Removing string manipulation functions from manga.c.

We now use the gobject MgUtilString for that.

include/openmg/util/string.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <glib-object.h>
+
+G_BEGIN_DECLS;
+
+#define MG_TYPE_UTIL_STRING mg_util_string_get_type()
+G_DECLARE_FINAL_TYPE (MgUtilString, mg_util_string, MG, UTIL_STRING, GObject)
+
+MgUtilString *mg_util_string_new ();
+char *
+mg_util_string_alloc_string(MgUtilString *self, size_t len);
+void
+mg_util_string_copy_substring(MgUtilString *self,
+        const char *origin, char *dest, size_t dest_len, size_t start,
+        size_t len);
+
+G_END_DECLS

src/util/string.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+
+#include <glib-object.h>
+
+#include <openmg/util/string.h>
+
+struct _MgUtilString {
+    GObject parent_instance;
+};
+
+G_DEFINE_TYPE (MgUtilString, mg_util_string, G_TYPE_OBJECT)
+
+static void
+mg_util_string_class_init (MgUtilStringClass *class) {
+}
+
+static void
+mg_util_string_init (MgUtilString *class) {
+}
+
+void
+mg_util_string_copy_substring(MgUtilString *self,
+        const char *origin, char *dest, size_t dest_len, size_t start,
+        size_t len) {
+    size_t copying_offset = 0;
+    while (copying_offset < len) {
+        if (!(start+copying_offset <=dest_len)) {
+            fprintf(stderr, "Read attempt out of bounds.%ld %ld %ld\n", dest_len, start, len);
+            break;
+        }
+        dest[copying_offset] = origin[start+copying_offset];
+        copying_offset++;
+    }
+    dest[len] = '\0';
+}
+
+char *
+mg_util_string_alloc_string(MgUtilString *self, size_t len) {
+    char * return_value = NULL;
+    return g_malloc (len + 1 * sizeof *return_value);
+}
+
+MgUtilString *
+mg_util_string_new () {
+    MgUtilString *self = NULL;
+    self = MG_UTIL_STRING ((g_object_new (MG_TYPE_UTIL_STRING, NULL)));
+    return self;
+}