[MOD] Be stringent about OIDs, use fmemopen

src/Streams/Reader.c

@@ -7,125 +7,13 @@
 
 #include <string.h>
 
-typedef struct ReaderCookie {
-    size_t length;
-    size_t offset;
-    char *buffer;
-} ReaderCookie;
-
-#define Remaining() (cook->length - cook->offset)
-
-static ssize_t
-ReadStreamReader(void *coop, void *to, size_t n)
-{
-    ReaderCookie *cook = coop;
-    size_t remaining;
-    if (!cook)
-    {
-        return 0;
-    }
-
-    remaining = Remaining();
-    if (n > remaining)
-    {
-        memcpy(to, cook->buffer + cook->offset, remaining);
-        cook->offset = cook->length;
-        return remaining;
-    }
-
-    memcpy(to, cook->buffer + cook->offset, n);
-    cook->offset += n;
-    return n;
-}
-static ssize_t
-WriteStreamReader(void *coop, void *from, size_t n)
-{
-    /* Writing to a stream reader is silly. */
-    return 0;
-}
-static off_t
-SeekStreamReader(void *coop, off_t mag, int sgn)
-{
-    ReaderCookie *cook = coop;
-    if (!cook)
-    {
-        return 0;
-    }
-
-    switch (sgn)
-    {
-        case SEEK_SET:
-            if (mag > cook->length)
-            {
-                cook->offset = cook->length;
-                return 0;
-            }
-            else if (mag < 0)
-            {
-                cook->offset = 0;
-                return 0;
-            }
-            cook->offset = mag;
-            return 0;
-        case SEEK_CUR:
-            cook->offset += mag;
-            if (cook->offset > cook->length)
-            {
-                cook->offset = cook->length;
-            }
-            else if (cook->offset < 0)
-            {
-                cook->offset = 0;
-            }
-            return 0;
-        case SEEK_END:
-            cook->offset += cook->length + mag;
-            if (cook->offset > cook->length)
-            {
-                cook->offset = cook->length;
-            }
-            else if (cook->offset < 0)
-            {
-                cook->offset = 0;
-            }
-            return 0;
-            
-    }
-    return 0;
-}
-
-static int
-CloseStreamReader(void *coop)
-{
-    /* Nothing to free as of now. */
-    if (coop)
-    {
-        Free(coop);
-    }
-    return 0;
-}
-
-const static IoFunctions Functions = {
-    .read   = ReadStreamReader,
-    .seek   = SeekStreamReader,
-    .write  = WriteStreamReader,
-    .close  = CloseStreamReader,
-};
-
 Stream *
 StrStreamReaderN(char *buffer, int n)
 {
-    Io *raw_io;
-    ReaderCookie *cookie;
     if (!buffer)
     {
         return NULL;
     }
 
-    cookie = Malloc(sizeof(*cookie));
-    cookie->buffer = buffer;
-    cookie->length = n ? n : strlen(buffer);
-    cookie->offset = 0;
-    raw_io = IoCreate(cookie, Functions);
-    return StreamIo(raw_io);
+    return StreamFile(fmemopen(buffer, n ? n : strlen(buffer), "rb"));
 }