132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
#include "ctx.h"
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#include "ivy/status.h"
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#include "node.h"
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#include "block.h"
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#include "iterate.h"
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#include <blue/object/string.h>
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#include <ivy/lang/lex.h>
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struct msgh_parser_state {
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struct parser_state s_base;
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bool s_oneline;
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unsigned int s_i;
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unsigned int s_prev;
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};
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static struct token_parse_result parse_linefeed(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct msgh_parser_state *state
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= parser_get_state(ctx, struct msgh_parser_state);
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struct ivy_ast_msgh_node *msgh
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= (struct ivy_ast_msgh_node *)state->s_base.s_node;
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if (state->s_oneline) {
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if (msgh->n_body) {
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parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
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return PARSE_RESULT(IVY_OK, 0);
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}
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return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
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}
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if (!msgh->n_sel) {
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return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
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}
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struct block_parser_state *block_state = (struct block_parser_state *)parser_push_state(ctx, IVY_AST_BLOCK);
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block_state->s_terminator = IVY_SYM_BANG;
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return PARSE_RESULT(IVY_OK, 0);
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}
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static struct token_parse_result parse_bang(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct msgh_parser_state *state
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= parser_get_state(ctx, struct msgh_parser_state);
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struct ivy_ast_msgh_node *msgh
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= (struct ivy_ast_msgh_node *)state->s_base.s_node;
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if (!msgh->n_sel || state->s_oneline) {
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return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
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}
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parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
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return PARSE_RESULT(IVY_OK, 0);
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}
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static struct token_parse_result parse_pipe(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct msgh_parser_state *state
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= parser_get_state(ctx, struct msgh_parser_state);
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struct ivy_ast_msgh_node *msgh
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= (struct ivy_ast_msgh_node *)state->s_base.s_node;
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if (!msgh->n_sel || state->s_oneline) {
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return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
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}
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state->s_oneline = true;
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parser_push_state(ctx, IVY_AST_EXPR);
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return PARSE_RESULT(IVY_OK, 0);
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}
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static enum ivy_status add_child(
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struct ivy_ast_node *parent, struct ivy_ast_node *child)
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{
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struct ivy_ast_msgh_node *msgh = (struct ivy_ast_msgh_node *)parent;
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if (child->n_type == IVY_AST_SELECTOR && !msgh->n_sel) {
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msgh->n_sel = (struct ivy_ast_selector_node *)child;
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return IVY_OK;
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}
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if (!msgh->n_body) {
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msgh->n_body = child;
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return IVY_OK;
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}
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return IVY_OK;
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}
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static void init_state(struct ivy_parser *ctx, struct parser_state *sp)
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{
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struct msgh_parser_state *state = (struct msgh_parser_state *)sp;
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state->s_oneline = false;
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state->s_i = 0;
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state->s_prev = IVY_SYM_HYPHEN;
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parser_push_state(ctx, IVY_AST_SELECTOR);
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}
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static void collect_children(
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struct ivy_ast_node *node, struct ivy_ast_node_iterator *iterator)
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{
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struct ivy_ast_msgh_node *msgh = (struct ivy_ast_msgh_node *)node;
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ast_node_iterator_enqueue_node(iterator, node, &msgh->n_sel->n_base);
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ast_node_iterator_enqueue_node(iterator, node, &msgh->n_body->n_base);
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}
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struct ast_node_type msgh_node_ops = {
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.n_add_child = add_child,
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.n_init_state = init_state,
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.n_collect_children = collect_children,
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.n_state_size = sizeof(struct msgh_parser_state),
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.n_node_size = sizeof(struct ivy_ast_msgh_node),
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.n_token_parsers = {
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TOK_PARSER(LINEFEED, parse_linefeed),
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},
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.n_symbol_parsers = {
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SYM_PARSER(BANG, parse_bang),
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SYM_PARSER(PIPE, parse_pipe),
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},
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};
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