From 4849ea60928f118cc4747b79c227f53c86f70ac9 Mon Sep 17 00:00:00 2001
From: katalx
Date: Mon, 2 Feb 2026 04:00:32 -0500
Subject: basic parsing

---
 main.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 55 insertions(+), 4 deletions(-)

(limited to 'main.c')

diff --git a/main.c b/main.c
index a886d9b..e883f29 100644
--- a/main.c
+++ b/main.c
@@ -213,24 +213,70 @@ parse_request(Str url, Request *req)
 /* documents */
 
 typedef enum {
-	DOC_ERROR,
 	DOC_TEXT,
 	DOC_GOPHERMAP,
+	DOC_ERROR,
 	DOC_UNKNOWN
 } DocType;
 
+typedef struct DocLine {
+	struct DocLine *next, *prev;
+	Str s;
+} DocLine;
+
 typedef struct {
 	Arena arena;
 	DocType type;
 	Str src;
+	DocLine *head, *tail;
 } Doc;
 
+/* document parsing */
+
+DocLine *
+doc_push_line(Doc *d, Str s)
+{
+	DocLine *n = new(&d->arena, DocLine);
+	n->s = s;
+	n->prev = d->tail;
+	if (d->tail) d->tail->next = n;
+	if (!d->head) d->head = n;
+	d->tail = n;
+	return n;
+}
+
+int
+parse_text(Doc *d)
+{
+	Str s = d->src;
+	while (s.n > 0) {
+		Cut c = str_cut(s, '\n');
+		doc_push_line(d, c.head);
+		s = c.tail;
+	}
+	return 0;
+}
+
 int
-doc_parse(Doc *d, Str src, DocType t)
+parse_doc(Doc *d)
 {
+	switch (d->type) {
+	case DOC_TEXT:
+		return parse_text(d);
+	case DOC_GOPHERMAP:
+		doc_push_line(d, S("Gophermaps are unimplemented"));
+		return -1;
+	case DOC_ERROR:
+		doc_push_line(d, S("Error"));
+		return -1;
+	default:
+		break;
+	}
+	doc_push_line(d, S("Unknown document type"));
+	return -1;
 }
 
-/* fetching documents */
+/* document fetching */
 
 ssize_t
 write_str(int fd, Str s)
@@ -319,7 +365,12 @@ main(void)
 
 	Str buf = { 0 };
 	printf("fetch() -> %d\n", fetch(&buf, req, &scratch, &scratch));
-	printf("%.*s\n", (int)buf.n, buf.s);
+	Doc doc = { .arena = scratch, .src = buf };
+	printf("parse() -> %d\n", parse_doc(&doc));
+	int i = 0;
+	for (DocLine *l = doc.head; l && i < 10; (l = l->next), i++) {
+		printf("%d %.*s\n", i, (int)l->s.n, l->s.s);
+	}
 
 	addr_fini();
 	return 0;
-- 
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