web: move elem construction to shared dom file

1 files changed, 67 insertions, 0 deletions

diff --git a/web/web_dom.c b/web/web_dom.c
new file mode 100644
index 0000000..ddb59ad
--- /dev/null
+++ b/web/web_dom.c
@@ -0,0 +1,67 @@
+#include "web_dom.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <emscripten/emscripten.h>
+
+struct elem *elem_init(char *ns, char *name, int size_attrs)
+{
+	struct elem *e = malloc(sizeof(*e));
+
+	e->ns = ns ? strdup(ns) : NULL;
+	e->name = strdup(name);
+
+	e->n_attrs = 0;
+	e->size_attrs = size_attrs;
+	e->attr_names = malloc(size_attrs * sizeof(*(e->attr_names)));
+	e->attr_vals = malloc(size_attrs * sizeof(*(e->attr_vals)));
+	e->content = NULL;
+
+	return e;
+}
+
+void elem_free(struct elem *e)
+{
+	for(int i = 0; i < e->n_attrs; ++i) {
+		free(e->attr_names[i]);
+		free(e->attr_vals[i]);
+	}
+
+	free(e->content);
+	free(e->attr_names);
+	free(e->attr_vals);
+	free(e->name);
+	free(e);
+}
+
+void elem_add_attr(struct elem *e, char *name, char *val)
+{
+	if (e->n_attrs == e->size_attrs) {
+		e->size_attrs *= 2;
+		e->attr_names = realloc(e->attr_names,
+			e->size_attrs * sizeof(*(e->attr_names)));
+		e->attr_vals = realloc(e->attr_vals,
+			e->size_attrs * sizeof(*(e->attr_vals)));
+	}
+
+	e->attr_names[e->n_attrs] = strdup(name);
+	e->attr_vals[e->n_attrs++] = strdup(val);
+}
+
+void elem_add_attr_double(struct elem *e, char *name, double val)
+{
+	char str[512];
+	sprintf(str, "%f", val);
+	elem_add_attr(e, name, str);
+}
+
+void append_elemv(char *sel, int elemc, struct elem **elemv)
+{
+	EM_ASM({elemAppendElemv($0, $1, $2, $3, $4, $5, $6, $7, $8)},
+		sel, elemc, elemv,
+		offsetof(struct elem, ns), offsetof(struct elem, name),
+		offsetof(struct elem, content), offsetof(struct elem, n_attrs),
+		offsetof(struct elem, attr_names), offsetof(struct elem, attr_vals));
+}