Import my beloved mutt api's

[apps/pfixtools.git] / buffer.h

diff --git a/buffer.h b/buffer.h
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+++ b/buffer.h
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+/******************************************************************************/
+/*          postlicyd: a postfix policy daemon with a lot of features         */
+/*          ~~~~~~~~~                                                         */
+/*  ________________________________________________________________________  */
+/*                                                                            */
+/*  Redistribution and use in source and binary forms, with or without        */
+/*  modification, are permitted provided that the following conditions        */
+/*  are met:                                                                  */
+/*                                                                            */
+/*  1. Redistributions of source code must retain the above copyright         */
+/*     notice, this list of conditions and the following disclaimer.          */
+/*  2. Redistributions in binary form must reproduce the above copyright      */
+/*     notice, this list of conditions and the following disclaimer in the    */
+/*     documentation and/or other materials provided with the distribution.   */
+/*  3. The names of its contributors may not be used to endorse or promote    */
+/*     products derived from this software without specific prior written     */
+/*     permission.                                                            */
+/*                                                                            */
+/*  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND   */
+/*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE     */
+/*  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR        */
+/*  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS    */
+/*  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR    */
+/*  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF      */
+/*  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  */
+/*  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN   */
+/*  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)   */
+/*  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF    */
+/*  THE POSSIBILITY OF SUCH DAMAGE.                                           */
+/******************************************************************************/
+
+/*
+ * Copyright © 2006 Pierre Habouzit
+ */
+
+#ifndef MUTT_LIB_LIB_BUFFER_H
+#define MUTT_LIB_LIB_BUFFER_H
+
+#include "mem.h"
+#include "str.h"
+
+typedef struct buffer_t {
+    char *data;
+    ssize_t len;
+    ssize_t size;
+} buffer_t;
+
+DO_INIT(buffer_t, buffer);
+static inline void buffer_wipe(buffer_t *buf) {
+    p_delete(&buf->data);
+}
+DO_NEW(buffer_t, buffer);
+DO_DELETE(buffer_t, buffer);
+
+static inline char *buffer_unwrap(buffer_t **buf) {
+    char *res = (*buf)->data;
+    (*buf)->data = NULL;
+    buffer_delete(buf);
+    return res;
+}
+
+
+void buffer_resize(buffer_t *, ssize_t newsize);
+static inline void buffer_ensure(buffer_t *buf, ssize_t extra) {
+    assert (extra >= 0);
+    if (buf->len + extra >= buf->size) {
+        buffer_resize(buf, buf->len + extra);
+    }
+}
+static inline void buffer_extend(buffer_t *buf, ssize_t extra) {
+    buffer_ensure(buf, extra);
+    buf->len += extra;
+    buf->data[buf->len] = '\0';
+}
+static inline void buffer_extendch(buffer_t *buf, ssize_t extra, int c) {
+    buffer_ensure(buf, extra);
+    memset(buf->data + buf->len, c, extra);
+    buf->len += extra;
+    buf->data[buf->len] = '\0';
+}
+
+
+static inline void buffer_add(buffer_t *buf, const void *data, ssize_t len) {
+    buffer_ensure(buf, len);
+    memcpy(buf->data + buf->len, data, len);
+    buf->len += len;
+    buf->data[buf->len] = '\0';
+}
+static inline void buffer_addstr(buffer_t *buf, const char *s) {
+    buffer_add(buf, s, m_strlen(s));
+}
+static inline void buffer_addbuf(buffer_t *buf, buffer_t *buf2) {
+    buffer_add(buf, buf2->data, buf2->len);
+}
+static inline void buffer_addch(buffer_t *buf, int c) {
+    buffer_extendch(buf, 1, c);
+}
+
+#endif /* MUTT_LIB_LIB_BUFFER_H */