过滤出属性值对

#include <iostream>#include <fstream>#include <vector>#include <string.h>#include <stdlib.h>using namespace std;typedef struct DataUnit DataUnit;struct DataUnit {char* key;char* value;DataUnit* previous;DataUnit* next;};char* GetKey(char* p, char** begin, char** end) {char* a = p;for (; *a == ' '; a--) {}*end = a;a--;for (; *a != ' '; a--) {}*begin = ++a;return *begin;}char* GetValue(char* p, char** begin, char** end) {char* a = p;for (; *a != '\"'; a++) {}*begin = ++a;a++;for (; *a != '\"'; a++) {}*end = a;return *begin;}DataUnit* SplitString(const char* source_string, DataUnit* head) {DataUnit* one = head;char* str = const_cast<char*>(source_string);char* begin = NULL;char* end = NULL;char* p = NULL;do {p = strchr(str, '=');if (NULL == p) {return one;}DataUnit* unit = (DataUnit*) malloc(sizeof(DataUnit));memset(unit, 0, sizeof(DataUnit));GetKey(p, &begin, &end);unit->key = (char*) malloc(end - begin + 1);memset(unit->key, 0, end - begin + 1);strncpy(unit->key, begin, end - begin);GetValue(p, &begin, &end);unit->value = (char*) malloc(end - begin + 1);memset(unit->value, 0, end - begin + 1);strncpy(unit->value, begin, end - begin);unit->previous = one;one->next = unit;one = unit;str = end++;} while (p != NULL);return one;}int readConfigFile(string file_path) {ifstream input;input.open(file_path.c_str());if (!input.is_open()) {cout << "Open file: " << file_path << "fail~~" << endl;return -1;}DataUnit* head = (DataUnit*) malloc(sizeof(DataUnit));memset(head, 0, sizeof(DataUnit));DataUnit* node = head;string str;while (!input.eof()) {getline(input, str);node = SplitString(str.c_str(), node);}input.close();DataUnit one;one.next = head->next;for (; one.next != NULL; one = *(one.next)) {cout << one.next->key << "                " << one.next->value << endl;}return 0;}int main(int argc, char** argv) {if (argc != 2) {return -1;}string file_path = argv[1];readConfigFile(file_path);return 0;}