Refactoring a little to make the code easier to change.

mangafox.c

@@ -11,6 +11,8 @@
 
 #include <manga.h>
 
+#define XML_COPY_NODE_RECURSIVE 2 | 1
+
 const char *mangafox_url =
 "https://mangafox.fun";
 struct String {
@@ -41,7 +43,7 @@ print_classes (const char *class_attribute,
         size_t class_attribute_size);
 int
 has_class (const char *class_attribute,
-		char *class_to_check);
+        const char *class_to_check);
 void
 splitted_string_free (struct SplittedString *splitted_string);
 
@@ -53,7 +55,15 @@ iterate_string_to_split(struct SplittedString *splitted_string, pcre2_code *re,
         size_t subject_size, size_t *start_pos, size_t *offset);
 char *
 get_request (const char *url, gsize *size_response_text);
-
+xmlNodePtr *
+loop_search_class(const xmlNodePtr node, xmlNodePtr *nodes,
+        const char * class, size_t *len);
+void
+print_debug_nodes (const xmlDocPtr html_document,
+        xmlNodePtr *nodes, size_t nodes_len);
+xmlNodePtr *
+find_all_manga_slide(const xmlDocPtr html_document,
+        size_t *len);
 void
 retrieve_mangafox_title () {
     xmlDocPtr html_response;
@@ -110,37 +120,77 @@ get_request (const char *url, gsize *size_response_text) {
 struct Manga *
 parse_main_mangafox_page (const xmlDocPtr html_document,
         const size_t *size) {
-	xmlIndentTreeOutput = 1;
+    xmlNodePtr *nodes;
-	xmlXPathObjectPtr xpath_result = get_nodes_xpath_expression (html_document,
+    size_t nodes_len = 0;
+
+    nodes = find_all_manga_slide (html_document, &nodes_len);
+    print_debug_nodes (html_document, nodes, nodes_len);
+}
+
+void
+print_debug_nodes (const xmlDocPtr html_document,
+        xmlNodePtr *nodes, size_t nodes_len) {
+    xmlBufferPtr buffer = xmlBufferCreate ();
+    for (int i = 0; i < nodes_len; i++) {
+        xmlNodeDump (buffer, html_document, nodes[i],
+                0, 1);
+    }
+    xmlBufferDump (stdout, buffer);
+    xmlBufferFree (buffer);
+}
+
+xmlNodePtr *
+find_all_manga_slide(const xmlDocPtr html_document,
+        size_t *len) {
+    xmlNodeSetPtr node_set;
+    xmlNodePtr *nodes;
+    xmlXPathObjectPtr xpath_result;
+
+    node_set = NULL;
+    nodes = NULL;
+    xpath_result = get_nodes_xpath_expression (html_document,
             "//div[@class]");
+
     if (!xpath_result) {
         fprintf(stderr, "Empty xpath result\n");
-		return NULL;
+        goto cleanup_find_all_manga_slide;
     }
-	xmlNodeSetPtr node_set = xpath_result->nodesetval;
+    node_set = xpath_result->nodesetval;
     if (!node_set) {
         fprintf(stderr, "No match\n");
-		return NULL;
+        goto cleanup_find_all_manga_slide; 
     }
     for (int i = 0; i < node_set->nodeNr; i++) {
         xmlNodePtr node = node_set->nodeTab[i];
-		for (xmlAttr *attrs = node->properties; attrs; attrs=attrs->next) {
+        nodes = loop_search_class (node, nodes, "manga-slide", len);
-			if (!xmlStrcmp(attrs->name, (const xmlChar *)"class") 
-					&& attrs->children && attrs->children->content) {
-				const char *content = (char *) attrs->children->content;
-				if (has_class (content, "manga-slide")) {
-					printf("%s\n", content);
-				}
-			}
     }
+cleanup_find_all_manga_slide:
+    xmlXPathFreeObject (xpath_result);
+
+    return nodes;
+
 }
 
-	xmlXPathFreeObject (xpath_result);
+xmlNodePtr *
+loop_search_class(const xmlNodePtr node, xmlNodePtr *nodes,
+        const char * class, size_t *len) {
+    for (xmlAttr *attr = node->properties; attr; attr=attr->next) {
+        if (!xmlStrcmp(attr->name, (const xmlChar *)"class") 
+                && attr->children && attr->children->content) {
+            const char *content = (char *) attr->children->content;
+            if (has_class (content, class)) {
+                (*len)++;
+                nodes = g_realloc (nodes, (sizeof *nodes) * *len);
+                nodes[(*len)-1] = xmlCopyNode(node, XML_COPY_NODE_RECURSIVE);
+            }
+        }
+    }
+    return nodes;
 }
 
 int
 has_class (const char *class_attribute,
-		char *class_to_check) {
+        const char *class_to_check) {
     char *re = "\\s+";
     struct SplittedString *classes;
     int return_value = 0;
@@ -275,10 +325,6 @@ get_nodes_xpath_expression (const xmlDocPtr document, char *xpath) {
     xmlXPathObjectPtr result;
 
     context = xmlXPathNewContext (document);
-	if (!context) {
-		fprintf(stderr, "Error in xmlXpathNewContext\n");
-		return NULL;
-	}
     result = xmlXPathEvalExpression ((const xmlChar *)xpath, context);
 
     xmlXPathFreeContext (context);