bshell: re-organise build into three separate components

bshell: the front-end binary
bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts
bshell.core: contains the builtin commandlets and aliases

bshell.runtime/runtime/scope.c

@@ -0,0 +1,92 @@
+#include "scope.h"
+
+#include <bshell/runtime/runtime.h>
+#include <fx/vector.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct bshell_runtime_scope *runtime_push_scope(
+	struct bshell_runtime *rt,
+	enum bshell_runtime_scope_type type,
+	bshell_scriptblock *block)
+{
+	struct bshell_runtime_scope *out = malloc(sizeof *out);
+	if (!out) {
+		return NULL;
+	}
+
+	memset(out, 0x0, sizeof *out);
+
+	out->s_type = type;
+	out->s_functions = fx_hashtable_create();
+
+	if (block) {
+		bshell_runtime_scope_set_block(out, block);
+	}
+
+	fx_queue_push_back(&rt->rt_scope, &out->s_entry);
+	return out;
+}
+
+void runtime_pop_scope(struct bshell_runtime *rt)
+{
+	fx_queue_entry *entry = fx_queue_pop_back(&rt->rt_scope);
+	if (!entry) {
+		return;
+	}
+
+	struct bshell_runtime_scope *scope
+		= fx_unbox(struct bshell_runtime_scope, entry, s_entry);
+	/* TODO */
+	fx_hashtable_unref(scope->s_functions);
+	free(scope);
+}
+
+struct bshell_runtime_scope *runtime_get_scope(struct bshell_runtime *rt)
+{
+	fx_queue_entry *entry = fx_queue_last(&rt->rt_scope);
+	if (!entry) {
+		return NULL;
+	}
+
+	return fx_unbox(struct bshell_runtime_scope, entry, s_entry);
+}
+
+void bshell_runtime_scope_push_value(
+	struct bshell_runtime_scope *scope,
+	const fx_value *value)
+{
+	fx_value *slot = fx_vector_emplace_back(scope->s_stack, NULL);
+	if (!slot) {
+		return;
+	}
+
+	fx_value_copy(slot, value);
+}
+
+fx_value bshell_runtime_scope_pop_value(struct bshell_runtime_scope *scope)
+{
+	if (scope->s_stack.count == 0) {
+		return FX_VALUE_EMPTY;
+	}
+
+	fx_value v = scope->s_stack.items[scope->s_stack.count - 1];
+	fx_vector_pop_back(scope->s_stack, NULL);
+	return v;
+}
+
+void bshell_runtime_scope_set_block(
+	struct bshell_runtime_scope *scope,
+	bshell_scriptblock *block)
+{
+	scope->s_block = block;
+	scope->s_ip = 0;
+	bshell_scriptblock_get_text(block, &scope->s_instr, &scope->s_nr_instr);
+	bshell_scriptblock_get_pool(block, &scope->s_pool, &scope->s_nr_pool);
+}
+
+fx_hashtable *bshell_runtime_scope_get_functions(
+	struct bshell_runtime_scope *scope)
+{
+	return scope->s_functions;
+}