- Add libmysql to the tree

1 files changed, 52 insertions, 0 deletions

diff --git a/ext/mysql/libmysql/my_read.c b/ext/mysql/libmysql/my_read.c
new file mode 100644
index 0000000000..b112927a3e
--- /dev/null
+++ b/ext/mysql/libmysql/my_read.c
@@ -0,0 +1,52 @@
+/* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
+   This file is public domain and comes with NO WARRANTY of any kind */
+
+#include "mysys_priv.h"
+#include "mysys_err.h"
+#include <errno.h>
+
+
+	/* Read a chunk of bytes from a file  */
+
+uint my_read(File Filedes, byte *Buffer, uint Count, myf MyFlags)
+				/* File descriptor */
+				/* Buffer must be at least count bytes */
+				/* Max number of bytes returnd */
+				/* Flags on what to do on error */
+{
+  uint readbytes;
+  DBUG_ENTER("my_read");
+  DBUG_PRINT("my",("Fd: %d  Buffer: %lx  Count: %u  MyFlags: %d",
+		   Filedes, Buffer, Count, MyFlags));
+
+  for (;;)
+  {
+    errno=0;					/* Linux doesn't reset this */
+    if ((readbytes = (uint) read(Filedes, Buffer, Count)) != Count)
+    {
+      my_errno=errno ? errno : -1;
+      DBUG_PRINT("warning",("Read only %ld bytes off %ld from %d, errno: %d",
+			    readbytes,Count,Filedes,my_errno));
+#ifdef THREAD
+      if (readbytes == 0 && errno == EINTR)
+	continue;				/* Interrupted */
+#endif
+      if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
+      {
+	if ((int) readbytes == -1)
+	  my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
+		   my_filename(Filedes),my_errno);
+	else if (MyFlags & (MY_NABP | MY_FNABP))
+	  my_error(EE_EOFERR, MYF(ME_BELL+ME_WAITTANG),
+		   my_filename(Filedes),my_errno);
+      }
+      if ((int) readbytes == -1 || (MyFlags & (MY_FNABP | MY_NABP)))
+	DBUG_RETURN(MY_FILE_ERROR);	/* Return with error */
+    }
+
+    if (MyFlags & (MY_NABP | MY_FNABP))
+      readbytes=0;			/* Ok on read */
+    break;
+  }
+  DBUG_RETURN(readbytes);
+} /* my_read */