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/*
* Attribute support code for mini-XML, a small XML-like file parsing library.
*
* Copyright 2003 by Michael Sweet.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Contents:
*
* stp_mxmlElementGetAttr() - Get an attribute.
* stp_mxmlElementSetAttr() - Set an attribute.
*/
/*
* Include necessary headers...
*/
#include <gutenprint/mxml.h>
#include "config.h"
/*
* 'stp_mxmlElementGetAttr()' - Get an attribute.
*
* This function returns NULL if the node is not an element or the
* named attribute does not exist.
*/
const char * /* O - Attribute value or NULL */
stp_mxmlElementGetAttr(stp_mxml_node_t *node, /* I - Element node */
const char *name) /* I - Name of attribute */
{
int i; /* Looping var */
stp_mxml_attr_t *attr; /* Cirrent attribute */
/*
* Range check input...
*/
if (!node || node->type != STP_MXML_ELEMENT || !name)
return (NULL);
/*
* Look for the attribute...
*/
for (i = node->value.element.num_attrs, attr = node->value.element.attrs;
i > 0;
i --, attr ++)
if (!strcmp(attr->name, name))
return (attr->value);
/*
* Didn't find attribute, so return NULL...
*/
return (NULL);
}
/*
* 'stp_mxmlElementSetAttr()' - Set an attribute.
*
* If the named attribute already exists, the value of the attribute
* is replaced by the new string value. The string value is copied
* into the element node. This function does nothing if the node is
* not an element.
*/
void
stp_mxmlElementSetAttr(stp_mxml_node_t *node, /* I - Element node */
const char *name, /* I - Name of attribute */
const char *value) /* I - Attribute value */
{
int i; /* Looping var */
stp_mxml_attr_t *attr; /* New attribute */
/*
* Range check input...
*/
if (!node || node->type != STP_MXML_ELEMENT || !name || !value)
return;
/*
* Look for the attribute...
*/
for (i = node->value.element.num_attrs, attr = node->value.element.attrs;
i > 0;
i --, attr ++)
if (!strcmp(attr->name, name))
{
/*
* Replace the attribute value and return...
*/
free(attr->value);
attr->value = strdup(value);
return;
}
/*
* Attribute not found, so add a new one...
*/
if (node->value.element.num_attrs == 0)
attr = malloc(sizeof(stp_mxml_attr_t));
else
attr = realloc(node->value.element.attrs,
(node->value.element.num_attrs + 1) * sizeof(stp_mxml_attr_t));
if (!attr)
{
fprintf(stderr, "Unable to allocate memory for attribute '%s' in element %s!\n",
name, node->value.element.name);
return;
}
node->value.element.attrs = attr;
attr += node->value.element.num_attrs;
attr->name = strdup(name);
attr->value = strdup(value);
if (!attr->name || !attr->value)
{
if (attr->name)
free(attr->name);
if (attr->value)
free(attr->value);
fprintf(stderr, "Unable to allocate memory for attribute '%s' in element %s!\n",
name, node->value.element.name);
return;
}
node->value.element.num_attrs ++;
}
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