mirror of
https://github.com/michaelrsweet/mxml.git
synced 2024-11-08 13:39:58 +00:00
337baeddb5
Prep for new "standard" opaque, integer, etc. callbacks. Add new vsnprintf check. Drop old string function checks for functions we don't actually use.
733 lines
15 KiB
C
733 lines
15 KiB
C
/*
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* "$Id: mxml-node.c,v 1.8 2003/09/28 12:44:39 mike Exp $"
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*
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* Node support code for mini-XML, a small XML-like file parsing library.
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*
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* Copyright 2003 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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* mxmlAdd() - Add a node to a tree.
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* mxmlDelete() - Delete a node and all of its children.
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* mxmlNewElement() - Create a new element node.
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* mxmlNewInteger() - Create a new integer node.
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* mxmlNewOpaque() - Create a new opaque string.
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* mxmlNewReal() - Create a new real number node.
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* mxmlNewText() - Create a new text fragment node.
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* mxmlNewTextf() - Create a new formatted text fragment node.
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* mxmlRemove() - Remove a node from its parent.
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* mxmlSetElement() - Set the name of an element node.
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* mxmlSetInteger() - Set the value of an integer node.
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* mxmlSetOpaque() - Set the value of an opaque node.
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* mxmlSetReal() - Set the value of a real number node.
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* mxmlSetText() - Set the value of a text node.
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* mxmlSetTextf() - Set the value of a text node to a formatted string.
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* mxml_new() - Create a new node.
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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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* Local functions...
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*/
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static mxml_node_t *mxml_new(mxml_node_t *parent, mxml_type_t type);
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/*
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* 'mxmlAdd()' - Add a node to a tree.
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*
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* Adds the specified node to the parent. If the child argument is not
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* NULL, puts the new node before or after the specified child depending
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* on the value of the where argument. If the child argument is NULL,
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* puts the new node at the beginning of the child list (MXML_ADD_BEFORE)
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* or at the end of the child list (MXML_ADD_AFTER). The constant
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* MXML_ADD_TO_PARENT can be used to specify a NULL child pointer.
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*/
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void
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mxmlAdd(mxml_node_t *parent, /* I - Parent node */
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int where, /* I - Where to add, MXML_ADD_BEFORE or MXML_ADD_AFTER */
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mxml_node_t *child, /* I - Child node for where or MXML_ADD_TO_PARENT */
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mxml_node_t *node) /* I - Node to add */
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{
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/* fprintf(stderr, "mxmlAdd(parent=%p, where=%d, child=%p, node=%p)\n", parent,
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where, child, node);*/
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/*
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* Range check input...
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*/
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if (!parent || !node)
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return;
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/*
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* Remove the node from any existing parent...
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*/
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if (node->parent)
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mxmlRemove(node);
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/*
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* Reset pointers...
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*/
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node->parent = parent;
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switch (where)
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{
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case MXML_ADD_BEFORE :
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if (!child || child == parent->child || child->parent != parent)
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{
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/*
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* Insert as first node under parent...
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*/
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node->next = parent->child;
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if (parent->child)
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parent->child->prev = node;
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else
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parent->last_child = node;
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parent->child = node;
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}
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else
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{
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/*
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* Insert node before this child...
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*/
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node->next = child;
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node->prev = child->prev;
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if (child->prev)
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child->prev->next = node;
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else
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parent->child = node;
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child->prev = node;
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}
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break;
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case MXML_ADD_AFTER :
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if (!child || child == parent->last_child || child->parent != parent)
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{
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/*
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* Insert as last node under parent...
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*/
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node->parent = parent;
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node->prev = parent->last_child;
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if (parent->last_child)
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parent->last_child->next = node;
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else
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parent->child = node;
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parent->last_child = node;
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}
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else
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{
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/*
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* Insert node after this child...
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*/
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node->prev = child;
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node->next = child->next;
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if (child->next)
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child->next->prev = node;
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else
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parent->last_child = node;
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child->next = node;
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}
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break;
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}
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}
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/*
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* 'mxmlDelete()' - Delete a node and all of its children.
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*
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* If the specified node has a parent, this function first removes the
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* node from its parent using the mxmlRemove() function.
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*/
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void
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mxmlDelete(mxml_node_t *node) /* I - Node to delete */
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{
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int i; /* Looping var */
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/* fprintf(stderr, "mxmlDelete(node=%p)\n", node);*/
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/*
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* Range check input...
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*/
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if (!node)
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return;
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/*
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* Remove the node from its parent, if any...
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*/
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mxmlRemove(node);
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/*
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* Delete children...
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*/
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while (node->child)
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mxmlDelete(node->child);
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/*
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* Now delete any node data...
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*/
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switch (node->type)
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{
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case MXML_ELEMENT :
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if (node->value.element.name)
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free(node->value.element.name);
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if (node->value.element.num_attrs)
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{
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for (i = 0; i < node->value.element.num_attrs; i ++)
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{
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if (node->value.element.attrs[i].name)
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free(node->value.element.attrs[i].name);
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if (node->value.element.attrs[i].value)
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free(node->value.element.attrs[i].value);
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}
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free(node->value.element.attrs);
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}
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break;
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case MXML_INTEGER :
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/* Nothing to do */
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break;
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case MXML_OPAQUE :
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if (node->value.opaque)
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free(node->value.opaque);
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break;
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case MXML_REAL :
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/* Nothing to do */
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break;
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case MXML_TEXT :
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if (node->value.text.string)
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free(node->value.text.string);
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break;
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}
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/*
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* Free this node...
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*/
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free(node);
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}
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/*
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* 'mxmlNewElement()' - Create a new element node.
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*
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* The new element node is added to the end of the specified parent's child
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* list. The constant MXML_NO_PARENT can be used to specify that the new
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* element node has no parent.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewElement(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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const char *name) /* I - Name of element */
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{
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mxml_node_t *node; /* New node */
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/*
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* Range check input...
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*/
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if (!name)
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return (NULL);
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/*
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* Create the node and set the element name...
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*/
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if ((node = mxml_new(parent, MXML_ELEMENT)) != NULL)
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node->value.element.name = strdup(name);
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return (node);
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}
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/*
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* 'mxmlNewInteger()' - Create a new integer node.
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*
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* The new integer node is added to the end of the specified parent's child
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* list. The constant MXML_NO_PARENT can be used to specify that the new
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* integer node has no parent.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewInteger(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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int integer) /* I - Integer value */
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{
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mxml_node_t *node; /* New node */
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/*
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* Range check input...
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*/
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if (!parent)
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return (NULL);
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/*
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* Create the node and set the element name...
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*/
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if ((node = mxml_new(parent, MXML_INTEGER)) != NULL)
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node->value.integer = integer;
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return (node);
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}
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/*
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* 'mxmlNewOpaque()' - Create a new opaque string.
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*
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* The new opaque node is added to the end of the specified parent's child
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* list. The constant MXML_NO_PARENT can be used to specify that the new
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* opaque node has no parent. The opaque string must be nul-terminated and
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* is copied into the new node.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewOpaque(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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const char *opaque) /* I - Opaque string */
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{
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mxml_node_t *node; /* New node */
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/*
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* Range check input...
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*/
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if (!parent || !opaque)
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return (NULL);
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/*
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* Create the node and set the element name...
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*/
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if ((node = mxml_new(parent, MXML_OPAQUE)) != NULL)
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node->value.opaque = strdup(opaque);
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return (node);
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}
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/*
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* 'mxmlNewReal()' - Create a new real number node.
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*
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* The new real number node is added to the end of the specified parent's
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* child list. The constant MXML_NO_PARENT can be used to specify that
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* the new real number node has no parent.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewReal(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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double real) /* I - Real number value */
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{
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mxml_node_t *node; /* New node */
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/*
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* Range check input...
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*/
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if (!parent)
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return (NULL);
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/*
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* Create the node and set the element name...
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*/
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if ((node = mxml_new(parent, MXML_REAL)) != NULL)
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node->value.real = real;
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return (node);
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}
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/*
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* 'mxmlNewText()' - Create a new text fragment node.
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*
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* The new text node is added to the end of the specified parent's child
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* list. The constant MXML_NO_PARENT can be used to specify that the new
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* text node has no parent. The whitespace parameter is used to specify
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* whether leading whitespace is present before the node. The text
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* string must be nul-terminated and is copied into the new node.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewText(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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int whitespace, /* I - 1 = leading whitespace, 0 = no whitespace */
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const char *string) /* I - String */
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{
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mxml_node_t *node; /* New node */
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/*
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* Range check input...
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*/
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if (!parent || !string)
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return (NULL);
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/*
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* Create the node and set the text value...
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*/
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if ((node = mxml_new(parent, MXML_TEXT)) != NULL)
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{
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node->value.text.whitespace = whitespace;
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node->value.text.string = strdup(string);
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}
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return (node);
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}
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/*
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* 'mxmlNewTextf()' - Create a new formatted text fragment node.
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*
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* The new text node is added to the end of the specified parent's child
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* list. The constant MXML_NO_PARENT can be used to specify that the new
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* text node has no parent. The whitespace parameter is used to specify
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* whether leading whitespace is present before the node. The format
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* string must be nul-terminated and is formatted into the new node.
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*/
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mxml_node_t * /* O - New node */
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mxmlNewTextf(mxml_node_t *parent, /* I - Parent node or MXML_NO_PARENT */
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int whitespace, /* I - 1 = leading whitespace, 0 = no whitespace */
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const char *format, /* I - Printf-style frmat string */
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...) /* I - Additional args as needed */
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{
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mxml_node_t *node; /* New node */
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va_list ap; /* Pointer to arguments */
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/*
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* Range check input...
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*/
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if (!parent || !format)
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return (NULL);
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/*
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* Create the node and set the text value...
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*/
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if ((node = mxml_new(parent, MXML_TEXT)) != NULL)
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{
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va_start(ap, format);
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node->value.text.whitespace = whitespace;
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node->value.text.string = mxml_strdupf(format, ap);
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va_end(ap);
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}
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return (node);
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}
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/*
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* 'mxmlRemove()' - Remove a node from its parent.
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*
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* Does not free memory used by the node - use mxmlDelete() for that.
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* This function does nothing if the node has no parent.
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*/
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void
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mxmlRemove(mxml_node_t *node) /* I - Node to remove */
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{
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/*
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* Range check input...
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*/
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/* fprintf(stderr, "mxmlRemove(node=%p)\n", node);*/
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if (!node || !node->parent)
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return;
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/*
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* Remove from parent...
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*/
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if (node->prev)
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node->prev->next = node->next;
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else
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node->parent->child = node->next;
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if (node->next)
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node->next->prev = node->prev;
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else
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node->parent->last_child = node->prev;
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node->parent = NULL;
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node->prev = NULL;
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node->next = NULL;
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}
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/*
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* 'mxmlSetElement()' - Set the name of an element node.
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*
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* If the node is not changed if it is not an element node.
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*/
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int /* O - 0 on success, -1 on failure */
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mxmlSetElement(mxml_node_t *node, /* I - Node to set */
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const char *name) /* I - New name string */
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{
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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 (-1);
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/*
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* Free any old element value and set the new value...
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*/
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if (node->value.element.name)
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free(node->value.element.name);
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node->value.element.name = strdup(name);
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return (0);
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}
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|
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/*
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* 'mxmlSetInteger()' - Set the value of an integer node.
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*
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* If the node is not changed if it is not an integer node.
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*/
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int /* O - 0 on success, -1 on failure */
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mxmlSetInteger(mxml_node_t *node, /* I - Node to set */
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int integer) /* I - Integer value */
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{
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/*
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* Range check input...
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*/
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if (!node || node->type != MXML_INTEGER)
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return (-1);
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/*
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* Set the new value and return...
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*/
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node->value.integer = integer;
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return (0);
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}
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|
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/*
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* 'mxmlSetOpaque()' - Set the value of an opaque node.
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*
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* If the node is not changed if it is not an opaque node.
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*/
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int /* O - 0 on success, -1 on failure */
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mxmlSetOpaque(mxml_node_t *node, /* I - Node to set */
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const char *opaque) /* I - Opaque string */
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{
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/*
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* Range check input...
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*/
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if (!node || node->type != MXML_OPAQUE || !opaque)
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return (-1);
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/*
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* Free any old opaque value and set the new value...
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*/
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if (node->value.opaque)
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free(node->value.opaque);
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node->value.opaque = strdup(opaque);
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return (0);
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}
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|
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/*
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* 'mxmlSetReal()' - Set the value of a real number node.
|
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*
|
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* If the node is not changed if it is not a real number node.
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*/
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|
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int /* O - 0 on success, -1 on failure */
|
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mxmlSetReal(mxml_node_t *node, /* I - Node to set */
|
|
double real) /* I - Real number value */
|
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{
|
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/*
|
|
* Range check input...
|
|
*/
|
|
|
|
if (!node || node->type != MXML_REAL)
|
|
return (-1);
|
|
|
|
/*
|
|
* Set the new value and return...
|
|
*/
|
|
|
|
node->value.real = real;
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* 'mxmlSetText()' - Set the value of a text node.
|
|
*
|
|
* If the node is not changed if it is not a text node.
|
|
*/
|
|
|
|
int /* O - 0 on success, -1 on failure */
|
|
mxmlSetText(mxml_node_t *node, /* I - Node to set */
|
|
int whitespace, /* I - 1 = leading whitespace, 0 = no whitespace */
|
|
const char *string) /* I - String */
|
|
{
|
|
/*
|
|
* Range check input...
|
|
*/
|
|
|
|
if (!node || node->type != MXML_TEXT || !string)
|
|
return (-1);
|
|
|
|
/*
|
|
* Free any old string value and set the new value...
|
|
*/
|
|
|
|
if (node->value.text.string)
|
|
free(node->value.text.string);
|
|
|
|
node->value.text.whitespace = whitespace;
|
|
node->value.text.string = strdup(string);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* 'mxmlSetTextf()' - Set the value of a text node to a formatted string.
|
|
*
|
|
* If the node is not changed if it is not a text node.
|
|
*/
|
|
|
|
int /* O - 0 on success, -1 on failure */
|
|
mxmlSetTextf(mxml_node_t *node, /* I - Node to set */
|
|
int whitespace, /* I - 1 = leading whitespace, 0 = no whitespace */
|
|
const char *format, /* I - Printf-style format string */
|
|
...) /* I - Additional arguments as needed */
|
|
{
|
|
va_list ap; /* Pointer to arguments */
|
|
|
|
|
|
/*
|
|
* Range check input...
|
|
*/
|
|
|
|
if (!node || node->type != MXML_TEXT || !format)
|
|
return (-1);
|
|
|
|
/*
|
|
* Free any old string value and set the new value...
|
|
*/
|
|
|
|
if (node->value.text.string)
|
|
free(node->value.text.string);
|
|
|
|
va_start(ap, format);
|
|
|
|
node->value.text.whitespace = whitespace;
|
|
node->value.text.string = mxml_strdupf(format, ap);
|
|
|
|
va_end(ap);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* 'mxml_new()' - Create a new node.
|
|
*/
|
|
|
|
static mxml_node_t * /* O - New node */
|
|
mxml_new(mxml_node_t *parent, /* I - Parent node */
|
|
mxml_type_t type) /* I - Node type */
|
|
{
|
|
mxml_node_t *node; /* New node */
|
|
|
|
|
|
/*
|
|
* Allocate memory for the node...
|
|
*/
|
|
|
|
if ((node = calloc(1, sizeof(mxml_node_t))) == NULL)
|
|
return (NULL);
|
|
|
|
/*
|
|
* Set the node type...
|
|
*/
|
|
|
|
node->type = type;
|
|
|
|
/*
|
|
* Add to the parent if present...
|
|
*/
|
|
|
|
if (parent)
|
|
mxmlAdd(parent, MXML_ADD_AFTER, MXML_ADD_TO_PARENT, node);
|
|
|
|
/*
|
|
* Return the new node...
|
|
*/
|
|
|
|
return (node);
|
|
}
|
|
|
|
|
|
/*
|
|
* End of "$Id: mxml-node.c,v 1.8 2003/09/28 12:44:39 mike Exp $".
|
|
*/
|