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359
ipld.h
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359
ipld.h
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#ifndef IPLD_HEADER_H
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#define IPLD_HEADER_H
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#include <stdio.h>
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#include <string.h>
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#include <jansson.h>
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//Predefined values:
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#define IDKey "@id"
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#define TypeKey "@type"
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#define ValueKey "@value"
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#define CtxKey "@context"
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#define CodecKey "@codec"
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#define LinkKey "mlink"
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int NODE_H_DEBUG = 0; //Turn this on if you want to debug the program
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/* Node struct
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* obj = json_t A jansson json object.
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* node_size = size of the node
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*/
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struct NODE
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{
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json_t * obj;
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size_t node_size;
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};
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/* LOAD_NODE(@param1)
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* Creates a new node from a string.
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* @Param1 a json string(char *)
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* returns a json_t object! (jansson.h)
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*/
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struct NODE LOAD_NODE(char * str)
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{
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struct NODE X;
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json_error_t error;
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X.obj = json_loads(str, 0, &error);
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X.node_size = strlen(str);
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return X;
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}
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/* Unload_Node(@pa for(int i=0; i<linknum; i++)
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{
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printf("AT %d %s\n",i,links[i]);
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}ram1)
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* Well, really easy, after being done with a struct if you don't want memory leaks..
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* you're supposed to free them, so use this to unload the node you create.
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* @param1 = node you previously created with NEW_NODE
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*/
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void UNLOAD_NODE(struct NODE X)
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{
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json_decref(X.obj);
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}
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/* ntype(@param1, @param2)
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* @param1 = the string which will hold the result.
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* @param2 = NODE.object to get result from.
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* sets param 1 to @type, if any, stored as char* (supposed to be mlink!)
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* also sets str to NULL for your error checking purposes.
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*/
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void nType(char * str, json_t * O)
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{
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json_t * proc;
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proc = json_object_get(O, TypeKey);
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if(proc)
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{
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json_t * value;
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const char * key;
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json_object_foreach(O, key, value)
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{
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if(strcmp(key, TypeKey) == 0)
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{
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const char * sval;
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sval = json_string_value(value);
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("Value: %s\nLength: %lu\n", sval, strlen(sval));
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}
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//END_DEBUG
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for(int i=0; i<=strlen(sval); i++)
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{
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str[i] = sval[i];
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if(i==strlen(sval))
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{
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str[i] = '\0';
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}
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}
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}
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}
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}
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else
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{
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str = NULL; //For your own error checking purposes
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}
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}
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/* nContext(@oaram1, @param2)
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* Context is a convenience method to retrieve the JSON-LD-style context
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* @Param1 = char * to hold result
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* @Param2 = NODE.obj to get result from
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* returns NULL if nothing
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*/
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void nContext(char * str, json_t * O)
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{
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json_t * proc;
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proc = json_object_get(O, CtxKey);
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if(proc)
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{
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json_t * value;
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const char * key;
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json_object_foreach(O, key, value)
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{
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if(strcmp(key, CtxKey) == 0)
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{
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const char * sval;
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sval = json_string_value(value);
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("Value: %s\nLength: %lu\n", sval, strlen(sval));
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}
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//END_DEBUG
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for(int i=0; i<=strlen(sval); i++)
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{
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str[i] = sval[i];
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if(i==strlen(sval))
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{
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str[i] = '\0';
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}
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}
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}
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}
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}
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else
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{
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str = NULL; //For your own error checking purposes
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}
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}
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/*nLinks(@param1, @param2)
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*@Param1 = pointer array to store results in. (doesn't handle memory allocation!)
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*@Param2 = object to get results from!
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*
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*RETURNS LINK AMMOUNTS VERY IMPORTANT FOR FREEING THE MEMORY.
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* VERY IMPORTANT! always free your entire pointer array!
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* should be used as such size_t a = nlinks(@param1,@param2)
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*/
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size_t nLinks(char ** links, json_t * O)
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{
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size_t links_ammount;
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links_ammount = 0;
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json_t * value;
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const char * key;
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json_object_foreach(O, key, value)
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{
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char * checker = NULL;
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checker = json_dumps(value, JSON_INDENT(0));
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("Checker: %s\n", checker);
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}
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//END_DEBUG
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if(!checker && strcmp(key, TypeKey) == 0 && strcmp(json_string_value(value), "mlink") == 0)
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{
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printf("Warning: Premature Link Found!\n");
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}
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else if(checker)
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{
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//This key is the name of the field.
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const char * keyname = key;
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("CHECK ACTIVE LINK: %s\n", key);
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}
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//END_DEBUG
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//checking individual fields for correct format.
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const char * typeoflink;
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typeoflink == NULL;
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const char * valueoflink;
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valueoflink == NULL;
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//foreachprep
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json_t * indvalue;
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const char * indkey;
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//endofprep
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json_object_foreach(value, indkey, indvalue)
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{
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char * checker2 = NULL;
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checker2 = json_dumps(indvalue, JSON_INDENT(0));
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("CHECKER_2: %s\n", checker2);
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}
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//END_DEBUG
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//I don't know how to do this yet so I'm letting this here for when I will.
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//Feel free to butt in guys :)
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if(checker2)//If another node is here.
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{
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//TO DO
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}
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else
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{
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if(strcmp(indkey, TypeKey) == 0)
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{
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typeoflink = indkey;
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}
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else if(strcmp(indkey, ValueKey) == 0)
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{
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valueoflink = indkey;
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}
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}
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}
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("Results: %s: %s && %s\n", keyname,typeoflink, valueoflink);
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}
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//END_DEBUG
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if(keyname && typeoflink && valueoflink)
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{
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links[links_ammount] = (char*)malloc(1000);
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bzero(links[links_ammount],1000);
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char * muhe = json_dumps(value, JSON_INDENT(0));
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sprintf(links[links_ammount], "{\"%s\": %s}", key,muhe);
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links_ammount++;
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free(muhe);
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}
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}
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free(checker);
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}
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return links_ammount;
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}
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/* Link struct - Same as node, except made this way for easier structuring, better human readability
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* and avoiding memory errors/leaks
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* obj = json_t A jansson json object.
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* node_size = size of the node
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*/
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struct LINK
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{
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int valid;
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json_t * obj;
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size_t link_size;
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char name[100];
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char type[100];
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char hash[100];
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char b58hash[1000];
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};
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/* lType(@param1,@param2)
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* Gets the type of the link, of course, it should be an mlink.
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* @param1: LINK.type //Storing in type from LINK struct.
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* @param2: LINK // The link structure we are using.
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*/
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void lType(char * str, struct LINK O)
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{
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json_t * value;
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const char * key;
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json_object_foreach(O.obj, key, value)
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{
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json_t * value2;
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const char * key2;
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json_object_foreach(value, key2, value2)
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{
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if(strcmp(key2,TypeKey)==0)
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{
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const char * sval;
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sval = json_string_value(value2);
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("lType: %s\n", sval);
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}
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strcpy(str,sval);
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}
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}
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}
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}
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/* lType(@param1,@param2)
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* Gets the type of the link, of course, it should be an mlink.
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* @param1: LINK.type //Storing in type from LINK struct.
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* @param2: LINK // The link structure we are using.
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*/
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void lHash(char * str, struct LINK O)
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{
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json_t * value;
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const char * key;
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json_object_foreach(O.obj, key, value)
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{
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json_t * value2;
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const char * key2;
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json_object_foreach(value, key2, value2)
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{
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if(strcmp(key2,ValueKey)==0)
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{
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const char * sval;
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sval = json_string_value(value2);
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//DEBUG
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if(NODE_H_DEBUG == 1)
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{
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printf("lHash: %s\n", sval);
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}
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strcpy(str,sval);
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}
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}
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}
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}
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/* lname(@param1,@param2)
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* Gets the name of the link {>Field1<:{}}
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* @param1: LINK.name //Storing in type from LINK struct.
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* @param2: LINK // The link structure we are using.
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*/
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void lName(char * str, struct LINK O)
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{
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json_t * value;
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const char * key;
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json_object_foreach(O.obj, key, value)
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{
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if(NODE_H_DEBUG == 1)
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{
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printf("lName: %s\n", key);
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}
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strcat(str, key);
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}
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}
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/* LOAD_LINK(@param1)
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* Creates a new LINK from a string.
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* @Param1 a json string(char *)
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* returns a json_t object! (jansson.h)
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* This is made to also give you easy access to any part of the link.
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* It will have LINK.valid = 0 if it's not a valid link, you should check for this always.
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*/
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struct LINK LOAD_LINK(char * str)
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{
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struct LINK X;
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json_error_t error;
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X.obj = json_loads(str, 0, &error);
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X.link_size = strlen(str);
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bzero(X.type,100);
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bzero(X.name,100);
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bzero(X.hash,100);
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bzero(X.b58hash,1000);
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lName(X.name, X);
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lType(X.type, X);
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lHash(X.hash, X);
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return X;
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}
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/* Unload_LINK(@param1) - Same as unload_node, makes it easier to avoid leaks and better structuring of your programs
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* Well, really easy, after being done with a struct if you don't want memory leaks..
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* you're supposed to free them, so use this to unload the node you create.
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* this design makes it easier to read and mentain a good program architecture.
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* @param1 = node you previously created with NEW_NODE
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*/
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void UNLOAD_LINK(struct LINK X)
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{
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json_decref(X.obj);
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}
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#endif
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