Better blob handling (also better debug viewing)

src/db_column.c

@@ -240,8 +240,13 @@ void freeColumn(struct column_data_t *col)
   if (col->hasPointers) {
     for (unsigned int r = 0; r < col->n_values; r++) {
       if (!columnRowIsNull(col, r)) {
+        if (col->type == TYPE_STRING) {
           free(*(col->data.ptr_str + r));
           *(col->data.ptr_str + r) = 0;
+        } else {
+          free(*(col->data.ptr_blob + r));
+          *(col->data.ptr_blob + r) = 0;
+        }
       }
     }
 
@@ -378,12 +383,13 @@ int setColumnValue(struct column_data_t *col, uint64_t row, const char *value, s
     case TYPE_BLOB:
     case TYPE_RAW:
     {
-      *(col->data.ptr_str + row) = (char *)malloc(value_size);
-      if (*(col->data.ptr_str + row) == 0) {
+      *(col->data.ptr_blob + row) = (char *)malloc(value_size);
+      if (*(col->data.ptr_blob + row) == 0) {
         fprintf(stderr, "[%d]malloc: (%d) %s\n", __LINE__, errno, strerror(errno));
         return -errno;
       }
-      memcpy(*(col->data.ptr_str + row), value, value_size);
+      memcpy(*(col->data.ptr_blob + row), value, value_size);
+      *(col->data_lens + row) = value_size;
       break;
     }
   }

src/db_column.h

@@ -66,6 +66,8 @@ struct column_data_t {
     double *ptr_double;
 
     char **ptr_str;
+
+    char **ptr_blob;
   } data;
   size_t *data_lens;
 

src/db_value.c

@@ -116,13 +116,15 @@ void db_value_sbva(str_builder *sb, e_column_type type, uint32_t n_args, va_list
 
     tmp_len = va_arg(args, size_t);
 
-    esc_str = (char *)malloc(tmp_len * 2 + 1);
+    esc_str = (char *)malloc(tmp_len * 2 + 1 + 2);
     if (esc_str == 0) {
       fprintf(stderr, "[%d]malloc: (%d) %s\n", __LINE__, errno, strerror(errno));
       return;
     }
 
-    esc_len = mysql_hex_string(esc_str, tmp_str, tmp_len);
+    esc_str[0] = '0';
+    esc_str[1] = 'x';
+    esc_len = mysql_hex_string(esc_str + 2, tmp_str, tmp_len);
     strbld_str(sb, esc_str, esc_len);
     free(esc_str);
     return;