1 files changed, 119 insertions, 0 deletions
diff --git a/src/attribute.cpp b/src/attribute.cpp
new file mode 100644
index 0000000..4458713
--- /dev/null
+++ b/src/attribute.cpp
@@ -0,0 +1,119 @@
+#include "attribute.hpp"
+
+#include "utils.hpp"
+#include <stdlib.h>
+#include <string.h>
+
+
+XiftAttributes::XiftAttributes(): stack(0)
+{}
+
+XiftAttributes::~XiftAttributes()
+{
+    while (stack) {
+        Stack *old = stack;
+        stack      = stack->next;
+        delete old;
+    }
+}
+
+
+XiftAttributes::Attr &XiftAttributes::Attribute(const char *name)
+{
+    Stack *current = stack;
+    while (current) {
+        if (!strcmp(current->item.name, name)) {
+            return current->item;
+        }
+        current = current->next;
+    }
+    Attr &res = New();
+    res.nlen  = strlen(name);
+    res.name  = xift_str_create_copy(name, name + res.nlen);
+    res.nsize = res.nlen + 1;
+    return res;
+}
+
+void XiftAttributes::Remove(const char *name)
+{
+    Stack **current = &stack;
+    while (*current) {
+        if (!strcmp((*current)->item.name, name)) {
+            Stack *old = *current;
+            *current   = (*current)->next;
+            delete old;
+            return;
+        }
+        current = &(*current)->next;
+    }
+}
+
+
+XiftAttributes::Attr::Attr():
+    name(0), nlen(0), nsize(0), value(0), vlen(0), vsize(0)
+{}
+
+XiftAttributes::Attr::~Attr()
+{
+    if (name) free(name);
+    if (value) free(value);
+}
+
+
+bool XiftAttributes::Attr::MatchesForm(const XiftAttributes::Attr &form) const
+{
+    return !strcmp(name, form.name);
+}
+
+
+XiftAttributes::Attr *XiftAttributes::Top()
+{
+    if (stack) {
+        return &stack->item;
+    } else {
+        return 0;
+    }
+}
+
+void XiftAttributes::Pop()
+{
+    if (stack) {
+        Stack *old = stack;
+        stack      = stack->next;
+        delete old;
+    }
+}
+
+XiftAttributes::Attr &XiftAttributes::New()
+{
+    Stack *old  = stack;
+    stack       = new Stack;
+    stack->next = old;
+    return stack->item;
+}
+
+bool XiftAttributes::ContainsMatchedForm(
+    const XiftAttributes::Attr &attribute
+) const
+{
+    Stack *current = stack;
+    while (current) {
+        if (attribute.MatchesForm(current->item)) {
+            return true;
+        }
+        current = current->next;
+    }
+    return false;
+}
+
+bool XiftAttributes::MatchesForm(const XiftAttributes &form) const
+{
+    Stack *current = stack;
+    while (current) {
+        if (!form.ContainsMatchedForm(current->item)) {
+            return false;
+        }
+        current = current->next;
+    }
+    return true;
+}