From df00882195da3fb970782f21d79a0a10e6b186b3 Mon Sep 17 00:00:00 2001
From: Nicolas Noble <pixel@nobis-crew.org>
Date: Wed, 7 Aug 2013 16:32:26 -0700
Subject: Adding readU16, readU32 and readU64. The Lua version of readU64 will
 need GMP support.

---
 TODO              |  1 +
 includes/Handle.h |  5 ++++-
 src/Handle.cc     | 39 +++++++++++++++++++++++++++++++++++++++
 src/LuaHandle.cc  | 18 ++++++++++++++++++
 4 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/TODO b/TODO
index a041126..40b6a13 100644
--- a/TODO
+++ b/TODO
@@ -1 +1,2 @@
 Protect Async against EAgains.
+Add GMP support.
\ No newline at end of file
diff --git a/includes/Handle.h b/includes/Handle.h
index 3a26282..06b1723 100644
--- a/includes/Handle.h
+++ b/includes/Handle.h
@@ -61,7 +61,10 @@ class Handle {
     void seek(off_t offset, int whence = SEEK_SET) { rseek(offset, whence); }
 
     // there need to be more of these
-    Future<uint8_t> readU8();
+    Future<uint8_t>  readU8();
+    Future<uint16_t> readU16();
+    Future<uint32_t> readU32();
+    Future<uint64_t> readU64();
 
     // these need to be changed into Future<>s
     void writeString(const char * str, ssize_t len) { if (len < 0) len = strlen(str); forceWrite(str, len); }
diff --git a/src/Handle.cc b/src/Handle.cc
index 503787b..2a03f8c 100644
--- a/src/Handle.cc
+++ b/src/Handle.cc
@@ -104,6 +104,45 @@ Balau::Future<uint8_t> Balau::Handle::readU8() {
     });
 }
 
+Balau::Future<uint16_t> Balau::Handle::readU16() {
+    IO<Handle> t(this);
+    std::shared_ptr<uint16_t> b(new uint16_t);
+    int c = 0;
+    return Future<uint16_t>([t, b, c]() mutable {
+        do {
+            int r = t->read(((uint8_t *) b.get()) + c, 2);
+            c += r;
+        } while (c < 2);
+        return *b;
+    });
+}
+
+Balau::Future<uint32_t> Balau::Handle::readU32() {
+    IO<Handle> t(this);
+    std::shared_ptr<uint32_t> b(new uint32_t);
+    int c = 0;
+    return Future<uint32_t>([t, b, c]() mutable {
+        do {
+            int r = t->read(((uint8_t *) b.get()) + c, 4);
+            c += r;
+        } while (c < 4);
+        return *b;
+    });
+}
+
+Balau::Future<uint64_t> Balau::Handle::readU64() {
+    IO<Handle> t(this);
+    std::shared_ptr<uint64_t> b(new uint64_t);
+    int c = 0;
+    return Future<uint64_t>([t, b, c]() mutable {
+        do {
+            int r = t->read(((uint8_t *) b.get()) + c, 8);
+            c += r;
+        } while (c < 8);
+        return *b;
+    });
+}
+
 void Balau::Handle::rseek(off_t offset, int whence) throw (GeneralException) {
     if (canSeek())
         throw GeneralException(String("Handle ") + getName() + " can seek, but rseek() not implemented (missing in class " + ClassName(this).c_str() + ")");
diff --git a/src/LuaHandle.cc b/src/LuaHandle.cc
index 355b992..6b8bd18 100644
--- a/src/LuaHandle.cc
+++ b/src/LuaHandle.cc
@@ -9,11 +9,15 @@ typedef IOHandle IOInput;
 enum IOHandle_methods_t {
     IOHANDLE_CLOSE,
     IOHANDLE_READU8,
+    IOHANDLE_READU16,
+    IOHANDLE_READU32,
 };
 
 struct Balau::lua_functypes_t IOHandle_methods[] = {
     { IOHANDLE_CLOSE,           "close",          0, 0, { } },
     { IOHANDLE_READU8,          "readU8",         0, 0, { } },
+    { IOHANDLE_READU16,         "readU16",        0, 0, { } },
+    { IOHANDLE_READU32,         "readU32",        0, 0, { } },
     { -1, 0, 0, 0, 0 },
 };
 
@@ -35,6 +39,18 @@ int sLua_IOHandle::IOHandle_proceed(Balau::Lua & L, int n, IOHandle * obj, int c
             return L.yield(Balau::Future<int>([L, c]() mutable { L.push((lua_Number) c.get()); return 1; }));
         }
         break;
+    case IOHANDLE_READU16:
+        {
+            Balau::Future<uint16_t> c = h->readU16();
+            return L.yield(Balau::Future<int>([L, c]() mutable { L.push((lua_Number) c.get()); return 1; }));
+        }
+        break;
+    case IOHANDLE_READU32:
+        {
+            Balau::Future<uint32_t> c = h->readU32();
+            return L.yield(Balau::Future<int>([L, c]() mutable { L.push((lua_Number) c.get()); return 1; }));
+        }
+        break;
     }
 
     return r;
@@ -51,6 +67,8 @@ void Balau::LuaHandleFactory::pushObjectAndMembers(Lua & L) {
 
     PUSH_METHOD(IOHandle, IOHANDLE_CLOSE);
     PUSH_METHOD(IOHandle, IOHANDLE_READU8);
+    PUSH_METHOD(IOHandle, IOHANDLE_READU16);
+    PUSH_METHOD(IOHandle, IOHANDLE_READU32);
 }
 
 
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