From 06f8a5a52f95ea2e902072dc70cad013c68c4577 Mon Sep 17 00:00:00 2001
From: alex <alex@infiniteadaptability.org>
Date: Wed, 29 Dec 2021 11:48:05 -0800
Subject: [PATCH] ...

---
 inc/meta.h |  1 +
 src/meta.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 72 insertions(+), 6 deletions(-)

diff --git a/inc/meta.h b/inc/meta.h
index 64106e1..3f22178 100644
--- a/inc/meta.h
+++ b/inc/meta.h
@@ -1,6 +1,7 @@
 #ifndef __META_H_
 #define __META_H_
 
+#include<fs.h>
 #include<rss.h>
 
 #define META_MAX_LINE_SIZE 1024
diff --git a/src/meta.c b/src/meta.c
index 561b5ad..18b74a4 100644
--- a/src/meta.c
+++ b/src/meta.c
@@ -1,6 +1,6 @@
 #include<meta.h>
 
-static int meta_escape(char *buf, size_t buf_size);
+static int meta_escape(char*,size_t);
 static FILE *meta_search(const char*);
 static ssize_t next_line(FILE*,char*,size_t);
 
@@ -37,7 +37,50 @@ panic:
 }
 
 static int meta_escape(char *buf, size_t buf_size) {
-	return -1;
+	char *p;
+	size_t len, left;
+
+	const char to_escape[] = "<\\>&";
+
+	p = strpbrk(buf,to_escape);
+	while(NULL!=p) {
+		len = strlen(p);
+		left = buf_size - (p - buf) - len;
+
+		switch(p[0]) {
+			case '<':
+				if(left<=4) { return -1; }
+				memmove(&(p[4]),p,len);
+				strcpy(p,"&lt;")
+				p += 4;
+				break;
+			case '\\':
+				if(p[1]=='n') {
+					p[0] = '\n';
+					memmove(&(p[1]),&(p[2]),len);
+					p++;
+				}
+				break;
+			case '>';
+				if(left<=4) { return -1; }
+				memmove(&(p[4]),p,len);
+				strcpy(p,"&gt;")
+				p += 4;
+				break;
+			case '&':
+				if(left<=5) { return -1; }
+				memmove(&(p[5]),p,len);
+				strcpy(p,"&amp;")
+				p += 5;
+				break;
+			default:
+				return -1;
+		}
+
+		p = strpbrk(p,to_escape);
+	}
+
+	return 1;
 }
 
 int meta_info(const char *path, struct rss_channel_info *info) {
@@ -73,11 +116,33 @@ panic:
 }
 
 static FILE *meta_search(const char *path) {
-	return NULL;
+	char *p;
+	size_t len;
+
+	if(NULL==path) { return NULL; }
+
+	len = strlen(path);
+	if(0==len) { return NULL; }
+
+	if(1==is_directory(path)) {
+		p = concat(path,".meta");
+		if(NULL==p) { return NULL; }
+	} else {
+		p = malloc(sizeof(char)*len);
+		if(NULL==p) { return NULL; }
+
+		strcpy(p,path);
+		strncat(p,".meta",5);
+	}
+
+	fp = fopen(p,"r");
+	return fp;
 }
 
 static ssize_t next_line(FILE *fp, char *buf, size_t buf_size) {
-	// escape+parse
-	//
-	return -1;
+	if(fgets(buf,buf_size,fp)==NULL) { return -1; }
+
+	if(meta_escape(buf,buf_size)<0) { return -1; }
+
+	return 1;
 }
-- 
2.30.2