1.概述
有时在写一个程序时经常会从一个配置文件中读取一系列的参数，在度bluez代码时发现了一个非常好的方法。
2.使用方法
这个方法基于glib-2.0，例如要从名为main.conf中读取里面的配置值。
offmode = NoScan
pagetimeout = 8192
age = 26
main.conf文件内容：
[General]
# List of plugins that should not be loaded on bluetoothd startup
#DisablePlugins = network,input
# Default adaper name
# %h - substituted for hostname
# %d - substituted for adapter id
Name = %h-%d：
# Default device class. Only the major and minor device class bits are
# considered
Class = 0x000100
# How long to stay in discoverable mode before going back to non-discoverable
# The value is in seconds. Default is 180, i.e. 3 minutes.
# 0 = disable timer, i.e. stay discoverable forever
DiscoverableTimeout = 0
# Use some other page timeout than the controller default one
# (16384 = 10 seconds)
PageTimeout = 8192
# Behaviour for Adapter.SetProperty("mode", "off")
# Possible values: "DevDown", "NoScan" (default)
OffMode = NoScan
# Discover scheduler interval used in Adapter.DiscoverDevices
# The value is in seconds. Defaults is 0 to use controller scheduler
DiscoverSchedulerInterval = 0
[test]
age=26
代码如下：
#include <glib.h>
static GKeyFile *load_config(const char *file)
{
GError *err = NULL;
GKeyFile *keyfile;
keyfile = g_key_file_new();
g_key_file_set_list_separator(keyfile, ',');
if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
error("Parsing %s failed: %s", file, err->message);
g_error_free(err);
g_key_file_free(keyfile);
return NULL;
}
return keyfile;
}
int main(int argc, int **argv)
{
char* str;
int val1,val2;
GError* err = NULL;
GKeyFile* keyfile;
keyfile = load_config("main.conf");
str = g_key_file_get_string(keyfile,"General","OffMode",&err);
if (err) {
printf("%s",err->message);
g_clear_error(&err);
}
val1 = g_key_file_get_integer(keyfile,"General","PageTimeout",&err);
if (err) {
printf("%s",err->message);
g_clear_error(&err);
}
val2 = g_key_file_get_integer(keyfile,"test","age",&err);
if (err) {
printf("%s",err->message);
g_clear_error(&err);
}
printf("offmode = %s\n",str);
printf("pagetimeout = %d\n",val1);
printf("age = %d\n",val2);
return 0;
}
编译命令：
gcc -g `pkg-config --cflags --libs glib-2.0 gthread-2.0` glib_parser.c -o glib_parser