一、遍历一个文件夹的所有文件代码
代码语言：javascript复制int listallfilename(const char* path)
{
DIR *dir;
struct dirent *ptr;
dir = opendir(path);
while((ptr = readdir(dir)) != NULL)
{
printf("path=%s,d_name: %s\n",path,ptr->d_name);
}
closedir(dir);
return 0;
}二、函数strstri不区分大小写查找字符串c代码
代码语言：javascript复制char* strstri(char * inBuffer, char * inSearchStr)
{
char* currBuffPointer = inBuffer;
while (*currBuffPointer != 0x00)
{
char* compareOne = currBuffPointer;
char* compareTwo = inSearchStr;
//统一转换为小写字符
while (tolower(*compareOne) == tolower(*compareTwo))
{
compareOne++;
compareTwo++;
if (*compareTwo == 0x00)
{
return (char*) currBuffPointer;
}
}
currBuffPointer++;
}
return NULL;
}三、实际应用测试程序
代码语言：javascript复制#include
#include
#include
#include
#include
struct rk3288_display_devices
{
bool hdmi;
bool lvds;
bool mipi;
bool edp;
};
struct rk3288_display_devices m_display_devices={0,0,0,0};
char* strstri( char* inBuffer, const char* inSearchStr)
{
const char* currBuffPointer = inBuffer;
while (*currBuffPointer != 0x00)
{
const char* compareOne = currBuffPointer;
const char* compareTwo = inSearchStr;
while (tolower(*compareOne) == tolower(*compareTwo))
{
compareOne++;
compareTwo++;
if (*compareTwo == 0x00)
{
return (char*) currBuffPointer;
}
}
currBuffPointer++;
}
return NULL;
}
int check_rk3288_drm_display_devices(const char* path)
{
DIR *dir;
struct dirent *ptr;
dir = opendir(path);
while((ptr = readdir(dir)) != NULL)
{
printf("path=%s,d_name: %s\n",path,ptr->d_name);
if(strstri(ptr->d_name,"hdmi"))
{
m_display_devices.hdmi=true;
printf("hdmi \r\n");
}else if(strstri(ptr->d_name,"mipi"))
{
m_display_devices.mipi=true;
printf("mipi \r\n");
}else if(strstri(ptr->d_name,"lvds"))
{
m_display_devices.lvds=true;
printf("lvds \r\n");
}
else if(strstri(ptr->d_name,"edp"))
{
m_display_devices.edp=true;
printf("edp \r\n");
}
}
closedir(dir);
return 0;
}
int main(){
check_rk3288_drm_display_devices("/sys/class/drm/");
return 0;
}四、android机子运行结果
xxx:/ # test_c
path=/sys/class/drm/,d_name: .
path=/sys/class/drm/,d_name: ..
path=/sys/class/drm/,d_name: card0-HDMI-A-1
hdmi
path=/sys/class/drm/,d_name: card0
path=/sys/class/drm/,d_name: renderD128
path=/sys/class/drm/,d_name: card0-LVDS-1
lvds
path=/sys/class/drm/,d_name: controlD64
path=/sys/class/drm/,d_name: version
xxx:/ # ls -a /sys/class/drm/
. .. card0 card0-HDMI-A-1 card0-LVDS-1 controlD64 renderD128 version
xxx:/ #