添加了读取指定配置文件的功能

添加了官方的测试用例

all_test/src/tools.c

@@ -57,4 +57,128 @@ int CheckOutput(char *program_output, char *read_output)
     {
         return BUS_FAlSE;
     }
+}
+
+rail_node_t *ChooseConfigFile(int index)
+{
+    char root_path[] = "./test_cases/";
+    char config_path[] = "/dict.dic";
+    char case_path[3];
+
+    sprintf(case_path, "%d", index);
+
+    char file_path[30];
+
+    strcat(file_path, root_path);
+    strcat(file_path, case_path);
+    strcat(file_path, config_path);
+
+    return ReadChosenConfigFile(file_path);
+}
+
+rail_node_t *ReadChosenConfigFile(char *config_file_path)
+{
+    FILE *config_file = NULL;
+    char buffer[30];
+    int total_station = 0;
+    int distance = 0;
+
+    config_file = fopen(config_file_path, "r");
+
+    // 循环读取文件的每一行
+    while (fgets(buffer, sizeof buffer, config_file) != NULL)
+    {
+        char first_char = buffer[0];
+        char *p;
+
+        switch (first_char)
+        {
+            case '#':
+                // 如果读取到#什么都不做
+                break;
+            case 'T':
+                // TOTAL_STATION
+                p = buffer;
+
+                // 把数字前面的所有字符全部干掉
+                while (*p < '0' || *p > '9')
+                {
+                    p++;
+                }
+
+                if (*p == '1' && *(p + 1) != '\n')
+                {
+                    total_station = 10;
+                }
+                else if (*(p + 1) == '\n')
+                {
+                    total_station = *p - 48;
+                }
+
+                break;
+            case 'S':
+                // STRATEGY
+                p = buffer;
+                // 将=前的字符全部略去
+                while (*p != '=')
+                {
+                    p++;
+                }
+                // =也去掉
+                p++;
+                // =和策略之间的空格也去掉
+                while (*p == ' ')
+                {
+                    p++;
+                }
+
+                if (*p == 'F' && *(p + 1) == 'C') //FCFS
+                {
+                    chosen_strategy = BUS_FCFS;
+                }
+                else if (*p == 'S' && *(p + 1) == 'S') //SSTF
+                {
+                    chosen_strategy = BUS_SSTF;
+                }
+                else if (*p == 'S' && *(p + 1) == 'C') //SCAN
+                {
+                    chosen_strategy = BUS_SCAN;
+                }
+                else
+                {
+                    // 读取失败
+                    chosen_strategy = -1;
+                }
+
+                break;
+            case 'D':
+                // DISTANCE
+                p = buffer;
+
+                // 把数字前面的所有字符全部干掉
+                while (*p < '0' || *p > '9')
+                {
+                    p++;
+                }
+
+                if (*(p + 1) == '\n')
+                {
+                    distance = *p - 48;
+                }
+
+                break;
+            default:
+                continue;
+        }
+
+    }
+
+    if (distance != 0 && total_station != 0)
+    {
+        return CreateRails(distance, total_station);
+    }
+    else
+    {
+        return NULL;
+    }
 }