后台改为zlog实现

zlog/zc_util.c

@@ -0,0 +1,147 @@
+/*
+ * 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.
+ */
+
+#include <string.h>
+#include <syslog.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "zc_defs.h"
+
+size_t zc_parse_byte_size(char *astring)
+{
+	/* Parse size in bytes depending on the suffix.   Valid suffixes are KB, MB and GB */
+	char *p;
+	char *q;
+	size_t sz;
+	long res;
+	int c, m;
+
+	zc_assert(astring, 0);
+
+	/* clear space */
+	for (p = q = astring; *p != '\0'; p++) {
+		if (isspace(*p)) {
+			continue;
+		} else {
+			*q = *p;
+			q++;
+		}
+	}
+	*q = '\0';
+
+	sz = strlen(astring);
+	res = strtol(astring, (char **)NULL, 10);
+
+	if (res <= 0)
+		return 0;
+
+	if (astring[sz - 1] == 'B' || astring[sz - 1] == 'b') {
+		c = astring[sz - 2];
+		m = 1024;
+	} else {
+		c = astring[sz - 1];
+		m = 1000;
+	}
+
+	switch (c) {
+	case 'K':
+	case 'k':
+		res *= m;
+		break;
+	case 'M':
+	case 'm':
+		res *= m * m;
+		break;
+	case 'G':
+	case 'g':
+		res *= m * m * m;
+		break;
+	default:
+		if (!isdigit(c)) {
+			zc_error("Wrong suffix parsing " "size in bytes for string [%s], ignoring suffix",
+				 astring);
+		}
+		break;
+	}
+
+	return (res);
+}
+
+/*******************************************************************************/
+int zc_str_replace_env(char *str, size_t str_size)
+{
+	char *p;
+	char *q;
+	char fmt[MAXLEN_CFG_LINE + 1];
+	char env_key[MAXLEN_CFG_LINE + 1];
+	char env_value[MAXLEN_CFG_LINE + 1];
+	int str_len;
+	int env_value_len;
+	int nscan;
+	int nread;
+
+	str_len = strlen(str);
+	q = str;
+
+	do {
+		p = strchr(q, '%');
+		if (!p) {
+			/* can't find more % */
+			break;
+		}
+
+		memset(fmt, 0x00, sizeof(fmt));
+		memset(env_key, 0x00, sizeof(env_key));
+		memset(env_value, 0x00, sizeof(env_value));
+		nread = 0;
+		nscan = sscanf(p + 1, "%[.0-9-]%n", fmt + 1, &nread);
+		if (nscan == 1) {
+			fmt[0] = '%';
+			fmt[nread + 1] = 's';
+		} else {
+			nread = 0;
+			strcpy(fmt, "%s");
+		}
+
+		q = p + 1 + nread;
+
+		nscan = sscanf(q, "E(%[^)])%n", env_key, &nread);
+		if (nscan == 0) {
+			continue;
+		}
+
+		q += nread;
+
+		if (*(q - 1) != ')') {
+			zc_error("in string[%s] can't find match )", p);
+			return -1;
+		}
+
+		env_value_len = snprintf(env_value, sizeof(env_value), fmt, getenv(env_key));
+		if (env_value_len < 0 || env_value_len >= sizeof(env_value)) {
+			zc_error("snprintf fail, errno[%d], evn_value_len[%d]",
+				 errno, env_value_len);
+			return -1;
+		}
+
+		str_len = str_len - (q - p) + env_value_len;
+		if (str_len > str_size - 1) {
+			zc_error("repalce env_value[%s] cause overlap", env_value);
+			return -1;
+		}
+
+		memmove(p + env_value_len, q, strlen(q) + 1);
+		memcpy(p, env_value, env_value_len);
+
+	} while (1);
+
+	return 0;
+}