Edit File: tree2.c
/* * section: Tree * synopsis: Creates a tree * purpose: Shows how to create document, nodes and dump it to stdout or file. * usage: tree2 <filename> -Default output: stdout * test: tree2 > tree2.tmp ; diff tree2.tmp tree2.res ; rm tree2.tmp * author: Lucas Brasilino <brasilino@recife.pe.gov.br> * copy: see Copyright for the status of this software */ #include <stdio.h> #include <libxml/parser.h> #include <libxml/tree.h> #if defined(LIBXML_TREE_ENABLED) && defined(LIBXML_OUTPUT_ENABLED) /* *To compile this file using gcc you can type *gcc `xml2-config --cflags --libs` -o tree2 tree2.c */ /* A simple example how to create DOM. Libxml2 automagically * allocates the necessary amount of memory to it. */ int main(int argc, char **argv) { xmlDocPtr doc = NULL; /* document pointer */ xmlNodePtr root_node = NULL, node = NULL, node1 = NULL;/* node pointers */ xmlDtdPtr dtd = NULL; /* DTD pointer */ char buff[256]; int i, j; LIBXML_TEST_VERSION; /* * Creates a new document, a node and set it as a root node */ doc = xmlNewDoc(BAD_CAST "1.0"); root_node = xmlNewNode(NULL, BAD_CAST "root"); xmlDocSetRootElement(doc, root_node); /* * Creates a DTD declaration. Isn't mandatory. */ dtd = xmlCreateIntSubset(doc, BAD_CAST "root", NULL, BAD_CAST "tree2.dtd"); /* * xmlNewChild() creates a new node, which is "attached" as child node * of root_node node. */ xmlNewChild(root_node, NULL, BAD_CAST "node1", BAD_CAST "content of node 1"); /* * The same as above, but the new child node doesn't have a content */ xmlNewChild(root_node, NULL, BAD_CAST "node2", NULL); /* * xmlNewProp() creates attributes, which is "attached" to an node. * It returns xmlAttrPtr, which isn't used here. */ node = xmlNewChild(root_node, NULL, BAD_CAST "node3", BAD_CAST "this node has attributes"); xmlNewProp(node, BAD_CAST "attribute", BAD_CAST "yes"); xmlNewProp(node, BAD_CAST "foo", BAD_CAST "bar"); /* * Here goes another way to create nodes. xmlNewNode() and xmlNewText * creates a node and a text node separately. They are "attached" * by xmlAddChild() */ node = xmlNewNode(NULL, BAD_CAST "node4"); node1 = xmlNewText(BAD_CAST "other way to create content (which is also a node)"); xmlAddChild(node, node1); xmlAddChild(root_node, node); /* * A simple loop that "automates" nodes creation */ for (i = 5; i < 7; i++) { sprintf(buff, "node%d", i); node = xmlNewChild(root_node, NULL, BAD_CAST buff, NULL); for (j = 1; j < 4; j++) { sprintf(buff, "node%d%d", i, j); node1 = xmlNewChild(node, NULL, BAD_CAST buff, NULL); xmlNewProp(node1, BAD_CAST "odd", BAD_CAST((j % 2) ? "no" : "yes")); } } /* * Dumping document to stdio or file */ xmlSaveFormatFileEnc(argc > 1 ? argv[1] : "-", doc, "UTF-8", 1); /*free the document */ xmlFreeDoc(doc); /* *Free the global variables that may *have been allocated by the parser. */ xmlCleanupParser(); /* * this is to debug memory for regression tests */ xmlMemoryDump(); return(0); } #else int main(void) { fprintf(stderr, "tree support not compiled in\n"); exit(1); } #endif
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