配置文件的读，添加，修改，删除

1. /*
2.  *从配置文件中读取相应的值
3.  *输入参数：1，配置文件路径 2，匹配标记 3，输出存储空间
4.  *并且排除了空行，“=”前后无内容，无“=”的情况
5.  */
6. ReadConfig(char *conf_path,char *conf_name,char *config_buff)
7. {
8.     char config_linebuf[256];
9.     char line_name[40];
10.     char exchange_buf[256];
11.     char *config_sign = "=";
12.     char *leave_line;
13.     FILE *f;
14.     f = fopen(conf_path,"r");
15.     if(f == NULL)
16.     {
17.         printf("OPEN CONFIG FALID/n");
18.         return 0;
19.     }
20.     fseek(f,0,SEEK_SET); 
21.     while(fgets(config_linebuf,256,f) != NULL)
22.     {   
23.         if(strlen(config_linebuf) < 3) //判断是否是空行
24.         {
25.             continue;
26.         }
27.         if (config_linebuf[strlen(config_linebuf)-1] == 10) //去除最后一位是/n的情况
28.         {
29.             
30.             memset(exchange_buf,0,sizeof(exchange_buf));
31.             strncpy(exchange_buf,config_linebuf,strlen(config_linebuf)-1);
32.             memset(config_linebuf,0,sizeof(config_linebuf));
33.             strcpy(config_linebuf,exchange_buf);
34.         }
35.         memset(line_name,0,sizeof(line_name));
36.         leave_line = strstr(config_linebuf,config_sign);
37.         if(leave_line == NULL)                            //去除无"="的情况
38.         {
39.             continue;
40.         }
41.         int leave_num = leave_line - config_linebuf;
42.         strncpy(line_name,config_linebuf,leave_num);
43.         if(strcmp(line_name,conf_name) ==0)
44.         {
45.             strncpy(config_buff,config_linebuf+(leave_num+1),strlen(config_linebuf)-leave_num-1);
                break;
46.         }
47.         if(fgetc(f)==EOF)
48.         {
49.             break;  
50.         }
51.         fseek(f,-1,SEEK_CUR);
52.         memset(config_linebuf,0,sizeof(config_linebuf));
53.     }
54.     fclose(f);
55. }
56. 
    
57. 
    
58. /*
59.  *添加修改文件（当配置文件中存在标记字段，则进行修改，若不存在则进行添加）
60.  *
61.  *输入参数：1，配置文件路径 2，匹配标记 3，替换或添加的内容
62.  *
63.  */
64. AddOrAltConfig(char *conf_path,char *conf_name,char *config_buff)
65. {
66.     
67.     char config_linebuf[256];
68.     char line_name[40];
69.     char *config_sign = "=";
70.     char *leave_line;
71.     int  alter_sign = 0;
72.     
73.     FILE *f;
74.     f = fopen(conf_path,"r+");
75.     if(f == NULL)
76.     {
77.         printf("OPEN CONFIG FALID/n");
78.         return 0;
79.     }
80.     fseek(f,0,SEEK_END);
81.     long congig_lenth = ftell(f);
82.     int configbuf_lenth = strlen(config_buff);
83.     configbuf_lenth = configbuf_lenth + 5;
84.     char sum_buf[congig_lenth+configbuf_lenth];
85.     memset(sum_buf,0,sizeof(sum_buf));
86.     fseek(f,0,SEEK_SET); 
87.     while(fgets(config_linebuf,256,f) != NULL)
88.     {   
89.         if(strlen(config_linebuf) < 3) //判断是否是空行
90.         {
91.             strcat(sum_buf,config_linebuf);
92.             continue;
93.         }
94.         leave_line = NULL;
95.         leave_line = strstr(config_linebuf,config_sign);
96.         if(leave_line == NULL)                            //去除无"="的情况
97.         {
98.             strcat(sum_buf,config_linebuf);
99.             continue;
100.         }
101.         int leave_num = leave_line - config_linebuf;
102.         memset(line_name,0,sizeof(line_name));
103.         strncpy(line_name,config_linebuf,leave_num);
104.         if(strcmp(line_name,conf_name) ==0)
105.         {
106.             strcat(sum_buf,config_buff);
107.             strcat(sum_buf,"/n");
108.             alter_sign = 1;
109.         }
110.         else
111.         {
112.             strcat(sum_buf,config_linebuf);
113.         }
114.         if(fgetc(f)==EOF)
115.         {
116.             break;  
117.         }
118.         fseek(f,-1,SEEK_CUR);
119.         memset(config_linebuf,0,sizeof(config_linebuf));
120.     }
121.     if(alter_sign == 0)
122.     {
123.         strcat(sum_buf,config_buff);
124.         strcat(sum_buf,"/n");
125.     }
126.     printf("---sum_buf---->%s<----------/n",sum_buf);
127.     remove(conf_path);
128.     fclose(f);
129.     FILE *fp;
130.     fp = fopen(conf_path,"w+");
131.     if(fp == NULL)
132.     {
133.         printf("OPEN CONFIG FALID/n");
134.         return 2;
135.     }
136.     fseek(fp,0,SEEK_SET);
137.     fputs(sum_buf,fp);
138.     fclose(fp);
139. }
140. 
     
141. 
     
142. 
     
143. /*
144.  *删除配置文件内容（
145.  *
146.  *输入参数：1，配置文件路径 2，匹配标记 
147.  *
148.  */
149. DeleteConfig(char *conf_path,char *conf_name)
150. {
151.     
152.     char config_linebuf[256];
153.     char line_name[40];
154.     char *config_sign = "=";
155.     char *leave_line;
156.     
157.     FILE *f;
158.     f = fopen(conf_path,"r+");
159.     if(f == NULL)
160.     {
161.         printf("OPEN CONFIG FALID/n");
162.         return 0;
163.     }
164.     fseek(f,0,SEEK_END);
165.     long congig_lenth = ftell(f);
166.     char sum_buf[congig_lenth+2];
167.     memset(sum_buf,0,sizeof(sum_buf));
168.     fseek(f,0,SEEK_SET); 
169.     while(fgets(config_linebuf,256,f) != NULL)
170.     {   
171.         if(strlen(config_linebuf) < 3) //判断是否是空行
172.         {
173.             strcat(sum_buf,config_linebuf);
174.             continue;
175.         }
176.         leave_line = NULL;
177.         leave_line = strstr(config_linebuf,config_sign);
178.         if(leave_line == NULL)                            //去除无"="的情况
179.         {
180.             strcat(sum_buf,config_linebuf);
181.             continue;
182.         }
183.         int leave_num = leave_line - config_linebuf;
184.         memset(line_name,0,sizeof(line_name));
185.         strncpy(line_name,config_linebuf,leave_num);
186.         if(strcmp(line_name,conf_name) ==0)
187.         {
188.             
189.         }
190.         else
191.         {
192.             strcat(sum_buf,config_linebuf);
193.         }
194.         
195.         if(fgetc(f)==EOF)
196.         {
197.             break;  
198.         }
199.         fseek(f,-1,SEEK_CUR);
200.         memset(config_linebuf,0,sizeof(config_linebuf));
201.     }
202.     printf("---sum_buf---->%s<----------/n",sum_buf);
203.     remove(conf_path);
204.     fclose(f);
205.     FILE *fp;
206.     fp = fopen(conf_path,"w+");
207.     if(fp == NULL)
208.     {
209.         printf("OPEN CONFIG FALID/n");
210.         return 2;
211.     }
212.     fseek(fp,0,SEEK_SET);
213.     fputs(sum_buf,fp);
214.     fclose(fp);
215. }