php-src/ext/xslt/xslt.c

/*
   +----------------------------------------------------------------------+
   | PHP Version 4                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2002 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.02 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available at through the world-wide-web at                           |
   | http://www.php.net/license/2_02.txt.                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Sterling Hughes <sterling@php.net>                           |
   +----------------------------------------------------------------------+
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_xslt.h"

#if HAVE_XSLT

#include <stdio.h>
#include <string.h>
#include <stdarg.h>

#define XSLT_DEBUG 0

/* {{{ xslt_debug() 
   Output a debug message if debugging is enabled */
extern void xslt_debug(char *function_name, char *format, ...)
{
#if DEBUG
	va_list argv;
	char    buffer[1024];

    va_start(argv, format);
	vsnprintf(buffer, sizeof(buffer) - 1, format, argv);
    va_end(argv);

	buffer[sizeof(buffer) - 1] = '\0';

	php_printf("<b>XSLT Debug</b>: %s: %s<br />\n", 
	           function_name, buffer);
#endif
}
/* }}} */

/* {{{ find_xslt_argument()
   Find and return an xslt argument from the argument buffer */
static char *_find_xslt_argument(const char **argv, const char *key)
{
	char  **ptr;                  /* Pointer to the passed char ** array */
	char   *return_value = NULL;  /* Value to return from the function */

    if (! argv)
        return NULL;
    
	/* Loop through the array searching for the value */
	ptr = (char **) argv;
	while (*ptr) {
		/* If we have a match, save the value and exit out */
		if (! strcmp(*ptr, key)) {
			return_value = estrdup(*ptr);
			break;
		}

		++ptr;
	}

	return return_value;
}
/* }}} */

/* {{{ xslt_make_array() 
   Make an XSLT array (char **) from a zval array (HashTable *) */
extern void xslt_make_array(zval **zarr, char ***carr)
{
	zval      **current;
	HashTable  *arr;
	int         idx = 0;
	TSRMLS_FETCH();

	/* Skip a warning, when 'NULL' is provided as argument */
	if ( Z_TYPE_PP(zarr) == IS_NULL)
		return;

	arr = HASH_OF(*zarr);
	if (! arr) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid argument or parameter array");
		return;
	}

	*carr = emalloc(((zend_hash_num_elements(arr) * 2) + 1) * sizeof(char *));

	for (zend_hash_internal_pointer_reset(arr);
	     zend_hash_get_current_data(arr, (void **) &current) == SUCCESS;
	     zend_hash_move_forward(arr)) {
		char  *string_key = NULL;
		ulong  num_key;		
		int    type;

		SEPARATE_ZVAL(current);
		convert_to_string_ex(current);

		type = zend_hash_get_current_key(arr, &string_key, &num_key, 0);
		if (type == HASH_KEY_IS_LONG) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid key value for argument or parameter array");
			/* Make the next index NULL, so it signals the end of the array
				this will protect against invalid arrays, like:
				array('foo'=>'bar', 'foobarred', 'oops') */
			(*carr)[idx] = NULL;
			return;
		}

		(*carr)[idx++] = estrdup(string_key);
		(*carr)[idx++] = estrndup(Z_STRVAL_PP(current), Z_STRLEN_PP(current));
	}

	(*carr)[idx] = NULL;
}
/* }}} */

/* {{{ xslt_free_array()
   Free an xslt array built by xslt_make_array() */
extern void xslt_free_array(char **arr)
{
	char **ptr = arr;

	while (*ptr != NULL) {
		efree(*ptr);
		ptr++;
	}

	efree(arr);
}
/* }}} */

/* {{{ xslt_parse_arguments()
   Parse an XSLT argument buffer */
extern xslt_args *xslt_parse_arguments(char  *xml, 
                                       char  *xsl, 
                                       char  *result, 
                                       char **argv)
{
	xslt_args *return_value;  /* The value to return from the function */

	return_value = emalloc(sizeof(xslt_args));

	/* The xml argument */
	if (! strncasecmp(xml, "arg:", 4)) {
		char *key = xml + 5;

		return_value->xml.type = XSLT_IS_DATA;
		return_value->xml.ptr  = _find_xslt_argument((const char **) argv, 
		                                             (const char *)  key);
	}
	else {
		return_value->xml.type = XSLT_IS_FILE;
		return_value->xml.ptr  = estrdup(xml);
	}

	/* The xslt arguments */
	if (! strncasecmp(xsl, "arg:", 4)) {
		char *key = xsl + 5;

		return_value->xsl.type = XSLT_IS_DATA;
		return_value->xsl.ptr  = _find_xslt_argument((const char **) argv, 
		                                             (const char *)  key);
	}
	else {
		return_value->xsl.type = XSLT_IS_FILE;
		return_value->xsl.ptr  = estrdup(xsl);
	}

	/* The result argument */
	if (! strncasecmp(result, "arg:", 4)) {
		char *key = result + 5;

		return_value->result.type = XSLT_IS_DATA;
		return_value->result.ptr  = _find_xslt_argument((const char **) argv, 
		                                                (const char *)  key);
	}
	else {
		return_value->result.type = XSLT_IS_FILE;
		return_value->result.ptr  = estrdup(result);
	}

	return return_value;
}
/* }}} */

/* {{{ free_xslt_arguments()
   Free's an XSLT argument list returned from parse_xslt_arguments() */
extern void xslt_free_arguments(xslt_args *to_free)
{
	if (to_free->xml.ptr) {
		efree(to_free->xml.ptr);
	}
	
	if (to_free->xsl.ptr) {
		efree(to_free->xsl.ptr);
	}
	
	if (to_free->result.ptr) {
		efree(to_free->result.ptr);
	}
	
	efree(to_free);
}
/* }}} */

/* {{{ call_xslt_function()
   Call an XSLT handler */
extern void xslt_call_function(char *name, 
                               zval *function, 
                               zval *object,
                               int argc, 
                               zval **user_args, 
                               zval **retval)
{
	zval   ***argv;      /* Argument container, maps around for call_user_function_ex() */
	int       error;     /* Error container */
	int       idx;       /* Idx, when looping through and free'ing the arguments */
	TSRMLS_FETCH();      /* For TS mode, fetch the executor globals */

	argv = emalloc(argc * sizeof(zval **));
	for (idx = 0; idx < argc; idx++) {
		argv[idx] = &user_args[idx];
	}
	

	/* Call the function (with object when appropriate)*/
	if (object == NULL)
	{
		error = call_user_function_ex(EG(function_table),
					      NULL, function,
					      retval, argc, argv, 0, NULL TSRMLS_CC);
	}
	else
	{
		error = call_user_function_ex(EG(function_table),
					      &object, function,
					      retval, argc, argv, 0, NULL TSRMLS_CC);
	}

	if (error == FAILURE) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot call the %s handler: %s", 
		          name, Z_STRVAL_P(function));
	}

	/* Cleanup arguments */
	for (idx = 0; idx < argc; idx++) {
		/* Decrease refcount and free if refcount is <= 0 */
		zval_ptr_dtor(argv[idx]);
	}

	efree(argv);
}
/* }}} */

#endif

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