From 6232d13f5321b87ddf12a1aa36b4545da45f173d Mon Sep 17 00:00:00 2001 From: Joel Klinghed Date: Wed, 17 Nov 2021 22:34:57 +0100 Subject: Travel3: Simple image and video display site Reads the images and videos from filesystem and builds a site in memroy. --- src/ro_buffer.cc | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/ro_buffer.cc (limited to 'src/ro_buffer.cc') diff --git a/src/ro_buffer.cc b/src/ro_buffer.cc new file mode 100644 index 0000000..ee6208e --- /dev/null +++ b/src/ro_buffer.cc @@ -0,0 +1,29 @@ +#include "common.hh" + +#include "ro_buffer.hh" + +#include + +size_t RoBuffer::read(RoBuffer* buf, void* data, size_t len) { + assert(buf); + assert(data); + if (len == 0) + return 0; + auto* d = reinterpret_cast(data); + size_t got = 0; + while (true) { + size_t avail; + auto want = len - got; + auto* ptr = buf->rbuf(want, avail); + if (avail == 0) + return got; + if (avail >= want) { + std::copy_n(ptr, want, d + got); + buf->rcommit(want); + return len; + } + std::copy_n(ptr, avail, d + got); + buf->rcommit(avail); + got += avail; + } +} -- cgit v1.2.3-70-g09d2