后台改为zlog实现

zlog/buf.h

@@ -0,0 +1,56 @@
+/*
+ * This file is part of the zlog Library.
+ *
+ * Copyright (C) 2011 by Hardy Simpson <HardySimpson1984@gmail.com>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING in base directory.
+ */
+
+#ifndef __zlog_buf_h
+#define __zlog_buf_h
+
+/* buf, is a dynamic expand buffer for one single log,
+ * as one single log will interlace if use multiple write() to file.
+ * and buf is always keep in a thread, to make each thread has its
+ * own buffer to avoid lock.
+ */
+
+#include <stdarg.h>
+#include <stdint.h>
+
+typedef struct zlog_buf_s {
+	char *start;
+	char *tail;
+	char *end;
+	char *end_plus_1;
+
+	size_t size_min;
+	size_t size_max;
+	size_t size_real;
+
+	char truncate_str[MAXLEN_PATH + 1];
+	size_t truncate_str_len;
+} zlog_buf_t;
+
+
+zlog_buf_t *zlog_buf_new(size_t min, size_t max, const char *truncate_str);
+void zlog_buf_del(zlog_buf_t * a_buf);
+void zlog_buf_profile(zlog_buf_t * a_buf, int flag);
+
+int zlog_buf_vprintf(zlog_buf_t * a_buf, const char *format, va_list args);
+int zlog_buf_append(zlog_buf_t * a_buf, const char *str, size_t str_len);
+int zlog_buf_adjust_append(zlog_buf_t * a_buf, const char *str, size_t str_len,
+			int left_adjust, int zero_pad, size_t in_width, size_t out_width);
+int zlog_buf_printf_dec32(zlog_buf_t * a_buf, uint32_t ui32, int width);
+int zlog_buf_printf_dec64(zlog_buf_t * a_buf, uint64_t ui64, int width);
+int zlog_buf_printf_hex(zlog_buf_t * a_buf, uint32_t ui32, int width);
+
+#define zlog_buf_restart(a_buf) do { \
+	a_buf->tail = a_buf->start; \
+} while(0)
+
+#define zlog_buf_len(a_buf) (a_buf->tail - a_buf->start)
+#define zlog_buf_str(a_buf) (a_buf->start)
+#define zlog_buf_seal(a_buf) do {*(a_buf)->tail = '\0';} while (0)
+
+#endif