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Annotation of embedaddon/libxml2/doc/examples/tree1.c, revision 1.1

1.1     ! misho       1: /**
        !             2:  * section: Tree
        !             3:  * synopsis: Navigates a tree to print element names
        !             4:  * purpose: Parse a file to a tree, use xmlDocGetRootElement() to
        !             5:  *          get the root element, then walk the document and print
        !             6:  *          all the element name in document order.
        !             7:  * usage: tree1 filename_or_URL
        !             8:  * test: tree1 test2.xml > tree1.tmp ; diff tree1.tmp tree1.res ; rm tree1.tmp
        !             9:  * author: Dodji Seketeli
        !            10:  * copy: see Copyright for the status of this software.
        !            11:  */
        !            12: #include <stdio.h>
        !            13: #include <libxml/parser.h>
        !            14: #include <libxml/tree.h>
        !            15: 
        !            16: #ifdef LIBXML_TREE_ENABLED
        !            17: 
        !            18: /*
        !            19:  *To compile this file using gcc you can type
        !            20:  *gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c
        !            21:  */
        !            22: 
        !            23: /**
        !            24:  * print_element_names:
        !            25:  * @a_node: the initial xml node to consider.
        !            26:  *
        !            27:  * Prints the names of the all the xml elements
        !            28:  * that are siblings or children of a given xml node.
        !            29:  */
        !            30: static void
        !            31: print_element_names(xmlNode * a_node)
        !            32: {
        !            33:     xmlNode *cur_node = NULL;
        !            34: 
        !            35:     for (cur_node = a_node; cur_node; cur_node = cur_node->next) {
        !            36:         if (cur_node->type == XML_ELEMENT_NODE) {
        !            37:             printf("node type: Element, name: %s\n", cur_node->name);
        !            38:         }
        !            39: 
        !            40:         print_element_names(cur_node->children);
        !            41:     }
        !            42: }
        !            43: 
        !            44: 
        !            45: /**
        !            46:  * Simple example to parse a file called "file.xml", 
        !            47:  * walk down the DOM, and print the name of the 
        !            48:  * xml elements nodes.
        !            49:  */
        !            50: int
        !            51: main(int argc, char **argv)
        !            52: {
        !            53:     xmlDoc *doc = NULL;
        !            54:     xmlNode *root_element = NULL;
        !            55: 
        !            56:     if (argc != 2)
        !            57:         return(1);
        !            58: 
        !            59:     /*
        !            60:      * this initialize the library and check potential ABI mismatches
        !            61:      * between the version it was compiled for and the actual shared
        !            62:      * library used.
        !            63:      */
        !            64:     LIBXML_TEST_VERSION
        !            65: 
        !            66:     /*parse the file and get the DOM */
        !            67:     doc = xmlReadFile(argv[1], NULL, 0);
        !            68: 
        !            69:     if (doc == NULL) {
        !            70:         printf("error: could not parse file %s\n", argv[1]);
        !            71:     }
        !            72: 
        !            73:     /*Get the root element node */
        !            74:     root_element = xmlDocGetRootElement(doc);
        !            75: 
        !            76:     print_element_names(root_element);
        !            77: 
        !            78:     /*free the document */
        !            79:     xmlFreeDoc(doc);
        !            80: 
        !            81:     /*
        !            82:      *Free the global variables that may
        !            83:      *have been allocated by the parser.
        !            84:      */
        !            85:     xmlCleanupParser();
        !            86: 
        !            87:     return 0;
        !            88: }
        !            89: #else
        !            90: int main(void) {
        !            91:     fprintf(stderr, "Tree support not compiled in\n");
        !            92:     exit(1);
        !            93: }
        !            94: #endif