+ added handlers for integer/string objects and some yajl init functions

src/torrent2json.c

@@ -14,9 +14,72 @@
 FILE *in;
 FILE *out;
 
-void (*handler)(void);
+struct yajl_gen_t *gen = NULL;
 
-void (*select_handler(char chr))(void)
+/* object handler prototype */
+void (*handler)(char);
+
+void
+get_integer(char chr)
+{ /* 'chr' always 'i' in this case */
+  int c = '\0';
+  bool cont = true;
+  long int value = 0; /* signed */
+
+  while (cont)
+  {
+    if (!cont) break;
+
+    c = fgetc(in);
+    switch ((isdigit(c) != 0) ? '0' : c) /* little hack here */
+    {
+      case '0' :
+        value *= 10; /* (0 * 10) -> 0, so it works correct */
+        value += c - '0';
+        break;
+      case '-' :
+      value *= -1;
+        break;
+      case 'e' : /* integer end marker */
+      default  : /* or garbled data    */
+        cont = false;
+        break;
+    }
+  }
+
+  yajl_gen_integer(gen, value);
+}
+
+void
+get_string(char chr)
+{
+  /* in this case 'chr' first digit of string lenght */
+  unsigned int len = (unsigned char) chr - '0';
+  int c = '\0';
+  int i = 0;
+  unsigned char *buf = NULL;
+
+  /* first, get string lenght */
+  while (isdigit((c = fgetc(in))))
+    len *= 10, len += c - '0';
+  /* 'c' now should contain ':' */
+
+  if ((buf = malloc(sizeof(char) * len + 1)) == NULL)
+  {
+    fprintf(stderr, "Can't allocate memory, exiting.\n");
+    exit(EXIT_FAILURE);
+  }
+
+  memset(buf, '\0', len + 1);
+  for (i = 0; i <= len; i++)
+    *(buf + i * sizeof(char)) = fgetc(in);
+
+  yajl_gen_string(gen, buf, len);
+
+  free(buf);
+}
+
+void (*select_handler(char chr))(char)
 {
   handler = NULL;
 
@@ -44,16 +107,26 @@ int
 main(int argc, char **argv)
 {
   int chr = '\0';
+  const unsigned char *buf = NULL;
+  size_t len = 0;
 
   in  = stdin;
   out = stdout;
 
+  gen = yajl_gen_alloc(NULL);
+  yajl_gen_config(gen, yajl_gen_beautify,         1);
+  yajl_gen_config(gen, yajl_gen_indent_string, "  ");
+
   while ((chr = fgetc(in)) != EOF);
   {
     handler = select_handler(chr);
-    handler();
+    handler(chr);
   }
 
+  yajl_gen_get_buf(gen, &buf, &len);
+  fprintf(out, "%s", buf);
+  yajl_gen_free(gen);
+
   exit(EXIT_SUCCESS);
 }