implement null object

* null object mapped to NULL
* use lowercase for json_t members

Author: recp

include/json/common.h

@@ -49,8 +49,8 @@ typedef struct json_t {
   struct json_t *next;
   const char    *key;
   void          *value;
-  int            valSize;
-  int            keySize;
+  int            valsize;
+  int            keysize;
   json_type_t    type;
 } json_t;
 

include/json/impl/impl_json.h

@@ -85,7 +85,7 @@ json_parse(const char * __restrict contents, bool reverse) {
 
         if (key) {
           obj->key     = key;
-          obj->keySize = keysize;
+          obj->keysize = keysize;
           key          = NULL;
         }
 
@@ -194,7 +194,7 @@ json_parse(const char * __restrict contents, bool reverse) {
 
           if (key) {
             val->key     = key;
-            val->keySize = keysize;
+            val->keysize = keysize;
             key          = NULL;
           }
 
@@ -237,9 +237,22 @@ json_parse(const char * __restrict contents, bool reverse) {
               c = *++p;
             }
           }
+
+          val->valsize = (int)(end - (char *)val->value);
+
+          if (!foundQuote && val->valsize == 4) {
+            char *n;
+
+            /* check if it is null */
+            n = val->value;
+
+            if (n[0] == 'n' && n[1] == 'u' && n[2] == 'l' && n[3] == 'l') {
+              val->value   = NULL;
+              val->valsize = 0;
+            }
+          }
 
-          val->valSize = (int)(end - (char *)val->value);
-          c            = *p;
+          c = *p;
 
           goto again;
         } /* if lookingForKey */

include/json/print.h

@@ -37,10 +37,10 @@ json_print_ex(FILE   * __restrict ostream,
         fprintf(ostream, "\t");
 
       if (json->key)
-        fprintf(ostream, "\"%.*s\": ", json->keySize, json->key);
+        fprintf(ostream, "\"%.*s\": ", json->keysize, json->key);
     } else {
       if (json->key)
-        fprintf(ostream, "\"%.*s\":", json->keySize, json->key);
+        fprintf(ostream, "\"%.*s\":", json->keysize, json->key);
     }
 
     switch (json->type) {
@@ -62,7 +62,10 @@ json_print_ex(FILE   * __restrict ostream,
         break;
 
       case JSON_STRING:
-        fprintf(ostream, "\"%.*s\"", json->valSize, json_string(json));
+        if (json->value)
+          fprintf(ostream, "\"%.*s\"", json->valsize, json_string(json));
+        else
+          fprintf(ostream, "null");
 
         if (json->next)
           fprintf(ostream, ",");

include/json/util.h

@@ -171,9 +171,9 @@ char*
 json_string_dup(const json_t * __restrict object) {
   char *s;
 
-  s = malloc(object->valSize + 1);
-  memcpy(s, object->value, object->valSize);
-  s[object->valSize] = '\0';
+  s = malloc(object->valsize + 1);
+  memcpy(s, object->value, object->valsize);
+  s[object->valsize] = '\0';
 
   return s;
 }
@@ -190,7 +190,7 @@ bool
 json_key_eq(const json_t * __restrict obj, const char * __restrict str) {
   size_t strsize;
 
-  if ((strsize = strlen(str)) != (size_t)obj->keySize)
+  if ((strsize = strlen(str)) != (size_t)obj->keysize)
     return false;
 
   return strncmp(str, obj->key, strsize) == 0;
@@ -209,7 +209,7 @@ bool
 json_key_eqsz(const json_t * __restrict obj,
               const char   * __restrict str,
               size_t                    strsize) {
-  if (strsize != (size_t)obj->keySize)
+  if (strsize != (size_t)obj->keysize)
     return false;
 
   return strncmp(str, obj->key, strsize) == 0;
@@ -227,7 +227,7 @@ bool
 json_val_eq(const json_t * __restrict obj, const char * __restrict str) {
   size_t strsize;
 
-  if ((strsize = strlen(str)) != (size_t)obj->valSize)
+  if ((strsize = strlen(str)) != (size_t)obj->valsize)
     return false;
 
   return strncmp(str, obj->value, strsize) == 0;
@@ -246,7 +246,7 @@ bool
 json_val_eqsz(const json_t * __restrict obj,
               const char   * __restrict str,
               size_t                    strsize) {
-  if (strsize != (size_t)obj->valSize)
+  if (strsize != (size_t)obj->valsize)
     return false;
 
   return strncmp(str, obj->value, strsize) == 0;