1 files changed, 91 insertions, 0 deletions
diff --git a/imap/src/c-client/flstring.c b/imap/src/c-client/flstring.c
new file mode 100644
index 00000000..bbdbe3c8
--- /dev/null
+++ b/imap/src/c-client/flstring.c
@@ -0,0 +1,91 @@
+/* ========================================================================
+ * Copyright 1988-2006 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 
+ * ========================================================================
+ */
+
+/*
+ * Program:	File string routines
+ *
+ * Author:	Mark Crispin
+ *		Networks and Distributed Computing
+ *		Computing & Communications
+ *		University of Washington
+ *		Administration Building, AG-44
+ *		Seattle, WA  98195
+ *		Internet: MRC@CAC.Washington.EDU
+ *
+ * Date:	15 April 1997
+ * Last Edited:	6 December 2006
+ */
+
+
+#include <stdio.h>
+#include "mail.h"
+#include "flstring.h"
+
+/* String driver for stdio file strings */
+
+static void file_string_init (STRING *s,void *data,unsigned long size);
+static char file_string_next (STRING *s);
+static void file_string_setpos (STRING *s,unsigned long i);
+
+STRINGDRIVER file_string = {
+  file_string_init,		/* initialize string structure */
+  file_string_next,		/* get next byte in string structure */
+  file_string_setpos		/* set position in string structure */
+};
+
+
+/* Initialize mail string structure for file
+ * Accepts: string structure
+ *	    pointer to string
+ *	    size of string
+ */
+
+static void file_string_init (STRING *s,void *data,unsigned long size)
+{
+  s->data = data;		/* note file descriptor */
+				/* big enough for one byte */
+  s->chunk = s->curpos = (char *) &s->data1;
+  s->size = size;		/* data size */
+  s->cursize = s->chunksize = 1;/* always call stdio */
+  file_string_setpos (s,0);	/* initial offset is 0 */
+}
+
+
+/* Get next character from string
+ * Accepts: string structure
+ * Returns: character, string structure chunk refreshed
+ */
+
+static char file_string_next (STRING *s)
+{
+  char ret = *s->curpos;
+  s->offset++;			/* advance position */
+  s->cursize = 1;		/* reset size */
+  *s->curpos = (char) getc ((FILE *) s->data);
+  return ret;
+}
+
+
+/* Set string pointer position
+ * Accepts: string structure
+ *	    new position
+ */
+
+static void file_string_setpos (STRING *s,unsigned long i)
+{
+  s->offset = i;		/* note new offset */
+  fseek ((FILE *) s->data,i,SEEK_SET);
+				/* in case using returnstringstruct hack */
+  s->chunk = s->curpos = (char *) &s->data1;
+  *s->curpos = (char) getc ((FILE *) s->data);
+}