Added Write-buffer.

[yaz-moved-to-github.git] / include / wrbuf.h

diff --git a/include/wrbuf.h b/include/wrbuf.h
new file mode 100644 (file)
index 0000000..a8bcceb
--- /dev/null
+++ b/include/wrbuf.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 1995, Index Data.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation, in whole or in part, for any purpose, is hereby granted,
+ * provided that:
+ *
+ * 1. This copyright and permission notice appear in all copies of the
+ * software and its documentation. Notices of copyright or attribution
+ * which appear at the beginning of any file must remain unchanged.
+ *
+ * 2. The names of Index Data or the individual authors may not be used to
+ * endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ * IN NO EVENT SHALL INDEX DATA BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR
+ * NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef WRBUF_H
+#define WRBUF_H
+
+typedef struct wrbuf
+{
+    char *buf;
+    int pos;
+    int size;
+} wrbuf, *WRBUF;
+
+WRBUF wrbuf_alloc(void);
+void wrbuf_free(WRBUF b, int free_buf);
+void wrbuf_rewind(WRBUF b);
+int wrbuf_grow(WRBUF b, int minsize);
+int wrbuf_write(WRBUF b, char *buf, int size);
+
+#define wrbuf_putc(b, c) \
+    (((b)->pos >= (b)->size ? wrbuf_grow(b, 1) : 0),  \
+    (b)->buf[(b)->pos++] = (c), 0)
+
+#endif