/* * "$Id: mxml-attr.c 22267 2006-04-24 17:11:45Z kpfleming $" * * Attribute support code for Mini-XML, a small XML-like file parsing library. * * Copyright 2003-2005 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: * * mxmlElementGetAttr() - Get an attribute. * mxmlElementSetAttr() - Set an attribute. */ /* * Include necessary headers... */ #include "config.h" #include "mxml.h" /* * '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 */ mxmlElementGetAttr(mxml_node_t *node, /* I - Element node */ const char *name) /* I - Name of attribute */ { int i; /* Looping var */ mxml_attr_t *attr; /* Cirrent attribute */ #ifdef DEBUG fprintf(stderr, "mxmlElementGetAttr(node=%p, name=\"%s\")\n", node, name ? name : "(null)"); #endif /* DEBUG */ /* * Range check input... */ if (!node || node->type != 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); } /* * '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 mxmlElementSetAttr(mxml_node_t *node, /* I - Element node */ const char *name, /* I - Name of attribute */ const char *value) /* I - Attribute value */ { int i; /* Looping var */ mxml_attr_t *attr; /* New attribute */ #ifdef DEBUG fprintf(stderr, "mxmlElementSetAttr(node=%p, name=\"%s\", value=\"%s\")\n", node, name ? name : "(null)", value ? value : "(null)"); #endif /* DEBUG */ /* * Range check input... */ if (!node || node->type != MXML_ELEMENT || !name) 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... */ if (attr->value) free(attr->value); if (value) { if ((attr->value = strdup(value)) == NULL) mxml_error("Unable to allocate memory for attribute '%s' in element %s!", name, node->value.element.name); } else attr->value = NULL; return; } /* * Attribute not found, so add a new one... */ if (node->value.element.num_attrs == 0) attr = malloc(sizeof(mxml_attr_t)); else attr = realloc(node->value.element.attrs, (node->value.element.num_attrs + 1) * sizeof(mxml_attr_t)); if (!attr) { mxml_error("Unable to allocate memory for attribute '%s' in element %s!", name, node->value.element.name); return; } node->value.element.attrs = attr; attr += node->value.element.num_attrs; attr->name = strdup(name); if (value) attr->value = strdup(value); else attr->value = NULL; if (!attr->name || (!attr->value && value)) { if (attr->name) free(attr->name); if (attr->value) free(attr->value); mxml_error("Unable to allocate memory for attribute '%s' in element %s!", name, node->value.element.name); return; } node->value.element.num_attrs ++; } /* * End of "$Id: mxml-attr.c 22267 2006-04-24 17:11:45Z kpfleming $". */
