asm: implement an asm parser and emitter

asm/parse/atom.c

@@ -0,0 +1,66 @@
+#include "parse.h"
+#include <ivy/ident.h>
+#include <ivy/asm/bin.h>
+#include <ivy/asm/assembler.h>
+#include <ivy/asm/lex.h>
+
+struct atom_parser_state {
+	struct parser_state s_base;
+	unsigned int s_prev_token;
+	
+	struct ivy_asm_token *s_name;
+};
+
+static enum ivy_status init_state(
+	struct ivy_asm_parser *ctx, struct parser_state *s)
+{
+	struct atom_parser_state *state = (struct atom_parser_state *)s;
+	state->s_prev_token = IVY_ASM_SYM_LEFT_PAREN;
+	return IVY_OK;
+}
+
+static enum ivy_status parse_ident(
+	struct ivy_asm_parser *ctx, struct ivy_asm_token *tok)
+{
+	struct atom_parser_state *state = (struct atom_parser_state *)asm_parser_get_state(ctx);
+	if (state->s_prev_token != IVY_ASM_SYM_LEFT_PAREN) {
+		return IVY_ERR_BAD_SYNTAX;
+	}
+
+	if (state->s_name) {
+		return IVY_ERR_BAD_SYNTAX;
+	}
+
+	state->s_name = tok;
+	state->s_prev_token = IVY_ASM_TOK_IDENT;
+
+	return IVY_OK;
+}
+
+static enum ivy_status parse_right_paren(
+	struct ivy_asm_parser *ctx, struct ivy_asm_token *tok)
+{
+	struct atom_parser_state *state = (struct atom_parser_state *)asm_parser_get_state(ctx);
+
+	if (state->s_prev_token != IVY_ASM_TOK_IDENT) {
+		return IVY_ERR_BAD_SYNTAX;
+	}
+
+	if (!state->s_name) {
+		return IVY_ERR_BAD_SYNTAX;
+	}
+
+	asm_parser_pop_state(ctx, state->s_name);
+	return IVY_OK;
+}
+
+struct parser_state_type atom_parser_state_type = {
+	.n_init_state = init_state,
+	.n_state_size = sizeof(struct atom_parser_state),
+	.n_token_parsers = {
+		TOK_PARSER(IDENT, parse_ident),
+	},
+	.n_symbol_parsers = {
+		SYM_PARSER(RIGHT_PAREN, parse_right_paren),
+	},
+};