182 lines
4.2 KiB
C
182 lines
4.2 KiB
C
/*
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* "$Id: mxml-attr.c 22267 2006-04-24 17:11:45Z kpfleming $"
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*
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* Attribute support code for Mini-XML, a small XML-like file parsing library.
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*
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* Copyright 2003-2005 by Michael Sweet.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Contents:
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*
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* mxmlElementGetAttr() - Get an attribute.
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* mxmlElementSetAttr() - Set an attribute.
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*/
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/*
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* Include necessary headers...
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*/
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#include "config.h"
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#include "mxml.h"
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/*
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* 'mxmlElementGetAttr()' - Get an attribute.
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*
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* This function returns NULL if the node is not an element or the
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* named attribute does not exist.
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*/
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const char * /* O - Attribute value or NULL */
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mxmlElementGetAttr(mxml_node_t *node, /* I - Element node */
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const char *name) /* I - Name of attribute */
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{
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int i; /* Looping var */
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mxml_attr_t *attr; /* Cirrent attribute */
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#ifdef DEBUG
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fprintf(stderr, "mxmlElementGetAttr(node=%p, name=\"%s\")\n",
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node, name ? name : "(null)");
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#endif /* DEBUG */
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/*
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* Range check input...
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*/
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if (!node || node->type != MXML_ELEMENT || !name)
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return (NULL);
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/*
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* Look for the attribute...
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*/
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for (i = node->value.element.num_attrs, attr = node->value.element.attrs;
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i > 0;
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i --, attr ++)
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if (!strcmp(attr->name, name))
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return (attr->value);
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/*
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* Didn't find attribute, so return NULL...
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*/
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return (NULL);
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}
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/*
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* 'mxmlElementSetAttr()' - Set an attribute.
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*
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* If the named attribute already exists, the value of the attribute
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* is replaced by the new string value. The string value is copied
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* into the element node. This function does nothing if the node is
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* not an element.
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*/
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void
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mxmlElementSetAttr(mxml_node_t *node, /* I - Element node */
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const char *name, /* I - Name of attribute */
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const char *value) /* I - Attribute value */
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{
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int i; /* Looping var */
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mxml_attr_t *attr; /* New attribute */
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#ifdef DEBUG
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fprintf(stderr, "mxmlElementSetAttr(node=%p, name=\"%s\", value=\"%s\")\n",
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node, name ? name : "(null)", value ? value : "(null)");
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#endif /* DEBUG */
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/*
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* Range check input...
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*/
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if (!node || node->type != MXML_ELEMENT || !name)
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return;
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/*
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* Look for the attribute...
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*/
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for (i = node->value.element.num_attrs, attr = node->value.element.attrs;
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i > 0;
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i --, attr ++)
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if (!strcmp(attr->name, name))
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{
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/*
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* Replace the attribute value and return...
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*/
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if (attr->value)
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free(attr->value);
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if (value)
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{
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if ((attr->value = strdup(value)) == NULL)
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mxml_error("Unable to allocate memory for attribute '%s' in element %s!",
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name, node->value.element.name);
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}
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else
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attr->value = NULL;
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return;
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}
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/*
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* Attribute not found, so add a new one...
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*/
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if (node->value.element.num_attrs == 0)
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attr = malloc(sizeof(mxml_attr_t));
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else
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attr = realloc(node->value.element.attrs,
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(node->value.element.num_attrs + 1) * sizeof(mxml_attr_t));
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if (!attr)
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{
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mxml_error("Unable to allocate memory for attribute '%s' in element %s!",
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name, node->value.element.name);
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return;
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}
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node->value.element.attrs = attr;
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attr += node->value.element.num_attrs;
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attr->name = strdup(name);
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if (value)
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attr->value = strdup(value);
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else
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attr->value = NULL;
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if (!attr->name || (!attr->value && value))
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{
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if (attr->name)
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free(attr->name);
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if (attr->value)
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free(attr->value);
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mxml_error("Unable to allocate memory for attribute '%s' in element %s!",
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name, node->value.element.name);
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return;
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}
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node->value.element.num_attrs ++;
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}
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/*
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* End of "$Id: mxml-attr.c 22267 2006-04-24 17:11:45Z kpfleming $".
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*/
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