added example

examples/parse-file.c

@@ -4,7 +4,52 @@
 #include <ctype.h>
 #include "xjson.h"
 
-char *load_file(const char *path, int *len)
+static char *load_file(const char *path, int *len);
+
+int main(int argc, char **argv)
+{
+    if(argc < 2)
+    {
+        fprintf(stderr, "Error: Missing file\n");
+        fprintf(stderr, "Usage: %s <file>\n", argv[0]);
+        return 1;
+    }
+
+    int   size;
+    char *data;
+
+    data = load_file(argv[1], &size);
+    if(data == NULL)
+    {
+        fprintf(stderr, "Error: Failed to load file\n");
+        return 1;
+    }
+
+    char pool[65536];
+    xj_alloc *alloc;
+
+    alloc = xj_alloc_using(pool, sizeof(pool), 4096, NULL);
+    assert(alloc != NULL);
+
+    xj_error error;
+    xj_value *val = xj_decode(data, size, alloc, &error);
+
+    if(val == NULL)
+    {
+        if(error.off < 0)
+            fprintf(stderr, "Error: %s\n", error.message);
+        else
+            fprintf(stderr, "Error %s:%d:%d: %s\n", argv[1], error.row+1, error.col+1, error.message);
+    }
+    else
+        fprintf(stderr, "OK\n");
+
+    xj_alloc_del(alloc);
+    free(data);
+    return 0;
+}
+
+static char *load_file(const char *path, int *len)
 {
     FILE *fp = fopen(path, "rb");
 
@@ -37,48 +82,4 @@ char *load_file(const char *path, int *len)
     if(len)
         *len = len_;
     return data;
-}
-
-int main(int argc, char **argv)
-{
-    if(argc < 2)
-    {
-        fprintf(stderr, "Error: Missing file\n");
-        fprintf(stderr, "Usage: %s <file>\n", argv[0]);
-        return 1;
-    }
-
-    int   size;
-    char *data = load_file(argv[1], &size);
-
-    if(data == NULL)
-    {
-        fprintf(stderr, "Error: Failed to load file\n");
-        return 1;
-    }
-
-    char pool[65536];
-    xj_error  error;
-
-    xj_alloc *alloc = xj_alloc_using(pool, sizeof(pool), 4096, NULL);
-    assert(alloc != NULL);
-
-    xj_value *val = xj_decode(data, size, alloc, &error);
-
-    if(val == NULL)
-    {
-        if(error.off < 0)
-            fprintf(stderr, "Error: %s\n", error.message);
-        else
-            fprintf(stderr, "Error %s:%d:%d: %s\n", argv[1], error.row+1, error.col+1, error.message);
-        xj_alloc_del(alloc);
-        free(data);
-        return 1;
-    }
-
-    fprintf(stderr, "OK\n");
-
-    xj_alloc_del(alloc);
-    free(data);
-    return 0;
-}
+}

examples/simple.c

@@ -0,0 +1,44 @@
+#include <string.h>
+#include <stdio.h>
+#include <xjson.h>
+
+int main()
+{
+    // Instanciate the allocator.
+    xj_alloc *alloc = xj_alloc_new(65536, 4096);
+
+    if(alloc == NULL)
+        // Handle failure maybe?
+        return 1;
+
+    char *str = "{\"name\": \"Francesco\", \"age\": 23}";
+
+    // Do the actual parsing..
+    xj_value *val = xj_decode(str, -1, alloc, NULL);
+
+    // ..error?
+    if(val == NULL)
+        fprintf(stderr, "Failed to parse!\n");
+    
+    char *name;
+    int   age;
+
+    // Now iterate over the fields to get the name
+    // and age.
+    xj_value *child = val->as_object;
+    while(child != NULL)
+    {
+        if(!strcmp("name", child->key))
+            name = child->as_string;
+        else
+            age = child->as_int;
+
+        child = child->next;
+    }
+
+    printf("name: %s, age: %d\n", name, age);
+
+    // Now free everything!
+    xj_alloc_del(alloc);
+    return 0;
+}