1 /* 2 * section: Tree 3 * synopsis: Creates a tree 4 * purpose: Shows how to create document, nodes and dump it to stdout or file. 5 * usage: tree2 <filename> -Default output: stdout 6 * test: tree2 > tree2.tmp && diff tree2.tmp $(srcdir)/tree2.res 7 * author: Lucas Brasilino <brasilino (at) recife.pe.gov.br> 8 * copy: see Copyright for the status of this software 9 */ 10 11 #include <stdio.h> 12 #include <libxml/parser.h> 13 #include <libxml/tree.h> 14 15 #if defined(LIBXML_TREE_ENABLED) && defined(LIBXML_OUTPUT_ENABLED) 16 17 /* 18 *To compile this file using gcc you can type 19 *gcc `xml2-config --cflags --libs` -o tree2 tree2.c 20 */ 21 22 /* A simple example how to create DOM. Libxml2 automagically 23 * allocates the necessary amount of memory to it. 24 */ 25 int 26 main(int argc, char **argv) 27 { 28 xmlDocPtr doc = NULL; /* document pointer */ 29 xmlNodePtr root_node = NULL, node = NULL, node1 = NULL;/* node pointers */ 30 xmlDtdPtr dtd = NULL; /* DTD pointer */ 31 char buff[256]; 32 int i, j; 33 34 LIBXML_TEST_VERSION; 35 36 /* 37 * Creates a new document, a node and set it as a root node 38 */ 39 doc = xmlNewDoc(BAD_CAST "1.0"); 40 root_node = xmlNewNode(NULL, BAD_CAST "root"); 41 xmlDocSetRootElement(doc, root_node); 42 43 /* 44 * Creates a DTD declaration. Isn't mandatory. 45 */ 46 dtd = xmlCreateIntSubset(doc, BAD_CAST "root", NULL, BAD_CAST "tree2.dtd"); 47 48 /* 49 * xmlNewChild() creates a new node, which is "attached" as child node 50 * of root_node node. 51 */ 52 xmlNewChild(root_node, NULL, BAD_CAST "node1", 53 BAD_CAST "content of node 1"); 54 /* 55 * The same as above, but the new child node doesn't have a content 56 */ 57 xmlNewChild(root_node, NULL, BAD_CAST "node2", NULL); 58 59 /* 60 * xmlNewProp() creates attributes, which is "attached" to an node. 61 * It returns xmlAttrPtr, which isn't used here. 62 */ 63 node = 64 xmlNewChild(root_node, NULL, BAD_CAST "node3", 65 BAD_CAST "this node has attributes"); 66 xmlNewProp(node, BAD_CAST "attribute", BAD_CAST "yes"); 67 xmlNewProp(node, BAD_CAST "foo", BAD_CAST "bar"); 68 69 /* 70 * Here goes another way to create nodes. xmlNewNode() and xmlNewText 71 * creates a node and a text node separately. They are "attached" 72 * by xmlAddChild() 73 */ 74 node = xmlNewNode(NULL, BAD_CAST "node4"); 75 node1 = xmlNewText(BAD_CAST 76 "other way to create content (which is also a node)"); 77 xmlAddChild(node, node1); 78 xmlAddChild(root_node, node); 79 80 /* 81 * A simple loop that "automates" nodes creation 82 */ 83 for (i = 5; i < 7; i++) { 84 sprintf(buff, "node%d", i); 85 node = xmlNewChild(root_node, NULL, BAD_CAST buff, NULL); 86 for (j = 1; j < 4; j++) { 87 sprintf(buff, "node%d%d", i, j); 88 node1 = xmlNewChild(node, NULL, BAD_CAST buff, NULL); 89 xmlNewProp(node1, BAD_CAST "odd", BAD_CAST((j % 2) ? "no" : "yes")); 90 } 91 } 92 93 /* 94 * Dumping document to stdio or file 95 */ 96 xmlSaveFormatFileEnc(argc > 1 ? argv[1] : "-", doc, "UTF-8", 1); 97 98 /*free the document */ 99 xmlFreeDoc(doc); 100 101 /* 102 *Free the global variables that may 103 *have been allocated by the parser. 104 */ 105 xmlCleanupParser(); 106 107 /* 108 * this is to debug memory for regression tests 109 */ 110 xmlMemoryDump(); 111 return(0); 112 } 113 #else 114 int main(void) { 115 fprintf(stderr, "tree support not compiled in\n"); 116 exit(1); 117 } 118 #endif 119
