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feat: part of the story api exposed via c bindings

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Brett Broadhurst 2026-04-13 12:10:01 -06:00
parent a065e5bf46
commit 3afbbb6ec2
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6 changed files with 748 additions and 16 deletions
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11
src/Story.zig
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@ -38,6 +38,7 @@ constants_pool: []const Value = &.{},
/// Interned string bytes.
string_bytes: []const u8 = &.{},
dump_writer: ?*std.Io.Writer = null,
internal_counter: usize = 0,
pub const default_knot_name: [:0]const u8 = "$__main__$";
@ -372,23 +373,23 @@ pub fn deinit(story: *Story) void {
story.* = undefined;
}
fn currentFrame(vm: *Story) *CallFrame {
pub fn currentFrame(vm: *Story) *CallFrame {
assert(vm.call_stack_top > 0);
return &vm.call_stack[vm.call_stack_top - 1];
}
fn peekStack(vm: *Story, offset: usize) ?Value {
pub fn peekStack(vm: *Story, offset: usize) ?Value {
if (vm.stack_top <= offset) return null;
return vm.stack[vm.stack_top - offset - 1];
}
fn pushStack(vm: *Story, value: Value) !void {
pub fn pushStack(vm: *Story, value: Value) !void {
if (vm.stack_top >= vm.stack.len) return error.StackOverflow;
vm.stack[vm.stack_top] = value;
vm.stack_top += 1;
}
fn popStack(vm: *Story) ?Value {
pub fn popStack(vm: *Story) ?Value {
if (vm.stack_top == 0) return null;
const stack_top = vm.stack_top;
@ -489,7 +490,7 @@ fn divertValue(vm: *Story, value: Value, args_count: u8) !void {
}
// Diverts are essentially tail calls.
fn divert(vm: *Story, knot: *Object.Knot, args_count: u8) !void {
pub fn divert(vm: *Story, knot: *Object.Knot, args_count: u8) !void {
assert(knot.code.args_count == args_count);
if (vm.call_stack_top == 0)
return vm.call(knot, args_count);