From 3d334dca671898241732dbc0ef6838b768308da7 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 21 Sep 2023 02:18:35 +0000
Subject:  Implement If-Modified-Since

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libtipidee/tipidee_util_chunked_read.c | 41 ++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 src/libtipidee/tipidee_util_chunked_read.c

(limited to 'src/libtipidee/tipidee_util_chunked_read.c')

diff --git a/src/libtipidee/tipidee_util_chunked_read.c b/src/libtipidee/tipidee_util_chunked_read.c
new file mode 100644
index 0000000..850ffae
--- /dev/null
+++ b/src/libtipidee/tipidee_util_chunked_read.c
@@ -0,0 +1,41 @@
+/* ISC license. */
+
+#include <string.h>
+#include <errno.h>
+
+#include <skalibs/types.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/unix-timed.h>
+
+#include <tipidee/util.h>
+
+#include <skalibs/posixishard.h>
+
+int tipidee_util_chunked_read (buffer *b, stralloc *sa, size_t maxlen, tain const *deadline, tain *stamp)
+{
+  char line[512] ;
+  for (;;)
+  {
+    size_t chunklen, pos, w = 0 ;
+    ssize_t r = timed_getlnmax(b, line, 512, &w, '\n', deadline, stamp) ;
+    if (r < 0) return 0 ;
+    if (!r) return (errno = EPIPE, 0) ;
+    pos = size_scan(line, &chunklen) ;
+    if (!pos) return (errno = EPROTO, 0) ;
+    if (!memchr("\r\n; \t", line[pos], 5)) return (errno = EPROTO, 0) ;
+    if (!chunklen) break ;
+    if (sa->len + chunklen > maxlen) return (errno = EMSGSIZE, 0) ;
+    if (!stralloc_readyplus(sa, chunklen)) return 0 ;
+    if (buffer_timed_get(b, sa->s + sa->len, chunklen, deadline, stamp) < chunklen) return 0 ;
+    sa->len += chunklen ;
+  }
+  for (;;)
+  {
+    size_t w = 0 ;
+    ssize_t r = timed_getlnmax(b, line, 512, &w, '\n', deadline, stamp) ;
+    if (r < 0) return 0 ;
+    if (!r) return (errno = EPIPE, 0) ;
+    if (w == 1 || (w == 2 && line[0] == '\r')) break ;
+  }
+  return 1 ;
+}
-- 
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