hit any cases that it
	  // shouldn't for Xapian at least (and we need it to handle
	  // "Enquire::get_mset()" correctly).
	  bool non_php_default = ((really_overloaded && handle_as_overload) ||
				  !value || strcmp(value, "?") == 0);
	  if (non_php_default)
	    value = "null";
	  Printf(args, "$%s=%s", arg_names[i], value);
	  if (non_php_default) {
	    if (!had_a_case) {
	      Printf(prepare, "\t\tswitch (func_num_args()) {\n");
	      had_a_case = true;
	    }
	    Printf(prepare, "\t\t");
	    while (last_handled_i < i) {
	      Printf(prepare, "case %d: ", ++last_handled_i);
	    }
	    if (Cmp(d, "void") != 0) {
		if ((!directorsEnabled() || !Swig_directorclass(n)) && !newobject) {
		Append(prepare, "$r=");
	      } else {
		Printf(prepare, "$this->%s=", SWIG_PTR);
	      }
	    }
	    if (!directorsEnabled() || !Swig_directorclass(n) || !newobject) {
	      Printf(prepare, "%s(%s); break;\n", iname, invoke_args);
	    } else if (!i) {
	      Printf(prepare, "%s($_this%s); break;\n", iname, invoke_args);
	    } else {
	      Printf(prepare, "%s($_this, %s); break;\n", iname, invoke_args);
	    }
	  }
	  if (i || wrapperType == memberfn)
	    Printf(invoke_args, ",");
	  Printf(invoke_args, "$%s", arg_names[i]);
	}
	Printf(prepare, "\t\t");
	if (had_a_case)
	  Printf(prepare, "default: ");
	if (Cmp(d, "void") != 0) {
	  if ((!directorsEnabled() || !Swig_directorclass(n)) && !newobject) {
	    Append(prepare, "$r=");
	  } else {
	    Printf(prepare, "$this->%s=", SWIG_PTR);
	  }
	}
	if (!directorsEnabled() || !Swig_directorclass(n) || !newobject) {
	  Printf(prepare, "%s(%s);\n", iname, invoke_args);
	} else {
	  Printf(prepare, "%s($_this, %s);\n", iname, invoke_args);
	}
	if (had_a_case)
	  Printf(prepare, "\t\t}\n");
	Delete(invoke_args);
	Printf(invoke, "$r");
      }

      Printf(output, "\n");
      // If it's a member function or a class constructor...
      if (wrapperType == memberfn || (constructor && current_class)) {
	String *acc = Getattr(n, "access");
	if (constructor) {
	  const char * arg0;
	  if (max_num_of_arguments > 0) {
	    arg0 = Char(arg_names[0]);
	  } else {
	    arg0 = "res";
	    Delete(args);
	    args = NewString("$res=null");
	  }
	  SwigType *t = Getattr(current_class, "classtype");
	  String *mangled_type = SwigType_manglestr(SwigType_ltype(t));
	  Printf(output, "\t%s function %s(%s) {\n", acc, methodname, args);
	  Printf(output, "\t\tif (is_resource($%s) && get_resource_type($%s) === '_p%s') {\n", arg0, arg0, mangled_type);
	  Printf(ou…