Don't thread ctx through safe fz_obj functions.

1 files changed, 61 insertions, 0 deletions

diff --git a/fitz/base_context.c b/fitz/base_context.c
new file mode 100644
index 00000000..db702e8e
--- /dev/null
+++ b/fitz/base_context.c
@@ -0,0 +1,61 @@
+#include "fitz.h"
+
+static fz_obj *
+fz_resolve_indirect_null(fz_obj *ref)
+{
+	return ref;
+}
+
+fz_obj *(*fz_resolve_indirect)(fz_obj*) = fz_resolve_indirect_null;
+
+void
+fz_free_context(fz_context *ctx)
+{
+	assert(ctx != NULL);
+
+	/* Other finalisation calls go here (in reverse order) */
+
+	if (ctx->error)
+	{
+		assert(ctx->error->top == -1);
+		ctx->alloc->free(ctx->alloc->opaque, ctx->error);
+	}
+
+	/* Free the context itself */
+	ctx->alloc->free(ctx->alloc->opaque, ctx);
+
+	/* We do NOT free the allocator! */
+}
+
+fz_context *
+fz_new_context(fz_alloc_context *alloc)
+{
+	fz_context *ctx;
+
+	assert(alloc != NULL);
+	ctx = alloc->malloc(alloc->opaque, sizeof(fz_context));
+	if (ctx == NULL)
+		return NULL;
+	ctx->alloc = alloc;
+
+	ctx->error = alloc->malloc(alloc->opaque, sizeof(fz_error_context));
+	if (!ctx->error)
+		goto cleanup;
+	ctx->error->top = -1;
+	ctx->error->message[0] = 0;
+
+	/* New initialisation calls for context entries go here */
+
+	return ctx;
+
+cleanup:
+	fprintf(stderr, "cannot create context\n");
+	fz_free_context(ctx);
+	return NULL;
+}
+
+fz_context *
+fz_clone_context(fz_context *ctx)
+{
+	return fz_new_context(ctx->alloc);
+}